WO2023236717A1 - 驱动装置和血泵 - Google Patents

驱动装置和血泵 Download PDF

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Publication number
WO2023236717A1
WO2023236717A1 PCT/CN2023/093445 CN2023093445W WO2023236717A1 WO 2023236717 A1 WO2023236717 A1 WO 2023236717A1 CN 2023093445 W CN2023093445 W CN 2023093445W WO 2023236717 A1 WO2023236717 A1 WO 2023236717A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
hole
wire passing
housing
stator unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/093445
Other languages
English (en)
French (fr)
Inventor
谢端卿
余顺周
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Core Medical Technology Co Ltd
Original Assignee
Shenzhen Core Medical Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202210654824.5A external-priority patent/CN114917469A/zh
Priority claimed from CN202210654851.2A external-priority patent/CN115006715A/zh
Application filed by Shenzhen Core Medical Technology Co Ltd filed Critical Shenzhen Core Medical Technology Co Ltd
Priority to JP2024572111A priority Critical patent/JP7834203B2/ja
Priority to EP23818882.5A priority patent/EP4537890A4/en
Publication of WO2023236717A1 publication Critical patent/WO2023236717A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/40—Details relating to driving
    • A61M60/403—Details relating to driving for non-positive displacement blood pumps
    • A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
    • A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
    • A61M60/416—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor transmitted directly by the motor rotor drive shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
    • A61M60/13—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/205—Non-positive displacement blood pumps
    • A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
    • A61M60/221—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having both radial and axial components, e.g. mixed flow pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
    • A61M60/81—Pump housings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
    • A61M60/818—Bearings
    • A61M60/825—Contact bearings, e.g. ball-and-cup or pivot bearings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
    • A61M60/827—Sealings between moving parts
    • A61M60/829—Sealings between moving parts having a purge fluid supply

Definitions

  • This application relates to the technical field of medical devices, and in particular to a driving device and a blood pump.
  • An intravascular blood pump is a blood pumping device that is inserted into the patient's heart through the patient's blood vessels.
  • the intravascular blood pump is placed within the opening of the heart valve so that blood can flow through the blood pump and into the arteries.
  • traditional blood pumps suffer from a high failure rate.
  • this application provides a driving device and a blood pump, which can reduce the failure rate of the blood pump.
  • An embodiment of the first aspect of the present application provides a driving device for driving an impeller to rotate.
  • the driving device includes:
  • the pump shell has an accommodation cavity.
  • the shell wall of the pump shell is also provided with a first wire passing hole, a second wire passing hole and a limiting groove.
  • the second wire passing hole and the first wire passing hole are Both are connected to the accommodation cavity, the second wire passing hole is spaced apart from the first wire passing hole, the limiting groove is located outside the shell wall of the pump housing, and the limiting groove is located on the Between the first wire via hole and the second wire via hole;
  • a stator is received in the accommodation cavity, and the stator can drive the rotor to rotate;
  • a cover body is connected to the pump housing and completely covers the first wire passing hole, the second wire passing hole, the limiting groove and the isolation section.
  • the pump shell has an accommodation cavity.
  • the shell wall of the pump shell is also provided with a first wire passing hole, a second wire passing hole and a limiting groove.
  • the second wire passing hole and the first wire passing hole are Both are connected to the accommodation cavity, the second wire passing hole is spaced apart from the first wire passing hole, the limiting groove is located outside the shell wall of the pump housing, and the limiting groove is located on the Between the first wire via hole and the second wire via hole;
  • a stator is received in the accommodation cavity, and the stator can drive the rotor to rotate;
  • Figure 1 is a schematic three-dimensional structural diagram of a blood pump provided in an embodiment
  • Figure 3 is a schematic cross-sectional structural view of Figure 2 in the first direction
  • Figure 4 is a schematic cross-sectional structural view of Figure 2 in the second direction
  • Figure 5 is a schematic three-dimensional structural view of the first stator unit in the blood pump driving device shown in Figure 1;
  • Figure 7 is a schematic structural diagram of the rotor in the driving device of the blood pump shown in Figure 1;
  • Figure 8 is a cross-sectional view of the rotor shown in Figure 7;
  • Figure 9 is an exploded structural diagram of the rotor shown in Figure 7;
  • Figure 11 is another perspective exploded view of Figure 2 with the casing assembly completely omitted;
  • Figure 12 is another perspective exploded view of Figure 2 with the casing assembly completely omitted;
  • Figure 15 is a schematic structural diagram of the second housing of the pump housing shown in Figure 14;
  • Figure 16 is a schematic three-dimensional structural view of the first bushing of the bushing assembly of the blood pump shown in Figure 3;
  • Figure 18 is a cross-sectional view of the sleeve assembly of the blood pump shown in Figure 3;
  • FIG. 19 is an enlarged view of part A of the blood pump shown in FIG. 4 .
  • cannula assembly 100 has an inlet 110 and an outlet 120 .
  • the outlet 120 is closer to the driving device 400 than the inlet 110 .
  • the cannula assembly 100 extends through a heart valve, such as the aortic valve, with the inlet 110 located within the heart and the outlet 120 and drive device 400 located outside the heart in a blood vessel such as the aorta.
  • a heart valve such as the aortic valve
  • the impeller 200 rotates, blood flows into the cannula assembly 100 from the inlet 110 and then flows out of the cannula assembly 100 from the outlet 120 .
  • the casing assembly 100 includes a first casing 130 and a second casing 140 connected to the first casing 130. An end of the first casing 130 away from the second casing 140 is connected to the driving device. 400 connection, the inlet 110 is opened on the second casing 140, and the outlet 120 is opened on the first casing 130.
  • the driving device 400 includes a pump housing 410 , a rotating shaft 420 , a stator 430 , a rotor 440 and wires 450 .
  • the rotating shaft 420 is rotatably installed in the pump casing 410; the stator 430 and the rotor 440 are both accommodated in the pump casing 410; the rotor 440 is fixedly connected to the rotating shaft 420; at least a part of the wire 450 is received in the pump casing 410, and the wire 450 is connected to the stator 430.
  • the stator 430 can drive the rotor 440 to rotate, the rotor 440 can drive the rotating shaft 420 to rotate, and the impeller 200 can rotate with the rotating shaft 420.
  • the stator 430 is received in the accommodation cavity 412 .
  • the stator 430 includes a first stator unit 432 and a second stator unit 433. Both the first stator unit 432 and the second stator unit 433 can drive the rotor 440 to rotate.
  • the first stator unit 432 and the second stator unit 433 are spaced apart along the extension direction of the rotation shaft 420 .
  • Both the first stator unit 432 and the second stator unit 433 are fixedly connected to the pump housing 410 .
  • the rotating shaft 420 is rotatably inserted through the first stator unit 432 . That is, the rotating shaft 420 is rotatable relative to the pump housing 410 , but the first stator unit 432 and the second stator unit 433 are non-rotatable relative to the pump housing 410 .
  • the structure of the second stator unit 433 is similar to that of the first stator unit 432 .
  • the second stator unit 433 includes a second magnetic core 4331, a second coil 4332 and a second back plate 4333.
  • the second backing plate 4333 is fixed to the pump housing 410 .
  • Second core There are a plurality of second magnetic cores 4331, and a plurality of second magnetic cores 4331 are arranged at intervals along a circumference. Specifically, the extension direction of each second magnetic core 4331 is parallel to the axis of the rotating shaft 420 .
  • Each second magnetic core 4331 is fixedly connected to the second back plate 4333.
  • the second coil 4332 is wound around the second magnetic core 4331. In the illustrated embodiment, each second magnetic core 4331 is wound with a second coil 4332 .
  • the rotating shaft 420 in the extending direction of the rotating shaft 420 , the rotating shaft 420 is spaced apart from the second stator unit 433 , that is, the end of the rotating shaft 420 away from the impeller 200 is spaced apart from the second stator unit 433 , that is, the rotating shaft 420 is not Penetrating into the second stator unit 433 , in other words, in the extending direction of the rotating shaft 420 , one end of the rotating shaft 420 away from the connecting end 421 is spaced apart from the second stator unit 433 .
  • the cross-sectional area of the magnetic columns of the second stator unit 433 is larger than the cross-sectional area of the magnetic columns of the first stator unit 432 .
  • both the first magnetic core 4321 and the second magnetic core 4331 only include magnetic columns, the magnetic columns of the first stator unit 432 are the first magnetic core 4321, and the second stator unit 433
  • the magnetic column is the second magnetic core 4331.
  • the rotating shaft 420 can also penetrate into the second stator unit 433.
  • the cross-sectional areas of the magnetic columns of the first stator unit 432 and the second stator unit 433 are the same.
  • the driving device 400 also includes a positioning piece 460.
  • the positioning piece 460 is fixed in the pump housing 410.
  • the positioning piece 460 has a bearing surface 462 and a positioning post 464.
  • One end of the positioning post 464 is fixed to the bearing surface 462.
  • On the top the other end of the positioning post 464 protrudes to a certain height relative to the bearing surface 462 , that is, the positioning post 464 is protrudingly disposed on the bearing surface 462 .
  • the second back plate 4333 of the second stator unit 433 is provided with a positioning hole 4334.
  • the positioning post 464 is inserted into the positioning hole 4334.
  • the second back plate 4333 is in contact with the bearing surface 462.
  • the positioning member 460 can perform the positioning function of the second stator unit 433 and improve the installation accuracy and efficiency of the second stator unit 433 .
  • the central axis of the positioning column 464 and the central axis of the second stator unit 433 coincide with each other.
  • the first stator unit 432 may not have the first back plate 4323, and the second stator unit 433 may not have the second back plate 4333, or the first stator unit 432 may not have the second back plate 4333.
  • One of the second stator units 433 has a back plate, and the other does not have a back plate. If the second stator unit 433 does not have the second back plate 4333, a plurality of positioning holes can be directly opened on the positioning member 460, and one ends of the plurality of second magnetic cores 4331 are respectively positioned in the plurality of positioning holes.
  • the positioning member 460 can be omitted.
  • a latching position for engaging with the edge of the second back plate 4333 can be provided in the pump housing 410 to engage with the second back plate 4333 through the latching position.
  • the second stator unit 433 is fixed; or the second stator unit 433 is bonded and fixed to the pump shell 410 through adhesive.
  • the first stator unit 432 can be bonded and fixed with the pump housing 410 through adhesive, or can be fixed by setting corresponding clamping positions in the pump housing 410 to engage with the first back plate 4323 . .
  • the rotor 440 is received in the accommodation cavity 412 of the pump housing 410 .
  • the rotor 440 includes a first magnet 442 and a second magnet 443.
  • the first magnet 442 and the second magnet 443 are both fixed to the rotating shaft 420.
  • the second magnet 443 is located between the first stator unit 432 and the second stator unit 433.
  • the first stator unit 432 can generate a rotating magnetic field that drives the first magnet 442 to rotate
  • the second stator unit 433 can generate a rotating magnetic field that drives the second magnet 443 to rotate.
  • the two stator units respectively provide torque to the rotor 440 through two magnets, which can increase the driving force for the rotation of the rotor 440.
  • the first magnet 442 and the second magnet 443 are both located between the first stator unit 432 and the second stator unit 433 , that is, along the extension direction of the rotation axis 420 , the first stator unit 432 and the second stator unit 433 are A magnet 442, a second magnet 443 and a second stator unit 433 are arranged in sequence.
  • the rotor 440 also includes a flywheel 444, which is fixed to the rotating shaft 420.
  • the flywheel 444 is located between the first stator unit 432 and the second stator unit 433.
  • the first magnet 442 and the second magnet 443 are both fixed to the flywheel. 444. More specifically, the flywheel 444 is fixed to an end of the rotating shaft 420 away from the connecting end 421 .
  • the connection strength between the first magnet 442 and the second magnet 443 and the rotating shaft 420 can be enhanced; in addition, by arranging the first magnet 442 and the second magnet 443 on the same flywheel 444, the rotation of the rotating shaft 420 can be reduced. The shaking during the process makes the rotating shaft 420 more stable during the rotation.
  • the flywheel 444 includes an inner tube 4442 , a disc-shaped portion 4444 and an outer ring wall 4446 .
  • Both the built-in tube 4442 and the outer annular wall 4446 have a circular tube structure, and the disc portion 4444 has an annular disc structure.
  • the built-in tube 4442 and the outer ring wall 4446 are both fixedly connected to the disc-shaped portion 4444.
  • the outer ring wall 4446 is arranged around the disc-shaped portion 4444.
  • the inner tube 4442 and the outer ring wall 4446 are arranged coaxially.
  • the rotating shaft 420 is inserted into the inner tube 4442 and is fixedly connected to the inner tube 4442.
  • An accommodating space is formed between the built-in tube 4442 and the outer ring wall 4446, and the disc-shaped portion 4444 divides the accommodating space into two installation cavities 4448.
  • the two installation cavities 4448 are both annular cavities.
  • the first magnet 442 and the second magnet 443 are respectively accommodated in two installation cavities 4448.
  • the first magnet 442 and the second magnet 443 are both annular, and the shapes of the two installation cavities 4448 are respectively adapted to the first magnet 442 and the second magnet 443 to facilitate the installation and positioning of the first magnet 442 and the second magnet 443.
  • Such an arrangement enables the flywheel 444 to limit the first magnet 442 and the second magnet 443, not only This facilitates the installation of the first magnet 442 and the second magnet 443, and also makes the combination of the first magnet 442, the second magnet 443 and the flywheel 444 more stable.
  • the flywheel 444 is not limited to the above structure. In some embodiments, the flywheel 444 does not have an outer ring wall 4446; in some embodiments, the flywheel 444 does not have an outer ring wall 4446 and a built-in tube 4442. In this case, The rotating shaft 420 is fixedly inserted through the disc-shaped portion 4444, for example, the center of the disc-shaped portion 4444. Compared with the flywheel 444 having only the disc-shaped portion 4444, providing the built-in tube 4442 can connect the flywheel 444 and the rotating shaft 420 more stably.
  • both the first magnet 442 and the second magnet 443 are annular Halbach array magnets.
  • both the first magnet 442 and the second magnet 443 include a plurality of magnetic bodies, for example, the number of magnetic bodies is four, six, eight or ten, etc., each magnetic body is in the shape of a fan ring, and the first magnet is A plurality of magnetic bodies are arranged around the rotating shaft 420 to form a ring structure.
  • the plurality of magnetic bodies of the second magnet 443 are arranged around the rotating shaft 420 to form a ring structure.
  • the first magnet 442 has a first magnetic body 4422 that is magnetized along the axial direction of the first magnet 442, and the second magnet 443 has a second magnetic body 4432 that is magnetized along the axial direction of the second magnet 443.
  • the magnetic body 4422 and the second magnetic body 4432 are respectively disposed on opposite sides of the disc-shaped portion 4444, and the positions of the first magnetic body 4422 and the second magnetic body 4432 correspond to each other; in the extension direction of the rotating shaft 420, the first magnetic body 4422 and the second magnetic body 4432 are positioned correspondingly.
  • the magnetic body 4422 and the second magnetic body 4432 have opposite polarities on the side facing the disk-shaped portion 4444 .
  • Such an arrangement can facilitate the installation of the first magnet 442 and the second magnet 443 and prevent the first magnetic body 4422 and the second magnetic body 4432 corresponding to the positions of the first magnet 442 and the second magnet 443 at the disk-shaped portion 4444 from repelling each other.
  • This causes assembly difficulties.
  • the polarity of the side of the first magnetic body 4422 facing the disc-shaped portion 4444 is N pole
  • the polarity of the side of the second magnetic body 4432 facing the disc-shaped portion 4444 is S pole.
  • N pole and S pole The principle of mutual attraction of poles eliminates the interference of magnetic repulsion and improves the installation efficiency of the first magnet 442 and the second magnet 443 .
  • the flywheel 444 is also provided with a position for determining the installation position of the first magnetic body 4422 and a second magnetic body 4432.
  • the marking part 445 may be set as a groove, a scale line, a mark, or the like.
  • the marking portion 445 is provided on at least one of the built-in tube 4442, the disc-shaped portion 4444, and the outer ring wall 4446. Specifically, in the illustrated embodiment, identification portions 445 are provided on the end surfaces of both ends of the built-in tube 4442 .
  • one end of the wire 450 is connected to the first stator unit 432, and the other end is connected to the second stator unit 433.
  • both ends of the wire 450 are electrically connected to the first coil 4322 of the first stator unit 432 and the second coil 4223 of the second stator unit 433 respectively. It can be understood that the connection method of the first stator unit 432 and the second stator unit 433 is not limited to the above method.
  • one end of the wire 450 away from the first stator unit 432 extends from the pump housing 410 to the conduit 300 , and is connected to the external power supply device; the second stator unit 433 is connected to the external power supply device through other wires.
  • the wires 450 each have a section corresponding to the position of the rotor 440.
  • the section of the wire 450 corresponding to the position of the rotor 440 is defined as an isolation section 452.
  • the shell wall of the pump housing 410 is also provided with first and second wire passing holes 413 and 414 at intervals.
  • the first and second wire passing holes 413 and 414 are both connected with each other.
  • the accommodating cavities 412 are connected.
  • the wire 450 passes through the first wire hole 413 and the second wire hole 414 , the isolation section 452 is located between the first wire hole 413 and the second wire hole 414 , and the isolation section 452 is located outside the accommodation cavity 412 .
  • the connecting position 415 defines an area on the wall of the pump housing 410, and the first wire hole 413, the second wire hole 414 and the isolation section 452 are located in this area surrounded by the connecting position 415.
  • the cover 470 and the connection position 415 are connected by welding.
  • Position 415 is kept at a certain distance to avoid damage to the wire 450 due to heat generated during the process of connecting the cover 470 to the pump housing 410, such as high temperature damage to the insulation layer of the wire 450; at the same time, the first wire hole 413 and The second wire passing holes 414 are all spaced apart from the connection position 415 by a certain distance, which can also reduce the heat generated during the installation of the cover 470 to the pump housing 410 from entering the accommodation from the first wire passing hole 413 and the second wire passing hole 414. inside the cavity 412, thereby reducing the damage caused by heat to the components in the accommodation cavity 412 when the cover 470 is installed, such as damage to the coil insulation layer, such as the impact on the magnetism of magnetic components. Therefore, in the above manner, It can improve the yield rate and reduce blood pump failures.
  • the first wire passing holes 413 and the second wire passing holes 414 are arranged at intervals along the axial direction of the pump housing 410 .
  • the first wire passing hole 413 is closer to the connecting end 421 of the rotating shaft 420 than the second wire passing hole 414 .
  • the widths of the first wire passing hole 413 and the second wire passing hole 414 are both smaller than the width of the bottom wall 416a of the sinking groove 416; in the axial direction of the pump housing 410, the first wire passing hole 413
  • the maximum distance from the side away from each other of the second wire hole 414 is less than the width of the bottom wall 416a of the sinking groove 416, so that the first wire passing hole 413 and the second wire passing hole 414 are both in contact with the bottom wall of the sinking groove 416.
  • the boundaries of 416a are spaced apart.
  • a distal isolation portion 417a is formed between the first wire passage hole 413 and the distal boundary of the bottom wall 416a of the sinking groove 416, and the second wire passing hole 414 is connected to the bottom wall 416a of the sinking groove 416.
  • a proximal isolation portion 417b is formed between the proximal boundaries of the wall 416a; in the circumferential direction of the pump housing 410, a first side isolation portion is formed between the first line passing hole 413 and the two side boundaries of the bottom wall 416a of the sinking groove 416.
  • the blocking portion 417g is located between the isolation section 452 of the conductor 450 and the rotor 440.
  • the side of the pump casing 410 close to the impeller 200 is defined as the distal end, and the end of the pump casing 410 far away from the impeller 200 is defined as the proximal end.
  • the distal boundary of the bottom wall 416a of the sink 416 is the boundary of the side of the bottom wall 416a close to the impeller 200
  • the proximal boundary of the bottom wall 416a of the sink 416 is the side of the bottom wall 416a away from the impeller 200. border.
  • the direction in which the pump casing 410 goes around the rotation axis 420 is defined as the circumferential direction of the pump casing 410 .
  • the pump housing 410 includes a first housing 418 and a second housing 419 connected to the first housing 418.
  • the second housing 419 and the first housing 418 are butt-joined to jointly enclose A receiving cavity 412 is provided.
  • the first housing 418 is closer to the connecting end 421 of the rotating shaft 420 than the second housing 419 .
  • a part of the sink 416 is located on the second housing 419 and a part is located on the first housing 418 .
  • the second wire passing hole 414 is located on the second housing 419.
  • a notch 419a is formed on the second housing 419.
  • the notch 419a is at least a part of the first wire passing hole 413.
  • the wires can be facilitated during assembly.
  • 450 is inserted into the first wire passing hole 413, especially for the first wire passing hole 413 with a smaller hole diameter, to improve the assembly efficiency.
  • the first stator unit 432 is accommodated in the first housing 418
  • the second stator unit 433 and the rotor 440 are accommodated in the second housing 419.
  • the distal isolation portion 417a is located on the first housing 418; the proximal isolation portion 417b, the first side isolation portion 417c, the second side isolation portion 417d, the third side isolation portion 417e, and the fourth side isolation portion 417e.
  • the side isolation portion 417f and the barrier portion 417g are both located on the second housing 419.
  • a step portion 419b is provided on the inner wall of the second housing 419 close to the first housing 418.
  • the first housing 418 includes a first section 418a and a second section 418b arranged coaxially.
  • the outer surface of the first section 418a The diameter is smaller than the outer diameter of the second section 418b.
  • the first section 418a is inserted in the second housing 419, and the end surface of the end of the first section 418a away from the second section 418b is in contact with the step portion of the second housing 419. 419b abuts, and the second section 418b is located outside the second housing 419 .
  • the pump housing 410 is not limited to being separate. In some embodiments, the pump housing 410 may be integrally formed.
  • the first wire hole 413 and/or the second wire hole 414 are not limited to the above-mentioned manner.
  • the first wire hole 413 can be completely provided on the first housing 418 or the second housing 419 ;
  • the end of the second housing 419 close to the first housing 418 is also provided with a notch, the position of the notch of the second housing 419 corresponds to the position of the notch on the first housing 418, and the third The notch in the second housing 419 and the notch in the first housing 418 together form a first wire hole 413; in some embodiments, an end of the first housing 418 close to the end of the second housing 419 is provided with a The second housing 419 does not have a gap. After the first housing 418 and the second housing 419 are butted, a second wire passing hole 414 is formed at the gap position.
  • the cover 470 is shaped and sized to fit the sink 416 .
  • the outer surface of the cover 470 is flush with the outer surface of the pump housing 410 , so that the arrangement of the cover 470 does not increase the local outer diameter of the pump housing 410 .
  • the cover 470 is generally in the shape of an arc plate, and the outer peripheral side surface of the pump housing 410 and the outer surface of the cover 470 smoothly transition.
  • the edge of the cover 470 is in contact with the edge of the bottom wall 416a of the sink 416, so that the bottom wall 416a can support the cover 470 when the cover 470 is installed, so as to facilitate the installation of the cover 470 to the pump. on the shell 410. More specifically, the cover 470 abuts against the proximal isolation portion 417b, the distal isolation portion 417a, the first side isolation portion 417c, the second side isolation portion 417d, the third side isolation portion 417e, and the fourth side of the bottom wall 416a.
  • the isolation portion 417f and the barrier portion 417g are provided along both sides of the pump housing 410 in the circumferential direction.
  • the hole wall on the side of at least one of the first wire passing hole 413 and the second wire passing hole 414 close to the other is an arc wall, and the arc wall is a concave wall.
  • This arrangement can reduce the number of first wire passing holes.
  • the hole wall 413a on the side of the first wire hole 413 close to the second wire hole 414 is an arc-shaped wall.
  • the width of the first wire passing hole 413 is smaller than the width of the second wire passing hole 414.
  • the smaller first wire hole 413 can collect and concentrate the isolation sections 452 of the multiple wires 450, and the larger second wire hole 414 can facilitate the separation of the wires 450.
  • the wires enter the accommodating cavity 412 so that the routing of the wires 450 can be reasonably arranged.
  • the width of the limiting groove 416 is also smaller than the width of the area surrounded by the connecting bit 415 .
  • the connection position 415 is arranged around the first wire hole 413, the second wire hole 414 and the limiting groove 416d; the cover 470 also completely covers the limiting groove 416d.
  • at least part of the isolation section 452 of the conductor 450 is limited to the limiting groove 416d.
  • the limiting groove 416d has a limiting effect on the isolation section 452 of the wire 450.
  • the wires 450 between the holes 414 are limited to prevent the wires 450 from being scattered or moved and causing inconvenience in the installation of the cover 470, or to prevent the first wire passing hole 413 and the second wire passing hole 414 from being inconvenient when installing the cover 470.
  • the wire 450 moves to the connection point (ie, the connection position 415) between the cover 470 and the pump housing 410, thereby further ensuring that the isolation section 452 of the wire 450 can stay away from the connection position 415 of the pump housing 410 that is connected to the cover 470.
  • the extension direction of the limiting groove 416b is consistent with the axial direction of the pump housing 410.
  • the width of the limiting groove 416d is greater than or equal to the width of the first wire passing hole 413, but smaller than the width of the second wire passing hole 414, so that the isolation section 452 of the conductor 450 can be collected into the limiting groove. 416d, at the same time, it is convenient for the conductor 450 to be routed separately from the second conductor hole 414 and enter the accommodating cavity 412.
  • one end of the limiting groove 416d is connected to the first wire passing hole 413, and the other end is connected to the second wire passing hole 414, so that the hole wall on the side of the first wire passing hole 413 close to the limiting groove 416d is in contact with each other.
  • the surface of the bottom wall 416a facing the cover 470 is concave, and the hole wall of the second wire passage hole 414 on the side close to the limiting groove 416d is also concave compared with the surface of the bottom wall 416a facing the cover 470.
  • the limiting groove 416d in the circumferential direction of the pump housing 410, has a middle portion 416e with a larger depression depth and two side portions 416f located on both sides of the middle portion 416e and with a smaller depression depth.
  • the thickness of the shell wall of the pump shell 410 at the middle portion 416e of the limiting groove 416d is smaller than the thickness of the shell wall of the pump shell 410 at the two side portions 416f of the limiting groove 416d.
  • each side portion 416f has a depth of the depression of each side portion 416f relative to the side of the bottom wall 416a facing the cover 470 gradually decreases in the direction away from the middle portion 416e, that is, in the direction away from the middle portion 416e, the shell wall of the pump housing 410 is at each side portion.
  • the thickness of 416f gradually increases. This method can facilitate the processing and molding of the pump casing 410 and improve the yield of the pump casing 410.
  • the groove wall of the side portion 416f of the limiting groove 416d is an arc-shaped wall to reduce damage to the conductor 450.
  • the width of the middle portion 416e of the limiting groove 416d is greater than or equal to the width of the isolation sections 452 of the plurality of conductors 450 connected to the first stator unit that are arranged in parallel in order to reduce the depth of the limiting groove 416d as much as possible. , so that the shell wall of the pump shell 410 can have the largest possible thickness at the position corresponding to the limiting groove 416d, so that the pump shell 410 has as much strength as possible.
  • the sinking groove 416 may not be provided on the wall of the pump housing 410, and the limiting groove 416d is directly provided on the outside of the wall of the pump housing 410.
  • the limiting groove 416d may be a pump
  • the outer surface of the shell wall of the shell 410 is partially recessed.
  • the groove wall of the limiting groove 416d is located between the rotor 440 and the isolation section 452 to separate the isolation section 452 of the wire 450 from the rotor 440.
  • the cover 470 is connected to the pump shell 410.
  • connection position 415 is arranged around the first wire passing hole 413, the second wire passing hole 414 and the limiting groove 416d, and the first The wire passing hole 413, the second wire passing hole 414 and the limiting groove 416d are all spaced apart from the connection position 415 by a certain distance to avoid damage to the wire 450 caused by the heat generated during the process of connecting the cover 470 to the pump housing 410.
  • the Both the first wire passing hole 413 and the second wire passing hole 414 are spaced apart from the connection position 415 by a certain distance, which can also reduce the heat generated during the installation of the cover 470 to the pump housing 410 from the first wire passing hole 413 and the second wire passing hole 414 .
  • the wire hole 414 enters the interior of the accommodating cavity 412, thereby reducing damage caused by heat to the components in the accommodating cavity 412 when the cover 470 is installed, such as damage to the coil insulation layer, such as damage to the magnetic components of the magnetic components. In order to improve the yield rate of the driving device 400 and reduce failures.
  • the driving device 400 also includes a sleeve assembly 480.
  • the sleeve assembly 480 is fixed in the pump housing 410.
  • the sleeve assembly 480 is located between the first stator unit 432 and the impeller 200.
  • the rotating shaft 420 can Rotated through the sleeve assembly 480.
  • By arranging the sleeve assembly 480 it can play a radial limiting role on the rotating shaft 420, reduce the radial shaking of the rotating shaft 420 during the rotation process, and improve the stability of the rotation of the rotating shaft 420.
  • the shaft sleeve assembly 480 can be formed in one piece or separately.
  • the pump housing 410 also has a third housing 405, which is docked with an end of the first housing 418 away from the second housing 419, and the shaft sleeve assembly 410 is fixedly received in the third housing 405. Inside the three shells 405.
  • the sleeve assembly 480 includes a first sleeve 482 and a second sleeve 484.
  • the first sleeve 482 and the second sleeve 484 are both fixedly connected to the pump housing 410, and the rotating shaft 420 can rotate through it. It is provided on the first sleeve 482 and the second sleeve 484.
  • the first sleeve 482 is closer to the impeller 200 than the second sleeve 484.
  • the first sleeve 482 is provided with a first through hole 4821 and a limit hole 4823.
  • the first through hole 4821 and the limit hole 4823 are connected to each other and are coaxially arranged.
  • the aperture of the limit hole 4823 is larger than that of the first through hole 4821 and the limit hole 4823.
  • the diameter of the through hole 4821 is such that the first through hole 4821 and the limiting hole 4823 together form a step hole.
  • the first sleeve 482 has a first limiting surface 4825 that defines a partial boundary of the limiting hole 4823 .
  • the second sleeve 484 includes a thick section 4841 and a thin section 4843.
  • the cross section of the thin section 4843 is smaller than the cross section of the thick section 4841.
  • the thick section 4841 has a contact surface 4845.
  • the thin section 4843 is protruding from the contact surface 4845.
  • the second sleeve 484 has a second through hole 4846 that extends from the end surface of the thin section 4843 away from the abutment surface 4845 to the side of the thick section 4841 away from the abutment surface 4845, so that the second through hole 4846 It runs through the thick section 4841 and the thin section 4843.
  • the thin section 4843 is inserted into the limiting hole 4823, and the contact surface 4845 is in contact with the first sleeve 482.
  • the end surface of the thin section 4843 away from the abutment surface 4845 is the second limiting surface 4847.
  • the second limiting surface 4847 and the first limiting surface 4825 are spaced apart and opposite.
  • the hole wall of the limiting hole 4823, the first limiting surface 4825, and the second limiting surface 4847 jointly define a limiting cavity 486.
  • the first through hole 4821 and the second through hole 4846 are both connected to the limiting chamber 486.
  • the rotating shaft 420 includes a straight shaft portion 422 and a convex ring portion 424.
  • the convex ring portion 424 is fixedly sleeved on the straight shaft portion 422.
  • the outer diameter of the convex ring portion 424 is larger than the diameter of the straight shaft portion 422.
  • the straight shaft portion 422 passes through the first through hole 4821 and the second through hole 4846.
  • the convex ring portion 424 is received in the limiting cavity 486.
  • the outer diameter of the convex ring portion 424 is larger than the aperture of the first through hole 4821, and the convex ring portion 424 is The outer diameter is larger than the hole diameter of the second through hole 4846.
  • the straight shaft portion 422 can rotate through the first stator unit 432 , and the rotor 440 is fixed to the straight shaft portion 422 .
  • the connecting end 421 is one end of the straight shaft portion 422 .
  • the convex ring portion 424 is located between the first limiting surface 4825 and the second limiting surface 4847 .
  • the flange portion 424 can contact the first limiting surface 4825 and the second limiting surface 4847 to position the rotating shaft 420 in the axial direction of the pump housing 410 and prevent the rotating shaft 420 from moving in the axial direction of the pump housing 410 Or limit the movement range of the rotating shaft 420 in the axial direction of the pump housing 410 .
  • the convex ring portion 424 is always in contact with the first limiting surface 4825 and the second limiting surface 4847; in some embodiments, the gap between the first limiting surface 4825 and the second limiting surface 4847 is The spacing is slightly larger than the axial height of the convex ring portion 424, so that during the rotation of the rotating shaft 420, the convex ring portion 424 has a certain floating space between the first limiting surface 4825 and the second limiting surface 4847. For cleaning fluid to flow.
  • a first gap for the flow of cleaning fluid is formed between the straight axis portion 422 and the hole wall of the first through hole 4821, and a second gap for the flow of cleaning fluid is formed between the straight axis portion 422 and the hole wall of the second through hole 4846.
  • a third gap 487 is formed between the flange portion 424 and the cavity wall of the limiting cavity 486 for the cleaning fluid to flow.
  • the pump housing 410 is also provided with a load-bearing protrusion 410a, which is annular in shape.
  • the bearing protrusion 410a plays a role in limiting the entire shaft sleeve assembly 480 in the axial direction of the pump housing 410.
  • the bearing protrusion 410a is located on the third housing 405; the first back plate 4323 of the first stator unit 432 is fixedly connected to the third housing 405.
  • the driving device 400 is not limited to the above structure.
  • the rotor 440 is still located between the first stator unit 432 and the second stator unit 433.
  • the rotor 440 has two fixedly connected to the rotating shaft 420. Flywheel, the first magnet 442 and the second magnet 443 are respectively installed on the two flywheels;
  • the first magnet 442 , the first stator unit 432 , the second stator unit 433 and the second magnet 443 are arranged in sequence along the extension direction of the rotating shaft 420 , and the rotating shaft 420 can rotate through the first stator unit. 432 and the second stator unit 433, the first magnet 442 is close to the connecting end 421 of the rotating shaft 420.
  • there are multiple wires 450 some of the wires 450 are connected to the first stator unit 432, and some of the wires 450 are connected to the second stator unit 433.
  • each conductor 450 has an isolation section 452, and the positions of the isolation sections 452 of the plurality of conductors 450 correspond to the position of the second magnet 443.
  • the plurality of conductors 450 are passed through the first wire hole 413 and The second wire through hole 414 is so that the isolation section 452 of each wire 450 is located outside the accommodating cavity 412; or, the first stator unit 432 and the second stator unit 433 are connected through other wires, and the wires 450 are connected to the first stator unit 433.
  • the stator unit 432 is connected to one of the second stator units 433;
  • the first stator unit 432 , the first magnet 442 , the second stator unit 433 and the second magnet 443 are arranged in sequence along the extension direction of the rotating shaft 420 , and the first stator unit 432 is close to the connecting end 421 of the rotating shaft 420 , at this time, the pump housing 410 may be provided with first wire passing holes 413 and second wire passing holes 414 at positions corresponding to the first magnet 442 and the second magnet 443, respectively, to isolate the isolation section 452 of the wire 450.
  • the rotor 440 has only one magnet. At this time, the first stator unit 432 and the second stator unit 433 share a magnet, and the rotor 440 is still located between the first stator unit 432 and the second stator unit 433 ;
  • the stator 420 has only one stator unit. At this time, if the impeller 200, the stator 430 and the rotor 440 are arranged in sequence along the extension direction of the rotating shaft 420, the wire 450 is connected to the stator 430.
  • the driving device of this embodiment has a similar structure to the driving device of the first embodiment, the driving device of this embodiment and the blood pump having the driving device of this embodiment also have similar effects to the first embodiment.

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Abstract

一种驱动装置(400)和血泵(10)，驱动装置(400)包括泵壳(410)、定子(430)、转子(440)、导线(450)和盖体(470)；泵壳(410)具有第一过线孔(413)、第二过线孔(414)和限位槽(416d)，限位槽(416d)位于泵壳(410)的壳壁外侧，导线(450)穿设于第一过线孔(413)和第二过线孔(414)，导线(450)具有与转子(440)的位置相对应的隔离段(452)，隔离段(452)位于第一过线孔(413)和第二过线孔(414)之间，隔离段(452)至少部分被限制于限位槽(416d)中，盖体(470)遮盖第一过线孔(413)、第二过线孔(414)、限位槽(416d)和隔离段(452)。

Description

驱动装置和血泵
本申请要求于2022年06月10日在中国专利局提交的、申请号为CN202210654824.5、CN202210654851.2的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及医疗器械技术领域，特别是涉及一种驱动装置和血泵。
背景技术
血管内血泵是一种可以经由患者血管探入患者心脏的泵血装置，血管内血泵置于心脏瓣膜的开口内，以便血液能够流经血泵并进入至动脉血管内。但是，传统的血泵存在故障率较高的问题。
发明内容
基于此，本申请提供了一种驱动装置和血泵，可以降低血泵的故障率。
本申请第一方面的实施例提供了一种驱动装置，用于驱动叶轮转动，所述驱动装置包括：
泵壳，具有容置腔，所述泵壳的壳壁上还开设有第一过线孔、第二过线孔和限位槽，所述第二过线孔与所述第一过线孔均与所述容置腔连通，所述第二过线孔和所述第一过线孔间隔，所述限位槽位于所述泵壳的壳壁外侧，且所述限位槽位于所述第一过线孔和所述第二过线孔之间；
用于与所述叶轮连接的转轴，所述转轴能够转动地安装于所述泵壳；
转子，能够转动地收容于所述容置腔，所述转子固接于所述转轴，所述转子能够带动转轴转动；
定子，收容于所述容置腔，所述定子能够驱动所述转子转动；
导线，与所述定子连接，所述导线穿设于所述第一过线孔和所述第二过线孔，所述导线具有与所述转子的位置相对应的隔离段，所述隔离段位于所述第一过线孔和所述第二过线孔之间，所述隔离段至少部分被限制于所述限位槽中，所述限位槽的槽壁位于所述转子和所述隔离段之间；及
盖体，连接于所述泵壳上，并完全遮盖所述第一过线孔、所述第二过线孔、所述限位槽和所述隔离段。
本申请第二方面的实施例提供了一种血泵，包括叶轮和驱动装置，驱动装置用于驱动叶轮转动，所述驱动装置包括：
泵壳，具有容置腔，所述泵壳的壳壁上还开设有第一过线孔、第二过线孔和限位槽，所述第二过线孔与所述第一过线孔均与所述容置腔连通，所述第二过线孔和所述第一过线孔间隔，所述限位槽位于所述泵壳的壳壁外侧，且所述限位槽位于所述第一过线孔和所述第二过线孔之间；
用于与所述叶轮连接的转轴，所述转轴能够转动地安装于所述泵壳；
转子，能够转动地收容于所述容置腔，所述转子固接于所述转轴，所述转子能够带动转轴转动；
定子，收容于所述容置腔，所述定子能够驱动所述转子转动；
导线，与所述定子连接，所述导线穿设于所述第一过线孔和所述第二过线孔，所述导线具有与所述转子的位置相对应的隔离段，所述隔离段位于所述第一过线孔和所述第二过线孔之间，所述隔离段至少部分被限制于所述限位槽中，所述限位槽的槽壁 位于所述转子和所述隔离段之间；及
盖体，连接于所述泵壳上，并完全遮盖所述第一过线孔、所述第二过线孔、所述限位槽和所述隔离段；
其中，所述叶轮固接于所述转轴，所述叶轮能够随所述转轴转动。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为一实施例提供的血泵的立体结构示意图；
图2为图1所示血泵省略除导管和部分套管组件后的平面结构示意图；
图3为图2在第一方向的剖视结构示意图；
图4为图2在第二方向的剖视结构示意图；
图5为图1所示的血泵的驱动装置中的第一定子单元的立体结构示意图；
图6为图5所示的第一定子单元的另一角度的示意图；
图7为图1所示的血泵的驱动装置中的转子的结构示意图；
图8为图7所示的转子的剖视图；
图9为图7所示的转子的分解结构示意图；
图10为图2完全省略套管组件后的立体分解图；
图11为图2完全省略套管组件后的另一立体分解图；
图12为图2完全省略套管组件后的另一立体分解图；
图13为图1的血泵的驱动装置的泵壳的剖视图；
图14为图1的血泵的驱动装置的泵壳的分解图；
图15为图14所示的泵壳的第二壳体的结构示意图；
图16为图3所示的血泵的轴套组件的第一轴套的立体结构示意图；
图17为图3所示的血泵的轴套组件的第二轴套的立体结构示意图；
图18为图3所示的血泵的轴套组件的剖视图；
图19为图4所示的血泵的A部的放大图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图即实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
为了说明本申请的技术方案，下面结合具体附图及实施例来进行说明。
在本文中，定义“近端”为靠近操作者的一端；定义“远端”为远离操作者的一端。
参阅图1和图2，本申请一实施例提供的血泵10包括套管组件100、叶轮200、导管300和驱动装置400，套管组件100与驱动装置400的一端连接，导管300与驱动装置400的另一端连接，叶轮200能够转动地设置在套管组件100内，叶轮200与驱动装置400连接，驱动装置400能够驱动叶轮200转动，以实现血泵10的泵血功能。
具体地，套管组件100具有入口110和出口120。其中，出口120较入口110更靠近驱动装置400。在其中一个实施例中，套管组件100延伸穿过心脏瓣膜，诸如主动脉瓣膜，而入口110位于心脏内，出口120和驱动装置400位于心脏外的诸如主动脉的血管中。当叶轮200旋转时，血液从入口110流入套管组件100中，再从出口120流出套管组件100。
在图示的实施例中，套管组件100包括第一套管130及与第一套管130连接的第二套管140，第一套管130的远离第二套管140的一端与驱动装置400连接，入口110开设于第二套管140，出口120开设于第一套管130上。
叶轮200的位置大致与出口120的位置相对应。具体地，叶轮200位于第一套管130内。
导管300与驱动装置400的远离套管组件100的一端对接。导管300用于容置各种供应管线，供应管线例如可以为用于给驱动装置400内通入清洗液的清洗管线，又例如给驱动装置400供电的导线，再例如用于支撑导管300的支撑部件等等。
请参阅图3-图4，驱动装置400包括泵壳410、转轴420、定子430、转子440和导线450。其中，转轴420能够转动地安装于泵壳410；定子430和转子440均收容于泵壳410；转子440与转轴420固接；导线450的至少一部分收容于泵壳410，导线450与定子430连接，以给定子430供电。其中，定子430能够驱动转子440转动，转子440能够带动转轴420旋转，叶轮200能够随转轴420转动。
在一些实施例中，泵壳410大致为横截面为圆形的筒状。泵壳410具有容置腔412。
转轴420的一端收容于容置腔412内，另一端延伸出泵壳410而与叶轮200固接。转轴420的延伸方向与泵壳410的轴向一致。转轴420用于与叶轮200连接的一端为连接端421。其中，转轴420可以采用陶瓷或不锈钢等材料制造，例如陶瓷为氧化铝增韧氧化锆(ATZ)陶瓷，不锈钢为SUS316L，如此将提高转轴420的抗扭强度，避免转轴420因扭矩过大而产生断裂。
定子430收容于容置腔412内。在图示的实施例中，定子430包括第一定子单元432和第二定子单元433，第一定子单元432和第二定子单元433均能够驱动转子440转动。具体地，第一定子单元432和第二定子单元433沿转轴420的延伸方向间隔设置。第一定子单元432和第二定子单元433均与泵壳410固接。转轴420能够转动地穿设于第一定子单元432。即转轴420相对泵壳410是可转动的，而第一定子单元432和第二定子单元433相对于泵壳410是不可转动的。
其中，第一定子单元432和第二定子单元433可以并联，也可以串联。在一些实施例中，第一定子单元432和第二定子单元433能够同步驱动转子440转动。第一定子单元432和第二定子单元433能够共同驱动转子440转动，也可以单独驱动转子440转动。
在一些实施例中，转子440具有磁性，定子430能够产生驱动转子440转动的旋转磁场。具体地，第一定子单元432和第二定子单元433均能够产生驱动转子440转动的旋转磁场。
具体地，第一定子单元432包括第一磁芯4321、第一线圈4322和第一背板4323。第一背板4323固接于泵壳410。第一磁芯4321为多个，多个第一磁芯4321沿一圆周间隔设置。具体地，每个第一磁芯4321的延伸方向均与转轴420的延伸方向一致。每个第一磁芯4321与第一背板4323固接。第一线圈4322缠绕于第一磁芯4321。在图示的实施例中，每个第一磁芯4321上缠绕有第一线圈4322。
第二定子单元433的结构与第一定子单元432的结构类似。第二定子单元433包括第二磁芯4331、第二线圈4332和第二背板4333。第二背板4333固接于泵壳410。第二磁芯 4331为多个，多个第二磁芯4331沿一圆周间隔设置。具体地，每个第二磁芯4331的延伸方向均与转轴420的轴线平行。每个第二磁芯4331与第二背板4333固接。第二线圈4332缠绕于第二磁芯4331。在图示的实施例中，每个第二磁芯4331缠绕有第二线圈4332。
在一些实施例中，第一磁芯4321和第二磁芯4331均包括磁柱和设置在磁柱的一端的头部(即极靴)，磁柱的延伸方向与转轴的延伸方向一致。第一背板4323与第一磁芯4321的磁柱的远离头部的一端接合；第二背板4333与第二磁芯4331的磁柱的远离头部的一端结合。其中，在磁柱的延伸方向上，磁柱大致呈尺寸均匀的柱状体，即磁柱4331的横截面的尺寸保持恒定，通俗而言，磁柱4331粗细均匀。第一线圈4322缠绕于第一磁芯4321的磁柱上，第二线圈4332缠绕于第二磁芯4331的磁柱上。
请一并结合图5和图6，而在图示的实施例中，第一磁芯4321和第二磁芯4331均仅包括磁柱，即第一磁芯4321和第二磁芯4331均没有宽度较大的头部(即极靴)。此时，整个第一磁芯4321均能够与转子440进行磁耦合，整个第二磁芯4331均能够与转子440进行磁耦合，相较于具有极靴的磁芯，仅具有磁柱的磁芯一方面能够减少磁损耗，增加磁芯和转子之间的磁耦合密度，以在相同电流的情况下增大定子单元对转子的扭矩。另一方面，没有头部的磁芯还能够大大降低相邻磁芯之间因接触而产生的局部磁短路造成的驱动装置400功率下降的问题。
可以理解，第一磁芯4321和第二磁芯4331不限于上述两种方式，在一些实施例中，还可以是第一磁芯4321和第二磁芯4331中的一个同时具有磁柱和头部，另一个仅具有磁柱。
第一磁芯4321和第二磁芯4331的磁柱的横截面的形状可以为扇形、圆形、梯形、扇环形等等。在图示的实施例中，磁柱大致为三棱柱状，每个磁柱的一个棱边朝向转轴的轴线。在一些实施例中，磁柱的棱边均做了倒圆处理，即磁柱的棱边为相对圆滑和钝化的倒圆棱，从而以消除磁柱上的尖锐棱角，不仅能够方便后续线圈的缠绕，同时有利于保护线圈上包覆的绝缘材料。
在图示的实施例中，在转轴420的延伸方向上，转轴420与第二定子单元433间隔，即转轴420的远离叶轮200的一端与第二定子单元433间隔设置，也即，转轴420未穿入第二定子单元433内，或者说，在转轴420的延伸方向上，转轴420的远离连接端421的一端与第二定子单元433间隔。其中，第二定子单元433的磁柱的横截面积大于第一定子单元432的磁柱的横截面积。在图示的实施例中，由于第一磁芯4321和第二磁芯4331均仅包括磁柱，那么，第一定子单元432的磁柱即为第一磁芯4321，第二定子单元433的磁柱即为第二磁芯4331。
磁柱的横截面积越大，所产生的磁通量就越大，定子单元对转子440的扭矩就越大，所需电流越小，有利于降低功耗，减少发热。在第一定子单元432和第二定子单元433横截面尺寸相同，泵壳410外径保持不变的情况下，鉴于转轴420位于第二定子单元433之外，第二定子单元433中并未穿设有转轴420，可以通过不增加泵壳410外径的方式合理增大第二定子单元433的磁柱的横截面尺寸，如此可以增大第二定子单元433对转子440的驱动扭矩，在所需扭矩相同的情况下，此方式可以合理减少对定子线圈的电流供应，从而降低了功耗，同时还减少驱动装置400的发热量，避免血泵在工作过程中因热量聚集而产生温度过高而对人体造成不适甚至是伤害。
需要说明的是，在其它实施例中，转轴420也可以穿入至第二定子单元433内，此时，第一定子单元432和第二定子单元433的磁柱的横截面积相同。
第一背板4323和第二背板4333大致呈平板状结构。第一背板4323和第二背板4333采用与第一磁芯4321和第二磁芯4331相同的材料制成，例如钴钢等软磁性材料制成。
背板能够起到闭合定子单元的磁路的作用，以促进和增加定子单元磁通量的产生，提高定子单元和转子440之间耦合能力。换而言之，第一定子单元432中设置第一背板4323能够促进和增加第一定子单元432磁通量的产生，提高第一定子单元432和转子440之间 的耦合能力；第二定子单元433中设置第二背板4333能够促进和增加第二定子单元433磁通量的产生，提高第二定子单元433和转子440之间的耦合能力。由于背板能够增加磁通量，因此，在第一定子单元432和第二定子单元433中分别设置背板还有利于减小驱动装置400的整体直径。
请结合图3和图4，驱动装置400还包括定位件460，定位件460固接于泵壳410内，定位件460具有承载面462和定位柱464，定位柱464的一端固定于承载面462上，定位柱464的另一端相对承载面462凸出一定的高度，即定位柱464凸出设置在承载面462上。第二定子单元433的第二背板4333设有定位孔4334，定位柱464插置在定位孔4334中，第二背板4333与承载面462相抵接。如此可以使得定位件460发挥对第二定子单元433的定位功能，提高第二定子单元433的安装精度和安装效率。具体地，定位柱464的中心轴线与第二定子单元433的中心轴线相互重合。
定位件460上还开设有贯通孔466，贯通孔466可以用于与向驱动装置400内通入清洗液的清洗管线连通或者用于安装清洗管线。
需要说明的是，在一些实施例中，第一定子单元432也可以不具有第一背板4323，第二定子单元433也可以不具有第二背板4333，或者，第一定子单元432和第二定子单元433中的其中一个具有背板，另一个不具有背板。若第二定子单元433不具有第二背板4333，可以直接在定位件460上开设多个定位孔，多个第二磁芯4331的一端分别定位于多个定位孔。
在一些实施例中，定位件460可以省略，此时，可以在泵壳410内设置用于与第二背板4333的边缘卡合的卡位，以通过卡位与第二背板4333相卡合而实现第二定子单元433的固定；或者第二定子单元433通过粘结剂与泵壳410粘结固定。第一定子单元432可以通过粘结剂与泵壳410粘结固定，也可以通过在泵壳410内设置相应的卡位与第一背板4323卡合，实现第一定子单元432的固定。
转子440收容于泵壳410的容置腔412中。具体地，转子440包括第一磁体442和第二磁体443，第一磁体442和第二磁体443均固接于转轴420，第二磁体443位于第一定子单元432和第二定子单元433之间，第一定子单元432能够产生驱动第一磁体442转动的旋转磁场，第二定子单元433能够产生驱动第二磁体443转动的旋转磁场。两个定子单元分别通过两个磁体对转子440提供扭矩，可以增大对转子440转动的驱动力。
在图示的实施例中，第一磁体442和第二磁体443均位于第一定子单元432和第二定子单元433之间，即沿转轴420的延伸方向，第一定子单元432、第一磁体442、第二磁体443以及第二定子单元433依次排列。
具体地，转子440还包括飞轮444，飞轮444与转轴420固接，飞轮444位于第一定子单元432和第二定子单元433之间，第一磁体442和第二磁体443均固接于飞轮444。更具体地，飞轮444固接于转轴420的远离连接端421的一端。
通过设置飞轮444可以增强第一磁体442和第二磁体443与转轴420的连接强度；另外，通过将第一磁体442和第二磁体443均设置在同一个飞轮444上，能够减少转轴420在转动过程中的晃动，使转轴420在转动过程中更加稳定。
请结合图7-图9，在图示的实施例中，飞轮444包括内置管4442、盘状部4444和外环壁4446。内置管4442和外环壁4446两者均为圆管状结构，盘状部4444为环形圆盘结构。内置管4442和外环壁4446均与盘状部4444固接。外环壁4446环绕盘状部4444设置，内置管4442和外环壁4446两者同轴设置，转轴420穿设于内置管4442中、并与内置管4442固定连接。内置管4442和外环壁4446之间形成有容置空间，盘状部4444将该容置空间分隔为两个安装腔4448。两个安装腔4448均为环形腔。第一磁体442和第二磁体443分别容置在两个安装腔4448中。第一磁体442和第二磁体443均为环形，两个安装腔4448的形状分别与第一磁体442和第二磁体443相适配，以方便第一磁体442和第二磁体443安装和定位。如此设置能够使飞轮444对第一磁体442和第二磁体443起到限位作用，不仅 方便第一磁体442和第二磁体443的安装，而且也使得第一磁体442和第二磁体443和飞轮444结合更加稳固。
需要说明的是，飞轮444不限于为上述结构，在一些实施例中，飞轮444不具有外环壁4446；在一些实施例中，飞轮444不具有外环壁4446和内置管4442，此时，转轴420固定地穿设于盘状部4444，例如，盘状部4444的中心。相对于仅具有盘状部4444的飞轮444，设置内置管4442能够使飞轮444与转轴420更加稳定地连接。
在一些实施例中，第一磁体442和第二磁体443均为环状的海尔贝克阵列磁铁。具体地，第一磁体442和第二磁体443均包括多个磁性体，例如磁性体的数量为四个、六个、八个或十个等，每个磁性体呈扇环形，第一磁体的多个磁性体环绕转轴420设置一周以形成环形结构，第二磁体443的多个磁性体环绕转轴420设置一周以形成环形结构。
更具体地，第一磁体442具有沿第一磁体442的轴向充磁的第一磁性体4422，第二磁体443具有沿第二磁体443的轴向充磁的第二磁性体4432，第一磁性体4422和第二磁性体4432分别设置在盘状部4444的相背离的两侧，且第一磁性体4422和第二磁性体4432的位置相对应；在转轴420的延伸方向上，第一磁性体4422和第二磁性体4432的朝向盘状部4444的一侧的极性相反。如此设置可以方便第一磁体442和第二磁体443的安装，避免第一磁体442和第二磁体443的位于盘状部4444的位置相对应的第一磁性体4422和第二磁性体4432相互排斥而造成装配困难的问题。举例而言，第一磁性体4422朝向盘状部4444的一侧的极性为N极，则第二磁性体4432朝向盘状部4444的一侧的极性为S极，根据N极和S极相互吸引的原理，从而消除磁性斥力的干扰，提高第一磁体442和第二磁体443的安装效率。
为了方便第一磁体442和第二磁体443的安装，提高第一磁体442和第二磁体443的安装精度，飞轮444上还设有用于确定第一磁性体4422的安装位置和第二磁性体4432的安装位置的标识部445。标识部445可以设置为槽、刻度线或者是标识等。在安装第一磁体442和第二磁体443时，只要使用标识部445分别标识出第一磁体442和第二磁体443的其中一个磁性体的位置，就可以确定剩余磁性体的安装位置，从而方便第一磁体442和第二磁体443的安装。具体地，标识部445设置在内置管4442、盘状部4444及外环壁4446中的至少一个上。具体在图示的实施例中，内置管4442的两端的端面上均设于标识部445。
请结合图4和图10-图12，在图示的实施例中，导线450的一端与第一定子单元432连接，另一端与第二定子单元433连接。在一些实施例中，导线450的两端分别与第一定子单元432的第一线圈4322和第二定子单元433的第二线圈4223电连接。可以理解，第一定子单元432和第二定子单元433的连接方式不限于为上述方式，在一些实施例中，导线450的远离第一定子单元432的一端从泵壳410延伸至导管300中，而与外部供电装置连接；第二定子单元433通过其他导线与外部供电装置连接。
由于第一定子单元432和第二定子单元433之间具有转子440，不管是导线450的两端分别与第一定子单元432和第二定子单元433连接的方式，还是导线450的一端与第一定子单元432连接，另一端从泵壳410延伸至导管300中，导线450都具有一段与转子440的位置相对应，定义导线450的与转子440的位置相对应的部分为隔离段452，若转子440在转动过程中与隔离段452接触，有导致隔离段452随转子440转动而造成导线450断裂或脱落等故障的风险。
为此，在本实施例中，泵壳410的壳壁上还开设有间隔的第一过线孔413和第二过线孔414，第一过线孔413和第二过线孔414均与容置腔412连通。导线450穿设于第一过线孔413和第二过线孔414，隔离段452位于第一过线孔413和第二过线孔414之间，且隔离段452位于容置腔412外。也即，由于转子440位于容置腔412内，转子440和导线450的隔离段452分别位于第一过线孔413和第二过线孔414之间的泵壳410的壳壁的两侧，如此设置，导线450的隔离段452能够与转子440隔开，从而有效地避免转子440在 转动过程中接触到导线450，而导致导线450随转子440转动而造成导线450断裂或脱落等故障，从而保证血泵10的正常使用。
为了避免外物(例如血液等)从第一过线孔413和第二过线孔414进入容置腔412内，同时防止导线450的隔离段452外露，驱动装置400还包括盖体470，盖体470与泵壳410连接，盖体470完全遮盖第一过线孔413、第二过线孔414和导线450的隔离段452。其中，泵壳410具有用于与盖体470连接的连接位415，连接位415环绕第一过线孔413、第二过线孔414和隔离段452。换言之，连接位415在泵壳410的壳壁上围设出一块区域，第一过线孔413、第二过线孔414和和隔离段452位于这块由连接位415围设出的区域内。在一些实施例中，盖体470与连接位415通过焊接连接。
为了防止将盖体470安装至泵壳410的过程中产生的热量对导线450的位于第一过线孔413和第二过线孔414处的部分、以及位于容置腔412外的隔离段452的损伤，第一过线孔413、第二过线孔414以及导线450的隔离段452均与连接位415间隔一段距离，以使导线450与泵壳410的用于与盖体470连接的连接位415保持一定距离，以避免在将盖体470连接至泵壳410上的过程中产生的热量对导线450造成损伤，例如高温损伤导线450的绝缘层；同时，使第一过线孔413和第二过线孔414均与连接位415间隔一段距离，还能够减少将盖体470安装至泵壳410的过程中产生的热量从第一过线孔413和第二过线孔414进入容置腔412的内部，从而减少在盖体470安装时的热量对容置腔412内的元件造成损伤，例如对线圈绝缘层的损伤，例如对具有磁性的元件的磁性的影响，因此，通过上述方式能够提高良品率，减少血泵10故障。
请一并结合图13和图14，在图示的实施例中，泵壳410的外侧面凹陷形成沉槽416，沉槽416具有底壁416a及与底壁416a相对的开口。盖体470至少部分收容于沉槽416，盖体470的边缘与连接位415连接。其中，盖体470密封沉槽416的开口。连接位415环绕沉槽416的开口设置一周。具体地，连接位415为沉槽416的开口边沿。第一过线孔413和第二过线孔414均开设于沉槽416的底壁416a上，且第一过线孔413和第二过线孔414均与沉槽416的底壁416a的边缘间隔一段距离。其中，导线450的隔离段452位于沉槽416的底壁416a和盖体470之间；沉槽416的底壁416a位于转子440和导线450的隔离段452之间。
通过使泵壳410的外周侧面凹陷形成沉槽416的方式来隔离导线450的隔离段452，并使盖体470的至少部分收容于沉槽416，不仅可以减少因盖体470的设置而增大泵壳410的局部外径，甚至是不会增加泵壳410的局部外径，而且沉槽416对于盖体470能够起到限位的作用，不仅方便盖体470的安装，而且还可以更好地确保盖体470与泵壳410连接的稳定性。
具体地，沉槽416还具有环绕底壁416a设置一周的侧壁416c，沉槽416的侧壁416c与底壁416a大致垂直，或者，沉槽416的侧壁416c与底壁416a之间形成大于90°且小于180°的夹角。
在图示的实施例中，第一过线孔413和第二过线孔414沿泵壳410的轴向间隔布置。第一过线孔413较第二过线孔414更靠近转轴420的连接端421。在泵壳410的周向上，第一过线孔413和第二过线孔414的宽度均小于沉槽416的底壁416a的宽度；在泵壳410的轴向上，第一过线孔413和第二过线孔414的相互远离的一侧的最大距离小于沉槽416的底壁416a的宽度，从而使第一过线孔413和第二过线孔414均与沉槽416的底壁416a的边界间隔一段距离。从而，在泵壳410的轴向上，第一过线孔413和沉槽416的底壁416a的远端边界之间形成远端隔离部分417a，第二过线孔414与沉槽416的底壁416a的近端边界之间形成近端隔离部分417b；在泵壳410的周向上，第一过线孔413和沉槽416的底壁416a的两侧边界之间分别形成第一侧隔离部分417c和第二侧隔离部分417d，第二过线孔414和沉槽416的底壁416a的两侧边界之间形成第三侧隔离部分417e和第四侧隔离部分417f，底壁416a位于第一过线孔413和第二过线孔414之间的部分形成隔挡部分417g，远 端隔离部分417a、近端隔离部分417b、第一侧隔离部分417c、第二侧隔离部分417d、第三侧隔离部分417e、第四侧隔离部分417f以及隔挡部分417g连接共同组成沉槽416的底壁416a。其中，隔挡部分417g位于导线450的隔离段452和转子440之间。
需要说明的是，在本申请中，定义泵壳410的靠近叶轮200的一侧为远端，泵壳410的远离叶轮200的一端为近端。对应地，沉槽416的底壁416a的远端边界即为底壁416a靠近叶轮200的一侧的边界，沉槽416的底壁416a的近端边界即为底壁416a远离叶轮200的一侧的边界。定义泵壳410的环绕转轴420一周的方向为泵壳410的周向。
请结合图11-图15，具体地，泵壳410包括第一壳体418和与第一壳体418连接的第二壳体419，第二壳体419与第一壳体418对接以共同围设出容置腔412。其中，第一壳体418较第二壳体419更靠近转轴420的连接端421。沉槽416的一部分位于第二壳体419上，一部分位于第一壳体418上。第二过线孔414位于第二壳体419上，第二壳体419上开设有缺口419a，缺口419a为第一过线孔413的至少一部分。通过在第一壳体418和第二壳体419中的至少一个开设缺口，然后通过第一壳体418和第二壳体419的对接以形成第一过线孔413，能够在装配时方便导线450的穿入第一过线孔413，特别是对于孔径较小的第一过线孔413，提高装配效率。其中，第一定子单元432收容于第一壳体418内，第二定子单元433和转子440收容于第二壳体419。在图示的实施例中，远端隔离部分417a位于第一壳体418上；近端隔离部分417b、第一侧隔离部分417c、第二侧隔离部分417d、第三侧隔离部分417e、第四侧隔离部分417f以及隔挡部分417g均位于第二壳体419上。
具体地，第二壳体419的靠近第一壳体418的内壁上设有台阶部419b，第一壳体418包括同轴设置的第一段418a和第二段418b，第一段418a的外径较第二段418b的外径小，第一段418a插设于第二壳体419中，且第一段418a的远离第二段418b的端部的端面与第二壳体419的台阶部419b抵接，第二段418b位于第二壳体419外。如此设置，安装时，第一壳体418的第一段418a插置在第二壳体419中，可旋转第二壳体419和第一壳体418中的至少一个而调试安装位置，第一壳体418的第二段418b位于第二壳体419之外、并与第二壳体419的端部相抵接，如此可以充分发挥第二壳体419对第一壳体418的定位和导向功能，提高两者之间的装配效率和装配精度。其中，沉槽416的一部分位于第一段418a，另一部分位于第二壳体419上。更具体地，远端隔离部分417a位于第一段418a上。
需要说明的是，泵壳410不限于为分体的，在一些实施例中，泵壳410可以是一体成型的。第一过线孔413和/或第二过线孔414也不限于为上述方式，在一些实施例中，第一过线孔413可以完全设置在第一壳体418或第二壳体419上；在一些实施例中，第二壳体419的靠近第一壳体418的端部也设有缺口，第二壳体419的缺口和第一壳体418上的缺口的位置相对应，且第二壳体419的缺口和第一壳体418上的缺口共同形成第一过线孔413；在一些实施例中，第一壳体418的靠近第二壳体419的一端的端部上开设有缺口，第二壳体419不开设缺口，第一壳体418和第二壳体419对接后，在缺口位置形成第二过线孔414。
在图示的实施例中，盖体470的形状和尺寸均与沉槽416相适配。盖体470的外侧表面与泵壳410的外侧表面平齐，使得盖体470的设置不会增加泵壳410的局部外径。具体地，盖体470大致为弧形板状，泵壳410的外周侧面和盖体470的外表面平滑过渡。
具体地，盖体470的边缘与沉槽416的底壁416a边缘抵接，以便于在安装盖体470时底壁416a能够对盖体470起到承托作用，以方便盖体470安装至泵壳410上。更具体地，盖体470抵接于底壁416a的近端隔离部分417b、远端隔离部分417a、第一侧隔离部分417c、第二侧隔离部分417d、第三侧隔离部分417e、第四侧隔离部分417f、以及隔挡部分417g沿泵壳410的周向上的两侧。
具体地，第一过线孔413和第二过线孔414中的至少一个的靠近另一个的一侧的孔壁为弧形壁，弧形壁为凹面壁，如此设置可以减少第一过线孔413和/或第二过线孔414的孔壁对导线450的绝缘层的划伤几率。在图示的实施例中，第一过线孔413的靠近第二过线孔414的一侧的孔壁413a为弧形壁。
在图示的实施例中，在泵壳410的周向上，第一过线孔413的宽度小于第二过线孔414的宽度。对于具有多根导线450的情况，较小的第一过线孔413能够对多根导线450的隔离段452起到收拢集中的效果，较大的第二过线孔414能够方便导线450分开走线进入容置腔412，以便于对导线450的走线进行合理布置。
在其中一个实施例中，泵壳410的壳壁上开设有限位槽416d，限位槽416d位于泵壳410的壳壁外侧，且限位槽416d位于第一过线孔413和第二过线孔414之间。在图示的实施例中，限位槽416d为沉槽416的底壁416a(具体为隔挡部分417g)的朝向盖体470的表面局部凹陷形成，在泵壳410的周向上，沉槽416的底壁416a(具体为隔挡部分417g)的宽度大于限位槽416d的宽度。因此，在泵壳410的周向上，限位槽416的宽度也小于连接位415所围设区域的宽度。换而言之，连接位415环绕第一过线孔413、第二过线孔414和限位槽416d设置一周；盖体470也完全遮盖了限位槽416d。其中，导线450的隔离段452的至少部分被限制于限位槽416d。限位槽416d对导线450的隔离段452具有限位的作用，那么在组装驱动装置400时，特别是将盖体470连接至泵壳410时，对第一过线孔413和第二过线孔414之间的导线450进行限位，防止导线450散乱或移动而导致盖体470的安装不便，或者是在安装盖体470时防止第一过线孔413和第二过线孔414之间的导线450移动至盖体470和泵壳410的连接处(即连接位415)，从而进一步确保导线450的隔离段452能够远离泵壳410的与盖体470连接的连接位415。
在图示的实施例中，限位槽416b的延伸方向与泵壳410的轴向一致。在泵壳410的周向上，限位槽416d的宽度大于或等于第一过线孔413的宽度，而小于第二过线孔414的宽度，以便于导线450的隔离段452收集至限位槽416d中，同时方便导线450从第二过线孔414处分开走线进入容置腔412内。
具体地，限位槽416d的一端与第一过线孔413连通，另一端与第二过线孔414连通，以使第一过线孔413的靠近限位槽416d的一侧的孔壁相较于底壁416a的朝向盖体470的表面为凹陷的，第二过线孔414的靠近限位槽416d的一侧的孔壁相较于底壁416a的朝向盖体470的表面也为凹陷的，从而减小导线450在第一过线孔413处和第二过线孔414处的弯曲弧度，减小第一过线孔413和第二过线孔414的孔壁对导线450的损伤影响。
在图示的实施例中，在泵壳410的周向上，限位槽416d具有凹陷深度较大的中间部位416e和位于中间部位416e的两侧、且凹陷深度较小的两个侧部416f，泵壳410的壳壁在限位槽416d的中间部位416e的厚度小于泵壳410的壳壁在限位槽416d的两个侧部416f的厚度。每个侧部416f相对于底壁416a朝向盖体470的一面沿远离中间部位416e的方向的凹陷深度逐渐减小，即沿远离中间部位416e的方向，泵壳410的壳壁在每个侧部416f的厚度逐渐增加，该方式能够方便泵壳410的加工成型，提高泵壳410的成品率。限位槽416d的侧部416f的槽壁为弧形壁，以降低对导线450的损伤。
具体地，限位槽416d的中间部位416e的宽度大于或等于与第一定子单元连接的多个导线450的隔离段452依次平行排列的宽度，以尽可能地减小限位槽416d的深度，使得泵壳410的壳壁在限位槽416d对应的位置处能够具有尽可能大的厚度，以尽可能地使泵壳410具有较大的强度。
需要说明的是，在一些实施例中，泵壳410的壳壁上可以不设置沉槽416，限位槽416d直接设置在泵壳410的壳壁外侧，此时，限位槽416d可以为泵壳410的壳壁外表面局部凹陷形成，限位槽416d的槽壁位于转子440和隔离段452之间，以隔开导线450的隔离段452与转子440，盖体470连接于泵壳410上，并完全遮盖第一过线孔413、第二过线孔414、限位槽416d和隔离段452，以避免外物(例如血液等)从第一过线孔413和第二过线孔414进入容置腔412内，同时防止导线450的隔离段452外露；对应地，使连接位415环绕第一过线孔413、第二过线孔414和限位槽416d设置一周，且使第一过线孔413、第二过线孔414和限位槽416d均与连接位415间隔一段距离，以避免在将盖体470连接至泵壳410上的过程中产生的热量对导线450造成损伤，例如高温损伤导线450的绝缘层；同时，使 第一过线孔413和第二过线孔414均与连接位415间隔一段距离，还能够减少将盖体470安装至泵壳410的过程中产生的热量从第一过线孔413和第二过线孔414进入容置腔412的内部，从而减少在盖体470安装时的热量对容置腔412内的元件造成损伤，例如对线圈绝缘层的损伤，例如对具有磁性的元件的磁性的影响，以提高驱动装置400的良品率，减少故障。
请结合图3和图4，驱动装置400包括还包括轴套组件480，轴套组件480固定在泵壳410内，轴套组件480位于第一定子单元432和叶轮200之间，转轴420能够转动地穿设于轴套组件480。通过设置轴套组件480，可以对转轴420起到径向限位作用，减少转轴420在转动过程中产生径向晃动，提高转轴420转动的平稳性。轴套组件480可以一体成型，也可以分体成型。在图示的实施例中，泵壳410还具有第三壳体405，第三壳体405与第一壳体418的远离第二壳体419的一端对接，轴套组件410固定地收容于第三壳体405内。
在图示的实施例中，轴套组件480包括第一轴套482和第二轴套484，第一轴套482和第二轴套484均与泵壳410固接，转轴420能够转动地穿设于第一轴套482和第二轴套484，第一轴套482较第二轴套484更靠近叶轮200。
请一并结合图16，第一轴套482开设有第一穿孔4821和限位孔4823，第一穿孔4821和限位孔4823两者相互连通且同轴设置，限位孔4823的孔径大于第一穿孔4821的孔径，使得第一穿孔4821和限位孔4823两者共同形成一台阶孔。第一轴套482具有界定限位孔4823部分边界的第一限位面4825。
请一并结合图17，第二轴套484包括粗段4841和细段4843，细段4843的横截面小于粗段4841的横截面，粗段4841具有抵接面4845。细段4843凸设于抵接面4845上。第二轴套484具有第二穿孔4846，第二穿孔4846从细段4843的远离抵接面4845的一端的端面延伸至粗段4841的远离抵接面4845的一侧，以使第二穿孔4846贯穿于粗段4841和细段4843。
请一并结合图18，细段4843插设于限位孔4823，且抵接面4845与第一轴套482抵接。通过抵接面4845的限位作用以及细段4843的导向作用，可以提高整个轴套组件480的安装精度和安装效率。细段4843的远离抵接面4845的一端的端面为第二限位面4847，第二限位面4847和第一限位面4825间隔且相对。限位孔4823的孔壁、第一限位面4825和第二限位面4847共同围设出一限位腔486，第一穿孔4821和第二穿孔4846均与该限位腔486连通。
请一并结合图19，转轴420包括直轴部422和凸环部424，凸环部424固定地套设于直轴部422，凸环部424的外径大于直轴部422的直径。
直轴部422穿设于第一穿孔4821和第二穿孔4846，凸环部424收容于限位腔486内，凸环部424的外径大于第一穿孔4821的孔径，且凸环部424的外径大于第二穿孔4846的孔径。其中，直轴部422能够转动穿设于第一定子单元432，转子440固接于直轴部422。连接端421为直轴部422的一端。
在转轴420的延伸方向上，凸环部424位于第一限位面4825和第二限位面4847之间。凸环部424能够与第一限位面4825和第二限位面4847抵接，以在泵壳410的轴向上对转轴420进行定位，防止转轴420在泵壳410的轴向上的移动或限定转轴420在泵壳410的轴向上的移动范围。在一些实施例中，凸环部424始终与第一限位面4825和第二限位面4847抵接；在一些实施例中，第一限位面4825和第二限位面4847之间的间距略大于凸环部424的轴向上的高度，以使转轴420在旋转过程中，凸环部424在第一限位面4825和第二限位面4847之间具有一定的浮动空间，以供清洗流体流动。
其中，直轴部422和第一穿孔4821的孔壁之间形成有供清洗流体流动的第一间隙，直轴部422与第二穿孔4846的孔壁之间形成有供清洗流体流动的第二间隙，凸环部424与限位腔486的腔壁之间形成供清洗流体流动的第三间隙487。
第一限位面4825的局部凹陷形成第一导流槽4826，第一导流槽4826与第一穿孔4821连通，且第一导流槽4826和限位腔486连通；第二限位面4847的局部凹陷形成第二导流槽4848，第二导流槽4848与第二穿孔4846连通，且第一导流槽4826与限位腔486连通。如此，凸环部424与第一限位面4825和/或第二限位面4847抵接时，第一导流槽4826能够连通第一间隙和第三间隙487，第二导流槽4848能够连通第二间隙和第三间隙487。第一穿孔4821与套管组件100连通，第二穿孔4846与泵壳410的容置腔412连通。
当向血泵10远离套管组件100的一端通入清洗液时，该液体将依次流经容置腔412、第二间隙、第三间隙487和第一间隙，而进入套管组件100中，在从套管组件100的出口120中流出。由于清洗液的流动方向与血液在套管组件100中的流动方向相反，如此可以防止套管组件100中的血液进入驱动装置400内。并且注入的清洗液在第一间隙、第二间隙以及第三间隙487中流动，也起到转轴420和轴套组件480之间的润滑剂的作用，减少转轴420的转动阻力。
参阅图19，泵壳410内还设有承载凸起410a，该承载凸起410a呈环状，轴套组件480中的第二轴套484的粗段4841的远离抵接面4845的一侧抵接于该承载凸起410a上。承载凸起410a在泵壳410的轴向上对整个轴套组件480起到限位作用。具体地，承载凸起410a位于第三壳体405上；第一定子单元432的第一背板4323与第三壳体405固接。
需要说明的是，驱动装置400不限于为上述结构，在一些实施例中，转子440仍然位于第一定子单元432和第二定子单元433之间，转子440具有两个与转轴420固接的飞轮，第一磁体442和第二磁体443分别安装在两个飞轮上；
在一些实施例中，转子440还可以仅包括第一磁体442和第二磁体443，而不具有飞轮444，即转子440仍然位于第一定子单元432和第二定子单元433之间，此时，第一磁体442和第二磁体443直接与转轴420固定连接，此时，导线450的隔离段452的位置与第一磁体442和第二磁体443的位置均对应；
在一些实施例中，第一磁体442、第一定子单元432、第二磁体443和第二定子单元433沿转轴420的延伸方向依次排列，转轴420可以仅穿设于第一定子单元432，转轴420也可以穿设于第一定子单元432和第二定子单元433，第一磁体442靠近转轴420的连接端421，此时，导线450的隔离段452的位置与第二磁体443的位置对应；
在一些实施例中，第一磁体442、第一定子单元432、第二定子单元433和第二磁体443沿转轴420的延伸方向依次排列，转轴420能够转动地穿设于第一定子单元432和第二定子单元433，第一磁体442靠近转轴420的连接端421，此时，导线450为多个，部分导线450与第一定子单元432连接，部分导线450与第二定子单元433连接，每个导线450均具有隔离段452，多个导线450的隔离段452的位置均与第二磁体443的位置对应，此时，多个导线450均穿设于第一过线孔413和第二过线孔414，以使每个导线450的隔离段452均位于容置腔412之外；或者，第一定子单元432与第二定子单元433通过其他导线连接，导线450与第一定子单元432与第二定子单元433中的一个连接；
在一些实施例中，第一定子单元432、第一磁体442、第二定子单元433和第二磁体443沿转轴420的延伸方向依次排列，第一定子单元432靠近转轴420的连接端421，此时，泵壳410可以分别在第一磁体442和第二磁体443对应的位置均设置第一过线孔413和第二过线孔414，以隔离导线450的隔离段452。
在一些实施例中，转子440仅具有一个磁体，此时，第一定子单元432和第二定子单元433共用一个磁体，转子440仍然位于第一定子单元432和第二定子单元433之间；
在一些实施例中，定子420仅具有一个定子单元，此时，若叶轮200、定子430和转子440沿转轴420的延伸方向依次排列，导线450与定子430连接。
由于本实施例的驱动装置具有与第一实施例的驱动装置相似的结构，因此，本实施例的驱动装置及具有本实施例的驱动装置的血泵也具有第一实施例相似的效果。
以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本 申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围，均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种驱动装置，用于驱动叶轮转动，其特征在于，所述驱动装置包括：
    泵壳，具有容置腔，所述泵壳的壳壁上还开设有第一过线孔、第二过线孔和限位槽，所述第二过线孔与所述第一过线孔均与所述容置腔连通，所述第二过线孔和所述第一过线孔间隔，所述限位槽位于所述泵壳的壳壁外侧，且所述限位槽位于所述第一过线孔和所述第二过线孔之间；
    用于与所述叶轮连接的转轴，所述转轴能够转动地安装于所述泵壳；
    转子，能够转动地收容于所述容置腔，所述转子固接于所述转轴，所述转子能够带动转轴转动；
    定子，收容于所述容置腔，所述定子能够驱动所述转子转动；
    导线，与所述定子连接，所述导线穿设于所述第一过线孔和所述第二过线孔，所述导线具有与所述转子的位置相对应的隔离段，所述隔离段位于所述第一过线孔和所述第二过线孔之间，所述隔离段至少部分被限制于所述限位槽中，所述限位槽的槽壁位于所述转子和所述隔离段之间；及
    盖体，连接于所述泵壳上，并完全遮盖所述第一过线孔、所述第二过线孔、所述限位槽和所述隔离段。
  2. 根据权利要求1所述的驱动装置，其特征在于，所述限位槽从所述第一过线孔延伸至所述第二过线孔，所述第一过线孔和所述第二过线孔均与所述限位槽连通，所述限位槽由所述泵壳的外侧面凹陷形成。
  3. 根据权利要求2所述的驱动装置，其特征在于，在所述泵壳的周向上，所述限位槽具有凹陷深度较大的中间部位和位于所述中间部位的两侧、且凹陷深度较小的两个侧部，所述泵壳的壳壁在所述限位槽的所述中间部位的厚度小于所述泵壳的壳壁在所述限位槽的两个所述侧部的厚度，且沿远离所述中间部位的方向，所述泵壳的壳壁在每个所述侧部的厚度逐渐增加。
  4. 根据权利要求2所述的驱动装置，其特征在于，所述导线为多个，每个所述导线具有所述隔离部，所述限位槽的中间部位的宽度大于或等于多个所述导线的所述隔离段依次平行排列的宽度。
  5. 根据权利要求1所述的驱动装置，其特征在于，在所述泵壳的周向上，所述第一过线孔和所述第二过线孔中的至少一个的宽度大于所述限位槽的宽度。
  6. 根据权利要求1所述的驱动装置，其特征在于，在所述泵壳的周向上，所述第一过线孔和所述第二过线孔中的一个的宽度等于或小于所述限位槽的宽度；或者，在所述泵壳的周向上，所述第一过线孔和所述第二过线孔中的一个的宽度小于或等于所述限位槽的宽度，且另一个的宽度大于所述限位槽的宽度。
  7. 根据权利要求1所述的驱动装置，其特征在于，所述第一过线孔和所述第二过线孔中的至少一个的靠近所述限位槽的一侧的孔壁为弧形壁，所述弧形壁为凹面壁。
  8. 根据权利要求1所述的驱动装置，其特征在于，所述泵壳上设有连接位，所述连接位环绕所述第一过线孔、所述第二过线孔和所述限位槽设置一周，且所述第一过线孔、所述第二过线孔和所述限位槽均与所述连接位间隔一段距离，所述盖体与所述连接位连接。
  9. 根据权利要求8所述的驱动装置，其特征在于，所述泵壳的外侧面凹陷形成有沉槽，所述沉槽具有底壁及与所述底壁相对的开口，所述第一过线孔、所述第二过线孔和所述限位槽均位于所述沉槽的所述底壁上，在所述泵壳的周向上，所述沉槽的所述底壁的宽度大于所述限位槽的宽度，所述盖体至少部分收容于所述沉槽，所述连接位为所述沉槽的所述开口边沿。
  10. 根据权利要求9所述的驱动装置，其特征在于，所述第一过线孔、所述第二过线孔以及所述限位槽均与所述沉槽的所述底壁的边缘间隔一段距离，所述盖体的边 缘与所述沉槽的所述底壁的边缘抵接。
  11. 根据权利要求9所述的驱动装置，其特征在于，所述泵壳包括第一壳体和与所述第一壳体连接的第二壳体，所述第二壳体与所述第一壳体对接以共同围设出所述容置腔，所述沉槽的一部分位于所述第二壳体上，另一部分位于所述第一壳体上；所述第二壳体的靠近所述第一壳体的内壁上设有台阶部，所述第一壳体包括同轴设置的第一段和第二段，所述第一段的外径小于所述第二段的外径，所述第一段插设于所述第二壳体中，且所述第一段的远离所述第二段的一端的端面与所述第二壳体的台阶部抵接，所述第二段位于所述第二壳体外；其中，所述沉槽的所述底壁的一部分位于所述第一段上，另一部分位于所述第二壳体上。
  12. 根据权利要求8所述的驱动装置，其特征在于，所述盖体与所述连接位焊接连接；或者，所述泵壳的外侧面凹陷形成有沉槽，所述沉槽具有底壁及与所述底壁相对的开口，所述底壁上设有所述限位槽，所述盖体的背离所述沉槽的所述底壁的一侧与所述泵壳的外侧表面平齐。
  13. 根据权利要求1所述的驱动装置，其特征在于，所述泵壳包括第一壳体和与所述第一壳体连接的第二壳体，所述第二壳体与所述第一壳体对接以共同围设出所述容置腔，所述第二过线孔位于所述第二壳体上，所述第二壳体和所述第一壳体中的至少一个的靠近另一个的端部上开设有缺口，所述缺口为所述第一过线孔的至少一部分，所述限位槽位于所述第二壳体上；在所述泵壳的周向上，所述第一过线孔的宽度小于所述第二过线孔的宽度。
  14. 根据权利要求1所述的驱动装置，其特征在于，所述转子具有磁性，所述定子包括沿所述转轴的延伸方向设置的第一定子单元和第二定子单元，所述第一定子单元和所述第二定子单元均能够产生驱动所述转子转动的旋转磁场；所述第一定子单元和所述第二定子单元均固接于所述泵壳，所述转轴能够转动地穿设于所述第一定子单元，并与所述第二定子单元间隔，所述第一定子单元和所述第二定子单元均具有磁芯，所述磁芯包括磁柱，所述第二定子单元的磁柱的横截面大于所述第一定子单元的磁柱的横截面。
  15. 根据权利要求14所述的驱动装置，其特征在于，所述转子包括第一磁体和第二磁体，所述第一磁体和所述第二磁体均与所述转轴固接；在所述转轴的延伸方向上，所述第二磁体位于所述第一定子单元和所述第二定子单元之间；所述第一定子单元能够产生驱动所述第一磁体转动的旋转磁场，所述第二定子单元能够产生驱动第二磁体转动的旋转磁场；所述导线与所述第一定子单元连接，所述隔离段的位置至少与所述第二磁体的位置相对应。
  16. 根据权利要求14所述的驱动装置，其特征在于，所述转子包括飞轮、第一磁体和第二磁体，所述飞轮固接于所述转轴，所述飞轮位于所述第一定子单元和所述第二定子单元之间，所述第一磁体和所述第二磁体均安装于所述飞轮上，所述第一定子单元能够产生驱动所述第一磁体转动的旋转磁场，所述第二定子单元能够产生驱动第二磁体转动的旋转磁场。
  17. 根据权利要求16所述的驱动装置，其特征在于，所述飞轮包括盘状部，所述转轴固定地穿设于所述盘状部；所述第一磁体和所述第二磁体分别设置在所述盘状部的相背离的两侧，所述第一磁体和所述第二磁体均为环状的海尔贝克阵列磁铁，所述第一磁体包括沿所述第一磁体的轴向充磁的第一磁性体，所述第二磁体包括沿所述第二磁体的轴向充磁的第二磁性体，所述第一磁性体和第二磁性体的位置相对，在所述转轴的延伸方向上，所述第一磁性体和第二磁性体的朝向所述盘状部的一侧的极性相反。
  18. 根据权利要求1所述的驱动装置，其特征在于，所述转轴具有用于与所述叶轮连接的连接端，所述转子包括第一磁体和所述第二磁体，所述第一磁体和所述第二 磁体均固接于所述转轴上，所述定子包括沿所述转轴的延伸方向设置的第一定子单元和第二定子单元，所述第一定子单元能够产生驱动所述第一磁体转动的旋转磁场，所述第二定子单元能够产生驱动所述第二磁体转动的旋转磁场；在所述转轴的延伸方向上，所述第一磁体、所述第一定子单元、所述第二定子单元和所述第二磁体沿所述转轴的延伸方向依次设置，且所述第一磁体靠近所述转轴的所述连接端；所述第一定子单元和所述第二定子单元中的至少一个与所述导线连接，所述隔离段与所述第二磁体的位置相对应。
  19. 根据权利要求1所述的驱动装置，其特征在于，所述定子包括沿所述转轴的延伸方向设置的第一定子单元和第二定子单元；所述驱动装置还包括固定在所述泵壳内的轴套组件，所述轴套组件位于所述第一定子单元和所述叶轮之间；所述轴套组件包括第一轴套和第二轴套，所述第一轴套设有第一穿孔、限位孔及第一限位面，所述第二轴套设有第二穿孔和第二限位面，所述限位孔的孔壁、所述第一限位面和所述第二限位面共同围设出一限位腔；所述转轴包括直轴部和凸环部，所述直轴部穿设于所述第一穿孔和所述第二穿孔，所述凸环部收容于所述限位腔，且位于所述第一限位面和所述第二限位面之间。
  20. 一种血泵，其特征在于，包括叶轮和驱动装置，驱动装置用于驱动叶轮转动，所述驱动装置包括：
    泵壳，具有容置腔，所述泵壳的壳壁上还开设有第一过线孔、第二过线孔和限位槽，所述第二过线孔与所述第一过线孔均与所述容置腔连通，所述第二过线孔和所述第一过线孔间隔，所述限位槽位于所述泵壳的壳壁外侧，且所述限位槽位于所述第一过线孔和所述第二过线孔之间；
    用于与所述叶轮连接的转轴，所述转轴能够转动地安装于所述泵壳；
    转子，能够转动地收容于所述容置腔，所述转子固接于所述转轴，所述转子能够带动转轴转动；
    定子，收容于所述容置腔，所述定子能够驱动所述转子转动；
    导线，与所述定子连接，所述导线穿设于所述第一过线孔和所述第二过线孔，所述导线具有与所述转子的位置相对应的隔离段，所述隔离段位于所述第一过线孔和所述第二过线孔之间，所述隔离段至少部分被限制于所述限位槽中，所述限位槽的槽壁位于所述转子和所述隔离段之间；及
    盖体，连接于所述泵壳上，并完全遮盖所述第一过线孔、所述第二过线孔、所述限位槽和所述隔离段；
    其中，所述叶轮固接于所述转轴，所述叶轮能够随所述转轴转动。
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