EP4483477A1 - Moteur sans balai et procédé d'installation d'un moteur sans balai - Google Patents

Moteur sans balai et procédé d'installation d'un moteur sans balai

Info

Publication number
EP4483477A1
EP4483477A1 EP23705399.6A EP23705399A EP4483477A1 EP 4483477 A1 EP4483477 A1 EP 4483477A1 EP 23705399 A EP23705399 A EP 23705399A EP 4483477 A1 EP4483477 A1 EP 4483477A1
Authority
EP
European Patent Office
Prior art keywords
rotor
motor
inner sleeve
stator
flange
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.)
Pending
Application number
EP23705399.6A
Other languages
German (de)
English (en)
Inventor
Christian Mundle
Frank Burkhardt
Herbert Wallner
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.)
Abiomed Europe GmbH
Original Assignee
Abiomed Europe GmbH
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
Application filed by Abiomed Europe GmbH filed Critical Abiomed Europe GmbH
Publication of EP4483477A1 publication Critical patent/EP4483477A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/005—Fluid passages not relating to lubrication or cooling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the invention relates to a brushless motor, in particular as a drive for at least one impeller for conveying a fluid.
  • the motor has at least one housing, at least one stator and at least one rotor.
  • a fluid can flow through the housing at least in a gap between the stator and the rotor.
  • the housing has corresponding openings on the end sides.
  • the rotor is designed to be fluid-tight, and the stator is arranged in a fluid-tight stator space.
  • Brushless motors in particular brushless DC motors, are known in the prior art in a large number of configurations. Such engines, especially in small format, are used, for example, as drives for pumps for conveying fluids, for example fuels, in the food industry or in medical technology.
  • DE 299 21 352 U1 discloses a blood pump with an electric motor that can be arranged intravascularly.
  • An impeller for conveying the fluid is arranged on the motor shaft at a first end of the electric motor.
  • the stator windings are embedded in a synthetic resin matrix.
  • the bladeless rotor is mounted on a rotor shaft and protected against contact with the fluid by seals.
  • DE 10 2010 005 963 A1 discloses a brushless electric motor as a rotary drive for a fuel pump.
  • the rotor has a metal sleeve that hermetically seals the rotor.
  • the present invention is based on the object of specifying a brushless motor which is of particularly compact design with high performance and ensures increased requirements for sealing against fluids.
  • stator space is delimited in the direction of the rotor by at least one inner sleeve, and that at least one rotor bearing means for mounting the rotor is supported on an inner circumference of the inner sleeve.
  • the housing of the motor is preferably designed in such a way that a fluid, for example a flushing liquid, can flow through it axially between a first end side and a second end side.
  • a fluid for example a flushing liquid
  • the flow through the housing takes place essentially in the gap formed between the stator and the rotor, in particular the annular gap.
  • the gap between the stator and the rotor is delimited in the radial direction over the entire length of the stator by the inner sleeve.
  • the inner sleeve is preferably designed in such a way that it radially delimits the entire fluid path within the housing, in particular between a motor flange arranged at a first end and a flushing connection arranged at a second end.
  • the inner sleeve is part of the housing and delimits the gap in the direction of the stator space surrounding the rotor.
  • the inner sleeve surrounds a rotor chamber in which the rotor is arranged, in particular mounted, so that it can rotate.
  • the stator surrounds the rotor, which is rotatable about a motor axis A within a rotor space.
  • the motor advantageously has control and/or power electronics which are at least partially arranged in the housing.
  • the control and/or power electronics have at least one printed circuit board, which is arranged, in particular encapsulated, within the housing. Contact can preferably be made with the circuit board via at least one, preferably at least two or at least three, connecting line or connecting lines leading out of the housing.
  • At least one rotor bearing means for bearing the rotor is arranged in particular within the inner sleeve.
  • the rotor bearing means is arranged in such a way that it is supported on an inner circumference of the inner sleeve.
  • At least two rotor bearing means are preferably provided for mounting the rotor, with both rotor bearing means being supported on a circumference of the inner sleeve.
  • both rotor bearing means are arranged within the inner sleeve.
  • At least one rotor bearing means is designed, for example, as a ball bearing, magnetic bearing, ceramic bearing or slide bearing.
  • At least one rotor bearing means preferably has hydrodynamic lubrication and is designed in particular as a ceramic bearing. Both rotor bearing means are advantageously of identical design.
  • At least one rotor bearing means is mounted in the inner sleeve with a push fit, preferably both rotor bearing means are mounted in the inner sleeve with a push fit.
  • at least one rotor bearing preferably both rotor bearings, are connected, in particular glued, to the inner sleeve.
  • a very low friction in the rotor bearings can be achieved in that the rotor is prestressed in one direction with a very low prestressing force, in particular with at least one corrugated spring washer.
  • the biasing force is exactly or less than 5 N, in particular exactly or less than
  • At least part of the bearing cage, advantageously the entire bearing cage, is preferably made from a biocompatible plastic, in particular from polyetheretherketone (PEEK).
  • PEEK polyetheretherketone
  • the invention has the advantage over the prior art that high safety requirements with regard to fluids are achieved, in particular by the inner sleeve, while the motor is compact at the same time.
  • the at least partial flow of a fluid through the housing during operation ensures advantageous heat dissipation, which, for example, prevents high temperatures of the housing on the outside.
  • the motor is designed to be very efficient in order to prevent the fluid from heating up too much.
  • the rotor bearing means or the rotor bearing means is/are designed and arranged so that the fluid can flow around and/or through it.
  • the rotor bearing means or the rotor bearing means are consequently arranged in such a way that a fluid flowing in the gap between the stator and the rotor at least flows around and/or through them.
  • the cage is preferably made from a plastic, in particular from polyetheretherketone (PEEK).
  • PEEK polyetheretherketone
  • balls are made of ceramic and bearing rings—inner ring and/or outer ring—are made of corrosion-resistant steel.
  • a further advantageous embodiment of the motor provides that the inner sleeve is designed in one piece.
  • the inner sleeve extends integrally from the motor flange at a first end side to the opposite, second end side of the motor.
  • the inner sleeve consists of a biocompatible plastic.
  • suitable biocompatible Plastics have turned out to be in particular polyetheretherketone (PEEK) or polytetrafluoroethylene (PTFE).
  • PEEK polyetheretherketone
  • PTFE polytetrafluoroethylene
  • the inner sleeve is designed in several parts, in particular in two parts, and that the parts of the inner sleeve are joined together materially, in particular fluid-tight, preferably glued or welded.
  • the inner sleeve is advantageously designed in such a way that it delimits a rotor space within the housing in the radial direction.
  • the motor flange which delimits the rotor space axially and allows fluid to exit from the housing, in particular from the rotor space, is preferably formed on a first end side.
  • the rotor chamber is preferably delimited axially by a flushing connection, through which the fluid can enter the gap between the rotor and the stator.
  • the second end side of the motor or of the housing is sealed with a casting compound, in particular a casting compound that hardens with low stress.
  • the design of the inner sleeve has an impact on the efficiency of the engine and the size of the engine. According to a further embodiment, it is therefore provided in particular that the inner sleeve has a wall thickness of between 0.075 mm and 1 mm, at least in the region between the rotor and the stator, in particular along the length of the stator. A wall thickness of between 0.1 mm and 0.5 mm is particularly preferred.
  • the inner sleeve preferably has a constant wall thickness at least along the extent of the stator windings. Such small wall thicknesses pose a challenge to assembly, which is why a method for assembling an engine, which is described below, is also claimed according to the invention.
  • the inner sleeve delimits the rotor space, among other things.
  • the outer sleeve delimits the housing, in particular the stator space, on the outside in the radial direction.
  • the housing is designed in such a way that the inner sleeve delimits the stator space in the direction of the inner rotor space. In the radial direction also limits the Outer sleeve the housing along its entire perimeter.
  • a wall thickness of 0.05 mm and 1 mm, in particular between 0.1 mm and 0.5 mm, has proven particularly advantageous for the outer sleeve.
  • the outer sleeve is made of stainless steel.
  • a motor flange is arranged on at least a first end side of the motor.
  • the motor flange preferably supports the inner sleeve and the outer sleeve, so that the stator space between the inner sleeve and the outer sleeve is designed as an annular space.
  • the motor flange is preferably glued or welded to the outer sleeve. Laser welding between the outer sleeve and the motor flange is particularly preferred.
  • the motor flange is made of the same material as the outer sleeve.
  • the motor flange preferably has a central recess which provides an opening to the rotor space in order to ensure the flow of fluid.
  • the motor flange has at least one central thread.
  • the motor can be fastened to the thread or the thread serves as an interface for fastening further components to the motor.
  • the motor flange is preferably penetrated by at least one motor shaft section of the rotor.
  • the motor shaft section is designed to drive, for example, a shaft that can be coupled to the motor shaft section.
  • the motor shaft section has means that are designed to interact with a shaft that can be coupled in a form-fitting manner, in particular for the transmission of torque.
  • the motor shaft section is rotatable at least in the operating state of the motor.
  • the inner sleeve has at least one flange section on the first end side, which in particular lines a central recess of the motor flange on the inside.
  • the flange section is preferably pressed into the recess in the motor flange.
  • the wall thickness in the area of the flange section is preferably increased compared to the wall thickness in the area between the rotor and the stator, in particular at least doubled.
  • at least one section with a reduced diameter is also provided in the flange section of the inner sleeve, so that at least one stop edge is provided for a rotor bearing means and/or a mounting ring.
  • the mounting ring is made of polyetheretherketone (PEEK), for example.
  • a collar-like extension is preferably formed between the flange section and the section of the inner sleeve with a constant wall thickness, which extends between the rotor and the stator, and which preferably extends in the direction of the outer sleeve of the motor.
  • the collar-like extension is arranged in such a way that it bears against the motor flange, in particular on the front side.
  • the collar-like extension is used in particular for electrical insulation from the motor flange and for the axial positioning of the coils and the back iron.
  • the housing Opposite the first end side of the motor, the housing, in particular the stator space, is sealed with at least one sealing compound, for example.
  • at least one connection line for the motor and/or a flushing connection passes through the casting compound.
  • the flushing connector is preferably made of the same material as the outer sleeve.
  • the casting compound preferably fills both the annular space between the outer sleeve and the inner sleeve and the end area of the inner sleeve. Low-stress curing potting compounds have proven to be particularly advantageous.
  • the outer sleeve extends on the second end side to the end of the housing, with the inner sleeve being at a slight distance from the end of the housing within the casting compound.
  • the use of the potting compound has the advantage that heat is dissipated and that the inner sleeve is supported and stabilized.
  • the centner flange preferably also serves as a means of limiting the casting compound.
  • the stator space in particular the cavities present in the stator space, are cast with at least one second casting compound, preferably a low-stress curing casting compound, in particular up to the centering flange.
  • the centering flange preferably has at least one passage for introducing casting compound.
  • the motor in particular the stator space, is thus advantageously redundantly sealed against ambient media, on the first end side by the motor flange and the potting compound in the stator space, at the second end side by the external potting compound and the second potting compound in the stator space.
  • the rinsing connection in the second end area of the housing has at least one connection contour outside the housing, for example for a hose.
  • the connecting contour is designed as a spike profile, for example.
  • the flushing connection is used to conduct fluid, for example a flushing liquid, through the casting compound into the housing of the motor, in particular from the inner circumference of the inner sleeve, so that the fluid can flush around the rotor and flow in the axial direction in the gap between rotor and stator.
  • the outer diameter of the flushing connection in the area of the inner sleeve preferably has a diameter that corresponds to the inner diameter of the inner sleeve.
  • the flushing connection preferably has a sliding fit on the inner circumference of the inner sleeve.
  • At least one circuit board for example ring-shaped, with control and/or power electronics for the motor is preferably arranged in the housing, in particular in the stator space.
  • the Circuit board held by a circuit board carrier extending annularly around the outer circumference of the inner sleeve.
  • the rotor is preferably mounted entirely within the inner sleeve. According to a further embodiment of the motor, it has also been found to be advantageous if the rotor has at least one rotor sleeve and that the rotor sleeve has a first shaft attachment on a first end side and a second shaft attachment on a second end side. The rotor is preferably mounted on the shaft extensions of the rotor sleeve.
  • At least one permanent magnet of the rotor is arranged inside the rotor sleeve.
  • the at least one permanent magnet is arranged in the rotor sleeve between the first shaft extension and the second shaft extension.
  • the permanent magnet is preferably designed as a solid cylinder magnet, in particular as a neodymium-iron-boron magnet.
  • the rotor sleeve consists, for example, of the same material as the outer sleeve of the motor.
  • the first shaft attachment and the second shaft attachment are also made of this material, for example.
  • the first shaft extension and/or the second shaft extension are welded to the rotor sleeve, in particular by laser welding.
  • the first shaft extension at a first end side of the motor protrudes at least partially into the rotor sleeve and is preferably closed on the inside with a plug, in particular a plug made of polyetheretherketone (PEEK), in order to prevent the ingress of fluid.
  • the first shaft attachment also has a motor shaft section on which, for example, the first bearing means is arranged.
  • the motor shaft section emerges from the housing through the motor flange in order, for example, to drive a shaft that can be connected to the motor shaft section.
  • the connectable shaft is pushed at least partially into the motor shaft section for connection.
  • the motor shaft section provides in particular an interface for the transmission of a Torque.
  • the motor shaft section has, for example, at least partially a profiled outer contour or inner contour, in particular a square socket and/or a square socket.
  • the second shaft extension on a second end side of the housing also penetrates at least partially into the rotor sleeve and is preferably welded to it.
  • the diameter is reduced in such a way that it corresponds to the inside diameter of the rotor bearing means arranged there.
  • the inner diameter of both rotor bearing means is preferably essentially identical.
  • a spring washer in particular a corrugated spring washer, is arranged on the second shaft extension, which is preferably supported against the flushing connection in order to support the rotor with a sliding fit in the axial direction.
  • the rotor is preferably prestressed by the spring washer, in particular with a prestressing force of less than or equal to 5 N, preferably less than or equal to 3 N.
  • the bias is preferably towards the first end side of the motor.
  • the rotor sleeve is advantageously connected to the shaft extensions in a fluid-tight manner.
  • a further embodiment of the motor provides that the first shaft extension has at least one motor shaft section on the first end side.
  • the motor shaft section is at least partially hollow so that a fluid can flow through it.
  • the motor shaft section has an axially running recess.
  • the motor shaft section is formed in one piece with the first shaft extension, for example.
  • the motor shaft section is attached to the shaft extension.
  • a first motor shaft section preferably without a recess, is arranged on the first shaft extension, and that a second motor shaft section, in particular as an adapter, can be fastened to the first motor shaft section, with the second motor shaft section having a longitudinal recess, preferably with a Internal square has.
  • the stator has an iron yoke with a large number of individual laminations arranged next to one another.
  • the back iron is arranged between the windings of the stator and the outer sleeve.
  • the individual sheets are formed from silicon-iron or nickel sheet, for example.
  • the individual sheets of the iron backing preferably have a thickness of between 0.05 mm and 0.5 mm. A thickness of between 0.05 mm and 0.3 mm is also preferred. A thickness of about 0.1 mm or 0.2 mm for each of the individual sheets is particularly preferred.
  • the stator has at least three or at least four pairs of coils.
  • the coils are wound ironless, preferably according to the bell-shaped armature principle.
  • two pairs of coils, in particular pairs of coils arranged substantially opposite one another, are connected in series, so that, for example, with six coils there are only six winding taps.
  • the coils are connected on the circuit board.
  • the gap between the rotor and the stator has a height of between 0.12 mm and 1.5 mm over at least 50% of the length of the rotor.
  • the gap between the rotor and the stator has the aforementioned height at least over the entire length of the rotor sleeve.
  • a gap height of between 0.25 mm and 1 mm is particularly preferred, and a gap height of about 0.5 mm is very particularly preferred.
  • the efficiency of the motor can be influenced in that the ratio of the outer diameter of the inner sleeve to the outer diameter of the housing is between 0.3 and 0.7.
  • a ratio of 0.5 is particularly preferred.
  • the ratio of the outer diameter of the winding of the stator to the outer diameter of the iron yoke is between 0.6 and 0.9, in particular about 0.8.
  • the invention also relates to a method for assembling a motor, in particular according to one of the above exemplary embodiments, at least having the following method steps:
  • stator windings and the back iron in the stator space, in particular on an outer circumference of an inner sleeve, in the, in particular not yet solidified, first casting compound
  • cavities remaining in the stator space after the introduction of the stator windings and the back iron, in particular up to the centering flange, are filled with casting compound.
  • the rotor is prestressed via the flushing flange in the direction of the first end side, that the casting compound is then introduced, and that the prestressing is released after the casting compound has hardened, so that the rotor remains prestressed between the flushing flange and the first end side.
  • FIG. 1 shows an embodiment of a brushless motor according to the invention in a side sectional view
  • FIG. 2 shows an exemplary embodiment of a schematic sequence of a method according to the invention.
  • Fig. 1 shows an embodiment of a brushless motor 1 in a sectional side view.
  • the motor 1 is particularly suitable as a drive for a shaft that can be coupled formed, for example, with at least one impeller for conveying a fluid.
  • the motor 1 has at least one housing 2 , a stator 3 and a rotor 4 .
  • the housing 2 is designed in such a way that a fluid can flow through it in a gap 5 , in particular an annular gap, between the stator 3 and the rotor 4 .
  • the stator 3 is formed in a fluid-tight stator space 6 .
  • the rotor 4 is also designed to be fluid-tight and, during operation, is arranged in a rotor space 7 filled with fluid.
  • the gap 5 has a constant height essentially along the extension of the stator 3 .
  • the stator space 6 is delimited by an inner sleeve 8 in the direction of the rotor 4 , in particular in the radial direction.
  • the inner sleeve 8 thus also delimits the outer circumference of the rotor space 7 .
  • the rotor 4 is rotatable about a motor axis A running centrally through the housing 2 .
  • the rotor bearing means 9 are designed as ball bearings with a cage made from polyetheretherketone (PEEK).
  • PEEK polyetheretherketone
  • the bearing outer ring of the rotor bearing means 9 is supported on an inside 10 of the inner sleeve 8 .
  • a sliding fit is formed between the rotor bearing means 9 and the inner sleeve 8 .
  • a fluid flowing in the gap 5 between the rotor 4 and the stator 3 can flow through the rotor bearing means 9 .
  • the inner sleeve 8 is made in one piece from polyetheretherketone (PEEK) and delimits the rotor chamber 7 in the radial direction.
  • the inner sleeve 8 delimits the entire space within the housing 2 in which a fluid can flow through the housing 2 in the axial direction.
  • the inner sleeve 8 has a constant wall thickness, which is preferably approximately 0.5 mm.
  • the stator space 6 is delimited by an outer sleeve 11 on an outer circumference of the housing 2 .
  • the outer sleeve 11 is preferably made of a corrosion-resistant steel and has a wall thickness of about 0.5 mm.
  • the inner sleeve 8 and the outer sleeve 11 are attached to a first end face 12 of the
  • the outer sleeve 11 is on the Motor flange 13 partially pushed and welded to it by laser welding.
  • the inner sleeve 8 has a flange section 14 and extends at the first end side 12 with the flange section 14 into the motor flange 13 and is preferably pressed into the motor flange 13 .
  • the flange section 14 extends in a central recess 16 within the motor flange 13.
  • the inner sleeve 8 extends to the end of the motor flange 13 and is flush with the motor flange 13.
  • the inner sleeve 8 bears against the motor flange 13 with a collar-like extension 15 at the end face.
  • the stator 3 is formed in the stator space 6 on the other side of the collar-like extension 15 .
  • the wall thickness of the inner sleeve 8 in the area of the flange section 14 is at least twice as large as in the area of the gap 5 between the stator 3 and rotor 4.
  • the flange section 14 has an area 17 with a reduced diameter, around a mounting edge 18 within the flange section 14 for a rotor bearing means 9 to ensure.
  • the inner diameter in area 17 corresponds to the inner diameter of inner sleeve 8 in the area between stator 3 and rotor 4.
  • the first rotor bearing means 9 bears against the mounting edge 18, so that the first rotor bearing means 9 is supported in the axial direction.
  • a centering flange 21 is arranged between the outer circumference of the inner sleeve 8 and the inner circumference of the outer sleeve 11 on the second end side 20 of the motor 1 or of the housing 2 .
  • the centner flange 21 holds the inner sleeve 8 and the outer sleeve 11 at a distance from one another.
  • the centner flange 21 also delimits the stator space 6 in the axial direction.
  • the stator space 6 is completely filled with a first casting compound 22, for example.
  • the housing 2 or the motor 1 is completely closed by a second casting compound 23 on the second end side 20 .
  • the second casting compound 23 terminates flush with the outer sleeve 11 .
  • the inner sleeve 8 ends at a distance in the potting compound 23.
  • the potting compound 23 is an electrical Connection line 24 of the motor 1 and a flushing connection 25 arranged on the second end side 20 pass through.
  • the rinsing connection 25 has a connection profile 26 on the outside, for example for a hose. On the inside, the rinsing connection 25 serves to introduce the fluid flowing in the gap 5 and is inserted into the inner circumference of the inner sleeve 8 in a form-fitting manner.
  • the rinsing connection 25 is in full contact with the inside 10 of the inner sleeve 8 and preferably forms a sliding fit with the inner sleeve 8 .
  • the flow direction of a fluid from the flushing connection 25 to the motor flange 13 is advantageous.
  • a spring washer 27 is arranged in the axial direction along the motor axis A between the rotor 4 and the flushing connection 25 and preloads the rotor 4 in the axial direction in the direction of the first end side 12 .
  • the rotor bearing means 9 can be moved axially within the framework of the sliding fit and the spring force of the spring washer 27 and braced against one another by the spring force.
  • the rotor 4 has a rotor sleeve 28 which is fastened to a first shaft extension 29 on the first end side 12 and to a second shaft extension 30 on the second end side 20 .
  • the rotor sleeve 28 is connected to the shaft extensions 29, 30 in a fluid-tight manner by being welded, in particular laser-welded, to the shaft extensions 29, 30. Material can be applied to the first shaft extension 29 and/or the second shaft extension 30 for balancing the rotor 4 or material can be removed.
  • the first shaft extension 29 on the first end side 12 of the motor 1 extends at least partially into the rotor sleeve 28 .
  • the first shaft attachment 29 has a motor shaft section 31 which protrudes from the housing 2 at the first end side 12 in order, for example, to have a shaft--not shown--to cooperate and to drive the shaft.
  • the motor shaft section 31 preferably has a - on square socket - not shown.
  • the motor shaft portion 31 is hollow.
  • a permanent magnet 34 in the form of a solid cylinder magnet is arranged inside the rotor sleeve 28 between the first shaft extension 29 and the second shaft extension 30 .
  • the second shaft extension 30 also extends at least partially into the rotor sleeve 28 . In the direction of the second end side 20, the second shaft extension 30 has a reduced diameter, so that it can advantageously be mounted in the second rotor bearing means 9.
  • the spring washer 27 brings about a spring force on the rotor 4 in the direction of the first end side 12 so that the rotor 4 is pressed against the mounting edge 18 via the rotor bearing means 9 on the first end side 12 .
  • the stator 3 has an iron yoke 35 with a large number of individual laminations 35a which extend side by side in the stator space 6 .
  • the stator 3 also has an ironless winding 36 with three pairs of coils.
  • the winding 36 extends from the collar-like extension 15 on the first end side 12 to a circuit board carrier 37 on the second end side 20.
  • the circuit board carrier 37 is ring-shaped and holds a circuit board 38, which is also ring-shaped.
  • the circuit board 38 is used here for the electrical connection of the coil pairs of the motor 1.
  • the gap 5 between the rotor 4 and the stator 3 is dimensioned in such a way that it has a height of approximately 0.5 mm at least in the area where the rotor sleeve 28 extends. Such a height of the gap 5 has turned out to be particularly advantageous for the efficiency of the motor 1 .
  • Fig. 2 shows an exemplary embodiment of a schematic sequence of a method 100 according to the invention
  • the outer sleeve 11 is applied to the motor flange 13 and welded to it, and the inner sleeve 8 is pressed into the recess 16 with its flange section 14 .
  • the motor flange 13 with the outer sleeve 11 is provided 101.
  • the annular space created between the outer sleeve 11 and the inner sleeve 8 - the stator space 6 - is then filled with a first casting compound 22 102.
  • the stator windings 36 are placed together with the back iron 35 in the still liquid first casting compound 22 introduced 104.
  • any cavities present in the stator chamber 6 are filled with the first casting compound 22, so that the second casting compound reaches as far as the centering flange.
  • first the first rotor bearing means 9 together with the preassembled rotor 4 is introduced 104 into the rotor chamber 7 in the inner sleeve 8 in such a way that the first rotor bearing means 9 bears against the assembly edge 18 .
  • the rotor bearing means 9 are supported on the inside 10 of the inner sleeve 8 .
  • the spring washer 27 is then placed 105 in the inner sleeve together with the scavenging connection 25 and a force is applied to the scavenging connection 25 in the direction of the first end side 12 , so that the rotor 4 is pretensioned in the direction of the first end side 12 .
  • encapsulation 106 takes place with the second encapsulation compound 23 on the second end side 20. The force on the flushing connection 25 is maintained until the second encapsulation compound 23 has completely hardened.
  • the pre-assembly of the stator 3 up to the introduction of the centering flange 21 and the hardening of the first casting compound 22 and the pre-assembly of the rotor 4 including the bearing means 10 preferably take place outside of a clean room.
  • the assembly of the rotor 4 in the stator 3, including the application and curing of the second casting compound 23, preferably takes place in a clean room.
  • the invention is not limited to the exemplary embodiments shown and described, but also includes all embodiments that have the same effect within the meaning of the invention. It is expressly emphasized that the exemplary embodiments are not limited to all features in combination, on the contrary, each individual partial feature can also have an inventive significance independently of all other partial features. Furthermore, the invention has not yet been limited to the combination of features defined in claim 1, but can also be defined by any other combination of specific features of all the individual features disclosed overall. This means that in principle practically every individual feature of claim 1 can be omitted or replaced by at least one individual feature disclosed elsewhere in the application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne un moteur sans balai (1), utilisé en particulier en tant qu'entraînement pour une pompe afin de transporter un fluide, comprenant au moins un boîtier (2), au moins un stator (3) et au moins un rotor (4) : -un fluide pouvant s'écouler à travers le boîtier (2) au moins dans un espace (5) entre le stator (3) et le rotor (4) dans le boîtier (2) ; le stator (3) étant formé dans une chambre de stator étanche aux fluides (6) ; et le rotor (4) étant étanche aux fluides. Afin de fournir un moteur compact (1) répondant à des exigences élevées en matière d'étanchéité aux fluides environnants, la chambre de stator (6) est délimitée vers le rotor (4) par au moins un manchon interne (8), et au moins un moyen de support du rotor (9) pour supporter le rotor (4) est supporté sur une périphérie interne (10) du manchon interne (8).
EP23705399.6A 2022-02-22 2023-02-15 Moteur sans balai et procédé d'installation d'un moteur sans balai Pending EP4483477A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022201849.4A DE102022201849A1 (de) 2022-02-22 2022-02-22 Bürstenloser Motor sowie Verfahren zur Montage eines bürstenlosen Motors
PCT/EP2023/053746 WO2023161094A1 (fr) 2022-02-22 2023-02-15 Moteur sans balai et procédé d'installation d'un moteur sans balai

Publications (1)

Publication Number Publication Date
EP4483477A1 true EP4483477A1 (fr) 2025-01-01

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Application Number Title Priority Date Filing Date
EP23705399.6A Pending EP4483477A1 (fr) 2022-02-22 2023-02-15 Moteur sans balai et procédé d'installation d'un moteur sans balai

Country Status (11)

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US (1) US20250149949A1 (fr)
EP (1) EP4483477A1 (fr)
JP (1) JP2025505827A (fr)
KR (1) KR20240148384A (fr)
CN (1) CN118743137A (fr)
AU (1) AU2023223545A1 (fr)
CA (1) CA3242641A1 (fr)
DE (2) DE102022201849A1 (fr)
IL (1) IL314017A (fr)
TW (1) TW202343935A (fr)
WO (1) WO2023161094A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2024401293A1 (en) * 2023-12-15 2026-07-30 Abiomed Europe Gmbh Blood pump motor
DE102024116676A1 (de) * 2024-06-13 2025-12-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Spaltrohr für eine wicklungsdirektgekühlte E-Maschine Maschine sowie ein dazugehöriges Herstellungsverfahren und eine wicklungsdirektgekühlte EMaschine
CN223206924U (zh) * 2024-10-08 2025-08-08 深圳市小红包科技有限公司 一种潜水电机、潜水泵及静音抽水器
CN121417563B (zh) * 2025-12-29 2026-06-05 安徽通灵仿生科技有限公司 一种导管泵电机及其制造方法

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Publication number Priority date Publication date Assignee Title
GB1320841A (en) 1971-01-04 1973-06-20 Matsushita Electric Industrial Co Ltd Motor driven pump
DE2706511A1 (de) * 1977-02-16 1978-08-17 Hermetic Pumpen Gmbh Spaltrohrmotorpumpenaggregat
JPS5996843A (ja) * 1982-11-19 1984-06-04 Hitachi Ltd 水中モータ
JPH0620357B2 (ja) * 1988-10-12 1994-03-16 株式会社帝国電機製作所 キャンドモータおよびその製造方法
DE19845864A1 (de) 1998-10-05 2000-04-06 Wilo Gmbh Spaltrohrmotor
DE29921352U1 (de) 1999-12-04 2001-04-12 Impella Cardiotechnik AG, 52074 Aachen Intravasale Blutpumpe
US6884043B2 (en) * 2002-02-28 2005-04-26 Standex International Corp. Fluid circulation path for motor pump
DE102008014379A1 (de) 2008-03-17 2009-09-24 Sycotec Gmbh & Co. Kg Elektromechanische Maschine
DE102010005963A1 (de) 2010-01-28 2011-08-18 Minebea Co., Ltd. Rotor mit umspritzter Hülse
EP3032712B1 (fr) * 2014-12-12 2018-02-07 Goodrich Control Systems Moteur pour actionneur électro-hydraulique
CN108054867B (zh) * 2018-01-22 2019-07-09 珠海格力电器股份有限公司 转子轴组件、转子及电机

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AU2023223545A1 (en) 2024-07-25
TW202343935A (zh) 2023-11-01
US20250149949A1 (en) 2025-05-08
WO2023161094A1 (fr) 2023-08-31
CN118743137A (zh) 2024-10-01
IL314017A (en) 2024-08-01
KR20240148384A (ko) 2024-10-11
DE102022201849A1 (de) 2023-08-24
JP2025505827A (ja) 2025-02-28
CA3242641A1 (en) 2023-08-31
DE112023001054A5 (de) 2025-03-13

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