CN118564507B - New energy work machine driving device and new energy work machine - Google Patents
New energy work machine driving device and new energy work machine Download PDFInfo
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- CN118564507B CN118564507B CN202411052839.XA CN202411052839A CN118564507B CN 118564507 B CN118564507 B CN 118564507B CN 202411052839 A CN202411052839 A CN 202411052839A CN 118564507 B CN118564507 B CN 118564507B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/028—Shuttle valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The application discloses a new energy operation machine driving device and a new energy operation machine, wherein the new energy operation machine driving device comprises a power battery pack, a main pump motor, an auxiliary pump motor, a main pump assembly, an auxiliary pump assembly, a main valve assembly, a first executing mechanism, an auxiliary valve and a second executing mechanism, the power battery pack is connected to the main pump motor and the auxiliary pump motor, the main pump motor is used for driving the main pump assembly to work, the auxiliary pump motor is used for driving the auxiliary pump assembly to work, the main pump assembly is connected to the main valve assembly, and the auxiliary pump assembly is connected to the main valve assembly and the auxiliary valve. In the new energy operation machine driving device and the new energy operation machine, the power battery pack is used for supplying energy to the main pump assembly and the auxiliary pump assembly, so that the new energy operation machine driving device is more energy-saving and environment-friendly, and the use cost of a user is greatly reduced; the first actuating mechanism with larger power requirement can be driven by the main pump assembly and the auxiliary pump assembly together during working, so that a duplex pump structure is not needed, the cost is lower, the size is smaller, and the whole machine can be conveniently arranged and installed.
Description
Technical Field
The application relates to the technical field of new energy equipment, in particular to a new energy operation machine driving device and a new energy operation machine.
Background
For the traditional working machines such as rotary drilling rigs, excavators, automobile cranes and the like, the engine directly drives the hydraulic pump to supply oil to the executing mechanisms such as the traveling motor, the rotary motor and the like, so that the traveling or the working of the working machine is realized. Referring to fig. 1, in a rotary drilling rig, an engine drives a first main pump, a second main pump and a secondary pump, the first main pump and the second main pump which are connected in parallel supply oil to a main valve, a left traveling motor and a right traveling motor are driven to work, and the secondary pump supplies oil to execution mechanisms such as a pressurizing oil cylinder, a mast oil cylinder, a luffing oil cylinder and the like through a secondary valve. Wherein, the auxiliary pump does not participate in the driving of the walking motor. However, the power sources of engineering machinery such as the traditional rotary drilling rig come from diesel engines, and the use cost is higher under the condition that the energy supply is increasingly tense; and the selectable row gauge of the duplex pump is fixed, a pump set with the displacement higher than the actual use requirement is selected during the normal type selection, the cost is higher, the overall dimension of the duplex pump is larger, and the duplex pump cannot be installed when the arrangement space of a host is limited.
Disclosure of Invention
In view of the above, an object of the present application is to provide a new energy work machine driving device and a new energy work machine that use energy conservation, are environmentally friendly, have low cost, and have a small size.
In order to achieve the above object, the present application provides a driving device for a new energy working machine, including a power battery pack, a main pump motor, an auxiliary pump motor, a main pump assembly, an auxiliary pump assembly, a main pump assembly, a first actuator, an auxiliary valve and a second actuator, wherein the power battery pack is connected to the main pump motor and the auxiliary pump motor for supplying power to the main pump motor and the auxiliary pump motor, the main pump motor is used for driving the main pump assembly to work, the auxiliary pump motor is used for driving the auxiliary pump assembly to work, the main pump assembly is connected to the main pump assembly for supplying oil to the first actuator through the main pump assembly, the auxiliary pump assembly is connected to the main pump assembly and the auxiliary valve, and the auxiliary pump assembly is used for supplying oil to the first actuator through the main pump assembly together with the main pump assembly or supplying oil to the second actuator through the auxiliary valve; the novel energy operation mechanical driving device further comprises a first main oil way, a second main oil way, a third main oil way and a converging block, wherein an oil outlet of the main pump assembly is respectively connected with the first main oil way and the second main oil way, an oil outlet of the auxiliary pump assembly is connected with the third main oil way, the first main oil way is connected with an oil inlet of the main valve assembly, the second main oil way and the third main oil way are both connected with the converging block, the converging block is connected with an oil inlet of the main valve assembly, and the converging block is also connected with the auxiliary valve.
Optionally, the new energy working machine driving device further comprises an engine and a generator, wherein the engine is connected with the generator, the engine is used for driving the generator to work and generate electricity, the generator is connected with the power battery pack, and the generator is used for generating electricity to charge the power battery pack; and/or the new energy operation mechanical driving device further comprises an external power interface connected with the power battery pack, and the external power interface is used for being connected with an external power supply so as to charge the power battery pack.
Optionally, the new energy operation mechanical driving device further comprises a power head motor, a main winding motor, a power head motor and a main winding motor, wherein the power battery pack is connected with the power head motor and the main winding motor and is used for supplying power to the power head motor and the main winding motor, the power head motor is used for driving the power head motor to work, and the main winding motor is used for driving the main winding motor to work.
Optionally, the new energy working machine driving device further comprises a flow dividing block, the flow dividing block is connected to the oil outlet of the main pump assembly, the first main oil way and the second main oil way are respectively connected to the two oil outlets of the flow dividing block, and the flow dividing block is used for carrying out flow dividing on the output flow of the main pump assembly.
Optionally, the new energy working machine driving device further includes a shuttle valve, the main pump assembly and the auxiliary pump assembly are all hydraulic pumps with load sensitivity, the main valve assembly includes a first feedback port, the auxiliary valve includes a second feedback port, the main pump assembly includes a first induction port, the auxiliary pump assembly includes a second induction port, the first feedback port and the second feedback port are respectively connected to two input ports of the shuttle valve, the second induction port is connected to an output port of the shuttle valve, and the first feedback port is further connected to the first induction port.
Optionally, the first actuating mechanism includes left walking motor and right walking motor, the main valve subassembly includes first main valve, second main valve, first compensator and second compensator, first main valve and second main valve all connect in the main valve subassembly with the confluence piece, first main valve still connect in first compensator with left walking motor, the second main valve still connect in second compensator with right walking motor, the pressure oil of main pump subassembly output passes through first main valve and first compensator back get into left walking motor, and/or the pressure oil of main pump subassembly output passes through second main valve and second compensator back get into right walking motor, the pressure oil of auxiliary pump subassembly output passes through first main valve and first compensator back get into left walking motor, and/or the pressure oil of auxiliary pump subassembly output passes through second main valve and second compensator back get into first compensator back to the first induction system with the second induction port will be given back to the first induction port.
Optionally, the first main valve and the second main valve each comprise a first oil port, a second oil port, a third oil port, a fourth oil port, a fifth oil port, a sixth oil port and a seventh oil port, and the first compensator and the second compensator each comprise an eighth oil port, a ninth oil port and a tenth oil port; the first oil port of the first main valve and the first oil port of the second main valve are connected to the converging block and the first main oil path, the second oil port and the third oil port of the first main valve are respectively connected to two working ends of the left traveling motor, the second oil port and the third oil port of the second main valve are respectively connected to two working ends of the right traveling motor, the fourth oil port of the first main valve is connected to the eighth oil port and the first control end of the first compensator, the fifth oil port and the sixth oil port of the first main valve are connected to the tenth oil port of the first compensator, the seventh oil port of the first main valve is connected to an oil tank, and the ninth oil port of the first compensator is connected to the first feedback port; the fourth oil port of the second main valve is connected to the eighth oil port and the first control end of the second compensator, the fifth oil port and the sixth oil port of the second main valve are connected to the tenth oil port of the second compensator, the seventh oil port of the second main valve is connected to an oil tank, and the ninth oil port of the second compensator is connected to the first feedback port; the first main valve and the second main valve respectively comprise a first position, a second position and a third position, the first compensator and the second compensator respectively comprise a fourth position and a sixth position, when the first main valve or the second main valve is positioned at the first position, the first oil port of the first main valve or the second main valve is disconnected from the rest oil ports, and the second oil port, the third oil port, the fourth oil port, the fifth oil port and the seventh oil port of the first main valve or the second main valve are mutually communicated; when the first main valve or the second main valve is in the second position, the first oil port and the fourth oil port of the first main valve or the second main valve are communicated, the second oil port and the fifth oil port of the first main valve or the second main valve are communicated, and the third oil port and the seventh oil port of the first main valve or the second main valve are communicated; when the first main valve or the second main valve is in the third position, the first oil port and the fourth oil port of the first main valve or the second main valve are communicated, the second oil port and the seventh oil port of the first main valve or the second main valve are communicated, and the third oil port and the sixth oil port of the first main valve or the second main valve are communicated; when the first compensator or the second compensator is in the fourth position, the eighth oil port, the ninth oil port and the tenth oil port of the first compensator or the second compensator are disconnected with each other; when the first compensator or the second compensator is positioned at the sixth position, the eighth oil port of the first compensator or the eighth oil port of the second compensator is communicated with the ninth oil port, and the eighth oil port of the first compensator or the eighth oil port of the second compensator is communicated with the tenth oil port through a throttling port.
Optionally, the ninth oil port of the first compensator is further connected to the second control end of the first compensator, and the ninth oil port of the second compensator is further connected to the second control end of the second compensator; the first compensator and the second compensator further comprise a fifth position, when the first compensator or the second compensator is positioned at the fifth position, the eighth oil port and the tenth oil port of the first compensator or the second compensator are communicated through a throttling port, and the ninth oil port and the eighth oil port and the tenth oil port of the first compensator or the second compensator are disconnected.
Optionally, the main valve assembly includes first oil inlet and second oil inlet, first oil inlet with the second oil inlet all be connected in first main valve with the first hydraulic fluid port of second main valve, first oil inlet connect in the confluence piece, the second oil inlet pass through first main oil circuit connect in the reposition of redundant personnel piece.
The application also provides a new energy working machine, which comprises the driving device of the new energy working machine.
In the new energy operation machine driving device and the new energy operation machine, the power battery pack is used for supplying energy to the main pump assembly and the auxiliary pump assembly, so that the new energy operation machine driving device is more energy-saving and environment-friendly, and the use cost of a user is greatly reduced; the first actuating mechanism with larger power requirement can be driven by the main pump assembly and the auxiliary pump assembly together during working, so that a duplex pump structure is not needed, the cost is lower, the size is smaller, and the whole machine can be conveniently arranged and installed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a driving device of a construction machine.
Fig. 2 is a schematic view of a part of a driving device of a new energy operation machine according to an embodiment of the present application.
Fig. 3 is a partial enlarged view at II in fig. 2.
Fig. 4 is a partial enlarged view at III in fig. 2.
Fig. 5 is a schematic diagram of the overall structure of a driving device of a new energy operation machine according to an embodiment of the present application.
Fig. 6 is a partial enlarged view of VI in fig. 2.
Reference numerals illustrate:
11-a power battery; 13-a main pump motor; 15-an auxiliary pump motor;
17-a main pump assembly; 171-a first sensing port; 19-a secondary pump assembly;
191-a second sensing port; a main valve assembly 23; 231-a first feedback port;
233-a first main valve; b1-a first oil port; b2-a second oil port;
B3-a third oil port; b4-a fourth oil port; b5-a fifth oil port;
b6-a sixth oil port; b7-a seventh oil port; 235-a second main valve;
237-a first compensator; b8-eighth oil port; b9-a ninth oil port;
b10-a tenth oil port; 238-a second compensator; 240-a second one-way valve;
241-a third one-way valve; 243-fourth check valves; 244-a fifth one-way valve;
247-a first oil inlet; 248-a second oil inlet; 25-a first actuator;
251-left walking motor; 252-right travel motor; 27-a secondary valve;
271-a second feedback port; 29-a power head motor; 31-a main hoisting motor;
33-a powerhead motor; 35-a main hoisting motor; 37-engine;
38-a generator; 40-an external power supply; 42-a first main oil path;
43-a second main oil passage; 44-a third main oil path; 46-confluence blocks;
a1-a first port; a2-a second port; a3-a third port;
a4-fourth port; 47-split blocks; a5-a first split outlet;
A6-a second partial flow port; 471-first one-way valve; 48-shuttle valve.
Detailed Description
Specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the mechanical connection and the electrical connection can be adopted; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements or values and not necessarily for indicating or implying a relative importance or order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.
Referring to fig. 2 to 4, the new energy working machine driving device according to an embodiment of the present invention includes a power battery 11, a main pump motor 13, a sub-pump motor 15, a main pump assembly 17, a sub-pump assembly 19, a main valve assembly 23, a first actuator 25, a sub-valve 27, and a second actuator (not shown). The power battery pack 11 is connected to the main pump motor 13 and the sub-pump motor 15 for supplying power to the main pump motor 13 and the sub-pump motor 15. The main pump motor 13 is used for driving the main pump assembly 17 to work, and the auxiliary pump motor 15 is used for driving the auxiliary pump assembly 19 to work. The main pump assembly 17 is connected to the main valve assembly 23, the main pump assembly 17 being adapted to supply oil to the first actuator 25 via the main valve assembly 23. The secondary pump assembly 19 is connected to the primary valve assembly 23 and the secondary valve 27, the secondary pump assembly 19 being adapted to supply oil to the first actuator 25 together with the primary pump assembly 17 via the primary valve assembly 23 or to supply oil to the second actuator via the secondary valve 27.
In the driving device of the new energy operation machine, the power battery pack supplies energy to the main pump assembly and the auxiliary pump assembly, so that the driving device is more energy-saving and environment-friendly, and the use cost of a user is greatly reduced; the first actuating mechanism with larger power requirement can be driven by the main pump assembly and the auxiliary pump assembly together during working, so that a duplex pump structure is not needed, the cost is lower, the size is smaller, and the whole machine can be conveniently arranged and installed.
In this embodiment, the first executing mechanism 25 includes a left traveling motor 251 and a right traveling motor 252, referring to fig. 5, the new energy operation machine driving device further includes a power head motor 29, a main winding motor 31, a power head motor 33 and a main winding motor 35, and the power battery 11 is connected to the power head motor 29 and the main winding motor 31 for supplying power to the power head motor 29 and the main winding motor 31. The power head motor 29 is used for driving the power head motor 33 to work, and the main winding motor 31 is used for driving the main winding motor 35 to work. Specifically, the power head motor 33 is connected to the power head motor 29 through a speed reducer, and the main hoisting motor 35 is connected to the main hoisting motor 31 through a speed reducer. Because the main winch motor and the power head motor are directly driven by separate motors, the hydraulic pumps for supplying oil to the left walking motor and the right walking motor do not need to supply oil to the main winch motor and the power head motor, and therefore, when the hydraulic pumps for supplying oil to the left walking motor and the right walking motor are selected, a single pump with smaller displacement can be selected, and the cost is lower. It should be understood that the first actuator 25 may be another actuator such as a rotary motor, which is not limited herein.
In this embodiment, the new energy working machine driving device further includes an engine 37 and a generator 38, the engine 37 is connected to the generator 38, the engine 37 is used for driving the generator 38 to work and generate electricity, the generator 38 is connected to the power battery 11, and the generator 38 is used for generating electricity to charge the power battery 11; and/or, the driving device of the new energy operation machine further comprises an external power interface connected to the power battery pack 11, and the external power interface is used for being connected with the external power supply 40 so as to charge the power battery pack 11. In this way, the power battery 11 may supplement the power battery 11 with power via the external power source 40 and/or the generator 38.
In this embodiment, the driving device for the new energy working machine further includes a first main oil path 42, a second main oil path 43, a third main oil path 44 and a converging block 46, the oil outlets of the main pump assembly 17 are respectively connected to the first main oil path 42 and the second main oil path 43, the oil outlet of the auxiliary pump assembly 19 is connected to the third main oil path 44, the first main oil path 42 is connected to the oil inlet of the main valve assembly 23, the second main oil path 43 and the third main oil path 44 are both connected to the converging block 46, the converging block 46 is connected to the oil inlet of the main valve assembly 23, and the converging block 46 is also connected to the auxiliary valve 27. In this way, the pressure oil output from the main pump assembly 17 and the sub pump assembly 19 can be merged and delivered to the main valve assembly 23 at the merging block 46. The oil liquid output by the main pump assembly 17 is split into the first main oil way 42 and the second main oil way 43, part of the oil liquid is converged with the oil liquid output by the auxiliary pump assembly 19 after being converged with the converging block 46, so that the pressure loss can be reduced, the pipeline path is not too large, the arrangement is convenient, and the pipeline bending is particularly convenient.
Specifically, the joining block 46 includes a first port A1, a second port A2, a third port A3, and a fourth port A4, the first port A1 being connected to the oil inlet of the main valve assembly 23, the second port A2 being connected to the sub valve 27, the third port A3 being connected to the second main oil passage 43, and the fourth port A4 being connected to the third main oil passage 44. The confluence block 46 is internally provided with passages to communicate the first port A1, the second port A2, the third port A3 and the fourth port A4, wherein the passage diameter of the portion communicating with the first port A1 is larger than the passage diameter of the portion communicating with the second port A2, the third port A3 and the fourth port A4.
Specifically, the new energy working machine driving device further includes a split block 47, the split block 47 is connected to the oil outlet of the main pump assembly 17, and the first main oil path 42 and the second main oil path 43 are respectively connected to the two oil outlets of the split block 47. Specifically, the split block 47 includes a split inlet, a first split outlet A5 and a second split outlet A6, where the split inlet communicates with the first split outlet A5 and the second split outlet A6 to form two split passages, respectively, the split inlet is connected to the oil outlet of the main pump assembly 17, the first split outlet A5 is connected to the first main oil passage 42, and the second split outlet A6 is connected to the second main oil passage 43. The split block 47 is used for splitting the output flow of the main pump assembly 17, so that the flow rates flowing to the first main oil passage 42 and the second main oil passage 43 can be controlled. In the present embodiment, the flow rates to first main oil passage 42 and second main oil passage 43 may be 50% each, and the distribution of the flow rates may be other as needed. By providing the split block 47, a part of the flow output from the main pump unit 17 can directly flow into the main valve unit 23, and the volume of the split block 46 can be reduced by avoiding an excessive flow reaching the split block 46 to be split.
Specifically, the split block 47 is provided therein with a first check valve 471 that allows only the oil to flow from the split inlet to the first split outlet A5 and the second split outlet A6. By providing the first check valve 471, the reverse flow of oil is avoided.
In this embodiment, the driving device of the new energy working machine further includes a shuttle valve 48, the main pump assembly 17 and the auxiliary pump assembly 19 are hydraulic pumps with load sensitivity, the main valve assembly 23 includes a first feedback port 231, the auxiliary valve 27 includes a second feedback port 271, the main pump assembly 17 includes a first sensing port 171, the auxiliary pump assembly 19 includes a second sensing port 191, the first feedback port 231 and the second feedback port 271 are respectively connected to two input ports of the shuttle valve 48, the second sensing port 191 is connected to an output port of the shuttle valve 48, and the first feedback port 231 is also connected to the first sensing port 171. In this way, the primary pump assembly 17 may adjust the displacement based on the pressure of the first feedback port 231 of the primary valve assembly 23, and the secondary pump assembly 17 may adjust the displacement based on the pressure of the first feedback port 231 of the primary valve assembly 23 or the second feedback port 271 of the secondary valve 27.
Referring to fig. 2 and 6, in the present embodiment, the main valve assembly 23 includes a first main valve 233, a second main valve 235, a first compensator 237 and a second compensator 238, the first main valve 233 and the second main valve 235 are connected to the main pump assembly 17 and the converging block 46, the first main valve 233 is further connected to the first compensator 237 and the left traveling motor 251, and the second main valve 235 is further connected to the second compensator 238 and the right traveling motor 252. The pressure oil output by the main pump assembly 17 passes through the first main valve 233 and the first compensator 237 in sequence and then enters the left travel motor 251, and/or the pressure oil output by the main pump assembly 17 passes through the second main valve 235 and the second compensator 238 in sequence and then enters the right travel motor 252. The pressure oil output by the auxiliary pump assembly 19 passes through the first main valve 233 and the first compensator 237 in sequence and then enters the left traveling motor 251, and/or the pressure oil output by the auxiliary pump assembly 19 passes through the second main valve 235 and the second compensator 238 in sequence and then enters the right traveling motor 252. The first compensator 237 and the second compensator 238 are also connected to the first feedback port 231 to feedback the system pressure to the first sensing port 171 and the second sensing port 191. When the hydraulic control device works, when the hydraulic control device needs to move forwards or backwards leftwards, the first main valve 233 is controlled to switch state, so that the pressure oil output by the main pump assembly 17 and the auxiliary pump assembly 19 passes through the first main valve 233, the first compensator 237 and the first main valve 233 in sequence and then reaches the left traveling motor 251; when the hydraulic oil needs to go forward or backward to the right, the second main valve 235 is controlled to switch state, so that the hydraulic oil output by the main pump assembly 17 and the auxiliary pump assembly 19 passes through the second main valve 235, the second compensator 238 and the second main valve 235 in sequence and then reaches the right traveling motor 252; when the straight line is required to advance or retreat, the first main valve 233 and the second main valve 235 are controlled to switch states, so that the pressure oil output by the main pump assembly 17 and the auxiliary pump assembly 19 passes through the first main valve 233, the first compensator 237 and the first main valve 233 in sequence and reaches the left traveling motor 251, and the pressure oil output by the main pump assembly 17 and the auxiliary pump assembly 19 passes through the second main valve 235, the second compensator 238 and the second main valve 235 in sequence and reaches the right traveling motor 252. By providing the first compensator 237 and the second compensator 238, a steady flow can be achieved, and the pressure flowing into the first actuator 25 can be more stable, thereby making the action of the first actuator 25 more stable.
Specifically, the first main valve 233 and the second main valve 235 each include a first oil port B1, a second oil port B2, a third oil port B3, a fourth oil port B4, a fifth oil port B5, a sixth oil port B6, and a seventh oil port B7, and the first compensator 237 and the second compensator 238 each include an eighth oil port B8, a ninth oil port B9, and a tenth oil port B10. The first ports B1 of the first main valve 233 and the second main valve 235 are connected to the first port A1 of the merging block 46 and the first main oil passage 42, the second ports B2 and the third ports B3 of the first main valve 233 are connected to the two working ends of the left traveling motor 251, respectively, and the second ports B2 and the third ports B3 of the second main valve 235 are connected to the two working ends of the right traveling motor 252, respectively. The fourth port B4 of the first main valve 233 is connected to the eighth port B8 and the first control end of the first compensator 237, the fifth port B5 and the sixth port B6 of the first main valve 233 are connected to the tenth port B10 of the first compensator 237, the seventh port B7 of the first main valve 233 is connected to the oil tank, and the ninth port B9 of the first compensator 237 is connected to the first feedback port 231 and the second control end of the first compensator 237. The fourth port B4 of the second main valve 235 is connected to the eighth port B8 and the first control end of the second compensator 238, the fifth port B5 and the sixth port B6 of the second main valve 235 are connected to the tenth port B10 of the second compensator 238, the seventh port B7 of the second main valve 235 is connected to the oil tank, and the ninth port B9 of the second compensator 238 is connected to the first feedback port 231 and the second control end of the second compensator 238. The first main valve 233 and the second main valve 235 each include a first position, a second position, and a third position, the first compensator 237 and the second compensator 238 each include a fourth position, a fifth position, and a sixth position, and when the first main valve 233 or the second main valve 235 is in the first position (e.g., the middle position in fig. 6), the first port B1 of the first main valve 233 or the second main valve 235 is disconnected from the remaining ports, and the second port B2, the third port B3, the fourth port B4, the fifth port B5, and the seventh port B7 of the first main valve 233 or the second main valve 235 are communicated with each other; when the first main valve 233 or the second main valve 235 is in the second position (for example, the lower position in fig. 6), the first port B1 and the fourth port B4 of the first main valve 233 or the second main valve 235 communicate, the second port B2 and the fifth port B5 of the first main valve 233 or the second main valve 235 communicate, and the third port B3 and the seventh port B7 of the first main valve 233 or the second main valve 235 communicate; When the first main valve 233 or the second main valve 235 is in the third position (for example, the upper position in fig. 6), the first port B1 and the fourth port B4 of the first main valve 233 or the second main valve 235 are communicated, the second port B2 and the seventh port B7 of the first main valve 233 or the second main valve 235 are communicated, and the third port B3 and the sixth port B6 of the first main valve 233 or the second main valve 235 are communicated; when the first compensator 237 or the second compensator 238 is in the fourth position (i.e., the upper position in fig. 6), the eighth port B8, the ninth port B9, and the tenth port B10 of the first compensator 237 or the second compensator 238 are disconnected from each other; When the first compensator 237 or the second compensator 238 is in the fifth position (i.e., the middle position in fig. 6), the eighth port B8 and the tenth port B10 of the first compensator 237 or the second compensator 238 are communicated through the orifice, and the ninth port B9 of the first compensator 237 or the second compensator 238 is disconnected from both the eighth port B8 and the tenth port B10; when the first compensator 237 or the second compensator 238 is in the sixth position (i.e., the lower position in fig. 6), the eighth port B8 and the ninth port B9 of the first compensator 237 or the second compensator 238 are communicated, and the eighth port B8 and the tenth port B10 of the first compensator 237 or the second compensator 238 are communicated through the restriction. the first control terminal of the first compensator 237 is configured to switch the first compensator 237 from the fourth position to the sixth position when the pressure oil is applied, and the second control terminal of the first compensator 237 is configured to switch the first compensator 237 from the sixth position to the fifth position when the pressure oil is applied. The first control terminal of the second compensator 238 is configured to switch the second compensator 238 from the fourth position to the sixth position when the pressure oil is applied, and the second control terminal of the second compensator 238 is configured to switch the second compensator 238 from the sixth position to the fifth position when the pressure oil is applied.
Specifically, a second check valve 240 is disposed between the tenth port B10 of the first compensator 237 and the fifth port B5 of the first main valve 233, and a third check valve 241 is disposed between the tenth port B10 of the first compensator 237 and the sixth port B6 of the first main valve 233. A fourth check valve 243 is provided between the tenth port B10 of the second compensator 238 and the fifth port B5 of the second main valve 235, and a fifth check valve 244 is provided between the tenth port B10 of the second compensator 238 and the sixth port B6 of the second main valve 235.
Specifically, when the first main valve 233 is in the first position (middle position), the pressure oil output by the main pump assembly 17 and the auxiliary pump assembly 19 cannot enter the first main valve 233, that is, no pressure oil reaches the first actuator 25, the first actuator is not operated, and the oil in the pipeline between the first main valve 233 and the first actuator 25 flows back to the oil tank to realize oil return. When the first main valve 233 is in the second position (lower position), the pressure oil output by the main pump assembly 17 and the auxiliary pump assembly 19 enters the first main valve 233 through the first oil port B1, part of the oil reaches the first control end of the first compensator 237, the first compensator 237 is reversed from the fourth position (upper position) to the sixth position (lower position) through the fifth position (middle position), so that the eighth oil port B8 and the tenth oil port B10 are communicated, the oil enters the first compensator 237 from the eighth oil port B8, reaches the fifth oil port B5 through the second check valve 240, reaches one end of the left traveling motor 251 through the second oil port B2, and rotates the left traveling motor 251 in the first direction (e.g., forward rotation), so that the traveling mechanism moves leftwards (e.g., advances leftwards), and the oil at the other end of the left traveling motor 251 flows back to the oil tank through the third oil port B3 and the seventh oil port B7. When the first main valve 233 is in the third position (upper position), the pressure oil output by the main pump assembly 17 and the auxiliary pump assembly 19 enters the first main valve 233 through the first oil port B1, part of the oil reaches the first control end of the first compensator 237, the first compensator 237 is reversed from the fourth position (upper position) to the sixth position (lower position) through the fifth position (middle position), so that the eighth oil port B8 and the tenth oil port B10 are communicated, the oil enters the first compensator 237 from the eighth oil port B8, reaches the sixth oil port B6 through the third check valve 241, reaches the other end of the left traveling motor 251 through the third oil port B3, and makes the left traveling motor 251 rotate in the third direction (e.g., reverse), so that the traveling mechanism moves leftwards (e.g., retreats leftwards) while the oil at one end of the left traveling motor 251 flows back to the oil tank through the second oil port B2 and the seventh oil port B7. The fifth bit of the first compensator 237 is a transition bit, and the first compensator 237 is normally stably operated in the sixth bit during operation. When the oil pressure is too high, the ninth oil port B9 is connected to the second control end of the first compensator 237, so that the first compensator 237 can be automatically switched to the fifth position by the excessive oil pressure, the output oil pressure of the first compensator 237 can be reduced by setting the throttle, and the first compensator can be switched to the sixth position after the pressure is stable.
The operation mechanism of the second main valve 235 and the second compensator 238 driving the right travel motor 252 is the same as the operation mechanism of the first main valve 233 and the first compensator 237 driving the left travel motor 251, and will not be described again.
In this embodiment, the main valve assembly 23 includes a first oil inlet 247 and a second oil inlet 248, the first oil inlet 247 and the second oil inlet 248 are connected to the first oil ports B1 of the first main valve 233 and the second main valve 235, the first oil inlet 247 is connected to the first port A1 of the merging block 46, and the second oil inlet 248 is connected to the first split outlet A5 of the split block 47 through the first main oil path 42. Thus, the main valve assembly 23 is provided with two oil inlets, so that the internal flow passage of the main valve assembly 23 is smaller, the volume of the main valve assembly 23 is reduced, and the manufacturing cost is reduced.
The following briefly describes the operation principle of the driving device of the new energy working machine of the present embodiment.
When an operation member (such as a foot valve or an operation handle) is operated to the left or the right, a split block 47 connected to an oil outlet of the main pump assembly 17 divides an oil passage into two paths, one path is from a first split outlet A5 of the split block 47 to a first main valve 233 through a first main oil passage 42, the other path is from a second split outlet A6 of the split block 47 to a third port A3 of the merging block 46 through a second main oil passage 43, oil of the sub pump assembly 19 is from the third main oil passage 44 to a fourth port A4 of the merging block 46, oil of the second main oil passage 43 and the third main oil passage 44 is merged at the merging block 46 and then flows out from the first port A1 of the merging block 46 to the first main valve 233, at this time, the first main valve 233 moves upward or downward under the effect of a pilot pressure, the oil passage is from the second check valve 240 or the third check valve 241 to the left travel motor 251, the oil is returned to the oil tank after the oil is discharged from the left travel motor 251 through the first main valve 233, meanwhile, the feedback oil path is directly connected to the first sensing port 171 of the main pump assembly 17 after upward movement of the first compensator 237, and reaches the port X3 of the shuttle valve 48, so that the shuttle valve 48 moves, oil discharged from the port X5 of the shuttle valve 48 reaches the second sensing port 191 of the auxiliary pump assembly 19, the first sensing port 171 is connected to the first regulator 173 of the main pump assembly 17, the second sensing port 191 is connected to the second regulator 193 of the auxiliary pump assembly 19, if the sum of the flow rates output by the main pump assembly 17 and the auxiliary pump assembly 19 is larger than the flow rate of the first main valve 233 at this time, the differential pressure becomes larger, the first regulator 173 moves rightward, so that pressure oil enters the right side of the first cylinder 175, the piston rod is pushed to extend against the spring force, the variable rod rotates clockwise, the swing angle becomes smaller, namely the displacement of the main pump assembly 17 is reduced, meanwhile, the second regulator 193 moves rightward, so that the pressure oil enters the large cavity of the second cylinder 195, the piston rod stretches out, so that the variable rod rotates in reverse time, the swing angle is reduced, the displacement of the auxiliary pump assembly 19 is reduced until the output flow of the main pump assembly 17 and the auxiliary pump assembly 19 is consistent with the flow of the first main valve 233; when the load pressure becomes large, the differential pressure becomes large, the first regulator 173 will move leftward, so that the oil on the right side of the first cylinder 175 is discharged, the spring is recovered to be long, the piston rod is contracted, the variable rod is rotated in reverse time, the swing angle becomes large, namely, the displacement of the main pump assembly 17 is increased, meanwhile, the second regulator 193 moves leftward, so that the oil on the large cavity of the second cylinder 195 is discharged, the piston rod is contracted, the variable rod is rotated clockwise, the swing angle becomes large, and the displacement of the auxiliary pump assembly 19 is increased.
When the operation member is operated to the right or the front or the back, the oil path is divided into two paths by the split block 47 connected to the oil outlet of the main pump assembly 17, one path reaches the first main valve 233 from the first split outlet A5 of the split block 47 through the first main oil path 42, the other path reaches the third port A3 of the merging block 46 from the second split outlet A6 of the split block 47 through the second main oil path 43, the oil of the auxiliary pump assembly 19 reaches the fourth port A4 of the merging block 46 through the third main oil path 44, the oil of the second main oil path 43 and the third main oil path 44 is merged at the merging block 46 and then flows out from the first port A1 of the merging block 46 to the first main valve 233, at this time, the first main valve 233 moves upward or downward under the effect of the pilot pressure, the oil path reaches the right travel motor 252 through the fourth one-way valve 243 or the fifth one-way valve 244, the oil discharged from the right travel motor 252 returns to the oil tank after passing through the second main valve 235, simultaneously, the feedback oil path is directly connected to the first sensing port 171 of the main pump assembly 17 after upwards moving through the second compensator 238, and simultaneously reaches the X3 port of the shuttle valve 48, so that the shuttle valve 48 moves, the X5 oil discharged from the shuttle valve 48 reaches the second sensing port 191 of the auxiliary pump assembly 19, the first sensing port 171 is connected to the first regulator 173 of the main pump assembly 17, the second sensing port 191 is connected to the second regulator 193 of the auxiliary pump assembly 19, if the sum of the flow rates output by the main pump assembly 17 and the auxiliary pump assembly 19 is larger than the flow rate of the first main valve 233 at this time, the differential pressure becomes larger, the first regulator 173 moves rightwards, so that the pressure oil enters the right side of the first oil cylinder 175, the piston rod is pushed to extend against the spring force, the variable rod rotates clockwise, the swing angle becomes smaller, namely the displacement of the main pump assembly 17 is reduced, simultaneously, the second regulator 193 moves rightwards, so that the pressure oil enters the large cavity of the second oil cylinder 195, the piston rod extends out, the variable lever rotates in reverse time, the swing angle is reduced, the displacement of the auxiliary pump assembly 19 is reduced until the output flow of the main pump assembly 17 and the auxiliary pump assembly 19 is consistent with the flow of the first main valve 233; when the load pressure becomes large, the differential pressure becomes large, the first regulator 173 will move leftward, so that the oil on the right side of the first cylinder 175 is discharged, the spring is recovered to be long, the piston rod is contracted, the variable rod is rotated in reverse time, the swing angle becomes large, namely, the displacement of the main pump assembly 17 is increased, meanwhile, the second regulator 193 moves leftward, so that the oil on the large cavity of the second cylinder 195 is discharged, the piston rod is contracted, the variable rod is rotated clockwise, the swing angle becomes large, and the displacement of the auxiliary pump assembly 19 is increased.
When the operation member is operated to perform forward or backward straight traveling operation, the valve block 1 connected to the oil outlet of the main pump divides the oil passage into two paths, the split block 47 connected to the oil outlet of the main pump assembly 17 divides the oil passage into two paths, one path reaches the first main valve 233 and the second main valve 235 from the first split outlet A5 of the split block 47 via the first main oil passage 42, the other path reaches the third port A3 of the merging block 46 from the second split outlet A6 of the split block 47 via the second main oil passage 43, the oil of the auxiliary pump assembly 19 reaches the fourth port A4 of the merging block 46 via the third main oil passage 44, the oil of the second main oil passage 43 and the third main oil passage 44 flows out from the first port A1 of the merging block 46 to the same first main valve 233 and the second main valve 235 at this time, the first main valve 233 and the second main valve 235 move upward or downward simultaneously under the action of the pilot pressure, the oil path reaches the left travel motor 251 and the right travel motor 252 through the second check valve 240 or the third check valve 241 and the fourth check valve 243 or the fifth check valve 244, the oil discharged from the left travel motor 251 and the right travel motor 252 respectively pass through the first main valve 233 and the second main valve 235 and then return to the oil tank, the feedback oil path moves upwards through the first compensator 237 and the second compensator 238 and then merges, the feedback oil path is directly connected to the first sensing port 171 of the main pump assembly 17, and reaches the port X3 of the shuttle valve 48, so that the shuttle valve 48 moves, the oil discharged from the port X5 of the shuttle valve 48 reaches the second sensing port 191 of the auxiliary pump assembly 19, the first sensing port 171 is connected to the first regulator 173 of the main pump assembly 17, the second sensing port 191 is connected to the second regulator 193 of the auxiliary pump assembly 19, the working condition is the working condition with the maximum travel flow rate requirement, when the load pressure becomes large, the pressure difference becomes large, the first regulator 173 moves leftwards, the oil on the right side of the first cylinder 175 is discharged, the spring recovers to be long, the piston rod contracts, the variable rod rotates in reverse time, the swing angle is increased, namely the displacement of the pump is increased, meanwhile, the second regulator 193 moves leftwards, the oil in the large cavity of the second oil cylinder 195 is discharged, the piston rod contracts, the variable rod rotates clockwise, the swing angle is increased, the displacement of the auxiliary pump assembly 19 is increased, and the full flow output of the main pump assembly 17 and the auxiliary pump assembly 19 is achieved; if the operating member is operated at this time to slow the traveling speed, the stroke of the operating member is shortened, the opening of the first main valve 233 and the second main valve 235 is reduced, the pressure difference between the front and rear valves of the first main valve 233 and the second main valve 235 is increased, the first regulator 173 is moved rightward, so that the pressure oil enters the right side of the first cylinder 175, the piston rod is pushed to extend against the spring force, the variable rod is rotated clockwise, the swing angle is reduced, that is, the displacement of the main pump assembly 17 is reduced, and simultaneously, the second regulator 193 is moved rightward, so that the pressure oil enters the large cavity of the second cylinder 195, the piston rod extends, the variable rod is rotated counterclockwise, the swing angle is reduced, the displacement of the auxiliary pump drunk driving case 19 is reduced, and the output flow until the main pump assembly 17 and the auxiliary pump assembly 19 are consistent with the communication flow of the first main valve 233 and the second main valve 235.
When the pressurizing oil cylinder is operated to act or rotate, the valve core of the auxiliary valve 27 moves, the oil outlet of the auxiliary pump assembly 19 reaches the converging block 46, the main pump assembly 17 does not work at this time, the valve cores of the first main valve 233 and the second main valve 235 of the main valve assembly 23 are not moved, and the oil outlet of the oil from the second port A2 of the converging block 46 reaches the oil inlet P of the auxiliary valve 27 until reaching the second executing mechanism connected with each auxiliary valve 27; meanwhile, the feedback oil path flows out to the X4 port of the shuttle valve 48 through the second feedback port 271 of the auxiliary valve 27, at this time, the oil path on the right side of the shuttle valve 48 is conducted, so that the oil path reaches the second sensing port 191 of the auxiliary pump assembly 19 from the X5 of the shuttle valve 48, and the second regulator 193 of the auxiliary pump assembly 19 is controlled by the magnitude of the feedback pressure to regulate the displacement of the auxiliary pump assembly 19.
The application also provides a new energy working machine, which comprises the driving device of the new energy working machine. It is understood that the work machine may be a rotary drilling machine, an excavator, or the like.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Accordingly, the scope of the application should be determined from the following claims.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576107A (en) * | 2009-06-01 | 2009-11-11 | 浙江大学 | Energy recovery device in shield duct piece assembling driving system |
| CN102418354A (en) * | 2011-10-28 | 2012-04-18 | 华侨大学 | Drive system of hybrid hydraulic excavator based on pump/motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203428832U (en) * | 2013-08-21 | 2014-02-12 | 上海中联重科桩工机械有限公司 | Double hoist control system and construction machinery |
| CN104214150B (en) * | 2014-06-04 | 2016-03-23 | 上海中联重科桩工机械有限公司 | Double hoist hydraulic control system and construction machinery with it |
| CN104179754B (en) * | 2014-08-07 | 2017-02-01 | 常州万安汽车部件科技有限公司 | Oiling air exhausting system |
| CN107237789B (en) * | 2017-07-12 | 2018-10-12 | 上海中联重科桩工机械有限公司 | Hydraulic system and creeper undercarriage with the hydraulic system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576107A (en) * | 2009-06-01 | 2009-11-11 | 浙江大学 | Energy recovery device in shield duct piece assembling driving system |
| CN102418354A (en) * | 2011-10-28 | 2012-04-18 | 华侨大学 | Drive system of hybrid hydraulic excavator based on pump/motor |
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