A new energy vehicle thermal management water pump permanent magnet motor reliability test device

Abstract

The application discloses a new energy vehicle thermal management water pump permanent magnet motor reliability test device, and relates to the technical field of test devices. Including test table, the test table is provided with test motor, the output shaft of test motor is connected with speed reducer, the output shaft of speed reducer is connected with transmission shaft through coupling, the transmission shaft is connected with connecting cylinder, the connecting cylinder is connected with the output shaft of permanent magnet motor, the outer side of permanent magnet motor is installed with heat preservation cover, the heat preservation cover is sleeved with sleeve, the lower side of permanent magnet motor is provided with fixed plate, the lower side of fixed plate is installed with vibration spring, the lower side of vibration spring is installed with sliding plate, the lower side of sliding plate is installed with horizontal module, the heating pipe and refrigeration pipe in heat preservation cover are used for alternately heating and refrigerating permanent magnet motor, so that permanent magnet motor alternately exists in high temperature and low temperature state, and the reliability of test permanent magnet motor under different temperatures is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test devices, and particularly relates to a permanent magnet motor reliability test device for a water pump for new energy vehicle thermal management. BACKGROUND

[0002] ‌Permanent magnet motors have been widely used in new energy vehicles, aerospace, industrial automation and other fields due to their high efficiency, high power density and excellent speed regulation performance. The driving system of a permanent magnet motor can be divided into three categories: constant speed driving, speed regulation driving and precision control driving, which puts higher requirements on the reliability of the motor.

[0003] The existing permanent magnet motor reliability test device mainly has the following problems: (1) the temperature test and the vibration test are independent of each other, and the reliability of the permanent magnet motor at different temperatures cannot be determined, (2) the frequency of the vibration cannot be adjusted, and the test requirements of different permanent magnet motors cannot be met. SUMMARY

[0004] The present application aims to provide a permanent magnet motor reliability test device for a water pump for new energy vehicle thermal management to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a permanent magnet motor reliability test device for a water pump for new energy vehicle thermal management, comprising a test table, wherein the test table is provided with a test motor, the output shaft of the test motor is connected with a speed reducer, the output shaft of the speed reducer is connected with a transmission shaft through a shaft coupling, the transmission shaft is connected with a connecting cylinder, the connecting cylinder is connected with the output shaft of a permanent magnet motor, a heat preservation cover is installed outside the permanent magnet motor, a sleeve is sleeved in the heat preservation cover, a fixed plate is arranged on the lower side of the permanent magnet motor, a vibration spring is installed below the fixed plate, a sliding plate is installed below the vibration spring, and a horizontal module is installed below the sliding plate.

[0006] The upper side of the sliding plate is provided with a fixed cylinder, and an electromagnetic plate and a conveying plate are slidably installed on the upper side and the lower side of the fixed cylinder, respectively, a partition plate is arranged in the middle of the fixed cylinder, a second coil is embedded in the partition plate, the two ends of the second coil are electrically connected with a control system, a reset spring is connected between the conveying plate and the test table, and the two ends of the reset spring are electrically connected with the control system.

[0007] The magnetic shielding plate separates the magnetic field of the second coil and the magnetic field of the reset spring, the inside of the upper side of the conveying plate is provided with a vortex flow channel, the middle of the conveying plate is provided with a magnetic shielding plate, the vortex flow channel is provided with a vortex shaft, the vortex shaft is made of magnetic material, the vortex shaft is located in the magnetic field of the second coil, the fixed cylinder is provided with an air inlet and an air outlet, the air inlet and the air outlet are connected with the inlet and the outlet of the vortex flow channel through the hoses respectively, and one-way valves are arranged in the air inlet and the air outlet.

[0008] The lower side of the fixed plate is provided with a vibrating cylinder, the vibrating cylinder is installed on an electromagnetic plate, the electromagnetic plate is electrically connected with a control system, the electromagnetic plate generates a magnetic field after being powered on, and the electromagnetic plate and the partition plate are connected with a first spring.

[0009] The temperature control chamber is formed between the heat preservation cover and the sleeve, the air inlet is connected with a gas supply system through a pipeline, the gas supply system is installed on a test bench, the gas supply system delivers air into the air inlet, the temperature control chamber is sequentially provided with a heating pipe and a refrigeration pipe, the air outlet communicates with the inlet of the heating pipe and the inlet of the refrigeration pipe through the heat preservation cover respectively, and the heating pipe and the refrigeration pipe are spirally distributed;

[0010] The inlet of the heating pipe and the inlet of the refrigeration pipe are both provided with an electromagnetic valve and a flowmeter, and the outlet of the heating pipe and the outlet of the refrigeration pipe both communicate with external air through the pipeline.

[0011] The heating pipe and the refrigeration pipe are provided with a temperature compensation wire, the temperature compensation wire is composed of a metal wire and two semiconductor wires made of different materials, one end of the two semiconductor wires is connected with the metal wire, and the two semiconductor wires are electrically connected with a control system through wires; the temperature compensation wire in the heating pipe is a heating end of the Peltier effect, and the temperature compensation wire in the refrigeration pipe is a refrigeration end of the Peltier effect.

[0012] Temperature sensors are installed on the heating pipe, the refrigeration pipe and the sleeve, and the temperature sensors are electrically connected with the control system.

[0013] The speed reducer and the connecting cylinder are both installed on the test bench, the transmission shaft is slidably installed with a driving disc through a spline, the driving disc is located in the connecting cylinder, the driving disc and the transmission shaft are connected with an abutting spring, one side of the driving disc is installed with a driven disc, the driven disc is rotatably installed on the connecting cylinder, a plurality of clamping plates are slidably installed in the middle of the driven disc, the clamping plates and the driven disc are connected with clamping springs, and the plurality of clamping plates clamp the output shaft of the permanent magnet motor.

[0014] The opposite side of the driving disc and the driven disc is respectively provided with a ratchet tooth shape, the driving disc is provided with a magnetic material, a first coil is embedded in the connecting cylinder outside the magnetic material, and the two ends of the first coil are electrically connected with a control system.

[0015] The heat preservation cover is arranged on the fixed plate through buckling, the vibration springs are arranged in groups, the vibration springs are connected with the fixed plate and the sliding plate respectively, and the vibration springs are located outside the fixed cylinder.

[0016] The heat preservation cover is provided with a through hole, and the output shaft of the permanent magnet motor passes through the through hole.

[0017] The lateral module comprises a lateral electric cylinder, the lateral electric cylinder is installed on the test bench, the telescopic rod of the lateral electric cylinder is connected with the sliding plate, the sliding plate is slidably connected with the test bench through a sliding block and a guide rail, and the sliding block and the guide rail are arranged on the sliding plate and the test bench respectively.

[0018] The left and right sides of the clamping plates are provided with inclined edges, the front sides of the clamping plates are made of rubber material, and the rubber material is in contact with the output shaft of the permanent magnet motor.

[0019] The test bench is provided with a control box, and the control box is provided with a control system.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1. Temperature test and vibration test are carried out at the same time, and the reliability of the permanent magnet motor is more accurately reflected. The air supply system delivers air to the heating pipe and the refrigeration pipe respectively, so that the heating pipe and the refrigeration pipe alternately heat and cool the permanent magnet motor, so that the permanent magnet motor is in a state of continuous alternation of high temperature and low temperature, and the reliability of the permanent magnet motor is tested under vibration at different temperatures, which can accurately reflect the reliability of the permanent magnet motor.

[0022] 2. Vibration frequency adjustment processing is carried out to meet the test requirements of different permanent magnet motors. The control system can adjust the on-off cycle of the second coil to realize the adjustment of the vibration frequency, and the shorter the on-off cycle, the faster the vibration frequency of the permanent magnet motor, so as to face different permanent magnet motors with different test requirements, and reflect the reliability of the permanent magnet motor through vibration test.

[0023] 3, By heating air and refrigeration air, the permanent magnet motor is in a high temperature and low temperature state to carry out reliability test. The vortex shaft in the conveying plate follows away from the second coil, the magnetic moment in the vortex shaft forms a disordered arrangement under the influence of the magnetocaloric effect, resulting in an increase in magnetic entropy and a decrease in temperature; the air supply system delivers the external air to the air inlet after pressurizing, the air enters the vortex flow channel through the air inlet, the vortex shaft continuously contacts the air, the vortex shaft pre-cools the air, the pre-cooled air is delivered to the air outlet through the outlet of the vortex flow channel and the pipeline, and the pre-cooled air enters the refrigeration pipe through the air outlet; when the flow meter in the refrigeration pipe detects the pre-cooled air, the control system connects the two different materials of the semiconductor wire in the refrigeration pipe to the power supply, the refrigeration end of the Peltier in the refrigeration pipe, the pre-cooled air is cooled again, the air is cooled to the set temperature, and the cooled air cools the permanent magnet motor through the sleeve, so that the permanent magnet motor is in a low temperature state, and the preheating and refrigeration end refrigeration treatment quickly makes the permanent magnet motor in a low temperature state to meet the test requirements. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of the whole of the application;

[0025] Figure 2 It is the structure schematic diagram of the heat preservation cover in the application;

[0026] Figure 3 It is the structure schematic diagram of the connecting cylinder in the application;

[0027] Figure 4 It is the structure schematic diagram of the transverse electric cylinder in the application;

[0028] Figure 5 It is the structure schematic diagram of the driven disc in the application;

[0029] Figure 6 It is the structure schematic diagram of the reset spring in the application;

[0030] Figure 7 It is the structure schematic diagram of the fixed plate in the application;

[0031] Figure 8 It is Figure 7 The local enlarged view of A area in the application;

[0032] Figure 9 It is the structure schematic diagram of the vortex shaft in the application;

[0033] Figure 10 It is the structure schematic diagram of the heating pipe in the application.

[0034] In the diagram: 1. Control box; 11. Test bench; 12. Test motor; 13. Reducer; 14. Drive shaft; 141. Driven disc; 15. Connecting cylinder; 151. First coil; 16. Driven disc; 161. Clamping plate; 2. Permanent magnet motor; 21. Fixed plate; 211. Vibrating cylinder; 22. Vibrating spring; 23. Sliding plate; 231. Fixed cylinder; 232. Electromagnetic plate; 233. Conveying plate; 234. Second coil; 235. Return spring; 236. Scroll shaft; 237. Air inlet; 238. Air outlet; 3. Insulation cover; 301. Sleeve; 31. Heating pipe; 32. Cooling pipe; 33. Compensating wire; 4. Horizontal electric cylinder. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example: Figures 1-10 As shown, this invention provides a technical solution for a reliability testing device for a permanent magnet motor used in a thermal management water pump for new energy vehicles. The device includes a test bench 11, on which a test motor 12 is mounted. The output shaft of the test motor 12 is connected to a reducer 13. The output shaft of the reducer 13 is connected to a drive shaft 14 via a coupling. The drive shaft 14 is connected to a connecting cylinder 15. The connecting cylinder 15 is connected to the output shaft of the permanent magnet motor 2. A heat insulation cover 3 is installed on the outside of the permanent magnet motor 2. A sleeve 301 is fitted inside the heat insulation cover 3. A [further details about the device are missing]. There is a fixed plate 21, a vibration spring 22 is installed below the fixed plate 21, a sliding plate 23 is installed below the vibration spring 22, and a transverse module is installed below the sliding plate 23. A control box 1 is set on the test bench 11, and a control system is set inside the control box 1. The transverse module includes a transverse electric cylinder 4, which is installed on the test bench 11. The telescopic rod of the transverse electric cylinder 4 is connected to the sliding plate 23. The sliding plate 23 is slidably connected to the test bench 11 through a slider and a guide rail. The slider and the guide rail are respectively set on the sliding plate 23 and the test bench 11.

[0037] The upper side of the sliding plate 23 is provided with a fixed cylinder 231, the upper side and the lower side of the inside of the fixed cylinder 231 are slidably installed with an electromagnetic plate 232 and a conveying plate 233 respectively, the middle part of the fixed cylinder 231 is provided with a partition plate, the second coil 234 is embedded in the partition plate, the two ends of the second coil 234 are electrically connected with the control system, the conveying plate 233 is connected with the reset spring 235 between the test bench 11, and the two ends of the reset spring 235 are electrically connected with the control system; the magnetic shielding plate separates the magnetic field of the second coil 234 and the magnetic field of the reset spring 235, the inside of the upper side of the conveying plate 233 is provided with a vortex flow channel, the middle part of the conveying plate 233 is provided with a magnetic shielding plate, the vortex shaft 236 is arranged in the vortex flow channel, the vortex shaft 236 is made of magnetic material, the vortex shaft 236 is located in the magnetic field of the second coil 234, the fixed cylinder 231 is provided with the air inlet 237 and the air outlet 238, the air inlet 237 and the air outlet 238 are connected with the inlet and the outlet of the vortex flow channel through the hoses respectively, and the air inlet 237 and the air outlet 238 are provided with one-way valves.

[0038] The lower side of the fixed plate 21 is provided with a vibrating cylinder 211, the vibrating cylinder 211 is installed on the electromagnetic plate 232, the electromagnetic plate 232 is electrically connected with the control system, the electromagnetic plate 232 generates a magnetic field after being electrified, and the first spring is connected between the electromagnetic plate 232 and the partition plate.

[0039] The temperature control chamber is formed between the heat preservation cover 3 and the sleeve 301, the air inlet 237 is connected with the air supply system (not shown in the figure) through the pipeline, the air supply system is installed on the test bench 11, the air supply system conveys air into the air inlet 237, the heating pipe 31 and the refrigeration pipe 32 are sequentially arranged in the temperature control chamber, the air outlet 238 passes through the heat preservation cover 3 through the pipeline and is in communication with the inlet of the heating pipe 31 and the inlet of the refrigeration pipe 32 respectively, and the heating pipe 31 and the refrigeration pipe 32 are spirally distributed; the electromagnetic valve and the flow meter are installed in the inlets of the heating pipe 31 and the refrigeration pipe 32, and the outlets of the heating pipe 31 and the refrigeration pipe 32 are in communication with the external air through the pipeline passing through the heat preservation cover 3.

[0040] The heating pipe 31 and the refrigeration pipe 32 are provided with the temperature compensation wire 33, the temperature compensation wire 33 is composed of a metal wire and two semiconductor wires of different materials, one end of the two semiconductor wires of different materials is connected with the metal wire, and the two semiconductor wires of different materials are electrically connected with the control system through wires; the temperature compensation wire 33 in the heating pipe 31 is a heating end of the Peltier effect, the temperature compensation wire 33 in the refrigeration pipe 32 is a refrigeration end of the Peltier effect; the temperature sensor is installed on the heating pipe 31, the refrigeration pipe 32 and the sleeve 301, and the temperature sensor is electrically connected with the control system.

[0041] The speed reducer 13 and the connecting barrel 15 are both installed on the test table 11, the transmission shaft 14 is in sliding connection with the driving disc 141 through the spline, the driving disc 141 is located in the connecting barrel 15, the abutting spring is connected between the driving disc 141 and the transmission shaft 14, the driving disc 141 is installed on one side of the driven disc 16, the driven disc 16 is rotatably installed on the connecting barrel 15, a plurality of clamping plates 161 are slidingly installed in the middle of the driven disc 16, the clamping spring is connected between the clamping plate 161 and the driven disc 16, and the plurality of clamping plates 161 clamp the output shaft of the permanent magnet motor 2; the opposite sides of the driving disc 141 and the driven disc 16 are respectively provided with ratchet teeth, the driving disc 141 is provided with a magnetic material, the first coil 151 is embedded in the connecting barrel 15 outside the magnetic material, and the two ends of the first coil 151 are electrically connected with the control system; the left and right sides of the plurality of clamping plates 161 are both provided with bevels, the front side of the plurality of clamping plates 161 is made of rubber material, and the rubber material is in contact with the output shaft of the permanent magnet motor 2.

[0042] The heat preservation cover 3 is arranged on the fixed plate 21 through buckling, the vibration springs 22 are arranged in multiple groups, the multiple groups of vibration springs 22 respectively connect the fixed plate 21 and the sliding plate 23, and the multiple groups of vibration springs 22 are located outside the fixed barrel 231; the heat preservation cover 3 is provided with a through hole, and the output shaft of the permanent magnet motor 2 penetrates through the through hole.

[0043] Working principle: the starting button on the control box 1 is pressed, the test device is started, the heat preservation cover 3 is removed, the permanent magnet motor 2 is installed on the fixed plate 21, and finally the heat preservation cover 3 is installed on the test table 11, and a gasket is arranged between the heat preservation cover 3 and the output shaft of the permanent magnet motor 2, the installation mode of the permanent magnet motor 2 and the gasket are prior art, the control system drives the sliding plate 23 to move forward through the transverse electric cylinder 4, the sliding plate 23 drives the fixed plate 21 to move forward through the fixed barrel 231 and the vibration barrel 211, the fixed plate 21 drives the output shaft of the permanent magnet motor 2 to be inserted into the middle position of the multiple groups of clamping plates 161, the multiple groups of clamping plates 161 clamp and position the output shaft of the permanent magnet motor 2, the multiple groups of clamping plates 161 simultaneously compress the clamping springs, the multiple groups of clamping plates 161 can adapt to permanent magnet motors 2 with different output shaft diameters, and have strong versatility.

[0044] When the output shaft of the permanent magnet motor 2 is positioned by the multiple sets of clamping plates 161, the encoder in the transverse electric cylinder 4 feeds data back to the control system, the control system energizes the first coil 151, the first coil 151 generates a magnetic field after being energized, the magnetic field of the first coil 151 repels the magnetic field of the magnetic material on the driving disc 141, under the repulsion force, the driving disc 141 moves in the direction of the driven disc 16, so that the ratchet teeth on the opposite sides of the driving disc 141 and the driven disc 16 are engaged with each other, so as to drive the driven disc 16 by the driving disc 141, the driving disc 141 simultaneously stretches the abutting spring, the control system drives the transmission shaft 14 to rotate through the test motor 12 and the speed reducer 13, the transmission shaft 14 drives the driving disc 141 to rotate, the driving disc 141 drives the driven disc 16 to rotate through the ratchet teeth, and the driven disc 16 drives the output shaft of the permanent magnet motor 2 to rotate through the multiple sets of clamping plates 161, so that the permanent magnet motor 2 works at a set speed and torque.

[0045] When the test device is powered off or fails, the first coil 151 will be de-energized, the magnetic field of the first coil 151 disappears, the abutting spring drives the driving disc 141 to move away from the driven disc 16, thereby cutting off the power of the driven disc 16, so as to ensure that the permanent magnet motor 2 will not be damaged.

[0046] During the rotation of the output shaft of the permanent magnet motor 2, the control system continuously energizes and de-energizes the second coil 234, and energizes the electromagnetic plate 232 to generate a magnetic field, the magnetic field generated by the energized second coil 234 repels the magnetic field of the electromagnetic plate 232, under the repulsion force, the electromagnetic plate 232 moves upward, the electromagnetic plate 232 drives the vibration cylinder 211 to move upward, the electromagnetic plate 232 simultaneously stretches the first spring, the vibration cylinder 211 drives the fixed plate 21 to move upward, the fixed plate 21 drives the permanent magnet motor 2 to move upward, then the control system de-energizes the second coil 234, the magnetic field of the second coil 234 disappears, the first spring is released, the first spring drives the electromagnetic plate 232 to move downward, the electromagnetic plate 232 drives the permanent magnet motor 2 to move downward through the vibration cylinder 211 and the fixed plate 21, and as the second coil 234 is continuously energized and de-energized, the permanent magnet motor 2 continuously vibrates to realize the vibration test of the permanent magnet motor 2.

[0047] The control system can adjust the vibration frequency by adjusting the period of energizing and de-energizing the second coil 234, when the period of energizing and de-energizing is shorter, the vibration frequency of the permanent magnet motor 2 is faster, so as to face different test requirements of the permanent magnet motor 2, and reflect the reliability of the permanent magnet motor 2 through the vibration test.

[0048] When the second coil 234 is powered, the control system will reset the spring 235 power off, and the electromagnetic valve in the heating pipe 31 and the electromagnetic valve in the refrigeration pipe 32 are opened and closed, the reset spring 235 is powered off, and gradually lengthens under the action of its own elastic force, the reset spring 235 pushes the delivery plate 233 to move upward, the delivery plate 233 is close to the magnetic field of the second coil 234, the vortex shaft 236 in the delivery plate 233 moves upward, the vortex shaft 236 is affected by the magnetocaloric effect, the magnetic moment in the vortex shaft 236 forms an orderly arrangement, resulting in a decrease in magnetic entropy and an increase in temperature; the air supply system pressurizes the external air and delivers it to the air inlet 237, the air enters the vortex flow channel through the air inlet 237 and the pipeline, the air continuously contacts the vortex shaft 236, the vortex shaft 236 preheats the air, and the preheated air is delivered to the air outlet 238 through the outlet of the vortex flow channel and the pipeline, and the preheated air enters the heating pipe 31 through the air outlet 238;

[0049] When the flowmeter in the heating pipe 31 detects that the preheated air enters, the control system powers on the two different material semiconductor wires in the heating pipe 31, and the Peltier heating end in the heating pipe 31 reheats the preheated air, so that the air is heated to a set temperature, and the heated air conducts heat to the permanent magnet motor 2 through the sleeve 301 when flowing in the heating pipe 31, so that the permanent magnet motor 2 is in a high temperature state, and the air is discharged to the external atmosphere through the heating pipe 31.

[0050] When the second coil 234 is powered, the control system will reset the spring 235 power off, and the electromagnetic valve in the heating pipe 31 and the electromagnetic valve in the refrigeration pipe 32 are opened and closed, the reset spring 235 is powered off, and gradually lengthens under the action of its own elastic force, the reset spring 235 pushes the delivery plate 233 to move upward, the delivery plate 233 is close to the magnetic field of the second coil 234, the vortex shaft 236 in the delivery plate 233 moves upward, the vortex shaft 236 is affected by the magnetocaloric effect, the magnetic moment in the vortex shaft 236 forms an orderly arrangement, resulting in a decrease in magnetic entropy and an increase in temperature; the air supply system pressurizes the external air and delivers it to the air inlet 237, the air enters the vortex flow channel through the air inlet 237 and the pipeline, the air continuously contacts the vortex shaft 236, the vortex shaft 236 preheats the air, and the preheated air is delivered to the air outlet 238 through the outlet of the vortex flow channel and the pipeline, and the preheated air enters the heating pipe 31 through the air outlet 238;

[0051] When the flowmeter in the heating pipe 31 detects that the preheated air enters, the control system powers on the two different material semiconductor wires in the heating pipe 31, and the Peltier heating end in the heating pipe 31 reheats the preheated air, so that the air is heated to a set temperature, and the heated air conducts heat to the permanent magnet motor 2 through the sleeve 301 when flowing in the heating pipe 31, so that the permanent magnet motor 2 is in a high temperature state, and the air is discharged to the external atmosphere through the heating pipe 31.

[0052] With the second coil 234 continuing to be energized and de-energized, the air supply system delivers air into the heating pipe 31 and the refrigeration pipe 32, respectively, so that the heating pipe 31 and the refrigeration pipe 32 alternately heat and cool the permanent magnet motor 2, so that the permanent magnet motor 2 is in a state of continuously alternating high temperature and low temperature, and at the same time, the vibration, tests the reliability of the permanent magnet motor 2 working at different temperatures.

[0053] When the test of the permanent magnet motor 2 is completed, the control system drives the sliding plate 23 to move reversely through the horizontal electric cylinder 4, the sliding plate 23 drives the fixed plate 21 to move reversely through the fixed cylinder 231 and the vibration cylinder 211, the fixed plate 21 drives the output shaft of the permanent magnet motor 2 to move away from the through hole on the heat preservation cover 3, at this time, the clamping spring pushes the multiple sets of clamping plates 161 back to the original position, the worker removes the heat preservation cover 3, and takes down the permanent magnet motor 2 on the fixed plate 21.

[0054] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the foregoing description, and it is intended that all changes and modifications which come within the meaning and range of equivalency of the claims are resolvable thereunder. Any reference signs in the claims should not be construed as limiting the claims.

Claims

1. A new energy vehicle thermal management water pump permanent magnet motor reliability test device, characterized in that: Including test bench (11), test motor (12) is arranged on the test bench (11), the output shaft of test motor (12) is connected with speed reducer (13), the output shaft of speed reducer (13) is connected with transmission shaft (14) through shaft coupling, transmission shaft (14) is connected with connecting cylinder (15), the output shaft of permanent magnet motor (2) is connected with connecting cylinder (15), the outside of permanent magnet motor (2) is installed with heat preservation cover (3), sleeve (301) is sleeved in heat preservation cover (3), the lower side of permanent magnet motor (2) is provided with fixed plate (21), vibration spring (22) is installed below fixed plate (21), sliding plate (23) is installed below vibration spring (22), horizontal module is installed below sliding plate (23), the upper side of sliding plate (23) is provided with fixed cylinder (231), the upper side and the lower side in fixed cylinder (231) are slidably installed with electromagnetic plate (232) and conveying plate (233) respectively, the middle part of fixed cylinder (231) is provided with partition, the second coil (234) is embedded in the partition, the both ends of second coil (234) are electrically connected with control system, the inside of the upper side of conveying plate (233) is provided with vortex flow channel, vortex shaft (236) is arranged in vortex flow channel, vortex shaft (236) is magnetic material, the temperature control chamber is formed between heat preservation cover (3) and sleeve (301), heating pipe (31) and refrigeration pipe (32) are sequentially arranged in temperature control chamber, heating pipe (31) and refrigeration pipe (32) are provided with temperature compensation wire (33). 2.The reliability test device for a permanent magnet motor of a water pump for thermal management of a new energy vehicle according to claim 1, characterized in that: Reset spring (235) is connected between conveying plate (233) and test bench (11), the both ends of reset spring (235) are electrically connected with control system; The middle part of conveying plate (233) is provided with magnetic shielding plate, vortex shaft (236) is located in the magnetic field of second coil (234), air inlet (237) and air outlet (238) are provided on fixed cylinder (231), air inlet (237) and air outlet (238) are connected with the inlet and outlet of vortex flow channel through hose respectively, one-way valve is arranged in air inlet (237) and air outlet (238). 3.The reliability test device for a permanent magnet motor of a water pump for thermal management of a new energy vehicle according to claim 2, characterized in that: Vibration cylinder (211) is arranged on the lower side of fixed plate (21), vibration cylinder (211) is installed on electromagnetic plate (232), electromagnetic plate (232) is electrically connected with control system, first spring is connected between electromagnetic plate (232) and partition.

4. The reliability test device for a permanent magnet motor for a water pump for thermal management of a new energy vehicle according to claim 3, characterized in that: Air supply system is connected with air inlet (237) through pipeline, air supply system is installed on test bench (11), air outlet (238) is communicated with the inlet of heating pipe (31) and the inlet of refrigeration pipe (32) through pipeline and passes through heat preservation cover (3) respectively, heating pipe (31) and refrigeration pipe (32) are both distributed in spiral form; Electromagnetic valve and flowmeter are installed in the inlet of heating pipe (31) and refrigeration pipe (32) respectively, the outlet of heating pipe (31) and refrigeration pipe (32) is communicated with external air through pipeline and passes through heat preservation cover (3). 5.The reliability test device for a permanent magnet motor of a water pump for thermal management of a new energy vehicle according to claim 4, characterized in that: The temperature compensation wire (33) is composed of a metal wire and two semiconductor wires of different materials, one end of the two semiconductor wires of different materials is connected with the metal wire, and the two semiconductor wires of different materials are electrically connected with the control system through wires, the temperature compensation wire (33) in the heating pipe (31) is a heating end of Peltier effect, and the temperature compensation wire (33) in the refrigeration pipe (32) is a refrigeration end of Peltier effect. Temperature sensors are installed on the heating pipe (31), the refrigeration pipe (32) and the sleeve (301), and the temperature sensors are electrically connected with the control system. 6.The reliability test device for a permanent magnet motor of a water pump for thermal management of a new energy vehicle according to claim 5, characterized in that: The speed reducer (13) and the connecting cylinder (15) are installed on the test bench (11), the driving disc (141) is slidably installed on the transmission shaft (14) through a spline, the driving disc (141) is located in the connecting cylinder (15), the abutting spring is connected between the driving disc (141) and the transmission shaft (14), the driven disc (16) is installed on one side of the driving disc (141), the driven disc (16) is rotatably installed on the connecting cylinder (15), a plurality of clamping plates (161) are slidably installed on the middle part of the driven disc (16), and the clamping spring is connected between the clamping plate (161) and the driven disc (16). The opposite sides of the driving disc (141) and the driven disc (16) are respectively provided with ratchet teeth, the driving disc (141) is provided with a magnetic material, the first coil (151) is embedded in the connecting cylinder (15) outside the magnetic material, and the two ends of the first coil (151) are electrically connected with the control system. 7.The reliability test device of a permanent magnet motor for a water pump for thermal management of a new energy vehicle according to claim 6, characterized in that: The heat preservation cover (3) is arranged on the fixed plate (21) through buckles, a plurality of vibration springs (22) are arranged, the fixed plate (21) and the sliding plate (23) are connected by the plurality of vibration springs (22), and the plurality of vibration springs (22) are located outside the fixed cylinder (231). The heat preservation cover (3) is provided with a through hole, and the output shaft of the permanent magnet motor (2) penetrates through the through hole. 8.The reliability test device of a permanent magnet motor for a water pump for thermal management of a new energy vehicle according to claim 7, characterized in that: The transverse module comprises a transverse electric cylinder (4), the transverse electric cylinder (4) is installed on the test bench (11), the telescopic rod of the transverse electric cylinder (4) is connected with the sliding plate (23), the sliding plate (23) is slidably connected with the test bench (11) through a sliding block and a guide rail, and the sliding block and the guide rail are arranged on the sliding plate (23) and the test bench (11) respectively. 9.The reliability test device of a permanent magnet motor for a water pump for thermal management of a new energy vehicle according to claim 8, characterized in that: The plurality of clamping plates (161) are provided with inclined edges on the left and right sides, and the front sides of the plurality of clamping plates (161) are made of rubber. 10.The reliability test device of a permanent magnet motor for a water pump for thermal management of a new energy vehicle according to claim 9, characterized in that: The control box (1) is arranged on the test bench (11), and the control system is arranged in the control box (1).

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