Calibration test method of oil-water composite cooling motor

Abstract

The invention relates to a calibration test method of an oil-water composite cooling motor, which comprises a motor, the motor is provided with a casing, a motor shaft, a rotor core, a stator winding, a low-voltage cover plate, a rear end cover, an oil pump and an oil cooler, and the casing is provided with an oil duct, an oil nozzle and a water nozzle. The oil cooler and the oil pump are assembled with the shell; the testing device further comprises a testing part, the testing part is arranged on the motor, loading testing is conducted on the preset motor through the testing part, and the temperature, the pressure and the flow speed of the motor are tested. The temperature, the pressure and the flow velocity of cooling oil and cooling water on the motor are respectively detected through the testing component, the temperature, the pressure and the flow velocity of cooling oil and cooling water on a rotor oil way, a stator oil way and a water way on the motor are respectively detected, and the detected results are compared with original preset data of the motor. And if the detected data is consistent with the original preset data, the motor is qualified.

Description

Technical Field

[0001] The invention relates to the field of vehicle accessories, in particular to a calibration test method for an oil-water composite cooling motor. Background Art

[0002] The motor will generate a lot of heat during the continuous working process. If the temperature of the motor is too high, it will affect the reliability and performance of the motor. At present, the cooling methods of drive motors are mainly divided into two methods: water cooling and oil cooling. The water-cooled motor cools the stator core through the cooling shell, and the heat of the stator winding is transferred to the shell through the air for cooling. The heat dissipation path is long and the cooling effect is poor. Most oil-cooled motors only cool the stator winding, and the rotor shaft and bearings cannot be oil-cooled. In addition, the existing motors cannot measure various parameters on the motor, and thus cannot know the qualification of the preset motor parameters. Summary of the invention

[0003] The technical problem to be solved by the present invention is: a calibration test method for an oil-water composite cooling motor.

[0004] The technical solution to the above technical problems is: a calibration test method for an oil-water composite cooling motor, including a motor, a motor having a housing, a motor shaft, a rotor core, a stator winding, a low-pressure cover plate, a rear end cover 18, an oil pump and an oil cooler, an oil channel, an oil nozzle and a water nozzle on the housing, and the oil cooler and the oil pump are assembled with the housing. It also includes a test component, which is arranged on the motor, and the preset motor is loaded and tested by the test component, and the temperature, pressure and flow rate of the motor are tested; the temperature, pressure and flow rate of the cooling oil and cooling water on the motor are respectively detected by the test component, and the temperature, pressure and flow rate of the cooling oil and cooling water on the rotor oil circuit, stator oil circuit and water circuit on the motor are respectively detected, and the detected results are compared with the original preset data of the motor. If the detected data is consistent with the original preset data, the motor is qualified.

[0005] A further technical solution of the present invention is: the operating state of the preset motor loading test includes: rated torque test, low speed test and peak test, and the preset electronic state at rated torque, low speed and peak speed is tested by the test component respectively, and the monitoring results are recorded.

[0006] The test components include an oil pipe, a water pipe, an oil flow meter, a water flow meter, an oil temperature and pressure sensor, a water temperature and pressure sensor, and a water pump; the oil pipe includes a first oil pipe and a second oil pipe, the oil flow meter includes a first oil flow meter and a second oil flow meter, and the oil temperature and pressure sensor includes a first oil temperature and pressure sensor and a second oil temperature and pressure sensor; the water pipe includes a first water pipe and a second water pipe, the water flow meter includes a first water flow meter and a second water flow meter, and the water temperature and pressure sensor includes a first water temperature and pressure sensor and a second water temperature and pressure sensor; The two ends of the first oil pipe are respectively connected to the oil outlet of the rear end cover and the casing, the first oil flow meter and the first oil temperature and pressure sensor are respectively arranged on the first oil pipe, the first oil pipe and the oil passage of the casing are connected in parallel, and an oil passage blocking point is opened on the oil passage of the casing; The two ends of the second oil pipe are respectively connected to the oil outlet of the oil cooler and the low-pressure cover plate, and the second oil pipe is provided with a second oil flow meter and a second oil temperature and pressure sensor; The two ends of the first water pipe are respectively connected to the water inlet of the oil cooler and the water outlet of the water pump, and the first water pipe is provided with a first water flow meter and a first water temperature and pressure sensor; Two ends of the second water pipe are respectively connected to the inlet of the water pump and the water nozzle on the casing. The second water pipe is provided with a second water flow meter and a second water temperature and pressure sensor.

[0007] The oil passage between the two ends of the first oil pipe is provided with a bolt hole, and the bolt hole is provided with a bolt, and the oil passage is sealed by rotating and tightening the bolt. The motor is provided with an acrylic observation plate, which is arranged on the rear end cover. Two through holes are opened at the position of the rear end cover and the acrylic observation plate. A U-shaped tube hole is formed between the through hole and the acrylic observation plate. Through the U-shaped tube principle and through observation of the acrylic observation plate, the height position of the cooling oil inside the motor can be obtained.

[0008] A calibration test method for an oil-water composite cooling motor, the specific test method comprising the following steps: Step A. Arrange a temperature sensor at the end of the stator winding, and feed back the motor stator temperature information and record it as the first temperature information; Step B. Both ends of the second oil pipe are connected to the oil outlet of the oil cooler and the oil nozzle on the low-pressure cover plate respectively, and a second oil temperature and pressure sensor and a second oil flow meter are arranged on the second oil pipe to test the parameters of the total oil volume of the motor; Feedback the temperature of the motor oil inlet and record it as the second temperature information; Feedback the pressure of the motor oil inlet and record it as the first pressure information; Feedback the flow rate of the motor oil inlet, and record it as the first flow rate information; Step C. Add a first oil pipe at the oil passage of the motor housing. The first oil pipe and the oil passage are in parallel. When measuring, the oil passage between the rear end cover of the motor and the housing is blocked. The first oil temperature and pressure sensor and the first oil flow meter are arranged on the first oil pipe to test the stator oil quantity parameters. Feedback the temperature of the motor stator oil level, and record it as the third temperature information; Feedback the pressure of the motor stator oil amount, and record it as the second pressure information; Feedback the flow rate of the motor stator oil amount, and record it as the second flow rate information; Step D: A third oil temperature and pressure sensor is arranged at the position of the casing oil tank to record the temperature and pressure parameters of the cooling oil of the stator oil and the rotor oil before the cooling oil enters the oil pump. Feedback the temperature of the motor cooling oil and record it as the fourth temperature information; Feedback the motor cooling oil pressure and record it as the third pressure information; Step E. A first water temperature and pressure sensor and a first water flow meter are set in the motor cooling water channel from the oil cooler outlet to the water pump, and a second water temperature and pressure sensor and a second water flow meter are set in the motor cooling water channel from the water pump to the water inlet of the water nozzle, that is, the parameters of the cooling water in the water channel are tested; Feedback the outlet temperature of the motor cooling water channel and record it as the fifth temperature information; Feedback the outlet pressure of the motor cooling water channel and record it as the fourth pressure information; Feedback the outlet flow rate of the motor cooling water channel and record it as the third flow rate information; Feedback the inlet temperature of the motor cooling water channel and record it as the sixth temperature information; Feedback the inlet pressure of the motor cooling water channel and record it as the fourth pressure information; The inlet flow rate of the motor cooling water channel is fed back and recorded as the fourth flow rate information.

[0009] Due to the adoption of the above technical solution, the calibration test method of an oil-water composite cooling motor of the present invention has the following beneficial effects: 1. Through the present invention, the temperature, pressure and flow rate of the cooling oil and cooling water on the motor can be monitored and tested respectively. The preset electronic state at rated torque, low speed and peak speed can also be tested respectively, and the measured data is compared with the preset data of the motor. When the measured data is within the preset data range, the motor is qualified. When the measured data is not within the preset data range, the motor is unqualified. The problem that the existing motor cannot measure various parameters on the motor is solved, and the qualified status of the preset motor parameters can be obtained.

[0010] 2. The present invention can not only cool the motor stator windings, but also oil cool the rotor shaft and bearings through the cooling oil circuit and the cooling water circuit, thus solving the existing problem of being unable to cool and making up for the shortcomings.

[0011] Next, the technical features of a calibration test method for an oil-water composite cooling motor of the present invention will be further described in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : Auxiliary schematic diagram of the stator oil circuit of the motor; Figure 2 : Schematic diagram of total flow auxiliary in the motor front view state; Figure 3 : Motor stator oil circuit diagram, the arrow in the figure indicates the route of cooling oil; Figure 4 : Motor rotor oil circuit diagram, the arrows in the figure indicate the route of cooling oil; Figure 5 : Motor water route diagram, the arrows in the figure are the routes of cooling water; Figure 6 : Layout diagram of motor oil quantity observation position; Figure 7 : Figure 6 Schematic diagram of CC; Figure 8 : Motor schematic diagram; Fig. 9 : Figure 8 Schematic diagram of the motor AA position cross-section state; Fig.10 : Motor schematic diagram; Fig.11 : Fig.10 Motor BB position section view In the above drawings, the descriptions of the reference numerals are as follows: 1- low-pressure cover, 2- oil nozzle, 3- rear end cover, 4- motor shaft, 5- water jacket, 6- plugging position, 7- first oil flow meter, 8- first oil pipe, 9- first oil temperature and pressure sensor, 10- stator winding, 11- rotor core, 12- housing, 13- third oil temperature and pressure sensor, 14- oil pan tooling cover, 15- first water pipe, 16- water pump, 17- second water pipe, 18- first water temperature and pressure sensor, 19- second water temperature and pressure sensor, 20- first water flow meter, 21- second water flow meter, 22- nozzle, 23- second oil temperature and pressure sensor, 24- second oil flow meter, 25- first acrylic observation board, 26- second oil pipe, 27- oil cooler, 28- oil pump, 29- rear oil spray ring, 30- second acrylic observation board, 31- observation and judgment line, 32- front oil spray ring. DETAILED DESCRIPTION

[0013] A calibration test method for an oil-water composite cooling motor includes a motor and a test component. The motor is provided with a housing 12, a motor shaft 4, a rotor core 11, a stator winding 10, a low-pressure cover plate 1, a rear end cover 3, an oil pump 28 and an oil cooler 27. The housing is provided with an oil passage, an oil nozzle and a water nozzle. The original motor structure is that with the motor shaft 4 as the center, the rotor core 11, the stator winding 10, the water jacket 5, the housing 12, and the water nozzle 17 are assembled radially in sequence; with the motor shaft 4 as the center, the oil nozzle 2, the low-pressure cover plate 1, and the rear end cover 3 are assembled axially in sequence. The oil cooler 27 and the oil pump 28 are assembled with the housing 12. The function of the oil cooler is to gather the oil circuit and the water circuit in the oil cooler for heat exchange; the function of the oil pump is to accelerate the cooling oil inside the motor and control the oil flow rate.

[0014] The test component is set on the motor, and the preset motor is loaded and tested by the test component, and the temperature, pressure and flow rate of the motor are tested; the temperature, pressure and flow rate of the cooling oil and cooling water on the motor are detected by the test component, and the temperature, pressure and flow rate of the cooling oil and cooling water on the rotor oil circuit, stator oil circuit and water circuit on the motor are detected, and the detected results are compared with the original preset data of the motor. If the detected data is consistent with the original preset data, the motor is qualified. The operating state of the preset motor loading test includes: rated torque test, low speed test and peak test. The preset electronic state at rated torque, low speed and peak speed is tested by the test component, and the monitoring results are recorded.

[0015] The test components include an oil pipe, a water pipe, an oil flow meter, a water flow meter, an oil temperature and pressure sensor, a water temperature and pressure sensor, and a water pump. The oil pipe includes a first oil pipe and a second oil pipe, the oil flow meter includes a first oil flow meter 7 and a second oil flow meter 24, and the oil temperature and pressure sensor includes a first oil temperature and pressure sensor 9 and a second oil temperature and pressure sensor 23; the water pipe includes a first water pipe 15 and a second water pipe 17, the water flow meter includes a first water flow meter 20 and a second water flow meter 21, and the water temperature and pressure sensor includes a first water temperature and pressure sensor 18 and a second water temperature and pressure sensor 19.

[0016] The two ends of the first oil pipe 8 are connected to the oil outlet of the rear end cover 3 and the casing 12 respectively. The first oil flow meter 7 and the first oil temperature and pressure sensor 9 are respectively arranged in series on the first oil pipe 8. The first oil pipe 8 is connected in parallel with the oil passage of the casing. The oil passage of the casing is provided with an oil passage blocking point; the purpose is to detect the flow, temperature and pressure of the motor stator oil passage. That is, the flow, temperature and pressure of the cooling oil on the stator oil passage (see Figure 3Route state). That is, the two ends of the first oil pipe 8 are respectively connected to the two ends of the oil channel on the casing and form a parallel state. A bolt hole is opened on the oil channel between the two ends of the first oil pipe 8, and a bolt is arranged on the bolt hole. The oil channel is blocked by rotating and tightening the bolt. When the bolt is tightened in the bolt hole, the bolt can block the position. At this time, the cooling oil cannot pass through the oil channel. The cooling oil passes through the first oil pipe. By measuring the parameters of the cooling oil on the first oil pipe, the parameters of the cooling oil on the oil channel can be obtained. The parameters of the cooling oil on the first oil pipe are equal to the parameters of the cooling oil on the oil channel. The first water pipe obtains the three parameters of the motor outlet temperature, pressure, and flow rate, and the second water pipe obtains the three parameters of the motor inlet temperature, pressure, and flow rate.

[0017] The two ends of the second oil pipe 26 are connected to the oil outlet of the oil cooler 27 and the low-pressure cover plate 1, respectively. The second oil pipe 26 is provided with a second oil flow meter 24 and a second oil temperature and pressure sensor 23; the purpose is to monitor the flow, temperature and pressure of the motor oil inlet, that is, to measure the flow, temperature and pressure of the total cooling oil. The parameters of the cooling oil on the rotor oil line are obtained by subtracting the parameters of the cooling oil on the stator oil line obtained by the first oil pipe from the parameters of the total cooling oil obtained on the second oil pipe. The two ends of the second oil pipe 26 are connected to the oil outlet of the oil cooler 27 and the oil nozzle on the low-pressure cover plate 1, respectively.

[0018] The first water pipe 15 is connected to the water inlet of the oil cooler 27 and the water outlet of the water pump 16 at both ends, and the first water pipe 15 is provided with a first water flow meter 20 and a first water temperature and pressure sensor 18; the parameters of the cooling water of the first water route are obtained (see Figure 5 route status).

[0019] The two ends of the second water pipe 17 are connected to the inlet of the water pump and the water nozzle on the casing respectively. The second water pipe 17 is provided with a second water flow meter 21 and a second water temperature and pressure sensor 19. The purpose is to monitor the water flow, temperature and pressure.

[0020] The parameters include temperature, pressure and flow rate data of the cooling oil and cooling water on the motor.

[0021] The rotor oil circuit includes (see Figure 4 Route status): oil cooler 27, second oil pipe 26, low-pressure cover plate 1, oil inlet nozzle 2, motor shaft 4, oil tank and oil pump 28.

[0022] The stator oil circuit includes (such as Figure 3 Route status): oil cooler 27, first oil pipe 8, low pressure cover plate 1, rear end cover 3, casing 12, oil ring 28, oil ring 29 and oil pump 28.

[0023] The first water route includes (such as Figure 5Route status): oil cooler 27, first water pipe 15, water pump 16, second water pipe 17, water nozzle 22 and water jacket 5.

[0024] The motor is provided with an acrylic observation plate, which is arranged on the rear end cover 3. Two through holes are opened at the position of the rear end cover 3 and the acrylic observation plate, and a U-shaped tube hole is formed between the through hole and the acrylic observation plate. The height position of the cooling oil inside the motor is obtained through the U-shaped tube principle and observation of the acrylic observation plate. The acrylic observation plate 25 and the acrylic observation plate 30 are laminated and pasted and assembled with the rear end cover 3. Two holes with a spacing of 35mm and a diameter of 6mm are dug at the position of the rear end cover 3 and the acrylic observation plate 25 and the acrylic observation plate 30. The height position of the cooling oil inside the motor is obtained through the U-shaped tube principle. An observation line is provided on the acrylic observation plate, and the oil-liquid interface is compared with the observation line 31 to determine whether the oil level is in place. The oil level emerging from the acrylic observation plate is used to determine whether the cooling oil of the motor is under rated working conditions, and the height of the cooling oil level is used to determine whether the motor is full of oil.

[0025] A calibration test method for an oil-water composite cooling motor, the specific test method comprising the following steps: Step A. a temperature sensor is arranged at the end of a stator winding, and feedback motor stator temperature information is recorded as first temperature information; Step B. The two ends of the second oil pipe 26 are respectively connected to the oil outlet of the oil cooler 27 and the oil nozzle on the low-pressure cover plate 1. The second oil pipe 26 is provided with a second oil temperature and pressure sensor 23 and a second oil flow meter 24 to test the parameters of the total oil volume of the motor; the temperature of the motor oil inlet is fed back and recorded as the second temperature information; the pressure of the motor oil inlet is fed back and recorded as the first pressure information; the flow rate of the motor oil inlet is fed back and recorded as the first flow rate information; Step C. Add a first oil pipe 8 at the oil passage of the motor housing. The first oil pipe 8 is connected in parallel with the oil passage. When measuring, the oil passage between the rear end cover of the motor and the housing is blocked. The first oil temperature and pressure sensor 9 and the first oil flow meter 7 are provided on the first oil pipe 8 to test the stator oil quantity parameters. Feedback the temperature of the motor stator oil level, and record it as the third temperature information; Feedback the pressure of the motor stator oil amount, and record it as the second pressure information; The flow rate of the motor stator oil is fed back and recorded as the second flow rate information.

[0026] Step D: The third oil temperature and pressure sensor 13 is arranged at the position of the casing oil tank to record the temperature and pressure parameters of the cooling oil of the stator oil and the rotor oil before the cooling oil enters the oil pump. Feedback the temperature of the motor cooling oil and record it as the fourth temperature information; The pressure of the motor cooling oil is fed back and recorded as the third pressure information.

[0027] Step E. The motor cooling water channel is provided with a first water temperature and pressure sensor 18 and a first water flow meter 20 from the water outlet of the oil cooler 27 to the water pump 16, and a second water temperature and pressure sensor 19 and a second water flow meter 21 from the water pump 16 to the water inlet of the water nozzle 22, that is, the parameters of the cooling water on the water channel are tested. Feedback the outlet temperature of the motor cooling water channel and record it as the fifth temperature information; Feedback the outlet pressure of the motor cooling water channel and record it as the fourth pressure information; Feedback the outlet flow rate of the motor cooling water channel and record it as the third flow rate information; Feedback the inlet temperature of the motor cooling water channel and record it as the sixth temperature information; Feedback the inlet pressure of the motor cooling water channel and record it as the fourth pressure information; The inlet flow rate of the motor cooling water channel is fed back and recorded as the fourth flow rate information.

[0028] Step F. An oil level observation hole is set on the rear end cover 3 of the motor. By arranging the first acrylic observation plate 25 and the second acrylic observation plate 30 and opening two through holes at the position of the rear end cover 3 and the acrylic observation plate, a U-shaped tube hole is obtained. A cooling oil observation line 31 is set on the acrylic observation plate according to the lowest point of the motor electrical clearance, and the liquid level of the motor cooling oil is fed back and recorded as the first oil quantity information.

[0029] Step B measures the total flow parameters, which correspond to Figure 2 ,Depend on Figure 2 Flow meter and temperature and pressure sensor, total oil flow (L / min) = stator flow + rotor flow.

[0030] Step C measures the stator oil quantity parameter, which corresponds to Figure 1 ,Depend on Figure 1 The sensor obtains parameters, and the route corresponds to Figure 3 Stator oil circuit parameters (i.e. stator flow).

[0031] Figure 4 is the parameter of the rotor oil quantity, given by Figure 2 Subtract the measured Figure 3 Measured, rotor flow = total flow - stator flow.

[0032] Step D measures the temperature and pressure parameters similar to the oil outlet, step B measures the parameters before the total flow is split, and step D measures the flow after the stator oil and rotor oil are combined.

[0033] Various parameters are measured under rated torque, low speed test and peak test conditions of the motor: Through step F, the liquid level of the acrylic plate is recorded. When the liquid level is level with the lowest point of the electrical gap, the amount of motor cooling oil is counted as L. The temperature of the cooling oil entering and leaving the motor is monitored and recorded as Q1 and Q2. Through step B, the second temperature information of the oil inlet of the oil circuit is obtained and recorded as Q1; through step D, the fourth temperature information of the oil tank port is obtained and recorded as Q2; the temperature rise of the inlet and outlet of the motor oil channel is ΔT1=Q2-Q1, and the heat dissipation of the oil circuit (q1) = oil volume (L)*oil density (ρ)*ΔT1; Through step E, the monitoring and recording of the cooling water temperatures entering and leaving the motor are recorded as Q3 and Q4, the fifth temperature information of the water outlet is recorded as Q3, the sixth temperature information of the water inlet is recorded as Q4, the inlet and outlet temperature rise of the motor water channel is ΔT2=Q4-Q3, and the heat dissipation of water (q2)=heat transfer coefficient*heat transfer area*ΔT2.

[0034] The measured data is used to compare whether the sum of the heat dissipation of the motor's oil circuit and water circuit is equal to the heat dissipation of the motor cooling system when maintained in a preset operating state.

[0035] The difference between the first pressure information of the cooling oil inlet pressure obtained in step B and the third pressure information of the cooling oil outlet pressure obtained in step D is used to determine whether the oil resistance meets the oil resistance of the oil-water composite cooling motor under the preset operating state.

[0036] Whether the first flow rate information recorded in step B meets the flow rate of the oil-water composite cooling motor under the preset operating state is obtained, and whether the rotation speed of the oil pump meets the pre-rotation state flow rate is detected.

[0037] Whether the third flow rate information recorded in step E meets the flow rate of the oil-water composite cooling motor in the preset operating state is obtained, and whether the rotation speed of the water pump meets the pre-rotation state flow rate is detected.

[0038] The first flow rate is recorded as the total cooling oil flow rate M in step B, and the second flow rate is recorded as the stator oil flow rate N and the rotor oil flow rate MN in step C, that is, the stator flow rate: rotor flow rate = N: MN is recorded. Whether the obtained ratio meets the cooling oil distribution ratio of the oil-water composite cooling motor under the preset operating state.

[0039] Through the calibration test method of the oil-water composite cooling motor, the temperature, pressure and flow rate of the cooling oil and cooling water on the motor can be monitored and tested respectively. The preset electronic state at rated torque, low speed and peak speed can also be tested respectively, and the monitoring results can be recorded. The temperature, pressure and flow rate of the cooling oil and cooling water of the preset motor are recorded and tested at rated torque (optimal power state), the temperature, pressure and flow rate of the cooling oil and cooling water of the preset motor are tested at low speed (2000 rpm), and the temperature, pressure and flow rate of the cooling oil and cooling water of the preset motor are tested at peak speed (10000 rpm). The measured data is compared with the preset data of the motor. When the measured data is within the preset data range, the motor is qualified. When the measured data is not within the preset data range, the motor is unqualified.

[0040] This calibration test method can be used to measure the motor to be tested and calibrate the data.

Claims

1. A calibration test method for an oil-water composite cooling motor, comprising a motor, the motor being provided with a housing, a motor shaft, a rotor core, a stator winding, a low-pressure cover plate, a rear end cover, an oil pump and an oil cooler, the housing being provided with an oil passage, an oil nozzle and a water nozzle, the oil cooler and the oil pump being assembled with the housing; characterized in that: It also includes a testing component, which is arranged on the motor. The testing component is used to perform a load test on the preset motor, and to test the temperature, pressure and flow rate of the motor; the testing component is used to detect the temperature, pressure and flow rate of the cooling oil and cooling water on the motor, and the temperature, pressure and flow rate of the cooling oil and cooling water in the rotor oil circuit, stator oil circuit and water circuit on the motor, respectively, and the detected results are compared with the original preset data of the motor. If the detected data is consistent with the original preset data, the motor is qualified.

2. The calibration test method of an oil-water composite cooling motor according to claim 1, characterized in that: The operating states of the preset motor loading test include: rated torque test, low speed test and peak test. The test components are used to test the preset electronic states at rated torque, low speed and peak speed respectively, and the monitoring results are recorded.

3. The calibration test method of an oil-water composite cooling motor according to claim 1, characterized in that: The test components include oil pipes, water pipes, oil flow meter, water flow meter, oil temperature and pressure sensor, water temperature and pressure sensor and water pump; The oil pipe comprises a first oil pipe and a second oil pipe, the oil flow meter comprises a first oil flow meter (7) and a second oil flow meter (24), and the oil temperature and pressure sensor comprises a first oil temperature and pressure sensor (9) and a second oil temperature and pressure sensor (23); the water pipe comprises a first water pipe (15) and a second water pipe (17), the water flow meter comprises a first water flow meter (20) and a second water flow meter (21), and the water temperature and pressure sensor comprises a first water temperature and pressure sensor (18) and a second water temperature and pressure sensor (19).

4. The calibration test method of an oil-water composite cooling motor according to claim 3 is characterized in that: The two ends of the first oil pipe (8) are respectively connected to the oil outlet of the rear end cover (3) and the casing (12); the first oil flow meter (7) and the first oil temperature and pressure sensor (9) are respectively arranged on the first oil pipe (8); the first oil pipe (8) and the oil passage of the casing are connected in parallel; and an oil passage blocking point is provided on the oil passage of the casing; Two ends of the second oil pipe (26) are respectively connected to the oil outlet of the oil cooler (27) and the low-pressure cover plate (1), and the second oil pipe (26) is provided with a second oil flow meter (24) and a second oil temperature and pressure sensor (23); Two ends of the first water pipe (15) are respectively connected to the water inlet of the oil cooler (27) and the water outlet of the water pump (16), and the first water pipe (15) is provided with a first water flow meter (20) and a first water temperature and pressure sensor (18); The two ends of the second water pipe (17) are respectively connected to the inlet of the water pump and the water nozzle on the casing. The second water pipe (17) is provided with a second water flow meter (21) and a second water temperature and pressure sensor (19).

5. The calibration test method of an oil-water composite cooling motor according to claim 4, characterized in that: A bolt hole is provided on the oil passage between the two ends of the first oil pipe (8), and a bolt is provided on the bolt hole. The oil passage is sealed by rotating and tightening the bolt.

6. The calibration test method of an oil-water composite cooling motor according to claim 1, characterized in that: The motor is provided with an acrylic observation plate, which is arranged on the rear end cover (3). Two through holes are provided at the positions of the rear end cover (3) and the acrylic observation plate, and a U-shaped tube hole is formed between the through hole and the acrylic observation plate. The height position of the cooling oil inside the motor can be obtained through the U-shaped tube principle and observation of the acrylic observation plate.

7. The calibration test method of an oil-water composite cooling motor according to claim 1, characterized in that: The specific test method includes the following steps: Step A. a temperature sensor is arranged at the end of the stator winding, and the temperature information of the motor stator is fed back and recorded as the first temperature information; Step B. The two ends of the second oil pipe (26) are respectively connected to the oil outlet of the oil cooler (27) and the oil nozzle on the low-pressure cover plate (1), and the second oil pipe (26) is provided with a second oil temperature and pressure sensor (23) and a second oil flow meter (24) for testing the parameters of the total oil volume of the motor; Feedback the temperature of the motor oil inlet and record it as the second temperature information; Feedback the pressure of the motor oil inlet and record it as the first pressure information; Feedback the flow rate of the motor oil inlet, and record it as the first flow rate information; Step C. Adding a first oil pipe (8) at the oil passage of the motor housing, the first oil pipe (8) and the oil passage are in parallel, and the oil passage between the rear end cover of the motor and the housing is blocked during measurement. The first oil temperature and pressure sensor (9) and the first oil flow meter (7) are arranged on the first oil pipe (8) to test the stator oil quantity parameters; Feedback the temperature of the motor stator oil level, and record it as the third temperature information; Feedback the pressure of the motor stator oil amount, and record it as the second pressure information; Feedback the flow rate of the motor stator oil amount, and record it as the second flow rate information; Step D: a third oil temperature and pressure sensor (13) is arranged at the position of the casing oil tank to record the temperature and pressure parameters of the cooling oil of the stator oil and the rotor oil before the cooling oil enters the oil pump. Feedback the temperature of the motor cooling oil and record it as the fourth temperature information; Feedback the motor cooling oil pressure and record it as the third pressure information; Step E. A first water temperature and pressure sensor (18) and a first water flow meter (20) are arranged at a position from the water outlet of the oil cooler (27) to the water pump (16) in the motor cooling water channel, and a second water temperature and pressure sensor (19) and a second water flow meter (21) are arranged at a position from the water pump (16) to the water inlet of the water nozzle (22) in the motor cooling water channel, that is, the parameters of the cooling water in the water channel are tested. Feedback the outlet temperature of the motor cooling water channel and record it as the fifth temperature information; Feedback the outlet pressure of the motor cooling water channel and record it as the fourth pressure information; Feedback the outlet flow rate of the motor cooling water channel and record it as the third flow rate information; Feedback the inlet temperature of the motor cooling water channel and record it as the sixth temperature information; Feedback the inlet pressure of the motor cooling water channel and record it as the fourth pressure information; The inlet flow rate of the motor cooling water channel is fed back and recorded as the fourth flow rate information.

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