A high-speed motor torque testing device

Abstract

The utility model belongs to motor test technical field, concretely, the utility model relates to a kind of high-speed motor torque testing device;A kind of high-speed motor torque testing device, including combined support and speed measuring motor connecting ring, the combined support is provided with torque testing structure, and the combined support is provided with heat insulation structure;Form independent closed cavity by combined support and heat insulation structure, torque testing structure is located in closed cavity, speed measuring motor of transmission shaft both ends is driven transmission shaft, and speed measuring motor speed measuring motor of both ends is load for each other, torque sensor converts torque value into electric signal transmission to data acquisition system, and data acquisition system shows torque value;Meanwhile, by water cooling to bearing pedestal cooling and external constant temperature air source are transported airflow by ventilation duct, reduce the influence test of temperature to torque sensor, and torque sensor test result is more accurate.

Description

Technical Field

[0001] This utility model belongs to the field of motor testing technology. Specifically, this utility model relates to a high-speed motor torque testing device. Background Technology

[0002] With the rapid development of new energy vehicles, the requirements for core components in these vehicles are becoming increasingly stringent, especially for key power components such as motors, which urgently require innovation and development. The motor is one of the core components of new energy transmissions; therefore, research on B2B testing of high-temperature and high-humidity environments for high-speed new energy motor prototypes, as well as research on key equipment technologies, is of paramount importance.

[0003] Currently, when conducting B2B durability tests on high and low temperature and high humidity environments for prototype high-speed motors of new energy vehicles, common testing methods include: one is to place two test prototypes in two separate climate simulation chambers connected by a shaft system, requiring the simultaneous use of two climate simulation chambers, which is susceptible to temperature differences affecting test accuracy; the other is to install two test prototypes in the same climate simulation chamber, directly connecting them with a coupling fixture, where the test speed is measured by the speed encoder of the test prototype, and the torque is calculated from the voltage and current of the prototype, resulting in unstable test results.

[0004] Chinese Patent (Publication No.: 115950566A) discloses a static torque testing fixture for an electric compressor motor stator and its torque testing method. The fixture includes a central column, multiple fastening blades, a long shaft, a short shaft, and a fixing device. The central column has multiple threaded holes. During testing, the motor stator is first assembled in a horizontal position. The fastening blades are placed in the stator slots. Then, the central column is rotated to position and fix the short shaft in the rotor slot at the bottom of the compressor housing. When the fastening blades contact the edge of the stator slots, the short shaft is connected to the stator bearing, and the fixing device is connected to the central column. A suitable torque wrench is fitted onto the long shaft to perform a rotational torque test. After the test, the value is read from the torque meter. However, this static torque testing fixture and method cannot be used in high / low temperature or high humidity environments. Utility Model Content

[0005] This utility model is designed to solve the above-mentioned problems and aims to provide a high-speed motor torque testing device that can perform high-speed motor torque testing in the same climate simulation chamber and under high and low temperature and high humidity environments. To achieve the above objective, the technical solution adopted by this utility model is as follows: a high-speed motor torque testing device, including a combined bracket and a speed measuring motor connecting ring, wherein a torque testing structure is provided inside the combined bracket, a heat insulation structure is provided on the combined bracket, and a test connection structure is provided on the combined bracket.

[0006] The torque testing structure includes a drive shaft with bearing seats at both ends. The bearing seats are connected to a combined bracket. A torque sensor and a coupling are mounted on the drive shaft. The torque sensor is connected to the bearing seats and a sensor adapter flange. The coupling is connected to a coupling flange and the sensor adapter flange is connected to the coupling flange.

[0007] The combined support includes a support base plate, a support panel is provided on the support base plate, a first mounting hole is provided on the support panel to cooperate with the bearing seat, the bearing seat is located in the first mounting hole, a fixing circular plate is provided at the bottom of the bearing seat, the fixing circular plate abuts against the support panel, and the test connection structure is provided on the support panel.

[0008] The test connection structure includes a connecting ring plate, which has a first positioning hole and a second positioning hole on the bracket panel. The first and second positioning holes are positioned by a positioning pin, and the positioning pin is provided with a pin sleeve. Both the connecting ring plate and the bracket panel have bolt mounting holes, and the connecting ring plate has a first connecting hole that mates with the connecting ring of the speed measuring motor.

[0009] The heat insulation structure includes a first heat insulation plate and a second heat insulation plate. The first heat insulation plate is disposed between the connecting ring plate and the bracket panel. A leveling block is disposed between the first heat insulation plate and the bracket panel. A leveling hole is opened on the bracket panel. One end of the leveling block is embedded in the leveling hole. An avoidance hole is opened on the first heat insulation plate. A second heat insulation plate is disposed at the end of the bracket panel. A heat insulation top plate is disposed at the top of the bracket panel. A heat insulation base is disposed on the bracket bottom plate.

[0010] The heat-insulating base includes a heat-insulating lower base plate that is attached to the support base plate. Heat-insulating side plates are provided around the support base plate and are attached to the support base plate. A heat-insulating upper base plate is provided on the heat-insulating side plates.

[0011] A pad is provided between the heat-insulating top plate and the support panel, and a ventilation duct is provided on the pad. The heat-insulating top plate is provided with pipe holes that cooperate with the ventilation duct.

[0012] The support panel is provided with a reinforcing plate, and the support panel is provided with a second connecting hole for connecting with the fixed circular plate.

[0013] The bearing housing is provided with water inlet and outlet holes, and both the reinforcing plate and the second heat insulation plate are provided with water pipe interface holes. The second heat insulation plate is provided with wire through holes.

[0014] The technical advantages of this invention are as follows: An independent, enclosed cavity is formed by the combined bracket and insulation structure. The torque testing structure is located within this enclosed cavity. Speed ​​measuring motors at both ends of the drive shaft jointly drive the shaft, acting as loads on each other. The torque sensor converts the torque value into an electrical signal, which is then transmitted to the data acquisition system, which displays the torque value. Simultaneously, the coordinated action of the first insulation plate, the second insulation plate, the insulation top plate, and the insulation base forms an independent insulation cavity, isolating the torque sensor from the influence of high and low temperatures and high humidity within the chamber, ensuring the accuracy of the torque sensor's test results. Furthermore, water cooling of the bearing housing and the external constant-temperature air source delivered through ventilation ducts reduce the impact of temperature on the torque sensor test. The entire device can test motor torque under high and low temperature and high humidity conditions. The placement of two test motors within the climate simulation chamber reduces the number of climate simulation chambers required. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following:

[0016] Figure 1 This is an overall structural diagram of a high-speed motor torque testing device according to this utility model;

[0017] Figure 2 This is an exploded view of the overall structure of a high-speed motor torque testing device according to this utility model;

[0018] Figure 3 This is a schematic diagram of a combined support structure for a high-speed motor torque testing device according to this utility model;

[0019] Figure 4 This is a schematic diagram of the torque testing structure of a high-speed motor torque testing device according to this utility model.

[0020] The diagram is labeled as follows: 1. Combined bracket; 101. Bracket base plate; 102. Bracket panel; 103. First mounting hole; 104. Fixed circular plate; 11. Test connection structure; 111. Connecting ring plate; 112. First positioning hole; 113. Second positioning hole; 114. Positioning pin; 115. Bolt mounting hole; 116. First connecting hole; 117. Pin sleeve; 2. Torque test structure; 201. Drive shaft; 202. Bearing housing; 203. Torque sensor; 204. Coupling; 205. Transmission... 1. Sensor adapter flange; 206. Coupling flange; 3. Thermal insulation structure; 301. First thermal insulation plate; 302. Second thermal insulation plate; 303. Clearance hole; 304. Thermal insulation top plate; 305. Equal height pad; 306. Equal height hole; 31. Thermal insulation base; 311. Thermal insulation lower base plate; 312. Thermal insulation side plate; 313. Thermal insulation upper base plate; 4. Pad plate; 401. Ventilation duct; 5. Pipe hole; 6. Reinforcing plate; 7. Second connection hole; 701. Water inlet / outlet hole; 8. Water pipe interface hole; 9. Wiring hole. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0022] like Figures 1-4 As shown, a high-speed motor torque testing device includes a combined bracket 1 and a speed measuring motor connecting ring. A torque testing structure 2 is provided inside the combined bracket 1, a heat insulation structure 3 is provided on the combined bracket 1, and a test connection structure 11 is provided on the combined bracket 1.

[0023] The combined bracket 1 serves as the basic support and installation carrier for the entire device, ensuring its stability. The torque testing structure 2 is housed within the combined bracket 1, which protects it from damage. The torque testing structure 2 measures the torque of the tachometer motor. The entire device is placed within the environmental chamber required for high and low temperature testing. The heat insulation structure 3 forms a heat insulation cavity with the combined bracket 1, which slows down the rate of temperature change within the combined bracket 1. Utilizing the low thermal conductivity of the heat insulation structure 3, the temperature change within the entire device is reduced, improving the accuracy of the test results. The test connection structure 11 connects to the tachometer motor, fixing it in place.

[0024] The torque testing structure 2 includes a drive shaft 201, with bearing seats 202 at both ends of the drive shaft 201. The bearing seats 202 are connected to the combined bracket 1. A torque sensor 203 and a coupling 204 are installed on the drive shaft 201. The torque sensor 203 is connected to the bearing seat 202 and is connected to a sensor adapter flange 205. The coupling 204 is connected to a coupling flange 206, and the sensor adapter flange 205 and the coupling flange 206 are connected.

[0025] The drive shaft 201 passes through the bearing housing 202, and the drive shaft 201 and the bearing housing 202 are rotatably connected by a high-precision rolling bearing. The inner ring of the bearing is interference-fitted with the outer circumference of the drive shaft 201 and rotates synchronously with the drive shaft; the outer ring of the bearing is interference-fitted with the inner hole of the bearing housing 202 and is fixed in the bearing housing, so that the drive shaft 201 can rotate stably under the support of the bearing housing 202. The torque sensor 203 is mounted on the drive shaft 201. The torque sensor 203 is splined to the drive shaft 201 and fixed with bolts, ensuring that the torque output by the tachometer motor is transmitted to the torque sensor 203 through the drive shaft 201, avoiding torque loss that affects measurement accuracy. The torque sensor 203 converts the mechanical torque transmitted by the drive shaft 201 into an acquireable and analyzable electrical signal.

[0026] The coupling 204 is fixed to the drive shaft 201 by spline screws and bolts. The coupling 204 flexibly compensates for installation deviations through the elastic deformation of its own diaphragm, avoiding the transmission of additional torque caused by the deviation to the torque sensor 203. This ensures that the torque sensor 203 only measures the pure torque output by the tachometer motor and is not affected by installation errors. At the same time, the coupling 204 has high torque transmission capability and high speed resistance. It does not slip or produce significant deformation when rotating at high speed, which is suitable for the testing requirements of high-speed motors.

[0027] Because the interface dimensions of the torque sensor 203 and the coupling 204 are mismatched, a sensor adapter flange 205 and a coupling flange 206 are fitted onto the drive shaft 201. The sensor adapter flange 205 is bolted to the torque sensor 203, and the coupling flange 206 is bolted to the coupling 204. The sensor adapter flange 205 and the coupling flange 206 are also bolted together. This connection between the torque sensor 203 and the coupling 204 is achieved.

[0028] Both ends of the drive shaft 201 are equipped with tachometer motors. The two tachometer motors serve as loads for each other, which can make the test results more accurate. After the test is started, the tachometer motors are powered on and run. The output shaft of the tachometer motors provides rotational torque to the drive shaft 201. The mechanical torque output by the tachometer motors is transmitted to the internal elastic shaft of the torque sensor 203 through the drive shaft 201. The strain gauges on the surface of the elastic shaft change resistance with deformation. Then, the change in resistance generates an electrical signal, which is then transmitted to the external data acquisition system.

[0029] The combined bracket 1 includes a bracket base plate 101, a bracket panel 102 is provided on the bracket base plate 101, a first mounting hole 103 is provided on the bracket panel 102 to cooperate with the bearing seat 202, the bearing seat 202 is located in the first mounting hole 103, a fixing circular plate 104 is provided at the bottom of the bearing seat 202, the fixing circular plate 104 abuts against the bracket panel 102, and a test connection structure 11 is provided on the bracket panel 102.

[0030] The base plate 101 of the support structure supports the weight of the entire device. The support panel 102 is symmetrically arranged on the base plate 101 and is fixed to the base plate 101 with bolts. The support panel 102 provides an mounting surface for the bearing housing 202 and the test connection structure 11. The first mounting hole 103 positions the bearing housing 202, ensuring its coaxiality and thus ensuring stable transmission of the subsequent drive shaft 201. The cylindrical section in the middle of the bearing housing 202 is embedded in the first mounting hole 103 on the support panel 102, and the bottom of the bearing housing 202 is fixed with a circular plate 104 that is externally connected to the support panel 102.

[0031] The test connection structure 11 includes a connecting ring plate 111, which is provided with a first positioning hole 112. The bracket panel 102 is provided with a second positioning hole 113. The first positioning hole 112 and the second positioning hole 113 are connected by a positioning pin 114. The positioning pin 114 is provided with a pin sleeve 117. Both the connecting ring plate 111 and the bracket panel 102 are provided with bolt mounting holes 115. The connecting ring plate 111 is provided with a first connecting hole 116 that mates with the connecting ring of the speed measuring motor.

[0032] The connecting ring plate 111 first aligns with the second positioning hole 113 on the bracket panel 102 through its own first positioning hole 112, and inserts the positioning pin 114 to achieve precise positioning, ensuring that the connecting ring plate 111 is coaxial with the drive shaft 201 of the torque test structure 2 after installation. After positioning, the bolt mounting holes 115 on the connecting ring plate 111 and the bracket panel 102 are respectively opened, and bolts are inserted and tightened to achieve a rigid connection between the two. At the same time, the connecting ring plate 111 has a first connecting hole 116 that is adapted to the connecting ring of the speed measuring motor, which is used to fix the connecting ring of the speed measuring motor with bolts, and the output shaft of the speed measuring motor is connected to the drive shaft 201. The first positioning hole 112, the second positioning hole 113, and the positioning pin 114 precisely constrain the installation position of the connecting ring plate 111, preventing misalignment between the output shaft of the tachometer motor and the transmission shaft 201 due to installation misalignment, and reducing torque transmission errors. The bolt mounting hole 115 strengthens the connection between the connecting ring plate 111 and the bracket panel 102 by tightening the bolts, preventing the connection between the connecting ring plate 111 and the bracket panel 102 from loosening due to vibration during high-speed testing. The first connecting hole 116 enables the adaptation and installation of the connecting ring of the tachometer motor, ensuring the motor is firmly fixed.

[0033] The heat insulation structure 3 includes a first heat insulation plate 301 and a second heat insulation plate 302. The first heat insulation plate 301 is disposed between the connecting ring plate 111 and the bracket panel 102. A leveling block 305 is disposed between the first heat insulation plate 301 and the bracket panel 102. A leveling hole 306 is provided on the bracket panel 102, and the leveling block 305 is embedded in the leveling hole 306. Since the fixed circular plate 104 abuts against the bracket panel 102, the leveling block 305 can prevent interference between the first heat insulation plate 301 and the fixed circular plate 104. An avoidance hole 303 is provided on the first heat insulation plate 301. The second heat insulation plate 302 is provided at the end of the bracket panel 102. A heat insulation top plate 304 is provided at the top of the bracket panel 102. A heat insulation base 31 is provided on the bracket bottom plate 101. The first heat insulation plate 301 is sandwiched between the connecting ring plate 111 and the bracket panel 102. When the connecting ring plate 111 is connected to the bracket panel 102 by bolts, it passes through the first heat insulation plate 301 for fixation. The clearance hole 303 in the center of the first heat insulation plate 301 avoids the drive shaft 201. The second heat insulation plate 302 is fixed to the end of the bracket panel 102 by bolts. The heat insulation top plate 304 covers the top of the bracket panel 102 and is connected to the top of the bracket panel 102 and the second heat insulation plate 302 by bolts. The heat insulation base 31 is attached to the bracket base plate 101. The first heat insulation plate 301, the second heat insulation plate 302, the heat insulation top plate 304 and the heat insulation top plate 304 form a closed cavity. This isolates the high and low temperatures and high humidity in the environmental chamber from the corrosion of the torque test structure 2; maintains the temperature stability in the cavity, ensures that the torque sensor 203 works accurately under rated conditions, and avoids the interference of temperature and humidity on the test data.

[0034] The heat-insulating base 31 includes a heat-insulating lower base plate 311, which is attached to the support base plate 101. Heat-insulating side plates 312 are provided around the support base plate 101, which are attached to the support base plate 101. A heat-insulating upper base plate 313 is provided on the heat-insulating side plates 312.

[0035] The heat-insulating lower base plate 311 is in close contact with the lower surface of the bracket base plate 101. The heat-insulating side plates 312 around the bracket base plate 101 are attached to the sides of the bracket base plate 101, and the edges of the heat-insulating side plates 312 are aligned with the edges of the heat-insulating lower base plate 311. The top of the heat-insulating side plates 312 is attached to the edges of the heat-insulating upper base plate 313. The heat-insulating upper base plate 313 is attached to the bottom of the bracket panel 102 and the second heat-insulating plate 302. The heat-insulating upper base plate 313, heat-insulating side plates 312, heat-insulating lower base plate 311 and bracket base plate 101 are connected by bolts to form a complete bottom heat-insulating closed structure. The closed bracket base plate 101 further enhances the heat insulation effect and can prevent dust or condensation in the environmental chamber from contacting the bracket base plate 101 and the bottom components.

[0036] A pad 4 is provided between the heat-insulating top plate 304 and the support panel 102. A ventilation duct 401 is provided on the pad 4, and a pipe hole 5 is provided on the heat-insulating top plate 304 to mate with the ventilation duct 401. Bolts pass through the heat-insulating top plate 304, the pad 4 and the support panel 102 to connect and fix them, so that the pad 4 fits tightly against the upper surface of the support panel 102. There are two ventilation ducts 401 on the pad 4. The ventilation ducts 401 are located in the pipe holes 5 opened in the heat-insulating top plate 304. The diameter of the pipe hole 5 is adapted to the inner diameter of the ventilation duct 401. When the environmental chamber starts high and low temperature testing, the external constant temperature air source delivers airflow through the ventilation duct 401 to circulate ventilation throughout the heat-insulating cavity, maintain the working temperature of the torque sensor 203 within a certain range, and ensure the accuracy of the torque test data.

[0037] A reinforcing plate 6 is provided on the bracket panel 102, and a second connecting hole 7 is provided on the bracket panel 102 to connect with the fixed circular plate 104. The reinforcing plates 6 are evenly spaced on the bracket panel 102 to connect the two bracket panels 102 together, making the bracket panel 102 more stable. The second connecting holes 7 are symmetrically arranged around the circumference, and bolts are passed through the second connecting holes 7 to connect and fix them together with the fixed circular plate 104.

[0038] The bearing housing 202 is provided with water inlet and outlet holes 8. Water pipe interface holes 801 are provided on both the reinforcing plate 6 and the second heat insulation plate 302. A wire through hole 9 is provided on the second heat insulation plate 302. The bearing housing 202 has two water inlet and outlet holes 8, which serve as channels for water cooling. External cold water enters the water channel through the inlet hole of the water inlet and outlet holes 8, flows through the outer ring of the bearing to carry away heat, and then flows out through the outlet hole of the water inlet and outlet holes 8, forming a circulation. This can control the temperature of the bearing housing 202 below 60℃, preventing grease failure and bearing seizure, ensuring the smooth rotation of the drive shaft 201, and simultaneously blocking heat conduction to the torque sensor 203, ensuring accurate measurement by the torque sensor 203. The wire through hole 9 provides a channel for the signal line of the torque sensor 203 to be led out from the heat insulation cavity.

[0039] The role and effect of the embodiments

[0040] The combined bracket 1 and the heat insulation structure 3 form an independent closed cavity. The torque testing structure 2 is located inside the closed cavity. The speed measuring motors at both ends of the drive shaft 201 jointly drive the drive shaft 201, and the speed measuring motors at both ends are loads on each other. The torque sensor 203 converts the torque value into an electrical signal and transmits it to the data acquisition system, which displays the torque value. At the same time, through the coordinated action of the first heat insulation plate 301, the second heat insulation plate 302, the heat insulation top plate 304, and the heat insulation base 31, an independent heat insulation cavity is formed, isolating the high and low temperature and high humidity environment inside the chamber from the influence of the torque sensor 203 itself, ensuring the accuracy of the torque sensor 203 test results. In addition, the bearing seat 202 is cooled by water cooling, and the external constant temperature air source is delivered through the ventilation duct 401 to reduce the influence of temperature on the torque sensor 203 test. The entire device can test the torque of the motor in high and low temperature and high humidity environments. Two test motors are placed in the climate simulation chamber, reducing the number of climate simulation chambers used.

[0041] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A high speed motor torque testing device, characterized in that, It includes a combined bracket (1) and a speed measuring motor connecting ring. The combined bracket (1) is provided with a torque testing structure (2), a heat insulation structure (3) is provided on the combined bracket (1), and a test connection structure (11) is provided on the combined bracket (1).

2. The high speed motor torque testing apparatus of claim 1, wherein: The torque testing structure (2) includes a drive shaft (201), with bearing seats (202) at both ends of the drive shaft (201). The bearing seats (202) are connected to the combined bracket (1). A torque sensor (203) and a coupling (204) are provided on the drive shaft (201). The torque sensor (203) is connected to the bearing seat (202). The torque sensor (203) is connected to a sensor adapter flange (205). The coupling (204) is connected to a coupling flange (206). The sensor adapter flange (205) and the coupling flange (206) are connected.

3. The high speed motor torque testing apparatus of claim 2, wherein: The combined bracket (1) includes a bracket base plate (101), a bracket panel (102) is provided on the bracket base plate (101), a first mounting hole (103) is provided on the bracket panel (102) to cooperate with the bearing seat (202), the bearing seat (202) is located in the first mounting hole (103), a fixing circular plate (104) is provided at the bottom of the bearing seat (202), the fixing circular plate (104) abuts against the bracket panel (102), and the test connection structure (11) is provided on the bracket panel (102).

4. The high speed motor torque testing apparatus of claim 3, wherein: The test connection structure (11) includes a connecting ring plate (111), a first positioning hole (112) is provided on the connecting ring plate (111), and a second positioning hole (113) is provided on the bracket panel (102). The first positioning hole (112) and the second positioning hole (113) are positioned by a positioning pin (114). A pin sleeve (117) is provided on the positioning pin (114). Both the connecting ring plate (111) and the bracket panel (102) are provided with bolt mounting holes (115). The connecting ring plate (111) is provided with a first connecting hole (116) that cooperates with the connecting ring of the speed measuring motor.

5. The high speed motor torque testing apparatus of claim 3, wherein: The heat insulation structure (3) includes a first heat insulation plate (301) and a second heat insulation plate (302). The first heat insulation plate (301) is disposed between the connecting ring plate (111) and the bracket panel (102). A leveling block (305) is disposed between the first heat insulation plate (301) and the bracket panel (102). A leveling hole (306) is opened on the bracket panel (102). One end of the leveling block (305) is embedded in the leveling hole (306). An avoidance hole (303) is opened on the first heat insulation plate (301). A second heat insulation plate (302) is disposed at the end of the bracket panel (102). A heat insulation top plate (304) is disposed at the top of the bracket panel (102). A heat insulation base (31) is disposed on the bracket bottom plate (101).

6. The high speed motor torque testing apparatus of claim 5, wherein: The heat-insulating base (31) includes a heat-insulating lower base plate (311), which is attached to the support base plate (101). Heat-insulating side plates (312) are provided around the support base plate (101), which are attached to the support base plate (101). A heat-insulating upper base plate (313) is provided on the heat-insulating side plate (312).

7. The high speed motor torque testing apparatus of claim 5, wherein: A pad (4) is provided between the heat-insulating top plate (304) and the support panel (102). A ventilation duct (401) is provided on the pad (4). A pipe hole (5) that cooperates with the ventilation duct (401) is provided on the heat-insulating top plate (304).

8. The high speed motor torque testing apparatus of any one of claims 3 to 7, wherein: The bracket panel (102) is provided with a reinforcing plate (6), and the bracket panel (102) is provided with a second connecting hole (7) for connecting with the fixed circular plate (104).

9. The high speed motor torque testing apparatus of claim 8, wherein: The bearing housing (202) is provided with water inlet and outlet holes (8), and the reinforcing plate (6) and the second heat insulation plate (302) are both provided with water pipe interface holes (801), and the second heat insulation plate (302) is provided with wire through holes (9).

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