A motor endurance test device

Abstract

This invention discloses a motor durability testing device, belonging to the field of motor performance testing technology. The device has two relatively spaced mounting bases on a machine platform to mount the test motors, and the output shafts of the two motors are coaxially connected by a coupling assembly located in the middle. A radial loading assembly is integrated above the mounting bases, using a cylinder to drive an internal pressure-applying component to move vertically, causing the arc-shaped contact surface or transition bearing at the bottom of the pressure-applying component to press against the outside of the drive shaft of the coupling assembly, thereby applying a precise radial simulated load to the motor while it is rotating at high speed. A precision pressure reducing valve and a speed control valve are connected in series in the device's air circuit to accurately adjust the loading pressure and contact speed, preventing impact damage. Furthermore, an energy feedback assembly rectifies and feeds the electrical energy generated by the load motor back to the DC bus or power supply side, and a protective cover is used to enclose and protect the rotating area.

Description

Technical Field

[0001] This invention relates to the field of motor performance testing technology, specifically to a motor durability testing device. Background Technology

[0002] With the rapid development of new energy vehicles, precision manufacturing, and industrial automation technologies, motors, as core power and actuator components, are constantly improving in terms of power density, speed, and structural compactness. In practical applications, motors not only need to operate stably for extended periods under high speed and high load conditions, but they are also often affected by assembly errors, operating condition fluctuations, and external structural constraints, causing the motor shaft system and bearings to bear certain radial loads during operation. Therefore, testing and evaluating the reliability and durability of motors under complex stress conditions during the motor research and development and production stages has become a crucial step in ensuring the safety and stability of motors throughout their entire lifecycle.

[0003] Existing motor durability testing equipment primarily focuses on torque or speed loading, applying loads to the motor under test through brakes, eddy current loading devices, or tractor motors to simulate the motor's operating conditions. However, these testing methods mainly focus on the motor's output performance in the rotational direction, failing to adequately consider the radial forces commonly experienced by the motor's shaft system and bearings under actual operating conditions. This makes it difficult to accurately reflect the wear, vibration, and lifespan degradation caused by radial pressure during long-term operation. Therefore, there is an urgent need for testing equipment that can simultaneously simulate radial loads during motor durability testing and is suitable for long-term stable operation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a motor durability testing device that solves the problems of non-experimental wear on the motor shaft during radial loading, unstable loading force control, difficulty in aligning the transmission chain leading to sensor damage, and high energy consumption during the testing process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a motor durability testing device, comprising: a machine base; The mounting assembly includes at least two mounting bases arranged at a distance from each other, the mounting bases being used to mount a test motor; A coupling assembly is disposed between the two mounting bases, and the coupling assembly has receiving holes at both ends for the output shaft of the test motor to extend into. A radial loading assembly is disposed on the mounting base. The radial loading assembly includes a driving member and a pressure applying member. The pressure applying member is movably disposed within the mounting base, and has a pressure applying surface on its side facing the coupling assembly that is adapted to the shape of the coupling assembly. The driving member is vertically mounted on the mounting base, and its output end is connected to the pressure applying member. The driving member is used to drive the pressure applying member to move in a direction perpendicular to the axis of the coupling assembly, so that the pressure applying surface presses against the outer side of the coupling assembly, thereby applying a radial simulated load to it. The energy feedback component is electrically connected to two test motors. It is used to rectify the electrical energy generated by one of the test motors when it is being driven and feed it back to the power supply side of the other test motor, thus forming an energy recovery path.

[0006] The above technical solution involves: setting up relatively spaced mounting base assemblies on the machine tool, and mounting the test motors on each mounting base, so that the two test motors are arranged facing each other in a stable installation state; by setting a coupling assembly between the two mounting bases, and having the output shaft of the test motor extend into the receiving holes at both ends of the coupling assembly, a coaxial connection between the two test motors is achieved, ensuring the stability of power transmission and the transmission accuracy during the test. Simultaneously, by setting a radial loading assembly on the mounting base, and having a driving component drive the pressure-applying component to move in a direction perpendicular to the axis of the coupling assembly, the pressure surface presses against the outside of the coupling assembly, thereby applying a controllable radial simulated load to the coupling assembly during the test. This realistically simulates the radial stress state experienced by the motor under actual working conditions, improving the authenticity and validity of the durability test results.

[0007] In addition, by setting up an energy feedback component, the electrical energy generated by one of the test motors when it is driven by another test motor is rectified and fed back to the power supply side of the other test motor, forming an energy recovery path. This reduces energy loss during the test process, improves the overall energy utilization efficiency of the test system, and is suitable for long-term, continuous motor durability testing conditions.

[0008] Preferably, the top of the mounting base has a through hole communicating with its interior and exterior; the pressure-applying component includes a connecting part and a pressure-applying part; one end of the connecting part is fixedly connected to the pressure-applying part, and the other end extends through the through hole to the outside of the mounting base and is fixedly connected to the output end of the driving component; the pressure-applying part is located inside the mounting base, and the size of the pressure-applying part is larger than the diameter of the through hole.

[0009] The above technical solution involves providing a through hole at the top of the mounting base that connects the inside and outside of it, and constructing the pressure-applying component as a connecting part and a pressure-applying part. This allows the pressure-applying component to be stably guided and moved vertically within the mounting base. The connecting part passes through the through hole and is fixedly connected to the output end of the drive component, while the pressure-applying part is located inside the mounting base and its size is larger than the diameter of the through hole. This provides reliable support and limitation for the pressure-applying component under the action of the drive component, preventing the pressure-applying component from swaying or coming off during loading. It ensures the stability of the force and the loading accuracy when the pressure-applying component applies radial load to the coupling assembly, thereby improving the safety and reliability of the radial loading process.

[0010] Preferably, the pressure-applying surface is disposed on the pressure-applying part; the pressure-applying surface is constructed as a concave arc-shaped contact surface, and the arc-shaped contact surface is adapted to the shape of the coupling assembly.

[0011] The above technical solution increases the effective contact area between the pressure-applying component and the coupling assembly by setting the pressure-applying surface as a concave arc-shaped contact surface that matches the shape of the coupling assembly, thereby reducing the unit contact pressure and avoiding wear or damage to the surface of the coupling assembly caused by local stress concentration, thus improving the stability of the loading process and the service life of the coupling assembly.

[0012] Preferably, the radial loading assembly further includes a transition bearing coaxially sleeved outside the coupling assembly; the inner ring of the transition bearing is interference-fitted with the coupling assembly to rotate synchronously with the coupling assembly; the pressure-applying part has an arc-shaped contact surface on the side facing the transition bearing that matches the radius of the outer ring of the transition bearing, and the pressure-applying part presses against the outer wall of the outer ring of the transition bearing through the arc-shaped contact surface under the drive of the driving member to restrict the outer ring from rotating with the inner ring.

[0013] The above technical solution involves coaxially installing a transition bearing on the outside of the coupling assembly. During radial loading, the pressure-applying component no longer directly contacts the outer surface of the coupling assembly, but instead presses against the outer wall of the outer ring of the transition bearing. Because the inner ring of the transition bearing is interference-fitted with the coupling assembly, and the outer ring is restricted from rotation under the pressure of the pressure-applying component, the radial load applied by the pressure-applying component is transmitted to the coupling assembly through the transition bearing. This transforms the original sliding contact between the pressure-applying component and the coupling assembly into a rolling contact between the inner and outer rings of the transition bearing. This significantly reduces frictional heat generation, avoids surface wear on the coupling assembly and its connected drive shaft, and improves the durability and operational reliability of the equipment under radial loading conditions.

[0014] Preferably, the driving component is a cylinder, and the device further includes a pneumatic control circuit connected to the cylinder; the pneumatic control circuit is sequentially arranged along the airflow direction with an air source processing unit, a precision pressure reducing valve, and an electromagnetic reversing valve; the air source processing unit is connected to an external compressed air source and is used to perform water removal filtration, oil mist separation, and primary pressure regulation on the input compressed air; the precision pressure reducing valve is connected between the air source processing unit and the electromagnetic reversing valve and is used to regulate the pressure of the compressed air processed by the air source processing unit to set the standard pressure value of the radial simulated load output by the cylinder.

[0015] The above technical solution uses a cylinder as the driving component and sets up a pneumatic control circuit that includes an air source processing unit, a precision pressure reducing valve, and an electromagnetic reversing valve to achieve precise adjustment and stable output of the radial simulated load. This results in good controllability and repeatability of the radial loading process, meeting the loading requirements under different test conditions.

[0016] Preferably, the pneumatic control circuit further includes at least one speed control valve; the speed control valve is connected in series on the pipeline connecting the electromagnetic reversing valve and the cylinder; the speed control valve is used to adjust the flow rate of compressed air through the cylinder and control the loading speed of the pressure applying element moving towards the coupling assembly, so as to achieve smooth contact between the pressure applying element and the coupling assembly.

[0017] The above technical solution involves setting a speed control valve in the pneumatic control circuit to adjust the cylinder's operating speed, allowing the pressure-applying component to gradually contact the coupling assembly at a controlled speed. This avoids rigid impacts during loading, thereby reducing the impact on the coupling assembly, drive shaft, and torque sensor, and improving the safety of the testing process and the stability of the test data.

[0018] Preferably, the coupling assembly includes a torque sensor disposed between the two mounting bases, a drive shaft located on both sides of the torque sensor, and a coupling disposed between the drive shaft and the torque sensor; one end of the drive shaft is connected to the torque sensor through the coupling, and the other end is provided with a receiving hole for the output shaft of the test motor to extend into.

[0019] The above technical solution involves setting a torque sensor between two mounting bases and connecting the test motor to the torque sensor via a drive shaft and coupling. This enables real-time measurement of the torque transmitted during the test while ensuring the coaxiality and stability of the power transmission path, thereby improving the accuracy and reliability of the torque test data.

[0020] Preferably, the energy feedback component includes a DC bus, a first driver, and a second driver; wherein, one test motor serves as an active test motor, and the other test motor serves as a passive load motor; the first driver is electrically connected to the active test motor and is used to provide driving power to the active test motor; the second driver is electrically connected to the passive load motor and is used to rectify the output power of the passive load motor when it is driven; the DC bus is electrically connected to both the first driver and the second driver, so that the power generated by the passive load motor is rectified by the second driver and fed back to the DC bus, and then flows back to the first driver from the DC bus, thereby forming an energy recovery loop.

[0021] The above technical solution involves setting up a DC bus and connecting the two test motors to the first and second drivers respectively. This allows the electrical energy generated by the passive load motor during its operation to be rectified and fed back to the DC bus for use by the active test motor. This creates an efficient energy recovery circuit and significantly reduces energy consumption during long-term durability testing.

[0022] Preferably, the mounting base is a hollow structure, and the mounting base has a first shaft hole and a second shaft hole respectively on opposite sides along the axial direction; the drive shaft passes through the mounting base, one end of which extends out through the first shaft hole and is connected to the coupling; the output shaft of the test motor extends into the mounting base through the second shaft hole and is coaxially connected to the other end of the drive shaft; wherein, the diameter of the first shaft hole is larger than the diameter of the second shaft hole.

[0023] The above technical solution involves setting the mounting base as a hollow structure and setting shaft holes of different diameters on both sides of its axial direction, so that the output shaft of the test motor and the transmission shaft can be coaxially connected inside the mounting base. This facilitates the assembly and disassembly of the test motor, ensures the coaxiality of the transmission system, and improves the stability of the whole machine operation.

[0024] Preferably, the device further includes a protective cover disposed between the two mounting bases; the protective cover covers the coupling assembly.

[0025] The above technical solution effectively prevents safety hazards caused by exposed rotating parts during operation by installing a protective cover between the two mounting bases to cover and protect the coupling assembly, thereby improving the safety of the equipment under long-term durability testing conditions.

[0026] This invention provides a motor durability testing device. It has the following beneficial effects: 1. This invention innovatively introduces a transition bearing structure into the radial loading assembly, transforming the sliding friction between the pressure-applying component and the rotating transmission shaft into rolling friction within the bearing. This completely solves the problems of high heat and physical scratches on the shaft surface that are easily generated by traditional hard-press loading methods. Combined with the concave arc-shaped contact surface design at the bottom of the pressure-applying component, this device not only increases the contact area to reduce unit pressure but also, through precise pressure regulation and speed control functions in the pneumatic control circuit, effectively avoids damage to the motor shaft or precision sensors from the rigid impact during loading. This ensures that durability testing only causes internal fatigue failure of the motor, rather than external human-caused damage, greatly improving the authenticity of the test data and the service life of the equipment.

[0027] 2. This invention, by setting a coupling assembly between two mounting bases and integrating a torque sensor within the coupling assembly, enables real-time monitoring and acquisition of the transmitted torque of the test motor while a radial load is applied. This allows for accurate assessment of the motor's operating status under combined stress conditions. Compared to traditional testing methods that only apply speed or torque, this invention can simultaneously reflect the impact of radial load on motor output performance, bearing condition, and transmission stability, effectively improving the realism of the operating conditions in durability testing and the analytical value of the test data.

[0028] 3. This invention incorporates an energy feedback component, which rectifies the electrical energy generated by the driven test motor and feeds it back to the power supply side of another test motor, creating a closed-loop energy recovery path. This significantly reduces external power supply requirements and energy loss while continuously loading the test motor. This structure not only effectively reduces operating energy consumption and heat generation during durability testing but also facilitates long-term continuous operation of the equipment, improving the overall energy efficiency and economy of the testing system. It is particularly suitable for long-term durability testing scenarios under high-speed and high-load conditions. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of a motor durability testing device according to the present invention; Figure 2 This is a cross-sectional schematic diagram of a motor durability testing device according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a motor durability testing device according to the present invention; Figure 4 This is a pneumatic circuit diagram of an electric motor durability testing device according to the present invention; Figure 5 This is a circuit diagram of a motor durability testing device according to the present invention; Reference numerals: 10. Machine base; 20. Mounting assembly; 21. Mounting base; 211. First shaft hole; 212. Second shaft hole; 30. Coupling assembly; 31. Torque sensor; 32. Drive shaft; 321. Receiving hole; 33. Coupling; 40. Radial loading assembly; 41. Drive component; 411. Air source treatment unit; 412. Precision pressure reducing valve; 413. Solenoid directional valve; 414. Speed ​​control valve; 42. Pressure applying component; 421. Connecting part; 422. Pressure applying part; 423. Pressure applying surface; 43. Transition bearing; 431. Inner ring; 432. Outer ring; 50. Energy feedback assembly; 51. DC bus; 52. First driver; 53. Second driver; 60. Test motor; 70. Protective cover. Detailed Implementation

[0030] The technical solutions in 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.

[0031] This invention provides a motor durability testing device specifically designed to simulate the operating conditions of new energy drive motors, industrial servo motors, or other precision rotating machinery under long-term, high-load conditions, particularly for precise simulated loading tests on the radial force at the motor output shaft end. This device utilizes an innovative "transition bearing type" flexible loading technology, combined with a pneumatic precision control and energy feedback system, to solve the non-experimental wear problems caused by traditional hard friction loading, and achieves green and energy-saving testing.

[0032] Reference Figure 1 , Figure 2 As shown in the figure, the motor durability testing equipment provided in this embodiment is installed on the machine base 10. The machine base 10 serves as the basic load-bearing structure of the entire machine, used for the installation, support, and positioning of various functional components to ensure that the equipment has sufficient structural rigidity and operational stability during long-term durability testing. The motor durability testing equipment mainly includes: a mounting base assembly 20, a coupling assembly 30, a radial loading assembly 40, an energy feedback assembly 50, and a protective cover 70. The above components are reasonably arranged on the machine base 10 according to the test conditions and cooperate with each other in structure and function to realize the durability performance testing of the test motor under complex stress conditions.

[0033] The mounting base assembly 20 includes at least two mounting bases 21 arranged relatively apart. This embodiment uses two mounting bases 21 as an example, but is not limited to this. In other embodiments, three or more mounting bases can be provided according to testing requirements. Each mounting base 21 is fixedly mounted on the machine base 10 for mounting one test motor 60. The mounting base 21 is preferably an integral hollow structure with an internal mounting cavity to accommodate part of the transmission structure, thereby achieving a compact arrangement of the overall equipment structure. On two opposite sides along the axial direction of the test motor 60, the mounting base 21 is respectively provided with a first shaft hole 211 and a second shaft hole 212. The first shaft hole 211 is used for one end of the coupling assembly 30 to pass through or connect, and the second shaft hole 212 is used for the output shaft of the test motor 60 to extend into the mounting base 21.

[0034] Preferably, the diameter of the first shaft hole 211 is larger than the diameter of the second shaft hole 212. This differential diameter design has a dual function: on the one hand, the larger first shaft hole 211 provides ample space for the installation, assembly, and adjustment of the coupling assembly 30 and its connecting parts; on the other hand, it also serves as an assembly entry point for internal parts. Specifically, since the bottom dimension of the pressure-applying member 42 in the radial loading assembly 40 is designed to be larger than the diameter of the top through hole 213, during assembly, the pressure-applying member 42 needs to be inserted into the mounting base 21 through the larger diameter first shaft hole 211, and then its posture is adjusted so that its connecting part 421 passes through the through hole 213 from the inside out and connects with the external drive member 41. The second shaft hole 212 is mainly used to guide and position the output shaft of the test motor.

[0035] Reference Figure 2 , Figure 3 As shown, the coupling assembly 30 is disposed between two mounting bases 21 and between the output shafts of two adjacent test motors 60, for realizing the mechanical connection between the two test motors 60. Specifically, the coupling assembly 30 includes a torque sensor 31, drive shafts 32 respectively disposed on both sides of the torque sensor 31, and a coupling 33 disposed between the drive shafts 32 and the torque sensor 31. The torque sensor 31 is used to detect the torque transmitted between the two test motors 60 in real time, and its two ends are respectively connected to the corresponding drive shafts 32. One end of each drive shaft 32 is connected to the torque sensor 31 through the coupling 33, and the other end is provided with a receiving hole 321 for the output shaft of the test motor 60 to extend into and form a coaxial connection.

[0036] With the above structural setup, after the test motor 60 is installed, its output shaft is coaxially connected to the corresponding transmission shaft 32, so that the two test motors 60 can achieve stable torque transmission through the coupling assembly 30.

[0037] Reference Figure 2 , Figure 3 , Figure 4 As shown, a radial loading assembly 40 is mounted on at least one mounting base 21 and located radially outside the coupling assembly 30, used to apply a controllable radial simulated load to the coupling assembly 30 during testing. The radial loading assembly 40 includes a drive component 41, a pressure-applying component 42, and a transition bearing 43. The drive component 41 is preferably a cylinder, which is vertically mounted on the top of the mounting base 21 and coaxially connected to the pressure-applying component 42. The telescopic movement of the cylinder 41 drives the pressure-applying component 42 to reciprocate in a direction perpendicular to the axis of the coupling assembly 30. To achieve precise control of the radial load, in this embodiment, the cylinder 41 is equipped with a pneumatic control circuit. The pneumatic control circuit includes, in sequence along the compressed air flow direction, an air source processing unit 411, a precision pressure reducing valve 412, an electromagnetic reversing valve 413, and a speed control valve 414. The air source processing unit 411 is connected to an external compressed air source and is used to dehydrate, filter and separate oil mist from the input air, and to perform primary pressure stabilization; the precision pressure reducing valve 412 is used to finely regulate the pressure of the processed compressed air to set the output thrust of the cylinder 41; the electromagnetic reversing valve 413 is used to control the direction of movement of the cylinder 41; and the speed control valve 414 is used to adjust the gas flow rate, thereby controlling the extension and retraction speed of the cylinder 41.

[0038] Through the synergistic effect of the above-mentioned pneumatic control loops, stable, continuous, and controllable adjustment of the radial simulated load size and loading speed can be achieved.

[0039] The pressure-applying component 42 is movably disposed inside the mounting base 21 and includes a connecting portion 421 and a pressure-applying portion 422. One end of the connecting portion 421 is fixedly connected to the pressure-applying portion 422, and the other end passes through the through hole 213 and extends to the outside of the mounting base 21, where it is fixedly connected to the output end of the driving component 41. The pressure-applying portion 422 is located inside the mounting base 21 and its size is larger than the diameter of the through hole 213 to prevent the pressure-applying component 42 from dislodging from the mounting base 21 during operation. A pressure-applying surface 423 is formed on the side of the pressure-applying portion 422 facing the coupling assembly 30. The pressure-applying surface 423 is constructed as a concave arc-shaped contact surface. In this invention, the pressure-applying surface 423 is a working contact surface for contacting the coupling assembly 30 or the transition bearing 43 and applying radial load. Its specific structural form can be a concave arc-shaped contact surface. Moreover, this arc-shaped contact surface is adapted to the shape of the coupling assembly 30, thereby increasing the contact area and reducing the unit contact pressure during radial loading. In a preferred embodiment, the radial loading assembly 40 further includes a transition bearing 43 coaxially sleeved on the outside of the coupling assembly 30. The transition bearing 43 includes an inner ring 431 and an outer ring 432, wherein the inner ring 431 is interference-fitted with the coupling assembly 30, allowing the inner ring 431 to rotate synchronously with the coupling assembly 30; the outer ring 432 remains relatively stationary during radial loading. In this embodiment, the pressure applying member 42 does not directly press against the outer surface of the coupling assembly 30, but rather presses against the outer wall of the outer ring 432 of the transition bearing 43 under the action of the driving member 41, thereby applying a radial simulated load to the coupling assembly 30 through the transition bearing 43.

[0040] By setting the transition bearing 43, the direct sliding contact between the pressure-applying component 42 and the coupling assembly 30 during radial loading is transformed into rolling contact inside the transition bearing 43, thereby significantly reducing frictional resistance and frictional heat generation, avoiding abnormal wear on the surfaces of the coupling assembly 30 and the drive shaft 32, and improving the reliability of the equipment under long-term durability testing conditions.

[0041] Reference Figure 3 , Figure 4 , Figure 5 As shown, the energy feedback component 50 is electrically connected between the two test motors 60 to recover and reuse electrical energy during the durability test.

[0042] The energy feedback assembly 50 includes a DC bus 51, a first driver 52, and a second driver 53. One test motor 60 serves as the active test motor, and the other as the passive load motor. The first driver 52 is electrically connected to the active test motor 60 to provide it with driving power; the second driver 53 is electrically connected to the passive load motor to rectify its output power when the passive load motor is in a driven state. The DC bus 51 is electrically connected to both the first driver 52 and the second driver 53, so that the power generated by the passive load motor is rectified and fed back to the DC bus 51, and then flows back to the first driver 52 from the DC bus 51. In this invention, the power supply side of the test motor includes the driver electrically connected to it and its corresponding DC bus 51.

[0043] To improve equipment operating safety, this embodiment also includes a protective cover 70. The protective cover 70 is disposed between the two mounting bases 21 and covers the area where the coupling assembly 30 and the radial loading assembly 40 are located.

[0044] Reference Figure 2 As shown, the protective cover 70 can be made of metal or high-strength transparent protective material. Its structural shape is adapted to the coupling assembly 30 and the radial loading assembly 40, so as to protect the key stress parts without affecting the test operation and observation, and prevent foreign objects from entering or abnormal damage to the parts from causing safety hazards.

[0045] Working principle Reference Figures 1 to 5 As shown, in actual operation, two test motors 60 are first installed on their respective mounting bases 21, so that the output shafts of the test motors 60 are coaxially connected to the transmission shaft 32 in the coupling assembly 30. Then, the active test motor 60 is driven by the first driver 52, and the coupling assembly 30 transmits torque between the two test motors 60, causing the passive load motor to enter a driven state. In the no-load state, the drive component 41 is in the retracted position, the pressure component 42 is away from the coupling assembly 30, and the radial loading component 40 does not apply a radial simulated load, used to test the initial operating performance of the motor 60.

[0046] Under load, by adjusting the precision pressure reducing valve 412 and the solenoid directional valve 413, the drive component 41 pushes the pressure-applying component 42 gradually closer to the coupling assembly 30, and applies a stable radial simulated load to the coupling assembly 30 with the cooperation of the transition bearing 43. Under unload, the solenoid directional valve 413 switches the operating condition, the drive component 41 reverses its movement, and the pressure-applying component 42 gradually moves away from the coupling assembly 30, and the radial simulated load is smoothly released. Adjustment of the speed control valve 414 avoids shocks caused by sudden load changes.

[0047] Through the above structure and working method, the motor durability testing equipment provided in this embodiment can perform real and reliable durability performance testing on the test motor 60 under various stress conditions, while taking into account both equipment safety and energy utilization efficiency.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor durability testing device, characterized in that, include: Machine (10); Mounting assembly (20) includes at least two mounting bases (21) arranged at a distance from each other, the mounting bases (21) being used to mount the test motor (60); A coupling assembly (30) is disposed between two mounting bases (21), and the coupling assembly (30) has receiving holes (321) at both ends for the output shaft of the test motor (60) to extend into. A radial loading assembly (40) is disposed on the mounting base (21). The radial loading assembly (40) includes a driving member (41) and a pressure-applying member (42). The pressure-applying member (42) is movably disposed within the mounting base (21), and a pressure-applying surface (423) adapted to the shape of the coupling assembly (30) is formed on the side facing the coupling assembly (30). The driving member (41) is vertically mounted on the mounting base (21), and its output end is connected to the pressure-applying member (42). The driving member (41) is used to drive the pressure-applying member (42) to move in a direction perpendicular to the axis of the coupling assembly (30), so that the pressure-applying surface (423) applies a radial force to the coupling assembly (30), thereby applying a radial simulated load to it. An energy feedback component (50) is electrically connected to two test motors (60) to rectify the electrical energy generated by one of the test motors (60) in the driven state and feed it back to the power supply side of the other test motor (60), forming an energy recovery path.

2. The motor durability testing equipment according to claim 1, characterized in that, The top of the mounting base (21) is provided with a through hole (213) connecting its interior and exterior; the pressure-applying member (42) includes a connecting part (421) and a pressure-applying part (422); one end of the connecting part (421) is fixedly connected to the pressure-applying part (422), and the other end extends through the through hole (213) to the outside of the mounting base (21) and is fixedly connected to the output end of the driving member (41); the pressure-applying part (422) is located inside the mounting base (21), and the size of the pressure-applying part (422) is larger than the diameter of the through hole (213).

3. The motor durability testing equipment according to claim 2, characterized in that, The pressure surface (423) is disposed on the pressure part (422); the pressure surface (423) is constructed as a concave arc-shaped contact surface, and the arc-shaped contact surface is adapted to the shape of the coupling assembly (30).

4. The motor durability testing equipment according to claim 2, characterized in that, The radial loading assembly (40) further includes a transition bearing (43) coaxially sleeved outside the coupling assembly (30); the inner ring (431) of the transition bearing (43) is interference-fitted with the coupling assembly (30) to rotate synchronously with the coupling assembly (30); the pressure part (422) has an arc-shaped contact surface on the side facing the transition bearing (43) that matches the radius of the outer ring (432) of the transition bearing (43); the pressure part (422) presses against the outer wall of the outer ring of the transition bearing (43) through the arc-shaped contact surface under the drive of the drive member (41) to restrict the outer ring (432) from rotating with the inner ring (431).

5. The motor durability testing equipment according to claim 1, characterized in that, The driving component (41) is a cylinder, and the device also includes a pneumatic control circuit connected to the cylinder; the pneumatic control circuit is provided with an air source processing unit (411), a precision pressure reducing valve (412) and an electromagnetic reversing valve (413) in sequence along the airflow direction; the air source processing unit (411) is connected to an external compressed air source and is used to perform water removal filtration, oil mist separation and primary pressure regulation on the input compressed air; the precision pressure reducing valve (412) is connected between the air source processing unit (411) and the electromagnetic reversing valve (413) and is used to regulate the pressure of the compressed air after it has been processed by the air source processing unit (411) so as to set the standard pressure value of the radial simulated load output by the cylinder.

6. The motor durability testing equipment according to claim 5, characterized in that, The pneumatic control circuit also includes at least one speed control valve (414); the speed control valve (414) is connected in series on the pipeline connecting the electromagnetic reversing valve (413) and the cylinder; the speed control valve (414) is used to adjust the flow rate of compressed air flowing through the cylinder and control the loading speed of the pressure application element (42) moving towards the coupling assembly (30) so as to achieve smooth contact between the pressure application element (42) and the coupling assembly (30).

7. The motor durability testing equipment according to claim 1, characterized in that, The coupling assembly (30) includes a torque sensor (31) disposed between two mounting bases (21), a drive shaft (32) located on both sides of the torque sensor (31), and a coupling (33) disposed between the drive shaft (32) and the torque sensor (31); one end of the drive shaft (32) is connected to the torque sensor (31) through the coupling (33), and the other end is provided with a receiving hole (321) for the output shaft of the test motor to extend into.

8. The motor durability testing equipment according to claim 1, characterized in that, The energy feedback component (50) includes a DC bus (51), a first driver (52), and a second driver (53); wherein, one test motor serves as an active test motor (60), and the other test motor (60) serves as a passive load motor; the first driver (52) is electrically connected to the active test motor (60) and is used to provide driving power to the active test motor (60); the second driver (53) is electrically connected to the passive load motor and is used to rectify the output power of the passive load motor when it is driven; the DC bus (51) is electrically connected to the first driver (52) and the second driver (53) respectively, so that the power generated by the passive load motor is rectified by the second driver (53) and fed back to the DC bus (51), and then flows back to the first driver (52) from the DC bus (51), thereby forming an energy recovery loop.

9. The motor durability testing equipment according to claim 7, characterized in that, The mounting base is a hollow structure. The mounting base (21) has a first shaft hole (211) and a second shaft hole (212) on opposite sides along the axial direction. The transmission shaft (32) passes through the mounting base (21), with one end extending through the first shaft hole (211) and connected to the coupling (33). The output shaft of the test motor (60) extends into the mounting base (21) through the second shaft hole (212) and is coaxially connected to the other end of the transmission shaft (32). The diameter of the first shaft hole (211) is larger than the diameter of the second shaft hole (212).

10. The motor durability testing equipment according to claim 1, characterized in that, The device also includes a protective cover (70) disposed between the two mounting bases (21); the protective cover (70) covers the coupling assembly (30).

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