A bearing testing device

Abstract

This invention discloses a bearing testing device, relating to the field of liquid rocket engine technology. The bearing testing device includes a housing, a rotating shaft, a bearing under test, a force loading assembly, a heating assembly, and a first temperature sensor. The housing has a receiving cavity, and the housing has a medium outlet and a medium inlet communicating with the receiving cavity. The rotating shaft passes through the receiving cavity and is rotatably engaged with the housing. The bearing under test is mounted on the rotating shaft and located within the receiving cavity. The force loading assembly is installed on the housing and has one end extending into the receiving cavity; the force loading assembly is used to apply radial and axial loads to the bearing under test. The heating assembly is disposed in the housing for heating the bearing under test. The first temperature sensor is disposed in the housing for detecting the temperature of the bearing under test.

Description

Technical Field

[0001] This invention relates to the field of liquid rocket engine technology, and more specifically to a bearing testing device. Background Technology

[0002] During the recovery process of reusable cryogenic liquid rockets, the temperature of the turbopump bearing cavity may suddenly rise. This process can cause the cryogenic oxidizer or fuel to vaporize, leading to a sharp deterioration in bearing lubrication conditions and affecting the bearing's operating condition during engine re-ignition. The bearing in the turbopump is a critical component that supports the shaft system and ensures the pump's high-speed rotation, directly affecting the engine's operational reliability. Deterioration in the bearing's operating condition can pose a risk to the normal operation of the engine.

[0003] The entire process described above involves dynamic and variable bearing rotation, temperature, and pressure, making it difficult to calculate accurately using simulation technology. Ground-based cryogenic bearing tests are necessary to assess the bearing's operational margin under thermal backlash conditions. Currently, there is research on test equipment for cryogenic bearings in the field of launch vehicles, but no specific test equipment or methods exist to assess the impact of thermal backlash during secondary ignition of reusable cryogenic liquid rocket engines on bearings. Summary of the Invention

[0004] The purpose of this invention is to provide a bearing testing device to test the impact of thermal backflow during secondary ignition of reusable cryogenic liquid rocket engines on bearings.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a bearing testing device, comprising: The housing has a receiving cavity, and the housing has a medium outlet and a medium inlet communicating with the receiving cavity; A rotating shaft passes through the receiving cavity and is rotatably engaged with the housing. The bearing under test is assembled on the rotating shaft and located within the receiving cavity; A force loading assembly, which is mounted on the housing and has one end extending into the receiving cavity, is used to apply radial and axial loads to the bearing under test; A heating component, disposed in the housing, is used to heat the bearing under test; A first temperature sensor is disposed in the housing and is used to detect the temperature of the bearing under test.

[0006] Optionally, in the above-described bearing testing apparatus, the force loading component includes: A first bearing is mounted on the rotating shaft and is located on the first side of the bearing under test. A force guiding component is disposed within the receiving cavity, and the force guiding component abuts against the end of the first bearing away from the bearing being tested; A first thrust member is disposed in the housing and located on the side of the first bearing away from the bearing under test. The first thrust member has a loading end that moves axially along the shaft. The loading end of the first thrust member is used to contact the force guiding component to apply an axial thrust close to the bearing under test to the force guiding component.

[0007] Optionally, in the above-described bearing testing apparatus, the first thrust member includes: A first outer shell, which is fixedly connected to the housing, has a first air chamber communicating with the receiving cavity; A first piston rod is slidably disposed in the first air chamber along the axial direction of the rotating shaft, and a first piston is fixed on the first piston rod. The outer peripheral surface of the first piston is in sealed sliding contact with the inner peripheral wall of the first housing. The first piston rod is used to apply an axial thrust close to the bearing under test to the force guiding component.

[0008] Optionally, in the above-described bearing testing device, one end of the housing has a through hole along its own axial direction, and the first thrust member further includes: A force transmission shaft is movably disposed within the through hole along the axial direction of the housing. One end of the force transmission shaft is engaged with one end of the force guiding component via a spherical joint. The end of the first piston rod away from the first piston abuts against the force transmission shaft, which is used to apply a thrust close to the force guiding component to the force transmission shaft. Multiple balls are arranged circumferentially and axially between the outer peripheral surface of the force transmission shaft and the inner peripheral surface of the through hole.

[0009] Optionally, in the above-described bearing testing apparatus, the force guiding component abuts against the outer peripheral surface of the first bearing away from the rotating shaft, and the force loading assembly further includes: A second thrust member is disposed in the housing and has a loading end that moves radially along the axis of rotation. The loading end of the second thrust member is used to contact the force guiding member to apply a radial thrust to the force guiding member.

[0010] Optionally, in the above-described bearing testing apparatus, the second thrust member includes: The second outer shell is fixedly connected to the housing, and the second outer shell has a second air cavity communicating with the receiving cavity; The second piston rod is radially slidably disposed in the second air chamber along the rotating shaft, and a second piston is fixed on the second piston rod. The outer peripheral surface of the second piston is in sealed sliding contact with the inner peripheral wall of the second housing. The second piston rod has one end for contacting the force guiding component and for applying radial thrust to the force guiding component.

[0011] Optionally, in the above-described bearing testing device, the bearing testing device further includes a second bearing, which is mounted on the rotating shaft and located on the second side of the bearing under test.

[0012] Optionally, in the bearing testing device described above, the medium inlet is located on the side of the first bearing away from the bearing under test, and there are two medium outlets, one of which is located between the axial positions of the bearing under test and the second bearing, and the other of which is located on the side of the second bearing away from the bearing under test.

[0013] Optionally, in the above-described bearing testing device, the bearing testing device further includes a second temperature sensor, which is disposed in the housing and distributed at the medium outlet and the medium inlet, for detecting the temperature of the medium.

[0014] Optionally, in the bearing testing device described above, the heating component includes an electromagnetic heating coil, which is sleeved on the outer peripheral surface of the housing.

[0015] Compared with the prior art, the bearing testing device provided in this application has a housing with a receiving cavity and a medium inlet and a medium outlet. A rotating shaft passes through the receiving cavity and rotates with the housing. The bearing to be tested is assembled on the rotating shaft. A force loading component is installed on the housing and applies a load to the bearing to be tested. A heating component is set on the housing. A first temperature sensor is also set on the housing to monitor the temperature of the bearing to be tested. During operation, at the start of the test, the cryogenic medium flows into the housing cavity through the medium inlet to cool the bearing under test until it reaches the preset temperature. Then, the flow rate of the cryogenic medium is increased to the working flow rate. After that, the shaft is started and raised to the rated speed. Once the speed stabilizes, the force loading component applies radial and axial loads to the bearing under test, simulating the actual working conditions, to simulate the working conditions of the bearing under test under the rated working conditions of the engine. When it is necessary to simulate the thermal backflow process, the axial and radial loads are removed, the bearing rotation and cryogenic medium supply are stopped, and the heating component is started to heat the housing. The temperature of the bearing under test rises, and the first temperature sensor monitors the temperature of the bearing under test in real time until the temperature of the bearing under test reaches the preset simulated thermal backflow state temperature. Subsequently, the cryogenic medium at the working flow rate is reintroduced into the housing cavity, and the shaft is driven to rotate and the force loading component is started again, so that the bearing under test can resume operation in this relatively high temperature environment with insufficient pre-cooling, thereby completing the test of the bearing under test. With this setup, the bearing testing device can fully simulate the working environment under thermal backlash by actively heating the heating component and detecting and controlling the temperature of the bearing under test by the first temperature sensor. It can also assess the working margin of the bearing under test under thermal backlash conditions, overcoming the shortcomings of existing technologies that cannot simulate and assess the working performance of bearings under insufficient pre-cooling conditions caused by thermal backlash. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a cross-sectional schematic diagram of a bearing testing device provided in an embodiment of the present invention.

[0017] Reference numerals: 100 is the housing, 110 is the receiving cavity, 120 is the medium inlet, 130 is the medium outlet, 200 is the rotating shaft, 300 is the bearing under test, 400 is the force loading component, 410 is the first bearing, 420 is the force guiding component, 430 is the first thrust component, 431 is the first outer shell, 432 is the first piston rod, 433 is the force transmission shaft, 434 is the ball bearing, 440 is the second thrust component, 441 is the second outer shell, 442 is the second piston rod, 500 is the heating component, 600 is the first temperature sensor, and 700 is the second bearing. Detailed Implementation

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Please see Figure 1The bearing testing device provided by the present invention includes a housing 100, a rotating shaft 200, a bearing under test 300, a force loading assembly 400, a heating assembly 500, and a first temperature sensor 600. The housing 100 has a receiving cavity 110, and the housing 100 has a medium outlet 130 and a medium inlet 120 communicating with the receiving cavity 110. The rotating shaft 200 passes through the receiving cavity 110 and is rotatably coupled to the housing 100. The bearing under test 300 is mounted on the rotating shaft 200 and located within the receiving cavity 110. The force loading assembly 400 is installed on the housing 100 and has one end extending into the receiving cavity 110. The force loading assembly 400 is used to apply radial and axial loads to the bearing under test 300. The heating assembly 500 is disposed in the housing 100 and is used to heat the bearing under test 300. The first temperature sensor 600 is disposed in the housing 100 and is used to detect the temperature of the bearing under test 300.

[0024] In practice: the cryogenic medium flows into the receiving cavity 110 through the medium inlet 120 to cool the bearing 300 under test until it reaches the preset temperature. Then, the flow rate of the cryogenic medium is increased to the working flow rate. After that, the rotating shaft 200 is started and raised to the rated speed. After the speed stabilizes, the force loading component 400 applies radial and axial loads to the bearing 300 under test, simulating the actual working conditions, to simulate the working conditions of the bearing 300 under the rated working conditions of the engine. When it is necessary to simulate the thermal backflow process, the axial and radial loads are removed, and the bearing rotation is stopped. With the supply of cryogenic medium, the heating component 500 is activated to heat the housing 100, causing the temperature of the bearing under test 300 to rise. The first temperature sensor 600 monitors the temperature of the bearing under test 300 in real time until the temperature of the bearing under test 300 reaches the preset simulated thermal backlash temperature. Subsequently, the working flow rate of cryogenic medium is reintroduced into the receiving cavity 110, and the rotating shaft 200 is driven to rotate again, and the force loading component 400 is activated, allowing the bearing under test 300 to resume operation in this relatively high temperature environment with insufficient pre-cooling, thereby completing the test of the bearing under test 300. In this configuration, through the active heating of the heating component 500 and the detection and control of the temperature of the bearing under test 300 by the first temperature sensor 600, the bearing testing device can fully simulate the working environment under thermal backlash and assess the working margin of the bearing under test 300 under thermal backlash conditions, overcoming the shortcomings of existing technologies that cannot simulate and assess the working performance of bearings under insufficient pre-cooling conditions caused by thermal backlash.

[0025] As one possible implementation, the force loading assembly 400 includes a first bearing 410, a force guiding component 420, and a first thrust component 430; wherein, the first bearing 410 is mounted on the rotating shaft 200 and is located on the first side of the bearing 300 under test; the force guiding component 420 is disposed in the receiving cavity 110 and abuts against the end of the first bearing 410 away from the bearing 300 under test; the first thrust component 430 is disposed in the housing 100 and is located on the side of the first bearing 410 away from the bearing 300 under test, the first thrust component 430 has a loading end that moves axially along the rotating shaft 200, and the loading end of the first thrust component 430 is used to contact the force guiding component 420 to apply an axial thrust close to the bearing 300 under test to the force guiding component 420. In practice, when an axial load needs to be applied to the bearing 300 under test, the loading end of the first thrust member 430 moves axially along the shaft 200 and pushes the guide member 420. The guide member 420 transmits the thrust to the first bearing 410. After bearing the thrust, the first bearing 410 transmits the axial force to the shaft 200. This axial thrust is then transmitted to the bearing 300 under test through the shaft 200, allowing the bearing 300 under test to bear a preset axial load. By introducing the first bearing 410, the bearing 300 under test is subjected to axial thrust by the first thrust member 430. This allows the applied load to be transmitted more smoothly to the bearing 300 under test through the first bearing 410 and the shaft 200, helping to reduce the impact or off-center load that may result from directly applying the axial thrust to the bearing 300 under test. This more realistically simulates the stress condition of the bearing under actual working conditions, improving the accuracy and reliability of the test results.

[0026] Furthermore, the first thrust member 430 includes a first housing 431 and a first piston rod 432. The first piston rod 432 is slidably disposed in the first air chamber along the axial direction of the rotating shaft 200, and a first piston is fixed on the first piston rod 432. The outer peripheral surface of the first piston is in sealed sliding contact with the inner peripheral wall of the first housing 431. The first piston rod 432 is used to apply axial thrust to the side of the force guide member 420 away from the first bearing 410. In specific implementation, when it is necessary to apply an axial load to the bearing 300 under test, pressurized gas is introduced into the first air chamber. The gas pressure acts on the first piston, pushing the first piston rod 432 to slide axially towards the force guide member 420. The end of the first piston rod 432 then pushes the force guide member 420, thereby transmitting the axial thrust to the bearing 300 under test through the force guide member 420 and the first bearing 410. By adjusting the pressure of the introduced gas, the magnitude of the applied axial thrust can be precisely controlled, achieving a smooth loading of the axial load on the bearing 300 under test. Meanwhile, this method of applying load allows for easy calculation of the axial load value applied to the force guide component 420 by detecting the gas pressure in the first air chamber and combining it with the known surface area of ​​the first piston, making load control simpler.

[0027] Furthermore, such as Figure 1 As shown, one end of the housing 100 has a through hole along its own axial direction. The first thrust member 430 also includes a force transmission shaft 433 and a plurality of balls 434. The force transmission shaft 433 is movably disposed in the through hole along the axial direction of the housing 100. One end of the force transmission shaft 433 is engaged with one end of the force guiding member 420 through a spherical pair. The thrust end of the first piston rod 432 away from the first piston abuts against the force transmission shaft 433 to apply a thrust close to the force guiding member 420 to the force transmission shaft 433. The plurality of balls 434 are disposed between the outer circumferential surface of the force transmission shaft 433 and the inner circumferential surface of the through hole along the circumferential and axial directions of the force transmission shaft 433.

[0028] Specifically, the force transmission shaft 433 passes through a through hole in the housing 100, with one end abutting against the force guiding component 420 via a spherical joint, and the other end contacting the thrust end of the first piston rod 432. The shaft body of the force transmission shaft 433 is supported and guided within the through hole in the housing 100 by multiple balls 434 distributed along its circumference and axial direction. It can be understood that the outer diameter of the force transmission shaft 433 can be divided into a large diameter section and a small diameter section with different sizes along its own axial direction. The large diameter section slides in contact with the through hole, while the small diameter section forms a gap with the through hole for the balls 434 to be positioned. During operation, when pressurized gas is introduced into the first air chamber, pushing the first piston and first piston rod 432 toward the housing 100, the thrust end of the first piston rod 432 pushes the force transmission shaft 433. Guided by multiple balls 434, the force transmission shaft 433 slides axially within the through hole, transmitting the thrust to the spherical joint at its end. Due to the self-aligning effect of the spherical joint, the direction of the thrust is always coaxial with the force guide component 420, ensuring the stability of the axial force applied by the force guide component 420 to the first bearing 410, thereby ensuring the stability of the axial load borne by the tested bearing 300. Simultaneously, the arrangement of the balls 434 reduces frictional resistance during force transmission and avoids potential force misalignment, ensuring that the axial load is accurately and stably applied to the tested bearing 300, thus improving the accuracy and reliability of the test.

[0029] As one possible implementation, such as Figure 1 As shown, the force guiding component 420 abuts against the outer peripheral surface of the first bearing 410 away from the rotating shaft 200. The force loading assembly 400 also includes a second thrust component 440, which is disposed in the housing 100 and has a loading end that moves radially along the rotating shaft 200. The loading end of the second thrust component 440 is used to contact the force guiding component 420 to apply a radial thrust to the force guiding component 420. When it is necessary to simulate a radial load, the loading end of the second thrust component 440 is driven to move radially toward the rotating shaft 200. The loading end of the second thrust component 440 pushes the force guiding component 420, and the force guiding component 420 transmits this radial thrust to the outer ring of the first bearing 410 that abuts against it. After the first bearing 410 bears this radial force, it acts on the rotating shaft 200 through its inner ring, and then transmits it to the bearing under test 300 through the rotating shaft 200, so that the bearing under test 300 bears a preset radial load. By setting an independent second thrust member 440 and cooperating with the force guiding member 420 and the first bearing 410, the radial load on the bearing under test 300 is indirectly applied, which can simulate the radial force condition that the bearing is subjected to in actual operation. Combined with axial loading, it can more comprehensively simulate the complex stress state of the bearing, and make the applied radial load more smoothly applied to the bearing under test 300 through the transmission of the first bearing 410 and the rotating shaft 200. This helps to reduce the impact or off-center load that may be caused by directly applying radial thrust to the bearing under test 300.

[0030] Furthermore, the second thrust member 440 includes a second outer shell 441 and a second piston rod 442; the second outer shell 441 is fixedly connected to the housing 100, and the second outer shell 441 has a second air chamber communicating with the receiving cavity 110; the second piston rod 442 is slidably disposed in the second air chamber along the radial direction of the rotating shaft 200, and a second piston is fixed on the second piston rod 442, the outer peripheral surface of the second piston is in sealed sliding contact with the inner peripheral wall of the second outer shell 441, and the second piston rod 442 has one end for contacting the force guiding member 420, for applying radial thrust to the force guiding member 420.

[0031] When a radial load needs to be applied, pressurized gas is introduced into the second air chamber. The gas pressure acts on the second piston, pushing the second piston rod 442 to slide radially towards the force guide component 420. The end of the second piston rod 442 then pushes against the side of the force guide component 420, thereby transmitting the radial thrust through the force guide component 420 and the first bearing 410 to the rotating shaft 200 and the bearing under test 300. By adjusting the gas pressure introduced into the second air chamber, the magnitude of the applied radial thrust can be easily controlled, thus achieving the application of a radial load to the bearing under test 300. This pneumatic radial loading method, combined with the aforementioned first thrust component 430, can accurately simulate the multi-directional composite loads experienced by the bearing under test 300 during actual operation, improving the simulation realism of the test. Furthermore, by detecting the gas pressure in the second air chamber and combining it with the known surface area of ​​the second piston, the radial load value applied to the force guide component 420 can be easily calculated, making load control even simpler.

[0032] As one possible implementation, such as Figure 1 As shown, the bearing testing device also includes a second bearing 700, which is mounted on the rotating shaft 200 and is located on the second side of the bearing 300 under test.

[0033] During operation, when the external drive device drives the rotating shaft 200 to rotate, and the force loading component 400 applies a load to the tested bearing 300 through the first bearing 410 and the rotating shaft 200, the rotating shaft 200 will be in a state of being under force and rotating. At this time, the second bearing 700 located on the other side of the tested bearing 300 provides radial support to the end of the rotating shaft 200 on that side, and together with the first bearing 410, constrains the rotating shaft 200, so that it can remain stable when rotating and bearing load. This ensures that the load transmitted from the first bearing 410 to the tested bearing 300 is stable, effectively avoiding interference with the test results due to the instability of the rotating shaft 200, and making the performance evaluation results of the tested bearing 300 more accurate and reliable.

[0034] As one possible implementation, such as Figure 1As shown, the medium inlet 120 is located on the side of the first bearing 410 away from the bearing 300 under test, and there are two medium outlets 130. One medium outlet 130 is located between the axial positions of the bearing 300 under test and the second bearing 700, and the other medium outlet 130 is located on the side of the second bearing 700 away from the bearing 300 under test.

[0035] During operation, the cryogenic medium enters the receiving cavity 110 through the medium inlet 120, first flowing through and cooling the first bearing 410. Then, the medium flows axially through the intermediate bearing under test 300 for cooling and lubrication. Afterward, a portion of the medium flows out from the first medium outlet 130 located between the bearing under test 300 and the second bearing 700, while the remaining portion continues to flow through the second bearing 700 and is cooled before flowing out from the second medium outlet 130 located at the far end of the second bearing 700. By placing the medium inlet 120 at one end of the shaft and arranging the two outlets sequentially along the flow path, the flow rate of the medium flowing out from the medium outlet 130 located between the bearing under test 300 and the second bearing 700 can be changed by adjusting the opening of the two medium outlets 130. This allows for adjustment of the medium flow rate to the second bearing 700, enabling flexible adjustment of the flow field within the bearing testing device to simulate the flow field under actual working conditions. Furthermore, by adjusting the medium flow rate to the second bearing 700, the support effect of the second bearing 700 can be controlled, improving the simulation effect and support controllability of the test.

[0036] As one possible implementation, such as Figure 1 As shown, the bearing testing device also includes a second temperature sensor, which is located in the housing 100 and distributed at the medium outlet 130 and the medium inlet 120, for detecting the temperature of the medium. During operation, the low-temperature medium flows into the receiving cavity 110 from the medium inlet 120, cools and lubricates the bearing, and then flows out from the medium outlet 130. The second temperature sensor located at the medium inlet 120 is used to monitor the initial temperature of the medium entering the receiving cavity 110 to ensure that it reaches the low temperature required for the test. The second temperature sensor located at the outlet is used to monitor the temperature of the medium flowing out of the receiving cavity 110, which reflects the temperature rise of the medium after absorbing heat from the bearing and the cavity. By monitoring and comparing the medium temperatures at these two locations in real time, it can be determined whether the overall thermal environment in the test cavity is in the preset state, enhancing the controllability of the entire test process and the reliability of the data.

[0037] As one possible implementation, such as Figure 1As shown, the heating component 500 includes an electromagnetic heating coil, which is sleeved on the outer peripheral surface of the housing 100. When it is necessary to simulate the thermal backflow process, current is passed through the electromagnetic heating coil, thereby heating the housing 100. The heat is conducted through the wall of the housing 100 to the internal receiving cavity 110, heating the environment inside the cavity and the bearing 300 under test located therein, so that the temperature of the bearing 300 under test gradually rises from a pre-cooled state to the target temperature for simulating thermal backflow. By using an electromagnetic heating coil sleeved on the outer periphery of the housing 100, controllable heating of the bearing 300 under test is achieved, with high heating efficiency and relatively uniform heat distribution, which can accurately simulate the intrusion process of external heat flow into the bearing cavity; at the same time, since the heating occurs on the outside of the receiving cavity 110, it does not directly contact the internal low-temperature medium and the bearing 300 under test, thus improving the safety of the test.

[0038] As one possible implementation, the bearing testing device also includes a pressure sensor, which is installed in the housing 100 to detect the pressure in the receiving cavity 110. By using a pressure sensor to detect the pressure in the receiving cavity 110, real-time monitoring of the cavity pressure is achieved, ensuring that the test environment can accurately simulate the specific cavity pressure conditions when the cryogenic liquid rocket turbopump is working. At the same time, the cavity pressure data, combined with parameters such as temperature, load, and rotational speed, helps to more comprehensively evaluate the overall working status and performance of the tested bearing 300 under simulated operating conditions.

[0039] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bearing testing device, characterized in that, include: The housing has a receiving cavity, and the housing has a medium outlet and a medium inlet communicating with the receiving cavity; A rotating shaft passes through the receiving cavity and is rotatably engaged with the housing. The bearing under test is assembled on the rotating shaft and located within the receiving cavity; A force loading assembly, which is mounted on the housing and has one end extending into the receiving cavity, is used to apply radial and axial loads to the bearing under test; A heating component, disposed in the housing, is used to heat the bearing under test; A first temperature sensor is disposed in the housing and is used to detect the temperature of the bearing under test.

2. The bearing testing device according to claim 1, characterized in that, The force loading component includes: A first bearing is mounted on the rotating shaft and is located on the first side of the bearing under test. A force guiding component is disposed within the receiving cavity, and the force guiding component abuts against the end of the first bearing away from the bearing being tested; A first thrust member is disposed in the housing and located on the side of the first bearing away from the bearing under test. The first thrust member has a loading end that moves axially along the shaft. The loading end of the first thrust member is used to contact the force guiding component to apply an axial thrust close to the bearing under test to the force guiding component.

3. The bearing testing device according to claim 2, characterized in that, The first thrust member includes: A first outer shell, which is fixedly connected to the housing, has a first air chamber communicating with the receiving cavity; A first piston rod is slidably disposed in the first air chamber along the axial direction of the rotating shaft, and a first piston is fixed on the first piston rod. The outer peripheral surface of the first piston is in sealed sliding contact with the inner peripheral wall of the first housing. The first piston rod is used to apply an axial thrust close to the bearing under test to the force guiding component.

4. The bearing testing device according to claim 3, characterized in that, One end of the housing has a through hole along its own axial direction, and the first thrust member further includes: A force transmission shaft is movably disposed in the through hole along the axial direction of the housing. One end of the force transmission shaft is engaged with one end of the force guiding component through a spherical pair. The thrust end of the first piston rod away from the first piston abuts against the force transmission shaft to apply a thrust close to the force guiding component to the force transmission shaft. Multiple balls are arranged circumferentially and axially between the outer peripheral surface of the force transmission shaft and the inner peripheral surface of the through hole.

5. The bearing testing device according to claim 2, characterized in that, The force guiding component abuts against the outer peripheral surface of the first bearing away from the rotating shaft, and the force loading assembly further includes: A second thrust member is disposed in the housing and has a loading end that moves radially along the axis of rotation. The loading end of the second thrust member is used to contact the force guiding member to apply a radial thrust to the force guiding member.

6. The bearing testing device according to claim 5, characterized in that, The second thrust member includes: The second outer shell is fixedly connected to the housing, and the second outer shell has a second air cavity communicating with the receiving cavity; The second piston rod is radially slidably disposed in the second air chamber along the rotating shaft, and a second piston is fixed on the second piston rod. The outer peripheral surface of the second piston is in sealed sliding contact with the inner peripheral wall of the second housing. The second piston rod has one end for contacting the force guiding component and for applying radial thrust to the force guiding component.

7. The bearing testing device according to claim 2, characterized in that, The bearing testing device further includes a second bearing, which is mounted on the rotating shaft and located on the second side of the bearing under test.

8. The bearing testing device according to claim 7, characterized in that, The medium inlet is located on the side of the first bearing away from the bearing under test, and there are two medium outlets, one of which is located between the bearing under test and the second bearing in the axial direction, and the other of which is located on the side of the second bearing away from the bearing under test.

9. The bearing testing device according to claim 1, characterized in that, The bearing testing device further includes a second temperature sensor, which is disposed in the housing and distributed at the medium outlet and the medium inlet, for detecting the temperature of the medium.

10. The bearing testing device according to claim 1, characterized in that, The heating component includes an electromagnetic heating coil, which is sleeved on the outer peripheral surface of the housing.

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