A bearing grease adhesion detection device and method

Abstract

This application discloses a bearing grease adhesion testing device and method. The testing device includes an environmental simulation chamber, a simulation mechanism body, a load loading mechanism, and a testing mechanism. The environmental simulation chamber includes a base plate, a cover, and a temperature and humidity control component. The cover is mounted on the base plate, and the temperature and humidity control component is used to adjust the temperature and humidity inside the environmental simulation chamber. The simulation mechanism body includes a mounting plate, a torque detection component, a simulated bearing, a shaft, and a rotation drive component. The load loading mechanism is used to apply axial and radial loads to the shaft. In this application, the temperature and humidity control component can reproduce the complex environment of actual bearing use, simultaneously applying axial and radial loads and driving the shaft to rotate, simulating the combined stress state of the bearing during operation. The combination of torque detection and image observation not only quantifies the influence of adhesion on friction but also visually displays the adhesion morphology of the grease, improving the accuracy and reliability of the evaluation.

Description

Technical Field

[0001] This application relates to the field of grease performance testing, specifically to a bearing grease adhesion testing device and method. Background Technology

[0002] As a core component of mechanical transmission, bearings' lubrication performance is crucial, directly affecting the lifespan and reliability of equipment. With the continuous development of modern machinery industry, the operating environments of various mechanical equipment are becoming increasingly complex and diverse, placing ever higher demands on bearing performance. From everyday household appliances to large industrial equipment, from ordinary indoor environments to special high-humidity environments, bearings play a key role. Good lubrication can effectively reduce bearing wear, lower energy loss, improve equipment operating efficiency, and thus ensure the stable operation of the entire mechanical equipment.

[0003] In the past, there were various methods for handling bearing lubrication. Regarding grease selection, technicians would choose greases of appropriate viscosity based on experience, hoping to balance friction and grease loss. The adhesion of bearing lubricating oil was typically tested using static methods or in a no-load, laboratory environment. These methods were common practices in the industry at the time, aiming to ensure that the bearing's lubrication performance met the equipment's operational requirements from different perspectives.

[0004] However, existing technologies have significant drawbacks. Firstly, it's difficult to precisely control the appropriate viscosity when selecting grease. Grease with excessive viscosity increases friction, while grease with too low viscosity is prone to leakage, both of which negatively impact bearing operation. Secondly, existing static testing or no-load, laboratory-based testing methods for testing lubricant adhesion do not simulate the actual load conditions and temperature / humidity requirements of bearing operation, leading to significant discrepancies between test results and engineering applications. Furthermore, they cannot monitor the dynamic distribution of lubricant within the bearing in real time, making it difficult to pinpoint grease failure modes and failing to adequately meet the lubrication requirements of bearings in complex environments. Summary of the Invention

[0005] To address the technical problems in the prior art, this application provides a bearing grease adhesion testing device and method.

[0006] The bearing grease adhesion testing device and method provided in this application adopts the following technical solution:

[0007] A bearing grease adhesion testing device, comprising:

[0008] An environmental simulation chamber includes a base plate, a cover, and a temperature and humidity control component. The cover is placed on the base plate, forming an environmental simulation cavity. The temperature and humidity control component is used to adjust the temperature and humidity inside the environmental simulation cavity.

[0009] The main body of the simulation mechanism includes a mounting plate, a torque detection component, a simulated bearing, a shaft, and a rotation drive component. The mounting plate is positioned above the base plate via the torque detection component, which is used to detect the torque between the mounting plate and the base plate. The simulated bearing is filled with grease to be tested. The outer ring of the simulated bearing is made of a transparent material and is fixed to the mounting plate. The shaft is fixedly inserted into the inner ring of the simulated bearing. The rotation drive component is connected to one end of the shaft and is used to drive the shaft to rotate.

[0010] A load loading mechanism is connected to the other end of the shaft and is used to apply axial and radial loads to the shaft.

[0011] The testing mechanism includes a camera assembly for acquiring images of the simulated bearing to obtain the distribution of grease within the simulated bearing.

[0012] In some embodiments, the load loading mechanism includes a fixed block, a push plate, an axial pushing assembly, a turntable, a slider, a connector, and a radial pushing assembly. The fixed block is fixed to the base plate and has a receiving groove. The push plate is slidably disposed in the receiving groove and can move axially along the shaft. The axial pushing assembly is connected to both the fixed block and the push plate and is used to apply a preset amount of thrust to the push plate. The turntable is rotatably connected to the push plate and has several sliding grooves that extend radially along the turntable. The slider is slidably disposed in the sliding grooves. One end of the connector is fixedly connected to the slider, and the other end of the connector is fixedly connected to the other end of the shaft. The radial pushing assembly is used to apply a radial thrust to the slider.

[0013] In some embodiments, the fixing block has a plurality of first screw holes communicating with the receiving groove, the axial pushing assembly includes a plurality of axial pushing members, the axial pushing members include a first screw and an axial pressure sensor, the first screw is threaded into the corresponding first screw hole, one end of the first screw abuts against one end of the axial pressure sensor, and the other end of the axial pressure sensor abuts against the push plate.

[0014] In some embodiments, the radial pushing assembly includes a plurality of radial pushing members, each radial pushing member including a base block, a second screw, and a radial pressure sensor. The base block is fixed in the groove, and a second screw hole is provided on the base block. The second screw is threaded into the corresponding second screw hole, one end of the second screw abuts against one end of the radial pressure sensor, and the other end of the radial pressure sensor abuts against the slider.

[0015] In some embodiments, the torque detection assembly includes an anti-rotation block and two resistance detection pressure sensors. The anti-rotation block is fixed to the base plate. A positioning groove is provided at the lower end of the mounting plate. The anti-rotation block is located in the positioning groove. The upper end face of the anti-rotation block is arc-shaped and in line contact with the inner top surface of the positioning groove. The two resistance detection pressure sensors are respectively fixed on both sides of the anti-rotation block and abut against the two opposite inner sidewalls of the positioning groove.

[0016] In some embodiments, the cover includes four side panels and a top plate, with the four side panels fixed to the bottom plate and the top plate fixed to the four side panels.

[0017] In some embodiments, the temperature and humidity control assembly includes a temperature controller, a humidity controller, a temperature sensor, and a humidity sensor, wherein the temperature controller, the humidity controller, the temperature sensor, and the humidity sensor are all fixed to the lower end surface of the top plate.

[0018] In some embodiments, the camera assembly includes a plurality of lower cameras and a plurality of upper cameras. The lower cameras are mounted below the simulated bearing via a lower bracket and are used to capture images of the lower portion of the simulated bearing. The upper cameras are mounted above the simulated bearing via an upper bracket and are used to capture images of the upper portion of the simulated bearing. The detection mechanism further includes a lifting drive, which is connected to the upper bracket and is used to control the lifting of the upper bracket.

[0019] In some embodiments, the outer ring of the simulated bearing has a plurality of first fixing screw holes, the mounting plate has a plurality of second fixing screw holes, and the main body of the simulation mechanism further includes a plurality of fixing screws, the fixing screws being threadedly connected to the first fixing screw holes and the second fixing screw holes, thereby achieving the fixing of the simulated bearing.

[0020] The present invention also provides a method for detecting the adhesion of bearing grease, applicable to the aforementioned bearing grease adhesion detection device, and comprising the following steps:

[0021] S1. By using the temperature and humidity control components of the environmental simulation chamber, the temperature and humidity inside the environmental simulation chamber are adjusted to the target value to provide controllable external conditions for detection.

[0022] S2. Fill the simulated bearing with the grease to be tested. Fix the outer ring of the simulated bearing to the mounting plate. Insert the shaft into the inner ring and connect it to the rotating drive component to ensure that the shaft can rotate with the drive component.

[0023] S3. The load loading mechanism applies axial and radial loads to the other end of the shaft to simulate the stress state of the bearing in actual operation. At the same time, the rotation drive starts, driving the shaft and the simulated bearing inner ring to rotate, forming relative motion between the inner and outer rings.

[0024] S4. Since the adhesion of grease affects the friction between the inner and outer rings, the torque detection component monitors the torque change between the mounting plate and the base plate in real time, indirectly reflecting the adhesion performance of the grease. At the same time, the camera of the detection mechanism continuously captures simulated bearing images of the transparent outer ring, recording the distribution of grease under rotation and load.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The temperature and humidity control component can reproduce the complex environment in actual use of bearings, and the test results are closer to the real working conditions. At the same time, it applies axial and radial loads and drives the shaft to rotate, simulating the combined stress state of the bearing during operation, avoiding test deviations under single load or no load conditions.

[0027] 2. The combination of torque detection and image observation not only quantifies the impact of adhesion on friction, but also visually displays the adhesion morphology of grease, improving the accuracy and reliability of the assessment.

[0028] 3. Transparent outer ring design: The dynamic changes of the lubricating grease can be observed in real time through the camera, and the test can be completed without disassembling the simulated bearing, which improves the testing efficiency and reduces wear. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the bearing grease adhesion testing device provided in one embodiment of this application;

[0030] Figure 2 yes Figure 1 A schematic diagram of the bearing grease adhesion testing device after omitting the cover and testing mechanism;

[0031] Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle;

[0032] Figure 4 yes Figure 2 A magnified view of a portion of region B in the middle;

[0033] Figure 5 yes Figure 2Sectional view of the middle section CC;

[0034] Figure 6 yes Figure 5 A magnified view of a portion of region D in the middle;

[0035] Figure 7 yes Figure 1 A three-dimensional structural diagram of the bearing grease adhesion testing device, omitting the cover and testing mechanism;

[0036] Figure 8 yes Figure 1 A schematic diagram of the structure of the cover and the detection mechanism in the middle;

[0037] Explanation of reference numerals in the attached drawings: 1. Environmental simulation chamber; 11. Base plate; 12. Cover; 121. Side plate; 122. Top plate; 13. Temperature and humidity control assembly; 131. Temperature controller; 132. Humidity controller; 133. Temperature sensor; 134. Humidity sensor; 2. Main body of the simulation mechanism; 21. Mounting plate; 211. Clearance hole; 212. Positioning groove; 22. Torque detection assembly; 221. Anti-rotation block; 222. Resistance detection pressure sensor; 23. Simulated bearing; 24. Shaft; 25. Rotation drive component; 251. Servo motor; 252. Coupling; 26. Fixing screw; 3. Loading... 31. Loading mechanism; 32. Fixed block; 33. Receiving groove; 34. Push plate; 35. Limiting groove; 36. Axial pushing assembly; 37. First screw; 38. Axial pressure sensor; 39. Turntable; 30. Ball bearing; 31. Slide groove; 32. Sliding block; 33. Connector; 34. Connecting block; 35. Bolt; 36. Radial pushing assembly; 37. Base block; 38. Second screw; 39. Radial pressure sensor; 40. Detection mechanism; 41. Camera assembly; 411. Lower camera; 412. Upper camera; 413. Lower bracket; 414. Upper bracket; 42. Lifting drive component. Detailed Implementation

[0038] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0039] This application mainly adopts a detection device and method that simulates dynamic working conditions and monitors the distribution of lubricating grease in real time, which achieves the effect of providing data support for lubricant selection and bearing design in complex environments. The following is a further detailed description of this application.

[0040] Please refer to Figures 1-8The bearing grease adhesion testing device provided in this application includes an environmental simulation chamber 1, a simulation mechanism body 2, a load loading mechanism 3, and a testing mechanism 4. The environmental simulation chamber 1 provides a simulated temperature and humidity environment for the simulation mechanism body 2, the load loading mechanism 3, and the testing mechanism 4. The simulation mechanism body 2 is used to simulate the actual rotation of the bearing. The load loading mechanism 3 applies axial and radial loads to the shaft 24 of the simulation mechanism body 2. The testing mechanism 4 obtains the distribution of grease in the simulated bearing 23. This achieves the beneficial effect of simulating dynamic working conditions and monitoring the distribution of lubricating oil in real time. This is because the environmental simulation chamber 1 simulates the actual temperature and humidity conditions, the load loading mechanism 3 applies the actual load, and the testing mechanism 4 obtains the distribution of grease in real time, making the test results closer to actual engineering applications.

[0041] Please refer to Figure 1 and Figure 8 The environmental simulation chamber 1 includes a base plate 11, a cover 12, and a temperature and humidity control component 13. The base plate 11 is the fundamental supporting component of the entire environmental simulation chamber 1; it is made of 304 stainless steel, which has good corrosion resistance and stability. The cover 12 is placed over the base plate 11, forming an environmental simulation cavity. The cover 12 includes four side plates 121 and a top plate 122. The four side plates 121 are fixed to the base plate 11, and the top plate 122 is fixed to the four side plates 121. Both the side plates 121 and the top plate 122 are made of transparent materials, such as tempered glass or acrylic sheets, allowing operators to easily observe the interior of the environmental simulation cavity from the outside. One side plate 121 is equipped with an openable or closable operating door for convenient installation, debugging, and maintenance of internal components.

[0042] Please refer to Figure 1 and Figure 8The temperature and humidity control component 13 includes a temperature controller 131, a humidity controller 132, a temperature sensor 133, and a humidity sensor 134, all of which are fixed to the lower end face of the top plate 122. The temperature sensor 133 and humidity sensor 134 monitor the temperature and humidity data within the environmental simulation chamber in real time and feed the data back to the temperature controller 131 and humidity controller 132. The temperature controller 131 and humidity controller 132 adjust the temperature and humidity within the environmental simulation chamber based on the feedback data to simulate different actual working conditions. This temperature and humidity control component 13 can simulate temperature and humidity environments of 10-95%RH and -10-80℃. The temperature sensor 133 has an accuracy of ±0.5℃, and the humidity sensor 134 has an accuracy of ±1%RH. The temperature controller 131 can use a PID controller, which has good control accuracy and stability; the humidity controller 132 uses ultrasonic atomization + heating evaporation to more accurately control humidity. The cabin is equipped with a rotating dynamic sealing hole (leakage rate ≤0.1%RH / h) and an anti-fog observation window (light transmittance ≥85%) to ensure the stability and observability of the simulated environment.

[0043] Please refer to Figures 1-7 The main body 2 of the simulation mechanism includes a mounting plate 21, a torque detection component 22, a simulated bearing 23, a shaft 24, and a rotation drive component 25. The mounting plate 21 is mounted above the base plate 11 via the torque detection component 22. The mounting plate 21 has a clearance hole 211 for the shaft 24 to pass through, and the shaft 24 is clearance-fitted with the clearance hole 211.

[0044] Please refer to Figures 1-7The torque detection component 22 includes an anti-rotation block 221 and two resistance detection pressure sensors 222. In this embodiment, there are two anti-rotation blocks 221 and two mounting plates 21. The anti-rotation block 221 is fixed to the base plate 11. The lower end of the mounting plate 21 has a positioning groove 212, and the anti-rotation block 221 is located in the positioning groove 212. The upper end surface of the anti-rotation block 221 is arc-shaped and makes line contact with the inner top surface of the positioning groove 212. This line contact method can both support the mounting plate 21 vertically and not hinder the rotation trend of the mounting plate 21. There is a gap between the lower end surface of the mounting plate 21 and the base plate 11, so that the presence of the base plate 11 will not hinder the rotation trend of the mounting plate 21, thus improving the accuracy of detection. The two resistance detection pressure sensors 222 are respectively fixed on both sides of the anti-rotation block 221 and abut against the two opposite inner sidewalls of the positioning groove 212. In use, when the shaft 24 rotates, it drives the outer ring of the simulated bearing 23 to rotate. The inner ring of the simulated bearing 23 is subjected to the force of the outer ring and also tends to rotate. This causes the mounting plate 21, which is fixedly connected to it, to tend to rotate around the shaft 24. However, due to the obstruction of the anti-rotation block 221, the mounting plate 21 cannot rotate. The tendency of the mounting plate 21 to rotate is converted into pressure on a certain resistance detection pressure sensor 222. By detecting the magnitude of the resistance detection pressure sensor 222, the strength of the rotation tendency of the mounting plate 21 can be determined. The strength of the rotation tendency of the mounting plate 21 is related to the friction between the inner and outer rings of the simulated bearing 23. The magnitude of the friction is related to the performance of the grease. Therefore, by detecting the magnitude of the resistance detection pressure sensor 222, the lubrication performance of the grease under actual working conditions can be determined.

[0045] Please refer to Figures 1-7 The simulated bearing 23 is filled with the grease to be tested. The outer ring of the simulated bearing 23 is made of transparent ceramic or polycarbonate with a light transmittance of ≥85%, which facilitates the observation of the distribution of the internal grease by the testing mechanism 4. The outer ring of the simulated bearing 23 has several first fixing screw holes, and the mounting plate 21 has several second fixing screw holes. The main body 2 of the simulation mechanism also includes several fixing screws 26, which are threadedly connected to both the first and second fixing screw holes, thereby fixing the simulated bearing 23. A shaft 24 is fixedly inserted into the inner ring of the simulated bearing 23. Specifically, the shaft 24 is keyed to the inner ring of the simulated bearing 23. The rotation drive 25 is connected to one end of the shaft 24 and is used to drive the shaft 24 to rotate. The rotation drive component 25 adopts a servo motor 251 with a speed range of 0-3000rpm and an accuracy of ±1rpm. The output shaft of the motor is connected to the shaft 24 through a coupling 252, which transmits power to the shaft 24, causing the shaft 24 to drive the simulated bearing 23 to rotate.

[0046] Please refer to Figures 1-7The load loading mechanism 3 includes a fixed block 31, a pusher 32, an axial pushing assembly 33, a turntable 34, a slider 35, a connector 36, and a radial pushing assembly 37. The fixed block 31 is fixed to the base plate 11, and a receiving groove 311 is formed in the fixed block 31. The pusher 32 is slidably disposed in the receiving groove 311 and can move axially along the shaft 24.

[0047] Please refer to Figures 1-6 The axial pushing assembly 33 includes several axial pushing components, each including a first screw 331 and an axial pressure sensor 332. A fixing block 31 has several first screw holes communicating with a receiving groove 311. The first screw 331 is threaded into the corresponding first screw hole. One end of the first screw 331 abuts against one end of the axial pressure sensor 332, and the other end of the axial pressure sensor 332 abuts against the push plate 32. By rotating the first screw 331, the pushing force of the axial pressure sensor 332 on the push plate 32 can be adjusted, thereby applying a preset axial load to the shaft 24. The axial load range is 0-50kN, with an accuracy of ±1%FS. A limiting groove 321 is formed on the push plate 32, and the axial pressure sensor 332 is disposed within the limiting groove 321, thereby preventing the axial pressure sensor 332 from disengaging from the push plate 32.

[0048] The turntable 34 and the push plate 32 are rotatably connected. Specifically, an annular groove is formed on the contact surface of the turntable 34 and the push plate 32, and several balls 341 are slidably disposed in the annular groove. This converts the rotational motion between the turntable 34 and the push plate 32 into the movement of the balls 341, reducing the frictional force during rotation between the turntable 34 and the push plate 32. Several sliding grooves 342 are formed on the turntable 34, extending radially along the turntable 34. The slider 35 is slidably disposed in the sliding groove 342. One end of the connecting member 36 is fixedly connected to the slider 35, and the other end of the connecting member 36 is fixedly connected to the other end of the shaft 24. The connecting member 36 includes a connecting block 361 and several bolts 362. The connecting block 361 is fixed to the other end of the shaft 24, and the connecting block 361 is fixedly connected to the slider 35 via the bolts 362. In this embodiment, there are three sliders 35 to increase stability.

[0049] Please refer to Figures 1-7The radial pushing assembly 37 includes several radial pushing components, each including a base block 371, a second screw 372, and a radial pressure sensor 373. The base block 371 is fixed within a slide groove 342, and a second screw hole is provided on the base block 371. The second screw 372 is threaded into the corresponding second screw hole. One end of the second screw 372 abuts against one end of the radial pressure sensor 373, and the other end of the radial pressure sensor 373 abuts against the slider 35. By rotating the second screw 372, the pushing force of the radial pressure sensor 373 on the slider 35 can be adjusted, thereby applying a preset radial load to the shaft 24. The radial load range is 0-50kN, with an accuracy of ±1%FS.

[0050] Please refer to Figure 1 and Figure 8 The detection mechanism 4 includes a camera assembly 41, which comprises several lower cameras 411 and several upper cameras 412. The lower cameras 411 are mounted below the simulated bearing 23 via a lower bracket 413 and are used to capture images of the lower portion of the simulated bearing 23. The upper cameras 412 are mounted above the simulated bearing 23 via an upper bracket 414 and are used to capture images of the upper portion of the simulated bearing 23. The detection mechanism 4 also includes a lifting drive 42, which is connected to the upper bracket 414 and is used to control the lifting and lowering of the upper bracket 414. When installing the simulated bearing 23, the upper bracket 414 can be raised to prevent the upper cameras 412 from obstructing operation. The lower camera 411 and the upper camera 412 use high-speed industrial cameras with a frame rate of ≥500fps and a resolution of 1280×1024. They are equipped with LED ring light sources (wavelength 532nm) and can clearly capture the dynamic distribution of grease in the simulated bearing 23, such as oil film thickness, coverage, and migration path.

[0051] The detection method steps include:

[0052] S1. Environmental Conditioning: The temperature and humidity inside the environmental simulation chamber are adjusted to the target value by the temperature and humidity control component 13 of the environmental simulation chamber 1, providing controllable external conditions for detection.

[0053] S2. Grease filling and installation: Fill the simulated bearing 23 with the grease to be tested. Fix the outer ring of the simulated bearing 23 to the mounting plate 21. Insert the shaft 24 into the inner ring and connect it to the rotation drive 25 to ensure that the shaft 24 can rotate with the rotation drive 25.

[0054] S3. Load application and rotation: The load loading mechanism 3 applies axial and radial loads to the other end of the shaft 24 to simulate the stress state of the bearing in actual operation; at the same time, the rotation drive 25 is started, driving the shaft 24 and the inner ring of the simulated bearing 23 to rotate, forming a relative motion between the inner and outer rings.

[0055] S4. Data Monitoring and Evaluation: Since the adhesion of the grease affects the friction between the inner and outer rings, the torque detection component 22 monitors the torque change between the mounting plate 21 and the base plate 11 in real time, indirectly reflecting the adhesion performance of the grease. Simultaneously, the camera component 41 of the detection mechanism 4 continuously captures images of the simulated bearing 23 with a transparent outer ring, recording the distribution of the grease under rotation and load (e.g., whether it adheres evenly, whether it leaks or accumulates), directly evaluating the adhesion effect. Based on the above key evaluation indicators, the detection data is analyzed to obtain the evaluation results of the lubricant adhesion.

[0056] This device uses multi-dimensional key evaluation indicators to assess the adhesion of lubricating oil:

[0057] Dynamic adhesion stability: This is reflected by calculating the torque growth ratio ΔT = (T1 - T0) / T0 × 100% (T1 is the operating resistance after 24 hours, and T0 is the initial resistance), which indicates the increase in frictional resistance caused by the decrease in lubricating oil adhesion. The smaller ΔT is, the more stable the adhesion. The operating resistance can be obtained through the resistance detection pressure sensor 222.

[0058] Lubricating oil coverage: Coverage C = (Lubricating oil coverage area / Effective area inside the bearing) × 100% (calculated through image recognition), which directly reflects whether the lubricating oil is lost due to centrifugal force, water scouring, etc. during dynamic operation. The slower C decreases, the better the adhesion.

[0059] Oil film thickness decay rate: Δh = (h0-h1) / h0×100% (h0 is the initial oil film thickness in the contact area, and h1 is the thickness after 24 hours). This rate assesses the oil film retention capability of the lubricating oil under high humidity and load conditions. The smaller the Δh, the stronger the resistance to water erosion and extrusion. Ink thickness can also be obtained through image analysis.

[0060] Failure Mode Localization: By playing back high-speed camera videos, we can determine the type of lubricant loss, including shedding loss (due to centrifugal force, the lubricant is thrown out from the bearing edge), emulsification loss (the lubricant mixes with water vapor and seeps out from the seal), and cohesive fracture (the lubricant breaks internally, resulting in localized oil shortage). This allows us to optimize the lubricant formulation in a targeted manner (such as adding thickeners to prevent shedding and improving demulsification).

[0061] In summary, the bearing grease adhesion testing device and method of this application can simulate dynamic working conditions and monitor the distribution of lubricating oil in real time, providing accurate data support for lubricating oil selection and bearing design in complex environments. Compared with the prior art, it overcomes the problems of unrealistic working condition simulation and lack of distribution monitoring, and improves the consistency between test results and engineering applications.

[0062] The technical effects of the technical solution provided in this application include:

[0063] (1) The temperature and humidity control component 13 can reproduce the complex environment in actual use of the bearing (such as high temperature and humidity industrial scene or low temperature and dry polar environment), and the test results are closer to the real working conditions. At the same time, axial and radial loads are applied and the shaft 24 is driven to rotate, simulating the composite force state of the bearing in operation, avoiding the test deviation under single load or no load conditions.

[0064] (2) The combination of torque detection (indirectly reflecting friction) and image observation (directly recording distribution state) not only quantifies the influence of adhesion on friction, but also intuitively shows the adhesion morphology of grease, thus improving the accuracy and reliability of the assessment.

[0065] (3) Transparent outer ring design: The dynamic changes of the lubricating grease can be observed in real time through the camera component 41. The test can be completed without disassembling the simulated bearing 23, which improves the test efficiency and reduces the wear.

[0066] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of this application.

Claims

1. A bearing grease adhesion testing device, characterized in that, include: An environmental simulation chamber (1) includes a base plate (11), a cover (12), and a temperature and humidity control component (13). The cover (12) is placed on the base plate (11), and an environmental simulation cavity is formed between the two. The temperature and humidity control component (13) is used to adjust the temperature and humidity inside the environmental simulation cavity. The main body (2) of the simulation mechanism includes a mounting plate (21), a torque detection component (22), a simulated bearing (23), a shaft (24), and a rotation drive component (25). The mounting plate (21) is mounted above the base plate (11) via the torque detection component (22). The torque detection component (22) is used to detect the torque between the mounting plate (21) and the base plate (11). The torque detection component (22) includes an anti-rotation block (221) and two resistance detection pressure sensors (222). The anti-rotation block (221) is fixed on the base plate (11). A positioning groove (212) is provided at the lower end of the mounting plate (21). The anti-rotation block (221) is located in the positioning groove. Inside the positioning groove (212), the upper end face of the anti-rotation block (221) is arc-shaped and in line contact with the inner top surface of the positioning groove (212). The two resistance detection pressure sensors (222) are respectively fixed on both sides of the anti-rotation block (221) and respectively abut against the two opposite inner sidewalls of the positioning groove (212). The simulated bearing (23) is filled with the grease to be tested. The outer ring of the simulated bearing (23) is made of transparent material and fixed to the mounting plate (21). The shaft (24) is fixedly inserted into the inner ring of the simulated bearing (23). The rotation drive (25) is connected to one end of the shaft (24) and is used to drive the shaft (24) to rotate. A load loading mechanism (3) is connected to the other end of the shaft (24) and is used to apply axial and radial loads to the shaft (24); The testing mechanism (4) includes a camera assembly (41) for acquiring images of the simulated bearing (23) to obtain the distribution of grease within the simulated bearing (23).

2. The bearing grease adhesion testing device according to claim 1, characterized in that, The load loading mechanism (3) includes a fixed block (31), a push plate (32), an axial pushing assembly (33), a turntable (34), a slider (35), a connector (36), and a radial pushing assembly (37). The fixed block (31) is fixed to the base plate (11), and a receiving groove (311) is formed in the fixed block (31). The push plate (32) is slidably disposed in the receiving groove (311) and can move axially along the shaft (24). The axial pushing assembly (33) is connected to both the fixed block (31) and the push plate (32) and is used to push the load onto the base plate. The push plate (32) applies a preset thrust, the turntable (34) is rotatably connected to the push plate (32), the turntable (34) is provided with a plurality of sliding grooves (342), the sliding grooves (342) extend radially along the turntable (34), the slider (35) is slidably disposed in the sliding grooves (342), one end of the connector (36) is fixedly connected to the slider (35), the other end of the connector (36) is fixedly connected to the other end of the shaft (24), and the radial pushing assembly (37) is used to apply a radial thrust to the slider (35).

3. The bearing grease adhesion testing device according to claim 2, characterized in that, The fixing block (31) has a plurality of first screw holes communicating with the receiving groove (311). The axial pushing assembly (33) includes a plurality of axial pushing members. The axial pushing members include a first screw (331) and an axial pressure sensor (332). The first screw (331) is threaded into the corresponding first screw hole. One end of the first screw (331) abuts against one end of the axial pressure sensor (332), and the other end of the axial pressure sensor (332) abuts against the push plate (32).

4. The bearing grease adhesion testing device according to claim 2, characterized in that, The radial pushing assembly (37) includes several radial pushing members, each including a base block (371), a second screw (372), and a radial pressure sensor (373). The base block (371) is fixed in the slide groove (342), and a second screw hole is provided on the base block (371). The second screw (372) is threaded into the corresponding second screw hole. One end of the second screw (372) abuts against one end of the radial pressure sensor (373), and the other end of the radial pressure sensor (373) abuts against the slider (35).

5. The bearing grease adhesion testing device according to claim 1, characterized in that, The cover (12) includes four side plates (121) and a top plate (122). The four side plates (121) are respectively fixed on the bottom plate (11), and the top plate (122) is fixed on the four side plates (121).

6. The bearing grease adhesion testing device according to claim 5, characterized in that, The temperature and humidity control component (13) includes a temperature controller (131), a humidity controller (132), a temperature sensor (133), and a humidity sensor (134). The temperature controller (131), the humidity controller (132), the temperature sensor (133), and the humidity sensor (134) are all fixed to the lower end face of the top plate (122).

7. The bearing grease adhesion testing device according to claim 1, characterized in that, The camera assembly (41) includes several lower cameras (411) and several upper cameras (412). The lower cameras (411) are mounted below the simulated bearing (23) via a lower bracket (413) and are used to capture images of the lower part of the simulated bearing (23). The upper cameras (412) are mounted above the simulated bearing (23) via an upper bracket (414) and are used to capture images of the upper part of the simulated bearing (23). The detection mechanism (4) also includes a lifting drive (42), which is connected to the upper bracket (414) and is used to control the lifting of the upper bracket (414).

8. The bearing grease adhesion testing device according to claim 1, characterized in that, The outer ring of the simulated bearing (23) is provided with a number of first fixing screw holes, and the mounting plate (21) is provided with a number of second fixing screw holes. The main body (2) of the simulation mechanism also includes a number of fixing screws (26). The fixing screws (26) are threadedly connected to the first fixing screw holes and the second fixing screw holes, thereby realizing the fixing of the simulated bearing (23).

9. A method for testing the adhesion of bearing grease, characterized in that, The bearing grease adhesion testing device as described in any one of claims 1-8, and includes the following steps: S1. By using the temperature and humidity control component (13) of the environmental simulation chamber (1), the temperature and humidity inside the environmental simulation chamber are adjusted to the target value to provide controllable external conditions for detection. S2. Fill the simulated bearing (23) with the grease to be tested. The outer ring of the simulated bearing (23) is fixed to the mounting plate (21). The shaft (24) is inserted into the inner ring and connected to the rotating drive (25) to ensure that the shaft (24) can rotate with the drive. S3. The load loading mechanism (3) applies axial and radial loads to the other end of the shaft (24) to simulate the stress state of the bearing (23) in actual operation. At the same time, the rotation drive (25) starts, driving the shaft (24) and the inner ring of the simulated bearing (23) to rotate, forming a relative motion between the inner and outer rings. S4. Since the adhesion of grease will affect the friction between the inner and outer rings, the torque detection component (22) monitors the torque change between the mounting plate (21) and the base plate (11) in real time, which indirectly reflects the adhesion performance of grease. At the same time, the camera of the detection mechanism (4) continuously captures images of the simulated bearing (23) with the transparent outer ring, and records the distribution state of grease under rotation and load.

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