Comprehensive test equipment for belt wheel bearing of engine

Abstract

An engine belt wheel bearing comprehensive test device disclosed by the present invention comprises a test bed and a rack, the rack is provided with a tool plate and a fixed plate, the tool plate is movably provided with a flat belt, a main belt wheel set and an auxiliary belt wheel set, the fixed plate is rotatably provided with a main shaft belt wheel, and the main shaft belt wheel, the main belt wheel set and the auxiliary belt wheel set are in transmission connection through the flat belt. A tested bearing is installed on the main belt wheel set, an accompanying bearing is installed on the auxiliary belt wheel set, and the rack is provided with a vibration loading structure used for applying vibration acting force to the tool plate to simulate the working condition of the vibration environment where the tested bearing is located in the actual operation process and a radial loading structure used for applying radial loads to the tested bearing. The test bench is provided with a driving assembly used for driving the main shaft belt wheel to operate so as to simulate the actual operation condition of the tested bearing. The problem that a traditional belt wheel bearing test tool is difficult to integrate, regulate and control key influence factors such as slipping, static electricity, impact vibration and loads and carry out corresponding simulation tests on bearings is solved.

Description

Technical Field

[0001] This invention relates to the field of bearing testing equipment technology, specifically to a comprehensive testing device for engine pulley bearings. Background Technology

[0002] In fields such as wind power generation, automobiles, and high-end equipment manufacturing, the reliable operation of bearings used in generators, tensioners, wind turbine gearboxes, and electrical components directly determines the safety and service life of the entire machine. In recent years, a microscopic failure phenomenon called "white structure spalling" has been frequently discovered in bearing failure analyses in these fields: bearing cracks and spalling areas are accompanied by the formation of white plastic material. This phenomenon significantly shortens the service life of bearings and can even lead to serious consequences such as equipment downtime and safety accidents, thus becoming a key research direction for industry and universities.

[0003] Existing testing equipment cannot meet the research requirements for white structure spalling in generator pulley radial roller bearings. Firstly, existing equipment is mostly designed for thrust bearings and cannot simulate the actual operating environment of deep groove ball bearings (especially under pulley conditions), making it difficult to reproduce the electrostatic effect caused by slippage between the pulley and belt, and the slippage friction effect between the rollers and inner and outer rings of the bearing due to acceleration / rapid deceleration. Secondly, existing equipment often uses electric vibrators or centrifugal vibrating motors to provide vibration. Such devices have electromagnetic leakage problems, which can interfere with the electrostatic and current-sensitive test process, leading to distorted test data. Thirdly, the transmission and loading structures of existing equipment are complex (such as requiring additional tensioning pulleys), which can easily introduce additional interference factors, affecting the accurate reproduction and mechanism analysis of the white structure spalling phenomenon. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a comprehensive testing device for engine pulley bearings. This device solves the problem that traditional pulley bearing testing fixtures are unable to integrate and control key influencing factors such as slippage, static electricity, impact vibration, and load, and to conduct corresponding simulation tests on the bearings.

[0005] To achieve the above objectives, the present invention provides a comprehensive testing device for engine pulley bearings, comprising a test bench and a frame erected on the test bench. The frame is provided with a tooling plate and a fixed plate. A flat belt, a main pulley assembly, and a secondary pulley assembly are movably arranged on the tooling plate. A main shaft pulley is rotatably arranged on the fixed plate. The main shaft pulley, the main pulley assembly, and the secondary pulley assembly are connected by a flat belt drive to simulate the slippage and electrostatic conditions that occur during the actual operation of the bearing under test. The bearing under test is mounted on the main pulley assembly, and a test bearing is mounted on the secondary pulley assembly. The frame is provided with a vibration loading structure for applying vibrational force to the tooling plate to simulate the vibrational environment conditions of the bearing under test during actual operation, and a radial loading structure for applying radial load to the bearing under test. The test bench is provided with a drive assembly for driving the main shaft pulley to rotate to simulate the actual operating conditions of the bearing under test.

[0006] The advantages of adopting the above technical solution are as follows: In the above structure, the main pulley group is used to install the bearing under test, and the auxiliary pulley group is used to install the bearing under test. This clearly distinguishes the test object from the auxiliary components, ensuring that the test focuses on the bearing under test. At the same time, the main shaft pulley, the main pulley group, and the auxiliary pulley group are connected by a flat belt drive. The flat belt is preferably a flat belt that is prone to slippage. This setting takes into account the electrostatic effect of friction and slippage between the printed pulley and the flat belt in the prior art, and can accurately simulate the slippage and electrostatic conditions of the bearing under test during actual operation, avoiding the problem that a single transmission structure cannot reproduce the key failure causes. The drive component drives the main shaft pulley to rotate, which can simulate the actual operating speed and other conditions of the bearing under test, providing basic operating conditions for the test. The vibration loading structure applies vibration force to the tooling plate, which can reproduce the actual vibration environment of the bearing under test. The radial loading structure applies radial load to the bearing under test, which can simulate the actual stress conditions. The combination of the two realizes multi-condition integrated simulation, eliminating the need for separate tests with multiple devices, improving test efficiency and relevance, and providing comprehensive working condition support for the study of the peeling of the white structure of the bearing under test.

[0007] The present invention further comprises: a transmission plate movably disposed below the tooling plate; the transmission plate and the tooling plate being linked and cooperated to drive the tooling plate to move synchronously when the transmission plate moves; the radial loading structure includes a loading cylinder, a pulley, and a transmission cable; the transmission cable is wound around the pulley and is slidably cooperated with the pulley; the beginning of the transmission cable is connected to the loading cylinder; the end of the transmission cable is linked and cooperated with the transmission plate; the loading cylinder is disposed on the test bench; when the loading cylinder is running, it drives the transmission plate to move through the transmission cable.

[0008] The advantages of adopting the above technical solution are as follows: The transmission plate below the tooling plate in the above technology works in conjunction with the tooling plate, allowing the force of the radial loading structure to be evenly transmitted to the tooling plate, avoiding localized stress concentration caused by direct loading and protecting the structural stability of the tooling plate. Furthermore, in the radial loading structure, the transmission cable is wound around pulleys and has a sliding fit, which reduces the resistance of the cable transmission, improves the efficiency of loading force transmission, and the pulleys can change the direction of force transmission, optimizing the layout of the loading structure on the test bench and saving equipment space. The loading cylinder is set on the test bench and drives the transmission plate through the transmission cable, enabling stable output of the loading force and precise control of the radial load on the tested bearing, avoiding loading impact interference with the test, ensuring smooth application of the radial load, and thus improving the accuracy of the test data.

[0009] The present invention further comprises: two guide shafts arranged opposite each other on the outer wall of the frame; guide blocks are provided on the tooling plate at the positions corresponding to the two guide shafts; a first through hole is provided on the guide block for the guide shaft to pass through; the guide block is movably disposed on the guide shaft along the axial direction of the guide shaft; a second through hole is provided on the transmission plate for the guide shaft to pass through; and a damping spring is connected between the two guide blocks and the transmission plate; the damping spring is sleeved on the guide shaft.

[0010] The advantages of adopting the above technical solution are as follows: In the above technology, the two guide shafts on the outer wall of the test bench cooperate with the first through hole of the guide block on the tooling plate, which can provide precise guidance for the movement of the tooling plate, prevent the tooling plate from deviating, and ensure the stability of the transmission position of the main and auxiliary pulley groups; while the guide shaft cooperates with the second through hole of the transmission plate, which can further constrain the movement direction of the transmission plate, ensure that the transmission plate and the tooling plate move synchronously, and avoid the displacement deviation between the two affecting the load transmission; at the same time, the damping spring between the guide block and the transmission plate is sleeved on the guide shaft, which can buffer the impact force during loading and vibration, reduce rigid collisions between structures, protect the tooling plate, transmission plate and guide shaft, extend the service life of the equipment, and thus reduce the impact of vibration on the stability of the load, and ensure the stability of the test conditions parameters.

[0011] The present invention further includes: a force sensor movably mounted on the platform; the force sensor is connected to the end of the transmission cable by a hinge bolt; and the force sensor is connected to the transmission plate.

[0012] The advantages of adopting the above technical solution are as follows: The force sensor on the test bench can monitor the load force transmitted by the transmission cable in real time, facilitating accurate control of radial load parameters by test personnel, ensuring the load meets the test requirements, and improving the accuracy and traceability of test data. The hinged bolt connecting the force sensor to the end of the transmission cable eliminates lateral forces generated during transmission, preventing lateral forces from interfering with the force sensor's monitoring accuracy, and reducing damage to the transmission cable and transmission plate from lateral forces, ensuring accurate force transmission direction. Simultaneously, the force sensor's connection to the transmission plate allows direct sensing of the load on the transmission plate, improving the real-time performance of load monitoring and providing a reliable basis for dynamic control during the test process. The force sensor in the above technology is existing technology; therefore, its structure and function will not be described in detail further.

[0013] The present invention further includes: the vibration structure including at least one vibration generator disposed on the top of the tooling plate, the output end of the vibration generator being connected to a vibration connector, the vibration connector being detachably connected to the tooling plate, and the vibration generator being a pneumatic vibrator.

[0014] The advantages of adopting the above technical solution are: at least one vibration generator in the vibration structure is set on the top of the tooling plate, and the number of vibration generators can be adjusted according to the test requirements to realize the simulation of different vibration intensities and frequencies, adapting to various test conditions; the vibration connector at the output end of the vibration generator is detachably connected to the tooling plate, which facilitates the installation, disassembly and maintenance of the vibration generator and reduces the difficulty of equipment maintenance; the vibration generator adopts a pneumatic vibrator, which can effectively avoid electromagnetic leakage generated during the operation of electric or centrifugal vibration motors, eliminate electromagnetic interference on the electrostatic condition simulation in the test, ensure the accuracy of electrostatic condition parameters, and at the same time, the pneumatic vibrator can stably output low-frequency high-impact vibration, accurately reproduce the vibration environment of the tested bearing in actual operation, and improve the realism of the test condition simulation.

[0015] The invention further includes the following feature: the tooling plate is made of high-strength aluminum-magnesium alloy.

[0016] The advantages of adopting the above technical solution are: the tooling plate is made of high-strength aluminum-magnesium alloy, which has high structural strength and can withstand the forces generated by vibration and load during the test, avoiding deformation or damage to the tooling plate, ensuring the structural stability of the tooling plate, thereby ensuring the fixed installation position of the main and auxiliary pulley groups, reducing the interference of structural deformation on the test, and at the same time, the material is relatively light, which can increase the maximum value of the impact vibration acceleration of the tooling plate, making the tooling plate more responsive to the vibration output of the vibration generator, accurately transmitting the vibration conditions, and avoiding vibration transmission lag due to excessive tooling plate mass.

[0017] The present invention further comprises: a positioning spindle detachably connected to the fixing plate; a spindle pulley rotatably mounted on the positioning spindle and a spindle bearing connected between the spindle pulley and the positioning spindle; the spindle pulley and the positioning spindle being coaxially arranged; a circumferential groove for partial accommodating a flat belt being provided on the outer peripheral wall of the spindle; and the spindle pulley being a composite transmission wheel.

[0018] The advantages of adopting the above technical solution are: the fixed plate and the positioning spindle are detachably connected, which facilitates the installation, replacement and maintenance of the positioning spindle, spindle pulley and spindle bearing, adapts to the test requirements of different specifications of spindle pulleys, and improves the versatility of the equipment; the spindle pulley is rotatably mounted on the positioning spindle and the two are coaxial, which, together with the spindle bearing, ensures the coaxiality of the spindle pulley during rotation, reduces the impact of rotational eccentricity on transmission accuracy, ensures the stability of the flat belt transmission, and avoids deviations in the simulation of slippage caused by eccentricity; the groove on the outer circumference of the spindle pulley can limit the flat belt, prevent the flat belt from falling off during transmission, and ensure the continuity of transmission; at the same time, the spindle pulley adopts a composite transmission wheel structure, which can reduce rotational inertia, adapt to the high speed and rapid speed change requirements of the tested bearing in actual operation, reduce the interference of inertia on the simulation of test conditions, and improve the realism of the test.

[0019] The present invention further comprises: the driving structure includes a drive motor, and a multi-wedge belt is belt-driven between the output end of the drive motor and the main shaft pulley, and a wedge-shaped groove for cooperating with the multi-wedge belt is provided on the outer peripheral wall of the main shaft pulley.

[0020] The advantages of adopting the above technical solution are: the drive motor is connected to the main shaft pulley via a multi-ribbed belt, which has high transmission efficiency and can accurately transmit the power of the drive motor, ensuring that the speed of the main shaft pulley meets the test setting requirements, avoiding speed deviation caused by low transmission efficiency, and ensuring accurate simulation of the operating conditions of the tested bearing. At the same time, the wedge-shaped groove on the outer circumference of the main shaft pulley cooperates with the multi-ribbed belt to increase the contact area between the two, improve transmission stability, prevent slippage during transmission, ensure continuous power transmission, and the multi-ribbed belt drive can buffer the impact when the drive motor starts and stops, reduce damage to the main shaft pulley and related components, and extend the service life of the equipment.

[0021] The present invention further includes: an adjustment plate and a support plate arranged on the test bench corresponding to the position of the drive motor; two transmission screws arranged opposite to each other on the support plate; the starting end of the transmission screw is rotatably mounted on the support plate and the end of the transmission screw is threadedly connected to the adjustment plate; two adjustment slots are arranged opposite to each other on the adjustment plate; a locking bolt is detachably connected between the housing of the drive motor and the adjustment slots; and the adjustment slots are arranged perpendicularly to the transmission screws.

[0022] The advantages of adopting the above technical solution are as follows: The two transmission screws on the support plate of the test bench have one end rotatably mounted on the support plate and the other end threadedly connected to the adjustment plate. This allows adjustment of the horizontal position of the adjustment plate, as well as its horizontal tilt angle, ensuring the horizontal installation accuracy of the drive motor and avoiding transmission deviation caused by motor tilt. The two adjustment slots on the adjustment plate are perpendicular to the transmission screws and connected to the drive motor housing via locking bolts. This allows adjustment of the vertical position of the drive motor, achieving multi-dimensional adjustment of the drive motor position. This ensures that the output end of the drive motor is aligned with the transmission center of the main shaft pulley, improving the accuracy and stability of the multi-ribbed belt transmission and preventing transmission deviation from interfering with the test conditions. The multi-dimensional adjustment structure adapts to the installation requirements of different drive motor specifications, improving the equipment's versatility and facilitating adjustments to drive parameters during testing.

[0023] The present invention further comprises: the main pulley assembly including at least one test shaft and a test pulley rotatably mounted on the test shaft; a first retaining edge is circumferentially provided on the outer peripheral wall of the test shaft; the test shaft is fixed to a tooling plate, and a test cavity for the installation and operation of the test bearing is formed between the outer peripheral wall of the test shaft and the inner peripheral wall of the test pulley; a locking nut for cooperating with the first retaining edge to clamp and fix the inner ring of the test bearing is threaded onto the test shaft; the auxiliary pulley assembly includes at least one auxiliary test shaft and an auxiliary test pulley rotatably mounted on the auxiliary test shaft; a second retaining edge is circumferentially provided on the outer peripheral wall of the auxiliary test shaft; the auxiliary test shaft is fixed to a tooling plate, and a test cavity for the installation and operation of the auxiliary test bearing is formed between the outer peripheral wall of the auxiliary test shaft and the inner peripheral wall of the auxiliary test pulley; a retaining ring for cooperating with the second retaining edge to clamp and fix the inner ring of the auxiliary test bearing is detachably connected to the auxiliary test shaft.

[0024] The advantages of adopting the above technical solution are as follows: In the main pulley assembly, the first flange of the test shaft, in conjunction with the locking bolt, can firmly clamp and fix the inner ring of the tested bearing, preventing loosening or displacement during the test, ensuring stable operation of the tested bearing, and improving the accuracy of test data. The test cavity between the test shaft and the test pulley provides a dedicated installation space for the tested bearing, ensuring precise installation. In the auxiliary pulley assembly, the second flange of the auxiliary shaft, in conjunction with the retaining ring, can firmly fix the inner ring of the auxiliary bearing, ensuring stable rotation of the auxiliary pulley and providing stable support for the flat belt drive. The test cavity between the auxiliary shaft and the auxiliary pulley ensures precise installation of the auxiliary bearing. Both the main and auxiliary pulley assemblies are fixed to the tooling plate, ensuring stable relative positions and improving the stability of the flat belt drive. The retaining ring is removable, facilitating the replacement of the auxiliary bearing and adapting to different test requirements. The overall structure simplifies the installation and fixing process of the tested and auxiliary bearings, reducing the interference of installation errors on the test. The tested pulley, auxiliary pulley, and main shaft pulley are connected and configured via a flat belt drive. Attached Figure Description

[0025] Figure 1 This is a frontal three-dimensional view of the present invention; Figure 2 This is a three-dimensional view of the rear side of the present invention; Figure 3 This is a partial three-dimensional view of the present invention; Figure 4 This is a cross-sectional view of the fixed plate and the main shaft pulley in the cooperation state in this invention; Figure 5 This is a cross-sectional view of the adjustment plate and its linkage components in the present invention in a coordinated state. Figure 6 This is a cross-sectional view of the test pulley and its linkage components in this invention; Figure 7 This is a cross-sectional view of the test pulley and its linkage components in this invention. Detailed Implementation

[0026] This invention provides a comprehensive testing device for engine pulley bearings, including a test bench 1 and a frame 11 erected on the test bench 1. The frame 11 is provided with a tooling plate 2 and a fixed plate 3. A flat belt 12, a main pulley group, and a secondary pulley group are movably mounted on the tooling plate 2. A main shaft pulley 31 is rotatably mounted on the fixed plate 3. The main shaft pulley 31, the main pulley group, and the secondary pulley group are connected by the flat belt 12 to simulate the slippage and electrostatic conditions that occur during the actual operation of the tested bearing 13. The tested bearing 13 is mounted on the main pulley group, and a secondary bearing 14 is mounted on the secondary pulley group. The frame 11 is provided with a vibration device for applying vibration force to the tooling plate 2 to simulate the vibration environment conditions of the tested bearing 13 during actual operation. The test bench 1 includes a dynamic loading structure and a radial loading structure for applying radial load to the test bearing 13. The test bench 1 is equipped with a drive assembly for driving the spindle pulley 31 to simulate the actual operating conditions of the test bearing 13. A transmission plate 4 is movably mounted below the tooling plate 2. The transmission plate 4 is linked to the tooling plate 2 so that it moves synchronously with the tooling plate 2 when the transmission plate 4 moves. The radial loading structure includes a loading cylinder 41, a pulley 42, and a transmission cable 43. The transmission cable 43 is wound around the pulley 42 and slidably engaged with it. The beginning of the transmission cable 43 is connected to the loading cylinder 41, and the end of the transmission cable 43 is linked to the transmission plate 4. The loading cylinder 41 is mounted on the test bench 1. When the cylinder 41 operates, it drives the transmission plate 4 to move via the transmission cable 43. Two guide shafts 21 are oppositely arranged on the outer wall of the frame 11. Guide blocks 22 are provided on the tooling plate 2 at positions corresponding to the two guide shafts 21. Each guide block 22 has a first through hole for the guide shaft 21 to pass through. The guide block 22 is movably mounted on the guide shaft 21 along its axial direction. The transmission plate 4 has a second through hole for the guide shaft 21 to pass through. A damping spring 23 connects each guide block 22 to the transmission plate 4. The damping spring 23 is sleeved on the guide shaft 21. A force sensor 44 is movably mounted on the frame 11. The force sensor 44 is connected to the end of the transmission cable 43 by a hinged bolt 441. Force sensor 44 is connected to transmission plate 4. The vibration structure includes at least one vibration generator 24 disposed on the top of tooling plate 2. The output end of vibration generator 24 is connected to vibration connector 241. Vibration connector 241 is detachably connected to tooling plate 2. Vibration generator 24 is a pneumatic vibrator. Tooling plate 2 is made of high-strength aluminum-magnesium alloy. Positioning spindle 32 is detachably connected to fixed plate 3. Spindle pulley 31 is rotatably disposed on positioning spindle 32, and spindle bearing 321 is connected between spindle pulley 31 and positioning spindle 32. Spindle pulley 31 and positioning spindle 32 are coaxially disposed. A receiving groove 33 is circumferentially opened on the outer peripheral wall of spindle pulley 31 for partial accommodation of flat belt 12.The main shaft pulley 31 is a composite transmission pulley. The drive structure includes a drive motor 5. A multi-wedge belt 51 is belt-driven between the output end of the drive motor 5 and the main shaft pulley 31. A wedge-shaped groove 34 for cooperating with the multi-wedge belt 51 is formed on the outer peripheral wall of the main shaft pulley 31. An adjusting plate 52 and a support plate 53 are arranged on the test bench 1 corresponding to the position of the drive motor 5. Two transmission screws 531 are arranged opposite to each other on the support plate 53. The starting end of the transmission screw 531 is rotatably set on the support plate 53, and the end of the transmission screw 531 is threadedly connected to the adjusting plate 52. Two adjusting grooves 521 are arranged opposite to each other on the adjusting plate 52. A locking bolt is detachably connected between the housing of the drive motor 5 and the adjusting grooves 521. The adjusting grooves 521 are arranged perpendicularly to the transmission screws 531. The main pulley assembly includes at least one test shaft 6 and a rotatably set on the test shaft. The test pulley 61 on the test shaft 6 has a first retaining edge 62 circumferentially formed on its outer peripheral wall. The test shaft 6 is fixed to the tooling plate 2, and a test cavity for the installation and operation of the test bearing 13 is formed between the outer peripheral wall of the test shaft 6 and the inner peripheral wall of the test pulley 61. A locking nut 63 is threadedly connected to the test shaft 6 to cooperate with the first retaining edge 62 to clamp and fix the inner ring of the test bearing 13. The auxiliary pulley group includes at least one auxiliary test shaft 7 and an auxiliary test pulley 71 rotatably disposed on the auxiliary test shaft 7. A second retaining edge 73 is circumferentially formed on the outer peripheral wall of the auxiliary test shaft 7. The auxiliary test shaft 7 is fixed to the tooling plate 2, and a test cavity for the installation and operation of the auxiliary test bearing 14 is formed between the outer peripheral wall of the auxiliary test shaft 7 and the inner peripheral wall of the auxiliary test pulley 71. A retaining ring 74 is detachably connected to the auxiliary test shaft 7 to cooperate with the second retaining edge 73 to clamp and fix the inner ring of the auxiliary test bearing 14.

[0027] The overall operation process of the above-mentioned engine pulley bearing integrated testing equipment is as follows: 1. Equipment Initialization and Component Installation and Debugging: Complete the basic assembly of the test bench and the frame erected on it. First, detachably install the positioning spindle on the fixed plate. Rotate the spindle pulley onto the positioning spindle via the spindle bearing (ensuring coaxiality), so that the outer circumferential groove of the spindle pulley matches the flat belt. Then, fix the test shaft of the main pulley group and the auxiliary test shaft of the auxiliary pulley group on the tooling plate. Install the bearing to be tested into the test cavity between the test shaft and the test pulley. Clamp and fix the inner ring of the bearing to be tested by the first flange of the test shaft and the threaded lock nut. The test bearing is installed in the test cavity between the test shaft and the test pulley. The inner ring of the test bearing is clamped and fixed by the second flange of the test shaft and the detachable retaining ring. Then, the adjustment plate and the support plate are installed at the corresponding positions on the test bench. The two transmission screws on the support plate are rotated to adjust the horizontal position of the adjustment plate. The drive motor is fixed by the adjustment groove on the adjustment plate (perpendicular to the transmission screws) and the locking bolts to ensure that the output end of the drive motor is accurately aligned with the multi-wedge belt drive of the main shaft pulley. Finally, the flat belt is assembled on the main shaft pulley, the main pulley group and the auxiliary pulley group to complete the transmission pre-assembly.

[0028] 2. Transmission System Start-up and Basic Operating Condition Establishment: Start the drive motor of the drive assembly. The motor output drives the main shaft pulley to rotate around the positioning main shaft through a multi-wedge belt (which mates with the wedge groove on the outer circumference of the main shaft pulley). The main shaft pulley drives the main pulley group and the auxiliary pulley group to rotate synchronously through a flat belt (partially housed in the main shaft pulley groove). This causes the test bearing on the main pulley group and the accompanying test bearing on the auxiliary pulley group to rotate synchronously with the pulleys. The flat belt transmission characteristics are used to simulate the slippage condition and the accompanying electrostatic condition of the test bearing during actual operation. At the same time, the different actual operating speed conditions of the test bearing are reproduced by adjusting the speed of the drive motor.

[0029] 3. Vibration and Radial Loading: Activate the pneumatic vibration generator of the vibration loading structure (select one or more according to test requirements). The vibration generator transmits the vibration force to the fixture plate (made of high-strength aluminum-magnesium alloy to ensure stable vibration transmission) through a detachable vibration connector, simulating the vibration environment conditions of the tested bearing during actual operation. Simultaneously, activate the loading cylinder of the radial loading structure. The loading cylinder transmits the force through a transmission cable (with pulleys around it and sliding fit, the pulleys changing the direction of force transmission). That is, the loading cylinder pulls the transmission cable, causing the end of the transmission cable to pull the transmission plate upward, which in turn drives the fixture plate to move upward. When the fixture plate moves, the flat belt is affected by the positional limitations of the test pulley, main shaft pulley, and auxiliary pulley, causing the flat belt to generate a reverse force, that is, to apply a radial load to the tested bearing through the flat belt, thus simulating the load conditions experienced by the bearing during actual operation. During the above process, a damping spring sleeved between the guide block and the transmission plate on the guide shaft buffers the impact generated by loading and vibration, ensuring smooth load and vibration transmission.

[0030] 4. Monitoring and Control of the Test Process: During the test, the force sensor on the test bench monitors the radial load transmitted by the transmission cable in real time, which allows for adjustment of the load magnitude by adjusting the output pressure of the loading cylinder according to the test requirements; by adjusting the operating parameters of the pneumatic vibration generator, the vibration intensity and frequency of the tooling plate are changed to adapt to the simulation requirements of different vibration environments; by adjusting the speed of the drive motor, the actual operating conditions such as acceleration and deceleration of the tested bearing are simulated, and the guiding effect of the guide shaft on the tooling plate and transmission plate is used to avoid component displacement from affecting the test accuracy, and to ensure that the parameters of each operating condition are stable and meet the test settings.

[0031] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A comprehensive testing device for engine pulley bearings, characterized in that: The test includes a test bench and a frame erected on the test bench. The frame is equipped with a tooling plate and a fixed plate. A flat belt, a main pulley assembly, and a secondary pulley assembly are movably mounted on the tooling plate. A main shaft pulley is rotatably mounted on the fixed plate. The main shaft pulley, main pulley assembly, and secondary pulley assembly are connected by a flat belt drive to simulate slippage and electrostatic conditions encountered during the actual operation of the bearing under test. The bearing under test is mounted on the main pulley assembly, and a test bearing is mounted on the secondary pulley assembly. The frame is equipped with a vibration loading structure for applying vibrational force to the tooling plate to simulate the vibrational environment conditions encountered during the actual operation of the bearing under test, and a radial loading structure for applying radial load to the bearing under test. The test bench is equipped with a drive assembly for driving the main shaft pulley to simulate the actual operating conditions of the bearing under test.

2. The comprehensive testing equipment for engine pulley bearings according to claim 1, characterized in that: A transmission plate is movably disposed below the tooling plate. The transmission plate is linked with the tooling plate to drive the tooling plate to move synchronously when the transmission plate moves. The radial loading structure includes a loading cylinder, a pulley, and a transmission cable. The transmission cable is wound around the pulley and is slidably coupled with the pulley. The beginning of the transmission cable is connected to the loading cylinder, and the end of the transmission cable is linked with the transmission plate. The loading cylinder is disposed on the test bench. When the loading cylinder is running, it drives the transmission plate to move through the transmission cable.

3. The comprehensive testing equipment for engine pulley bearings according to claim 2, characterized in that: Two guide shafts are arranged opposite each other on the outer wall of the frame. Guide blocks are provided on the tooling plate at the positions corresponding to the two guide shafts. A first through hole is opened on the guide block for the guide shaft to pass through. The guide block is movably arranged on the guide shaft along the axis of the guide shaft. A second through hole is opened on the transmission plate for the guide shaft to pass through. A damping spring is connected between the two guide blocks and the transmission plate. The damping spring is sleeved on the guide shaft.

4. The comprehensive testing equipment for engine pulley bearings according to claim 3, characterized in that: A force sensor is movably mounted on the platform. The force sensor is connected to the end of the transmission cable by a hinge bolt. The force sensor is also connected to the transmission plate.

5. The comprehensive testing equipment for engine pulley bearings according to claim 1, characterized in that: The vibration structure includes at least one vibration generator disposed on the top of the tooling plate. The output end of the vibration generator is connected to a vibration connector. The vibration connector is detachably connected to the tooling plate. The vibration generator is a pneumatic vibrator.

6. The comprehensive testing equipment for engine pulley bearings according to claim 5, characterized in that: The tooling plate is made of high-strength aluminum-magnesium alloy.

7. The comprehensive testing equipment for engine pulley bearings according to claim 1, characterized in that: A positioning spindle is detachably connected to the fixed plate. The spindle pulley is rotatably mounted on the positioning spindle, and a spindle bearing is connected between the spindle pulley and the positioning spindle. The spindle pulley is coaxial with the positioning spindle. A groove is provided circumferentially on the outer peripheral wall of the spindle for partial accommodating the flat belt. The spindle pulley is a composite transmission wheel.

8. The comprehensive testing equipment for engine pulley bearings according to claim 7, characterized in that: The drive structure includes a drive motor, and a multi-ribbed belt is connected between the output end of the drive motor and the main shaft pulley via belt drive. A wedge-shaped groove for cooperating with the multi-ribbed belt is provided on the outer peripheral wall of the main shaft pulley.

9. The comprehensive testing equipment for engine pulley bearings according to claim 8, characterized in that: An adjustment plate and a support plate are provided on the test bench corresponding to the position of the drive motor. Two transmission screws are arranged opposite each other on the support plate. The starting end of the transmission screw is rotatably mounted on the support plate and the end of the transmission screw is threadedly connected to the adjustment plate. Two adjustment slots are arranged opposite each other on the adjustment plate. A locking bolt is detachably connected between the housing of the drive motor and the adjustment slots. The adjustment slots are arranged perpendicularly to the transmission screws.

10. The comprehensive testing equipment for engine pulley bearings according to claim 1, characterized in that: The main pulley assembly includes at least one test shaft and a test pulley rotatably mounted on the test shaft. A first retaining edge is circumferentially formed on the outer peripheral wall of the test shaft. The test shaft is fixed to a tooling plate, and a test cavity for the installation and operation of the test bearing is formed between the outer peripheral wall of the test shaft and the inner peripheral wall of the test pulley. A locking nut for cooperating with the first retaining edge to clamp and fix the inner ring of the test bearing is threaded onto the test shaft. The auxiliary pulley assembly includes at least one auxiliary test shaft and an auxiliary test pulley rotatably mounted on the auxiliary test shaft. A second retaining edge is circumferentially formed on the outer peripheral wall of the auxiliary test shaft. The auxiliary test shaft is fixed to a tooling plate, and a test cavity for the installation and operation of the auxiliary test bearing is formed between the outer peripheral wall of the auxiliary test shaft and the inner peripheral wall of the auxiliary test pulley. A retaining ring for cooperating with the second retaining edge to clamp and fix the inner ring of the auxiliary test bearing is detachably connected to the auxiliary test shaft.

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