Engine pulley bearing comprehensive test equipment

Abstract

The application discloses an engine belt wheel bearing comprehensive test equipment, which comprises a test table and a rack, a tool plate and a fixed plate are arranged on the rack, a flat belt, a main belt wheel set and an auxiliary belt wheel set are movably arranged on the tool plate, a main shaft belt wheel is rotatably arranged on the fixed plate, the main shaft belt wheel, the main belt wheel set and the auxiliary belt wheel set are connected through the flat belt, a tested bearing is installed on the main belt wheel set, a test bearing is installed on the auxiliary belt wheel set, a vibration loading structure for applying a vibration force to the tool plate to simulate the vibration environment of the tested bearing during actual operation and a radial loading structure for applying a radial load to the tested bearing are arranged on the rack, and a driving assembly for driving the main shaft belt wheel to rotate to simulate the actual operation condition of the tested bearing is arranged on the test table. The application solves the problem that the traditional belt wheel bearing test tool is difficult to integrate and control the key influencing factors such as slip, static electricity, impact vibration and load and to perform corresponding simulation test on the bearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing test equipment, in particular to an engine pulley bearing comprehensive test equipment. BACKGROUND

[0002] In the fields of wind power generation, automobiles, high-end equipment manufacturing, etc., the reliable operation of bearings used in generators, tension pulleys, wind turbine gearboxes and electrical accessories directly determines the safety and service life of the entire machine. In recent years, a "white structure spalling" microscopic failure phenomenon has been frequently found in the failure analysis of bearings in the above-mentioned fields: that is, white plastic material is generated in the bearing crack and spalling area, which can significantly shorten the service life of the bearing, and even cause serious consequences such as equipment downtime and safety accidents, so it has become a key research direction of the industry and universities.

[0003] However, the existing test equipment cannot meet the research needs of the white structure spalling of the generator pulley angular contact roller bearing: first, most of the existing equipment is designed for thrust bearings, and cannot simulate the actual operating environment of deep groove ball bearings (especially in the pulley working condition), and it is difficult to reproduce the electrostatic effect caused by the friction slip of the pulley and the belt, and the slip friction effect of the rollers and the inner and outer rings in the bearing due to acceleration / deceleration; second, the existing equipment often uses electric vibrators or centrifugal vibration motors to provide vibration, and such devices have electromagnetic leakage problems, which will interfere with the test process sensitive to static electricity and current, resulting in distorted test data; third, the transmission and loading structure of the existing equipment is complex (such as the need to additionally set up a tension pulley), which is easy to introduce redundant interference factors, affecting the accurate reproduction and mechanism analysis of the white structure spalling phenomenon. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides an engine pulley bearing comprehensive test equipment to solve the problem that the traditional pulley bearing test tooling is difficult to integrate and control the key influencing factors such as slip, static electricity, impact vibration and load, and to carry out corresponding simulation test on the bearing.

[0005] In order to achieve the above object, the application provides a kind of engine pulley bearing comprehensive test equipment, including test table and vertical test table on the rack, the rack is provided with tooling plate and fixed plate, the tooling plate is movably provided with flat belt, main pulley group and vice pulley group, the fixed plate is rotatably provided with main shaft pulley, the main shaft pulley, main pulley group and vice pulley group are connected by flat belt transmission to simulate the slip and electrostatic conditions that appear when the test bearing is actually running, the main pulley group is installed with test bearing, the vice pulley group is installed with test bearing, the rack is provided with vibration loading structure for applying vibration force to tooling plate to simulate the vibration environment condition of test bearing when it is actually running and radial loading structure for applying radial load to test bearing, the test table is provided with driving assembly for driving main shaft pulley to run to simulate the actual running condition of test bearing.

[0006] The above technical scheme has the advantages that: in the above structure, the test bearing is installed on the main pulley group, and the test bearing is installed on the vice pulley group, which can clearly distinguish the test object and the auxiliary part, ensure that the test focuses on the test bearing, and the main shaft pulley, the main pulley group and the vice pulley group are connected by flat belt transmission, wherein the flat belt is preferably a flat belt that is easy to slip, that is, by the above setting, the friction and slip phenomenon between the pulley and the flat belt in the prior art due to its electrostatic effect can be considered, and the slip and electrostatic conditions of the test bearing when it is actually running can be accurately simulated, avoiding the problem that a single transmission structure cannot reproduce the key failure inducement; the driving assembly drives the main shaft pulley to run, which can simulate the actual running speed and other conditions of the test bearing to provide basic operating conditions for the test; the vibration loading structure applies vibration force to the tooling plate, which can reproduce the vibration environment of the test bearing, and the radial loading structure applies radial load to the test bearing, which can simulate the actual stress condition, and the combination of the two realizes integrated simulation of multiple conditions, without the need for multiple devices for separate tests, improving test efficiency and specificity, and providing comprehensive condition support for the test bearing white structure spalling research.

[0007] The application further provides that: the transmission plate is movably arranged below the tooling plate, and the transmission plate and the tooling plate are linked and matched 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 in sliding cooperation with the pulley, the transmission cable is connected to the loading cylinder at the beginning, and the transmission cable is linked and matched to the transmission plate at the end, the loading cylinder is arranged on the test table, and the loading cylinder drives the transmission plate to move through the transmission cable when it operates.

[0008] The technical scheme has the beneficial effects that: in the above technology, the transmission plate below the tool plate is linked with the tool plate, so that the force of the radial loading structure is evenly transmitted to the tool plate, avoiding local stress concentration of the tool plate caused by direct loading, and protecting the stability of the tool plate structure; in the radial loading structure, the transmission cable is arranged around the pulley and is in sliding cooperation, which can reduce the transmission resistance of the cable, improve the transmission efficiency of the loading force, and the pulley can change the transmission direction of the force, optimize the layout of the loading structure on the test bench, and save equipment space; the loading cylinder is arranged on the test bench and drives the transmission plate to move through the transmission cable, which can stably output the loading force, accurately control the radial load of the tested bearing, avoid loading impact interference test, ensure the smooth application of the radial load, and further improve the accuracy of the test data.

[0009] The present application further provides that: two guide shafts are arranged on the outer wall of the test bench, and guide blocks are arranged on the tool plate corresponding to the positions of the two guide shafts, and first through holes are arranged on the guide blocks for the guide shafts to pass through, and the guide blocks are movably arranged on the guide shafts along the axis direction of the guide shafts, and second through holes are arranged on the transmission plate for the guide shafts to pass through, and the guide blocks are connected with the transmission plate through damping springs.

[0010] The technical scheme has the beneficial effects that: in the above technology, the transmission plate below the tool plate is linked with the tool plate, so that the force of the radial loading structure is evenly transmitted to the tool plate, avoiding local stress concentration of the tool plate caused by direct loading, and protecting the stability of the tool plate structure; in the radial loading structure, the transmission cable is arranged around the pulley and is in sliding cooperation, which can reduce the transmission resistance of the cable, improve the transmission efficiency of the loading force, and the pulley can change the transmission direction of the force, optimize the layout of the loading structure on the test bench, and save equipment space; the loading cylinder is arranged on the test bench and drives the transmission plate to move through the transmission cable, which can stably output the loading force, accurately control the radial load of the tested bearing, avoid loading impact interference test, ensure the smooth application of the radial load, and further improve the accuracy of the test data.

[0011] The present application further provides that: two guide shafts are arranged on the outer wall of the test bench, and guide blocks are arranged on the tool plate corresponding to the positions of the two guide shafts, and first through holes are arranged on the guide blocks for the guide shafts to pass through, and the guide blocks are movably arranged on the guide shafts along the axis direction of the guide shafts, and second through holes are arranged on the transmission plate for the guide shafts to pass through, and the guide blocks are connected with the transmission plate through damping springs.

[0012] The technical scheme has the beneficial effects that: the force sensor on the bench can monitor the load force transmitted by the transmission cable in real time, so that the test personnel can accurately control the radial load parameter, ensure that the load meets the test setting requirements, and improve the accuracy and traceability of the test data; the universal bolt connected between the force sensor and the end of the transmission cable can eliminate the lateral force generated during transmission, avoid the interference of the lateral force with the monitoring accuracy of the force sensor, and reduce the damage of the lateral force to the transmission cable and the transmission plate, so as to ensure the accuracy of the force transmission direction; meanwhile, the force sensor is connected with the transmission plate, so that the load borne by the transmission plate can be directly sensed, the real-time performance of the load monitoring is improved, and reliable basis is provided for dynamic regulation and control in the test process. The force sensor is a prior art, and therefore the structure and function thereof will not be described in detail.

[0013] The application further provides that the vibration structure comprises at least one vibration generator arranged on the top of the tool plate, and the vibration generator is connected with a vibration connector at the output end, and the vibration connector is detachably connected with the tool plate.

[0014] The technical scheme has the beneficial effects that: in the vibration structure, the at least one vibration generator is arranged on the top of the tool plate, the number of vibration generators can be adjusted according to the test requirements, different vibration intensities and frequencies can be simulated, and various test conditions can be adapted; the vibration connector at the output end of the vibration generator is detachably connected with the tool plate, so that the vibration generator can be easily installed, disassembled and maintained, and the difficulty of equipment maintenance is reduced; the vibration generator is a pneumatic vibrator, which can effectively avoid electromagnetic leakage generated during the operation of an electric or centrifugal vibration motor, eliminate the interference of electromagnetism on the simulation of electrostatic conditions in the test, ensure the accuracy of electrostatic condition parameters, and stably output low-frequency high-impact vibration, so as to accurately reproduce the vibration environment of the test bearing in actual operation and improve the simulation authenticity of the test condition.

[0015] The application further provides that the tool plate is made of high-strength aluminum-magnesium alloy material.

[0016] The technical scheme has the beneficial effects that: the tool plate is made of high-strength aluminum-magnesium alloy material, has high structural strength, can withstand the forces generated by vibration and load during the test, avoids deformation or damage of the tool plate, ensures the structural stability of the tool plate, thereby ensures the fixed installation position of the main and auxiliary pulley sets, reduces the interference of structural deformation on the test, and at the same time, the material has relatively light weight, can improve the maximum value of the impact vibration acceleration of the tool plate, makes the tool plate more easily respond to the vibration output of the vibration generator, accurately transmits the vibration condition, and avoids the vibration transmission lag caused by the excessive weight of the tool plate.

[0017] The application further provides that the fixed plate is detachably connected with a positioning main shaft, the main shaft pulley is rotationally arranged on the positioning main shaft, and the main shaft pulley is connected with the positioning main shaft through a main shaft bearing, the main shaft pulley is coaxially arranged with the positioning main shaft, a containing groove for locally containing the flat belt is annularly arranged on the outer circumferential wall of the main shaft pulley, and the main shaft pulley is a composite transmission wheel.

[0018] The above technical scheme has the advantages that: the fixed plate is detachably connected with the positioning main shaft, facilitating the installation, replacement and maintenance of the positioning main shaft, the main shaft pulley and the main shaft bearing, adapting to the test requirements of main shaft pulleys of different specifications, and improving the universality of the equipment; the main shaft pulley is rotationally arranged on the positioning main shaft and coaxial with the positioning main shaft, and cooperates with the main shaft bearing to ensure the coaxiality of the main shaft pulley during rotation, reduce the influence of rotation eccentricity on transmission accuracy, ensure the stability of flat belt transmission, and avoid the simulation deviation caused by eccentricity; the containing groove on the outer circumferential wall of the main shaft pulley can limit the flat belt to prevent the flat belt from falling off during transmission, and ensure the continuity of transmission; at the same time, the main shaft pulley adopts a composite transmission wheel structure, which can reduce the rotational inertia, adapt to the high speed and sudden speed change requirements of the tested bearing in actual operation, reduce the interference of inertia on the test working condition simulation, and improve the test authenticity.

[0019] The application further provides that the driving structure comprises a driving motor, a multi-vee belt is drivingly connected between the output end of the driving motor and the main shaft pulley, and a wedge-shaped groove for cooperating with the multi-vee belt is arranged on the outer circumferential wall of the main shaft pulley.

[0020] The above technical scheme has the advantages that: the driving motor is drivingly connected with the main shaft pulley through the multi-vee belt, the multi-vee belt has high transmission efficiency and can accurately transmit the driving motor power, ensuring that the rotational speed of the main shaft pulley meets the test setting requirements, avoiding the rotational speed deviation caused by low transmission efficiency, ensuring the accuracy of the simulation of the running working condition of the tested bearing, the wedge-shaped groove on the outer circumferential wall of the main shaft pulley cooperates with the multi-vee belt to increase the contact area between the two, improve the transmission stability, prevent slipping during transmission, ensure the continuity of power transmission, and the multi-vee belt transmission can buffer the impact when the driving motor starts and stops, reduce the damage to the main shaft pulley and related components, and prolong the service life of the equipment.

[0021] The application further provides that the test bench is provided with an adjusting plate and a supporting plate corresponding to the position of the driving motor, two transmission lead screws are oppositely arranged on the supporting plate, the transmission lead screw is rotationally arranged on the supporting plate at the beginning end and is threadedly connected with the adjusting plate at the end, two adjusting grooves are oppositely arranged on the adjusting plate, locking bolts are detachably connected between the shell of the driving motor and the adjusting grooves, and the adjusting grooves are oppositely and perpendicularly arranged with the transmission lead screws.

[0022] The test table has the following beneficial effects: the two transmission lead screws are arranged on the support plate, one end is rotationally arranged on the support plate, and the other end is threadedly connected with the adjusting plate, so that the horizontal position of the adjusting plate can be adjusted, the horizontal inclination angle of the adjusting plate can be adjusted, the horizontal installation precision of the driving motor is ensured, and transmission deviation caused by motor inclination is avoided; the two adjusting grooves on the adjusting plate are perpendicular to the transmission lead screws, the driving motor shell is connected through the locking bolt, the vertical position of the driving motor can be adjusted, the multidimensional adjustment of the driving motor position is realized, the transmission center of the driving motor output end and the main shaft pulley is aligned, the multi-belt drive precision and stability are improved, and transmission deviation interference test working conditions are avoided; the multidimensional adjustment structure is suitable for the installation requirements of driving motors of different specifications, improves the versatility of the equipment, and facilitates the adjustment of driving parameters according to the requirements in the test.

[0023] The application further provides that: the main pulley set comprises at least one test shaft and a test pulley rotationally arranged on the test shaft, a first retaining edge is annularly arranged on the outer circumferential wall of the test shaft, the test shaft is fixed to the tool plate, and a test cavity for installing and running the bearing under test is formed between the outer circumferential wall of the test shaft and the inner circumferential wall of the test pulley, a locking nut for cooperating with the first retaining edge to clamp and fix the inner ring of the bearing under test is threadedly connected to the test shaft, the auxiliary pulley set comprises at least one test shaft and a test pulley rotationally arranged on the test shaft, a second retaining edge is annularly arranged on the outer circumferential wall of the test shaft, the test shaft is fixed to the tool plate, and a test cavity for installing and running the bearing under test is formed between the outer circumferential wall of the test shaft and the inner circumferential wall of the test pulley, a locking nut for cooperating with the first retaining edge to clamp and fix the inner ring of the bearing under test is threadedly connected to the test shaft.

[0024] The application further provides that: the application further provides that: the main pulley set comprises at least one test shaft and a test pulley rotationally arranged on the test shaft, a first retaining edge is annularly arranged on the outer circumferential wall of the test shaft, the test shaft is fixed to the tool plate, and a test cavity for installing and running the bearing under test is formed between the outer circumferential wall of the test shaft and the inner circumferential wall of the test pulley, a locking nut for cooperating with the first retaining edge to clamp and fix the inner ring of the bearing under test is threadedly connected to the test shaft, the auxiliary pulley set comprises at least one test shaft and a test pulley rotationally arranged on the test shaft, a second retaining edge is annularly arranged on the outer circumferential wall of the test shaft, the test shaft is fixed to the tool plate, and a test cavity for installing and running the bearing under test is formed between the outer circumferential wall of the test shaft and the inner circumferential wall of the test pulley, a locking nut for cooperating with the first retaining edge to clamp and fix the inner ring of the bearing under test is threadedly connected to the test shaft. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a front three-dimensional view of the present application;

[0026] Figure 2 is a back three-dimensional view of the present application;

[0027] Figure 3 is a partial three-dimensional view of the present application;

[0028] Figure 4 is a sectional view of the present application in the state that the fixing plate cooperates with the main shaft pulley;

[0029] Figure 5 is a sectional view of the present application in the state that the adjusting plate and its linkage components cooperate;

[0030] Figure 6 is a sectional view of the present application in the state that the test pulley and its linkage components cooperate;

[0031] Figure 7 is a sectional view of the present application in the state that the test pulley and its linkage components cooperate; DETAILED DESCRIPTION

[0032] The application provides an engine belt wheel bearing comprehensive test equipment, which comprises a test table 1 and a rack 11 erected on the test table 1, a tool plate 2 and a fixed plate 3 are arranged on the rack 11, a flat belt 12, a main belt wheel set and an auxiliary belt wheel set are movably arranged on the tool plate 2, a main shaft belt wheel 31 is rotatably arranged on the fixed plate 3, the main shaft belt wheel 31, the main belt wheel set and the auxiliary belt wheel set are connected through the flat belt 12 to simulate the slip and electrostatic working conditions of the tested bearing 13 in actual operation, the tested bearing 13 is installed on the main belt wheel set, the auxiliary tested bearing 14 is installed on the auxiliary belt wheel set, a vibration loading structure for applying a vibration force to the tool plate 2 to simulate the vibration environment working condition of the tested bearing 13 in actual operation and a radial loading structure for applying a radial load to the tested bearing 13 are arranged on the rack 11, a driving assembly for driving the main shaft belt wheel 31 to rotate to simulate the actual operation working condition of the tested bearing 13 is arranged on the test table 1, a transmission plate 4 is movably arranged below the tool plate 2, the transmission plate 4 is connected with the tool plate 2 to drive the tool plate 2 to move synchronously when the transmission plate 4 moves, the radial loading structure comprises a loading cylinder 41, a pulley 42 and a transmission cable 43, the transmission cable 43 is arranged around the pulley 42 and is connected with the pulley 42, the transmission cable 43 is connected with the loading cylinder 41 at the beginning end, and the transmission cable 43 is connected with the transmission plate 4 at the end, the loading cylinder 41 is arranged on the test table 1, and the transmission plate 4 is driven to move by the transmission cable 43 when the loading cylinder 41 operates, two guide shafts 21 are oppositely arranged on the outer wall of the rack 11, guide blocks 22 are arranged on the tool plate 2 at positions corresponding to the two guide shafts 21, first through holes are formed in the guide blocks 22 for the guide shafts 21 to pass through, the guide blocks 22 are movably arranged on the guide shafts 21 along the axis direction of the guide shafts 21, second through holes are formed in the transmission plate 4 for the guide shafts 21 to pass through, and damping springs 23 are connected between the guide blocks 22 and the transmission plate 4, the damping springs 23 are sleeved on the guide shafts 21, a force sensor 44 is movably arranged on the rack 11, a universal bolt 441 is connected between the force sensor 44 and the end of the transmission cable 43, and the force sensor 44 is connected with the transmission plate 4, the vibration structure comprises at least one vibration generator 24 arranged on the top of the tool plate 2, a vibration connector 241 is connected to the output end of the vibration generator 24, and the vibration connector 241 is detachably connected with the tool plate 2, the vibration generator 24 is a pneumatic vibrator, the tool plate 2 is made of high-strength aluminum-magnesium alloy material, a positioning main shaft 32 is detachably connected with the fixed plate 3, the main shaft belt wheel 31 is rotatably arranged on the positioning main shaft 32, and a main shaft bearing 321 is connected between the main shaft belt wheel 31 and the positioning main shaft 32, the main shaft belt wheel 31 and the positioning main shaft 32 are coaxially arranged, and a containing groove 33 for locally containing the flat belt 12 is annularly formed in the outer circumferential wall of the main shaft belt wheel 31.The main shaft pulley 31 is a composite transmission wheel, the drive structure includes a drive motor 5, the output end of the drive motor 5 and the main shaft pulley 31 are connected by a belt transmission, the outer peripheral wall of the main shaft pulley 31 is provided with a wedge-shaped groove 34 for cooperating with the multi-wedge belt 51, the test bench 1 is provided with an adjusting plate 52 and a supporting plate 53 corresponding to the position of the drive motor 5, the supporting plate 53 is provided with two transmission lead screws 531 in opposite positions, the transmission lead screw 531 is rotatably arranged at the supporting plate 53 and the transmission lead screw 531 is threadedly connected with the adjusting plate 52, the adjusting plate 52 is provided with two adjusting grooves 521 in opposite positions, the shell of the drive motor 5 is detachably connected with the adjusting grooves 521 by locking bolts, the adjusting grooves 521 are arranged in opposite vertical positions with the transmission lead screws 531, the main pulley set includes at least one test shaft 6 and a test pulley 61 rotatably arranged on the test shaft 6, the outer peripheral wall of the test shaft 6 is circumferentially provided with a first retaining edge 62, the test shaft 6 is fixed on the tool plate 2 and the test shaft 6 is provided with a test cavity for installing and running the test bearing 13 between the outer peripheral wall of the test shaft 6 and the inner peripheral wall of the test pulley 61, the test shaft 6 is threadedly connected with the locking nut 63 for cooperating with the first retaining edge 62 to clamp and fix the inner ring of the test bearing 13, the secondary pulley set includes at least one test shaft 7 and a test pulley 71 rotatably arranged on the test shaft 7, the outer peripheral wall of the test shaft 7 is circumferentially provided with a second retaining edge 73, the test shaft 7 is fixed on the tool plate 2 and the test shaft 7 is provided with a test cavity for installing and running the test bearing 14 between the outer peripheral wall of the test shaft 7 and the inner peripheral wall of the test pulley 71, the test shaft 7 is detachably connected with the retaining ring 74 for cooperating with the second retaining edge 73 to clamp and fix the inner ring of the test bearing 14.

[0033] The overall operation process of the above engine pulley bearing comprehensive test equipment is as follows:

[0034] 1. Device initialization and component installation and debugging: complete the basic assembly of the test bench and the stand erected on it, first detachably install the positioning main shaft on the fixed plate, assemble the main shaft pulley through the main shaft bearing on the positioning main shaft (ensure that the two are coaxial), and make the outer peripheral container groove of the main shaft pulley adapt to the flat belt; then fix the test shaft of the main pulley group and the test shaft of the auxiliary pulley group on the tool plate, install the test bearing into the test cavity between the test shaft and the test pulley, and fix the inner ring of the test bearing by the first stop edge of the test shaft and the threaded locking nut, install the test bearing into the test cavity between the test shaft and the test pulley, and fix the inner ring of the test bearing by the second stop edge of the test shaft and the detachable stop ring; then install the adjusting plate and the supporting plate at the corresponding position of the test bench, rotate the two transmission screws on the supporting plate to adjust the horizontal position of the adjusting plate, fix the driving motor through the adjusting groove (perpendicular to the transmission screw) and locking bolt on the adjusting plate, ensure that the output end of the driving motor and the multi-wedge belt transmission of the main shaft pulley are accurately aligned, and finally assemble the flat belt on the main shaft pulley, the main pulley group and the auxiliary pulley group, complete the transmission pre-assembly.

[0035] 2. Transmission system start and basic working condition establishment: start the driving motor of the driving assembly, the motor output end drives the main shaft pulley to rotate around the positioning main shaft through the multi-wedge belt (cooperating with the wedge-shaped groove on the outer periphery of the main shaft pulley); the main shaft pulley drives the main pulley group and the auxiliary pulley group to rotate synchronously through the flat belt (partly contained in the main shaft pulley container groove), so that the test bearing on the main pulley group and the test bearing on the auxiliary pulley group rotate synchronously with the pulley, and the flat belt transmission characteristics are used to simulate the slip working condition and the accompanying electrostatic working condition of the test bearing in actual operation, and different actual running speed working conditions of the test bearing are reproduced by adjusting the rotating speed of the driving motor.

[0036] 3. Vibration and radial load loading: start the pneumatic vibration generator of the vibration loading structure (select one or more according to test requirements), the vibration generator transmits vibration force to the tool plate through detachable vibration connectors (high-strength aluminum-magnesium alloy material ensures stable vibration transmission), simulating the vibration environment working condition of the test bearing in actual operation; at the same time, start the loading cylinder of the radial loading structure, the loading cylinder transmits force through transmission steel cable (around the pulley and sliding fit, the pulley changes the direction of force transmission), that is, the loading cylinder pulls the transmission steel cable to make the end of the transmission steel cable pull the transmission plate upward, and then the transmission plate drives the tool plate to move upward, when the tool plate moves, the flat belt is limited by the position of the test pulley, the main shaft pulley and the test pulley, so that the flat belt generates a reverse force, that is, the flat belt applies a radial load to the test bearing, and then simulates the load working condition of the bearing in actual operation; the damping spring between the guide block and the transmission plate in the above process is sleeved on the guide shaft, which buffers the impact generated by loading and vibration, and ensures smooth transmission of load and vibration.

[0037] 4. Test process monitoring and regulation: During the test, the force sensor on the test bench monitors the radial load transmitted by the transmission cable in real time, which facilitates the adjustment of the load size 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 tool plate are changed to adapt to different vibration environment simulation requirements; by adjusting the speed of the driving motor, the actual operating conditions such as acceleration and deceleration of the test bearing are simulated, and at the same time, the guiding effect of the guide shaft on the tool plate and the transmission plate is used to avoid the influence of component deviation on the test accuracy, and to ensure that each working condition parameter is stable and meets the test setting.

[0038] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application. These changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application 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 group, and a secondary pulley group are movably mounted on the tooling plate. A main shaft pulley is rotatably mounted on the fixed plate. The main shaft pulley, main pulley group, and secondary pulley group are connected by a flat belt drive to simulate the slippage and electrostatic conditions that occur during the actual operation of the tested bearing. The tested bearing is mounted on the main pulley group, and a test bearing is mounted on the secondary pulley group. The frame is equipped with a vibration loading structure for applying vibrational force to the tooling plate to simulate the vibrational environment conditions of the tested bearing during actual operation, and a radial loading structure for applying radial load to the tested bearing. The test bench is equipped with a drive assembly for driving the main shaft pulley to simulate the actual operating conditions of the tested bearing. The vibration loading structure includes at least one vibration generator mounted on the top of the tooling plate. The output end of the vibration generator is connected to a vibration connector, which is detachably connected to the tooling plate. The vibration generator is a pneumatic vibrator.

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 tooling plate is made of high-strength aluminum-magnesium alloy.

6. 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.

7. The comprehensive testing equipment for engine pulley bearings according to claim 6, characterized in that: The drive assembly includes a drive motor, and a multi-ribbed belt is belt-driven between the output end of the drive motor and the main shaft pulley. A wedge-shaped groove for engaging with the multi-ribbed belt is provided on the outer peripheral wall of the main shaft pulley.

8. The comprehensive testing equipment for engine pulley bearings according to claim 7, 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.

9. 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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