A rolling bearing swing test device

Abstract

The present invention discloses a rolling bearing swing test device, comprising a transmission component, a test bench, a test head seat and a test head. The transmission component is fixed on the test bench, and the test bench is placed in a standard laboratory; the test head seat is fixed on the test bench; the test head is installed in the cavity of the test head seat; the test shaft in the test head is connected to the transmission component through a transmission shaft and a coupling, thereby driving the test bearing in the test head to rotate. The servo motor of the transmission component realizes the swing function by forward and reverse rotation and records the number of swings, and the swing angle is obtained by a reading head; the test head seat has an axial oil cylinder and a radial oil cylinder, which provide axial load and radial load when the bearing is subjected to a swing test; a vibration sensor and a temperature sensor are installed on the test head, which can collect vibration signals and temperature signals in real time during the bearing test. The present invention is stable and reliable under test conditions, meets the swing test requirements of rolling bearings, and can effectively test the swing performance of bearings.

Description

Technical Field

[0001] The invention belongs to the field of rolling bearing detection and testing, and in particular relates to a rolling bearing swing test device. Background Art

[0002] Bearings, the hinge of the machinery industry, are facing increasingly stringent requirements and a growing market demand for personalized products, driven by the rapid advancement of manufacturing technology. Bearings come in a variety of forms, generally classified by their motion as unidirectional rotation, circumferential reciprocating oscillating, and axial reciprocating oscillating. Currently, oscillating bearings are widely used in aviation, aerospace, heavy industry, light industry, electromechanical, and construction, pushing their oscillation performance to new heights. To ensure and verify the performance of oscillating bearings, it is imperative to develop rolling bearing oscillation test equipment and continuously feed experimental data into the design and manufacturing processes to truly address rolling bearing quality issues at the source.

[0003] Currently, most testing machines used to evaluate bearing life, durability, or reliability are single-axis rotating. Very few are specifically designed for circular reciprocating oscillation. Even those currently available are mostly modified from single-axis rotating machines or are specialized for spherical plain bearings. Standardizing and establishing specialized rolling bearing oscillation test equipment, simulating operating conditions, and detecting and recording bearing vibration, temperature, oscillation angle, frequency, and number of oscillations in real time are crucial areas of research for bearing upgrades and quality assurance. Summary of the Invention

[0004] The present invention aims to address the shortcomings of existing technologies and provide a rolling bearing oscillation test device. This device can be used to test the oscillation performance of rolling bearings, detecting and recording bearing oscillation angle, frequency, number of oscillations, vibration, and temperature in real time. This test system effectively simulates operating conditions and ensures data accuracy during testing.

[0005] The objective of the present invention is achieved through the following technical solutions: a rolling bearing swing test device, comprising: a transmission component, a test bench, a test head seat and a test head; the transmission component and the test head seat are mounted on the test bench; the test head is mounted in the cavity of the test head seat; the test head is connected to the transmission component through a transmission shaft so that the test bearing swings according to the test conditions; the test head seat is provided with an axial oil cylinder and a radial oil cylinder for providing a test load; the transmission component is provided with a monitoring component, which is connected to a computer for communicating with the computer and is used to monitor the swing angle of the test bearing in real time; the test head is provided with a monitoring component, which is connected to a computer for communicating with the computer and is used to monitor the vibration and temperature of the test bearing in real time.

[0006] Furthermore, the transmission component includes transmission components and monitoring components;

[0007] The transmission components include a servo motor, a reducer, a support plate, a transmission shaft and a coupling. The servo motor is fixed to the reducer, and the output torque is proportional to the reduction ratio of the reducer. The reducer is fixed to the support plate to ensure concentricity with the test bearing. One end of the coupling is connected to the transmission shaft, and the other end is connected to the reducer, and both are keyed.

[0008] The monitoring components include a magnetic ring, a reading head and a bracket. The inner hole of the magnetic ring is interference fit with the coupling near the reducer end and is then fixed on the coupling. The reading head is installed on one end of the bracket, and the other end of the bracket is installed on the support plate. The reading head reads the magnetic strips on the magnetic ring through electromagnetic induction and obtains the bearing swing angle based on the number of magnetic strips read. The resolution of the magnetic strips on the magnetic ring is selected according to the monitoring accuracy requirements. The higher the monitoring accuracy requirements, the higher the magnetic strip resolution. In addition, the distance between the reading head and the magnetic ring during installation is between 0.5mm and 0.8mm.

[0009] Furthermore, the computer sets the swing frequency, swing angle and number of swings, and records the number of swings according to the forward and reverse rotation of the motor. The test stops after the set number of swings is reached. During the test, the reliability of the test process is monitored by the swing angle obtained by the reading head.

[0010] Furthermore, the test head seat includes a test cavity and a cylinder;

[0011] The test cavity comprises an axis-penetrating plate, a front side plate, an axial loading plate, a radial loading plate, a left pad, and a right pad; the axis-penetrating plate is used to pass the transmission shaft; the axis-penetrating plate is fixed to the front side plate; the front side plate is fixed to the axial loading plate; the axial loading plate is fixed to the radial loading plate; the radial loading plate is fixed to the axis-penetrating plate; the axis-penetrating plate, the front side plate, the axial loading plate, and the radial loading plate form a cavity, the left pad is placed on the far left side of the cavity, and the right pad is placed on the far right side of the cavity, the left pad and the right pad are provided with lubricating oil circuits inside, and lubricating oil is provided to the test bearing at the start of the test;

[0012] The oil cylinder includes an axial loading oil cylinder and a radial loading oil cylinder. The axial loading oil cylinder is fixed to the axial loading plate and provides an axial loading force for the test bearing at the beginning of the test; the radial loading oil cylinder is fixed to the radial loading plate and provides a radial loading force for the test bearing at the beginning of the test.

[0013] Furthermore, the test head includes monitoring components, test fixtures and test bearings;

[0014] The monitoring components include a temperature sensor and a vibration sensor, which are used to monitor the real-time temperature and vibration information of the test bearing respectively;

[0015] The test tooling includes an end load body, a test shaft, an end bushing, a middle load body, a middle bushing, an isolation ring, a locking nut and a disassembly ring. The test shaft is connected to the transmission shaft, and disassembly rings are installed on both sides of the test shaft, and the two are clearance-fitted; the test bearing is installed on the test shaft, and the two are interference-fitted, and the two ends of the test bearing are locked by locking nuts; the isolation ring is installed on the test shaft, and the two are clearance-fitted; the end bushing is installed on the end load body, and the two are clearance-fitted; the middle bushing is installed on the middle load body, and the two are clearance-fitted; the test bearing installed on the test shaft is installed on the end bushing and the middle bushing, and the inner diameters of the end bushing and the middle bushing are set according to the outer diameter of the test bearing.

[0016] The beneficial effects of the present invention are as follows: the present invention can test the swing performance of rolling bearings, meet the working condition requirements of their load, swing frequency, and swing angle, can effectively simulate the working condition information of the swing bearing, the vibration and temperature during the bearing test can be collected and recorded in real time, and the swing angle can be monitored in real time by the reading head, effectively ensuring the accuracy and real-time nature of the bearing test performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall structural diagram of a rolling bearing swing test device provided by the present invention;

[0018] Figure 2 This is a structural diagram of the transmission components of the present invention;

[0019] Figure 3 This is a structural diagram of the test head base of the present invention;

[0020] Figure 4 This is a structural diagram of the test head of the present invention;

[0021] In the figure: transmission component 1, test bench plate 2, test head base 3, test head 4, servo motor 5, reducer 6, support plate 7, transmission shaft 8, coupling 9, magnetic ring 10, reading head 11, bracket 12, through-axis plate 13, front side plate 14, axial loading plate 15, axial loading cylinder 16, radial loading plate 17, radial loading cylinder 18, left pad 19, right pad 20, temperature sensor 21, vibration sensor 22, end load body 23, test shaft 24, end bushing 25, middle load body 26, middle bushing 27, isolation ring 28, locking nut 29, test bearing 30, disassembly ring 31. DETAILED DESCRIPTION

[0022] The present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. The main technical parameters of the present invention are: servo motor speed 0-3000 r / min; reducer reduction ratio of 1:50, accuracy of ±20"; maximum radial load of 100 kN, error ≤±2%; maximum axial load of 50 kN, error ≤±2%; computer monitoring and recording of information such as the swing angle, number of swings, vibration and temperature of the test bearing. However, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] like Figure 1 As shown, the present invention provides a rolling bearing swing test device for testing the swing performance of a rolling bearing, comprising: a transmission component 1, a test bench 2, a test head seat 3 and a test head 4; wherein the transmission component 1 and the test head seat 3 are mounted on the test bench 2; when the test starts, the test head 4 is mounted in the cavity of the test head seat 3; the test head 4 is connected to the transmission component 1 through a transmission shaft, so that the test bearing swings according to the test conditions; the axial oil cylinder and the radial oil cylinder on the test head seat 3 provide the test load; the transmission component 1 is provided with a monitoring component, which is connected to the computer for communication and is used to monitor the swing angle of the test bearing in real time; the test head 4 is provided with a monitoring component, which is connected to the computer for communication and is used to monitor the vibration and temperature of the test bearing in real time.

[0024] like Figure 2As shown, the transmission component 1 includes transmission components and monitoring components, wherein the transmission components include a servo motor 5, a reducer 6, a support plate 7, a transmission shaft 8 and a coupling 9. The servo motor 5 is fixed to the reducer 6 with bolts, and the output torque is proportional to the reduction ratio of the reducer. The swing test device of the present invention can perform a heavy-load swing test; the reducer 6 is fixed to the support plate 7 with bolts to ensure concentricity with the test bearing; one end of the coupling 9 is connected to the transmission shaft 8, and the other end is connected to the reducer 6, and both are key-connected. The monitoring components include a magnetic ring 10, a readout head 11, and a bracket 12. The inner bore of the magnetic ring 10 forms a slight interference fit with the coupling 9 near the reducer end, securing it to the coupling 9. The readout head 11 is bolted to the bracket 12, the other end of which is bolted to the support plate. The readout head 11 uses electromagnetic induction to read the magnetic stripes on the magnetic ring 10. The bearing oscillation angle is calculated based on the number of stripes read. A computer sets the oscillation frequency, angle, and number of swings, and records the number of swings according to the motor's forward and reverse rotation. The test stops when the set number of swings is reached. During the test, the swing angle obtained by the readout head 11 is used to monitor the reliability of the test process. The resolution of the magnetic stripes on the magnetic ring 10 can be selected based on the monitoring accuracy requirements. The higher the monitoring accuracy, the higher the resolution, generally ranging from a few hundred to tens of thousands. Furthermore, the distance between the readout head and the magnetic ring during installation is generally between 0.5 mm and 0.8 mm.

[0025] like Figure 3 As shown, the test head seat 3 includes a test cavity and an oil cylinder; wherein the test cavity includes an axis-through plate 13, a front side plate 14, an axial loading plate 15, a radial loading plate 17, a left pad 19 and a right pad 20, wherein the axis-through plate 13 is used to pass through the transmission shaft 8, and the axis-through plate 13 is fixed to the front side plate 14 by bolts; the front side plate 14 is fixed to the axial loading plate 15 by bolts; the axial loading plate 15 is fixed to the radial loading plate 17 by bolts; the other end of the radial loading plate 17 is fixed to the axis-through plate 13 by bolts; the above four form a cavity, the left pad 19 is placed to the leftmost side of the cavity, and the right pad 20 is placed to the rightmost side of the cavity, and there are lubricating oil circuits inside the left pad 19 and the right pad 20, and lubricating oil is provided to the test bearing at the beginning of the test. The oil cylinder includes an axial loading oil cylinder 16 and a radial loading oil cylinder 18. The axial loading oil cylinder 16 is fixed by bolts and the axial loading plate 15, and provides an axial loading force for the test bearing at the beginning of the test; the radial loading oil cylinder 18 is fixed by bolts and the radial loading plate 17, and provides a radial loading force for the test bearing at the beginning of the test.

[0026] like Figure 4As shown, the test head 4 includes monitoring components, test fixtures and test bearings 30; wherein the monitoring components include a temperature sensor 21 and a vibration sensor 22, which are used to monitor the real-time temperature and vibration information of the test bearing respectively; wherein the test fixture includes an end load body 23, a test shaft 24, an end bushing 25, a middle load body 26, a middle bushing 27, an isolation ring 28, a locking nut 29 and a disassembly ring 31, wherein the test shaft 24 is connected to the transmission shaft 8, and disassembly rings 31 are installed on both sides of the test shaft 24, and the two are clearance-matched; The test bearing 30 is installed to the test shaft 24, and the two are interference fit; the isolation ring 28 is installed to the test shaft 24, and the two are clearance fit; the locking nut 29 locks the two ends of the test bearing 30 installed to the test shaft 24; the end bushing 25 is installed to the end load body 23, and the two are clearance fit; the middle bushing 27 is installed to the middle load body 26, and the two are clearance fit; the test bearing 30 installed to the test shaft 24 is installed to the end bushing 25 and the middle bushing 27, and the inner diameters of the end bushing 25 and the middle bushing 27 are determined according to the outer diameter of the test bearing 30.

[0027] The specific test process is as follows:

[0028] 1. First, install the two disassembly rings 31 on the left and right sides of the test shaft 24 and install them to the step position of the test shaft 24; then install the two sets of bearings on the left and right sides of the test shaft 24 by press-fitting, and install them to the end faces of the disassembly rings 31; then install the isolation rings 28 on the left and right sides of the test shaft 24 and install them to the end faces of the two sets of bearings; then install the two sets of test bearings 30 on the left and right sides of the test shaft 24 by press-fitting, and install them to the end faces of the isolation rings 28; finally, lock the two ends of the test shaft 24 with the locking nuts 29 to prevent the test bearings 30 from axial movement and slipping; the test bearing installation test shaft link is completed.

[0029] 2. Install the two end bushings 25 into the two end load bodies 23, with the outer diameter of the end bushings 25 and the inner diameter of the end load body 23 having a clearance fit; then install the middle bushing 27 into the middle load body 26, with the outer diameter of the middle bushing 27 and the inner diameter of the middle load body 26 having a clearance fit; then pass the test shaft 24 with the test bearings installed through the middle bushing 27, with the outer diameters of the two middle sets of bearings matching the inner diameter of the middle bushing 27, and the outer diameters of the two sets of test bearings at both ends matching the inner diameters of the end bushings 25; then the complete test fixture is installed.

[0030] 3. Hoist the installed test fixture as a whole into the test chamber, connect the test shaft 24 with the transmission shaft 8, and lock the transmission shaft 8 at one end of the coupling 9 after the connection is in place; insert the temperature sensor 21 into the temperature holes of the load body 23 and the middle load body 26; then fix the vibration sensor 22 to the mounting hole of the middle load body 26; the installation of the entire test head is completed.

[0031] 4. Set the working condition information of the test bearing on the computer monitoring interface: load, swing angle, swing frequency, and number of swings. Click the start button to start the test. The computer monitoring interface displays the test bearing temperature, vibration, number of swings, swing angle and other parameter information in real time.

[0032] The above embodiments are used to illustrate the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A rolling bearing swing test device, characterized in that: include: A transmission component (1), a test bench (2), a test head seat (3) and a test head (4); the transmission component (1) and the test head seat (3) are mounted on the test bench (2); the test head (4) is mounted in a cavity of the test head seat (3); the test head (4) is connected to the transmission component (1) via a transmission shaft, so that the test bearing swings according to the test conditions; the test head seat (3) is provided with an axial oil cylinder and a radial oil cylinder for providing a test load; the transmission component (1) is provided with a monitoring component, which is connected to a computer for real-time monitoring of the swing angle of the test bearing; the test head (4) is provided with a monitoring component, which is connected to a computer for real-time monitoring of the vibration and temperature of the test bearing; The transmission component (1) comprises a transmission component and a monitoring component; The transmission components include a servo motor (5), a reducer (6), a support plate (7), a transmission shaft (8) and a coupling (9). The servo motor (5) is fixed on the reducer (6), and the output torque is proportional to the reduction ratio of the reducer. The reducer (6) is fixed on the support plate (7) to ensure concentricity with the test bearing. One end of the coupling (9) is connected to the transmission shaft (8), and the other end is connected to the reducer (6), and both are key-connected. The monitoring components include a magnetic ring (10), a reading head (11) and a bracket (12); the inner hole of the magnetic ring (10) is interference-fitted with the coupling (9) near the reducer end, and is then fixed on the coupling (9); the reading head (11) is mounted on one end of the bracket (12), and the other end of the bracket (12) is mounted on the support plate (7); the reading head (11) reads the magnetic strips on the magnetic ring (10) by electromagnetic induction, and obtains the bearing swing angle according to the number of read magnetic strips; the resolution of the magnetic strips on the magnetic ring (10) is selected according to the monitoring accuracy requirement, and the higher the monitoring accuracy requirement, the higher the magnetic strip resolution; in addition, the distance between the reading head and the magnetic ring during installation is between 0.5 mm and 0.8 mm; The test head seat (3) comprises a test cavity and an oil cylinder; The test cavity comprises an axis-penetrating plate (13), a front side plate (14), an axial loading plate (15), a radial loading plate (17), a left pad (19) and a right pad (20); the axis-penetrating plate (13) is used to pass through the transmission shaft (8); the axis-penetrating plate (13) and the front side plate (14) are fixed; the front side plate (14) and the axial loading plate (15) are fixed; the axial loading plate (15) and the radial loading plate (17) are fixed; the radial loading plate (17) and the axis-penetrating plate (13) are fixed; the axis-penetrating plate (13), the front side plate (14), the axial loading plate (15) and the radial loading plate (17) form a cavity, the left pad (19) is placed at the leftmost side of the cavity, and the right pad (20) is placed at the rightmost side of the cavity, and there are lubricating oil circuits inside the left pad (19) and the right pad (20), and lubricating oil is provided to the test bearing at the beginning of the test; The oil cylinder comprises an axial loading oil cylinder (16) and a radial loading oil cylinder (18). The axial loading oil cylinder (16) and the axial loading plate (15) are fixed to provide an axial loading force for the test bearing at the beginning of the test; the radial loading oil cylinder (18) and the radial loading plate (17) are fixed to provide a radial loading force for the test bearing at the beginning of the test.

2. A rolling bearing oscillation test device according to claim 1, characterized in that: The computer sets the swing frequency, swing angle and number of swings, and records the number of swings according to the forward and reverse rotation of the motor. The test stops when the set number of swings is reached. During the test, the swing angle obtained by the reading head (11) is used to monitor the reliability of the test process.

3. The rolling bearing oscillation test device according to claim 1, characterized in that: The test head (4) includes monitoring components, a test fixture and a test bearing (30); The monitoring components include a temperature sensor (21) and a vibration sensor (22), which are used to monitor the real-time temperature and vibration information of the test bearing respectively; The test fixture comprises an end load body (23), a test shaft (24), an end bushing (25), a middle load body (26), a middle bushing (27), an isolation ring (28), a locking nut (29) and a disassembly ring (31). The test shaft (24) is connected to the transmission shaft (8). The disassembly rings (31) are installed on both sides of the test shaft (24) with clearance fit. The test bearing (30) is installed on the test shaft (24) with interference fit. The two ends of the test bearing (30) are locked by locking. The nut (29) is locked; the isolation ring (28) is installed on the test shaft (24), and the two are clearance-matched; the end bushing (25) is installed on the end load body (23), and the two are clearance-matched; the middle bushing (27) is installed on the middle load body (26), and the two are clearance-matched; the test bearing (30) installed on the test shaft (24) is installed on the end bushing (25) and the middle bushing (27), and the inner diameters of the end bushing (25) and the middle bushing (27) are set according to the outer diameter of the test bearing (30).

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