A high-speed rolling bearing lubrication test bench

Abstract

This invention discloses a high-speed rolling bearing lubrication test bench. The test bench has legs fixedly installed at each of the four corners of a base plate. A lever support plate is rotatably supported on the base plate around a horizontal axis. A motor is fixedly installed on the lever support plate and is fixedly connected to a main shaft. The middle part of the main shaft is rotatably supported on the lever support plate, and the other end extends into the test chamber and is fitted with an inner bushing. The bottom of the test chamber is fixedly installed on the top surface of the base plate. An inner ring is fixedly installed on the outer periphery of the inner bushing. A glass outer ring, coaxial with the inner ring, is fixedly installed inside the test chamber. Multiple balls are evenly distributed in the annular space between the glass outer ring and a circular groove. A lever loading mechanism is installed on the base plate and the lever support plate to provide radial loading force to the inner ring through the lever support plate. This test bench can achieve precise loading of the target bearing, improving the overall stability and accuracy of the test bench, facilitating observation, and enhancing the operability of the test bench.

Description

Technical Field

[0001] This invention relates to the field of bearing lubrication technology, and more specifically to a high-speed rolling bearing lubrication test bench. Background Technology

[0002] Bearings play an irreplaceable role in the mechanical field. Observing the oil film state during bearing operation and further understanding the bearing failure mechanism can improve bearing performance and extend bearing service life. A review of relevant bearing testing machine literature was conducted on topics such as "high-speed rolling bearing oil-air lubrication test bench," "dynamic load loading of rolling bearing test bench," "motor control system based on LabVIEW," "lever structure test bench," and "oil film observation." While there is considerable domestic research in this area, existing test benches are all integrally fixed structures, which suffer from problems such as overly simple loading structures, inaccurate loading, and unfavorable oil film distribution for observation. Summary of the Invention

[0003] In view of this, the present invention provides a high-speed rolling bearing lubrication test bench, which can achieve precise loading of the target bearing, improve the overall stability and accuracy of the test bench, facilitate observation, and improve the operability of the test bench.

[0004] The present invention adopts the following specific technical solution:

[0005] This invention provides a high-speed rolling bearing lubrication test bench, which includes a base plate, support legs, lever load-bearing plate, motor, main shaft, bearing housing, lever loading mechanism, and test chamber.

[0006] Each of the four corners of the base plate is fixedly installed with a support leg, which is used to support the base plate on the ground;

[0007] The lever support plate is rotatably supported on the top of the base plate about a horizontal axis;

[0008] The motor is fixedly mounted on the lever support plate, and the output shaft of the motor is fixedly connected to one end of the main shaft for driving the main shaft to rotate.

[0009] The middle part of the main shaft is rotatably supported by the lever bearing plate through the bearing box and the bearing installed in the bearing box, and the other end extends into the experimental box and is fixedly installed with an inner shaft sleeve.

[0010] The bottom of the experimental chamber is fixedly installed on the top surface of the base plate;

[0011] An inner ring is fixedly installed on the outer circumference of the inner bushing; a circular groove is provided on the outer circumference surface of the inner ring.

[0012] A glass outer ring, coaxial with the inner ring, is fixedly installed inside the experimental chamber; multiple balls are evenly distributed in the annular space between the glass outer ring and the circular groove; lubricating oil is filled between the balls and the glass outer ring; the glass outer ring, the balls, and the inner ring are used to simulate a rolling bearing;

[0013] The experimental chamber has windows on its top and sides for easy observation;

[0014] The lever loading mechanism is installed on the base plate and the lever bearing plate, and is used to provide radial loading force to the inner ring through the lever bearing plate.

[0015] Furthermore, the lever loading mechanism includes a gantry frame, a screw, a tension / compression sensor, a fisheye eye screw, a steel wire, a spring, an eye bolt, and a wing nut;

[0016] The bottom end of the gantry frame is fixedly installed at the end of the lever load-bearing plate away from the experimental chamber.

[0017] The top end of the tension / compression sensor is suspended from the gantry frame by the screw, and the bottom end is connected to the steel wire by the fisheye eye screw.

[0018] A pivot is installed at the outer end of the base plate on one side of the gantry frame;

[0019] The rotation axis of the rotating shaft is set parallel to the horizontal axis of the lever bearing plate;

[0020] The steel wire wraps around the pivot, thus changing from a vertical to a horizontal direction;

[0021] The other end of the steel wire is connected to the spring, and the other end of the spring is connected to the eye bolt;

[0022] The other end of the eye bolt passes through the connector fixedly installed on the base plate and is threadedly connected to the wing nut.

[0023] During loading, the wing nut is rotated, the spring is stretched by the eye bolt, and the gantry is pulled by the steel wire, the fisheye eye screw and the screw, so that the lever load plate can rotate counterclockwise around the horizontal axis, thereby achieving radial loading on the inner ring.

[0024] Furthermore, the motor is fixedly mounted to the lever support plate via a motor support frame;

[0025] The output shaft of the motor is connected to the main shaft by a flexible coupling.

[0026] The bearings in the bearing housing include deep groove ball bearings axially opposite each other along the main shaft and a pair of parallel angular contact ball bearings;

[0027] Along the axial direction of the main shaft, end caps are fixedly connected to both ends of the bearing housing, and the end caps are provided with a central hole through which the main shaft passes.

[0028] Furthermore, it also includes protective pins;

[0029] A connecting plate is fixedly installed at one end of the lever bearing plate facing the experimental box.

[0030] The bottom end of the connecting plate is provided with a through hole, and the axis of the through hole is parallel to the horizontal axis.

[0031] A connecting block, which is positioned opposite to the connecting plate, is fixedly installed on the top surface of the base plate;

[0032] The connecting block is provided with a pin hole coaxial with the through hole;

[0033] The protective pin is inserted into the through hole and the pin hole to keep the lever load-bearing plate in a horizontal state.

[0034] Furthermore, pins are symmetrically arranged on both sides of the base plate, and the pins coincide with the horizontal axis.

[0035] A bearing is fitted onto the outer end of the pin.

[0036] The lever bearing plate is equipped with a rotating plate that corresponds one-to-one with the pin;

[0037] The rotating plate is sleeved on the outer periphery of the bearing, and the rotating plates on both sides and the bearing form two fulcrums of the lever load-bearing plate.

[0038] Furthermore, the outer ring of the glass is a sapphire ring.

[0039] Furthermore, it also includes a microscope and a high-speed camera positioned opposite the window.

[0040] Beneficial effects:

[0041] The high-speed rolling bearing lubrication test bench of this invention adopts a lever structure. A lever support plate capable of rotating around a horizontal axis is formed on the top of the base plate. The motor and main shaft are mounted on the lever support plate. The test chamber is fixedly mounted on the base plate. The end of the main shaft extends into the test chamber, and an inner bushing is installed on the end of the main shaft inside the test chamber. A glass outer ring, balls, and inner ring for simulating rolling bearings are mounted on the inner bushing. Windows for easy observation are provided on the top and sides of the test chamber. A lever loading mechanism is installed on the base plate and the lever support plate to provide radial loading force to the inner ring through the lever support plate. The high-speed bearing lubrication test bench using the above structure… The rolling bearing lubrication test bench can simulate the high-speed rotation of rolling bearings and achieve relatively precise loading. Its internal bushing structure design ensures the spindle's accuracy remains consistent even after repeated disassembly and reassembly of the test bearing during actual use, reducing the difficulty of test bench debugging and improving accuracy. Simultaneously, the innovative design of an "overall lever structure" and an "internal bushing-test bearing combination" reduces the overall size of the test bench, enabling precise loading of the target bearing, improving the overall stability and accuracy of the test bench, and enhancing its operability. The window and glass outer ring of the test chamber facilitate easy observation of the lubrication and operation of the rolling bearing. Attached Figure Description

[0042] Figure 1 This is a three-dimensional structural schematic diagram of the high-speed rolling bearing lubrication test bench of the present invention;

[0043] Figure 2 for Figure 1 Bottom view of the lubrication test bench for medium and high speed rolling bearings;

[0044] Figure 3 for Figure 1 Left view of the lubrication test bench for medium and high speed rolling bearings;

[0045] Figure 4 for Figure 3 A cross-sectional view of the AA section of the lubrication test bench for medium and high speed rolling bearings.

[0046] Among them, 1-base plate, 2-support leg, 3-lever load-bearing plate, 4-motor, 5-main shaft, 6-bearing box, 7-experimental chamber, 8-inner bushing, 9-inner ring, 10-glass outer ring, 11-ball bearing, 12-window, 13-gantry frame, 14-screw, 15-tension and compression sensor, 16-fisheye eye bolt, 17-steel wire, 18-spring, 19-eye bolt, 20-wing nut, 21-rotating shaft, 22-connecting piece, 23-motor support frame, 24-cloverleaf flexible coupling, 25-deep groove ball bearing, 26-angular contact ball bearing, 27-end cover, 28-protective pin, 29-connecting plate, 30-connecting block, 31-pin, 32-bearing, 33-rotating plate, 34-right end cover Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] This invention provides a high-speed rolling bearing lubrication test bench, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the experimental platform includes a base plate 1, support legs 2, lever load-bearing plate 3, motor 4, main shaft 5, bearing box 6, lever loading mechanism, and experimental box body 7.

[0049] A support leg 2 is fixedly installed at each of the four corners of the base plate 1. The support leg 2 is used to support the base plate 1 on the ground and to form a space between the base plate 1 and the ground.

[0050] The lever support plate 3 is rotatably supported on the top of the base plate 1 around the horizontal axis; in this embodiment, taking the base plate 1 as an example, the length direction of the base plate 1 is horizontal and parallel to the axis of the main shaft 5; the width direction of the base plate 1 is longitudinal and parallel to the horizontal axis; the thickness direction of the base plate 1 is vertical; the horizontal axis is perpendicular to both the axis of the main shaft 5 and the vertical direction.

[0051] Motor 4 is fixedly mounted on lever support plate 3. The output shaft of motor 4 is fixedly connected to one end of main shaft 5 to drive main shaft 5 to rotate. Motor 4 can be fixedly mounted on lever support plate 3 through motor support frame 23. Motor support frame 23 can be fixedly connected to motor 4 and lever support plate 3 through bolts. The output shaft of motor 4 and main shaft 5 can be connected through flexible coupling 24. The speed of motor 4 needs to reach 0 to 10,000 rpm and can maintain stable operation at 10,000 rpm. Motor 4 can be selected from Packer's NV310EAW product. The flexible coupling 24 can offset the thermal expansion generated by assembly and high-speed rotation of main shaft 5. In this embodiment, the diameter of output shaft of motor 4 can be 12 mm, the diameter of the connection section between main shaft 5 and motor 4 can be 24 mm, and the diameter of the middle section of main shaft 5 can be 35 mm.

[0052] The middle part of the main shaft 5 is rotatably supported by the lever support plate 3 via the bearing housing 6 and the bearing installed in the bearing housing 6, while the other end extends into the experimental chamber 7 and is fixedly installed with an inner bushing 8; Figure 4 As shown, the end of the main shaft 5 is provided with a central threaded hole, and the inner bushing 8 is provided with an external thread. The threaded part of the inner bushing 8 is screwed into the central threaded hole of the main shaft 5 to achieve a threaded connection. The detachable connection structure, such as the threaded connection between the inner bushing 8 and the main shaft 5, facilitates the replacement of the inner bushing 8 and enables experiments on different rolling bearings.

[0053] The bottom of the experimental chamber 7 is fixedly installed on the top surface of the base plate 1;

[0054] An inner ring 9 is fixedly installed on the outer periphery of the inner bushing 8; a circular groove is provided on the outer periphery of the inner ring 9; a glass outer ring 10 coaxial with the inner ring 9 is fixedly installed inside the experimental chamber 7; a plurality of balls 11 are evenly distributed in the annular space between the glass outer ring 10 and the circular groove; lubricating oil is filled between the balls 11 and the glass outer ring 10; the glass outer ring 10, the balls 11 and the inner ring 9 are used to simulate a rolling bearing; the glass outer ring 10 can be a sapphire ring; the balls 11 can be steel balls;

[0055] The top and sides of the experimental chamber 7 have windows 12 for easy observation. The top of the experimental chamber 7 can be provided with a rectangular window 12, and the left end cover 27 and the right end cover 34 can be installed on the sides respectively. An arc-shaped window 12 is provided on the right end cover 34.

[0056] The lever loading mechanism is installed on the base plate 1 and the lever bearing plate 3, and is used to provide radial loading force to the inner ring 9 through the lever bearing plate 3; for example Figure 2 , Figure 3 and Figure 4 As shown, the lever loading mechanism may include a gantry frame 13, a screw 14, a tension / compression sensor 15, a fisheye eye bolt 16, a steel wire 17, a spring 18, a lifting eye bolt 19, and a wing nut 20. The bottom end of the gantry frame 13 is fixedly installed on the end of the lever support plate 3 away from the experimental chamber 7. The top end of the tension / compression sensor 15 is suspended from the gantry frame 13 by the screw 14, and the bottom end is connected to the steel wire 17 by the fisheye eye bolt 16. A rotating shaft 21 is installed on the outer end of the base plate 1 on one side of the gantry frame 13. The rotation axis of the rotating shaft 21 is parallel to the horizontal axis of the lever support plate 3. The steel wire 17 passes around the rotating shaft 21 to achieve loading from the vertical direction to the horizontal direction. The direction changes; the other end of the steel wire 17 is connected to the spring 18, and the other end of the spring 18 is connected to the eye bolt 19; the other end of the eye bolt 19 passes through the connector 22 fixedly installed on the base plate 1 and is threadedly connected to the wing nut 20; when loading, the wing nut 20 is rotated, and the spring 18 is stretched through the eye bolt 19, and then the gantry frame 13 is pulled through the steel wire 17, the fish-eye eye screw 16 and the screw 14, so that the lever load plate 3 can rotate counterclockwise around the horizontal axis. Since the experimental box 7 is fixedly installed on the base plate, the outer glass ring 10 is fixed, and the inner ring 9 moves radially relative to the outer glass ring 10, so as to achieve radial loading on the inner ring 9.

[0057] The aforementioned high-speed rolling bearing lubrication test bench adopts a lever-type structure. A lever support plate 3, capable of rotating around a horizontal axis, is formed on the top of the base plate 1. The motor 4 and main shaft 5 are both mounted on the lever support plate 3. The test chamber 7 is fixedly mounted on the base plate 1. The end of the main shaft 5 extends into the test chamber 7, and an inner bushing 8 is installed on the end of the main shaft 5 inside the test chamber 7. A glass outer ring 10, balls 11, and inner ring 9 for simulating rolling bearings are mounted on the inner bushing 8. Windows 12 for easy observation are provided on the top and sides of the test chamber 7. A lever loading mechanism is installed on the base plate 1 and the lever support plate 3 to provide radial loading force to the inner ring 9 through the lever support plate 3. The high-speed rolling bearing lubrication test bench with the above-described structure can simulate the high-speed rotation of rolling bearings and achieve relatively accurate loading. The inner bushing 8 structure design ensures the accuracy retention of the main shaft 5 under multiple disassembly and assembly of the test bearing during actual use, reduces the difficulty of test bench debugging, and improves accuracy. At the same time, the innovative design of "overall lever structure" and "inner bushing 8-test bearing combination" reduces the overall size of the test bench, achieves accurate loading of the target bearing, improves the overall stability and accuracy of the test bench, and improves the operability of the test bench. The lubrication and operation of the rolling bearing can be easily observed through the window 12 and the outer glass ring 10 of the test chamber 7.

[0058] The lever loading mechanism described above can accurately measure the loading force through the tension and compression sensor 15, and achieve smooth force redirection by passing the steel wire 17 around the rotating shaft 21. The spring 18 can buffer the loading and make the loading force balanced and stable.

[0059] like Figure 4 As shown, the bearings inside the bearing housing 6 include deep groove ball bearings 25 facing each other along the axial direction of the main shaft 5 and a pair of parallel angular contact ball bearings 26. End caps 27 are fixedly connected to both ends of the bearing housing 6 along the axial direction of the main shaft 5, and each end cap 27 has a central hole through which the main shaft 5 passes. The deep groove ball bearings 25 and angular contact ball bearings 26 provide stable support for the main shaft 5, ensuring rotational accuracy. In actual assembly, the inner rings of the deep groove ball bearings 25 and angular contact ball bearings 26 can be axially limited by the shoulders of the main shaft 5, and the outer rings of the deep groove ball bearings 25 and angular contact ball bearings 26 can be axially limited by the outer bushings fitted inside the bearing housing 6. The inner and outer rings of the deep groove ball bearings 25 and angular contact ball bearings 26 can be axially limited by the end caps 27 fixedly installed at both ends of the bearing housing.

[0060] like Figure 1 and Figure 3As shown, the high-speed rolling bearing lubrication test bench also includes a protective pin 28; a connecting plate 29 is fixedly installed at one end of the lever support plate 3 facing the test chamber 7; the connecting plate 29 can be an inverted L-shaped structure, with its top end fixedly installed on the top surface of the lever support plate 3; a through hole is provided at the bottom end of the connecting plate 29, and the axis of the through hole is parallel to the horizontal axis; a connecting block 30 is fixedly installed on the top surface of the base plate 1, which is opposite to the position of the connecting plate 29; the connecting block 30 is provided with a pin hole coaxial with the through hole; the protective pin 28 is inserted into the through hole and the pin hole to keep the lever support plate 3 in a horizontal state.

[0061] The added protective pin 28 allows the lever load-bearing plate 3 to be kept horizontal by inserting it into the holes of the connecting block 30 and the connecting plate 29 when assembling the test bench or not conducting the test. To ensure balanced force on both sides, protective pins 28 can be symmetrically installed on both sides of the lever load-bearing plate 3.

[0062] like Figure 1 and Figure 3 As shown, pins 31 are symmetrically arranged on both sides of the base plate 1, and the pins 31 coincide with the horizontal axis; bearings 32 are sleeved on the outer ends of the pins 31; the lever load-bearing plate 3 is provided with rotating plates 33 corresponding to the pins 31; the rotating plates 33 are sleeved on the outer periphery of the bearings 32, and the rotating plates 33 on both sides and the bearings 32 form two fulcrums of the lever load-bearing plate 3.

[0063] The rotational engagement between the bearing 32 on the pin 31 and the rotating plate 33 enables the lever load-bearing plate 3 to rotate around the two pins 31 along the horizontal axis through the bearing 32 on the pin 31. This allows the lever load-bearing plate 3 to rotate around the two pins 31 under the action of the lever loading mechanism. When the lever loading mechanism is applied, as... Figure 4 The middle lever load plate 3 will rotate counterclockwise, and the main shaft 5 at one end of the inner bushing 8 will rotate upward, applying load to the inner ring 9 and through the ball bearings 11 to the outer glass ring 10, thereby loading the rolling bearing.

[0064] To facilitate the observation and recording of the rotation process of the rolling bearing, the aforementioned high-speed rolling bearing lubrication test bench also includes a microscope and a high-speed camera positioned opposite to window 12. The microscope and high-speed camera can record and photograph the fine structural and organizational changes during the rotation process of the rolling bearing, facilitating subsequent detailed analysis.

[0065] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-speed rolling bearing lubrication test bench, characterized in that, It includes a base plate, support legs, lever load-bearing plate, motor, main shaft, bearing box, lever loading mechanism, and experimental chamber; Each of the four corners of the base plate is fixedly installed with a support leg, which is used to support the base plate on the ground; The lever support plate is rotatably supported on the top of the base plate about a horizontal axis; The motor is fixedly mounted on the lever support plate, and the output shaft of the motor is fixedly connected to one end of the main shaft for driving the main shaft to rotate. The middle part of the main shaft is rotatably supported by the lever bearing plate through the bearing box and the bearing installed in the bearing box, and the other end extends into the experimental box and is fixedly installed with an inner shaft sleeve. The bottom of the experimental chamber is fixedly installed on the top surface of the base plate; An inner ring is fixedly installed on the outer circumference of the inner bushing; a circular groove is provided on the outer circumference surface of the inner ring. A glass outer ring, coaxial with the inner ring, is fixedly installed inside the experimental chamber; multiple balls are evenly distributed in the annular space between the glass outer ring and the circular groove; lubricating oil is filled between the balls and the glass outer ring; the glass outer ring, the balls, and the inner ring are used to simulate a rolling bearing; The experimental chamber has windows on its top and sides for easy observation; The lever loading mechanism is installed on the base plate and the lever bearing plate, and is used to provide radial loading force to the inner ring through the lever bearing plate; The lever loading mechanism includes a gantry frame, a screw, a tension / compression sensor, a fisheye eye screw, a steel wire, a spring, an eye bolt, and a wing nut; The bottom end of the gantry frame is fixedly installed at the end of the lever load-bearing plate away from the experimental chamber. The top end of the tension / compression sensor is suspended from the gantry frame by the screw, and the bottom end is connected to the steel wire by the fisheye eye screw. A pivot is installed at the outer end of the base plate on one side of the gantry frame; The rotation axis of the rotating shaft is set parallel to the horizontal axis of the lever bearing plate; The steel wire wraps around the pivot, thus changing from a vertical to a horizontal direction; The other end of the steel wire is connected to the spring, and the other end of the spring is connected to the eye bolt; The other end of the eye bolt passes through the connector fixedly installed on the base plate and is threadedly connected to the wing nut. During loading, the wing nut is rotated, the spring is stretched by the eye bolt, and the gantry is pulled by the steel wire, the fisheye eye screw and the screw, so that the lever load plate can rotate counterclockwise around the horizontal axis, thereby achieving radial loading on the inner ring.

2. The experimental platform as described in claim 1, characterized in that, The motor is fixedly mounted to the lever load-bearing plate via a motor support frame; The output shaft of the motor is connected to the main shaft by a flexible coupling. The bearings in the bearing housing include deep groove ball bearings axially opposite each other along the main shaft and a pair of parallel angular contact ball bearings; Along the axial direction of the main shaft, end caps are fixedly connected to both ends of the bearing housing, and the end caps are provided with a central hole through which the main shaft passes.

3. The experimental platform as described in claim 1, characterized in that, It also includes protective pins; A connecting plate is fixedly installed at one end of the lever bearing plate facing the experimental box. The bottom end of the connecting plate is provided with a through hole, and the axis of the through hole is parallel to the horizontal axis. A connecting block, which is positioned opposite to the connecting plate, is fixedly installed on the top surface of the base plate; The connecting block is provided with a pin hole coaxial with the through hole; The protective pin is inserted into the through hole and the pin hole to keep the lever load-bearing plate in a horizontal state.

4. The experimental platform as described in claim 3, characterized in that, The base plate is symmetrically provided with pins on both sides, and the pins coincide with the horizontal axis. A bearing is fitted onto the outer end of the pin. The lever bearing plate is equipped with a rotating plate that corresponds one-to-one with the pin; The rotating plate is sleeved on the outer periphery of the bearing, and the rotating plates on both sides and the bearing form two fulcrums of the lever load-bearing plate.

5. The experimental platform as described in claim 1, characterized in that, The outer ring of the glass is a sapphire ring.

6. The experimental platform as described in any one of claims 1-5, characterized in that, It also includes a microscope and a high-speed camera positioned opposite the window.

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