Automatic grease injection full metal plain bearing oscillation wear experimental device and method

Abstract

The application provides an automatic grease injection full-metal joint bearing swing wear experiment device and method, and relates to the technical field of bearing detection. The first end of the mandrel is connected with the first bearing assembly, the inner ring of the bearing to be detected is sleeved on the mandrel, the second end of the mandrel is connected with the second bearing assembly, and the second end of the mandrel is connected with the torque sensor through the adapter flange, the torque sensor is connected with the output shaft of the swing oil cylinder; the loading plate acts on the outer ring of the bearing to be detected to exert a radial load on the outer ring of the bearing to be detected; the grease injection hole on the grease injection nozzle is communicated with the grease injection hole on the outer ring of the bearing to be detected, and the grease injection machine is communicated with the grease injection nozzle. The application can accurately perform automatic grease injection and ensure good lubrication of the bearing during the experiment.

Description

Technical Field

[0001] This invention relates to the field of bearing testing technology, and in particular to an automatic grease-filled all-metal spherical bearing oscillation wear test device and method. Background Technology

[0002] All-metal spherical plain bearings consist of an outer ring (21) and an inner ring (22). The outer ring typically has a grease hole and a grease groove. They are widely used in aerospace, engineering machinery, heavy-duty trucks, and water conservancy facilities. All-metal spherical plain bearings can withstand radial loads, axial loads, or combined radial and axial loads, and have a certain range of self-aligning capabilities, such as… Figure 3 As shown.

[0003] The service life of all-metal spherical plain bearings is an important parameter to be monitored during equipment application. Its service life is closely related to the lubrication condition. When the lubrication is good, its service life can be greatly extended. Therefore, when evaluating the service life of bearings, it is necessary to maintain the good lubrication condition of all-metal spherical plain bearings. Existing methods often use manual or fixed grease injection. Manual methods are not only inaccurate in judgment, but also time-consuming and labor-intensive. Fixed grease injection is performed once at a set time, which has the problems of untimely grease injection or excessive grease quality. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic grease injection device and method for testing the oscillating wear of all-metal spherical bearings, which can accurately perform automatic grease injection and ensure good lubrication of the bearings during the test.

[0005] An automatic grease-injected all-metal spherical plain bearing oscillation wear test device includes: a first bearing assembly, a second bearing assembly, a torque sensor, a loading plate, a mandrel, the bearing to be tested, a grease injection machine, a grease injection nozzle, a transition flange, an oscillation cylinder, and a controller;

[0006] The first end of the mandrel is connected to the first bearing assembly, the inner ring of the bearing to be tested is fitted on the mandrel, the second end of the mandrel is connected to the second bearing assembly, and the second end of the mandrel is connected to the torque sensor through the adapter flange. The torque sensor is connected to the output shaft of the swing cylinder.

[0007] The loading plate applies a radial load to the outer ring of the bearing under test; the grease injection nozzle is disposed in the loading plate, the grease injection hole on the grease injection nozzle is connected to the grease injection hole on the outer ring of the bearing under test, and the grease injection machine is connected to the grease injection nozzle;

[0008] The loading plate, the swing cylinder, the torque sensor, and the grease injection machine are all connected to the controller;

[0009] The controller controls the swing cylinder to drive the spindle to perform a reciprocating motion at a set circumferential angle; the controller controls the loading plate to apply the radial load to the outer ring of the bearing under test; the torque sensor is used to acquire the friction torque of the bearing under test in real time and send it to the controller, and the controller controls the grease injection machine according to the friction torque.

[0010] Optionally, the first bearing assembly includes a first bearing, a first support, a first end cap, and a first pad.

[0011] The first pad is sleeved on the first end of the mandrel, the first bearing is sleeved on the first pad, and the first bearing is axially fixed to the first support by the first end cap.

[0012] Optionally, the second bearing assembly includes a second bearing, a second support, a second end cap, and a second pad.

[0013] The second pad is sleeved on the second end of the spindle, the second bearing is sleeved on the second pad, and the second bearing is axially fixed to the second support by the second end cover;

[0014] The second end of the mandrel passes through the second end cap and is connected to the torque sensor via the adapter flange.

[0015] Optionally, the grease injection machine is connected to the grease injection nozzle via a grease injection tube.

[0016] The present invention also provides a method for testing the oscillating wear of an all-metal spherical bearing based on the above-mentioned automatic grease injection oscillating wear testing device, which includes:

[0017] The controller controls the grease injection machine to fill the bearing under test with grease, and the controller controls the loading plate to apply a set radial load to the outer ring of the bearing under test and maintain it for a first set time.

[0018] The controller starts the swing cylinder, which drives the inner ring of the bearing under test to reciprocate at a set circumferential angle through the torque sensor, the adapter flange and the spindle; the torque sensor acquires the friction torque of the bearing under test in real time and sends it to the controller.

[0019] The controller determines the cycle of the reciprocating motion. If the cycle of the reciprocating motion is less than or equal to the set grease injection cycle, the reciprocating motion continues. If the cycle of the reciprocating motion is greater than the set cycle, the reciprocating motion stops. The controller also determines the real-time friction torque of each reciprocating motion cycle. If the friction torque is greater than the reference value, the controller controls the grease injection machine to inject grease into the bearing under test for a second set time and then continues the reciprocating motion. This process is repeated until the set test cycle is reached.

[0020] The average value of the maximum friction torque in each cycle within the set grease injection cycle is obtained, and the average value is multiplied by the torque coefficient to obtain the reference value.

[0021] Optionally, the set grease injection cycle is 80-120.

[0022] Optionally, the torque coefficient is 1.1-1.3.

[0023] The effects of this invention are as follows:

[0024] The present invention provides an automatic grease injection all-metal joint bearing swing wear test device, which has a simple and compact structure, is easy to assemble, and can greatly improve the efficiency of automatic grease injection life test of all-metal joints.

[0025] The present invention provides a swing wear test method that enables fully automated grease injection during the life test of all-metal spherical bearings. It can automatically detect changes in bearing friction torque and determine whether grease injection is needed based on these changes. This achieves fully automated detection and grease injection during the test process, avoiding the problems of inaccurate and untimely judgment, high cost, and low efficiency associated with manual grease injection.

[0026] The oscillating wear test method of this invention has high measurement accuracy and can accurately detect changes in bearing friction torque to determine the bearing lubrication status. Attached Figure Description

[0027] Figure 1 This is a front view of the automatic grease-injection all-metal spherical bearing oscillation wear test device of the present invention;

[0028] Figure 2 This is a top view of the automatic grease injection all-metal spherical bearing oscillation wear test device of the present invention;

[0029] Figure 3 This is a schematic diagram of an all-metal spherical bearing.

[0030] In the diagram: 1. First bearing assembly; 2. Second bearing assembly; 3. Torque sensor; 4. Loading plate; 5. Mandrel; 6. Bearing under test; 7. Grease injection machine; 8. Grease injection nozzle; 9. Adapter flange; 10. Swing cylinder; 11. Controller; 12. First bearing; 13. First support; 14. First end cap; 15. First pad; 16. Second bearing; 17. Second support; 18. Second end cap; 19. Second pad; 20. Grease injection pipe; 21. Outer ring; 22. Inner ring. Detailed Implementation

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0032] Figure 1This is a front view of the automatic grease-injection all-metal spherical bearing oscillation wear test device of the present invention; Figure 2 This is a top view of the automatic grease-injection all-metal spherical bearing oscillation wear test device of the present invention. Figure 1 and Figure 2 As shown, the present invention provides an automatic grease-injected all-metal spherical bearing swing wear test device, which includes: a first bearing assembly 1, a second bearing assembly 2, a torque sensor 3, a loading plate 4, a mandrel 5, a bearing to be tested 6, a grease injection machine 7, a grease injection nozzle 8, a transition flange 9, a swing cylinder 10, and a controller 11.

[0033] The first end of the spindle 5 is connected to the first bearing assembly 1. The inner ring of the bearing 6 to be tested is fitted on the spindle 5. The second end of the spindle 5 is connected to the second bearing assembly 2. The second end of the spindle 5 is connected to the torque sensor 3 through the adapter flange 9. The torque sensor 3 is connected to the output shaft of the swing cylinder 10.

[0034] The loading plate 4 applies a radial load to the outer ring of the bearing 6 under test. A grease injection nozzle 8 is disposed within the loading plate 4, and the grease injection hole on the nozzle 8 communicates with the grease injection hole on the outer ring of the bearing 6 under test. The grease injection machine 7 is connected to the grease injection nozzle 8. Preferably, the grease injection machine 7 is connected to the grease injection nozzle 8 via a grease injection pipe 20.

[0035] The loading plate 4, the swing cylinder 10, the torque sensor 3, and the grease injection machine 7 are all connected to the controller 11.

[0036] The controller 11 controls the swing cylinder 10 to drive the spindle 5 to perform a reciprocating motion at a set circumferential angle; the controller 11 controls the loading plate 4 to apply the radial load to the outer ring of the bearing under test 6; the torque sensor 3 is used to acquire the friction torque of the bearing under test 6 in real time and send it to the controller 11, and the controller 11 controls the grease injection machine 7 according to the friction torque.

[0037] Specifically, the first bearing assembly 1 includes a first bearing 12, a first support 13, a first end cap 14, and a first pad.

[0038] The first pad is fitted onto the first end of the spindle 5, the first bearing 12 is fitted onto the first pad, and the first bearing 12 is axially fixed onto the first support 13 by the first end cover 14.

[0039] The second bearing assembly 2 includes a second bearing 15, a first pad 16, a second support 17, a second end cap 18, and a second pad 19.

[0040] The second pad 19 is sleeved on the second end of the spindle 5, and the second bearing 15 is the first pad; 16 is sleeved on the second pad 19, and the second bearing 15 is the first pad; 16 is axially fixed on the second support 17 through the second end cover 18.

[0041] The second end of the spindle 5 passes through the second end cover 18 and is connected to the torque sensor 3 via the adapter flange 9.

[0042] The present invention also provides a method for testing the oscillating wear of an all-metal spherical bearing based on the above-mentioned automatic grease injection oscillating wear testing device, which includes:

[0043] The controller controls the grease injection machine to fill the bearing under test with grease, and the controller controls the loading plate to apply a set radial load to the outer ring of the bearing under test and maintain it for a first set time.

[0044] The controller starts the swing cylinder, which drives the inner ring of the bearing under test to reciprocate at a set circumferential angle through the torque sensor, adapter flange and spindle; the torque sensor acquires the friction torque of the bearing under test in real time and sends it to the controller.

[0045] The controller determines the cycle of the reciprocating motion. If the cycle is less than or equal to the set grease injection cycle, the reciprocating motion continues. If the cycle is greater than the set cycle, the reciprocating motion stops. The controller also determines the real-time friction torque for each reciprocating motion cycle. If the friction torque is greater than a reference value, the controller controls the grease injection machine to inject grease into the bearing under test for a second set time, and then continues the reciprocating motion. This process is repeated until the set test cycle is reached. Specifically, the set grease injection cycle is 80-120 cycles, preferably 100 cycles. The torque coefficient is 1.1-1.3, preferably 1.2.

[0046] Obtain the average value of the maximum friction torque in each cycle within the set grease injection cycle, and multiply the average value by the torque coefficient to obtain the reference value.

[0047] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An automatic grease injection full metal plain bearing oscillation wear test device, characterized by, It includes: The first bearing assembly, the second bearing assembly, the torque sensor, the loading plate, the mandrel, the bearing to be tested, the grease injection machine, the grease injection nozzle, the adapter flange, the swing oil cylinder and the controller; The first end of the mandrel is connected with the first bearing assembly, the inner ring of the bearing to be tested is sleeved on the mandrel, the second end of the mandrel is connected with the second bearing assembly, and the second end of the mandrel is connected with the torque sensor through the adapter flange, and the torque sensor is connected with the output shaft of the swing oil cylinder; The loading plate acts on the outer ring of the bearing to be tested to apply radial load to the outer ring of the bearing to be tested; the grease injection nozzle is arranged in the loading plate, a grease injection hole on the grease injection nozzle is communicated with a grease injection hole on the outer ring of the bearing to be tested, and the grease injection machine is communicated with the grease injection nozzle; The loading plate, the swing oil cylinder, the torque sensor and the grease injection machine are connected with the controller; The controller controls the swing oil cylinder to drive the mandrel to reciprocate by a set angle in the circumferential direction; the controller controls the size of the radial load applied to the outer ring of the bearing to be tested by the loading plate; the torque sensor is used to acquire the friction torque of the bearing to be tested in real time and send it to the controller, and the controller controls the grease injection machine according to the friction torque.

2. The automatic greasing full metal plain bearing oscillation wear test device according to claim 1, characterized in that The first bearing assembly includes a first bearing, a first support, a first end cover and a first pad; The first pad is sleeved on the first end of the mandrel, the first bearing is sleeved on the first pad, and the first bearing is axially fixed on the first support through the first end cover.

3. The automatic grease injection full metal plain bearing oscillation wear test device according to claim 1, characterized in that The second bearing assembly includes a second bearing, a second support, a second end cover and a second pad; The second pad is sleeved on the second end of the mandrel, the second bearing is sleeved on the second pad, and the second bearing is axially fixed on the second support through the second end cover; The second end of the mandrel passes through the second end cover and is connected with the torque sensor through the adapter flange.

4. The automatic greasing full metal plain bearing oscillation wear test device according to claim 1, characterized in that The grease injection machine is communicated with the grease injection nozzle through a grease injection pipe.

5. A method for oscillation wear test based on the oscillation wear test device for full metal plain bearing with automatic lubrication according to any one of claims 1-4, characterized in that, It includes: The controller controls the grease injection machine to fill the bearing to be tested with grease, controls the loading plate to apply a set radial load to the outer ring of the bearing to be tested and keep for a first set time; The controller controls the swing oil cylinder to start, drives the inner ring of the bearing to be tested to reciprocate by a set angle in the circumferential direction through the torque sensor, the adapter flange and the mandrel; the torque sensor acquires the friction torque of the bearing to be tested in real time and sends it to the controller; The controller judges the period of reciprocation, if the period of reciprocation is less than or equal to a set grease injection period, the reciprocation continues, if the period of reciprocation is greater than the set grease injection period, the reciprocation stops, and the friction torque of each reciprocation period is judged in real time, if the friction torque is greater than a reference value, the controller controls the grease injection machine to inject grease into the bearing to be tested for a second set time and then continues the reciprocation, and the process is repeated until a set test period is reached. An average value of maximum values of friction torques in each period in the set grease injection period is obtained, and the average value is multiplied by a torque coefficient to obtain the reference value.

6. The oscillating wear test method according to claim 5, wherein The set grease injection period is 80-120.

7. The oscillating wear test method of claim 5, wherein, The torque coefficient is 1.1-1.3.

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