Automatic grease injection all-metal joint bearing swing wear experiment device and method

Abstract

The invention provides an automatic grease injection all-metal joint bearing swing wear experiment device and method, and relates to the technical field of bearing detection, and the device comprises a first bearing assembly, a second bearing assembly, a torque sensor, a loading plate, a mandrel, a to-be-detected bearing, a grease injection machine, a grease injection nozzle, an adapter flange, a swing oil cylinder and a controller; the first end of the core shaft is connected with the first bearing assembly, the core shaft is sleeved with an inner ring of a bearing to be tested, the second end of the core shaft is connected with the second bearing assembly, the second end of the core shaft is connected with the torque sensor through the adapter flange, and the torque sensor is connected with an output shaft of the swing oil cylinder; the loading plate acts on the outer ring of the to-be-tested bearing to apply a radial load to the outer ring of the to-be-tested bearing; a grease injection hole in the grease injection nozzle is communicated with a grease injection hole in an outer ring of the bearing to be detected, and the grease injection machine is communicated with the grease injection nozzle. According to the invention, automatic grease injection can be accurately carried out, and good lubrication of the bearing in the experiment process is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of bearing detection, and in particular to an automatic grease injection full-metal joint bearing swing wear test device and method. Background Art

[0002] The all-metal spherical plain bearing is composed of an outer ring (21) and an inner ring (22). The outer ring generally has grease injection holes and grease injection grooves. It is widely used in aerospace, engineering machinery, trucks, water conservancy facilities, etc. The all-metal spherical plain bearing can bear radial loads, axial loads, or combined loads of radial and axial loads at the same time, and has a certain range of self-aligning functions, such as Figure 3 shown.

[0003] The life of all-metal spherical bearings is an important parameter to pay attention to during the application of equipment, and its life is closely related to the lubrication status. When the lubrication is good, its service life can be greatly extended. Therefore, when evaluating the life of the bearings, it is necessary to maintain a good lubrication state of the all-metal spherical bearings. The existing methods often use manual or fixed greasing methods. Manual judgment is not only inaccurate, but also time-consuming and laborious. Fixed greasing is greasing once every set time, which may cause problems such as untimely greasing or excessive greasing quality. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic grease injection all-metal spherical bearing swing wear test device and method, which can accurately perform automatic grease injection and ensure good lubrication of the bearing during the experiment.

[0005] An automatic grease injection all-metal joint bearing swing wear test device, comprising: a first bearing assembly, a second bearing assembly, a torque sensor, a loading plate, a spindle, a bearing to be tested, a grease injection machine, a grease injection nozzle, an adapter flange, a swing 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 sleeved 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, and the torque sensor is connected to the output shaft of the swing cylinder;

[0007] The loading plate acts on the outer ring of the bearing to be tested to apply a radial load to the outer ring of the bearing to be tested; the grease injection nozzle is arranged in the loading plate, the grease injection hole on the grease injection nozzle is connected with the grease injection hole on the outer ring of the bearing to be tested, and the grease injection machine is connected with 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 core shaft to perform reciprocating motion at a set circumferential angle; the controller controls the magnitude of the radial load applied by the loading plate to the outer ring of the bearing to be tested; the torque sensor is used to obtain 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.

[0010] Optionally, the first bearing assembly includes a first bearing, a first support, a first end cover and a first cushion block;

[0011] The first cushion block is sleeved on the first end of the core shaft, the first bearing is sleeved on the first cushion block, and the first bearing is axially fixed on the first support through the first end cover.

[0012] Optionally, the second bearing assembly includes a second bearing, a second support, a second end cover and a second spacer;

[0013] The second cushion block is sleeved on the second end of the mandrel, the second bearing is sleeved on the second cushion block, and the second bearing is axially fixed on the second support through the second end cover;

[0014] The second end of the core shaft passes through the second end cover 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 pipe.

[0016] The present invention also provides a swing wear test method based on the above-mentioned automatic grease injection all-metal spherical bearing swing wear test device, which comprises:

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

[0018] The controller controls the swing cylinder to start, and drives the inner ring of the bearing to be tested to reciprocate at a set circumferential angle through the torque sensor, the adapter flange and the core shaft; the torque sensor obtains the friction torque of the bearing to be tested in real time and sends it to the controller;

[0019] The controller judges 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 is stopped, and the real-time friction torque of each reciprocating motion cycle is judged. If the friction torque is greater than the 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 continue the reciprocating motion. This process is repeated until the set test cycle is reached;

[0020] The average value of the maximum value of the friction torque in each cycle in 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 grease injection cycle is set to 80-120.

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

[0023] The effects of the present invention are as follows:

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

[0025] The swing wear test method of the present invention realizes fully automatic greasing during the life test of the all-metal spherical bearing, can automatically detect the change of the bearing friction torque, and automatically judge whether greasing is needed based on its change, thereby realizing fully automatic detection and fully automatic greasing during the test process, avoiding the problems of inaccurate and untimely judgment, high cost and low efficiency of manual greasing.

[0026] The swing wear test method of the present invention has high measurement accuracy and can accurately detect the change of the bearing friction torque and judge the lubrication state of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0029] Figure 3 It is a schematic diagram of the structure of a full metal spherical plain bearing.

[0030] In the figure: 1. first bearing assembly; 2. second bearing assembly; 3. torque sensor; 4. loading plate; 5. spindle; 6. bearing to be tested; 7. grease injection machine; 8. grease nozzle; 9. adapter flange; 10. swing cylinder; 11. controller; 12. first bearing; 13. first support; 14. first end cover; 15. first cushion block; 16. second bearing; 17. second support; 18. second end cover; 19. second cushion block; 20. grease injection tube; 21. outer ring; 22. inner ring. DETAILED DESCRIPTION

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

[0032] Figure 1It is a front view of the automatic grease injection all-metal spherical bearing swing wear test device of the present invention; Figure 2 This is a top view of the automatic grease injection all-metal spherical bearing swing wear test device of the present invention. Figure 1 and Figure 2 As shown, the present invention provides an automatic grease injection all-metal joint 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 core shaft 5, a bearing to be tested 6, a grease injection machine 7, a grease injection nozzle 8, an adapter flange 9, a swing cylinder 10 and a controller 11.

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

[0034] The loading plate 4 acts on the outer ring of the bearing 6 to be tested to apply a radial load to the outer ring of the bearing 6 to be tested; the grease nozzle 8 is arranged in the loading plate 4, the grease injection hole on the grease nozzle 8 is connected with the grease injection hole on the outer ring of the bearing 6 to be tested, and the grease injection machine 7 is connected with the grease injection nozzle 8. Preferably, the grease injection machine 7 is connected with the grease injection nozzle 8 through 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 core shaft 5 to perform reciprocating motion at a set circumferential angle; the controller 11 controls the magnitude of the radial load applied by the loading plate 4 to the outer ring of the bearing to be tested 6; the torque sensor 3 is used to obtain the friction torque of the bearing to be tested 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 cover 14 and a first spacer.

[0038] The first cushion block is sleeved on the first end of the core shaft 5 , the first bearing 12 is sleeved on the first cushion block, and the first bearing 12 is axially fixed on the first support 13 through the first end cover 14 .

[0039] The second bearing assembly 2 comprises a second bearing 15 , a first spacer 16 , a second support 17 , a second end cover 18 and a second spacer 19 .

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

[0041] The second end of the core shaft 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 swing wear test method based on the above-mentioned automatic grease injection all-metal spherical bearing swing wear test device, which comprises:

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

[0044] The controller controls the start of the swing cylinder, and drives the inner ring of the bearing to be tested to reciprocate at a set circumferential angle through the torque sensor, adapter flange and core shaft; the torque sensor obtains the friction torque of the bearing to be tested in real time and sends it to the controller.

[0045] The controller judges the cycle of reciprocating motion. If the cycle of reciprocating motion is less than or equal to the set grease injection cycle, the reciprocating motion continues. If the cycle of reciprocating motion is greater than the set cycle, the reciprocating motion stops, and the real-time friction torque of each reciprocating motion cycle is judged. If the friction torque is greater than the reference value, the controller controls the grease injection machine to inject grease into the bearing to be tested for the second set time and then continue to reciprocate, repeating this process until the set test cycle is reached. Specifically, the grease injection cycle is set to 80-120, preferably 100. The torque coefficient is 1.1-1.3, preferably 1.2.

[0046] The average value of the maximum value of the 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 a reference value.

[0047] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An automatic grease injection all-metal spherical bearing swing wear test device, characterized in that: It includes: A first bearing assembly, a second bearing assembly, a torque sensor, a loading plate, a spindle, a bearing to be tested, a grease injection machine, a grease injection nozzle, an adapter flange, a swing cylinder and a controller; The first end of the mandrel is connected to 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 to the second bearing assembly, and the second end of the mandrel is connected to the torque sensor through the adapter flange, and the torque sensor is connected to the output shaft of the swing cylinder; The loading plate acts on the outer ring of the bearing to be tested to apply a radial load to the outer ring of the bearing to be tested; the grease injection nozzle is arranged in the loading plate, the grease injection hole on the grease injection nozzle is connected with the grease injection hole on the outer ring of the bearing to be tested, and the grease injection machine is connected with the grease injection nozzle; The loading plate, the swing cylinder, the torque sensor and the grease injection machine are all connected to the controller; The controller controls the swing cylinder to drive the core shaft to perform reciprocating motion at a set circumferential angle; the controller controls the magnitude of the radial load applied by the loading plate to the outer ring of the bearing to be tested; the torque sensor is used to obtain 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 grease injection all-metal spherical bearing swing wear test device according to claim 1 is characterized in that: The first bearing assembly includes a first bearing, a first support, a first end cover and a first spacer; The first cushion block is sleeved on the first end of the core shaft, the first bearing is sleeved on the first cushion block, and the first bearing is axially fixed on the first support through the first end cover.

3. The automatic grease injection all-metal spherical bearing swing wear test device according to claim 1 is characterized in that: The second bearing assembly includes a second bearing, a second support, a second end cover and a second spacer; The second cushion block is sleeved on the second end of the mandrel, the second bearing is sleeved on the second cushion block, and the second bearing is axially fixed on the second support through the second end cover; The second end of the core shaft passes through the second end cover and is connected to the torque sensor via the adapter flange.

4. The automatic grease injection all-metal spherical bearing swing wear test device according to claim 1 is characterized in that: The grease injection machine is communicated with the grease injection nozzle through a grease injection pipe.

5. A swing wear test method based on the automatic grease injection all-metal spherical bearing swing wear test device according to any one of claims 1 to 4, characterized in that: It includes: The controller controls the grease injection machine to fill the tested bearing with grease, and the controller controls the loading plate to apply a set radial load to the outer ring of the tested bearing and maintain the load for a first set time; The controller controls the swing cylinder to start, and drives the inner ring of the bearing to be tested to reciprocate at a set circumferential angle through the torque sensor, the adapter flange and the core shaft; the torque sensor obtains the friction torque of the bearing to be tested in real time and sends it to the controller; The controller judges 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 is stopped, and the real-time friction torque of each reciprocating motion cycle is judged. If the friction torque is greater than the 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 continue the reciprocating motion. This process is repeated until the set test cycle is reached; The average value of the maximum value of the friction torque in each cycle in the set grease injection cycle is obtained, and the average value is multiplied by the torque coefficient to obtain the reference value.

6. The swing wear test method according to claim 5, characterized in that: The grease injection cycle is set to 80-120.

7. The swing wear test method according to claim 5, characterized in that: The moment coefficient is 1.1-1.3.

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