A bearing conductive grease endurance test apparatus

Abstract

The utility model discloses a bearing conductive grease guide durability test equipment, include: base, rotating roller, rotatablely set up in the base, drive mechanism is used for driving rotating roller rotation, bearing to be measured, bearing to be measured is sleeved in rotating roller outer periphery, first bearing cover, first bearing cover is sleeved in bearing to be measured outside, pressure mechanism is located on the base, is used for exerting pressure to rotating roller, and pressure mechanism applies load to rotating roller, and makes bearing to be measured bear changing radial load, voltage test circuit, its anode and rotating roller electricity are connected, and cathode and first bearing cover electricity are connected, to form the electric circuit between the inner ring and the outer ring of bearing to be measured, is used for detecting and outputting the voltage change value between the both ends of bearing to be measured. The utility model can real -time, sensitive monitoring bearing internal conductive grease conductivity durability, more accurately, effectively assess product quality and service life.

Description

Technical Field

[0001] This utility model relates to the field of mechanical component performance testing technology, and in particular to a bearing conductive grease conductive durability testing device. Background Technology

[0002] Rolling bearings are core components in rotating machinery, and their performance and reliability directly affect the service life of the entire equipment. In certain applications, conductive lubricating grease is used inside the bearing to prevent electro-corrosion damage caused by current passing through the bearing raceway. This conductive grease forms a conductive path between the inner and outer rings of the bearing, safely discharging stray current and thus protecting the bearing raceway surface. However, the conductivity of the conductive grease changes with long-term bearing operation. Under the influence of mechanical shearing, high temperature, and aging, the distribution and contact state of the conductive filler in the grease will change, potentially leading to a decrease in conductivity or even failure. Once conductivity is lost, the bearing will face the risk of electro-corrosion, leading to premature failure.

[0003] Currently, the evaluation of conductive greases mainly focuses on static resistivity measurements or placing the bearing in a simple energized circuit to observe whether it conducts. However, static tests cannot reflect the decay process of the conductive grease's conductivity under dynamic conditions such as continuous rotation, load bearing, and temperature changes. Moreover, the above tests can usually only determine "continuity" or "discontinuity" and cannot accurately capture the gradual change in conductivity before failure, making it difficult to effectively predict the durability of the grease.

[0004] Therefore, there is an urgent need in this field for a dedicated testing device that can simulate the actual operating conditions of bearings and monitor the conductivity and durability of their internal conductive greases in real time and with high sensitivity, so as to more accurately and efficiently evaluate the product quality and service life of conductive greases. Utility Model Content

[0005] The purpose of this invention is to provide a bearing conductive grease durability testing device that can monitor the conductivity and durability of the conductive grease inside the bearing in real time and with high sensitivity, and to more accurately and effectively evaluate product quality and service life.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a bearing conductive grease durability testing device, comprising: Base; A rotating roller is rotatably disposed within the base; A drive mechanism is used to drive the rotating roller to rotate; The bearing to be tested is sleeved on the outer circumference of the rotating roller; A first bearing sleeve is fitted over the outside of the bearing to be tested; A pressure-applying mechanism, located on the base, is used to apply pressure to the rotating roller. The pressure-applying mechanism applies a load to the rotating roller, causing the bearing under test to bear a varying radial load. The voltage testing circuit has its positive terminal electrically connected to the rotating roller and its negative terminal electrically connected to the first bearing sleeve, so as to form an electrical circuit between the inner and outer rings of the bearing under test, and is used to detect and output the voltage change value between the two ends of the bearing under test.

[0007] By adopting the above technical solution, the stress state of the bearing under test under real working conditions is simulated, thereby more accurately evaluating the performance of conductive grease in durability testing. Moreover, it can detect voltage changes in real time, reflecting the conductivity and durability of conductive grease, and improving the reliability and accuracy of the test.

[0008] A further feature of this invention is that the driving mechanism includes a motor and a pulley mechanism, wherein the motor and the rotating roller are connected through the pulley mechanism.

[0009] By adopting the above technical solution, the transmission is smooth, the noise is low, and the speed of the rotating roller is easy to adjust, so as to meet the needs of different testing conditions.

[0010] A further feature of this invention is that a pressure bearing corresponding to the position of the pressure applying mechanism is fitted on the rotating roller, and the pressure applying mechanism applies a radial load to the bearing under test through the pressure bearing.

[0011] By adopting the above technical solution, the load distribution is more uniform, avoiding local wear on the bearing under test and improving the stability of the test. At the same time, the pressure bearing can also protect the roller and increase the overall service life of the component.

[0012] A further feature of this invention is that the pressure-applying mechanism includes a cylinder assembly and a second drive mechanism that is pulsatorically connected to the cylinder assembly. The cylinder assembly includes a cylinder head, and the second drive mechanism drives the cylinder head to move toward the pressure bearing.

[0013] By adopting the above technical solution, the displacement and pressure of the cylinder head can be precisely controlled, controllable load changes can be achieved, and radial loads under different working conditions can be simulated. Moreover, the cylinder assembly has a fast response speed and a wide pressure adjustment range, which enhances the flexibility of the test.

[0014] A further feature of this invention is that the cylinder assembly is disposed on the top of the base, the top of the base has a first opening, and the cylinder head abuts against the pressure bearing through the first opening.

[0015] By adopting the above technical solution, the structure is compact, reducing the space occupied by the equipment. This layout makes the pressure direction perpendicular to the rotating roller, ensuring that the load is directly transmitted to the bearing under test, thus improving the accuracy and efficiency of the test.

[0016] A further feature of this invention is that it includes a worktable on which the base, the motor, the pulley mechanism, the voltage testing circuit, and the cylinder assembly are placed. The base and the motor are arranged along the length of the worktable, the pulley mechanism, the base, and the voltage testing circuit are arranged along the width of the worktable, and the pulley mechanism and the voltage testing circuit are respectively located on both sides of the base. The cylinder assembly and the base are arranged along the height of the worktable, and the cylinder assembly is located above the base.

[0017] By adopting the above technical solution, the layout is reasonable, space utilization is optimized, and operation and maintenance are convenient. In addition, the voltage test circuit and the pulley mechanism are placed on opposite sides of the base, which reduces electrical interference and improves the accuracy of test data.

[0018] A further feature of this invention is that: the base is provided with second openings on both sides along the axial direction of the rotating roller; a second bearing is fitted on the end of the rotating roller away from the bearing to be tested; a second bearing sleeve is provided on the inner ring of the second bearing; the second bearing sleeve is fitted on the rotating roller; and the outer ring contour of the second bearing fits with the contour of one of the second openings.

[0019] By adopting the above technical solution, one end of the rotating roller is supported by a second bearing and a second bearing sleeve, which makes the installation and disassembly of the rotating roller more convenient and improves the maintainability of the equipment. In addition, the second bearing fits snugly against the contour of the second opening, which enhances the stability of the rotating roller and reduces vibration during the test.

[0020] A further feature of this invention is that the bearing to be tested and the second bearing are respectively located at the second openings on both sides of the base, the outer ring contour of the first bearing sleeve fits the contour of the other second opening, and an end cap is fixedly connected to one end of the base near the other second opening, the end cap covering the end face of the first bearing sleeve.

[0021] By adopting the above technical solution, the other end of the roller is supported by the bearing to be tested and the first bearing sleeve, making the installation and disassembly of the roller more convenient. The end cover seals the first bearing sleeve and the gap between the first bearing sleeve and the bearing to be tested, preventing external contaminants from entering and ensuring the cleanliness of the testing environment.

[0022] A further feature of this invention is that a third opening is provided through the base, and the third opening corresponds to the position of the pressure bearing and the cylinder pressure head.

[0023] By adopting the above technical solution, the relative positional relationship between the cylinder pressure head and the pressure bearing can be observed, so as to adjust the pressure position, enhance the operability of the equipment, and facilitate the observation and maintenance of the rotating roller and the bearing under test inside the base.

[0024] In summary, this utility model has the following beneficial effects: The method involves applying a load to the rotating roller while the drive mechanism drives it to rotate, causing the bearing under test to bear a varying radial load. The voltage change between the two ends of the bearing under test is detected by a voltage testing circuit, simulating the stress state of the bearing under test under real working conditions. This allows for a more accurate evaluation of the performance of conductive grease in durability testing. Furthermore, the method can detect voltage changes in real time, reflecting the conductivity and durability of the conductive grease, thus improving the reliability and accuracy of the test. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention.

[0026] Figure 2 This is a perspective view of the present invention from another angle.

[0027] Figure 3 This is a perspective view of the present invention without the base.

[0028] Figure 4 This is a cross-sectional view of the present invention.

[0029] Figure 5 This is a schematic diagram of the base of this utility model.

[0030] In the diagram: 1. Base; 11. First opening; 12. Second opening; 13. Third opening; 2. Drive mechanism; 21. Motor; 22. Pulley mechanism; 3. Rotary roller; 41. Bearing to be tested; 42. First bearing sleeve; 51. Cylinder assembly; 511. Cylinder pressure head; 6. Worktable; 71. Second bearing; 72. Second bearing sleeve; 73. End cap; 8. Pressure bearing; 91. Negative connection point; 92. Positive connection point. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] A bearing conductive grease conductivity durability testing device, such as Figure 1-5 As shown, it includes: Base 1; Drive mechanism 2; The rotating roller 3 is rotatably disposed within the base 1 and is connected to the drive mechanism 2 via transmission. The bearing to be tested 41 is sleeved on the outer periphery of the rotating roller 3, that is, the rotating roller 3 is in contact with the inner ring of the bearing to be tested 41. The first bearing sleeve 42 is sleeved on the outside of the bearing 41 to be tested, that is, the first bearing sleeve 42 is in contact with the outer ring of the bearing 41 to be tested. Voltage test circuit, as shown in the attached diagram Figure 4 As shown, A represents the area where the voltage testing circuit is located. Its positive terminal is electrically connected to the rotating roller 3, and its negative terminal is electrically connected to the first bearing sleeve 42, i.e., attached... Figure 4 In the diagram, 91 represents the negative connection point of the voltage testing circuit, and 92 represents the positive connection point of the voltage testing circuit, forming an electrical circuit between the inner and outer rings of the bearing 41 under test. The preferred power supply voltage in this circuit is 12 V, and the preferred resistance is 60 Ω. A voltmeter is used to measure the voltage between the inner and outer rings of the bearing 41 under test. The circuit wiring is a conventional technique and will not be elaborated upon here. If the resistance of the bearing 41 under test is high, the voltmeter reading will be high; if the resistance of the bearing 41 under test is low, the voltmeter reading will be low. The lower the resistance, the better the conductivity of the grease; this is a basic principle of Ohm's Law. The pressure application mechanism, located on the base 1, is used to apply pressure to the rotating roller 3. The pressure applied to the rotating roller 3 is transmitted to the bearing under test 41 to simulate the stress state of the bearing under test 41 under real working conditions.

[0033] When the driving mechanism 2 drives the rotating roller 3 to rotate, the pressure applying mechanism applies a load to the rotating roller 3, causing the bearing under test 41 to bear a changing radial load. The voltage test circuit detects the voltage change between the two ends of the bearing under test 41. This structural design simulates the stress state of the bearing under test 41 under real working conditions, thereby more accurately evaluating the performance of conductive grease in durability testing. Furthermore, it can detect voltage changes in real time, reflecting the conductivity and durability of the conductive grease, thus improving the reliability and accuracy of the test.

[0034] Preferably, the drive mechanism 2 includes a motor 21 and a pulley mechanism 22. The pulleys in the pulley mechanism 22 are connected to the motor 21 and the shaft of the rotating roller 3, respectively. The pulley connected to the shaft of the motor 21 is the driving pulley, and the pulley connected to the shaft of the rotating roller 3 is the driven pulley. The motor 21 drives the rotating roller 3 to rotate through the pulley mechanism 22. With the above structural design, the transmission is smooth, the noise is low, and the speed of the rotating roller 3 is easy to adjust to meet the needs of different testing conditions.

[0035] Preferably, a pressure bearing 8 corresponding to the position of the pressure applying mechanism is fitted on the rotating roller 3, and the pressure applying mechanism applies a radial load to the bearing 41 under test through the pressure bearing 8. This structural design makes the load distribution more uniform, avoids direct localized wear on the bearing 41 under test, and improves the stability of the test. At the same time, the pressure bearing 8 also protects the rotating roller 3, increasing the overall service life of the components.

[0036] Preferably, the pressure applying mechanism includes a cylinder assembly 51 and a second drive mechanism (not shown in the figure) that is drively connected to the cylinder assembly 51. The cylinder assembly 51 is bolted to the base 1. The second drive structure is preferably an air compressor, an air tank, a solenoid valve, etc. The air compressor generates high-pressure gas through piston movement. After being stabilized by the air tank, the gas enters the cylinder through the control of the solenoid valve, pushing the piston to move linearly. This is a conventional technical means of cylinder drive and will not be described in detail here. The cylinder assembly 51 includes a cylinder head 511. The second drive mechanism drives the cylinder head 511 to move towards the pressure bearing 8. Through the above structural design, the displacement and pressure of the cylinder head 511 can be precisely controlled to achieve controllable load changes and simulate radial loads under different working conditions. Moreover, the cylinder assembly 51 has a fast response speed and a wide pressure adjustment range, which enhances the flexibility of the test.

[0037] Preferably, the cylinder assembly 51 is disposed on the top of the base 1, and the top of the base 1 is provided with a first opening 11. The cylinder pressure head 511 abuts against the pressure bearing 8 through the first opening 11. Through the above structural design, the structure is compact, reducing the space occupied by the equipment. This layout makes the pressure direction perpendicular to the rotating roller 3, ensuring that the load is directly transmitted to the bearing 41 under test, thereby improving the accuracy and efficiency of the test.

[0038] Preferably, the system further includes a worktable 6 for housing the base 1, the motor 21, the pulley mechanism 22, the voltage testing circuit, and the cylinder assembly 51. The base 1 and the motor 21 are bolted to the surface of the worktable 6. The base 1 and the motor 21 are arranged along the length of the worktable 6. The pulley mechanism 22, the base 1, and the voltage testing circuit are arranged along the width of the worktable 6, with the pulley mechanism 22 and the voltage testing circuit located on opposite sides of the base 1. The cylinder assembly 51 is arranged along the height of the worktable 6, with the cylinder assembly 51 positioned above the base 1. The length, width, and height of the worktable 6 are perpendicular to each other. This structural design provides a reasonable layout, optimizes space utilization, and facilitates operation and maintenance. Furthermore, the separate placement of the voltage testing circuit and the pulley mechanism 22 on opposite sides of the base 1 reduces electrical interference and improves the accuracy of the test data.

[0039] Preferably, the base 1 has second openings 12 on both sides along the axial direction of the roller 3. A second bearing 71 is fitted onto the end of the roller 3 away from the bearing 41 to be tested. A second bearing sleeve 72 is provided on the inner ring of the second bearing 71. The second bearing sleeve 72 is fitted onto the roller 3, and the outer ring contour of the second bearing 71 fits into the contour of one of the second openings 12. Through the above structural design, one end of the roller 3 is supported by the second bearing 71 and the second bearing sleeve 71, making the installation and disassembly of the roller 3 more convenient and improving the maintainability of the equipment. In addition, the fit between the second bearing 71 and the contour of the second opening 12 enhances the stability of the roller 3 and reduces vibration during the testing process.

[0040] Preferably, the bearing to be tested 41 and the second bearing 71 are respectively located at the second openings 12 on both sides of the base 1. The outer ring contour of the first bearing sleeve 42 fits the contour of the other second opening 12. An end cap 73 is fixedly connected to one end of the base 1 near the other second opening 12, and the end cap 73 covers the end face of the first bearing sleeve 42. With the above structural design, the other end of the roller 3 is supported by the bearing to be tested 41 and the first bearing sleeve 42, making the installation and disassembly of the roller 3 more convenient. The end cap 73 seals the first bearing sleeve 42 and the gap between the first bearing sleeve 42 and the bearing to be tested 41, preventing external contaminants from entering and ensuring the cleanliness of the testing environment.

[0041] Preferably, a third opening 13 is provided through the base 1, extending along the length of the worktable 6. The third opening 13 corresponds to the positions of the pressure bearing 8 and the cylinder pressure head 511. The third opening 13 allows for observation of the relative positions of the cylinder pressure head 511 and the pressure bearing 8, facilitating adjustment of the pressure application position and enhancing the operability of the equipment. It also facilitates the observation and maintenance of the rotating roller 3 and the bearing 41 under test inside the base 1.

[0042] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A bearing conductive grease conductivity durability testing device, characterized in that, include: Base (1); The rotating roller (3) is rotatably disposed within the base (1); The drive mechanism (2) is used to drive the rotating roller (3) to rotate; The bearing to be tested (41) is sleeved on the outer circumference of the rotating roller (3); The first bearing sleeve (42) is sleeved on the outside of the bearing (41) to be tested; A pressure-applying mechanism, located on the base (1), is used to apply pressure to the rotating roller (3). The pressure-applying mechanism applies a load to the rotating roller (3) so that the bearing (41) under test is subjected to a changing radial load. The voltage testing circuit has its positive terminal electrically connected to the rotating roller (3) and its negative terminal electrically connected to the first bearing sleeve (42) to form an electrical circuit between the inner and outer rings of the bearing under test (41) for detecting and outputting the voltage change value between the two ends of the bearing under test (41).

2. The bearing conductive grease conductivity durability testing device according to claim 1, characterized in that: The drive mechanism (2) includes a motor (21) and a pulley mechanism (22), and the motor (21) is connected to the roller (3) through the pulley mechanism (22).

3. The bearing conductive grease durability testing device according to claim 2, characterized in that: The roller (3) is fitted with a pressure bearing (8) corresponding to the position of the pressure applying mechanism, and the pressure applying mechanism applies a radial load to the bearing (41) to be tested through the pressure bearing (8).

4. The bearing conductive grease conductivity durability testing device according to claim 3, characterized in that: The pressure application mechanism includes a cylinder assembly (51) and a second drive mechanism that is pulverizedly connected to the cylinder assembly (51). The cylinder assembly (51) includes a cylinder head (511), and the second drive mechanism drives the cylinder head (511) to move toward the pressure bearing (8).

5. The bearing conductive grease conductivity durability testing device according to claim 4, characterized in that: The cylinder assembly (51) is disposed on the top of the base (1), and the top of the base (1) is provided with a first opening (11). The cylinder head (511) abuts against the pressure bearing (8) through the first opening (11).

6. The bearing conductive grease conductivity durability testing device according to claim 4, characterized in that: It also includes a worktable (6) for placing the base (1), the motor (21), the pulley mechanism (22), the voltage testing circuit, and the cylinder assembly (51). The base (1) and the motor (21) are arranged along the length direction of the worktable (6). The pulley mechanism (22), the base (1), and the voltage testing circuit are arranged along the width direction of the worktable (6). The pulley mechanism (22) and the voltage testing circuit are located on both sides of the base (1). The cylinder assembly (51) and the base (1) are arranged along the height direction of the worktable (6). The cylinder assembly (51) is located above the base (1).

7. The bearing conductive grease durability testing device according to claim 1, characterized in that: The base (1) has a second opening (12) on both sides along the axial direction of the roller (3). The roller (3) is fitted with a second bearing (71) at one end away from the bearing (41) to be tested. The inner ring of the second bearing (71) is provided with a second bearing sleeve (72). The second bearing sleeve (72) is fitted on the roller (3). The outer ring contour of the second bearing (71) fits with the contour of one of the second openings (12).

8. The bearing conductive grease conductivity durability testing device according to claim 7, characterized in that: The bearing to be tested (41) and the second bearing (71) are respectively located at the second opening (12) on both sides of the base (1). The outer ring contour of the first bearing sleeve (42) fits the contour of the other second opening (12). An end cap (73) is fixedly connected to one end of the base (1) near the other second opening (12). The end cap (73) covers the end face of the first bearing sleeve (42).

9. The bearing conductive grease conductivity durability testing device according to claim 4, characterized in that: A third opening (13) is provided through the base (1), and the third opening (13) corresponds to the position of the pressure bearing (8) and the cylinder head (511).

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