A rolling bearing lubrication contaminant testing device

Abstract

A rolling bearing lubrication contaminant testing device relates to the field of bearing lubrication testing technology. To address the problems of existing testing equipment where the lubrication system contains a filter, preventing the mixing of contaminants within the system, and the inability to restore the filter after removal, as well as significant errors in experimental data due to limitations in the amount of contaminants added and the internal structure of the testing equipment, this invention employs two spaced-apart agitator bushings in the testing shaft system. This thoroughly mixes solid contaminants in the oil before lubrication of the test bearing. A primary oil return hole on the load body prevents the loss of solid contaminants, thus simulating the actual working conditions of lubrication contaminants. A secondary oil return pipe in the center of the upper surface of the base prevents damage to the lubrication system from solid contaminants. This device ensures stable operation of the lubrication system while meeting the testing conditions, thereby guaranteeing the accuracy of the test. This invention is applicable to bearing lubrication testing.

Description

Technical Field

[0001] This invention relates to the field of bearing lubrication testing technology, and specifically to a rolling bearing lubrication contaminant testing device. Background Technology

[0002] Bearings require a certain amount of lubricating oil for lubrication and cooling during operation, thus necessitating high cleanliness of the lubricating oil. Bearing contaminant testing is based on a bearing failure mode, specifically the mechanical failure caused when the particulate matter content in the lubricating oil exceeds the bearing's tolerance limit. The test has two main objectives: one is to investigate the impact of different particle sizes on bearing life, and the other is to determine the bearing's failure development patterns. Both tests require sufficient sample capacity and testing time, which current testing equipment lacks due to its inadequate lubrication system, making such tests impossible.

[0003] Furthermore, simply removing the filter from the lubrication system of the tester and forcibly conducting the bearing contaminant test will cause irreparable damage to the lubrication system. Due to the structural limitations of the lubrication system, if too little contaminant is added, the expected test effect will not be achieved; if too much contaminant is added, the lubrication system will fail before the test bearing, leading to test failure.

[0004] In summary, the existing testing equipment has a filter in its lubrication system, which cannot mix contaminants into the lubrication system. If the filter in the lubrication system is removed, the testing equipment cannot be restored. Furthermore, due to the amount of contaminants added and the limitations of the internal structure of the testing equipment, there are large errors in the experimental data during the test, which may even lead to test failure in severe cases. Summary of the Invention

[0005] This invention addresses the problems of existing testing equipment with filters in their lubrication systems, which prevent contaminants from being mixed into the lubrication system. Removing the filters makes it impossible to restore the testing equipment. Furthermore, the amount of contaminants added and the limitations of the internal structure of the testing equipment lead to significant errors in experimental data, sometimes resulting in test failure. Therefore, this invention proposes a rolling bearing lubrication contaminant testing device.

[0006] The present invention provides a rolling bearing lubrication contaminant testing device, which comprises a loading cover 1, an upper housing 2, a loading piston 3, an annular bushing 4, a bushing flange 5, a load body 6, a test shaft system, and a base 13.

[0007] The upper surface of the base 13 is provided with an annular boss, and the upper surface of the annular boss is provided with an annular bushing 4. The outer surface of the annular bushing 4 is provided with two through holes evenly distributed along the circumference. One end of the test shaft passes through one of the through holes on the outer surface of the annular bushing 4 and is rotatably connected to the other through hole on the outer surface of the annular bushing 4. A bushing flange 5 is provided on the outer side of each of the two through holes on the outer surface of the annular bushing 4. The other end of the test shaft passes through the bushing flange 5 on one of the through holes on the outer surface of the annular bushing 4. A load body 6 is provided on the test shaft and is located inside the annular bushing 4. The top of the annular bushing 4 is provided with an upper housing 2. The middle part of the upper surface of the upper housing 2 is provided with a through hole, and a loading piston 3 is embedded inside the through hole. The output end of the loading piston 3 contacts the outer surface of the load body 6. The top of the loading piston 3 is fixedly connected to the middle part of the lower surface of the loading cover 1. The loading cover 1 is fixedly connected to the middle part of the upper surface of the upper housing 2 by bolts.

[0008] Furthermore, the test shaft system includes a locking nut 7, a main shaft 8, a spacer sleeve 11, a disassembly ring 12, and a hollow sleeve 19;

[0009] A positioning shoulder is machined in the middle of the main shaft 8. A pair of spacer mixing sleeves 11 are fitted on the main shaft 8, and the two spacer mixing sleeves 11 are symmetrically arranged with respect to the positioning shoulder of the main shaft 8. A pair of disassembly rings 12 are provided between the pair of spacer mixing sleeves 11 on the main shaft 8, and the disassembly rings 12 are fitted on the main shaft 8, and the two disassembly rings 12 are symmetrically arranged with respect to the positioning shoulder of the main shaft 8. The end face of each disassembly ring 12 is in contact with the end face of the positioning shoulder of the main shaft 8. A hollow sleeve 19 is fitted on each spacer mixing sleeve 11. Threaded sections are machined at both ends of the main shaft 8, and a locking nut 7 is provided on each threaded section.

[0010] Furthermore, a bearing test position is provided between one end face of the spacer mixing sleeve 11 and one end face of the disassembly ring 12, and a bearing test position is provided between the other end face of the spacer mixing sleeve 11 and one end face of the locking nut 7.

[0011] Furthermore, the upper surface of the annular boss on the base 13 and the lower surface of the annular bushing 4 are respectively uniformly machined with two oil inlet holes 14 along the circumferential direction.

[0012] Furthermore, the oil inlet hole 14 on the base 13 is connected to the oil inlet hole 14 on the annular bushing 4.

[0013] Furthermore, the through hole on the outer circumference of the annular bushing 4 is connected to the oil inlet through hole 14.

[0014] Furthermore, a secondary oil return pipe 15 is provided at the center of the upper surface of the base 13;

[0015] Furthermore, a filter is installed inside the secondary oil return pipe 15;

[0016] Furthermore, the axis of the secondary oil return pipe 15 is perpendicular to the upper surface of the base 13.

[0017] Furthermore, a primary oil return hole 18 is machined on the inner wall of the central hole of the load body 6;

[0018] Furthermore, a square groove is provided on the outer circumferential surface of the load body 6, and the output end of the loading piston 3 contacts the inner bottom surface of the square groove on the outer surface of the load body 6.

[0019] Furthermore, during the test, test bearing 9, test bearing 10, test bearing 17, and test bearing 16 are installed on the four bearing test positions of the main shaft 8. Lubricating oil mixed with an appropriate amount of contaminants is then pumped into the oil inlet hole 14 on the base 13. This allows the contaminated lubricating oil to enter the test shaft system through the oil inlet hole 14 on the annular bushing 4, thus ensuring that the contaminated lubricating oil comes into full contact with the test bearings. The lubricating oil also has a certain pressure, which can drive the spacer sleeve 11 to rotate on the main shaft 8, thereby agitating the lubricating oil and ensuring that the lubricating oil comes into full contact with the test bearings.

[0020] The output shaft of the drive motor is then connected to one end of the main shaft 8 via a coupling, causing the main shaft 8 to rotate continuously. The loading piston 3 is then activated, applying a vertically downward pressure to the load body 6. After maintaining this pressure for a certain period, the drive motor and loading piston are stopped, allowing the test apparatus to remain stationary for a period. Because the upper surface of the base 13 has an annular protrusion, lubricating oil accumulates in the basin on the upper surface of the base 13, causing contaminants in the lubricating oil to settle. Since the upper surface of the base 13 has a secondary oil return pipe 15 in the middle, and the secondary oil return pipe 15 has an internal filter, contaminants in the lubricating oil can be filtered out, allowing clean lubricating oil to flow back to the oil tank. Finally, the test bearing is removed and inspected. This type of test apparatus has two spaced-apart mixing blade bushings 11 in the test shaft system, which can thoroughly mix solid contaminants in the oil to provide lubrication for the test bearing. The primary oil return hole 18 on the load body 6 prevents the loss of solid contaminants, thus simulating the actual working conditions of lubricating contaminants and achieving the final test objective. The secondary oil return pipe 15 located in the middle of the upper surface of the base 13 can prevent solid contaminants from damaging the lubrication system of the tester. While meeting the test conditions, it ensures the stable operation of the lubrication system of the tester, reduces damage to the lubrication system, and thus ensures the smooth progress of the bearing lubrication contaminant test. This allows for a full simulation of the actual working conditions of the test bearing, greatly reduces test errors, and ensures the accuracy of the test.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] This invention overcomes the shortcomings of existing technologies by incorporating two spaced-apart agitator bushings in the test shaft system. This thoroughly mixes solid contaminants in the oil, providing lubrication for the test bearing. A primary oil return hole on the load body prevents the loss of solid contaminants, thus simulating the actual working conditions of lubricating contaminants and achieving the final test objective. Furthermore, a secondary oil return pipe located in the center of the upper surface of the base prevents solid contaminants from damaging the lubrication system of the test apparatus. While meeting the test conditions, this invention ensures the stable operation of the lubrication system, reducing damage and guaranteeing the smooth conduct of the bearing lubrication contaminant test. This fully simulates the actual working conditions of the test bearing, significantly reducing test errors and ensuring test accuracy. Attached Figure Description

[0023] Figure 1 This is a front sectional view of a rolling bearing lubrication contaminant testing device according to the present invention. Detailed Implementation

[0024] Specific implementation method one: Combining Figure 1 This embodiment describes a rolling bearing lubrication contaminant testing device, which comprises a loading cover 1, an upper housing 2, a loading piston 3, an annular bushing 4, a bushing flange 5, a load body 6, a test shaft system, and a base 13.

[0025] The upper surface of the base 13 is provided with an annular boss, and the upper surface of the annular boss is provided with an annular bushing 4. The outer surface of the annular bushing 4 is provided with two through holes evenly distributed along the circumference. One end of the test shaft passes through one of the through holes on the outer surface of the annular bushing 4 and is rotatably connected to the other through hole on the outer surface of the annular bushing 4. A bushing flange 5 is provided on the outer side of each of the two through holes on the outer surface of the annular bushing 4. The other end of the test shaft passes through the bushing flange 5 on one of the through holes on the outer surface of the annular bushing 4. A load body 6 is provided on the test shaft and is located inside the annular bushing 4. The top of the annular bushing 4 is provided with an upper housing 2. The middle part of the upper surface of the upper housing 2 is provided with a through hole, and a loading piston 3 is embedded inside the through hole. The output end of the loading piston 3 contacts the outer surface of the load body 6. The top of the loading piston 3 is fixedly connected to the middle part of the lower surface of the loading cover 1. The loading cover 1 is fixedly connected to the middle part of the upper surface of the upper housing 2 by bolts.

[0026] In this specific embodiment, during the test, test bearing 9, test bearing 10, test bearing 17, and test bearing 16 are respectively installed on the four bearing test positions of the main shaft 8. Lubricating oil mixed with an appropriate amount of contaminants is then pumped into the oil inlet hole 14 on the base 13 through an oil pump. This allows the contaminated lubricating oil to enter the test shaft system through the oil inlet hole 14 on the annular bushing 4, thereby ensuring that the contaminated lubricating oil comes into full contact with the test bearings. Furthermore, the lubricating oil has a certain pressure, which can drive the spacer sleeve 11 to rotate on the main shaft 8, thereby agitating the lubricating oil and ensuring that the lubricating oil comes into full contact with the test bearings.

[0027] The output shaft of the drive motor is then connected to one end of the main shaft 8 via a coupling, causing the main shaft 8 to rotate continuously. The loading piston 3 is then activated, applying a vertically downward pressure to the load body 6. After maintaining this pressure for a certain period, the drive motor and loading piston are stopped, allowing the test apparatus to remain stationary for a period. Because the upper surface of the base 13 has an annular protrusion, lubricating oil accumulates in the basin on the upper surface of the base 13, causing contaminants in the lubricating oil to settle. Since the upper surface of the base 13 has a secondary oil return pipe 15 in the middle, and the secondary oil return pipe 15 has an internal filter, contaminants in the lubricating oil can be filtered out, allowing clean lubricating oil to flow back to the oil tank. Finally, the test bearing is removed and inspected. This type of test apparatus has two spaced-apart mixing blade bushings 11 in the test shaft system, which can thoroughly mix solid contaminants in the oil to provide lubrication for the test bearing. The primary oil return hole 18 on the load body 6 prevents the loss of solid contaminants, thus simulating the actual working conditions of lubricating contaminants and achieving the final test objective. The secondary oil return pipe 15 located in the middle of the upper surface of the base 13 can prevent solid contaminants from damaging the lubrication system of the tester. While meeting the test conditions, it ensures the stable operation of the lubrication system of the tester, reduces damage to the lubrication system, and thus ensures the smooth progress of the bearing lubrication contaminant test. This allows for a full simulation of the actual working conditions of the test bearing, greatly reduces test errors, and ensures the accuracy of the test.

[0028] Specific Implementation Method Two: Combining Figure 1 This embodiment is a further limitation of the test device described in Specific Embodiment 1. The test device for testing lubricating contaminants in rolling bearings described in this embodiment includes a locking nut 7, a main shaft 8, a spacer sleeve 11, a disassembly ring 12, and a hollow sleeve 19.

[0029] A positioning shoulder is machined in the middle of the main shaft 8. A pair of spacer mixing sleeves 11 are fitted on the main shaft 8, and the two spacer mixing sleeves 11 are symmetrically arranged with respect to the positioning shoulder of the main shaft 8. A pair of disassembly rings 12 are provided between the pair of spacer mixing sleeves 11 on the main shaft 8, and the disassembly rings 12 are fitted on the main shaft 8, and the two disassembly rings 12 are symmetrically arranged with respect to the positioning shoulder of the main shaft 8. The end face of each disassembly ring 12 is in contact with the end face of the positioning shoulder of the main shaft 8. A hollow sleeve 19 is fitted on each spacer mixing sleeve 11. Threaded sections are machined at both ends of the main shaft 8, and a locking nut 7 is provided on each threaded section.

[0030] In this specific embodiment, a pair of spaced-apart mixing sleeves 11 are provided on the main shaft 8. The lubricating oil has a certain pressure, which can drive the spaced-apart mixing sleeves 11 to rotate on the main shaft 8, thereby playing the role of stirring the lubricating oil and making the lubricating oil fully contact the test bearing.

[0031] Specific implementation method three: Combining Figure 1 This embodiment further defines the test device described in Specific Embodiment Two. In this embodiment, a rolling bearing lubrication contaminant test device is provided between one end face of the spacer sleeve 11 and one end face of the disassembly ring 12, and between the other end face of the spacer sleeve 11 and one end face of the locking nut 7.

[0032] Specific implementation method four: Combination Figure 1 This embodiment further defines the test device described in Specific Embodiment 1. In this embodiment, a rolling bearing lubrication contaminant test device is provided, wherein the upper surface of the annular boss on the base 13 and the lower surface of the annular bushing 4 are uniformly machined with two oil inlet holes 14 along the circumferential direction.

[0033] Specific Implementation Method Five: Combining Figure 1 This embodiment further defines the test device described in Specific Embodiment 4. In this embodiment, the oil inlet hole 14 on the base 13 is connected to the oil inlet hole 14 on the annular bushing 4.

[0034] Specific Implementation Method Six: Combination Figure 1 This embodiment further defines the test device described in Specific Embodiment 4. In this embodiment, the through hole on the outer circumferential surface of the annular bushing 4 is connected to the oil inlet through hole 14.

[0035] In this specific embodiment, the through hole on the outer circumference of the annular bushing 4 is connected to the oil inlet hole 14, which facilitates the delivery of lubricating oil containing contaminants through the base 13 and the oil inlet hole 14 on the annular bushing 4 into the test shaft system.

[0036] Specific implementation method seven: Combination Figure 1 This embodiment further defines the test device described in Specific Embodiment 1. The rolling bearing lubrication contaminant test device described in this embodiment has a secondary oil return pipe 15 at the center of the upper surface of the base 13, and the secondary oil return pipe 15 has a filter inside.

[0037] In this specific embodiment, since a secondary oil return pipe 15 is provided in the middle of the upper surface of the base 13, and a filter is provided inside the secondary oil return pipe 15, contaminants in the lubricating oil can be filtered out, thereby allowing clean lubricating oil to flow back to the oil tank.

[0038] Specific implementation method eight: Combination Figure 1 This embodiment further defines the test device described in Specific Embodiment Seven. In this embodiment, the axis of the secondary oil return pipe 15 is perpendicular to the upper surface of the base 13 in a rolling bearing lubrication contaminant test device.

[0039] Specific Implementation Method Nine: Combining Figure 1 This embodiment further defines the test device described in Specific Embodiment 1. In this embodiment, a rolling bearing lubrication contaminant test device is provided, wherein a primary oil return hole 18 is machined on the inner wall of the central hole of the load body 6.

[0040] Specific Implementation Method Ten: Combining Figure 1 This embodiment further defines the test device described in Specific Embodiment Nine. In this embodiment, a rolling bearing lubrication contaminant test device is provided with a square groove on the outer circumferential surface of the load body 6, and the output end of the loading piston 3 contacts the inner bottom surface of the square groove on the outer surface of the load body 6.

[0041] In this specific embodiment, a square groove is provided on the outer circumferential surface of the load body 6, and the output end of the loading piston 3 contacts the inner bottom surface of the square groove on the outer surface of the load body 6, so as to avoid slippage or wear when the loading piston 3 applies pressure to the cylindrical load body 6.

[0042] Working principle

[0043] During the test, test bearings 9, 10, 17, and 16 were installed on the four test bearing positions of the main shaft 8. Lubricating oil mixed with a suitable amount of contaminants was pumped into the oil inlet hole 14 on the base 13. The contaminated lubricating oil then entered the test shaft system through the oil inlet hole 14 on the annular bushing 4, allowing the contaminated lubricating oil to fully contact the test bearings. The lubricating oil also had a certain pressure, which could drive the spacer sleeve 11 to rotate on the main shaft 8, thereby agitating the lubricating oil and ensuring that the lubricating oil fully contacted the test bearings.

[0044] The output shaft of the drive motor is then connected to one end of the main shaft 8 via a coupling, causing the main shaft 8 to rotate continuously. The loading piston 3 is then activated, applying a vertically downward pressure to the load body 6. After maintaining this pressure for a certain period, the drive motor and loading piston are stopped, allowing the test apparatus to remain stationary for a period. Because the upper surface of the base 13 has an annular protrusion, lubricating oil accumulates in the basin on the upper surface of the base 13, causing contaminants in the lubricating oil to settle. Since the upper surface of the base 13 has a secondary oil return pipe 15 in the middle, and the secondary oil return pipe 15 has an internal filter, contaminants in the lubricating oil can be filtered out, allowing clean lubricating oil to flow back to the oil tank. Finally, the test bearing is removed and inspected. This type of test apparatus has two spaced-apart mixing blade bushings 11 in the test shaft system, which can thoroughly mix solid contaminants in the oil to provide lubrication for the test bearing. The primary oil return hole 18 on the load body 6 prevents the loss of solid contaminants, thus simulating the actual working conditions of lubricating contaminants and achieving the final test objective. The secondary oil return pipe 15 located in the middle of the upper surface of the base 13 can prevent solid contaminants from damaging the lubrication system of the tester. While meeting the test conditions, it ensures the stable operation of the lubrication system of the tester, reduces damage to the lubrication system, and thus ensures the smooth progress of the bearing lubrication contaminant test. This allows for a full simulation of the actual working conditions of the test bearing, greatly reduces test errors, and ensures the accuracy of the test.

Claims

1. A rolling bearing lubrication contamination test apparatus characterized by: It includes loading gland (1), upper shell (2), loading piston (3), annular bushing (4), bushing flange (5), load body (6), test shafting and base (13); The upper surface of the base (13) is provided with an annular boss, the upper surface of the annular boss is provided with an annular bushing (4), the outer surface of the annular bushing (4) is uniformly provided with two through holes in the circumferential direction, and one end of the test shafting passes through one of the through holes in the outer surface of the annular bushing (4) and is rotationally connected with the other through hole in the outer surface of the annular bushing (4), and the outer sides of the two through holes in the outer surface of the annular bushing (4) are respectively provided with a bushing flange (5), the other end of the test shafting passes through the bushing flange (5) on one of the through holes in the outer surface of the annular bushing (4), the test shafting is provided with a load body (6), and the load body (6) is arranged inside the annular bushing (4), the top end of the annular bushing (4) is provided with an upper shell (2), the upper surface of the upper shell (2) is provided with a through hole in the middle, and the through hole is embedded with a loading piston (3), the output end of the loading piston (3) is in contact with the outer surface of the load body (6), the top end of the loading piston (3) is fixedly connected with the middle of the lower surface of the loading gland (1), and the loading gland (1) is fixedly connected with the middle of the upper surface of the upper shell (2) through bolts. The test shafting comprises a locking nut (7), a main shaft (8), a spacer shaft sleeve (11), a dismounting ring (12) and a hollow sleeve (19). The main shaft (8) is provided with a positioning shoulder in the middle, a pair of spacer shaft sleeves (11) are sleeved on the main shaft (8), and the two spacer shaft sleeves (11) are symmetrically arranged relative to the positioning shoulder of the main shaft (8), a pair of dismounting rings (12) are arranged between the pair of spacer shaft sleeves (11) on the main shaft (8), the dismounting rings (12) are sleeved on the main shaft (8), and the two dismounting rings (12) are symmetrically arranged relative to the positioning shoulder of the main shaft (8). The end face of each dismounting ring (12) is in contact with the end face of the positioning shoulder of the main shaft (8), the hollow sleeve (19) is sleeved on each spacer shaft sleeve (11), and the main shaft (8) is provided with a threaded section at each end. Each threaded section is provided with a locking nut (7); the center of the upper surface of the base (13) is provided with a secondary oil return pipe (15), and the inside of the secondary oil return pipe (15) is provided with a filter; and the center hole of the load body (6) is provided with a primary oil return hole (18).

2. A rolling bearing lubrication contamination test device according to claim 1, characterized in that: The end face of one end of the spacer shaft sleeve (11) and the end face of one end of the dismounting ring (12) are provided with a bearing test site.

3. A rolling bearing lubrication contamination test device according to claim 1, characterized in that: The upper surface of the annular boss on the base (13) and the lower surface of the annular bushing (4) are respectively and uniformly provided with two oil inlet through holes (14) in the circumferential direction.

4. A rolling bearing lubrication contamination test device according to claim 3, characterized in that: The oil inlet through holes (14) on the base (13) are in communication with the oil inlet through holes (14) on the annular bushing (4).

5. A rolling bearing lubrication contamination test device according to claim 4, characterized in that: The through holes on the circumferential outer surface of the annular bushing (4) are in communication with the oil inlet through holes (14).

6. A rolling bearing lubrication contamination test device according to claim 1, wherein: The axis of the secondary oil return pipe (15) is perpendicular to the upper surface of the base (13).

7. A rolling bearing lubrication contamination test device according to claim 1, wherein: The circumferential outer surface of the load body (6) is provided with a square groove, and the output end of the loading piston (3) is in contact with the inner bottom surface of the square groove on the outer surface of the load body (6).

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