An under-ring lubrication cylindrical roller bearing internal oil distribution visualization test bench

Abstract

The application belongs to the technical field of bearings, and discloses a kind of ring under lubrication cylindrical roller bearing internal oil distribution visual test bench, including shell, fixedly connected with connecting disc, connecting disc one end fixedly connected with driving shaft, driving shaft is connected with external driving mechanism;Double-row cylindrical roller bearing, is installed on bearing support, and located in shell, and follow shell synchronous rotation;Oil circuit assembly, including oil tank and oil delivery part, oil tank and oil delivery part are communicated to form circulating oil circuit, lubricating oil in oil tank is transported to double-row cylindrical roller bearing, and lubricating oil in double-row cylindrical roller bearing is recycled to oil tank;Observation assembly, shell is transparent material, and observation assembly is used to shoot the oil distribution state in double-row cylindrical roller bearing through shell.This application can simulate high-speed rotating condition, directly and accurately observe the oil distribution and flow condition in bearing during ring under lubrication process, and provide effective test platform for studying lubrication mechanism and optimizing lubrication structure.

Description

Technical Field

[0001] This invention belongs to the field of bearing technology, and in particular relates to a visual test bench for the internal oil distribution of annular lubricated cylindrical roller bearings. Background Technology

[0002] Rolling bearings are widely used in various types of mechanical equipment, and their lubrication condition has a significant impact on bearing friction, wear, temperature rise, and service life. Double-row cylindrical roller bearings, due to their high load-bearing capacity and structural stability, are often used in heavy-duty and large rotating equipment. During bearing operation, the distribution of lubricating oil inside the bearing directly determines the lubrication effect. Currently, commonly used lubrication methods include oil bath lubrication, jet lubrication, and under-ring lubrication. Among these, under-ring lubrication has advantages such as stable oil supply and simple structure, and has some applications in large bearings. However, existing research mainly focuses on operating conditions where the inner ring of the bearing rotates, with less attention paid to the distribution of oil inside the bearing under the condition of outer ring rotation. Furthermore, the internal structure of double-row cylindrical roller bearings is complex, and under under-ring lubrication conditions, the distribution and flow behavior of the internal oil between the two rows of rollers is difficult to accurately analyze using existing research methods. Existing bearing lubrication testing devices mostly use closed structures, making it difficult to directly observe the distribution of oil inside the bearing. Related research usually relies on inferences from indirect parameters, which has certain limitations.

[0003] Therefore, there is an urgent need for a visual test bench for the distribution of oil inside ring-lubricated cylindrical roller bearings to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a visual test bench for the distribution of oil inside a ring-lubricated cylindrical roller bearing, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a visual test bench for the internal oil distribution of annular lubricated cylindrical roller bearings, comprising: The housing has a connecting plate fixedly connected to one end, and a drive shaft fixedly connected to the end of the connecting plate away from the housing. The drive shaft is connected to an external drive mechanism. The double-row cylindrical roller bearing is mounted on a bearing support via a shaft and is located inside the housing, rotating synchronously with the housing. The oil circuit assembly includes an oil tank and an oil delivery component. The oil tank and the oil delivery component are connected to form a circulating oil circuit. The lubricating oil in the oil tank is delivered to the double-row cylindrical roller bearing, and the lubricating oil in the double-row cylindrical roller bearing is returned to the oil tank. The observation component has a transparent housing and is used to photograph the oil distribution inside the double-row cylindrical roller bearing through the housing.

[0006] According to the present invention, a visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing is provided, wherein a second annular flange is provided on the connecting plate and a first annular flange is provided on the housing, and the first annular flange and the second annular flange are used to axially limit the double-row cylindrical roller bearing.

[0007] According to the present invention, a visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing is provided. The double-row cylindrical roller bearing includes two bearing outer rings and two bearing inner rings adapted to the two bearing outer rings. A spacer ring is provided between the two bearing outer rings, and the two ends of the spacer ring are respectively in contact with the sidewalls of the two bearing outer rings.

[0008] According to the present invention, a visual test bench for the internal oil distribution of an under-ring lubricated cylindrical roller bearing is provided. The shaft body includes a thick section and a thin section. The two inner rings of the bearing are respectively fitted on the thick section of the shaft body, and the thin section of the shaft body is installed on the bearing support.

[0009] According to the present invention, a visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing is provided. The oil supply component includes an oil inlet, which is opened on the thin section of the shaft body. A central oil passage and a radial oil passage are opened in the thick section of the shaft body. One end of the oil inlet is connected to one end of the radial oil passage through the central oil passage. The other end of the oil inlet is connected to the oil tank through an oil inlet passage. The other end of the radial oil passage is connected to the double-row cylindrical roller bearing. An oil return port is opened on the housing, and the oil return port is connected to the oil tank through an oil return circuit.

[0010] According to the present invention, a visualization test rig for the internal oil distribution of an under-ring lubricated cylindrical roller bearing is provided, wherein the observation components include a light source and a camera, both of which are located above the housing.

[0011] According to the present invention, a visual test bench for the internal oil distribution of an under-ring lubricated cylindrical roller bearing is provided, wherein a first temperature sensor and a level gauge are installed on the oil tank.

[0012] According to the present invention, a visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing is provided, wherein a second temperature sensor, a flow valve, a hydraulic pump and a flow meter are installed on the oil inlet circuit, and a third temperature sensor is installed on the oil return circuit.

[0013] According to the present invention, a visual test bench for the internal oil distribution of an under-ring lubricated cylindrical roller bearing is provided, wherein the bearing support is provided with a plurality of fixing holes, and the bearing support is connected to an external fixing platform through the fixing holes.

[0014] According to the present invention, a visual test rig for the internal oil distribution of a ring-lubricated cylindrical roller bearing is provided, wherein the outer ring of the bearing is made of a transparent wear-resistant material.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects: This invention provides a visualization test rig for the internal oil distribution of under-ring lubricated cylindrical roller bearings. By placing a double-row cylindrical roller bearing within a transparent housing and rotating it synchronously with the housing, an under-ring lubrication environment capable of simulating actual high-speed rotational conditions is constructed. The observation components can acquire real-time, intuitive images of the oil distribution, flow trajectory, and film formation inside the bearing through the transparent housing, providing valuable visualization data for studying the under-ring lubrication mechanism. The test rig's ingenious structural design effectively simulates the bearing's rotational motion and achieves continuous lubricant supply, ensuring the continuity and reliability of the experiment and providing a powerful tool for optimizing the lubrication design of high-speed bearings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the installation state of the double-row cylindrical roller bearing and its housing according to the present invention; Figure 3 This is a schematic diagram showing the installation state of the double-row cylindrical roller bearing and bearing support of the present invention. The components are as follows: 1. Oil tank; 2. Fixing hole; 3. Oil return circuit; 4. Oil inlet circuit; 5. Second temperature sensor; 6. Flow valve; 7. Bearing support; 8. Third temperature sensor; 9. Hydraulic pump drive motor; 10. Hydraulic pump; 11. First temperature sensor; 12. Level gauge; 13. Light source; 14. Connecting plate; 15. Camera; 16. Flow meter; 17. Housing; 18. Thick section of shaft; 19. Thin section of shaft; 20. Oil inlet; 21. Central oil passage; 22. Inner ring of bearing; 23. Outer ring of bearing; 24. Spacer ring; 25. Radial oil passage. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1-3 This invention provides a visualization test bench for the internal oil distribution of annular lubricated cylindrical roller bearings, comprising: The housing 17 has a connecting plate 14 fixedly connected to one end, and a drive shaft fixedly connected to the end of the connecting plate 14 away from the housing 17. The drive shaft is connected to an external drive mechanism. The double-row cylindrical roller bearing is mounted on the bearing support 7 via a shaft and is located inside the housing 17, rotating synchronously with the housing 17. The oil circuit assembly includes an oil tank 1 and an oil delivery component. The oil tank 1 and the oil delivery component are connected to form a circulating oil circuit. The lubricating oil in the oil tank 1 is delivered to the double-row cylindrical roller bearing, and the lubricating oil in the double-row cylindrical roller bearing is returned to the oil tank 1. The observation component, with a transparent housing 17, is used to photograph the distribution of oil inside the double-row cylindrical roller bearing through the housing 17.

[0021] In one embodiment of the present invention, by placing a double-row cylindrical roller bearing within a transparent housing 17 and rotating it synchronously with the housing 17, an under-ring lubrication environment capable of simulating actual high-speed rotational conditions is constructed. The observation components can acquire real-time, intuitive images of the oil distribution, flow trajectory, and film formation inside the bearing through the transparent housing 17, providing valuable visual data for studying the under-ring lubrication mechanism. This test rig features an ingenious structural design that effectively simulates the rotational motion of the bearing and achieves cyclical supply of lubricating oil, ensuring the continuity and reliability of the experiment and providing a powerful tool for optimizing the lubrication design of high-speed bearings.

[0022] As an optional implementation, the connecting disc 14 is provided with a second annular flange, and the housing 17 is provided with a first annular flange. The first annular flange and the second annular flange are used to axially limit the double-row cylindrical roller bearing.

[0023] In one embodiment of the present invention, a first annular flange is formed on the inner side of the housing 17, and a second annular flange is formed on the inner side of the connecting disc 14. The first annular flange and the second annular flange are arranged opposite each other along the axial direction to limit the axial movement of the double-row cylindrical roller bearing.

[0024] As an optional implementation, the double-row cylindrical roller bearing includes two bearing outer rings 23 and two bearing inner rings 22 adapted to the two bearing outer rings 23. A spacer 24 is provided between the two bearing outer rings 23, and the two ends of the spacer 24 are respectively in contact with the sidewalls of the two bearing outer rings 23.

[0025] In one embodiment of the present invention, the spacer ring 24 positions the distance between the outer rings 23 of the two bearings to ensure the stability of the imaging observation window and the oil distribution space.

[0026] As an optional implementation, the shaft includes a thick section 18 and a thin section 19, with the inner rings 22 of the two bearings respectively fitted on the thick section 18 and the thin section 19 mounted on the bearing support 7.

[0027] In one embodiment of the present invention, the bearing inner ring 22 is coaxially sleeved on the thick section 18 of the shaft body, and the thin section 19 of the shaft body is fixedly installed on the bearing support 7 to support the bearing inner ring 22 and keep it relatively stationary. An axial flange is provided on one side of the thick section 18 of the shaft body, and an annular positioning structure is fixedly provided on the other side. The axial flange and the annular positioning structure are used to axially position the bearing inner ring 22 to prevent it from moving during the test.

[0028] Specifically, a stepped structure is formed between the thick section 18 and the thin section 19 of the shaft. The stepped structure cooperates with the bearing support 7 to achieve axial positioning. The bearing support 7 has a through hole. The thin section 19 of the shaft passes through the through hole and is fixedly connected to the bearing support 7. The bearing support 7 has multiple countersunk holes around the through hole. The countersunk holes penetrate the bearing support 7 and extend into the thick section 18 of the shaft, and are connected to the thick section 18 of the shaft by bolts.

[0029] As an optional implementation, the oil supply component includes an oil inlet 20, which is provided on the thin section 19 of the shaft. A central oil passage 21 and a radial oil passage 25 are provided in the thick section 18 of the shaft. One end of the oil inlet 20 is connected to one end of the radial oil passage 25 through the central oil passage 21, and the other end of the oil inlet 20 is connected to the oil tank 1 through the oil inlet passage 4. The other end of the radial oil passage 25 is connected to the double-row cylindrical roller bearing. An oil return port is provided on the housing 17, and the oil return port is connected to the oil tank 1 through the oil return circuit 3.

[0030] In one embodiment of the present invention, the lubricating oil enters through the oil inlet 20, ascends along the central oil passage 21, and is directionally delivered to the contact area between the roller and the raceway through the radial oil passage 25. By supplying oil through the directional oil passage, stable and repeatable oil supply to the critical friction pair area can be achieved under ring lubrication conditions, which facilitates the study of the distribution and transport law of oil between the two rows of rollers.

[0031] As an optional implementation, the observation assembly includes a light source 13 and a camera 15, both of which are located above the housing 17.

[0032] In one embodiment of the present invention, the housing 17 is made of optical-grade transparent material. By combining the transparent housing with a stable light source for imaging, it is possible to intuitively observe the distribution of oil inside the bearing, the formation and rupture of the oil film, and improve the intuitiveness and accuracy of lubrication status analysis.

[0033] As an optional implementation, a first temperature sensor 11 and a level gauge 12 are installed on the oil tank 1.

[0034] In one embodiment of the present invention, a first temperature sensor 11 is used to collect the temperature inside the oil tank 1, and a level gauge 12 is used to collect the amount of oil inside the oil tank 1.

[0035] As an optional implementation, a second temperature sensor 5, a flow valve 6, a hydraulic pump 10, and a flow meter 16 are installed on the oil inlet circuit 4, and a third temperature sensor 8 is installed on the oil return circuit 3.

[0036] In one embodiment of the present invention, a flow valve 6, a flow meter 16, a temperature sensor and a level gauge 12 are provided, and the data are collected and controlled by a control system. By monitoring parameters such as flow rate, temperature and level, the stability of the test conditions can be ensured and the repeatability of multiple sets of test conditions can be achieved.

[0037] As an optional implementation, the bearing support 7 is provided with multiple fixing holes 2, and the bearing support 7 is connected to an external fixing platform through the fixing holes 2.

[0038] In one embodiment of the present invention, the bearing support 7 is provided with a plurality of fixing holes 2, and is fixedly connected to an external fixing platform by mounting bolts in the fixing holes 2.

[0039] As an alternative implementation, the bearing outer ring 23 is made of a transparent wear-resistant material.

[0040] In one embodiment of the present invention, the outer ring 23 of the bearing is made of a transparent wear-resistant material, thereby enabling observation of the lubricating oil film in the contact area between the roller and the raceway.

[0041] In one embodiment of the present invention, during use: at the start of the test, the operator adds lubricating oil to the oil tank 1 and confirms that the level gauge 12 and the first temperature sensor 11 are in normal monitoring status; then the control system starts the hydraulic pump drive motor 9 to drive the hydraulic pump 10 to work, pumping the lubricating oil through the oil inlet 4 to the oil inlet 20. The lubricating oil in the oil inlet 4 is sequentially monitored by the second temperature sensor 5 for oil inlet temperature, regulated by the flow valve 6 for oil supply flow rate and measured by the flow meter 16, while the third temperature sensor 8 on the oil return circuit 3 monitors the oil return temperature, forming a closed-loop oil supply and return condition; after preparation, the drive connecting plate 14 and the housing 17 are rotated as a whole, and the outer ring 23 of the bearing moves with the housing. The bearing body 17 rotates synchronously to simulate the outer ring rotation condition; the bearing inner ring 22 is coaxially sleeved on the thick section 18 of the shaft body fixedly installed on the bearing support 7, and maintains axial positioning and relative stillness under the limiting action of the axial flange and the annular positioning structure; during the lubrication and oil supply process under the ring, the lubricating oil enters the central oil passage 21 through the oil inlet 20, and is directionally transported to the contact area between the roller and the raceway through the radial oil passage 25 connected to it at the end of the central oil passage 21. Under the action of centrifugal force and shear, the lubricating oil diffuses along the raceway and the gap between the rollers and is distributed between the two rows of rollers to form a visible oil distribution. The lubricated and cooled oil flows back to the bottom of the housing 17 and returns to the oil tank 1 through the oil return circuit 3 to achieve recycling.

[0042] During the test operation, the light source 13 provides stable illumination to the observation area, and the camera 15 continuously records the distribution of oil inside the housing 17 and the oil film morphology in the contact area. At the same time, the control system synchronously collects and displays the signals from the flow meter 16, the first temperature sensor 11, the second temperature sensor 5, the third temperature sensor 8, and the level gauge 12 to achieve synchronous recording and comparative analysis of "visualized images + operating parameters".

[0043] After the test, the drive mechanism and hydraulic pump drive motor 9 were stopped in sequence, and the hydraulic pump 10 was shut off to supply oil. The test was completed after the oil flowed back to the oil tank 1 through the return oil circuit 3. Finally, the video data captured by the camera 15 and the parameters such as flow rate, temperature and liquid level recorded by the control system were exported for subsequent quantitative / qualitative analysis of the oil distribution pattern inside the bearing. Through the above process, the test bench realized the visualization test of the oil distribution inside the rotating double-row cylindrical roller bearing with ring lubrication.

[0044] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] 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. A visual test bench for the distribution of internal oil in a ring-lubricated cylindrical roller bearing, characterized in that, include: The housing (17) has a connecting plate (14) fixedly connected to one end. The end of the connecting plate (14) away from the housing (17) is fixedly connected to a drive shaft, which is connected to an external drive mechanism. The double-row cylindrical roller bearing is mounted on the bearing support (7) via a shaft and is located inside the housing (17), and rotates synchronously with the housing (17); The oil circuit assembly includes an oil tank (1) and an oil delivery component. The oil tank (1) and the oil delivery component are connected to form a circulating oil circuit. The lubricating oil in the oil tank (1) is delivered to the double-row cylindrical roller bearing, and the lubricating oil in the double-row cylindrical roller bearing is recycled back to the oil tank (1). The observation component, wherein the housing (17) is made of transparent material, is used to photograph the oil distribution inside the double-row cylindrical roller bearing through the housing (17).

2. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 1, characterized in that: The connecting disc (14) is provided with a second annular flange, and the housing (17) is provided with a first annular flange. The first annular flange and the second annular flange are used to axially limit the double-row cylindrical roller bearing.

3. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 1, characterized in that: The double-row cylindrical roller bearing includes two bearing outer rings (23) and two bearing inner rings (22) adapted to the two bearing outer rings (23). A spacer (24) is provided between the two bearing outer rings (23), and the two ends of the spacer (24) are respectively in contact with the sidewalls of the two bearing outer rings (23).

4. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 3, characterized in that: The shaft includes a thick section (18) and a thin section (19). The two inner rings (22) of the bearings are respectively fitted on the thick section (18) of the shaft, and the thin section (19) of the shaft is installed on the bearing support (7).

5. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 4, characterized in that: The oil supply component includes an oil inlet (20) which is opened on the thin section (19) of the shaft body. A central oil passage (21) and a radial oil passage (25) are opened in the thick section (18) of the shaft body. One end of the oil inlet (20) is connected to one end of the radial oil passage (25) through the central oil passage (21). The other end of the oil inlet (20) is connected to the oil tank (1) through the oil inlet passage (4). The other end of the radial oil passage (25) is connected to the double-row cylindrical roller bearing. An oil return port is opened on the housing (17). The oil return port is connected to the oil tank (1) through the oil return circuit (3).

6. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 1, characterized in that: The observation assembly includes a light source (13) and a camera (15), both of which are located above the housing (17).

7. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 5, characterized in that: The oil tank (1) is equipped with a first temperature sensor (11) and a level gauge (12).

8. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 5, characterized in that: The oil inlet circuit (4) is equipped with a second temperature sensor (5), a flow valve (6), a hydraulic pump (10) and a flow meter (16), and the oil return circuit (3) is equipped with a third temperature sensor (8).

9. The visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 1, characterized in that: The bearing support (7) has multiple fixing holes (2), and the bearing support (7) is connected to an external fixed platform through the fixing holes (2).

10. A visual test bench for the internal oil distribution of a ring-lubricated cylindrical roller bearing according to claim 3, characterized in that: The outer ring (23) of the bearing is made of a transparent wear-resistant material.

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