Oil-impregnated bearing assembly

Abstract

The application relates to a thin oil bearing assembly, and relates to the technical field of bearing assemblies, which comprises a connecting shaft, the outer side of the connecting shaft is provided with a bearing body, the two ends of the bearing body are clamped with a first labyrinth sleeve and a second labyrinth sleeve, the inner walls of the first labyrinth sleeve and the second labyrinth sleeve are fixedly installed with labyrinth rings, the outer surfaces of the connecting shaft are rotationally connected with a first end cover and a second end cover, and the outer surfaces of the first end cover and the second end cover are fixedly connected with the corresponding labyrinth rings. In the process of installing the bearing body on the connecting shaft, the first end cover and the second end cover are stably connected with the corresponding first labyrinth sleeve and second labyrinth sleeve through the connection between the labyrinth rings and the labyrinth sleeves, a stable installation space is provided for the first 0-shaped oil baffle ring and the second 0-shaped oil baffle ring, and the device can prevent lubricating oil from splashing during rotation through the setting of the first 0-shaped oil baffle ring and the second 0-shaped oil baffle ring.

Description

Technical Field

[0001] This application relates to the field of bearing assembly technology, and in particular to thin oil bearing assemblies. Background Technology

[0002] The bearing lubrication method of slurry pumps is usually grease lubrication, which is generally suitable for heavy-load, low-speed, and low-temperature operating environments. However, due to the complex and diverse working environment of slurry pumps, sometimes the same model of slurry pump needs to meet different working conditions, and thin oil lubrication is used in light-load, high-speed, and high-temperature operating environments.

[0003] Grease lubrication cannot meet the lubrication needs of bearings under some complex working conditions, such as low temperature, wide temperature range, or high speed operation. During long-term use, the high-speed rotation of the connecting shaft will exert centrifugal force on the oil inside the bearing body. Without an oil retainer ring, the oil will easily splash out from the gap after long-term use. The contact surface between the rolling elements and the raceway inside the bearing loses the protection of the oil film, and the metal directly rubs against each other, which will accelerate the wear rate sharply and easily lead to abnormal bearing noise and excessive temperature rise.

[0004] Therefore, a new approach is needed to solve this problem. Utility Model Content

[0005] The purpose of this application is to provide a thin oil bearing assembly that has the advantages of preventing lubricating oil from splashing during rotation. It solves the problem that in existing devices, during long-term use, the high-speed rotation of the connecting shaft will exert centrifugal force on the oil inside the bearing body. Without an oil retainer ring, the oil will easily splash out from the gaps after long-term use. The contact surface between the rolling elements and the raceway inside the bearing loses the protection of the oil film, and the metal directly rubs against each other, which greatly accelerates the wear rate and easily leads to abnormal bearing noise and excessive temperature rise.

[0006] The thin oil bearing assembly provided in this application adopts the following technical solution: it includes a connecting shaft, a bearing body is provided on the outer side of the connecting shaft, a first labyrinth sleeve and a second labyrinth sleeve are snapped at both ends of the bearing body, a labyrinth ring is fixedly installed on the inner wall of the first labyrinth sleeve and the second labyrinth sleeve, a first end cap and a second end cap are rotatably connected to the outer surface of the connecting shaft, the outer surfaces of the first end cap and the second end cap are fixedly connected to the corresponding labyrinth ring, a first O-ring and a second O-ring are fixedly installed on the inner wall of the first end cap and the second end cap, and the inner walls of the first O-ring and the second O-ring are rotatably connected to the connecting shaft.

[0007] By adopting the above technical solution, the connecting shaft, as the core transmission component, is the rotation center of the entire assembly. Other components are assembled and cooperate around it. The bearing body can support and accommodate the internal components, providing a stable installation foundation for the rotation of the connecting shaft. The snap-fit ​​structure at both ends is used to fix the first labyrinth sleeve and the second labyrinth sleeve, ensuring the integrity of the assembly. The first labyrinth sleeve and the second labyrinth sleeve are combined with the bearing body by snap-fit, and the seal is achieved through the mutual cooperation between the two and the corresponding labyrinth rings. The first O-ring and the second O-ring are installed on the inner wall of the end cover and are rotatably connected to the connecting shaft. Their main function is to prevent thin oil from leaking outward along the surface of the connecting shaft. The elasticity of the O-ring tightly fits the connecting shaft, forming an auxiliary sealing barrier, which, in conjunction with the labyrinth seal, improves the overall anti-leakage effect.

[0008] Preferably, the ends of the first labyrinth sleeve and the second labyrinth sleeve that are far apart from each other are provided with bearing seal rings, and the outer surface of each bearing seal ring is engaged with the corresponding first labyrinth sleeve and the corresponding first end cap and the corresponding second end cap. The outer surfaces of the first end cap and the second end cap are fixedly connected with round nuts.

[0009] By adopting the above technical solution, the bearing seal ring further enhances the sealing effect at both ends of the component, preventing external dust, slurry and other impurities from entering the interior through the gap between the end cap and the labyrinth sleeve. At the same time, it reduces the seepage of thin oil from the gap. Together with the labyrinth seal and the O-ring, it forms a multi-seal synergy, significantly improving the sealing performance and reliability of the component under harsh working conditions. The round nut mainly undertakes the functions of axial positioning and fastening. By tightening the round nut, the relative positions of rotating parts such as the end cap, labyrinth ring, and O-ring with the connecting shaft can be locked, preventing the components from loosening or the sealing gap from increasing due to axial movement caused by the high-speed rotation of the connecting shaft. This ensures that each sealing structure always maintains a stable fit, indirectly guaranteeing the long-term operation of the sealing and lubrication system.

[0010] Preferably, the inner walls of the first end cap and the second end cap are each fitted with a fixing bolt, and the outer surface of each fixing bolt is threaded to the bearing body.

[0011] By adopting the above technical solution, the fixing bolts are inserted through the insertion structure of the inner wall of the first end cover and the second end cover, and are threadedly connected to the bearing body, forming a rigid connection between the end cover and the bearing body, thereby enhancing the stability of the sealing structure.

[0012] Preferably, both ends of the bearing body are provided with sealing gaskets, and the end of each sealing gasket away from the bearing body is in contact with the corresponding first labyrinth sleeve and second labyrinth sleeve.

[0013] By adopting the above technical solution, during the installation of the first maze sleeve and the second maze sleeve, the two will squeeze the corresponding sealing gaskets. At this time, the sealing gaskets can fill the assembly gap between the two through their own elastic deformation, effectively preventing external impurities from entering the interior from the joint of stationary parts.

[0014] Preferably, a first bearing and a second bearing are fixedly installed on the inner wall of the bearing body, and the inner walls of the first bearing and the second bearing are both fixedly installed with the connecting shaft.

[0015] By adopting the above technical solution, the first bearing and the second bearing are the direct support components for the rotational motion of the connecting shaft. They transmit the radial and axial loads of the connecting shaft to the bearing body through rolling friction, thereby achieving stable rotation of the connecting shaft. At the same time, they reduce the frictional resistance during transmission, reduce energy loss, and ensure the efficient operation of the slurry pump.

[0016] Preferably, a vent cap is fixedly installed on the outer surface of the bearing body, and an oil dipstick is fixedly installed on the inner wall of the bearing body.

[0017] By adopting the above technical solutions, the vent cap, through its one-way or filtered venting design, can release excess gas when the pressure increases and filter the intake air when the pressure is negative, thereby maintaining stable air pressure inside the bearing body, reducing the risk of seal failure and oil contamination caused by air pressure fluctuations, and ensuring the stability of the lubrication system. The dipstick, fixed to the inner wall of the bearing body, is a key component for monitoring the thin oil level. By extending into the oil cavity of the bearing body, it can intuitively display the real-time oil level, facilitating operators to regularly check and replenish the thin oil, ensuring that the lubrication system is always in optimal working condition, and avoiding equipment failure caused by abnormal oil levels.

[0018] Preferably, a connecting key is fixedly installed on the outer surface of the connecting shaft.

[0019] By adopting the above technical solution, the connecting key is fixed on the outer surface of the connecting shaft. It is usually connected to other transmission components of the slurry pump through keyway to form a circumferential fixed connection. Through the mechanical engagement of the connecting key, the rotational torque of the connecting shaft can be stably transmitted to the associated components, ensuring that the power is efficiently transmitted from the shaft system to the working mechanism. It is an important power connection structure for realizing the pumping function of the slurry pump.

[0020] Preferably, a connecting frame is fixedly connected to the outer surface of the bearing body, and an oil plug is fixedly installed on the inner wall of the connecting frame, with a gasket provided on the inner wall of the oil plug.

[0021] By adopting the above technical solution, the connecting frame is fixed on the outer surface of the bearing body, mainly undertaking the function of connecting and fixing the bearing assembly and the slurry pump structure. The connecting frame can stably install the bearing body on the pump body or frame, ensuring that the overall position of the bearing assembly is fixed during equipment operation, avoiding displacement caused by vibration or load impact. At the same time, it provides an installation carrier for maintenance components such as oil plugs, taking into account both structural support and ease of operation and maintenance. The gasket is a sealing component set on the mating surface of the oil plug and the connecting frame. Through the elastic deformation of the gasket, it can fill the tiny gap between the oil plug and the mounting hole, strengthening the sealing effect at the plug. When adding or replacing thin oil, the oil plug can be removed to inject or drain the oil.

[0022] In summary, this application includes at least one of the following beneficial technical effects: This thin oil bearing assembly, by setting up a connecting shaft, bearing body, first labyrinth sleeve, second labyrinth sleeve, labyrinth ring, first end cap, second end cap, first O-ring oil retainer, and second O-ring oil retainer, etc., and by installing the bearing body on the connecting shaft, the connection between the labyrinth ring and the labyrinth sleeve can stably connect the first end cap and the second end cap to the corresponding first labyrinth sleeve and the second labyrinth sleeve, respectively, providing a stable installation space for the first O-ring oil retainer and the second O-ring oil retainer. Thus, the device can prevent lubricating oil from splashing during rotation by setting up the first O-ring oil retainer and the second O-ring oil retainer. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a side view of the overall structure of this application; Figure 3 This is a schematic diagram of the internal structure of the bearing body in this application; Figure 4 This is a schematic diagram of the connecting shaft structure of this application; Figure 5 This is a schematic diagram of the end cap structure of this application.

[0024] In the picture: 1. Connecting key; 2. Connecting shaft; 3. Round nut; 4. First labyrinth sleeve; 5. First end cap; 6. First bearing; 7. Vent cap; 8. Bearing body; 9. Second bearing; 10. Second labyrinth sleeve; 11. Second end cap; 12. Sealing ring; 13. Labyrinth ring; 14. First O-ring oil retainer; 15. Second O-ring oil retainer; 16. Sealing gasket; 17. Fixing bolt; 18. Oil dipstick; 19. Gasket; 20. Oil plug; 21. Connecting bracket. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0026] Example 1: Thin oil bearing assembly, refer to Figure 1 , Figure 3 , Figure 5 The assembly includes a connecting shaft 2, with a bearing body 8 on the outer side of the connecting shaft 2. A first labyrinth sleeve 4 and a second labyrinth sleeve 10 are snapped onto both ends of the bearing body 8. Labyrinth rings 13 are fixedly installed on the inner walls of both the first labyrinth sleeve 4 and the second labyrinth sleeve 10. A first end cap 5 and a second end cap 11 are rotatably connected to the outer surface of the connecting shaft 2. The outer surfaces of both the first end cap 5 and the second end cap 11 are fixedly connected to the corresponding labyrinth rings 13. A first O-ring oil baffle 14 and a second O-ring oil baffle 15 are fixedly installed on the inner walls of both the first O-ring oil baffle 14 and the second O-ring oil baffle 15. The inner walls of both the first O-ring oil baffle 14 and the second O-ring oil baffle 15 are rotatably connected to the connecting shaft 2.

[0027] like Figure 1 , Figure 3 , Figure 5 The connecting shaft 2, as the core transmission component, is the rotation center of the entire assembly. All other components are assembled and coordinated around it. The bearing body 8 can support and accommodate the internal components, providing a stable mounting base for the rotation of the connecting shaft 2. The snap-fit ​​structure at both ends is used to fix the first labyrinth sleeve 4 and the second labyrinth sleeve 10, ensuring the integrity of the assembly. The first labyrinth sleeve 4 and the second labyrinth sleeve 10 are combined with the bearing body 8 by snap-fit, and the seal is achieved through the mutual cooperation between the two and the corresponding labyrinth ring 13. The first O-ring oil baffle 14 and the second O-ring oil baffle 15 are installed on the inner wall of the end cover and are rotatably connected to the connecting shaft 2. Their main function is to prevent thin oil from leaking outward along the surface of the connecting shaft 2. The elasticity of the O-ring tightly fits the connecting shaft 2, forming an auxiliary sealing barrier, which, in conjunction with the labyrinth seal, improves the overall anti-leakage effect.

[0028] Example 2: Thin oil bearing assembly, please refer to Figure 3 , Figure 5Each of the first labyrinth sleeve 4 and the second labyrinth sleeve 10 has a bearing seal ring 12 at one of its far ends. The outer surface of each bearing seal ring 12 engages with the corresponding first labyrinth sleeve 4 and the second labyrinth sleeve 10, as well as the corresponding first end cap 5 and the second end cap 11. The outer surfaces of the first end cap 5 and the second end cap 11 are fixedly connected with round nuts 3. The bearing seal ring 12 further enhances the sealing effect at both ends of the component, preventing external dust, slurry and other impurities from entering the interior through the gap between the end cap and the labyrinth sleeve. At the same time, it reduces the seepage of thin oil from the gap. Together with the labyrinth seal and the O-ring oil retainer, it forms a multi-seal synergy, which significantly improves the sealing performance and reliability of the component under harsh working conditions. The round nut 3 mainly undertakes the functions of axial positioning and fastening. By tightening the round nut 3, the relative positions of rotating components such as the end cap, labyrinth ring 13, and O-ring oil retainer with the connecting shaft 2 can be locked, preventing the components from loosening or the sealing gap from increasing due to axial movement caused by the high-speed rotation of the connecting shaft 2. This ensures that each sealing structure always maintains a stable fit, indirectly guaranteeing the long-term operation of the sealing and lubrication system.

[0029] Please see Figure 1 , Figure 2 The inner walls of the first end cover 5 and the second end cover 11 are each fitted with a fixing bolt 17. The outer surface of each fixing bolt 17 is threaded to the bearing body 8. The fixing bolt 17 is inserted through the insertion structure of the inner walls of the first end cover 5 and the second end cover 11 and threaded to the bearing body 8, forming a rigid connection between the end cover and the bearing body 8, thereby enhancing the stability of the sealing structure.

[0030] Please see Figure 3 , Figure 5 Both ends of the bearing body 8 are provided with sealing gaskets 16. The end of each sealing gasket 16 away from the bearing body 8 is in contact with the corresponding first labyrinth sleeve 4 and second labyrinth sleeve 10. During the installation of the first labyrinth sleeve 4 and the second labyrinth sleeve 10, the two will squeeze the corresponding sealing gasket 16. At this time, the sealing gasket 16 can fill the assembly gap between the two through its own elastic deformation, effectively preventing external impurities from entering the interior from the joint of the stationary parts.

[0031] Please see Figure 5 The inner wall of the bearing body 8 is fixedly installed with a first bearing 6 and a second bearing 9. The inner walls of the first bearing 6 and the second bearing 9 are both fixedly installed with the connecting shaft 2. The first bearing 6 and the second bearing 9 are the direct support components for the rotational movement of the connecting shaft 2. They transmit the radial and axial loads of the connecting shaft 2 to the bearing body 8 through rolling friction, so as to realize the stable rotation of the connecting shaft 2, reduce the frictional resistance in the transmission process, reduce energy loss, and ensure the efficient operation of the slurry pump.

[0032] Please see Figure 1A vent cap 7 is fixedly installed on the outer surface of the bearing body 8, and an oil dipstick 18 is fixedly installed on the inner wall of the bearing body 8. The vent cap 7, through its one-way venting or filtered venting design, can release excess gas when the pressure increases and filter the air drawn in when the pressure is negative, thereby maintaining the stability of the internal air pressure of the bearing body 8, reducing the risk of seal failure and oil contamination caused by air pressure fluctuations, and ensuring the stability of the lubrication system. The oil dipstick 18, fixed on the inner wall of the bearing body 8, is a key component for monitoring the thin oil level. By extending into the oil cavity of the bearing body 8, it can intuitively display the real-time oil level, making it convenient for operators to regularly check and replenish the thin oil, ensuring that the lubrication system is always in the best working condition and avoiding equipment failure caused by abnormal oil level.

[0033] Please see Figure 1 , Figure 3 , Figure 4 A connecting key 1 is fixedly installed on the outer surface of the connecting shaft 2. The connecting key 1 is fixed on the outer surface of the connecting shaft 2 and usually cooperates with other transmission components of the slurry pump through keyways to form a circumferential fixed connection. Through the mechanical engagement of the connecting key 1, the rotational torque of the connecting shaft 2 can be stably transmitted to the associated components, ensuring that the power is efficiently transmitted from the shaft system to the working mechanism. It is an important power connection structure for realizing the pumping function of the slurry pump.

[0034] Please see Figure 1 , Figure 2 , Figure 3 A connecting frame 21 is fixedly connected to the outer surface of the bearing body 8. An oil plug 20 is fixedly installed on the inner wall of the connecting frame 21. A gasket 19 is provided on the inner wall of the oil plug 20. The connecting frame 21 is fixed to the outer surface of the bearing body 8 and mainly undertakes the function of connecting and fixing the bearing assembly and the slurry pump structure. The bearing body 8 can be stably installed on the pump body or frame through the connecting frame 21, ensuring that the overall position of the bearing assembly is fixed during equipment operation and avoiding displacement caused by vibration or load impact. At the same time, it provides an installation carrier for maintenance components such as the oil plug 20, taking into account both structural support and maintenance convenience. The gasket 19 is a sealing element set on the mating surface of the oil plug 20 and the connecting frame 21. Through the elastic deformation of the gasket 19, the tiny gap between the oil plug 20 and the mounting hole can be filled, and the sealing effect at the plugging point can be strengthened. When adding or replacing thin oil, the oil plug 20 can be removed to inject or drain the oil.

[0035] The implementation principle of this application embodiment is as follows: First, the connecting shaft 2 with the first bearing 6 and the second bearing 9 is inserted into the bearing body 8. Then, the sealing gasket 16 is placed at both ends of the bearing body 8, and the first labyrinth sleeve 4 and the second labyrinth sleeve 10 are fitted from both ends of the bearing body 8. Then, the sealing ring 12 is placed inside the first end cover 5 and the second end cover 11. At this time, the first end cover 5 and the second end cover 11 with the first O-ring oil baffle 14 and the second O-ring oil baffle 15 are respectively installed inside the first labyrinth sleeve 4 and the second labyrinth sleeve 10 on both sides, and sealed with the labyrinth sleeve through the labyrinth ring 13. Thus, the sealing ring 14 and the second... The O-ring 15 prevents lubricating oil from splashing during rotation. During this process, the bearings are spaced apart and the round nut 3 is used to axially fasten the end cover, limiting the radial runout and axial movement of the connecting shaft 2, ensuring the coaxiality of the shaft system during rotation, and avoiding component interference caused by shaft misalignment. At this time, the end cover is connected to the bearing body 8 by using the fixing bolt 17, and then a closed oil cavity is formed inside the bearing body 8. At this time, the dipstick 18 is directly inserted into the oil cavity, and the operator can visually judge the oil level through the dipstick 18, providing a basis for regular oil replenishment and oil change. The vent cap 7 outside the bearing body 8 solves the air pressure problem caused by thermal expansion and contraction.

Claims

1. A thin oil bearing assembly, including a connecting shaft (2), characterized in that: The outer side of the connecting shaft (2) is provided with a bearing body (8). The two ends of the bearing body (8) are engaged with a first labyrinth sleeve (4) and a second labyrinth sleeve (10). The inner walls of the first labyrinth sleeve (4) and the second labyrinth sleeve (10) are both fixedly installed with labyrinth rings (13). The outer surface of the connecting shaft (2) is rotatably connected with a first end cap (5) and a second end cap (11). The outer surfaces of the first end cap (5) and the second end cap (11) are both fixedly connected with the corresponding labyrinth rings (13). The inner walls of the first end cap (5) and the second end cap (11) are fixedly installed with a first O-ring oil baffle (14) and a second O-ring oil baffle (15). The inner walls of the first O-ring oil baffle (14) and the second O-ring oil baffle (15) are both rotatably connected with the connecting shaft (2).

2. The thin oil bearing assembly according to claim 1, characterized in that: The first labyrinth sleeve (4) and the second labyrinth sleeve (10) are provided with bearing seal rings (12) at their far ends. The outer surface of each bearing seal ring (12) is engaged with the corresponding first labyrinth sleeve (4) and the second labyrinth sleeve (10), as well as the corresponding first end cap (5) and the second end cap (11). The outer surfaces of the first end cap (5) and the second end cap (11) are fixedly connected with round nuts (3).

3. The thin oil bearing assembly according to claim 2, characterized in that: The inner walls of the first end cap (5) and the second end cap (11) are each fitted with a fixing bolt (17), and the outer surface of each fixing bolt (17) is threaded to the bearing body (8).

4. The thin oil bearing assembly according to claim 2, characterized in that: Both ends of the bearing body (8) are provided with sealing gaskets (16), and the end of each sealing gasket (16) away from the bearing body (8) is in contact with the corresponding first labyrinth sleeve (4) and second labyrinth sleeve (10).

5. The thin oil bearing assembly according to claim 4, characterized in that: The inner wall of the bearing body (8) is fixedly installed with a first bearing (6) and a second bearing (9), and the inner walls of the first bearing (6) and the second bearing (9) are fixedly installed with the connecting shaft (2).

6. The thin oil bearing assembly according to claim 5, characterized in that: A vent cap (7) is fixedly installed on the outer surface of the bearing body (8), and an oil dipstick (18) is fixedly installed on the inner wall of the bearing body (8).

7. The thin oil bearing assembly according to claim 1, characterized in that: A connecting key (1) is fixedly installed on the outer surface of the connecting shaft (2).

8. The thin oil bearing assembly according to claim 6, characterized in that: A connecting frame (21) is fixedly connected to the outer surface of the bearing body (8), and an oil plug (20) is fixedly installed on the inner wall of the connecting frame (21). A gasket (19) is provided on the inner wall of the oil plug (20).

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