Powder metallurgy oil bearing with optimized porous structure

Abstract

The utility model discloses a powder metallurgy oil-retaining bearing with an optimized porous structure, and particularly relates to the technical field of powder metallurgy oil-retaining bearings, which comprises an oil-retaining bearing body made of powder metallurgy materials, and a porous mechanism is arranged in the oil-retaining bearing body. The porous mechanism comprises a plurality of main pores formed in the surface of the oil-retaining bearing body, a plurality of auxiliary pores are formed in the surface of the oil-retaining bearing body, an oil storage tank is formed in the oil-retaining bearing body and is communicated with the main pores and the auxiliary pores, and a porous adsorption layer is arranged on the inner wall of the oil-retaining bearing body. The oil-retaining bearing can store a large amount of lubricating oil, the lubricating oil is uniformly distributed, the lubricating oil is supplemented in time when local lubrication is insufficient, the continuity and uniformity of lubrication are guaranteed, the overall reliability and durability of the oil-retaining bearing are effectively improved, and continuous and good operation of the oil-retaining bearing under complex working conditions is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy oil-impregnated bearing technology, and more specifically, to a powder metallurgy oil-impregnated bearing with optimized porous structure. Background Technology

[0002] Powder metallurgy oil-impregnated bearings are bearings with a porous structure. During the manufacturing process, the bearing is impregnated with lubricating oil, which automatically lubricates the friction surfaces during use, thereby reducing the coefficient of friction during power transmission and maintaining the fixed position of the shaft center.

[0003] In existing mechanisms, oil-impregnated bearings are easily subjected to pressure from external sources and the shaft. If the oil-impregnated bearing has poor pressure resistance, it will cause deformation of the oil-impregnated bearing, which will reduce its service life.

[0004] A search revealed that Chinese patent CN211715547U discloses a powder metallurgy oil-impregnated bearing. This structure, with its upper and lower protrusions, transmits pressure to a pressure-relieving groove when subjected to external pressure, thus reducing the external pressure on the bearing. The convex ring can withstand pressure from the shaft, which then distributes the pressure to the pressure-relieving groove. This design allows the oil-impregnated bearing to better reduce pressure from external sources or the shaft, ensuring its compressive strength. The lubricating strip facilitates the flow of lubricating oil, which is then discharged through the oil injection hole for lubrication. The heat sink reduces the heat received by the lubricating strip, effectively extending its service life. Furthermore, the heat sink and lubricating strip are fixed together; loosening the screws allows for easy disassembly, replacement, and maintenance of both components, ensuring convenient maintenance of the oil-impregnated bearing.

[0005] However, in actual use, the lubricating oil is lubricated to the shaft through eight oil injection holes in the middle of the convex ring. Since the oil injection holes are all located in the middle of the convex ring, the lubricating oil distribution at both ends is less and the lubricating oil distribution in the middle is more, resulting in uneven distribution. This causes the thickness of the lubricating oil film between the shaft and the oil injection holes to be inconsistent, affecting the operating accuracy and stability of the equipment. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a powder metallurgy oil-impregnated bearing with optimized porous structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A porous structure optimized powder metallurgy oil-impregnated bearing includes an oil-impregnated bearing body, which is made of powder metallurgy material and has a porous structure inside.

[0009] The porous mechanism includes multiple main pores formed on the surface of the oil-impregnated bearing body, multiple auxiliary pores formed on the surface of the oil-impregnated bearing body, an oil storage tank formed inside the oil-impregnated bearing body, the oil storage tank communicating with the main pores and auxiliary pores, a porous adsorption layer provided on the inner wall of the oil-impregnated bearing body, an oil filling pipe provided through the surface of the oil-impregnated bearing body, a threaded groove formed on the surface of the oil filling pipe, and a threaded cap threadedly connected to the inside of the threaded groove.

[0010] The pore density of the porous adsorption layer is greater than that inside the bearing body, and the pore diameter of the porous adsorption layer is smaller than that of the auxiliary pores.

[0011] By adopting the above technical solution, it is beneficial to store a large amount of lubricating oil evenly. The porous adsorption layer on the inner wall has a high pore density and small diameter, which can adsorb lubricating oil and replenish it in time when there is insufficient local lubrication, ensuring continuous and uniform lubrication. The surface oil filling pipe is equipped with a threaded groove and a threaded cap, which facilitates the addition of lubricating oil and can effectively prevent impurities from entering, ensuring the cleanliness of the lubricating oil.

[0012] As a further description of the above technical solution: a wear-resistant layer is fixedly provided on the surface of the oil-impregnated bearing body. The wear-resistant layer is made of hard alloy coating. Multiple mounting grooves are opened on the surface of the wear-resistant layer. Reinforcing strips are fixedly provided inside the multiple mounting grooves. The reinforcing strips are made of high-strength alloy steel.

[0013] By adopting the above technical solutions, the bearing can directly withstand external friction and wear, significantly improve the wear resistance of the oil-impregnated bearing, extend its service life, and the combination design of the wear-resistant layer and the reinforcing strip effectively improves the overall reliability and durability of the oil-impregnated bearing, ensuring its continuous good operation under complex working conditions.

[0014] As a further description of the above technical solution: the cross-sections of the main pores and the auxiliary pores are both funnel-shaped, the main pores are arranged in a regular linear pattern, the auxiliary pores are evenly distributed between the main pores, a sealing layer is provided on one side of the threaded cap, the sealing layer is inserted into the refueling pipe, and the surface of the oil storage tank is provided with an anti-rust coating, which is made of nano-ceramic coating.

[0015] By adopting the above technical solution, the lubricating oil can flow in efficiently and be stored evenly, which can give full play to the oil storage function and ensure the lubrication effect. Moreover, the nano-ceramic anti-rust coating on the inner wall of the oil storage tank can prevent the inner wall from rusting, ensure the purity of the lubricating oil, avoid wear of bearings by rust and other impurities, and extend the service life of the bearings.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. By setting up a porous mechanism, compared with the existing technology, the main pores, auxiliary pores and oil storage tank are interconnected. The funnel-shaped cross-section facilitates the flow and storage of lubricating oil. Moreover, the main pores and auxiliary pores are reasonably distributed, so that the lubricating oil is evenly distributed in the bearing body. The storage capacity is large. When it is working, the heat and pressure changes generated by the rotation friction cause the lubricating oil to seep out from the main pores and auxiliary pores for lubrication. At the same time, the porous adsorption layer on the inner wall has a high pore density and small diameter, which can adsorb the lubricating oil and replenish it in time when the local lubrication is insufficient, ensuring the continuity and uniformity of lubrication. Furthermore, the lubrication is added through the oil filling pipe with threaded groove and threaded cap, which is convenient to operate and can effectively prevent impurities from entering, thus improving its working performance and stability.

[0018] 2. By setting up an oil-impregnated bearing body, wear-resistant layer, reinforcing strip, sealing layer, and anti-rust coating, compared with the existing technology, the wear-resistant layer on the surface of the oil-impregnated bearing body is made of hard alloy coating, which can directly resist external friction and wear, and extend the bearing life. The reinforcing strip on the wear-resistant layer is made of high-strength alloy steel, which enhances the strength and rigidity of the wear-resistant layer, so that it can maintain good performance under high load and high friction conditions and prevent damage and deformation. Moreover, the sealing layer on the threaded cap side is connected to the oil filling pipe, which can effectively block external dust and impurities from entering the bearing when not filling, avoid contamination of lubricating oil, and ensure lubrication effect. In addition, the nano-ceramic anti-rust coating on the inner wall of the oil reservoir can prevent the inner wall from rusting, ensure the quality of lubricating oil, and prevent rust and other impurities from wearing the bearing body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a cross-sectional schematic diagram of the porous mechanism of this utility model.

[0021] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0022] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0023] Figure 5 This is a schematic diagram of the overall top sectional structure of this utility model.

[0024] The attached diagram is labeled as follows: 1. Oil-impregnated bearing body; 2. Main pore; 3. Auxiliary pore; 4. Oil reservoir; 5. Porous adsorption layer; 6. Oil filling pipe; 7. Threaded groove; 8. Threaded cap; 9. Wear-resistant layer; 10. Reinforcing strip; 11. Sealing layer; 12. Rust-proof coating. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The embodiments disclosed in this application are as follows: Figure 1-5 The oil-impregnated bearing with a porous structure optimized by powder metallurgy includes an oil-impregnated bearing body 1, which is made of powder metallurgy material and has a porous structure inside.

[0027] The porous mechanism includes multiple main holes 2 formed on the surface of the oil-impregnated bearing body 1, multiple auxiliary holes 3 formed on the surface of the oil-impregnated bearing body 1, an oil storage tank 4 formed inside the oil-impregnated bearing body 1, the oil storage tank 4 communicating with the main holes 2 and the auxiliary holes 3, a porous adsorption layer 5 provided on the inner wall of the oil-impregnated bearing body 1, an oil filling pipe 6 provided through the surface of the oil-impregnated bearing body 1, a threaded groove 7 formed on the surface of the oil filling pipe 6, and a threaded cap 8 threadedly connected inside the threaded groove 7.

[0028] The pore density of the porous adsorption layer 5 is greater than that of the bearing body, and the pore diameter of the porous adsorption layer 5 is smaller than that of the auxiliary pore 3.

[0029] The oil-impregnated bearing body 1 is made of powder metallurgy material. The porous structure inside plays a key role in storing lubricating oil. The main pores 2, auxiliary pores 3 and oil storage tank 4 are interconnected to form a connected space. During the operation of the oil-impregnated bearing body 1, as the oil-impregnated bearing body 1 rotates and rubs, heat and pressure changes will be generated. At this time, the lubricating oil stored in the main pores 2 and auxiliary pores 3 will gradually seep out to lubricate.

[0030] When lubricating oil needs to be added, it is added through the filling pipe 6. The threaded groove 7 on the surface of the filling pipe 6 is threadedly connected to the threaded cap 8. After opening the threaded cap 8, the lubricating oil can flow into the oil storage tank 4 through the filling pipe 6 for storage.

[0031] Secondly, the porous adsorption layer 5 on the inner wall of the oil-impregnated bearing body 1 has a higher pore density than the pore density inside the bearing body and a smaller pore diameter than the diameter of the auxiliary pores 3. It can adsorb a certain amount of lubricating oil. Moreover, when there is insufficient lubrication in some areas of the inner wall of the oil-impregnated bearing body 1, the lubricating oil in the porous adsorption layer 5 will be replenished to the friction surface in time, further ensuring the continuity and uniformity of lubrication and effectively reducing bearing wear.

[0032] Reference Figure 2-3 As shown, a wear-resistant layer 9 is fixedly provided on the surface of the oil-impregnated bearing body 1. The wear-resistant layer 9 is made of hard alloy coating. Multiple mounting grooves are opened on the surface of the wear-resistant layer 9. Reinforcing strips 10 are fixedly provided inside the multiple mounting grooves. The reinforcing strips 10 are made of high-strength alloy steel.

[0033] Meanwhile, the wear-resistant layer 9 fixedly installed on the surface of the oil-impregnated bearing body 1 is made of hard alloy coating, which can directly withstand external friction and wear, extending the service life of the oil-impregnated bearing. At the same time, the reinforcing strips 10 fixedly installed in the multiple mounting grooves on the surface of the wear-resistant layer 9 are made of high-strength alloy steel, which further enhances the strength and rigidity of the wear-resistant layer 9, so that it can maintain good performance in high-load and high-friction working environment, and prevent the wear-resistant layer 9 from being damaged or deformed.

[0034] The sealing layer 11 on one side of the threaded cap 8 is connected to the oil filling pipe 6. When no lubricating oil is added, it can effectively prevent external dust, impurities and other contaminants from entering the oil-impregnated bearing body 1, thus avoiding these impurities from contaminating the lubricating oil and affecting the lubrication effect.

[0035] Reference Figure 4-5 As shown, the cross-sections of the main pore 2 and the auxiliary pore 3 are both funnel-shaped. The main pore 2 is arranged in a regular linear pattern, and the auxiliary pore 3 is evenly distributed between the main pores. A sealing layer 11 is provided on one side of the threaded cap 8. The sealing layer 11 is inserted into the oil filling pipe 6. The surface of the oil storage tank 4 is provided with an anti-rust coating 12, which is made of nano-ceramic coating.

[0036] Since the cross-sections of the main pores 2 and the auxiliary pores 3 are set in a funnel shape, this shape is conducive to the inflow and storage of lubricating oil. The main pores 2 are arranged in a regular linear pattern, and the auxiliary pores 3 are evenly distributed between the main pores, so that the lubricating oil can be evenly distributed inside the entire oil-impregnated bearing body 1.

[0037] The anti-rust coating 12 on the inner wall of the oil reservoir 4 is made of nano-ceramic coating, which can prevent the inner wall of the oil reservoir 4 from rusting, ensure the quality of the lubricating oil, and also prevent impurities such as rust from mixing into the lubricating oil and causing wear to the oil-impregnated bearing body 1. It achieves good functions such as lubricating oil storage, lubrication, wear resistance, sealing and rust prevention, and improves the working performance and service life of the oil-impregnated bearing body 1.

[0038] Working principle of this utility model:

[0039] This utility model is a powder metallurgy oil-impregnated bearing with optimized porous structure. When the device is in use, the oil-impregnated bearing body 1 is made of powder metallurgy material. The internal porous structure plays a key role in storing lubricating oil. The main pores 2, auxiliary pores 3 and oil storage tank 4 are interconnected to form a connected space. During the operation of the oil-impregnated bearing body 1, heat and pressure changes are generated as the oil-impregnated bearing body 1 rotates and rubs. At this time, the lubricating oil stored in the main pores 2 and auxiliary pores 3 will gradually seep out to lubricate.

[0040] When lubricating oil needs to be added, it is added through the filling pipe 6. The threaded groove 7 on the surface of the filling pipe 6 is threadedly connected to the threaded cap 8. After opening the threaded cap 8, the lubricating oil can flow into the oil storage tank 4 through the filling pipe 6 for storage.

[0041] Since the cross-sections of the main pores 2 and the auxiliary pores 3 are set in a funnel shape, this shape is conducive to the inflow and storage of lubricating oil. The main pores 2 are arranged in a regular linear pattern, and the auxiliary pores 3 are evenly distributed between the main pores, so that the lubricating oil can be evenly distributed inside the entire oil-impregnated bearing body 1.

[0042] Secondly, the porous adsorption layer 5 on the inner wall of the oil-impregnated bearing body 1 has a higher pore density than the pore density inside the bearing body and a smaller pore diameter than the diameter of the auxiliary pores 3. It can adsorb a certain amount of lubricating oil. Moreover, when there is insufficient lubrication in some areas on the inner wall of the oil-impregnated bearing body 1, the lubricating oil in the porous adsorption layer 5 will be replenished to the friction surface in time, further ensuring the continuity and uniformity of lubrication and effectively reducing the wear of the bearing.

[0043] Meanwhile, the wear-resistant layer 9 fixedly installed on the surface of the oil-impregnated bearing body 1 is made of hard alloy coating, which can directly withstand external friction and wear, extending the service life of the oil-impregnated bearing. At the same time, the reinforcing strips 10 fixedly installed in the multiple mounting grooves on the surface of the wear-resistant layer 9 are made of high-strength alloy steel, which further enhances the strength and rigidity of the wear-resistant layer 9, so that it can maintain good performance in high-load and high-friction working environment, and prevent the wear-resistant layer 9 from being damaged or deformed.

[0044] The sealing layer 11 on one side of the threaded cap 8 is connected to the oil filling pipe 6. When no lubricating oil is added, it can effectively prevent external dust, impurities and other contaminants from entering the oil-impregnated bearing body 1, thus avoiding these impurities from contaminating the lubricating oil and affecting the lubrication effect.

[0045] The anti-rust coating 12 on the inner wall of the oil reservoir 4 is made of nano-ceramic coating, which can prevent the inner wall of the oil reservoir 4 from rusting, ensure the quality of the lubricating oil, and also prevent impurities such as rust from mixing into the lubricating oil and causing wear to the oil-impregnated bearing body 1. It achieves good functions such as lubricating oil storage, lubrication, wear resistance, sealing and rust prevention, and improves the working performance and service life of the oil-impregnated bearing body 1.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A porous structure optimized powder metallurgy oil-impregnated bearing, comprising an oil-impregnated bearing body (1), characterized in that: The oil-impregnated bearing body (1) is made of powder metallurgy material, and the interior of the oil-impregnated bearing body (1) is provided with a porous structure; The porous structure includes multiple main holes (2) formed on the surface of the oil-impregnated bearing body (1), multiple auxiliary holes (3) formed on the surface of the oil-impregnated bearing body (1), an oil storage tank (4) formed inside the oil-impregnated bearing body (1), the oil storage tank (4) communicating with the main holes (2) and the auxiliary holes (3), a porous adsorption layer (5) provided on the inner wall of the oil-impregnated bearing body (1), an oil filling pipe (6) formed through the surface of the oil-impregnated bearing body (1), a threaded groove (7) formed on the surface of the oil filling pipe (6), and a threaded cap (8) threadedly connected inside the threaded groove (7).

2. The porous structure optimized powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: The pore density of the porous adsorption layer (5) is greater than that of the bearing body, and the pore diameter of the porous adsorption layer (5) is smaller than that of the auxiliary pore (3).

3. The porous structure optimized powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: The surface of the oil-impregnated bearing body (1) is fixedly provided with a wear-resistant layer (9), which is made of a hard alloy coating.

4. The porous structure optimized powder metallurgy oil-impregnated bearing according to claim 3, characterized in that: The wear-resistant layer (9) has multiple mounting grooves on its surface, and each of the multiple mounting grooves has a reinforcing strip (10) fixedly installed inside. The reinforcing strip (10) is made of high-strength alloy steel.

5. The porous structure optimized powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: The cross-sections of the main pores (2) and the auxiliary pores (3) are both funnel-shaped. The main pores (2) are arranged in a regular linear pattern, and the auxiliary pores (3) are evenly distributed between the main pores.

6. The porous structure optimized powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: A sealing layer (11) is provided on one side of the threaded cap (8), the sealing layer (11) is inserted into the oil filling pipe (6), and the surface of the oil storage tank (4) is provided with an anti-rust coating (12), the anti-rust coating (12) is made of nano-ceramic coating.

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