A bearing with corrosion protection

Abstract

The application provides a bearing with corrosion resistance, relates to the field of mechanical transmission parts, and comprises an outer ring, the inside of the outer ring is provided with a middle ring, the inside of the middle ring is provided with an inner ring, a retainer is arranged between the outer ring and the middle ring, a retainer is also arranged between the middle ring and the inner ring, and the inside of the two retainers is provided with a rolling body. The bearing is formed by the cooperation of the outer ring, the middle ring, the inner ring and the sealing cover, the first sealing cover and the second sealing cover are embedded with the middle ring and the inner ring, a narrow and circuitous sealing channel is formed, the invasion of external moisture, dust and chemical corrosion medium is effectively blocked, the overall corrosion resistance and service life of the bearing in a harsh environment are effectively improved, a dacromet coating is arranged on the exposed surface, physical and electrochemical protection are provided, the bearing can calmly cope with the erosion of high humidity, high salinity and various chemical media, and the corrosion resistance is further improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission components, and more specifically, to a bearing with corrosion resistance. Background Technology

[0002] Bearings are an indispensable basic component in modern mechanical equipment. Their function is to support rotating mechanical bodies, reduce the coefficient of friction during their movement, and ensure their rotational accuracy.

[0003] However, in environments with high humidity or strong corrosive media, such as chemical, marine, food processing, electroplating, and sewage treatment industries, conventional GCr15 high-carbon chromium steel bearings are highly susceptible to corrosion. Once the bearing rusts, it will not only cause poor operation, noise, and vibration, but also accelerate wear, significantly shorten its service life, and even cause equipment failure. In the existing technology, although stainless steel bearings are used to improve corrosion resistance, the cost is high, and its hardness and wear resistance are still somewhat inferior to high-carbon chromium steel. In addition, although all-ceramic bearings have excellent corrosion resistance, they are expensive and brittle, making them difficult to withstand impact loads. In view of this, we propose a corrosion-resistant bearing to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem of poor corrosion resistance in some bearings.

[0005] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a corrosion-resistant bearing, comprising an outer ring, an inner ring and a middle ring, and a cage between the outer and middle rings, and also between the middle and inner rings. Rolling elements are disposed within both cages. A sealing assembly is provided on the surface of the outer ring, and a guide groove is formed therein. The sealing assembly includes a first sealing cap and a second sealing cap, which are respectively fixedly connected to the two side surfaces of the outer ring. A first annular chamber is formed inside the first sealing cap, and a first transverse groove is formed on the inner wall of the first annular chamber. A first oblique groove is formed on the inner wall of the first transverse groove, facing between the outer and middle rings. A second annular chamber is formed inside the second sealing cap, and a second transverse groove is formed on the inner wall of the second transverse groove, facing between the middle and inner rings.

[0006] As a preferred technical solution of this application, the first sealing cover has a first channel inside, and the first channel is connected to the first annular chamber.

[0007] As a preferred technical solution of this application, the second sealing cover has a second channel inside, and the second channel is connected to the second annular chamber.

[0008] As a preferred technical solution of this application, a sealing groove is provided at the top of both the first channel and the second channel, and a threaded protrusion is provided inside the sealing groove.

[0009] As a preferred technical solution of this application, the sealing groove is provided with bolts inside, and the bolts are threadedly connected to the sealing groove through threaded protrusions.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. Through the cooperation between the outer ring, middle ring, inner ring and sealing cover and other structures, the first sealing cover and the second sealing cover are interlocked with the middle ring and inner ring to form a narrow and tortuous sealing channel, which can effectively block the intrusion of external moisture, dust and chemical corrosive media, effectively improving the overall corrosion resistance and service life of the bearing in harsh environments. In addition, by applying Dacromet coating to the exposed surface, physical and electrochemical protection is provided, enabling the bearing to cope with the erosion of high humidity, high salinity and various chemical media, further improving corrosion resistance and extending service life. 2. Through the cooperation between the structure of the first annular chamber, the first transverse groove, the first inclined groove, the second annular chamber, the second transverse groove, and the second inclined groove, the lubricating oil stored in the annular chamber can be transported and evenly added to the working surface of each raceway by means of centrifugal force when the bearing rotates, which effectively improves the lubrication reliability of the bearing during long-term operation and reduces wear. Attached Figure Description

[0011] Figure 1 A schematic diagram of the structure of the corrosion-resistant bearing provided in this application; Figure 2 A schematic diagram of the outer ring of a corrosion-resistant bearing provided for this application; Figure 3 A cross-sectional structural schematic diagram of the first sealing cover in a corrosion-resistant bearing provided for this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 A cross-sectional view of the second sealing cap in a corrosion-resistant bearing provided for this application; Figure 6 for Figure 3 Enlarged view of point B in the middle; Figure 7 A schematic diagram of the structure of the first and second sealing caps provided in this application.

[0012] The image shows: 1. Outer ring; 2. First sealing cap; 3. Second sealing cap; 4. First annular chamber; 5. First transverse groove; 6. First inclined groove; 7. Middle ring; 8. Inner ring; 9. Cage; 10. Rolling element; 11. Second annular chamber; 12. First channel; 13. Sealing groove; 14. Threaded protrusion; 15. Bolt; 16. Guide groove; 17. Second channel; 18. Second transverse groove; 19. Second inclined groove. Detailed Implementation

[0013] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 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 should fall within the protection scope of the present invention.

[0014] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0015] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] Example 1

[0018] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 A corrosion-resistant bearing includes an outer ring 1, a middle ring 7 inside the outer ring 1, an inner ring 8 inside the middle ring 7, a cage 9 between the outer ring 1 and the middle ring 7, and a cage 9 between the middle ring 7 and the inner ring 8. Rolling elements 10 are housed inside both cages 9. The cages 9 effectively ensure the stability of the rolling elements 10. Annular grooves for accommodating the rolling elements 10 are formed on the surfaces of the outer ring 1, the middle ring 7, and the inner ring 8. A sealing assembly is provided on the surface of the outer ring 1, and a guide groove 16 is formed on the surface of the outer ring 1 to facilitate cooperation with an external guide rail.

[0019] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the sealing assembly includes a first sealing cap 2 and a second sealing cap 3. The first sealing cap 2 and the second sealing cap 3 are respectively fixedly connected to the two sides of the outer ring 1. The first sealing cap 2 and the second sealing cap 3 can be fixed to the surface of the outer ring 1 by laser welding. The first sealing cap 2 and the second sealing cap 3 can be interlocked with the middle ring 7 and the inner ring 8 to form a dynamic seal. The seal is achieved by using a labyrinth structure, and the sealing effect is improved by using narrow and tortuous channels.

[0020] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the first sealing cover 2 has a first annular chamber 4 for storing lubricating oil inside. The inner wall of the first annular chamber 4 has a first transverse groove 5 for the flow of lubricating oil. The inner wall of the first transverse groove 5 has a first inclined groove 6 for the flow of lubricating oil. The first inclined groove 6 faces between the outer ring 1 and the middle ring 7. When the bearing rotates, the lubricating oil inside the first annular chamber 4 will enter the interior of the first transverse groove 5 under the action of centrifugal force. Subsequently, the lubricating oil will enter the interior of the first inclined groove 6 until the lubricating oil is thrown from the interior of the first inclined groove 6 into the space between the outer ring 1 and the middle ring 7, thereby achieving lubrication between the outer ring 1 and the middle ring 7.

[0021] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the interior of the second sealing cover 3 is provided with a second annular chamber 11 for storing lubricating oil. The inner wall of the second annular chamber 11 is provided with a second transverse groove 18 for the flow of lubricating oil. The inner wall of the second transverse groove 18 is provided with a second inclined groove 19 for the flow of lubricating oil. The second inclined groove 19 faces the space between the middle ring 7 and the inner ring 8. Similarly, the lubricating oil inside the second annular chamber 11 will enter the space between the middle ring 7 and the inner ring 8 through the second transverse groove 18 and the second inclined groove 19, thereby achieving lubrication between the middle ring 7 and the inner ring 8.

[0022] The cooperation between the first sealing cover 2 and the second sealing cover 3 further ensures the sealing effect inside the shaft body, effectively preventing the intrusion of external moisture, dust and chemical media, thereby improving the corrosion resistance of the shaft body.

[0023] In the above embodiments, all exposed surfaces of the outer ring 1, middle ring 7, inner ring 8, first sealing cover 2, and second sealing cover 3 are coated with a dense Dacromet coating through dip coating or spray coating processes, thereby providing additional and long-lasting electrochemical protection for the stainless steel substrate. Furthermore, the outer ring 1, middle ring 7, inner ring 8, and other structures are all made of martensitic stainless steel, and the rolling element 10 is a ceramic ball, preferably a silicon nitride ceramic ball, which fundamentally improves the corrosion resistance of the substrate.

[0024] Example 2

[0025] The corrosion-resistant bearing provided in Example 1 is further optimized, specifically, as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the first sealing cover 2 has a first channel 12 for injecting lubricating oil inside. The first channel 12 is connected to the first annular chamber 4. The arrangement of the first channel 12 facilitates the injection of lubricating oil into the first annular chamber 4.

[0026] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the interior of the second sealing cover 3 is provided with a second channel 17 for injecting lubricating oil. The second channel 17 is connected to the second annular chamber 11. The arrangement of the second channel 17 facilitates the injection of lubricating oil into the interior of the second annular chamber 11.

[0027] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the top of both the first channel 12 and the second channel 17 is provided with a sealing groove 13, and the inside of the sealing groove 13 is provided with a threaded protrusion 14.

[0028] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a bolt 15 is provided inside the sealing groove 13. The bolt 15 is threadedly connected to the sealing groove 13 through the threaded protrusion 14, thereby achieving a seal on the first channel 12 and the second channel 17, effectively preventing external dust from entering the interior of the annular chamber.

[0029] The corrosion-resistant bearing provided by this utility model is used as follows: The first sealing cap 2 and the second sealing cap 3 are fixed to the two sides of the outer ring 1 by laser welding, and the first sealing cap 2 and the second sealing cap 3 are interlocked with the middle ring 7 and the inner ring 8 to form a seal. The seal is achieved by using a labyrinth structure, and the sealing effect is improved by using narrow and tortuous channels.

[0030] When the shaft body needs to be lubricated later, the two bolts 15 are rotated respectively. After the bolts 15 are dislodged from the inside of the sealing groove 13, external lubricating oil is injected into the first annular chamber 4 and the second annular chamber 11 through the first channel 12 and the second channel 17 respectively. Then, the two oil injection channels are closed with the help of the bolts 15.

[0031] When the bearing rotates, the lubricating oil inside the first annular chamber 4 will enter the first transverse groove 5 under the action of centrifugal force, and then the lubricating oil will enter the first inclined groove 6 until the lubricating oil is thrown from the first inclined groove 6 into the space between the outer ring 1 and the middle ring 7, thereby achieving lubrication between the outer ring 1 and the middle ring 7. Similarly, the lubricating oil inside the second annular chamber 11 will enter the space between the middle ring 7 and the inner ring 8 through the second transverse groove 18 and the second inclined groove 19, thereby achieving lubrication between the middle ring 7 and the inner ring 8, thus ensuring the convenience and uniformity of lubricating oil addition.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A bearing with corrosion resistance, characterized in that, It includes an outer ring (1), a middle ring (7) is provided inside the outer ring (1), an inner ring (8) is provided inside the middle ring (7), a retainer (9) is provided between the outer ring (1) and the middle ring (7), and a retainer (9) is also provided between the middle ring (7) and the inner ring (8). Rolling elements (10) are provided inside both retainers (9). A sealing component is provided on the surface of the outer ring (1), and a guide groove (16) is opened on the surface of the outer ring (1). The sealing assembly includes a first sealing cap (2) and a second sealing cap (3), which are respectively fixedly connected to the two sides of the outer ring (1). The first sealing cover (2) has a first annular chamber (4) inside, the inner wall of the first annular chamber (4) has a first transverse groove (5), the inner wall of the first transverse groove (5) has a first inclined groove (6), and the first inclined groove (6) faces between the outer ring (1) and the middle ring (7). The second sealing cover (3) has a second annular chamber (11) inside. The inner wall of the second annular chamber (11) has a second transverse groove (18). The inner wall of the second transverse groove (18) has a second inclined groove (19). The second inclined groove (19) faces between the middle ring (7) and the inner ring (8).

2. The bearing with corrosion resistance according to claim 1, characterized in that, The first sealing cover (2) has a first channel (12) inside, and the first channel (12) is connected to the first annular chamber (4).

3. A corrosion-resistant bearing according to claim 2, characterized in that, The second sealing cover (3) has a second channel (17) inside, and the second channel (17) is connected to the second annular chamber (11).

4. A corrosion-resistant bearing according to claim 3, characterized in that, The top of the first channel (12) and the second channel (17) are provided with sealing grooves (13), and the inside of the sealing grooves (13) is provided with threaded protrusions (14).

5. A corrosion-resistant bearing according to claim 4, characterized in that, The sealing groove (13) is provided with a bolt (15) inside, and the bolt (15) is threadedly connected to the sealing groove (13) through a threaded protrusion (14).

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