A slewing bearing

Abstract

The utility model provides a kind of rotary bearing, including bearing inner ring, bearing outer ring, primary roller, secondary roller, tertiary roller and sealing system;Bearing inner ring and bearing outer ring are rotatably connected by primary roller, secondary roller and tertiary roller, primary roller and secondary roller are radially arranged, and tertiary roller is axially arranged;Sealing system is provided on the two sides of the gap matched by bearing inner ring and bearing outer ring;Radial grease injection hole connection grease injection system is provided on bearing inner ring, and radial grease discharge hole connection grease discharge system is provided on bearing outer ring;It can realize that bearing interior has lubricating oil groove, outside has grease injection and grease discharge system, surface anticorrosion has long service life, high reliability.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and in particular to a rotary bearing. Background Technology

[0002] A single-point mooring system refers to an offshore engineering vessel moored at a single point to another fixed or floating structure. Single-point mooring systems are used in offshore oilfield development and are a major component of the "wellhead platform + production storage and offloading vessel + single-point mooring system" oil production method. The slewing bearing is a crucial component of a single-point mooring system. This bearing needs to withstand long-term use at sea and ensure stable operation. While operating at sea, the bearing must also be environmentally friendly and have extremely high corrosion resistance requirements due to its long-term offshore operation. To address these requirements, a slewing bearing specifically designed for this operating condition was developed for the single-point mooring system. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a slewing bearing that can achieve long service life and high reliability with an internal lubrication groove, an external grease injection and grease discharge system, and a corrosion-resistant surface.

[0004] To achieve some or all of the above objectives or other objectives, this application provides the following technical solution: a slewing bearing, comprising an inner ring, an outer ring, a first roller, a second roller, a third roller, and a sealing system; the inner ring and the outer ring are rotatably connected by the first roller, the second roller, and the third roller, wherein the first roller and the second roller are radially arranged, and the third roller is axially arranged; a sealing system is provided on both sides of the clearance between the inner ring and the outer ring; the inner ring has radial grease injection holes, and the outer ring has radial grease discharge holes.

[0005] Furthermore, the bearing outer ring includes a first outer ring and a second outer ring. The first outer ring is provided with a first axial through hole, and the second outer ring is provided with a second axial through hole that matches the first axial through hole. The bearing inner ring is provided with a third axial through hole.

[0006] Furthermore, it also includes a grease injection system, a grease discharge system, and an oil collection bottle; the grease injection system is connected to the connection between the outer ring of the bearing and the first roller through a grease injection hole, one end of the grease discharge system is connected between the second and third rollers through a grease discharge hole, and the other end of the grease discharge system is connected to the oil collection bottle.

[0007] Furthermore, the outer circumferential surface of the bearing inner ring is provided with a first oil reservoir and a second oil reservoir; the first oil reservoir is located at the connection between the bearing outer ring and the first roller, and the second oil reservoir is located at the connection between the bearing outer ring and the second roller.

[0008] Furthermore, the sealing system includes a first sealing element, which includes a first connecting body, a first sealing lip, and a second sealing lip; the first connecting body is connected to the outer ring of the bearing, and the first and second sealing lips are connected to the inner ring of the bearing; an inner ring sealing groove is formed on the outer diameter surface of the inner ring of the bearing, the first sealing lip is embedded in the inner ring sealing groove and fits against the groove wall of the inner ring sealing groove, and the second sealing lip fits against the end face of the inner ring of the bearing.

[0009] Furthermore, the sealing system includes a second sealing element, which includes a second connecting body, a third sealing lip, and a fourth sealing lip; the second connecting body is connected to the inner ring of the bearing, and the third and fourth sealing lips are connected to the outer ring of the bearing; an outer ring sealing groove is formed on the inner diameter surface of the outer ring of the bearing, the third sealing lip is embedded in the outer ring sealing groove and fits against the groove wall, and the fourth sealing lip fits against the end face of the outer ring of the bearing.

[0010] Furthermore, the surface of the slewing bearing is sequentially coated with a zinc coating and three layers of anti-corrosion paint coating.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. Through calculation and experimental verification, a special lip sealing system is adopted to enhance sealing performance and improve the service life of the sealing ring; 2. The inner ring of the bearing is specially designed with a structure with two oil storage grooves to increase the amount of grease stored inside the bearing and reduce the number of times grease is injected at sea; 3. The No. 1 and No. 2 rollers adopt a special curve modification method to reduce the edge stress of the rolling elements and the contact stress between the rolling elements and the raceway, thereby improving the bearing's load-bearing capacity and service life; 4. The inner ring of the bearing is connected to the grease injection system, and the outer ring of the bearing is connected to the grease discharge system and the oil collection bottle. This structure facilitates grease injection in a single-point device at sea and simultaneously discharges waste grease from the bearing, ensuring that the marine environment is not polluted; 5. The bearing adopts a surface anti-corrosion technology of first spraying zinc and then spraying paint, with three layers of paint of different thicknesses sprayed on the surface to increase the bearing's anti-corrosion ability and ensure that the bearing can be used at sea for a long time without rusting. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a partially enlarged schematic diagram of seal number one; Figure 4 This is a partially enlarged schematic diagram of seal No. 2; In the diagram: 1. Inner ring of bearing; 101. Axial through hole No. 3; 2. Outer ring of bearing; 3. Roller No. 1; 4. Roller No. 2; 5. Roller No. 3; 6. Grease injection hole; 7. Grease drainage hole; 8. Outer ring No. 1; 801. Axial through hole No. 1; 9. Outer ring No. 2; 901. Axial through hole No. 2; 10. Grease injection system; 11. Grease drainage system; 12. Oil collection bottle; 13. Oil reservoir No. 1; 14. Oil reservoir No. 2; 15. Seal No. 1; 16. Seal No. 2; 17. Connector No. 1; 18. First sealing lip; 19. Second sealing lip; 20. Inner ring sealing groove; 21. Connector No. 2; 22. Third sealing lip; 23. Fourth sealing lip; 24. Outer ring sealing groove. Detailed Implementation

[0013] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0014] See appendix Figure 1-4 A slewing bearing includes an inner ring 1, an outer ring 2, a first roller 3, a second roller 4, a third roller 5, and a sealing system. The inner ring 1 and the outer ring 2 are rotatably connected by the first roller 3, the second roller 4, and the third roller 5. The first roller 3 and the second roller 4 are arranged radially, and the third roller 5 is arranged axially. A sealing system is provided on both sides of the clearance between the inner ring 1 and the outer ring 2. The inner ring 1 has a radial grease injection hole 6, and the outer ring 2 has a radial grease discharge hole 7.

[0015] The bearing outer ring 2 includes a first outer ring 8 and a second outer ring 9. The first outer ring 8 is provided with a first axial through hole 801, and the second outer ring 9 is provided with a second axial through hole 901 that matches the first axial through hole 801. The bearing inner ring 1 is provided with a third axial through hole 101.

[0016] It also includes a grease injection system 10 and a grease discharge system 11; the grease injection system 10 is connected to the connection between the outer ring 2 of the bearing and the first roller 3 through the grease injection hole 6, one end of the grease discharge system 11 is connected between the second roller 4 and the third roller 5 through the grease discharge hole 7, and the other end of the grease discharge system 11 is connected to the oil collection bottle 12.

[0017] The outer circumferential surface of the inner ring 1 of the bearing is provided with a first oil reservoir 13 and a second oil reservoir 14; the first oil reservoir 13 is located at the connection between the outer ring 2 of the bearing and the first roller 3, and the second oil reservoir 14 is located at the connection between the outer ring 2 of the bearing and the second roller 4.

[0018] The sealing system includes a first seal 15, which includes a first connector 17, a first sealing lip 18, and a second sealing lip 19. The first connector 17 is connected to the outer ring 2 of the bearing, and the first sealing lip 18 and the second sealing lip 19 are connected to the inner ring 1 of the bearing. An inner ring sealing groove 20 is formed on the outer diameter surface of the inner ring 1. The first sealing lip 18 is embedded in the inner ring sealing groove 20 and fits against the groove wall of the inner ring sealing groove 20. The second sealing lip 19 fits against the end face of the inner ring 1 of the bearing.

[0019] The sealing system includes a second seal 16, which includes a second connector 21, a third sealing lip 22, and a fourth sealing lip 23. The second connector 21 is connected to the inner ring 1 of the bearing, and the third sealing lip 22 and the fourth sealing lip 23 are connected to the outer ring 2 of the bearing. An outer ring sealing groove 24 is formed on the inner diameter surface of the outer ring 2. The third sealing lip 22 is embedded in the outer ring sealing groove 24 and fits against the groove wall of the outer ring sealing groove 24. The fourth sealing lip 23 fits against the end face of the outer ring 2 of the bearing.

[0020] The bearing inner ring 1 and the bearing outer ring 2 are clearance-fitted. The first seal 15 is used to prevent grease from leaking out of the first oil reservoir 13, and the second seal 16 is used to prevent grease from leaking out of the second oil reservoir 14; at the same time, it blocks external contaminants and keeps the lubrication system clean.

[0021] The surface of the slewing bearing is coated with a zinc coating and three layers of anti-corrosion paint.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A slewing bearing, characterized in that: The bearing includes an inner ring, an outer ring, a first roller, a second roller, a third roller, and a sealing system. The inner ring and the outer ring are rotatably connected by the first roller, the second roller, and the third roller. The first roller and the second roller are arranged radially, and the third roller is arranged axially. A sealing system is provided on both sides of the clearance between the inner ring and the outer ring. The inner ring has radial grease injection holes, and the outer ring has radial grease discharge holes.

2. A slewing bearing according to claim 1, characterized in that: The bearing outer ring includes a first outer ring and a second outer ring. The first outer ring is provided with a first axial through hole, and the second outer ring is provided with a second axial through hole that matches the first axial through hole. The bearing inner ring is provided with a third axial through hole.

3. A slewing bearing according to claim 1, characterized in that: It also includes a grease injection system, a grease discharge system, and an oil collection bottle; the grease injection system is connected to the connection between the outer ring of the bearing and the first roller through a grease injection hole, one end of the grease discharge system is connected between the second and third rollers through a grease discharge hole, and the other end of the grease discharge system is connected to the oil collection bottle.

4. A slewing bearing according to claim 1, characterized in that: The outer circumferential surface of the inner ring of the bearing is provided with a first oil reservoir and a second oil reservoir; the first oil reservoir is located at the connection between the outer ring of the bearing and the first roller, and the second oil reservoir is located at the connection between the outer ring of the bearing and the second roller.

5. A slewing bearing according to claim 1, characterized in that: The sealing system includes a first sealing element, which includes a first connecting body, a first sealing lip, and a second sealing lip. The first connecting body is connected to the outer ring of the bearing, and the first and second sealing lips are connected to the inner ring of the bearing. An inner ring sealing groove is formed on the outer diameter surface of the inner ring of the bearing. The first sealing lip is embedded in the inner ring sealing groove and fits against the groove wall of the inner ring sealing groove. The second sealing lip fits against the end face of the inner ring of the bearing.

6. A slewing bearing according to claim 1, characterized in that: The sealing system includes a second sealing element, which includes a second connecting body, a third sealing lip, and a fourth sealing lip. The second connecting body is connected to the inner ring of the bearing, and the third and fourth sealing lips are connected to the outer ring of the bearing. An outer ring sealing groove is formed on the inner diameter surface of the outer ring of the bearing. The third sealing lip is embedded in the outer ring sealing groove and fits against the groove wall. The fourth sealing lip fits against the end face of the outer ring of the bearing.

7. A slewing bearing according to claim 1, characterized in that: The surface is coated with a zinc coating and three layers of anti-corrosion paint.

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