Novel three-layer sealing structure of slewing bearing
By adopting a three-layer sealing structure in the rotary bearing, including two layers of rubber sealing rings and one layer of metal sealing rings, the problem of poor sealing effect in harsh environments is solved, and good sealing performance and durability are achieved.
Patent Information
- Application Number
- CN202421495641.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing rotary bearings have poor sealing effect in harsh environments, making it difficult to effectively prevent the invasion of moisture, wind, sand and dust.
A three-layer sealing structure is adopted, including two rubber sealing rings and one metal sealing ring. The sealing ring is fixed by screws and spring pads, and a steel ball and isolation ball are arranged between the sealing ring and sealing ring to enhance sealing performance.
It achieves good sealing performance and durability in harsh environments, can effectively prevent external intrusion and ensure the normal operation of the bearing.
Smart Images
Figure CN222559003U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, in particular to a new three-layer sealing structure of a slewing bearing. Background Art
[0002] The seal of the existing slewing bearing is a single-layer or single-layer multi-lip rubber seal structure. The bearing works in the open air, such as at the seaside or offshore, where seawater and moisture intrusion, or in a harsh environment with heavy rain, sand, and dust, the sealing effect of the bearing is not ideal for a long time. In order to ensure that the bearing can work in harsh environments, the sealing structure and sealing performance of the bearing are the main research and development topics. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a new three-layer sealing structure of a slewing bearing.
[0004] In order to solve the above technical problems, the technical solution of the utility model is: a new three-layer sealing structure of a slewing bearing, including a seat ring and a shaft ring, two layers of sealing rings and a layer of sealing spacer are arranged between at least one end face of the seat ring and the shaft ring, and the sealing spacer is located between the two layers of sealing rings; steel balls and isolation balls are arranged around and spaced between the seat ring and the shaft ring.
[0005] Further, the sealing spacer is fixed by screws and spring washers.
[0006] Furthermore, when the end face of the shaft ring is higher than the end face of the seat ring, two layers of sealing rings are arranged in the annular groove of the shaft ring, the sealing spacer is fixed on the seat ring, and the gap between the sealing spacer and the shaft ring is ≤1mm.
[0007] Furthermore, when the end face of the seat ring is higher than the end face of the shaft ring, two layers of sealing rings are arranged in the annular groove of the seat ring, the sealing spacer is fixed on the shaft ring, and the gap between the sealing spacer and the seat ring is ≤1mm.
[0008] Furthermore, the sealing spacer is in interference contact with a sealing lip protruding from the outer sealing ring.
[0009] Furthermore, the sealing lip protruding from the inner sealing ring is in interference contact with the contacting end surface.
[0010] Furthermore, the sealing ring is a rubber sealing ring.
[0011] Furthermore, the sealing spacer is a metal sealing spacer.
[0012] The utility model has good sealing performance and durability and is suitable for use in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model.
[0014] Among them: 1. Seat ring; 2. Shaft ring; 3. Steel ball; 4. Sealing ring; 5. Sealing spacer; 6. Isolation ball; 7. Screw; 8. Spring washer. DETAILED DESCRIPTION
[0015] The following is combined with Figure 1 The specific implementation methods of the utility model are further described.
[0016] The new three-layer sealing structure of the slewing bearing includes a seat ring 1 and a shaft ring 2. Two layers of sealing rings 4 and one layer of sealing spacer 5 are arranged between at least one end face of the seat ring 1 and the shaft ring 2. The sealing spacer 5 is located between the two layers of sealing rings 4 and is fixed by screws 7 and spring washers 8. Steel balls 3 and isolation balls 6 are arranged around and spaced between the seat ring 1 and the shaft ring 2 to simultaneously withstand radial force, axial force and tilting moment. When the end face of the shaft ring 2 is higher than the end face of the seat ring 1, the two layers of sealing rings 4 are arranged in the annular groove of the shaft ring 2, the sealing spacer 5 is fixed on the seat ring 1, and the gap between the sealing spacer 5 and the shaft ring 2 is ≤1mm. When the end face of the seat ring 1 is higher than the end face of the shaft ring 2, the two layers of sealing rings 4 are arranged in the annular groove of the seat ring 1, the sealing spacer 5 is fixed on the shaft ring 2, and the gap between the sealing spacer 5 and the seat ring 1 is ≤1mm. The sealing spacer 5 is in interference contact with the sealing lip protruding from the outer sealing ring 4. The sealing lip of the inner sealing ring 4 is in interference contact with the contacting end face. The sealing ring 4 is a rubber sealing ring. The sealing spacer 5 is a metal sealing spacer.
[0017] The bearing is sealed on two end ring surfaces of the outer end ring of the shaft ring 2 and the inner end ring of the seat ring 1 in order to improve the sealing performance of the bearing in harsh environments.
[0018] When the end face of the shaft ring 2 is higher than the end face of the seat ring 1, the structure is that there are two upper and lower sealing grooves on the outer diameter surface of the shaft ring 2, and a sealing ring 4 is installed. In the middle of the two layers of sealing rings 4, there is a sealing spacer 5 fixed on the seat ring 1 by screws 7. The inclined surface of the sealing spacer 5 and the sealing lip of the outer sealing ring 4 are in interference contact, and there is a small gap of ≤1mm between the sealing spacer 5 and the outer diameter surface of the shaft ring 2. Grease can be injected into the gap to ensure better sealing. The sealing lip of the inner sealing ring 4 is in interference contact with the end face of the seat ring 1. Therefore, the new structural seal forms a three-layer seal.
[0019] If the end face of the seat ring 1 is higher than the shaft ring 2, the two layers of sealing rings 4 should be fixed in the two grooves of the inner end ring diameter of the seat ring 1. The sealing spacer 5 is fixed on the end face of the shaft ring 2 by screws 7 and placed in the middle of the two sealing rings 4 with the same matching clearance and interference as mentioned above.
[0020] This structure can maintain good sealing performance in adverse environments such as strong winds, rainstorms, and the intrusion of sea tides.
[0021] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, shall be covered by the protection scope of the utility model.
Claims
1. The new three-layer sealing structure of the slewing bearing is characterized by: The invention comprises a seat ring (1) and a shaft ring (2); two layers of sealing rings (4) and a layer of sealing spacer (5) are arranged between at least one end surface of the seat ring (1) and the shaft ring (2); the sealing spacer (5) is located between the two layers of sealing rings (4); and steel balls (3) and isolation balls (6) are arranged in a surrounding manner between the seat ring (1) and the shaft ring (2).
2. The three-layer sealing novel structure of the slewing bearing according to claim 1 is characterized in that: The sealing spacer (5) is fixed by screws (7) and spring washers (8).
3. The three-layer sealing novel structure of the slewing bearing according to claim 1 is characterized in that: When the end face of the shaft ring (2) is higher than the end face of the seat ring (1), two layers of sealing rings (4) are arranged in the annular groove of the shaft ring (2), the sealing spacer (5) is fixed on the seat ring (1), and the gap between the sealing spacer (5) and the shaft ring (2) is ≤1 mm.
4. The three-layer sealing novel structure of the slewing bearing according to claim 1 is characterized in that: When the end face of the seat ring (1) is higher than the end face of the shaft ring (2), two layers of sealing rings (4) are arranged in the annular groove of the seat ring (1), the sealing spacer (5) is fixed on the shaft ring (2), and the gap between the sealing spacer (5) and the seat ring (1) is ≤1 mm.
5. The three-layer sealing novel structure of the slewing bearing according to claim 3 or 4 is characterized in that: The sealing spacer (5) is in interference contact with the sealing lip protruding from the outer sealing ring (4).
6. The three-layer sealing novel structure of the slewing bearing according to claim 3 or 4 is characterized in that: The sealing lip protruding from the sealing ring (4) of the inner layer is in interference contact with the contacting end surface.
7. The three-layer sealing novel structure of the slewing bearing according to claim 1 is characterized in that: The sealing ring (4) is a rubber sealing ring.
8. The three-layer sealing novel structure of the slewing bearing according to claim 1 is characterized in that: The sealing spacer (5) is a metal sealing spacer.