CN218377678U

CN218377678U - Sealing element and rolling bearing

Info

Publication number: CN218377678U
Application number: CN202222320818.4U
Authority: CN
Inventors: 张雷; 刘凤永; 汤卫斌; 李金峰
Original assignee: Xuzhou Rothe Erde Slewing Bearing Co Ltd
Current assignee: Xuzhou Rothe Erde Slewing Bearing Co Ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-01-24
Anticipated expiration: 2032-09-01

Abstract

The utility model relates to a sealing member and antifriction bearing. The seal includes: a protective seal and a functional seal, the protective seal and the functional seal being connected together; the protective seal includes: a protective seal body extending in a horizontal direction, a first seal lip extending downward from the protective seal body, and at least two connecting ribs protruding from the protective seal body toward the functional seal; the functional seal includes: a functional seal main body extending in a horizontal direction, an abutting portion extending downward from the functional seal main body, and an attachment portion extending upward from the functional seal main body; the connecting rib of the shield seal is connected with the attachment portion of the functional seal so that the shield seal and the functional seal are connected together.

Description

Sealing element and rolling bearing

Technical Field

The present invention relates to a sealing member, and more particularly to a sealing member for sealing a gap between an inner ring and an outer ring in a slewing bearing, and to a rolling bearing including the sealing member and the slewing bearing.

Background

A slewing bearing in wind power equipment, such as a pitch bearing or a yaw bearing, generally comprises an outer ring and an inner ring which are concentrically arranged and can rotate relatively, and a sealing element is generally arranged between the outer ring and the inner ring to seal a gap between the inner ring and the outer ring and prevent lubricant from leaking and also prevent a pollution area such as external dust from entering the inside of the bearing to influence the performance of the bearing.

In order to meet the corrosion prevention requirement of the slewing bearing, the surface of the slewing bearing is generally subjected to spraying treatment. But the spraying process can cause damage to the sealing element, so before the spraying process, the functional sealing element needs to be replaced by a protective sealing element with lower price, the functional sealing element is replaced after the spraying is finished, the sealing element is disassembled and assembled twice, and the process flow complexity, the labor and the production cost can be increased.

Therefore, the novel sealing device aims to solve the technical problems of complex process and increased cost caused by repeated replacement of the sealing element in the prior art.

It is noted herein that the information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention, and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model provides a sealing member to slewing bearing to among the wind power equipment carries out effective sealing, solves the problem that the sealing member needs to be changed repeatedly.

According to an aspect of the present invention, there is provided a sealing member, the sealing member including: a protective seal and a functional seal, the protective seal and the functional seal being connected together; wherein the protective seal comprises: a protective seal body extending in a horizontal direction, a first seal lip extending downward from the protective seal body, and at least two connecting ribs protruding from the protective seal body toward the functional seal; the functional seal includes: a functional seal main body extending in a horizontal direction, an abutting portion extending downward from the functional seal main body, and an attachment portion extending upward from the functional seal main body; the at least two webs of the shield seal are connected with the attachment portion of the functional seal such that the shield seal and the functional seal are connected together.

Optionally, the abutting portion of the functional seal extends downward and is inclined toward the protective seal, and the abutting portion has a first inclination angle with the horizontal direction, and the first inclination angle is in a range of 30-60 degrees, and more preferably 40-50 degrees.

Optionally, the outer periphery of the functional seal body has a fir tree profile including a plurality of protrusions.

Optionally, the centerline of the functional seal is X; the centerline of the protective seal body is X1, with X1 located above X.

Optionally, the protective seal is integrally formed with the functional seal using rubber.

According to another aspect of the present invention, there is provided a rolling bearing comprising the novel aforementioned sealing element and a slewing bearing for mounting the sealing element, the slewing bearing comprising an inner ring and an outer ring, the inner ring and the outer ring being rotatable with respect to each other about a vertical axis of rotation, the sealing element being disposed between the inner ring and the outer ring.

Further, the functional seal body of the functional seal mates with the groove of the exterior face of one of the inner and outer rings, the abutment of the functional seal and the first sealing lip of the shield seal pressing against the upper face of the other of the inner and outer rings.

Preferably, the slewing bearing is a pitch bearing or a yaw bearing to be painted.

The sealing element provided by the novel sealing element comprises a functional sealing element and a protective sealing element, the protective sealing element plays a role of isolating and protecting the functional sealing element, and can be easily separated from the functional sealing element after the isolation protection requirement is finished, so that the problems of complex process and high cost caused by the replacement of the sealing element in the front and back directions are solved; the risk of sealing oil leakage is reduced, and the service lives of the sealing piece and the rolling bearing are prolonged.

Drawings

FIG. 1 illustrates one embodiment of the present novel seal;

figure 2 shows one of the structural schematics of the seal of the present invention installed between an inner ring and an outer ring.

Detailed Description

The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

The present invention provides a vertical position relation represented by "upper", "lower", "upward", "downward", but not limited to vertical upper and vertical lower, and the skilled in the art can understand that the upper and lower inclined parts all belong to the range indicated by "upper" and "lower", and the upper and lower inclined parts all belong to the range indicated by "upward" and "downward".

The technical problem solved by the present invention can be achieved by the following preferred embodiments.

The utility model discloses a sealing member 100 is used for sealed slewing bearing's bearing clearance, as shown in FIG. 1, sealing member 100 includes: a protective seal 1 and a functional seal 2, the protective seal 1 being located on one side of the functional seal 2. As shown in fig. 2, the slewing bearing includes an inner ring 3 and an outer ring 4, the seal 100 is disposed between the inner ring 3 and the outer ring 4, the inner ring 3 and the outer ring 4 are relatively rotatable around a rotation axis in a vertical direction, a direction away from the slewing bearing is referred to as an upper direction, and a direction toward the slewing bearing is referred to as a lower direction.

Further, the shield seal 1 includes: a protective seal body 10, said protective seal body 10 extending in a horizontal direction; a first seal lip 11 extending downward from the shield seal body 10; and at least two connecting ribs 12 projecting from the protective seal body 10 toward the functional seal 2. Fig. 1 shows a case where the functional seal 1 includes two connecting ribs 12, but the number may be two or more, such as three, four, or more.

The functional seal 2 includes: a functional seal body 20, the functional seal body 20 extending in a horizontal direction; an abutting portion 21 extending downward from the functional seal body 20, and an attaching portion 22 extending upward from the functional seal body 20. The connecting rib 12 of the protective seal 1 is connected with the attachment portion 22 of the functional seal so that the protective seal 1 and the functional seal 2 are connected together, and the protective seal 1 and the functional seal 2 can be integrally formed by using rubber.

The inner ring 3 has a groove 30 on its outer face 31, and as shown in fig. 1 and 2, the outer periphery of the functional seal body 20 has a profile 23 that mates with the groove 30 of the inner ring 3, the profile 23 may be a fir tree profile with a plurality of protrusions to achieve a tight fit seal with the groove 30. The first sealing lip 11 of the protective seal 1 and the abutment 21 of the functional seal 2 bear against the upper face 41 of the outer ring 4. Preferably, the abutting portion 21 of the functional seal 2 extends downward and is inclined toward the outer ring 4, increasing the contact area of the abutting portion 21 with the upper face 41 in this embodiment, thereby enhancing the sealing effect. Preferably, the abutment portion 21 has a first inclination angle α 1 with the horizontal direction, preferably in the range of 30-60 °, more preferably 40-50 °, more preferably 45 °.

Although in the present embodiment it is shown that the outer face setting groove 30 of the inner ring 3 cooperates with the functional seal body 20 and the abutment portion 21 of the functional seal and the first sealing lip 11 of the shield seal 1 cooperate with the upper face of the outer ring 4, it is also possible that the outer face setting groove of the outer ring 4 cooperates with the functional seal body 20 and, correspondingly, the abutment portion of the functional seal and the first sealing lip of the shield seal cooperate with the upper face of the inner ring.

The centerline of the functional seal body 20 is the X axis in the horizontal direction; the centerline of the protective seal body 10 is X1, and preferably X1 is located further up, i.e., further away from the side of the slewing bearing, than X, which facilitates separation of the protective seal 1 and the functional seal 2.

After the spraying of the slewing bearing is finished, the protective sealing element 1 can be torn off from the functional sealing element 2, the connecting rib 12 is broken, and only the functional sealing element 2 is left to play a sealing role, so that the sealing element does not need to be replaced. Preferably, the protective seal 1 and the functional seal 2 are integrally formed, and the material of the seal may be an elastic material such as rubber, and is preferably extrusion molded from a Nitrile Butadiene Rubber (NBR), a Hydrogenated Nitrile Butadiene Rubber (HNBR), or a fluoro elastomer (FKM).

The utility model discloses a sealing member includes functional seal spare and protection sealing member two parts, and the protection sealing member plays the effect of isolation protection functional seal spare and does not receive the influence of some technologies with the protection functional seal spare, for example the influence of spraying technology, and the slewing bearing that is particularly suitable for needs the spraying if become oar supporting, driftage supporting. After the spraying is finished, the protective seal can be easily separated from the functional seal. The design of two sealing members has also avoided the grease that leads to in the change process to leak, blocks pollutants such as dust and foreign matter and causes the influence to the bearing performance in getting into antifriction bearing from the outside, has promoted sealing performance, has improved life.

The foregoing disclosure of embodiments of the present disclosure has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise form disclosed. Many variations and modifications of the embodiments described herein will be apparent to one of ordinary skill in the art in light of the above disclosure. Note that the above examples are not intended to be limiting. Additional embodiments of the apparatus and devices that can include many of the features described above are also contemplated. Other devices, apparatus, features and advantages of the disclosure will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional devices, apparatus, features and advantages be included within this description, be within the scope of the present invention.

Conditional language such as "can," "may," "might," or "may" is generally intended to convey that certain embodiments may, but need not, include certain features and/or elements unless specifically stated otherwise or understood otherwise within the context of use. Thus, such conditional language is not generally intended to imply that one or more embodiments are in any way required to include the described features and/or elements.

Claims

1. A seal, characterized in that the seal (100) comprises: a protective seal (1) and a functional seal (2), the protective seal (1) and the functional seal (2) being connected together; wherein the content of the first and second substances,

the protective seal (1) comprises: a protective seal body (10) extending in a horizontal direction, a first seal lip (11) extending downward from the protective seal body (10), and at least two connecting ribs (12) protruding from the protective seal body (10) toward the functional seal (2);

the functional seal (2) comprises: a functional seal body (20) extending in the horizontal direction, an abutting portion (21) extending downward from the functional seal body (20), and an attachment portion (22) extending upward from the functional seal body (20);

the at least two connecting ribs (12) of the protective seal (1) are connected with the attachment portion (22) of the functional seal, so that the protective seal (1) and the functional seal (2) are connected together.

2. The seal of claim 1, comprising: the at least two connecting ribs (12) are three or four connecting ribs.

3. Seal according to claim 2, characterized in that the abutment (21) of the functional seal (2) extends downwards and is inclined towards the protective seal (1), the abutment (21) making a first angle of inclination (α 1) with the horizontal in the range of 30-60 °.

4. A seal according to claim 3, wherein the first angle of inclination is in the range 40-50 °.

5. Seal according to any of claims 1-4, characterized in that the outer circumference of the functional seal body (20) has a fir tree-like profile comprising a plurality of protrusions.

6. Seal according to any of claims 1-4, characterized in that the centre line of the functional seal body (20) is X; the centerline of the protective seal body (10) is X1, X1 being located above X.

7. Seal according to any of claims 1-4, characterized in that the protective seal (1) is formed integrally with the functional seal (2) in rubber.

8. Rolling bearing, characterized in that it comprises a seal (100) according to any one of claims 1 to 7 and a slewing bearing on which the seal (100) is mounted, the slewing bearing comprising an inner ring (3) and an outer ring (4), the inner ring (3) and the outer ring (4) being mutually rotatable about a rotation axis in the vertical direction, the seal (100) being arranged between the inner ring (3) and the outer ring (4).

9. Rolling bearing according to claim 8, wherein the functional seal body (20) of the functional seal (2) cooperates with a groove of the outer face of one of the inner ring (3) and the outer ring (4), the abutment (21) of the functional seal (2) and the first sealing lip (11) of the shield seal (1) being pressed against the upper face of the other of the inner ring (3) and the outer ring (4).

10. Rolling bearing according to claim 8, wherein the slewing bearing is a pitch bearing or a yaw bearing to be painted.