CN218863105U

CN218863105U - Sealing element and rolling bearing

Info

Publication number: CN218863105U
Application number: CN202221144608.8U
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: 2022-05-12
Filing date: 2022-05-12
Publication date: 2023-04-14
Anticipated expiration: 2032-05-12

Abstract

The utility model relates to a sealing member and antifriction bearing. The sealing member includes: a seal main body (20) extending in a horizontal direction, an attachment portion (21) extending downward from the seal main body (20), at least four seal lips extending from the seal main body (20): an upper sealing lip (22), a second sealing lip (23), a third sealing lip (24) and a lower sealing lip (25, 25', 26'); the upper seal lip (22) extends upward from the seal main body (20); the second sealing lip (23) is positioned at the right end of the sealing member main body (20) and extends upwards; the third sealing lip (24) is positioned at the right end of the sealing member main body (20) and extends downwards; the lower seal lip (25, 25', 26') extends downward from the seal body (20).

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

The sealing element commonly used for the slewing bearing comprises a single-lip sealing structure or a double-lip sealing structure, and the grease can leak from the sealing part under the condition that the bearing raceway is filled with the grease by adopting the conventional single-lip sealing structure. By adopting the double-lip sealing structure, after the bearing is stressed and deformed, the sealing compression amount is reduced, and grease in the bearing is leaked from the sealing position. The existing sealing elements have unreliable raceway grease sealing, and leakage of grease can cause pollution to the cabin environment and even cause machine failure. The grease leakage problem of the sealing element in the prior art cannot meet the requirements of some special industries: such as wind power, mooring systems, etc.

The object of the present invention is therefore to solve the above mentioned technical problems of the prior art seals.

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 effectively seal up to the supporting in the fan, solve the technical problem that the sealed department grease was revealed.

According to an aspect of the present invention, there is provided a seal for sealing a bearing gap between an outer ring and an inner ring of a slewing bearing, the outer ring and the inner ring being rotatable relative to each other about a vertical axis of rotation, the seal comprising: a seal body extending in a horizontal direction, an attachment portion extending downward from the seal body, at least four seal lips extending from the seal body, the at least four seal lips comprising: the upper sealing lip, the second sealing lip, the third sealing lip and the lower sealing lip; the upper seal lip extends upward from the seal body; the second sealing lip is positioned at the right end of the sealing element main body and extends upwards; the third sealing lip is positioned at the right end of the sealing member main body and extends downwards; the lower seal lip extends downward from the seal body.

Preferably, the upper seal lip extends upward from the seal body, is inclined toward the inner ring, and has a first inclination angle with respect to a horizontal direction.

Preferably, the lower seal lip extends downward from the seal body and is inclined toward the inner ring at a second inclination angle from the horizontal direction.

Preferably, the first inclination angle is 45 ° and/or the second inclination angle is 45 °.

Preferably, the lower seal lip extends downward from the seal body and is inclined toward the outer ring at a third inclination angle from the horizontal direction.

Preferably, the lower sealing lip is shorter in length than the third sealing lip.

Preferably, the lower seal lip includes a first lower seal lip extending downward from the seal body and inclined toward the inner ring at a second inclination angle from the horizontal direction; the second lower seal lip extends downward from the seal body and is inclined toward the outer ring at a third inclination angle with respect to the horizontal direction.

Preferably, the second inclination angle is 45 ° and/or the third inclination angle is less than 90 °.

Preferably, the attachment portion includes a finger portion and a positioning portion.

Preferably, the positioning part is an outwardly protruding bump or an outwardly protruding inclined part.

Preferably, the positioning portion is an inclined portion protruding outward, and the inclined portion further includes a relief groove above the inclined portion.

According to another aspect of the present invention, there is provided a rolling bearing comprising the aforementioned seal and a slewing bearing mounting the seal, the slewing bearing comprising an outer ring and an inner ring, the seal being disposed between the outer ring and the inner ring; the attachment part of the sealing element is matched and positioned with the groove of the outer ring, the second sealing lip and the third sealing lip of the sealing element are matched and sealed with the groove of the inner ring, the upper sealing lip of the sealing element is abutted against the upper outer wall surface of the inner ring, and the upper outer wall surface is positioned above the groove of the inner ring.

Preferably, the lower seal lip extends downward from the seal body and is inclined toward the inner ring at a second inclination angle from the horizontal direction, the lower seal lip abuts against a lower outer wall surface of the inner ring, and the lower outer wall surface is located below the groove of the inner ring;

or the lower sealing lip extends downwards from the sealing element main body and inclines towards the outer ring, a third inclination angle is formed between the lower sealing lip and the horizontal direction, and the lower sealing lip is abutted against the bottom side surface of the groove of the inner ring;

or the lower sealing lip comprises a first lower sealing lip and a second lower sealing lip, the first lower sealing lip is abutted against the lower outer wall surface of the inner ring, the lower outer wall surface is located below the groove of the inner ring, and the second lower sealing lip is abutted against the bottom side surface of the groove of the inner ring.

Preferably, the third sealing lip presses against the bottom side of the groove; the second sealing lip presses against the top side of the groove, or the second sealing lip presses against a corner where the top and inner sides of the groove meet.

Preferably, the slewing bearing is a slewing bearing for use in a wind power generation or mooring system.

The utility model discloses a sealing member passes through the design of the assembly magnitude of interference of location portion to and many lips seal structure design isotructure, effectively solved the problem that the sealed department grease was revealed, improved antifriction bearing's life.

Drawings

FIG. 1 shows one embodiment of the seal of the present invention and one of the schematic structural views of the seal installed between an inner ring and an outer ring;

FIG. 2 shows another embodiment of the seal of the present invention and one of the schematic structural views of the seal installed between the inner and outer rings;

FIG. 3 shows a further embodiment of the novel seal and one of the schematic structural views of the seal installed between an inner ring and an outer ring;

fig. 4 shows a further embodiment of the seal of the present invention and one of the structural schematics of the seal installed between the inner ring and the 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 antifriction bearing includes sealing member 1 and slewing bearing. The seal 1 is used for sealing a bearing gap of the slewing bearing, the slewing bearing comprises an outer ring 3 and an inner ring 4, and the seal 1 is arranged between the outer ring 3 and the inner ring 4. As shown in fig. 1, the outer ring 3 and the inner ring 4 are rotatable relative to each other about a rotation axis in a vertical direction, the X direction shown is a horizontal direction perpendicular to the rotation axis, a direction away from the slewing bearing is referred to as an upward direction, and a direction toward the slewing bearing is referred to as a downward direction.

The seal 1 comprises: a seal body 20, the seal body 20 extending in a horizontal direction; an attachment portion 21 extending downward from the seal body 20, at least four seal lips extending from the seal body 20. The method comprises the following steps: an upper seal lip 22, a second seal lip 23, a third seal lip 24, and a lower seal lip 25. The attaching portion 21 includes a finger portion 211 provided on one side and a positioning portion provided on the other side. The upper lip 22 extends upwards from the seal body 20 and is inclined towards the inner ring 4 at a first inclination angle α 1, preferably 45 °, to the horizontal; a second seal lip 23 is provided at the right end of the seal body 20 extending upward substantially perpendicularly to the seal body 20 and being tiltable toward the inner ring 4, and a third seal lip 24 is provided at the right end of the seal body 20 extending downward substantially perpendicularly to the seal body 20 and being tiltable toward the outer ring 3; the lower seal lip 25 extends downward from the seal body 20 and forms an inclination angle with the horizontal direction.

The inner ring 4 comprises an outer wall surface facing the outer ring 3, the outer wall surface is provided with a groove 40, and the outer wall surface comprises an upper outer wall surface 401 positioned above the groove 40 and a lower outer wall surface 405 positioned below the groove 40; the groove 40 has a top side 402, a bottom side 404, and an inner side 403. The outer ring 3 comprises an upwardly opening groove 30.

When the seal 1 is installed between the inner ring 4 and the outer ring 3 of the slewing bearing, as shown in fig. 1 to 3, the attachment portion 21 of the seal 1 is oriented downward to be positioned in cooperation with the groove 30 of the outer ring 3, and the second seal lip 23 and the third seal lip 24 of the seal body 20 are sealed in cooperation with the groove 40 of the inner ring 3. The upper seal lip 22 of the seal 3 abuts against the upper outer wall surface 401 of the inner ring 4, and the second seal lip 23 and the third seal lip 24 extend into the groove 40 and abut against the inner wall of the groove 40. The fingers 211 of the attachment portion 21 are preferably inclined obliquely upwards, the fingers 211 forming a barb connection with the first side wall 311 of the recess 30 when the attachment portion 21 is inserted into the recess 30, serving to secure the seal 1. The material of the seal may be an elastic material such as rubber, and is preferably extrusion molded from a material such as Nitrile Butadiene Rubber (NBR), hydrogenated Nitrile Butadiene Rubber (HNBR), or Fluororubber (FKM).

Preferably, as shown in fig. 1 and 3, the lower seal lip 25 extends downward from the seal body 20 and is inclined toward the inner ring 4 at a second inclination angle α 2 with respect to the horizontal, preferably the second inclination angle is in the range of 30 to 60 °, and more preferably the angle is 45 °. In this embodiment, when the seal 1 is installed between the inner ring 4 and the outer ring 3, the lower seal lip 25 is pressed against the lower outer wall surface 405 of the inner ring 4, as shown in fig. 1 and 3.

Preferably, the lower seal lip may also be formed by a lower seal lip 25 'structure as shown in fig. 2, the lower seal lip 25' extending downward from the seal body 20 and inclined toward the outer ring 3 at a third inclination angle α 3 from the horizontal direction, preferably, the third inclination angle is less than 90 °. In this embodiment, the lower sealing lip 25' presses against the bottom side 404 of the groove 40 when the seal 1 is installed between the inner ring 4 and the outer ring 3, as shown in fig. 2. Preferably, the lower sealing lip 25' protrudes from the sealing member main body 20 to a shorter length than the second sealing lip 24, so that a proper amount of grease can enter the second sealing lip 24 to perform a lubricating sealing function, and a technical effect of double sealing is achieved.

When the seal 1 is installed between the inner ring 4 and the outer ring 3 of the support, the third sealing lip 24 presses against the bottom flank 404, the second sealing lip 23 presses against the top flank 402 of the groove 40, and optionally the second sealing lip 23 may also press against a corner where the top flank 402 and the inner flank 403 meet.

The utility model discloses an upper seal lip 22 of sealing member can prevent dust, prevent that the pollutant from getting into second seal lip 23 and third seal lip 24, and lower seal lip 25 or lower seal lip 25' play certain sealed effect to the interior grease of bearing, but can let appropriate amount grease get into seal groove 40 to play the effect of lubricated sealing, rust-resistant recess position.

Preferably, the groove 30 of the outer ring 3 further includes a positioning fitting portion corresponding to the positioning portion of the attachment portion 21, further functioning to fasten the seal 1. The positioning part of the attaching part 21 may be an outwardly protruding bump 212, as shown in fig. 1 and 2, and correspondingly, the second sidewall 312 of the groove 30 has a concave part 301 matching the shape of the bump 212. The positioning portion of the attaching portion 21 may also be an inclined portion 213 protruding outward, as shown in fig. 3, and accordingly, the second sidewall 312 of the groove 30 has an inclined concave portion 302 matching the shape of the inclined portion 213. Further preferably, as shown in fig. 3, the positioning portion of the attachment portion 21 further includes a relief groove 214 located above the inclined portion 213, and is more easily installed when the positioning portion is inserted into the groove 30 of the outer ring 3.

Preferably, the sealing element 1 of the present invention may comprise five sealing lips, as shown in fig. 4, respectively: an upper seal lip 22, a second seal lip 23, a third seal lip 24, a first lower seal lip 26 and a second lower seal lip 26', the position of the first lower seal lip 26 is similar to that of the lower seal lip 25 in the embodiment of fig. 1 and 3, the first lower seal lip 26 extends downwards from the seal main body 20 and inclines towards the inner ring 4, and the first lower seal lip 26 and the horizontal direction form a second inclination angle alpha 2; the second inclination angle is preferably in the range of 30-60 deg., more preferably 45 deg.. The second lower lip 26' is similar to the lower lip 25' of the embodiment of fig. 2, the second lower lip 26' extending downwards from the seal body 20 and being inclined towards the outer ring 3 with a third inclination angle α 3 to the horizontal, preferably smaller than 90 °. In this embodiment, except that the lower sealing lip includes the first lower sealing lip 26 and the second lower sealing lip 26', other components and structures of the sealing member 1 may be the same as those of the other embodiments and combined with each other to form different technical solutions, and detailed description thereof is omitted. In the present embodiment, the first lower seal lip 26 and the second lower seal lip 26' perform a double sealing function with respect to grease in the bearing from the lower outer wall surface 405 of the inner ring 4 and the bottom side surface 404 of the groove 40, respectively, and also allow an appropriate amount of grease to enter the seal groove 40 to perform a function of lubricating the seal and rust-proof groove portion.

The utility model discloses a sealing member passes through the design of the assembly magnitude of interference of location portion to and special structure such as many lips seal structure design, problem that can effectual solution seal department grease reveal. Compare prior art's single lip, two lip seal structure, the utility model discloses a sealing member can more effectually prevent that the grease from revealing, blocks the performance influence that pollutants such as dust led to the fact to the seal lip, 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 (1) for sealing a bearing gap between an outer ring (3) and an inner ring (4) of a slewing bearing, which outer ring (3) and inner ring (4) are mutually rotatable about a rotation axis in the vertical direction, characterized in that the seal (1) comprises: a seal main body (20) extending in a horizontal direction, an attachment portion (21) extending downward from the seal main body (20), at least four seal lips extending from the seal main body (20); the at least four sealing lips comprise: an upper sealing lip (22), a second sealing lip (23), a third sealing lip (24) and a lower sealing lip (25, 25'); the upper seal lip (22) extends upward from the seal main body (20); the second sealing lip (23) is positioned at the right end of the sealing member main body (20) and extends upwards; the third sealing lip (24) is positioned at the right end of the sealing member main body (20) and extends downwards; the lower seal lip (25, 25', 26') extends downward from the seal body (20).

2. The seal according to claim 1, characterized in that the upper sealing lip (22) extends upwards from the seal body (20) and is inclined towards the inner ring (4) with a first angle of inclination (α 1) to the horizontal.

3. Seal according to claim 2, characterized in that said lower lip (25) extends downwards from said seal body (20) and is inclined towards said inner ring (4) at a second angle of inclination (α 2) with respect to the horizontal.

4. A seal according to claim 3, wherein the first angle of inclination is 45 ° and/or the second angle of inclination is 45 °.

5. Seal according to claim 2, characterized in that said lower sealing lip (25') extends downwards from said seal body (20) and is inclined towards said outer ring (3) at a third inclination angle (α 3) to the horizontal.

6. A seal according to claim 5, characterized in that the lower sealing lip (25') is shorter in length than the third sealing lip (24).

7. A seal according to claim 2, characterized in that said lower sealing lips comprise a first lower sealing lip (26) and a second lower sealing lip (26'), said first lower sealing lip (26) extending downwards from said seal body (20) and being inclined towards said inner ring (4) at a second inclination angle (α 2) to the horizontal; the second lower seal lip (26') extends downward from the seal body (20) and is inclined toward the outer ring (3) at a third inclination angle (α 3) from the horizontal direction.

8. A seal according to claim 7, characterized in that the second angle of inclination (α 2) is 45 ° and/or the third angle of inclination (α 3) is less than 90 °.

9. Seal according to any of claims 1-8, characterized in that the attachment portion (21) comprises a finger portion (211) and a positioning portion.

10. The seal of claim 9, wherein the locating portion is an outwardly projecting ridge (212) or an outwardly projecting ramp (213).

11. The seal of claim 10, wherein the positioning portion is an outwardly projecting inclined portion (213), and further comprising an undercut (214) above the inclined portion (213).

12. Rolling bearing comprising a seal (1) according to any one of claims 1 to 11 and a slewing bearing on which the seal (1) is mounted, characterized in that the slewing bearing comprises an outer ring (3) and an inner ring (4), the seal (1) being arranged between the outer ring (3) and the inner ring (4); the attachment portion (21) of the sealing element (1) is matched and positioned with the groove (30) of the outer ring (3), the second sealing lip (23) and the third sealing lip (24) of the sealing element (1) are matched and sealed with the groove (40) of the inner ring (4), the upper sealing lip (22) of the sealing element (1) is abutted against the upper outer wall surface (401) of the inner ring (4), and the upper outer wall surface (401) is located above the groove (40) of the inner ring (4).

13. Rolling bearing according to claim 12, wherein the lower sealing lip (25) extends downwards from the seal body (20) and is inclined towards the inner ring (4) with a second inclination angle (α 2) to the horizontal, the lower sealing lip (25) abutting against a lower outer wall surface (405) of the inner ring (4), the lower outer wall surface (405) being located below the groove (40) of the inner ring (4);

or the lower sealing lip (25 ') extends downwards from the sealing body (20) and inclines towards the outer ring (3) and forms a third inclination angle (alpha 3) with the horizontal direction, and the lower sealing lip (25') abuts against the bottom side surface (404) of the groove (40) of the inner ring (4);

or the lower sealing lip comprises a first lower sealing lip (26) and a second lower sealing lip (26 '), the first lower sealing lip (26) abuts against a lower outer wall surface (405) of the inner ring (4), the lower outer wall surface (405) is located below the groove (40) of the inner ring (4), and the second lower sealing lip (26') abuts against a bottom side surface (404) of the groove (40) of the inner ring (4).

14. Rolling bearing according to claim 13, characterized in that the third sealing lip (24) is pressed against a bottom side (404) of the groove (40);

the second sealing lip (23) is pressed against the top side face (402) of the groove (40), or the second sealing lip (23) is pressed against a corner portion where the top side face (402) and the inner side face (403) of the groove (40) meet.

15. Rolling bearing according to any of claims 12 to 14, wherein the slewing bearing is a slewing bearing for use in a wind power generation or mooring system.