Seal for large roller bearing

Patent metadata

Field	Value
Publication number	US-11933360-B2
Application number	US-202117448029-A
Country	US
Kind code	B2
Filing date	Sep 17, 2021
Priority date	Mar 21, 2019
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

The invention relates to a seal for a large roller bearing for sealing a joint between two adjacent ring segments or ring parts of the roller bearing, wherein at least two mutually spaced apart sealing limbs of a rubber elastic and/or yielding sealing material for sealing insertion into grooves that are formed at both sides of the joint in ring segments or ring parts that are adjacent to one another and a connection section connecting the sealing limbs and composed of a rubber elastic and/or yielding sealing material to span said joint.

First claim

We claim:

1. A seal for a large roller bearing for sealing a joint between two adjacent ring segments or ring parts of the roller bearing, wherein the seal comprises:
at least two mutually spaced apart sealing limbs comprising a rubber elastic and/or yielding sealing material for sealing insertion into sealing grooves formed at both sides of the joint in ring segments or ring parts adjacent to one another;
a connection section connecting the at least two mutually spaced apart sealing limbs and comprising a rubber elastic and/or yielding sealing material that spans the joint; and
a desired stretching section in a region of the connection section,
wherein the desired stretching section has a greater elasticity and/or a smaller stretching stiffness than adjacent sealing sections and/or the at least two mutually spaced apart sealing limbs,
wherein the desired stretching section has a stretching fold contoured in a channel shape or in a bead shape, and
wherein the stretching fold is configured to be drawn flat by drawing the at least two mutually spaced apart sealing limbs apart.

2. The seal of claim 1 , wherein the at least two mutually spaced apart sealing limbs and the connection section form an elongate section member having a U-shaped cross-section, and wherein the connection section is interposed between the at least two mutually spaced apart sealing limbs.

3. The seal of claim 2 , wherein the desired stretching section has a reduced wall thickness that is reduced in comparison with the wall thickness of adjacent seal sections and/or in comparison with the wall thickness of the at least two mutually spaced apart sealing limbs.

4. The seal of claim 1 , wherein the at least two mutually spaced apart sealing limbs and the connection section are formed integrally as a single piece with material homogeneity and/or of the same elastic sealing material, and wherein the same elastic sealing material comprises a plastic material and/or rubber material.

5. The seal of claim 1 , wherein the connection section is configured to permit and compensate deformations and relative movements of the two adjacent ring segments relative to one another so that the joint remains sealed on widening and/or relative movements with respect to one another.

6. The seal of claim 1 , wherein the at least two mutually spaced apart sealing limbs have laterally projecting sealing lips that lie at the at least two mutually spaced apart sealing limbs and at groove walls adjacent thereto on an insertion of the at least two mutually spaced apart sealing limbs into the sealing grooves.

7. The seal of claim 1 , wherein the at least two mutually spaced apart sealing limbs have a height less than 75% of the width B of the connection section.

8. The seal of claim 1 , wherein the at least two mutually spaced apart sealing limbs have a height less than 50% of the width B of the connection section.

9. The seal of claim 1 , wherein the desired stretching section has a reduced wall thickness that is reduced in comparison with the wall thickness of adjacent seal sections and/or in comparison with the wall thickness of the at least two mutually spaced apart sealing limbs.

10. A seal for a large roller bearing for sealing a joint between two adjacent ring segments or ring parts of the roller bearing, wherein the seal comprises:
at least two mutually spaced apart sealing limbs comprising a rubber elastic for sealing insertion into sealing grooves formed at both sides of the joint in ring segments or ring parts adjacent to one another;
a connection section connecting the at least two mutually spaced apart sealing limbs and comprising a rubber elastic that spans the joint; and
a desired stretching section in a region of the connection section, wherein the desired stretching section has greater elasticity and smaller stretching stiffness than both adjacent portions of the connection section and the at least two mutually spaced apart sealing limbs, and
the desired stretching section has a stretching fold contoured in a channel shape or in a bead shape, and wherein the stretching fold is configured to be drawn flat by drawing the at least two mutually spaced apart sealing limbs apart.

11. The seal of claim 10 , wherein the desired stretching section has a reduced wall thickness that is reduced in comparison with the wall thickness of adjacent seal sections and/or in comparison with the wall thickness of the at least two mutually spaced apart sealing limbs.

12. The seal of claim 10 , wherein the desired stretching section has a reduced wall thickness that is reduced in comparison with the wall thickness of adjacent seal sections and/or in comparison with the wall thickness of the at least two mutually spaced apart sealing limbs.

13. A roller bearing in the form of an open centered large roller bearing, comprising:
two roller races rotatable with respect to one another, wherein at least one of the roller races comprises ring segments or ring parts adjacent to one another at a joint; and
a seal for sealing the joint, wherein the seal comprises:
at least two mutually spaced apart sealing limbs comprising a rubber elastic and/or yielding sealing material for sealing insertion into a respective sealing groove at both sides of the joint in ring segments or ring parts adjacent to one another, wherein the respective sealing groove at both sides of the joint is open toward the outer side; and
a connection section connecting the at least two mutually spaced apart sealing limbs and comprising a rubber elastic and/or yielding sealing material that spans the joint,
wherein the at least two mutually spaced apart sealing limbs of the seal are sealingly seated in the respective sealing groove at both sides of the joint and with the connection section of the seal spanning the joint.

14. The roller bearing of claim 13 , wherein the joint extends in a plane containing the axis of rotation of the roller bearing, and wherein the seal is seated on a peripheral surface of one of the roller races.

15. The roller bearing of claim 14 , wherein the at least two mutually spaced apart sealing limbs are configured to be inserted into the respective sealing groove at both sides of the joint while elastically deformed and be clampingly held in the respective sealing groove at both sides of the joint.

16. The roller bearing of claim 13 , wherein the joint extends in a plane perpendicular to the axis of rotation of the roller bearing, and wherein the seal is seated on a peripheral surface of one of the roller races.

17. The roller bearing of claim 16 , wherein the at least two mutually spaced apart sealing limbs are configured to be inserted into the respective sealing groove at both sides of the joint while elastically deformed and be clampingly held in the respective sealing groove at both sides of the joint.

18. The roller bearing of claim 13 , wherein the at least two mutually spaced apart sealing limbs are configured to be inserted into the respective sealing groove at both sides of the joint while elastically deformed and be clampingly held in the respective sealing groove at both sides of the joint.

Assignees

• Liebherr Components Biberach Gmbh

Inventors

• Altmayer Thomas
• Palmer Andreas

Classifications

• F16C33/768 Primary

  between relatively stationary parts, i.e. static seals · CPC title

• F16C19/08

  with two or more rows of balls · CPC title

• F16C33/60 Primary

  divided {or split, e.g. comprising two juxtaposed rings} · CPC title

• F16C2300/14

  Large applications, e.g. bearings having an inner diameter exceeding 500 mm · CPC title

• F16C19/505

  with the diameter of the rolling elements of one row differing from the diameter of those of another row · CPC title