Sealing device, sealing assembly and apparatus having a rotating shaft with the sealing assembly

Patent metadata

Field	Value
Publication number	US-11549587-B2
Application number	US-202017088416-A
Country	US
Kind code	B2
Filing date	Nov 3, 2020
Priority date	Oct 23, 2020
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A sealing device, sealing assembly and an apparatus having a rotation shaft that uses the sealing assembly. The sealing assembly includes a rotating shaft seal and a sealing device. The rotating shaft seal has a ring shaped body with the rotating shaft passing through it and a sealing portion forming a dynamic sealing cooperation with the rotating shaft. The sealing device includes a ring shaped body with the rotating shaft passing through it, and includes first and second ring shaped portions spaced apart from each other in an axial direction. The first ring shaped portion defines a static sealing surface forming a static sealing cooperation with the rotating shaft, and the second ring shaped portion defines a dynamic sealing surface forming a dynamic sealing cooperation with a portion of the rotating shaft seal adjacent to the sealing portion of the rotating shaft seal.

First claim

What is claimed is:

1. A sealing device for use with a rotating shaft seal to seal a rotating shaft, wherein the rotating shaft seal includes a ring shaped body with the rotating shaft passing through it, and includes a sealing portion configured to form a dynamic sealing cooperation with the rotating shaft, the sealing device comprising:
a ring shaped body, configured to accommodate the rotating shaft passing through it, the ring shaped body including a first ring shaped portion and a second ring shaped portion spaced apart from each other in an axial direction of a rotation axis of the rotating shaft,
wherein the first ring shaped portion defines a static sealing surface configured to form a static sealing cooperation with the rotating shaft, and
wherein the second ring shaped portion includes a flexible material that defines a dynamic sealing surface configured to form a dynamic sealing cooperation with a portion of the body of the rotating shaft seal that is adjacent to the sealing portion of the rotating shaft seal.

2. The sealing device of claim 1 , wherein the ring shaped body further comprise:
a transition portion that connects the first ring shaped portion and the second ring shaped portion, where the transition portion defines an inner surface that is concave in a cross-section that passes through the rotation axis of the rotating shaft.

3. The sealing device of claim 1 , wherein the second ring shaped portion further includes a connecting surface disposed between the dynamic sealing surface and the concave surface.

4. The sealing device of claim 3 , wherein the connecting surface is configured to form a gap between the connecting surface and the rotating shaft.

5. The sealing device of claim 1 , wherein the ring shaped body further includes:
a flange structure extending from an outer end of the dynamic sealing surface, wherein the flange structure extends parallel to the rotation axis towards the rotating shaft seal when the dynamic sealing surface and the body of the rotating shaft seal form a dynamic sealing cooperation.

6. A sealing assembly for use with a rotating shaft, the sealing assembly comprising:
a rotating shaft seal, having a ring shaped body configured to accommodate the rotating shaft passing through it, and including a sealing portion disposed in contact with the rotating shaft and configured to form a dynamic sealing cooperation with the rotating shaft;
a sealing device, which includes:
a ring shaped body, configured to accommodate the rotating shaft passing through it, the ring shaped body including a first ring shaped portion and a second ring shaped portion spaced apart from each other in an axial direction of a rotation axis of the rotating shaft,
wherein the first ring shaped portion defines a static sealing surface configured to form a static sealing cooperation with the rotating shaft, and
wherein the second ring shaped portion defines a dynamic sealing surface configured to form a dynamic sealing cooperation with a second portion of the body of the rotating shaft seal that is adjacent to the sealing portion of the rotating shaft seal.

7. The sealing assembly of claim 6 , wherein the ring shaped body of the sealing device further comprise:
a transition portion that connects the first ring shaped portion and the second ring shaped portion, where the transition portion defines an inner surface that is concave in a cross-section that passes through the rotation axis of the rotating shaft.

8. The sealing assembly of claim 7 , wherein the second ring shaped portion further includes a connecting surface disposed between the dynamic sealing surface and the concave surface.

9. The sealing assembly of claim 8 , wherein the connecting surface is configured to form a gap between the connecting surface and the rotating shaft.

10. The sealing assembly of claim 6 , wherein the ring shaped body of the sealing device further includes:
a flange structure extending from an outer end of the dynamic sealing surface, wherein the flange structure extends parallel to the rotation axis towards the rotating shaft seal when the dynamic sealing surface and the body of the rotating shaft seal form a dynamic sealing cooperation.

11. The sealing assembly of claim 6 , wherein the second ring shaped portion includes a flexible material that defines the dynamic sealing surface.

12. An apparatus including a rotating shaft and the sealing assembly of claim 6 .

13. An apparatus comprising:
a rotating shaft;
a rotating shaft seal, having a ring shaped body configured to accommodate the rotating shaft passing through it, and including a sealing portion disposed in contact with the rotating shaft and configured to form a dynamic sealing cooperation with the rotating shaft;
a sealing device, which includes:
a ring shaped body, configured to accommodate the rotating shaft passing through it,
wherein the ring shaped body defines a static sealing surface configured to form a static sealing cooperation with the rotating shaft and defines a dynamic sealing surface configured to form a dynamic sealing cooperation with a second portion of the body of the rotating shaft seal that is adjacent to the sealing portion of the rotating shaft seal.

14. The apparatus of claim 13 , wherein the ring shaped body of the sealing device includes a flexible material that defines the dynamic sealing surface.

15. The apparatus of claim 13 , wherein the ring shaped body of the sealing device further defines a connecting surface which connects the static sealing surface and the dynamic sealing surface, and wherein the connecting surface has a curved shape in a cross-section that passes through the rotation axis of the rotating shaft.

16. The sealing assembly of claim 11 , wherein the second portion of the body of the rotating shaft seal is formed of a flexible material, and wherein the dynamic sealing cooperation is formed between the flexible material of the second portion of the body of the rotating shaft seal and the flexible material of the second ring shaped portion of the sealing device.

17. The apparatus of claim 14 , wherein the second portion of the body of the rotating shaft seal is formed of a flexible material, and wherein the dynamic sealing cooperation is formed between the flexible material of the second portion of the body of the rotating shaft seal and the flexible material of the ring shaped body of the sealing device.

Assignees

• Li Chengli

Inventors

• Wang Shengyan

Classifications

• F16J15/4476

  with radial path · CPC title

• F16J15/32 Primary

  with elastic sealings, e.g. O-rings · CPC title

• F16J15/34

  with slip-ring pressed against a more or less radial face on one member · CPC title

• F16J15/3264 Primary

  the elements being separable from each other · CPC title

• F16J15/3456

  without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip · CPC title