Sealing assembly

Patent metadata

Field	Value
Publication number	US-9410555-B2
Application number	US-201414450732-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Aug 5, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A sealing assembly includes a seal support having a support ring made from an elastomeric material, at least one seal element having a ring made from a polymer material, and an abutment ring against which a radial portion of the seal element axially abuts. The seal element is connected in a materially-bonded manner to the support ring along a first radially outer portion of the seal element, and the seal element axially abuts on the abutment ring along a second radially inner portion of the seal element. The seal element and the abutment ring are free of any connection along the second radially inner portion of the seal element.

First claim

We claim:

1. A sealing assembly comprising:
a seal support comprising a support ring and an abutment ring, the support ring made from an elastomeric material, the seal support having a radially extending seal support surface configured to contact a seal element and support a portion of the seal element in a configuration perpendicular to a shaft, the radially extending seal support surface having a radially outer portion and a radially inner portion that together form the radially extending seal support surface such that the radially outer portion and the radially inner portion form a common radially extending surface,
the seal element comprising a ring made from a polymer material, the seal element being configured to seal against the shaft, and
the abutment ring partially embedded within the support ring and partially protruding therefrom, the abutment ring and support ring being configured to together form the radially extending seal support surface, the radially outer portion of the radially extending seal support surface is formed by the support ring and the radially inner portion of the radially extending seal support surface is formed by the abutment ring, the abutment ring being configured to not contact the shaft during operation,
wherein the seal element is connected in a materially-bonded manner to the support ring along the radially outer portion of the radially extending seal support surface, the seal element being configured to axially abut the abutment ring along the radially inner portion of the radially extending seal support surface, the seal element and the abutment ring are free of any connection along the radially inner portion of the radially extending seal support surface, the abutment ring and the seal element are configured to both bend in a same direction when extending radially inwardly from the support ring such that the seal element is biased to be positioned along and against the abutment ring prior to engagement with the shaft.

2. The sealing assembly according to claim 1 , wherein a portion of the seal element abuts the support ring and is connected to the support ring in a materially-bonded manner.

3. The seal assembly according to claim 2 , wherein the radially outer portion and the radially inner portion of the radially extending seal support surface of the seal support are flush.

4. The sealing assembly according to claim 1 , wherein the abutment ring is S-shaped in radial section.

5. The sealing assembly according to claim 4 , wherein the abutment ring is partially covered by the material of the support ring.

6. The sealing assembly according to claim 1 , wherein the seal element includes a profile configured to pump fluid in an axial direction.

7. The sealing assembly according to claim 1 , wherein the abutment ring is formed of metal.

8. The sealing assembly according to claim 1 , wherein the seal support includes a reinforcing ring which is at least partially surrounded by the elastomer material of the support ring.

9. The sealing assembly according to claim 8 , wherein a radially outer end of the seal element abuts on a cylindrical inner side of the reinforcing ring.

10. The seal assembly according to claim 1 , wherein the abutment ring includes a plurality of centering tabs in a radially-outer region.

11. A compressor element comprising the sealing assembly according to claim 1 .

12. The sealing assembly according to claim 1 , wherein the polymer material comprises polytetrafluoroethylene (PTFE).

13. The sealing assembly according to claim 1 , wherein,
the abutment ring is S-shaped in radial section,
the abutment ring is partially covered by the material of the support ring,
the seal element includes a profile for pumping fluid,
the abutment ring is formed of metal,
the seal support includes a reinforcing ring which is at least partially surrounded by the elastomer material of the support ring,
a radially outer end of the seal element abuts on a cylindrical inner side of the reinforcing ring, and
the abutment ring includes a plurality of centering tabs in a radially-outer region.

14. The seal assembly of claim 1 , wherein the seal element removably abuts the abutment ring.

15. The sealing assembly according to claim 1 , wherein the seal element is not directly attached to the abutment ring.

16. The sealing assembly according to claim 1 , wherein the seal element is not materially bonded to the abutment ring.

17. The sealing assembly according to claim 1 , wherein the seal element is non-destructively axially separable from the abutment ring.

18. The seal assembly of claim 1 , wherein the abutment ring is formed of metal.

Assignees

• Benedix Helmut
• Kurth Juergen
• Seewald Willy
• Worsley Roland
• Skf Ab

Inventors

• Benedix Helmut
• Kurth Juergen
• Seewald Willy
• Worsley Roland

Classifications

• F04D29/102 Primary

  especially adapted for elastic fluid pumps · CPC title

• F04D19/00

  Axial-flow pumps (F04D21/00 takes precedence; {pump comprising axial flow and radial flow stages F04D17/025}) · CPC title

• F04D29/122

  especially adapted for elastic fluid pumps · CPC title

• F16J15/181

  for plastic packings · CPC title

• F16J15/3228

  formed by deforming a flat ring · CPC title