Sliding seal

Patent metadata

Field	Value
Publication number	US-9512735-B2
Application number	US-201514830795-A
Country	US
Kind code	B2
Filing date	Aug 20, 2015
Priority date	Oct 24, 2014
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

The present disclosure relates generally to a sliding seal between two components. At least one of the two components includes a ramped surface on which the sliding seal slides during relative movement between the two components.

First claim

What is claimed:

1. A seal for sealing a space defined by first and second circumferential components, the seal comprising:
a first seal section including a first base defining a ramped surface and a first leg extending from the first base, wherein an angle between the first base and the first leg comprises greater than 90 degrees; and
a second seal section in sliding contact with the ramped surface;
wherein the first seal section is configured to sealingly engage with the first circumferential component along a single first circumferential line of contact and to sealingly engage with the second circumferential component along a single second circumferential line of contact; and
wherein the second seal section is configured to sealingly engage with the second circumferential component along a single third circumferential line of contact; and
wherein the first and second seal sections are configured to move relative to one another.

2. The seal of claim 1 , wherein the second seal section includes a second base and a second leg extending from the second base, wherein the second base is in sliding contact with the ramped surface.

3. The seal of claim 1 , wherein the seal is formed from a material selected from one of a high-temperature metal alloy, a high-temperature ceramic fiber material, and a high-temperature ceramic fiber composite, or a combination of two or more of a high-temperature metal alloy, a high-temperature ceramic fiber material and a high-temperature ceramic fiber composite.

4. The seal of claim 1 , further comprising:
a coating applied to at least a portion of each of the first and second seal sections.

5. The seal of claim 1 , further comprising:
a sheath covering at least a portion of each of the first and second seal sections.

6. The seal of claim 1 , wherein:
the first and second seal sections are substantially annular.

7. The seal of claim 6 , wherein the first and second seal sections respectively define first and second gaps at respective opposed ends thereof.

8. The seal of claim 7 , further comprising a bridging seal disposed adjacent the first and second seal sections and at least partially covering the first and second gaps.

9. The seal of claim 1 , wherein the first and second seal sections comprise machined rings.

10. The seal of claim 1 , wherein the first and second seal sections comprise formed sheet metal.

11. A system, comprising:
a first circumferential component including a first surface;
a second circumferential component including a second surface, the second circumferential component disposed adjacent the first circumferential component and defining a seal cavity therebetween; and
a seal disposed in the seal cavity, the seal including:
a first seal section including a first base defining a ramped surface and a first leg extending from the first base, wherein an angle between the first base and the first leg comprises greater than 90 degrees; and
a second seal section in sliding contact with the ramped surface;
wherein the first seal section is configured to sealingly engage with the first circumferential component along a single first circumferential line of contact and to sealingly engage with the second circumferential component along a single second circumferential line of contact; and
wherein the second seal section is configured to sealingly engage with the second circumferential component along a single third circumferential line of contact; and

wherein pressure within the seal cavity urges the seal to seat against the first surface and the second surface; and
wherein relative movement of the first component and the second component toward or away from one another causes the second seal section to slide on the ramped surface of the first seal section such that the seal is not substantially deflected.

12. The seal of claim 11 , wherein the second seal section includes a second base and a second leg extending from the second base, wherein the second base is in sliding contact with the ramped surface.

13. The seal of claim 11 , wherein the seal is formed from a material selected from one of a high-temperature metal alloy, a high-temperature ceramic fiber material, and a high-temperature ceramic fiber composite, or a combination of two or more of a high-temperature metal alloy, a high-temperature ceramic fiber material and a high-temperature ceramic fiber composite.

14. The seal of claim 11 , further comprising:
a coating applied to at least a portion of each of the first and second seal sections.

15. The seal of claim 11 , further comprising:
a sheath covering at least a portion of each of the first and second seal sections.

16. The seal of claim 11 , wherein:
the first and second seal sections are substantially annular.

17. The seal of claim 16 , wherein the first and second seal sections respectively define first and second gaps at respective opposed ends thereof.

18. The seal of claim 17 , further comprising a bridging seal disposed adjacent the first and second seal sections and at least partially covering the first and second gaps.

19. The seal of claim 11 , wherein the first and second seal sections comprise machined rings.

20. The seal of claim 11 , wherein the first and second seal sections comprise formed sheet metal.

Assignees

• United Technologies Corp

Inventors

• Davis Timothy M

Classifications

• F05D2220/32

  in gas turbines · CPC title

• F05D2240/55

  Seals · CPC title

• F16J15/104

  characterised by structure · CPC title

• F01D11/005 Primary

  Sealing means between non relatively rotating elements · CPC title

• F16J15/0887 Primary

  the sealing effect being obtained by elastic deformation of the packing · CPC title