Wrapped dog bone seal

Patent metadata

Field	Value
Publication number	US-10550706-B2
Application number	US-201415038570-A
Country	US
Kind code	B2
Filing date	Oct 24, 2014
Priority date	Dec 12, 2013
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A seal for a gas turbine engine comprises a seal body extending from a first end to a second end. A wrap extends at least partially around the first and second ends of the seal body. A gas turbine engine is also disclosed.

First claim

The invention claimed is:

1. A seal for a gas turbine engine comprising:
a seal body extending from a first end to a second end; and
a wrap extending at least partially around and contacting the first and second ends of the seal body, wherein the wrap comprises a metal material,
wherein the seal body includes a central body portion extending between the first and second ends and defined by a first cross-sectional area, wherein the first and second ends are defined by a second cross-sectional area that is greater than the first cross-sectional area, and
wherein the wrap extends between first and second wrap ends, and wherein the wrap extends along the central body portion with the first wrap end wrapping at least partially around the first end of the seal body and the second wrap end wrapping at least partially around the second end of the seal body.

2. The seal according to claim 1 wherein the seal body has a dog bone cross-sectional shape.

3. The seal according to claim 1 wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second ends of the seal body by an angle of at least sixty degrees, wherein the angle is defined as spanning between first and second points of contact between the seal body and the wrap.

4. The seal according to claim 3 wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second ends of the seal body within a range of 60 to 120 degrees or within a range of 60 to 180 degrees.

5. The seal according to claim 1 wherein the seal body comprises one of a full or split ring seal.

6. The seal according to claim 1 wherein the wrap comprises one of a full or split ring.

7. The seal according to claim 1 wherein the wrap is comprised of sheet metal.

8. The seal according to claim 1 wherein the first end of the seal body comprises a blade outer air seal abutment and is configured for engagement with a blade outer air seal and the second end of the seal body comprises a vane platform abutment and is configured for engagement with a vane platform, and wherein the seal body is moveable relative to the wrap.

9. The seal according to claim 1 wherein the seal body defines an axis extending from the first end to the second end, and wherein the seal body is positioned within a cavity between a vane platform and a blade outer air seal, and wherein the seal exerts an axial load across the cavity.

10. The seal according to claim 9 wherein the first end is in direct engagement with the blade outer air seal and the second end is in direct engagement with the vane platform, and wherein one of the first and second ends is radially outward of the other of the first and second ends when positioned within the cavity.

11. A seal for a gas turbine engine comprising:
a seal body extending from a first end to a second end, wherein the seal body includes a central body portion extending between the first and second ends and defined by a first cross-sectional area, and wherein the first and second ends are defined by a second cross-sectional area that is greater than the first cross-sectional area; and
a wrap extending at least partially around the first and second ends of the seal body, and wherein the wrap extends between first and second wrap ends, and wherein the wrap extends along the central body portion with the first wrap end wrapping at least partially around the first end of the seal body and the second wrap end wrapping at least partially around the second end of the seal body; and
wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second ends of the seal body within one of the following range of angles 60 to 180 degrees, or 60 to 120 degrees, wherein the angle is defined as spanning between first and second points of contact between the seal body and the wrap.

12. A gas turbine engine component comprising:
a blade outer air seal spaced radially outward of an engine central longitudinal axis;
a vane platform positioned adjacent to the blade outer air seal to define a cavity therebetween; and
a seal assembly extending across the cavity between the vane platform and the blade outer air seal, the seal assembly comprising a dog bone seal having first and second seal ends, and a wrap at least partially surrounding and contacting the first and second seal ends; and
wherein the dog bone seal includes a central body portion extending between the first and second seal ends and defined by a first cross-sectional area, and wherein the first and second seal ends are defined by a second cross-sectional area that is greater than the first cross-sectional area, and wherein the wrap extends between first and second wrap ends, and wherein the wrap extends along the central body portion with the first wrap end wrapping at least partially around the first seal end and the second wrap end wrapping at least partially around the second seal end.

13. The gas turbine engine component according to claim 12 wherein the wrap comprises a piece of sheet metal having a first wrap end extending around the first seal end of the dog bone seal and a second wrap end extending around the second seal end of the dog bone seal.

14. The gas turbine engine component according to claim 13 wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second seal ends by an angle of at least sixty degrees, wherein the angle is defined as spanning between first and second points of contact between the dog bone seal and the wrap.

15. The gas turbine engine component according to claim 14 wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second seal ends within a range of 60 to 180 degrees.

16. The gas turbine engine component according to claim 14 wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second seal ends within a range of 60 to 120 degrees.

17. The gas turbine engine component according to claim 13 wherein the wrap is in direct abutting engagement with the dog bone seal, and wherein the first wrap end is in direct abutting engagement with the blade outer air seal and the second wrap end is in direct abutting engagement with the vane platform.

18. The gas turbine engine component according to claim 12 wherein the vane and blade outer air seal are located within a turbine section of the gas turbine engine.

19. The gas turbine engine component according to claim 12 wherein the dog bone seal is comprised of metal.

20. The gas turbine engine component according to claim 19 wherein the wrap comprises a piece of sheet metal.

21. The gas turbine engine component according to claim 12 wherein the first and second wrap ends are in contact with and extend around respective centers of the first and second ends of the dog bone seal within one of the following range of angles 60 to 180 degrees, or 60 to 120 degrees, wherein the angle is defined as spanning between first and second points of contact between the dog bone seal and the wrap.

22. The gas turbine engine component according to claim 12 wherein the cavity is defined by a cavity axial length extending in a direction along the engine central longitudinal axis and the seal assembly is defined by a seal axial length extending in the direction along the engine central longitudinal axis, and wherein the seal ax

Assignees

• United Technologies Corp

Inventors

• Lutjen Paul M
• Rogers Mark J

Classifications

• F05D2230/54

  by sheet metal manufacturing · CPC title

• F01D11/08

  for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20) · CPC title

• F01D9/04

  forming ring or sector · CPC title

• F05D2240/80

  Platforms for stationary or moving blades · CPC title

• F01D11/005 Primary

  Sealing means between non relatively rotating elements · CPC title