Ceramic matrix composite ring shroud retention methods-wiggle strip spring seal

Patent metadata

Field	Value
Publication number	US-10094244-B2
Application number	US-201514858542-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Sep 18, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

The present disclosure is directed to a retention assembly for a stationary gas turbine component. The retention assembly includes a first stationary gas turbine wall having a first surface. A retention boss extends outwardly from the first surface. The retention assembly includes a second stationary gas turbine wall having a second surface. A retainer is positioned between the first and the second surfaces. The retainer includes a base wall positioned adjacent to the retention boss. A first sidewall extends outwardly from the base wall, and a second sidewall extends outwardly from the base wall. A first arm extends outwardly from the first sidewall, and a second arm extends outwardly from the second sidewall. Each of the first arm and the second arm includes a plurality of convolutions. At least one of the plurality of convolutions is in contact with the second surface.

First claim

What is claimed is:

1. A retention assembly for a stationary gas turbine component, comprising:
a first stationary gas turbine wall comprising a first surface and a retention boss extending outwardly from the first surface;
a second stationary gas turbine wall comprising a second surface; and
a retainer positioned between the first surface and the second surface, the retainer comprising: a base wall positioned adjacent to the retention boss of the first stationary gas turbine wall;
a first sidewall extending outwardly from the base wall;
a second sidewall extending outwardly from the base wall;
a first arm extending outwardly from the first sidewall; and
a second arm extending outward from the second sidewall, wherein each of the first arm and the second arm comprises a plurality of convolutions, and wherein at least one of the plurality of convolutions is in contact with the second surface;
wherein each of the first sidewall and the second sidewall contacts the retention boss;
wherein the first stationary gas turbine wall is a turbine shroud mount and the second stationary gas turbine wall is a turbine shroud, wherein the retainer is radially inward of the first stationary gas turbine wall, and wherein the second gas turbine wall is radially inward of the retainer;
wherein the plurality of convolutions comprises a first convolution and a second convolution, and wherein the base wall is positioned radially between the first convolution and the second convolution.

2. The retention assembly of claim 1 , wherein the retention boss comprises a plurality of axially aligned and circumferentially spaced apart retention bosses and the retainer comprises a plurality of axially aligned and circumferentially spaced apart retainers.

3. The retention assembly of claim 1 , wherein the base wall, the first sidewall, and the second sidewall collectively define a slot that receives the retention boss to substantially prevent circumferential movement between the first stationary gas turbine wall and the second stationary gas turbine wall,
wherein the base wall comprises a circumferential length,
wherein the first sidewall comprises a first radial length,
wherein the second sidewall comprises a second radial length, and
wherein the circumferential length of the base wall is longer than each of the first and second radial lengths.

4. The retention assembly of claim 3 , wherein the retention boss extends radially inward from the first stationary gas turbine wall and the slot opens radially outward,
wherein the retention boss comprises a radial length, and
wherein the radial length of the retention boss is greater than each of the radial length of the first sidewall and the radial length of the second sidewall.

5. The retention assembly of claim 1 , wherein more than one of the plurality of convolutions is in contact with the second surface, and
wherein the retention boss has a rectangular cross section.

6. The retention assembly of claim 1 , wherein each of the plurality of convolutions is radially spaced apart from the first surface.

7. The retention assembly of claim 1 , wherein the plurality of convolutions comprises a plurality of alternating concave and convex convolutions.

8. The retention assembly of claim 1 , wherein the first arm and the second arm extend substantially perpendicular to the base wall when the retention assembly is unassembled.

9. A gas turbine, comprising:
a compressor;
a combustion section;
a turbine section comprising:
a first stationary wall comprising a first surface and a retention boss extending outwardly from the first surface; and
a second stationary wall comprising a second surface; and
a retainer positioned between the first surface and the second surface, the retainer comprising:
a base wall;
a first sidewall extending outwardly from the base wall;
a second sidewall extending outwardly from the base wall;
a first arm extending outwardly from the first sidewall; and
a second arm extending outwardly from the second sidewall, wherein each of the first arm and the second arm comprises a plurality of convolutions, and wherein at least one of the plurality of convolutions is in contact with the second surface, and
wherein each of the first sidewall and the second sidewall contacts the retention boss;
wherein the first stationary wall is a turbine shroud mount and the second stationary wall is a turbine shroud, wherein the retainer is radially inward of the first stationary wall, and wherein the second stationary wall is radially inward of the retainer;
wherein the plurality of convolutions comprises a first convolution and a second convolution, and wherein the base wall is positioned radially between the first convolution and the second convolution.

10. The gas turbine of claim 9 , wherein the second surface comprises a radially outer wall of the turbine shroud.

11. The gas turbine of claim 10 , wherein the retention boss comprises a plurality of axially aligned and circumferentially spaced apart retention bosses and the retainer comprises a plurality of axially aligned and circumferentially spaced apart retainers, the plurality of axially aligned and circumferentially spaced apart retention bosses comprising four retention bosses each spaced apart 90 degrees.

12. The gas turbine of claim 9 , wherein the base wall, the first sidewall, and the second sidewall collectively define a slot that receives the retention boss to substantially prevent circumferential movement between the first stationary wall and the second stationary wall, and wherein the plurality of axially aligned and circumferentially spaced apart retainers collectively extend 360 degrees around a radially outer wall of the turbine shroud.

13. The gas turbine of claim 12 , wherein the retention boss extends radially inward from the first stationary wall and the slot opens radially outward, and wherein the base wall contacts the retention boss.

14. The gas turbine of claim 9 , wherein more than one of the plurality of convolutions is in contact with the second surface, and
wherein the retainer is longer in an axial direction than in a radial direction.

15. The gas turbine of claim 9 , wherein each of the plurality of convolutions is radially spaced apart from the first surface, and
wherein the first surface comprises a radially inner wall of a turbine shroud mount.

16. The gas turbine of claim 9 , wherein the plurality of convolutions comprises a plurality of alternating concave and convex convolutions, and wherein the base wall is positioned radially between the alternating concave and convex convolutions.

17. The gas turbine of claim 9 , wherein the first arm and the second arm extend substantially perpendicular to the base wall when the retention assembly is unassembled.

Assignees

• Gen Electric

Inventors

• Fitzpatrick Dylan James
• Tura Christopher Paul

Classifications

• F05D2300/6033

  Ceramic matrix composites [CMC] · CPC title

• F01D9/02

  Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)} · CPC title

• F02C3/04

  having a turbine driving a compressor (power transmission arrangements F02C7/36; control of working fluid flow F02C9/16) · CPC title

• F01D11/003

  by packing rings; Mechanical seals · CPC title

• F05D2260/30

  Retaining components in desired mutual position · CPC title