CMC hanger sleeve for CMC shroud

Patent metadata

Field	Value
Publication number	US-10472989-B2
Application number	US-201415111038-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Jan 17, 2014
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

According to some embodiments, a ceramic matrix composite (CMC) hanger sleeve is provided for retaining a ceramic matrix composite shroud panel. The sleeve may be connected to an upper hanger by a retainer or a casing. The hanger sleeve includes a radially inward opening with a flowpath panel disposed therein. When the CMC flowpath panel is worn due to time, rubs or both, the panel may be replaced without need to replace the entire assembly.

First claim

What is claimed is:

1. A ceramic matrix composite (CMC) hanger assembly, comprising:
a CMC hanger sleeve having a first CMC hanger sleeve leg and a second CMC hanger sleeve leg, wherein the first and second CMC hanger sleeve legs are spaced apart at a radial inward end;
a CMC flowpath panel disposed between the first and second CMC hanger sleeve legs at the radial inward end;
a spacing between a radial outer end of the first and second CMC hanger sleeve legs; and,
a cooling air flowpath passing through the CMC hanger sleeve and cooling the CMC flowpath panel,
wherein the first leg and the second leg have a surface for engaging a shoulder of the flowpath panel.

2. The ceramic matrix composite hanger assembly of claim 1 , further comprising an upper shroud hanger connectable to a turbine case.

3. The ceramic matrix composite hanger assembly of claim 2 , further comprising a retainer disposed adjacent to the hanger sleeve, wherein the retainer has a dimension in one direction which is greater than a window of the hanger sleeve in the one direction.

4. The ceramic matrix composite hanger assembly of claim 3 , wherein the first CMC hanger sleeve leg and the second CMC hanger sleeve leg is a unitary structure.

5. The ceramic matrix composite hanger assembly of claim 4 , wherein the unitary structure is an inverted U-shape in section.

6. The ceramic matrix composite hanger assembly of claim 3 , further comprising a fastener passing through the upper shroud hanger to the retainer.

7. The ceramic matrix composite hanger assembly of claim 2 , wherein the upper shroud hanger has a first leg and a second leg.

8. The ceramic matrix composite hanger assembly of claim 7 , wherein the first hanger sleeve leg is fastened to the upper shroud hanger.

9. The ceramic matrix composite hanger assembly of claim 8 , wherein the second hanger sleeve leg is fastened to the upper shroud hanger.

10. The ceramic matrix composite hanger assembly of claim 1 , further comprising a leaf seal extending between one of an upper shroud hanger and a retainer and the CMC flowpath panel.

11. The ceramic matrix composite hanger assembly of claim 1 , wherein the CMC flowpath panel is U-shaped.

12. The ceramic matrix composite hanger assembly of claim 11 , wherein the shoulder is horizontal.

13. The ceramic matrix composite hanger assembly of claim 11 , wherein the shoulder is angled.

14. The ceramic matrix composite hanger assembly of claim 1 , further comprising an upper shroud hanger connectable to a turbine case, wherein the cooling air flowpath extends through the upper shroud hanger.

15. The ceramic matrix composite hanger assembly of claim 14 , wherein the first CMC hanger sleeve leg and the second CMC hanger sleeve leg is a unitary structure.

16. The ceramic matrix composite hanger assembly of claim 1 , further comprising a retainer disposed adjacent to the spacing, wherein the retainer has a dimension in one direction which is greater than the spacing in the one direction.

17. A ceramic matrix composite (CMC) hanger assembly, comprising:
a CMC hanger sleeve having a first CMC hanger sleeve leg and a second CMC hanger sleeve leg, wherein the first and second CMC hanger sleeve legs are spaced apart at a radial inward end;
a CMC flowpath panel disposed between the first and second CMC hanger sleeve legs at the radial inward end;
a spacing between a radial outer end of the first and second CMC hanger sleeve legs;
a cooling air flowpath passing through the CMC hanger sleeve and cooling the CMC flowpath panel;
an upper shroud hanger connectable to a turbine case, the cooling air flowpath extending through the upper shroud hanger; and,
first and second retaining legs depending from the upper shroud hanger,
wherein at least a portion of the CMC hanger sleeve is integrally formed, and
wherein the first and second CMC hanger sleeve legs are connected to the depending retaining legs.

18. The ceramic matrix composite hanger assembly of claim 17 , wherein the CMC hanger sleeve first leg and second leg are independent of one another.

19. A ceramic matrix composite (CMC) hanger assembly, comprising:
a CMC hanger sleeve having a first CMC hanger sleeve leg and a second CMC hanger sleeve leg, wherein the first and second CMC hanger sleeve legs are spaced apart at a radial inward end;
a CMC flowpath panel disposed between the first and second CMC hanger sleeve legs at the radial inward end;
a spacing between a radial outer end of the first and second CMC hanger sleeve legs;
a cooling air flowpath passing through the CMC hanger sleeve and cooling the CMC flowpath panel; and,
a leaf seal extending between one of an upper shroud hanger and a retainer and the CMC flowpath panel.

20. The ceramic matrix composite hanger assembly of claim 19 , wherein the CMC flowpath panel is U-shaped, and wherein the CMC flowpath panel has shoulders which are seated on the first and second CMC hanger sleeve legs.

Assignees

• Gen Electric

Inventors

• Stapleton David Scott

Classifications

• F01D25/14 Primary

  Casings modified therefor (double casings F01D25/26) · CPC title

• F05D2300/6033

  Ceramic matrix composites [CMC] · CPC title

• F01D25/246 Primary

  Fastening of diaphragms or stator-rings · CPC title

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• Y02T50/675

  Cross-Sectional Technologies · mapped topic