Hybrid rubber grommet for potted stator

Patent metadata

Field	Value
Publication number	US-11326461-B2
Application number	US-201916571435-A
Country	US
Kind code	B2
Filing date	Sep 16, 2019
Priority date	Sep 16, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A hybrid grommet assembly for a vane comprising a body portion comprising a first lip opposite a second lip forming a slot receiver, said slot receiver configured to receive a shroud slot of a shroud; said body portion comprising a vane receiver extending from said body portion and configured to receive a vane; a fiber integral within said body portion; and a potting coupled to said grommet proximate said vane receiver, wherein said potting fills a gap between the grommet and the vane.

First claim

What is claimed is:

1. A hybrid grommet assembly for a vane comprising:
a body portion comprising a first lip opposite a second lip forming a slot receiver, said slot receiver configured to receive a shroud slot of a shroud; said body portion comprising a vane receiver extending from said body portion and configured to receive a vane, the vane receiver configured to directly couple the vane to the grommet;
a fiber integral within said body portion; and
an adhesive rubber potting coupled to said grommet proximate said vane receiver, wherein said potting fills a gap between the grommet and the vane.

2. The hybrid grommet assembly according to claim 1 , wherein said fiber extends into each of the first lip, the second lip, the body portion proximate the slot receiver and the vane receiver of the grommet.

3. The hybrid grommet assembly according to claim 1 , wherein said potting is located between the grommet body portion at least one of above and below the vane receiver and coupled to the vane above the shroud.

4. The hybrid grommet assembly according to claim 3 , wherein the potting is located proximate the vane receiver below the shroud.

5. The hybrid grommet assembly according to claim 1 , wherein said slot receiver is configured to couple the grommet to the shroud.

6. The hybrid grommet assembly according to claim 1 , wherein said fiber comprises strands of fabric.

7. The hybrid grommet assembly according to claim 1 , wherein said body portion between the vane and the slot of the shroud has a thickness of about 0.03 inches and the potting has a thickness of about 0.07 inches.

8. A vane and shroud assembly with a hybrid grommet assembly comprising:
an inner shroud concentric with an outer shroud defining an annular gas flow path therebetween;
a plurality of vanes extending radially between the outer shroud and the inner shroud;
a grommet assembly coupled to the vane proximate said outer shroud and said inner shroud, each of said outer shroud and said inner shroud having a slot, said grommet assembly comprising:
a grommet having a body portion comprising a first lip opposite a second lip forming a slot receiver, said slot receiver configured to receive the slot; said body portion comprising a vane receiver extending from said body portion and configured to receive said vane, the vane receiver directly couples the vane to the grommet;
a fiber integral within said body portion; and
an adhesive rubber potting coupled to said grommet proximate said vane receiver, wherein said potting fills a gap between the grommet and the vane.

9. The vane and shroud assembly with a hybrid grommet assembly according to claim 8 , wherein said fiber extends into each of the first lip, the second lip, the body portion proximate the slot receiver and the vane receiver of the grommet.

10. The vane and shroud assembly with a hybrid grommet assembly according to claim 8 , wherein said potting is located between the grommet body portion above and below the vane receiver and coupled to the vane above the outer shroud and below the inner shroud away from the annular gas flow path.

11. The vane and shroud assembly with a hybrid grommet assembly according to claim 8 , wherein the potting is located proximate the vane receiver and proximate the annular gas flow path.

12. The vane and shroud assembly with a hybrid grommet assembly according to claim 8 , wherein said fiber comprises strands of fabric.

13. The vane and shroud assembly with a hybrid grommet assembly according to claim 8 , wherein said slot receiver is configured to couple the grommet to the slot.

14. A process for attaching a vane to a shroud slot comprising:
providing a shroud having an upper surface and a lower surface, said shroud having a slot;
attaching a grommet to said shroud, wherein said grommet comprises:
a body portion comprising a first lip opposite a second lip forming a slot receiver, said slot receiver configured to receive the slot; said body portion comprising a vane receiver extending from said body portion and configured to receive a vane, the vane receiver directly couples the vane to the grommet;
a fiber integral within said body portion, wherein said fiber extends into each of the first lip, the second lip, the body portion proximate the slot receiver and the vane receiver of the grommet;
inserting the vane into the vane receiver; and
coupling an adhesive rubber potting to said grommet proximate said vane receiver, wherein said potting fills a gap between the grommet and the vane.

15. The process of claim 14 , wherein said potting is located between the grommet body portion above and below the vane receiver and coupled to the vane above the shroud.

16. The process of claim 14 , wherein said fiber comprises strands of fabric.

17. The process of claim 14 , wherein the potting is located proximate the vane receiver opposite the shroud.

18. The process of claim 14 , further comprising;
varying a thickness of the potting to fit said grommet in said slot.

19. The process of claim 18 , wherein said body portion between the vane and the slot of the shroud has a thickness of about 0.03 inches and the potting has a thickness of about 0.07 inches.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Amadon Colin G
• Freeman Thomas

Classifications

• F01D11/001 Primary

  for sealing space between stator blade and rotor · CPC title

• F05D2260/30

  Retaining components in desired mutual position · CPC title

• F01D11/005

  Sealing means between non relatively rotating elements · CPC title

• F05D2240/12

  Fluid guiding means, e.g. vanes · CPC title

• F05D2220/32

  in gas turbines · CPC title