Two pieces stator inner shroud

Patent metadata

Field	Value
Publication number	US-10557364-B2
Application number	US-201615358858-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Nov 22, 2016
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

An inner shroud segment may include an inner housing and an outer housing. The inner housing may have a radial curve centered relative to an axis with a radial wall and a bottom wall that define a first channel. The outer housing may have a first axial wall, a first circumferential wall, and a second axial wall that define a second channel. The outer housing may also be disposed within the first channel with the radial wall of the inner housing contacting the first axial wall, the first circumferential wall, and/or the second axial wall. A compliant material may be disposed within the second channel and coupled to the radial wall and the first axial wall, the first circumferential wall, and/or the second axial wall.

First claim

What is claimed is:

1. An inner shroud segment, comprising:
an inner housing having a radial curve centered relative to an axis; wherein the inner housing comprises a first radial wall, a second radial wall, and a bottom wall that define a first channel;
an outer housing disposed within the first channel of the inner housing,
the outer housing having a first axial wall, a first circumferential wall, and a second axial wall, wherein the first circumferential wall is joined orthogonally between the first axial wall and the second axial wall to define a second channel extending orthogonally between the first radial wall and the second radial wall of the inner housing, wherein at least one of the first radial wall or the second radial wall of the inner housing contact at least one of the first axial wall, the first circumferential wall, or the second axial wall; and
a compliant material disposed in the second channel and coupled to the radial wall and at least one of the first axial wall, the first circumferential wall, or the second axial wall.

2. The inner shroud segment of claim 1 , wherein the outer housing comprises a third axial wall joined to the second axial wall by an orthogonal wall, wherein the orthogonal wall defines an enclosed cavity bonded by each of the second axial wall and the third axial wall of the outer housing, each of the first radial wall and the second radial wall of the inner housing, and between the orthogonal wall of the outer housing and the bottom wall of the inner housing.

3. The inner shroud segment of claim 2 , wherein the compliant material is deposited outside the cavity.

4. The inner shroud segment of claim 1 , further comprising a vane extending into the second channel and contacting the compliant material.

5. The inner shroud segment of claim 1 , wherein an exposed surface of the compliant material is substantially coplanar with a surface of the outer housing.

6. The inner shroud segment of claim 1 , wherein the inner housing comprises a bent sheet of metal.

7. The inner shroud segment of claim 1 , wherein the compliant material retains the outer housing in position relative to the inner housing.

8. An inner shroud, comprising:
an inner shroud segment with a radial curve centered about an axis, comprising,
an inner housing, and
an outer housing disposed within the inner housing and defining a channel facing away from the inner housing and an enclosed cavity between outer housing and the inner housing, wherein the channel is filled by a compliant material;

a vane at least partially retained within the channel of the outer housing; and
wherein the compliant material is coupled to the vane, the inner housing, and the outer housing, wherein the compliant material retains the inner housing relative to the outer housing, and
wherein the channel and the cavity extend parallel to the axis.

9. The inner shroud of claim 8 , wherein:
the inner housing comprises a first radial wall, a second radial wall, and a bottom wall extending parallel the axis and between the first radial wall and the second radial wall to define a channel of the inner housing; and
the outer housing comprises a first axial wall, a first circumferential wall, and a second axial wall, wherein the first circumferential wall is joined orthogonally between the first axial wall and the second axial wall to define the channel facing away from the inner housing, wherein the outer housing is disposed within the channel of the inner housing to further define the enclosed cavity between the first radial wall and the second radial wall of the inner housing.

10. The inner shroud of claim 8 , wherein the compliant material is deposited outside of the cavity.

11. The inner shroud of claim 8 , wherein an exposed surface of the compliant material is substantially coplanar with a surface of the outer housing.

12. The inner shroud of claim 8 , wherein the inner shroud segment is made from sheet metal.

13. The inner shroud of claim 8 , wherein the inner shroud segment is made from a composite material.

14. The inner shroud of claim 8 , wherein the inner housing comprises an axial wall in contact with a terminus wall of the outer housing, wherein the terminus wall is coplanar with a surface of the compliant material.

15. The inner shroud of claim 8 , wherein the outer housing comprises an terminus wall oriented axially and contacting a bottom wall of the inner housing.

16. A gas turbine engine, comprising:
a compressor section comprising a vane retained in an inner shroud segment, comprising:
an inner housing, and
an outer housing disposed within the inner housing and defining a channel facing away from the inner housing and an enclosed cavity between outer housing and the inner housing, wherein the channel is filled by a compliant material;

a combustor section aft of the compressor section; and
a turbine section aft of the compressor section and coupled to the compressor section by a shaft,
wherein the channel and the cavity extend parallel the shaft.

17. The gas turbine engine of claim 16 , wherein:
the inner housing comprises a first radial wall, a second radial wall, and a bottom wall extending parallel the shaft and between the first radial wall and the second radial wall to define a channel of the inner housing; and
the outer housing comprises a first axial wall, a first circumferential wall, and a second axial wall, wherein the first circumferential wall is joined orthogonally between the first axial wall and the second axial wall to define the channel facing away from the inner housing, wherein the outer housing is disposed within the channel of the inner housing to further define the enclosed cavity between the first radial wall and the second radial wall of the inner housing, wherein the first circumferential wall contacts the bottom wall.

18. The gas turbine engine of claim 16 , further comprising a compliant material coupled to the inner housing, the outer housing, and the vane.

19. The gas turbine engine of claim 18 , wherein an exposed surface of the compliant material is substantially coplanar with a surface of the outer housing.

20. The gas turbine engine of claim 16 , wherein the inner shroud segment is made from sheet metal.

Assignees

• United Technologies Corp

Inventors

• Amadon Colin
• Freeman Thomas

Classifications

• F01D25/06

  for preventing blade vibration (means on blade-carrying members or blades F01D5/00) · CPC title

• F05D2300/437

  Silicon polymers · CPC title

• F05D2250/182

  crenellated, notched · CPC title

• F01D9/044 Primary

  permanently, e.g. by welding, brazing, casting or the like · CPC title

• F01D9/041

  using blades (F01D5/148 takes precedence) · CPC title