Shroud assembly and seal for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-9745854-B2
Application number	US-201314396811-A
Country	US
Kind code	B2
Filing date	Apr 26, 2013
Priority date	Apr 27, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A shroud assembly having rope seals disposed between the shroud hangers and the surrounding case structure.

First claim

What is claimed is:

1. A shroud assembly for a gas turbine engine, said shroud assembly comprising:
an annular array of arcuate shroud segments;
a plurality of stationary case components surrounding said shroud segments;
a plurality of arcuate shroud hangars located between said shroud segments and said stationary case components and supporting said shroud segments; and
at least four rope seals, wherein one rope seal is disposed between a forward flange of said shroud segments and a forward inner flange of said shroud hangars, one rope seal is disposed between an aft flange of said shroud segments and an aft inner flange of said shroud hangars, one rope seal is disposed between a forward rail of said shroud hangars and said stationary case components, and one rope seal is disposed between an aft outer flange of said shroud hangars and an aft hook of said stationary case components.

2. A shroud assembly in accordance with claim 1 , wherein said rope seals are formed from a material selected from the group consisting of stainless steel braid, INCONEL alloy braid filled with silica, and combinations thereof.

3. A shroud assembly in accordance with claim 1 , wherein said rope seals are retained in a cavity formed between said shroud hangars and said stationary case components.

4. A shroud assembly in accordance with claim 1 , wherein said rope seals have a generally circular cross-sectional shape.

5. A shroud assembly in accordance with claim 1 , wherein said rope seals are partially crushed between said shroud hangars and said stationary case components.

6. A shroud assembly in accordance with claim 1 , wherein said rope seals span a full 360 degree arc.

7. A shroud assembly in accordance with claim 1 , wherein said rope seals are retained in a cavity formed between opposing flanges of said shroud hangars and said stationary case components.

Assignees

• Gen Electric

Inventors

• Baldiga Jonathan David
• Lenihan Meghan Mary
• Shapiro Jason David

Classifications

• F01D5/225 Primary

  by shrouding · CPC title

• F01D25/246

  Fastening of diaphragms or stator-rings · CPC title

• F01D11/005

  Sealing means between non relatively rotating elements · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• F01D11/003 Primary

  by packing rings; Mechanical seals · CPC title