Gas-path leakage seal for a gas turbine
First Claim
1. A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a gas turbine, said seal comprising:
- a) a generally imperforate foil-layer assemblage consisting essentially of material selected from the group consisting of metals, ceramics, and polymers, generally impervious to gas, disposed in said gas-path leakage-gap, spaced apart from said first member, having a foil-assemblage edge and generally opposing first and second foil-assemblage outer surfaces extending to said foil-assemblage edge, and having a first foil layer wherein said first foil layer has a lengthwise direction and wherein a cross section of said first foil layer normal to said lengthwise direction does not itself completely enclose other structure; and
b) a woven, non-impregnated, cloth-layer assemblage generally pervious to gas, contacting said first member, and having a first cloth layer covering and contacting generally the entire first foil-assemblage outer surface, and covering and contacting generally the entire second foil-assemblage outer surface, wherein said foil-layer assemblage consists essentially of material selected from the group consisting of metals, ceramics, and polymers, and wherein said first cloth layer covers generally the entire foil-assembly edge.
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Accused Products
Abstract
A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a gas turbine (such as first and second segments of a gas turbine combustor casing). The seal includes a generally imperforate foil-layer assemblage which is generally impervious to gas, is located in the leakage-gap, is spaced apart from the first member, and has a first foil layer. The seal also includes a cloth-layer assemblage contacting the first member and having a first cloth layer generally enclosing and generally enclosingly-contacting the foil-layer assemblage. The first foil layer is made from a metal, ceramic, and/or polymer. The first cloth layer is made from metal, ceramic, and/or polymer fibers. The foil assemblage provides for sealing and flexibility, and the cloth assemblage provides for wear resistance and flexibility. The seal accommodates different surface shapes, assembly misalignment, vibration, and differential thermal growth of the gas turbine members.
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Citations
12 Claims
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1. A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a gas turbine, said seal comprising:
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a) a generally imperforate foil-layer assemblage consisting essentially of material selected from the group consisting of metals, ceramics, and polymers, generally impervious to gas, disposed in said gas-path leakage-gap, spaced apart from said first member, having a foil-assemblage edge and generally opposing first and second foil-assemblage outer surfaces extending to said foil-assemblage edge, and having a first foil layer wherein said first foil layer has a lengthwise direction and wherein a cross section of said first foil layer normal to said lengthwise direction does not itself completely enclose other structure; and b) a woven, non-impregnated, cloth-layer assemblage generally pervious to gas, contacting said first member, and having a first cloth layer covering and contacting generally the entire first foil-assemblage outer surface, and covering and contacting generally the entire second foil-assemblage outer surface, wherein said foil-layer assemblage consists essentially of material selected from the group consisting of metals, ceramics, and polymers, and wherein said first cloth layer covers generally the entire foil-assembly edge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification