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Gas-path leakage seal for a gas turbine

  • US 5,657,998 A
  • Filed: 12/14/1995
  • Issued: 08/19/1997
  • Est. Priority Date: 09/19/1994
  • Status: Expired due to Term
First Claim
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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:

  • 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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