Supplemental seal for the chordal hinge seal in a gas turbine
First Claim
1. A turbine comprising:
- a turbine nozzle support ring having a generally axially facing first surface;
a turbine nozzle segment having at least one stator vane and a radially inwardly extending inner rail having a second surface in axial opposition to said first surface;
a seal depending from a side surface of said inner rail remote from said second surface and extending radially inwardly of said inner rail for sealing engagement against said first surface to form a seal therebetween;
said seal including a seal segment having at least a first plate, an overlay of a woven metallic cloth and a distal margin covered by said cloth and engaging said first surface; and
a support bracket extending along at least a portion of one side of said seal body to support said seal segment on a side thereof remote from said inner rail, said margin of said seal segment being flexible and preloaded to seal against said first surface.
1 Assignment
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Accused Products
Abstract
In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of the nozzle segment on a high pressure side of the chordal hinge seal. The supplemental seal includes a pair of sheet metal shims overlaid by a woven metallic cloth supported by a bracket secured to a back side surface of the inner rail. The radially inner end of the cloth seal bears against the annular sealing surface of the nozzle support ring. The shims of the legs of the supplemental seal are slit along their distal margin and staggered in a chord-wise direction relative to one another to provide flexibility and effective sealing engagement with the nozzle support ring.
31 Citations
18 Claims
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1. A turbine comprising:
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a turbine nozzle support ring having a generally axially facing first surface;
a turbine nozzle segment having at least one stator vane and a radially inwardly extending inner rail having a second surface in axial opposition to said first surface;
a seal depending from a side surface of said inner rail remote from said second surface and extending radially inwardly of said inner rail for sealing engagement against said first surface to form a seal therebetween;
said seal including a seal segment having at least a first plate, an overlay of a woven metallic cloth and a distal margin covered by said cloth and engaging said first surface; and
a support bracket extending along at least a portion of one side of said seal body to support said seal segment on a side thereof remote from said inner rail, said margin of said seal segment being flexible and preloaded to seal against said first surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A turbine comprising:
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a turbine nozzle support ring having a generally axially facing first surface;
a plurality of turbine nozzle segments each having at least one stator vane and a radially inwardly extending inner rail having a second surface in axial opposition to said first surface;
a seal comprised of a plurality of seal segments each depending from a side surface of said inner rail remote from said second surface and extending radially inwardly of said inner rail for sealing engagement against said first surface to form a seal therewith;
each said seal segment including a first plate, an overlay of a woven metallic cloth and a distal margin covered by said cloth and engaging said first surface; and
a plurality of support brackets extending along one side of said seal segments to support said seal bodies on a high pressure side thereof, said margins of said seal bodies being flexible and preloaded to seal against said first surface. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification