Leaf seal for gas turbine stator shrouds and a nozzle band

The present invention relates to a seal for sealing between a stator shroud and a leading edge of a nozzle wall along the outer band of a nozzle segment defining in part the hot gas path through the gas turbine. A leaf seal assembly is secured to the trailing edge of a shroud segment for sealing bet...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Burdgick, Steven Sebastian, Sexton, Brendan Francis
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention relates to a seal for sealing between a stator shroud and a leading edge of a nozzle wall along the outer band of a nozzle segment defining in part the hot gas path through the gas turbine. A leaf seal assembly is secured to the trailing edge of a shroud segment for sealing between the shroud segment and the leading edge side wall of a nozzle outer band. The leaf seal includes a circumferentially elongated seal plate biased by a pair of spring clips disposed in a groove along the trailing edge of the shroud segment to maintain the seal plate in engagement with the flange on the leading edge side wall of the nozzle outer band. The leaf seal plate and spring clips receive pins tack-welded to the shroud segment to secure the leaf seal assembly in place.