Patent ID: 6764081
Filing Date: 2004-07-20
Classification: F01D,F16J

Abstract:
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 including an inner band having a second surface in axial opposition to said first surface; a flexible seal between said first and second surfaces including a seal body between high and low pressure regions on opposite sides of the seal, said seal body including first and second portions in opposition to one another and coupled to one another along adjoining edges thereof; opposite edges of said first and second portions being spaced from one another defining an opening into a cavity in the seal body between said first and second portions, said first and second portions being preloaded to bear against the first and second surfaces, respectively, with said cavity opening toward the high pressure region; said first and second portions being initially compressed relative to one another such that at least one of said opposite edges is spaced from one of said first and second surfaces and means for releasably retaining said first and second portions in a state of compression with said one opposite edge spaced from said one of said first and second surfaces, said means enabling release of said compressed portions in response to turbine operating conditions.