Patent ID: 6036437
Filing Date: 2000-03-14
Classification: F01D,F05D,F16J

Abstract:
In a turbine having a plurality of rotatable buckets and a stationary shroud surrounding the rotatable buckets, a seal between said buckets and said stationary shroud, comprising:a plurality of arcuate covers carried by radially outer ends of said buckets for rotation with said buckets about an axis in a predetermined circumferential direction, said covers having leading and trailing edges in the direction of rotation of the buckets and radially outer circumferentially and axially extending surfaces in radial registration with the stationary shroud; anda brush seal comprising a plurality of bristles projecting from the shroud for engagement with said cover surfaces forming said seal therebetween;a leading edge portion of the cover surface of each cover in the direction of rotation of said covers being radially inset relative to said cover surface thereof to afford a smooth transition for the bristles from a leading cover to an immediately adjacent trailing cover as said covers are displaced circumferentially past the bristles.