Patent ID: 6102655
Filing Date: 2000-08-15
Classification: F01D

Abstract:
A device for sealing a gap between at least one moving blade and a stator of a turbomachine, comprising:said stator having a conical contour and including at least one cavity;at least one encircling shroud plate disposed at a distal end of said at least one moving blade, said at least one shroud plate projecting towards said at least one cavity of said stator and making a seal against said stator, said at least one shroud plate being stepped in configuration;sealing strips disposed on said stator, each said sealing strip acting on said stepped at least one shroud plate and enclosing a vortex chamber;an axially extending labyrinth inlet located between said at least one shroud plate and said at least one cavity of said stator, wherein said at least one cavity of said stator is contoured at said labyrinth inlet to include a recessed portion and a toothed portion projecting outward, said at least one shroud plate being provided with a recess which corresponds to a shape of said toothed portion of said at least one cavity; anda curved sealing strip disposed between said recess of said at least one shroud plate and said at least one cavity in a substantially axial direction.