Patent ID: 6068443
Filing Date: 2000-05-30
Classification: F01D

Abstract:
An arrangement in a gas turbine comprising:a gas turbine casing having an interior with an upstream direction and a downstream direction;a gas turbine moving blade having a tip shroud on the interior of said gas turbine casing, said tip shroud having an upstream end portion; anda cavity surrounded by said gas turbine casing and said gas turbine moving blade having said tip shroud, said cavity being formed so as to have a recess portion having a substantially U shape formed by said gas turbine casing opposite to said upstream end portion of said tip shroud, and a projecting portion projecting substantially axially toward said recess portion from said upstream end portion of said tip shroud so as to neither contact with said recess portion at the time of a cold start nor contact with said recess portion when under thermal expansion at the time of a heat run.