Patent ID: 6517314
Filing Date: 2003-02-11
Classification: F01D,F05D,F16J

Abstract:
A steam turbine comprising:a rotatable component including a rotor shaft and a non-rotatable component about said rotatable component; a brush seal carried by said non-rotatable component for sealing engagement with the rotatable component; said rotatable component including a plurality of buckets having bucket dovetails for connection with complementary dovetails on a wheel of said rotatable component; means for inhibiting non-uniform circumferential heat transfer to the rotatable component thereby to eliminate or minimize bow of the rotatable component due to frictional contact between the brush seal and rotatable component; said inhibiting means including an axially extending platform on each said bucket dovetail in frictional engagement with said brush seal at a location spaced radially outwardly of an outer diameter of the rotor shaft; and a labyrinth seal carried by said non-rotatable component including at least one tooth extending between said non-rotatable component and said platform spaced generally radially outwardly from an outer diameter of said rotor shaft.