Patent ID: 7056084
Filing Date: 2006-06-06
Classification: F01D,F02C,F05D

Abstract:
1. A steam turbine, comprising: a casing; a rotor rotatably installed in the casing and having a first space formed therebetween; a plurality of turbine stages disposed in the turbine, at least one of the turbine stages including a turbine nozzle and including a moving blade that is fixed to the rotor; a steam pass including the at least one turbine stage; a nozzle box, positioned in the first space between the casing and the rotor, for providing a heated steam to the steam pass, wherein the nozzle box includes at least one wall; at least one cover plate positioned adjacent to an outer surface of the nozzle box, to cover at least a portion of the nozzle box; a steam cooling path provided in the wall; and at least one cooling steam outlet port that traverses through the wall, to pass cooling steam inside the cooling steam path toward the cover plate.