Patent ID: 6206378
Filing Date: 2001-03-27
Classification: F01D,F16J

Abstract:
A spindle bolt seal device of a gas turbine which is constructed such that discs are fastened to be connected to each other by a spindle bolt and steam is used for cooling of a high temperature portion to be then recovered, wherein a seal hole is formed in a turbine disc portion through which said spindle bolt passes, a seal piece is fitted around said spindle bolt in said seal hole, said seal piece being made of a material having a smaller coefficient of linear expansion than said spindle bolt, a seal piece cover is disposed so as to cover said seal piece in said seal hole and there is bored in said seal piece cover a pressure hole through which a high pressure side steam pressure is introduced into an inner side of said seal piece cover so as to urge said seal piece in said seal piece cover into contact with a surface of said seal hole.