SHAFT SEAL STRUCTURE AND TURBINE

摘要

The shaft seal structure is based on a leaf seal 25 that includes springs, disposed between the stator blades 24a and the leaf seal ring 26, to force the leaf seal ring 26 away from the rotation shaft 23, and pressure guiding grooves 34 for guiding the fluid pressure, through a boundary of planar plates 28, to a space between the outer peripheral surface of the leaf seal ring 26 and the inner peripheral surface of the stator blade 24a. Also, a turbine may be provided with the leaf seal so as to reduce gas leakage from the high-pressure-region to the low-pressure-region as well as to control the frictional wear between the planar plates and the rotation shaft.