Patent ID: 6224327
Filing Date: 2001-05-01
Classification: F01D,F02C,F05D

Abstract:
A steam-cooling type gas turbine, comprising:a turbine shaft for supporting plural stages of disks and plural stages of moving blades;a first steam feeding passage formed internally of said turbine shaft so as to feed steam from a rear end side of said turbine shaft along an axial direction thereof;a plurality of second steam feeding passages for introducing the steam into said disks from said first steam feeding passage to thereby feed said steam to said moving blades for cooling thereof;first steam recovering passages formed in said disks, respectively, so as to receive and recover the steam after cooling of said individual moving blades; anda second steam recovering passage provided internally of said turbine shaft in communication with said first steam recovering passages, respectively, so as to recover the steam after cooling of said moving blades;wherein said first steam feeding passage is so provided as to extend through a center portion of said turbine shaft, while said second steam recovering passage is so provided as to extend along the outer periphery of said first steam feeding passage, and wherein said second steam feeding passages and said first steam recovering passages pass through substantially radially intermediate portions of each disk, respectively.