Patent ID: 6092983
Filing Date: 2000-07-25
Classification: F01D,F05D

Abstract:
A cooled stationary blade assembly for a gas turbine, comprising:an outer shroud;an inner shroud (31);a stationary blade (30), having a front edge and a rear edge, is provided between said outer shroud and said inner shroud (31);first steam cooling means (33A to 33F) provided in an interior of said stationary blade which receive cooling steam (39) in a first passage (33A) adjacent to said front edge of said stationary blade and discharges cooling steam (39) only from a last passage (33F) adjacent to said rear edge of said stationary blade; andsecond steam cooling means (20) provided in the vicinity of an end portion of said inner shroud,wherein said first steam cooling means (33A to 33F) and said second steam cooling means (20) communicate with each other at said first passage (33A) and at said last passage (33F) of said stationary blade, with said first steam cooling means providing a portion of the cooling steam (39) to said second steam cooling means at said first passage (33A) of said stationary blade and said second steam cooling means returning the cooling steam (39) to said first steam cooling means at said last passage (33F) of said stationary blade to recover the cooling steam.