Patent ID: 6146091
Filing Date: 2000-11-14
Classification: F01D,Y02T

Abstract:
A gas turbine comprising:a ring segment for forming a casing in which a high temperature combustion main stream gas passes;an impingement cooling plate, surrounding an outer periphery of said ring segment so as to form a ring segment cavity between said ring segment and said impingement cooling plate;a box provided on an inside periphery of a static vane to form a static vane inside diameter side cavity, said static vane being disposed between a movable vane and an adjacent movable vane thereof operated by the main stream gas in the casing, wherein sealing air introduced into said static vane inside diameter side cavity is fed to another cavity formed in a gap between the movable vane and the static vane so that a pressure therein is kept higher than a pressure in a gas path; anda pressure partition plate extending in a circumferential direction between said ring segment and said impingement cooling plate, said pressure partition plate dividing said ring segment cavity in the axial direction so as to provide an upstream cavity and a downstream cavity, wherein an internal pressure of said upstream cavity is maintained at a higher internal pressure than an internal pressure of said downstream cavity.