Patent ID: 8079802

Claim:
A gas turbine comprising: a shaft directional passage provided to a rotating member that rotates along a central axis of a rotor, which is a rotating axis of the rotating member, about the central axis, or a rotating axis of the rotating member, and in which cooling air flows along a direction of the rotating axis of the rotor; a plurality of radial directional passages provided in a circumferential direction of the rotating member, and compressing the cooling air by being provided outwardly from center of the rotor, wherein one end of each of the radial directional passages is communicated with the shaft directional passage and the other end is communicated with exterior of the rotating member; and an external passage including an air amount regulating unit, wherein one end thereof is communicated with an air supply for taking air in and the other end is communicated with the radial directional passages to introduce the cooling air.