Patent ID: 9206705
Filing Date: 2015-12-08
Classification: F01D

Abstract:
1. A sealing device which seals between an outside space between an outer side in the radial direction of an external diffuser which has a tubular shape and forms an exhaust channel through which combustion gas rotating a rotor of a gas turbine passes in the inner side in the radial direction and an outside member which is disposed outside the external diffuser with an interval between them in the radial direction, and the exhaust channel by an end of the external diffuser, the sealing device comprising: a first seal plate group and a second seal plate group which include a plurality of seal plates, wherein the plurality of seal plates, which extend to the outer side in the radial direction from the end of the tubular external diffuser and reach the outside member, are laminated in contact with each other; and a spacer is sandwiched between the first seal plate group and the second seal plate group, and maintains an interval between the first seal plate group and the second seal plate group in an axial direction in which a rotational axis of the rotor extends, wherein the spacer includes an outside spacer which maintains an interval between an outer side portion in the radial direction of the first seal plate group and an outer side portion in the radial direction of the second seal plate group, and an inside spacer which maintains an interval between an inner side portion in the radial direction of the first seal plate group and an inner side portion in the radial direction of the second seal plate group, and wherein a seal air hole which penetrates from the outer side in the radial direction toward the inner side in the radial direction is formed in the outside spacer.