Patent ID: 9109510
Filing Date: 2015-08-18
Classification: F01D,F02C,F05D

Abstract:
1. A gas turbine comprising: a rotor which rotates around a rotation axis; an exhaust chamber wall which forms a cylindrical shape around the rotation axis; an outer diffuser which forms a cylindrical shape around the rotation axis and is provided along an inner periphery of the exhaust chamber wall; an inner diffuser which forms a cylindrical shape around the rotation axis, is arranged in an inside of the outer diffuser in a radial direction, and forms a combustion gas exhaust air channel between the inner diffuser and the outer diffuser; a bearing housing which is arranged in an inside of the inner diffuser in the radial direction and covers and supports a bearing which rotatably supports the rotor; a plurality of struts which is arranged with intervals in a circumferential direction with respect to the rotation axis between the exhaust chamber wall and the bearing housing, passes through the outer diffuser and the inner diffuser, and connects the exhaust chamber wall and the bearing housing; a strut cover which is arranged along the extending direction of the strut, of which one end in the extending direction is attached to the outer diffuser and the other end is attached to the inner diffuser, and which covers the strut with a space so that cooling air passes between the strut and the strut cover; a partitioning wall which is arranged between the inside of the inner diffuser in the radial direction and the outside of the bearing housing in the radial direction, of which an upstream side portion is sealed between a fixing member which is fixed to the upstream side of the bearing housing and the partitioning wall, of which a downstream side is sealed between the inner diffuser and the partitioning wall, and in which a strut through-hole through which the strut passes is formed; and a hole seal member which is fixed to the strut through-hole of the partitioning wall so as to be relatively movable in the extending direction with respect to the strut, and seals a gap between the strut through-hole and the strut.