Abstract: A gas turbine is provided that can suppress an increase in the supplied amount of cooling air in clearance adjustment through casing cooling. The gas turbine 101 includes a turbine casing 19 enclosing a turbine shaft 105, the turbine casing 19 including a cooling air header 21 and a cooling passage 24; and an exhaust diffuser 113 connected to the exhaust side of the casing 19, the exhaust diffuser 113 including an exhaust diffuser cooling passage 26. A plate 22 formed with a plurality of impingement cooling holes 28 is installed inside the cooling air header, and a route is formed which allows cooling air introduced from the impingement cooling holes to flow from the casing cooling passage to the diffuser cooling passage.

Abstract: An axial-flow compressor with variable stator vanes located at a single stage can be modified by adding variable stator vanes to the axial-flow compressor so that the variable stator vanes are located at a plurality of stages. The axial-flow compressor includes stator vane rows located at the plurality of stages and include the variable stator vanes extending in a radial direction of the axial-flow compressor and rotating around rotary shafts of the variable stator vanes so as to adjust angles of the variable stator vanes; a plurality of rings are connected to the stator vane rows and drive and rotate the variable stator vanes of the stator vane rows that correspond to respective rings; a plurality of levers that correspond to the plurality of rings; a rotary shaft that holds the plurality of levers so as to enable the levers to pivot.

Abstract: It is an object of the present invention to provide a compressor that has a simple structure, produces a damping effect and improves aerodynamic performance. In a compressor including stator blades 4 circumferentially mounted to an inner circumferential surface side of a casing 6 forming a annular path; and an inner barrel 7 supported by the casing and arranged on the radially inside of the stator blade as a partition wall on the radial side of the annular path; the stator blade includes an outer shroud 10 mounted to an inner circumferential surface of the casing at a position facing the inner barrel, and an inner shroud 11 supporting a blade portion at an inner diameter side, the inner shroud being disposed in an annular groove formed in an outer circumferential surface of the inner barrel facing the inner shroud. The stator blade including the outer shroud 10, the inner shroud 11 and the blade portions 9 are formed in a monolithic structure by milling.