| 摘要 |
PROBLEM TO BE SOLVED: To provide a casing fixing structure that can suppress progress of opening by improving rigidity of a flange fastening part of a casing and effectively suppressing a rise in temperature of a bolt, and to provide a casing structure, and a gas turbine.SOLUTION: In a casing fixing structure having a flange of a turbine casing fastened with a bolt and a nut, the flange is held in a bracket type fixing member 21 having a bolt hole 26 formed, and fastened with the bolt and nut via the bracket type fixing member. The bracket type fixing member is provided with an isolation wall 21c covering the periphery of the bolt to isolate the bolt from the flange, and a cooling hole 28 supplying a cooling refrigerant 29 to a space between the bolt and isolation wall. |
