| 摘要 |
PROBLEM TO BE SOLVED: To provide a shrinkage fitting fastening structure for a gas turbine capable of certainly preventing occurrence of relaxing of the shrinkage fitting fastening structure between a cylindrical fitting fastening part formed on a cylindrical support member at a shaft side of the gas turbine and a cylindrical shrinkage fitting fastening part formed on at least a turbine disk of the gas turbine. SOLUTION: In the shrinkage fitting fastening structure, when a rear shaft 11 and the turbine disk 7 at a latter stage are rotated with the shaft 1 at a high speed, the rear shaft 11 having smaller rigidity in a centrifugal direction than the cylindrical shrinkage fitting fastening part 7 of the turbine disk 7 at the latter stage is relatively largely deflected in the centrifugal direction relative to the shrinkage fitting fastening part 7B arranged at an outer peripheral side of the shrinkage fitting fastening structure. Therefore, an outer peripheral fitting surface 11B of a fitting fastening part 11A at an inner peripheral side of the shrinkage fitting fastening structure is pressed to an inner peripheral fitting surface 7B1 of the shrinkage fitting fastening part 7B at an outer peripheral side, and occurrence of relaxing of the shrinkage fitting fastening structure is certainly prevented. COPYRIGHT: (C)2008,JPO&INPIT
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