| 摘要 |
A turbine rotor is provided with a torque transfer mechanism equipped between a pair of adjacent rotor discs among a plurality of rotor discs so as to transfer a torque from one rotor disc to another rotor disc. The torque transfer mechanism is provided with a first groove having a semi-circle in cross section formed on a first contact face of one rotor disc, and a second groove having a semi-circle cross section formed on a second contact face of another rotor disc, and a torque pin inserted into cylindrical holes formed by combining the first grooves and the second grooves. The flange of the torque pin has long sides and short sides, and the length of the short sides is shorter than the width of an binary flange receiving plane formed by a pair of outer circumference planes of adjacent two rotor disc along the circumferential direction, and the long side of the flange has a longer length than the width of the binary flange receiving plane. A pair of flange receiving recessed portions is provided for receiving the end portions of the long sides of the flange on both side walls of the binary flange receiving plane.
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