Patent ID: 8043062

Claim:
A turbine rotor which is provided with a torque transfer mechanisms equipped between a pair of adjacent first and second rotor discs among a plurality of rotor discs stacked in the axial line direction, with the centers in alignment with each other, and assembled in a single unit, for transferring a torque from the first rotor disc to the second rotor disc, the turbine rotor comprising: a first contact face which is formed on the first rotor disc so as to face the second rotor disc; a plurality of first grooves arranged on the first contact face, respectively separated from each other along the circumferential direction of the first rotor disc, respectively formed in the radial direction of the first rotor disc, and having a semi-circular cross section in orthogonal direction to the radial direction of the first rotor disc; a second contact face which is formed on the second rotor disc so as to face the first rotor disc; a plurality of second grooves which are arranged on the second contact face so as to be separated from each other along the circumferential direction of the second rotor disc, respectively formed in the radial direction of the second rotor disc, and having a semi-circular cross section in orthogonal direction to the radial direction of the second rotor disc; a plurality of torque pins, each of which are inserted into each of a plurality of cylindrical holes formed between a pair of one of the first grooves which is in contact with the other one of the second grooves when the first rotor disc is arranged adjacent to the second rotor disc; and a binary flange receiving plane, composed of outer circumferences of the adjacent first and second rotor discs along the circumferential direction, wherein each of a plurality of the torque pins is provided with a columnar main body and a flange having a long side and a short side attached on the main body, the length of the long side of the flange is greater than the length of the binary flange receiving plane, the length of the short side of the flange is smaller than the width of the binary flange receiving plane, and a flange receiving recessed portion for receiving an end portion of a long side of the flange are formed respectively on two side faces of the pair of rotor discs.