Rotor, rotary machine, method for assembling rotor, and method for disassembling rotor

Abstract

To provide a rotor in which weight at an axial end can be reduced.SOLUTION: A rotor comprise: a shaft having a shaft main body extending in an axial direction and having an axial end part on a first side in an axial direction, and a projection part extending from the axial end part toward the first side; an adaptor flange fixed to the axial end part and extending in the axial direction; and a nut for the adaptor flange. The shaft includes a shaft end face directed toward the first side at the axial end part. The adopter flange comprises: a first flange end face directed toward the first side; a second flange end face directed toward the second side; a through-hole penetrating the first flange end face and the second flange end face in an axial direction; and a counterbore part which recesses from the first flange end face toward the second side in such a way as to increase a diameter of the through-hole and in which a top end of the projection part is arranged. The projection part includes a first screw shaft. The nut is fastened to the first screw shaft, and a circumferential position and radial position of the shaft end face and the second flange end face are bound to each other while both faces come in contact with each other.SELECTED DRAWING: Figure 2

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