TURBINE ROTOR

To provide a turbine rotor in which separate structures can share an axial power transmission function at a fastening part of a rotor component and a sealing function of a passage of a cooling medium, and which has a bolt fastening part having high reliability.SOLUTION: A turbine rotor 10 of the embodiment is configured to bring a contact end face 43 of a rotor component 40 into contact with a contact end face 54 of a rotor component 50, and bond the rotor component 40 and the rotor component 50 by bolt fastening. The turbine rotor 10 includes: a cylindrical recessed part 64 formed on the contact end face 43 and recessed in an axial direction; an axial passage 62 drilled in an axial direction from a bottom surface 64a of the cylindrical recessed part 64 and through which a cooling medium flows; an introduction passage 61 for introducing the cooling medium to the axial passage 62; a discharge passage 63 penetrating on an outer peripheral surface 40a of the rotor component 40 from the axial passage 62 and discharging the cooling medium; and a sealing member 65 provided to the cylindrical recessed part 64 and sealing one end of the axial passage 62.SELECTED DRAWING: Figure 1 【課題】ロータ構成部材の締結部における軸動力伝達機能と冷却媒体の通路のシール機能とを別個の構造体で分担することができ、高い信頼性を有するボルト締結部を備えるタービンロータを提供する。【解決手段】実施形態のタービンロータ１０は、ロータ構成部材４０の当接端面４３とロータ構成部材５０の当接端面５４とを当接させて、ロータ構成部材４０とロータ構成部材５０をボルト締結によって接合して構成される。タービンロータ１０は、当接端面４３に形成され、軸方向に凹む筒状凹部６４と、筒状凹部６４の底面６４ａから軸方向に穿孔され、冷却媒体を流す軸方向通路６２と、軸方向通路６２に冷却媒体を導入する導入通路６１と、軸方向通路６２からロータ構成部材４０の外周面４０ａに貫通し、冷却媒体を排出する排出通路６３と、筒状凹部６４に配置され、軸方向通路６２の一端を封鎖する封鎖部材６５とを備える。【選択図】図１