| 摘要 |
<p>A turbine shaft (17) is provided with the following: a shaft (8); a turbine impeller (9) provided to one end side of the shaft; a projecting section (20) provided to either the shaft or the turbine impeller; a press-fit hole (9b) provided to the other out of the shaft and the turbine impeller; an abutting section (20c) that is provided to either an outer peripheral surface (20b) of the projecting section or an inner peripheral surface (18a) of the press-fit hole, projects out in the radial direction of the shaft, and abuts with the other out of the outer peripheral surface of the projecting section or the inner peripheral surface of the press-fit hole; and a joint section (21) at which the shaft and the turbine impeller are joined, the projecting section being press-fitted into the press-fit hole. The site at which the abutting section abuts with the outer peripheral surface of the projecting section or the inner peripheral surface of the press-fit hole is shorter in length in the axial direction of the shaft than a site of opposition between the outer peripheral surface of the projecting section and the inner peripheral surface of the press-fit hole.</p> |
