| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor of turbomachinery having an improved fatigue strength and product life. <P>SOLUTION: There is adopted a rotor 100 of a turbocompressor 1 including: an impeller 11 that is installed at an end part 6a of a rotating shaft 6 and has a first linear expansion coefficient in the axial direction; a tension bolt 13 that fastens the impeller 11 to the end part 6a of the rotating shaft 6 in the axial direction and has a second linear expansion coefficient higher than the first linear expansion coefficient in the axial direction; and a thermal expansion member 14 that is fastened to the end part 6a of the rotating shaft 6 in the axial direction together with the impeller 11 by the tension bolt 13 and has contact end faces 14a at both sides in the axial direction which are perpendicular to the axial direction and a third linear expansion coefficient higher than the second linear expansion coefficient. <P>COPYRIGHT: (C)2013,JPO&INPIT |
