| 摘要 |
PROBLEM TO BE SOLVED: To enable the gap between the rotor end face and the casing to be adjusted while assembling the rotor, by providing elastic means which deflects by being pressed when the rotor main body and the rotor shaft are assembled with screw means thereby amplifying the amount of change of the gap relative to the screw torque. SOLUTION: On the right end face of each of the rotor main bodies 43, 45, notches 95 in the axial direction are provided over the entire circumference, and the inside thereof the notches 95 form elastic portions 97, 97. When a rotor shaft 11 of a rotor 7 is rotated to be screwed in the rotor main body 43, the elastic portion 97 of the rotor main body 43 is pressed between step portions of the rotor shaft 11, causing deflection in the elastic portion 97. This deflection gives adequate resistance to the screw-in operation of the rotor 11. Accordingly, the resistance amplifies the amount of change of the gap relative to the screw torque.
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