| 摘要 |
PURPOSE:To easily remove an impeller unit from a rotary shaft, by blocking movement at least a certain value of a tightening unit in its axial direction through a stopper, providing the stopper with the impeller unit as a supporting point and adapting the tightening unit to the stopper. CONSTITUTION:An impeller unit 1 is fitted by the tight fit in a fitted part 4 to a rotary shaft 2, having a screwed part 3, and fixed by a tightening unit 5 screwed to the secrwed part 3. When a rotor built-up unit is disassembled, the tightening unit 5 is loosened, then a head part of the tightening unit 5 axially presses a stopper 6, in accordance with the pressing action, also the impeller unit 1 is pressed out from the fitted part 4 of the rotary shaft 2. In this way, the necessity for using an extraction jig can be eliminated. |
