| 摘要 |
PURPOSE:To enable stable rotation to be carried out in a wide speed range without a resonance point, by forming two bearings, namely, a fixed bearing and a movable bearing, as one side bearings, and by changing the supporting point of the bearing moving the movable bearing according to the resonant rotational frequency of a motor. CONSTITUTION:On a motor connected to a load 12 via a coupling 11, two bearings 13, 14 are arranged to be formed on the load side or the counter load side. The bearing 14 on the shaft end side among the two bearings 13, 14 is fixed, and the inner bearing 13 is set in a movable state in the supporting direc tion. Then, a rotary shaft 2 is supported by the fixed bearing 14 and a bearing 6 on the opposite side, and a rotor 1 is rotated, and when it is detected that the rotational frequency of the rotor 1 is in a range of the resonant rotational frequency at the fixed bearing 14, then the movable bearing 13 is moved in the supporting direction, and the rotary shaft 2 is arranged to be supported by the movable bearing 13 and the bearing 6 on the opposite side. |
