| 摘要 |
PROBLEM TO BE SOLVED: To provide an unbalance measurement instrument capable of improving the accuracy of unbalance measurement.SOLUTION: In an unbalance measurement instrument 1, a rotor 2 as a test body is put on a vibrating frame 4 and is rotated to detect dynamic unbalance of the rotor 2. The unbalance measurement instrument 1 includes a support roller pair 6 and auxiliary rollers 13, which are provided on the vibrating frame 4, and a control unit 23. The support roller pair 6 has two rollers 60, and the rotor 2 is put on the two rollers 60 and is supported so as to be freely rotatable. The auxiliary rollers 13 are rotatable about revolving shafts 13A provided at prescribed angles (α and &bgr;) in a horizontal direction relative to a rotation axis 2A of the rotor 2. The auxiliary rollers 13 are in contact with the rotor 2 placed on the support roller pair 6 and are rotated in accordance with rotation of the rotor 2. The control unit 23 controls a force with which the auxiliary rollers 13 come into contact with the rotor 2. The auxiliary rollers 13 and the control unit 23 constitute a position controller 8 for controlling the position in a rotation axis direction X of the rotating rotor 2. |
