BALANCING DEVICE FOR ROTATING BODY

PROBLEM TO BE SOLVED: To adjust the balance of a rotating body without stopping the body by rotating or moving to and from a plurality of balancing weights attached to an axial center member of the rotating body in such a manner as to, from the outside of the rotating body, be rotated or moved to and from in the radial direction of the rotating body. SOLUTION: When an umbalance happens on a rotating body 1, if an pinion 8 is rotated without stopping the rotating body 1, a member 7 moving in an axial direction and engaging with the pinion 8 is moved to move an axial central member 5 in an axial direction via a roller bearing 6. The axial center member 5 is supported at several points by positioning members 3 in a radial direction and the amount of displacement is converted to the amount of revolution of an eccentric disk 4 by a screw in the eccentric disk 4. Threads of different lead angles according to two eccentric disks 4 are cut on the axial center member 5 and the eccentric disks 4 are rotated in a peripheral direction at different speed. The eccentric disks 4 are positioned by a positioning member 2 in an axial direction and a spacer 10. The balance of the rotating body is adjusted by the above described constitution without stopping it.