BALANCING DEVICE FOR ROTATING BODY, FOR PREVENTING ROTATION ECCENTRICITY OF ROTATING BODY ROTATING AT SPEED UNDER CRITICAL SPEED DUE TO UNEVEN COMPOSITION OF MATERIAL AND IMBALANCED SHAPE OF ROTATING BODY

摘要

PURPOSE: A balancing device for a rotating body is provided to improve the sensitivity for unbalancing and to prevent the defective lubrication of balls by composing the balls placed in the groove of different materials. CONSTITUTION: A balancing device is placed on a turntable. Many balls(60,100) are in a groove(50) formed along the circumference of the turntable. The balls placed serially are made of different materials to prevent the degradation of lubrication efficiency. The first balls are made of beryllium copper alloy or bronze, while the second balls are made of chrome steel or stainless steel. The first balls and the second balls are placed alternately.