Automatic Balancer : Pendulum Balancer

Abstract

This paper is concerned with theoretical and experimental investigations on the dynamic behavior and the stability of an automatic balancer using centrifugal pendulums. It is found that the unbalance of the rotor can be completely corrected only when the pivots of the pendulums are at the center of the shaft. A violent self-excited vibration can occur when the speed of the shaft is nearly equal to the sum of the critical speed of the rotor and the natural frequency of the pendulum. To verify the theoretical results experiments are carried out.