关键词: 振动与波, 自动平衡装置, 减振效益

Abstract: The background of automatic balancer study is introduced. The working principles, the characteristics of balancing, and the benefit of vibration reduction of three types of automatic balancers, the rollingball type balancer, the hammer type balancer and the liquid type balancer, are studied. It is suggested that the multiple of the vibration reduction be adopted as a quantitative index for the benefit evaluation. Comparative analysis shows that the rollingball type balancer has the best benefit of vibration reduction among the three types of balancers. In an ideal situation，the rotor can be brought to a complete balance state and the multiple of vibration reduction can reach infinity. While for hammer type balancer, the multiple of vibration reduction is much larger than unity in the ideal situation. Comparatively, the vibration reduction benefit is poor for liquid type balancer. Its multiple of vibration reduction is between 1 and 2.

Key words: vibration and wave, automatic balancer, vibration reduction benefit