机构平衡的可移动配重法  

A Movable-Counterweights Method for Balancing of Mechanisms

作　　者：张英[1] 姚燕安[1] 查建中[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《上海交通大学学报》2006年第12期2039-2045,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(50335040);国家自然科学基金重点(50405004)资助项目;北京交通大学"十五"科技专项基金(JXJ05009)

摘　　要：基于配重法的平衡原理,提出一种具有可移动配重的机构动力平衡新方法.该方法所加配重与附加在待平衡机构上的RRP杆组的滑块相固结,配重可以随机构转动的同时沿其导路作往复移动,通过对附加杆组的几何参数和配重的优化设计,使机构的单项或多项动力指标得到改善.以曲柄摇杆机构为待平衡机构,提出了可移动配重的实现方案,建立了以输入转矩、震动力和震动力矩为平衡目标的综合优化模型,对可移动配重方法和传统固定配重方法的平衡效果进行了比较.结果表明,可移动配重方法在降低机构的震动力和输入转矩方面是有效的.Based on the traditional counterweights method, a novel movable counterweights method for dynamic balancing of mechanisms was presented. The counterweights added with the proposed method are not stationary to the links on which they are placed but free to slip along them. Fixed to the slider block of an RRP dyad attached to the original unbalanced mechanism, each of the counterweights has a complex motion which is a simultaneous combination of translation along its axis of sliding and rotation accompan- ying with the linkages. One or more of dynamic factors are expected to be improved by selecting the additional mechanism and the counterweights properly. Taking a crank-rocker mechanism as an example, several schemes for moving the counterweight were discussed, and an optimization model with the object of collectively minimizing input torques, shaking forces and shaking moments was developed. The balancing effects of the proposed movable counterweights method and the traditional fixed counterweights method were compared. The numerical results verify the effectiveness of the proposed method in balancing of shaking forces and input torques.

关 键 词：机构平衡 配重法 输入转矩 震动力 震动力矩 

分 类 号：TH112[机械工程—机械设计及理论]