一种简便的现场动平衡新方法

A Simple and New Method of Field Balancing

现场动平衡是解决旋转机械不平衡故障最方便有效的方法。针对当前工程实际中正在使用的动平衡方法的不足,从Jeffcott转子不平衡响应这一角度出发,结合影响系数法原理,提出一种无需相位信息的动平衡新方法。该方法无需安装键相传感器,通过两次特殊位置的试重,即可计算出配重大小及两个可能的配重位置。应用该方法进行现场动平衡,最少停机3次,最多停机4次,即可完成现场动平衡。为了验证该方法,在Bently转子实验台上进行了3组动平衡实验,把该方法与影响系数法的结果进行了对比。实验结果表明,与影响系数法相比,该方法对试重的要求不敏感,即使试重对不平衡响应的影响很小,也能获得较理想的结果。文中所提方法对工程现场动平衡技术的应用具有重要促进作用,能够显著提高工程实际中机组的不平衡故障处理效率,具有显著的工程应用价值。

On-site dynamic balancing is the most convenient and effective method to solve unbalanced problems of rotating machinery.Aiming at the deficiency of dynamic balancing method which is currently used in engineering practice,this paper proposes a new method of dynamic balancing without phase information from the view of Jeffcott rotor unbalance response and combined with the principle of influence coefficient method.This method does not need to install the key phase sensor,through two special position of the trial weight,we can calculate the size of the weight and two possible weight position.When applying this method to carry out on-site balancing,the machine can be shut down three or four times to complete on-site balancing.In order to validate this method,three dynamic balancing experiments are carried out on a Bently Rotor bench,and the results are compared with the results of the influence coefficient method.The experimental results show that the proposed method is insensitive to the test weight requirements compared with the influence coefficient method.Even if the test weight has little effect on the unbalance response,the ideal result can be obtained.The method proposed in this paper has an important role in promoting the application of dynamic balancing technology in construction sites,and can significantly improve the efficiency of unit imbalance fault handling in engineering practice,which has significant engineering application value.