工作转速对不平衡量测试精度的影响研究

Study on the Accuracy of Unbalance Measurement under Different Working Speeds

对旋转机械而言,其不平衡量控制至关重要,过大的不平衡量会导致一系列振动噪声问题,甚至引起客户抱怨。文章基于美国平衡技术公司(BTI)生产的硬支撑平衡机,对不平衡量的测试原理进行了介绍。应用振动力学相关理论,分析了系统共振对不平衡量测试结果精度和稳定性所产生的不利影响。基于不平衡量测试系统传递函数,提出了避开共振区的风扇工作转速选取原则。

For rotating parts,excessive unbalance leads to series of vibration and noise problems,and even causes customer complaints.Therefore,it is important to control the unbalance of the rotating parts.Based on the hard support balancing machine produced by BTI,the testing principle of unbalance is introduced in this paper.Based on the theory of mechanical vibration,the adverse effects of system resonance on the accuracy and stability of unbalance measurement results are analyzed.According to the transfer function of the unbalance measurement system,the principle of selecting the fan working speed avoiding the resonance region is proposed.