平衡目标选择与全息动平衡法的改进研究

A Study on the Improvement of Balancing Target Selection and Holographic Dynamic Balancing Method

讨论了全息动平衡法中作为平衡目标的工频轨迹初相矢在描述转子平衡状态上所存在的问题。通过对转子工频轨迹的进动分解,详细分析了转子失衡量对正、反进动分量的不同影响。结果表明:反进动分量并非转子平衡状态的直接反映。在大偏心率轨迹的情况下反进动分量给失衡量估计带来的干扰不可忽略。在此基础上,提出了一种以转子正进动分量轨迹初相矢为平衡目标的改进全息动平衡方法。在不影响原全息动平衡法平衡精度的条件下,简化了配重方案计算过程,相比传统平衡方法而言更为准确和高效。现场应用实例验证了本方法的可靠性与有效性。

Discussed were the problems existing during the description of the balancing state of a rotor by using a working-frequency trajectory initial-phase vector,which serves as a balancing target in a holographic dynamic-balancing method. Through a precession decomposition of the working-frequency trajectory of the rotor,the different influences of the unbalanced mass of the rotor on its positive and reverse precession component were analyzed in detail. It has been shown that the reverse precession component is not a direct reflection of the balancing state of the rotor. Under the condition of a trajectory with a large eccentricity,the interference on the estimation of the unbalanced mass caused by the reverse precession component should not be neglected. On this basis,presented was an improved holographic dynamic-balancing method with the positive-precession component trajectory initial-phase vector of the rotor serving as a balancing target. Under the condition of not influencing the balancing accuracy of the original holographic dynamic-balancing method,the counterweight version calculation process has been simplified. Compared with the traditional balancing methods,the method under discussion is more accurate and effective. On-site practical applications have verified the reliability and validity of the method.