柔性弯曲转子的特征识别与诊断

摘要

依据转子动力学理论分析了柔性转子弯曲响应的特征，在此基础上讨论了它与不平衡响应及机械与电气跳动量之间的关系，并利用转子在不同起车情况下的振动信息，有效地分离了弯曲响应和不平衡响应，求解出弯曲量与不平衡量的比值.提出了转子在恒定转速下，基于二维全息谱技术的热弯曲故障识别方法.研究结果表明，当弯曲量相位稳定而其幅值变化时，转子响应的二维全息谱初相点的切线是相互平行的，由此可以有效地实现转子热弯曲故障的识别与诊断.%The responses of shaft bow and their relationships with unbalanceresponses and mechanical or electronic run out are analyzed based on the theory of rotor dynamics.The responses of shaft bow are separated from the unbalance responses successfully by making use of vibration information under different rotor runs.An identification method of thermal bend is presented based on the 2D-holospectrum technique.Experimental results show that when bow phase is steady and amplitude is variable,the tangent of initial phase point on the 2D-holospectrum is parallel,which can be effectively used for diagnosis of bent shaft.