基于ODS方法的转子故障分析

Rotor Fault Analysis Based on Operating Deflection Shapes Technology

转子系统在旋转机械中起着关键作用,一旦发生故障,将造成重大经济损失。因此,开展旋转机械转子故障诊断方法的研究具有重要工程意义。目前一般是基于传统傅里叶变换的频谱分析方法诊断转子故障。这种方法不能判断转子进动方向,容易误判机组发生故障原因。基于上述问题,研究运行变形振型(ODS)方法,并将其应用于转子故障实验中。用不同参数的变化来反应转子在不同工况下的ODS改变量,以此来判断转子发生哪一种故障以及故障的严重程度。最后运用仿真数据及实验结果验证了这种方法的正确性和有效性。

Because the rotor system plays an important part in rotating mechanism,if the fault happens,it causes enormoes losses.For this,this paper makes a study of its fault diagnostic method. At present,the classical spectral analysis method is commonly used to diagnose the rotor faults,but this method is unable to find out the correlation between the X and Y motions and accurately judge the failure classes. Due to the problem above,it studies the theory of operating deflection shapes technology. And it is applied to the rotor failure experiment. The change of the different parameters reflects the change of the ODS under different working conditions.This can be used to judge the failure classes and degree. And then,the effectiveness of the method is proved by the data obtained by the simulation and the experiment.