压缩机组不对中故障动力学特性分析

his paper whose research object is a compressor unit, using ANSYS finite element software, deduced the expression of the vibration force which is based on coupler deformation geometric relations and stress analysis. The dynamic model of coupling angle misalignment fault which is based on equivalent shaft section method was derived. Radial vibration responses of the low pressure rotor were simulated when rotor system has varying degrees of fault. The research showed that with the increase of the misalignment, the rotor vibration increased, the misalignment fault became more evident, and the ratio of the multiple frequencies increased, the shaft center orbit presents a "banana" shape or "8" shape. The result provides theoretical bases for the misalignment fault of the coupler.