旋转机械动静碰摩故障的振动监测研究

Vibration Research of Rub-impact Between Rotor and Stator in Rotating Machine

研究了旋转机械动静碰摩故障下转子与静子振动信号的变化规律。首先分析了碰摩转子和静子振动机理,通过实验对旋转机械在正常情况、轻微局部碰摩和严重局部碰摩三种情况下的动静件振动信号规律和特点进行分析。分析表明,静子振动信号对碰摩故障极为敏感,碰摩时静子振动信号的故障特征表现为调制特征,该特征可以较好地揭示碰摩故障的发生,为诊断碰摩故障提供了一种新思路。

The characteristic of rotor and stator vibration signals under run-impaet status is studied. Firstly,the characteristic and rules of rotor and stator vii）ration signals under rub-impact status are studied. Rotor and stator vibration feature with different rotor speed is analyzed through experiment. Through the analysis of stator vibration characteristic,the pulse force from rub-impact may lead to stator resonance,so it can be brought out to diagnose rub- impact faults. Results reveal that the stato,＂ resonance signals can indicate rub-impact faults. The conclusions can give basis for the vibration character of the stator and the detection of rub-impact signals for the rotor system.