弹性阻尼支撑抑制不对中转子振动试验研究

Experimental study on vibration control of misaligned rotors with elastic damping support

针对旋转机械运行过程发生不对中时振动较大的问题,设计了一种弹性阻尼支撑结构,探究了弹性阻尼支撑结构对单跨不对中故障转子振动的抑制效果。通过建立转子不对中力学模型,分析了不对中故障转子产生二倍频振动机理,并用有限元软件仿真计算了弹性阻尼支撑对故障转子振动的抑制作用,在此基础上搭建了单跨双支撑转子试验台,垫高轴承座模拟转子不对中故障,通过试验研究了单个弹性阻尼支撑对不对中转子振动的控制效果。研究结果表明:单跨转子系统发生不对中故障时,单个弹性阻尼支撑可以有效降低其一倍频和二倍频振动幅值,二倍频振动降幅高达93%,减振效果非常明显。

Aiming at the problem of large vibration during the misalignment of rotating machinery operation, an elastic damping support structure was independently designed to investigate the effect of the elastic damping support structure on the vibration of single-span misalignment rotor. The mechanism of the double-frequency vibration of misaligned rotors was analyzed by establishing the single-rotor misalignment mechanics model, and the damping effect of the elastic-damping supports on the rotors of the faults was simulated by finite element software. A single-span double-support rotor test was built on this basis. The simulation of the misalignment of the rotor by the bearing seats of the raised seats was carried out to study the control effect of a single elastic damping support on the vibration of the misaligned rotor. The research results show that a single elastic damping support can effectively reduce its one-time frequency and second-frequency vibration amplitude when a single-span rotor system is misaligned. The double-frequency vibration reduction is reduced by 93%, and the vibration reduction effect is very obvious.