某型热电联产机组运行中发生了多测点振动“突增”现象,造成了振动保护动作而跳闸。分析了现场振动数据以及相关运行参数,首先排除了突发性振动是非干扰信号,在缺少振动相位、频率等信息的条件下,从时间响应、振动大小、振动变化和轴向位置等多方面综合分析,进一步判断为汽轮机中压缸内叶片脱落。处理措施是叶片修复和高速动平衡,运行后振动状况良好。 A certain type of combined heat and power unit running occurred in the multi-measuring point vibration “sudden increase ” phenomenon, resulting in vibration protection action and trip. After analyzing the on-site vibration data and related operating parameters, we first exclude that sudden vibration is a non-interfering signal. Under the condition of lack of information about vibration phase, frequency and so on, we can synthesize from the aspects of time response, vibration magnitude, vibration variation and axial position Analysis, to further determine the steam turbine pressure cylinder vane off. Treatment is the blade repair and high-speed dynamic balance, vibration after operation in good condition.