1000MW机组振动特性及案例分析

Analysis and Case Study on Vibration Characteristics of 1 000-MW Units

针对上海电气集团生产的1 000 MW汽轮发电机组普遍存在的高压转子振动波动、中压转子轴承座振动跳变、低压转子不稳定振动、发电机转子热不平衡和励端小轴异常振动问题,通过案例分析振动的特征及产生机理,并据此给出振动处理对策,为其他该类型机组的振动故障诊断及处理提供参考。

Aiming at the vibration problems existing generally in the 1 000-MW turbo-generator units manufactured by Shanghai Electric Group,such as the fluctuation of high-pressure rotor vibration,the jump of bearing vibration at the middle-pressure rotor,the unstable vibration of the low-pressure rotor,the thermo-unbalance of generator rotor and the abnormal vibration of the exciter shaft,the analysis on the characteristics and mechanisms of the vibrations is conducted respectively.Based on the analysis results,countermeasures against these problems are proposed,which will be helpful to diagnose and troubleshoot the unit vibration issues of the similar type.