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

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.