1000 MW二次再热超超临界汽轮机组摩擦故障分析与处理

国电泰州电厂3号机组为1000 MW二次再热超超临界机组,机组调试期间超高压转子、高压转子和低压转子发生不稳定振动,振动不断爬升,严重影响机组的安全稳定运行。通过对振动数据的分析,指出摩擦故障是导致超高压转子、高压转子和低压转子不稳定振动的根本原因,现场分析故障原因,改变机组启动方式,并采取现场动平衡处理,处理后摩擦故障消除,机组稳定运行。

Fault Diagnosis for a Rub Vibration Problem Occurred in a 1000 MW Ultra-supercritical Steam Turbine Unit with Double Reheat Cycles

Unsteady vibration occurred in the Ultra high-pressure rotor,high-pressure rotor and low-pressure rotor for a 1000MW ultra-supercritical turbine generator unit of Taizhou power plant during the debugging process seriously affects the safety and stable operation of the unit.On the base of the detailed vibration analysis,we found that rotor-to-stator rub is the main cause of the unsteady vibration of the three rotors.The field dynamic balancing experiment was proceeded,and the starting method of the unit was changed.The unsteady vibration problem was solved.