某600 MW超临界机组1号瓦振动异常分析与处理

某600 MW超临界机组在460 MW负荷左右进行单阀运行模式切顺序阀运行模式时,1号瓦轴振偏大,顺序阀运行模式无法正常投入,影响机组的经济性。通过采集现场数据,从引起振动异常的机理出发,准确分析了故障原因;通过采取调整轴系标高等手段,消除了该机组1号瓦振动异常的故障,对大型机组类似振动故障分析及处理具有借鉴价值。

Analysis and Treatment of Bearing 1 Vibration Fault in a 600-MW Steam Turbine

Due to the excessive shaft vibration on Bearing 1 of a 600-MW supercritical unit when it is switched from single valve to sequential valve operation mode at around 460 MW load level, the sequential valve mode cannot be normally committed, which has great impact on the economic performance of the unit. By virtue of field data collection and analysis, the cause of the abnormal vibration is analyzed precisely in the aspect of vibration mechanism. Through shafting level adjustment, the abnormal vibration of Bearing 1 is successfully eliminated. This case is useful for analyzing similar vibration fault in supercritical power plants.