某M701F型燃气轮机停机过程1X振动高原因分析

Cause Analysis of High 1X Vibration During Shutdown of a Certain M701F Gas Turbine

文章介绍了某单轴燃气-蒸汽联合循环机组1号轴瓦X方向振动高异常情况,通过分析对比启停数据,得出1瓦X方向振动高反应的是实际工况,开缸检查后发现T4(透平四级)叶环上半T4S(透平四级动叶)的密封臂全周有磨损减肉现象,提出了对应的解决措施,以期为同类型电厂提供借鉴。

The article introduces the abnormal situation of high vibration in the X direction of the No.1 bearing bush of a single-shaft gas-steam combined cycle unit.By analyzing and comparing the start-stop data,it is concluded that the high vibration of 1 watt in the X direction is the actual working condition.It was found that the upper half of the T4S(turbine four-stage rotor blade)sealing arm of the T4(turbine four-stage)blade ring was worn and reduced all around,and corresponding solutions were proposed to provide reference for the same type of power plants.