汽轮机高调门位移差动传感器故障分析及解决

Trouble Analysis and Solution to the Linear Variable Differential Transformer of High-pressure Regulating Valve in Steam Turbine

汽轮机高压调节阀位线性位移可变差动变压器在应用中故障率很高,通过对公司所属机组的调查,总结出LVDT线圈故障、LVDT铁芯故障、LVDT连接杆故障三大类故障产生的主要原因,研究各机组LVDT的应用情况和改进措施,提出LVDT连接杆规格及防转杆安装方式、双LVDT万向节安装方案、运行报警规则、安装巡检专项方案及减轻高调门汽流激振烈度的一些解决措施。

The fault rate of Linear Variable Differential Transformer of High- pressure regulating valve in steam turbine is very high. By investigating all units in our company, the main reasons related to the LVDT coil fault, LVDT core fault, LVDT connecting rod fault are summarized. The application and improvement measures about LVDT are studied. Some solving measures about LVDT connecting rod specifications, anti rotating rod installation mode, double LVDT joint installation, operation alarm rule, installation and inspection programs, and reduction method of valve steam exciting force vibration intensity are introduced.