节流孔在汽轮机调节保安系统中的作用及故障分析  

The Function of Orifice in Turbine Governing &Protecting System and its Fault Analysis

作　　者：马勇[1,2] 朱立彤[2] 付昶[2] 吴涛[2] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安热工研究院有限公司,西安710032

出　　处：《发电设备》2012年第5期328-330,342,共4页Power Equipment

摘　　要：以国内某135MW机组汽轮机调节保安系统为例,介绍了调节保安系统中控制节流孔、安全节流孔和试验节流孔的作用,指出了常见的几种由于节流孔引起的调节保安系统故障,包括调速油压建立不起来、高压调节阀门在机组正常运行中突然关闭、机组挂不上闸、阀门活动试验时汽门关闭和给水泵汽轮机调门频繁开关等,安装调试中应特别注意节流孔的正确性。Taking the governing ＆ protecting system of a domestic 135 MW turbine as an example, the functions of control orifice, safety orifice and experiment orifice in the system are described. Some common faults in the turbine governing ＆ protecting system caused by orifice are introduced, including the low EH oil pressure, sudden shut off of HP governing valve in normal operation, abnormal latching of turbine unit, sudden shut off of the valve during testing period and frequent switching of feed pump turbine＇s governing valve. So, great attention shall be paid to the correctness of the orifice installation ＆ commissioning.

关 键 词：汽轮机 调节保安系统 节流孔 故障 

分 类 号：TK263.72[动力工程及工程热物理—动力机械及工程] TK264.2