摘要
某核电厂辅助给水系统(ASG)TWL-45S型汽动泵执行全流量试验时经常发生扬程偏差超标问题,主要原因是汽动泵调速器内部运动部件摩擦力大、卡涩或弹簧刚度变化导致汽动泵启动后调速器的工作点位置不同,进而影响其扬程大小。对调速器运行原理进行研究,并开发了适用于此泵调速器检测的自动化试验台,该试验台由高压、低压液压系统组成,对调速器上、下缸腔室进行充压,可实现其内部运动部件摩擦力测量、弹簧刚度测量及密封件泄漏率检测,提高了调速器的检修质量及设备的可靠性。
During the full-flow test of the TWL-45S auxiliary feedwater system(ASG)turbine-driven pump at certain nuclear power plant,an issue of excessive deviation in head was frequently encountered.The main reason for this problem was the high frictional force,sticking or change in spring stiffness of the internal moving components of the steam-driven pump speed regulator,leading to different working positions of the speed governor after the pump started,thereby affecting its head.A study on the operation principle of the speed governor was conducted,and an automated test bench suitable for testing this pump s speed governor was developed.This test bench consists of high-pressure and low-pressure hydraulic systems,capable of pressurizing the upper and lower cylinder chambers of the speed governor,enabling measurement of the frictional force of its internal moving components,measurement of spring stiffness,and detection of seal leakage.Therefore,the quality of maintenance of the speed governor and the reliability of the equipment were improved.
作者
邢兴龙
XING Xinglong(China Nuclear Power Operations Co.,Ltd.,Shenzhen,Guangdong Prov.518000,China)
出处
《中国核电》
2024年第4期515-519,共5页
China Nuclear Power
关键词
离心泵
调速器
试验台
扬程偏差
性能计算
摩擦力测量
centrifugal pump
governor
test bench
head deviation
performance calculation
measurement of spring stiffness
