核电厂汽轮机差胀探测器摩擦转子问题分析与处理  

Analysis and Solutions for Friction Problem between Turbine Differential Expansion Detector and Rotor at a Nuclear Power Plant

作　　者：郑军伟 汪彦 赵书宇 赵东阳 ZHENG Jun-wei;WANG Yan;ZHAO Shu-yu;ZHAO Dong-yang(China Nuclear Power Engineering Co.,Ltd.,Shenzhen,Guangdong Prov.518124,China)

机构地区：[1]中广核工程有限公司

出　　处：《中国核电》2019年第6期627-630,共4页China Nuclear Power

摘　　要：为解决某核电厂汽轮机DP243型钟摆式差胀探测器磁性拖板(MPT)与HIP转子测量凸台(MBS)之间发生的摩擦问题。使用MBS直径方向热膨胀量叠加转子顶轴高度的方法计算MPT与MBS间隙的变化量(G)。基于G的计算结果绘制了G随MBS平均温度(T)的变化趋势曲线。根据汽轮机参数计算出DP243探测器在HN1119-6.43/280/269-H型汽轮机上的最小安全安装间隙(Csmin)为1.29mm。分析得出DP243探测器首次安装间隙(C0)小于Csmin是导致该摩擦问题的根本原因。DP243探测器的最大允许安装间隙(Camax)大于Csmin,优化后安装间隙为Ci,按照Csmin≤Ci≤Camax重新安装、调试探测器后解决了该摩擦问题。In order to solve the friction problem occurred between the magnetic pallet(MPT)of DP243 type pendulum differential expansion detector and the HIP rotor measuring boss(MBS).The gap variation(G)between MPT and MBS was calculated by a method that added up the diameter direction thermal expansion value of MBS and the HIP rotor jacking height.The trend curve of G changing with the average temperature(T)of MBS was drawn based on the calculation result of G.The minimum safety installation clearance(Csmin)of DP243 detector at HN1119-6.43/280/269-H turbine was calculated according to the turbine parameters,and the result was 1.29 mm.The root cause of this friction problem was the initial installation clearance(C0)of DP243 detector less than its Csmin that was drawn through analysis.The optimized measurement method of the installation clearance(Ci)was provided through a schematic diagram in this paper.The maximum allowable installation clearance of DP243 detector(Camax)is more than Csmin,the friction problem was solved by re-installed and commissioning the detector with Csmin≤Ci≤Camax.

关 键 词：核电厂 汽轮机 转子 差胀探测器 安装间隙 摩擦 

分 类 号：TM623[电气工程—电力系统及自动化]