660MW机组主蒸汽管道支吊架吊杆偏斜异常分析及处理  

Thermal Displacement Analysis of Main Steam Pipe and Inspection Adjustment of Support Hanger for 660MW Unit

作　　者：刘奇 刘明 黎大川 LIU Qi;LIU Ming;LI Dachuang(Hubei Huadian Jiangling Power Generation Co.,Ltd.,Jingzhou 434000,China;Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou 310030,China)

机构地区：[1]湖北华电江陵发电有限公司,湖北荆州434000 [2]华电电力科学研究院有限公司,杭州310030

出　　处：《内蒙古电力技术》2018年第5期72-75,共4页Inner Mongolia Electric Power

摘　　要：某660 MW新建机组投运后,主蒸汽管道支吊架吊杆出现偏斜度超标问题,通过现场吊架检验及热位移记录分析,明确了限位装置预留间隙是导致吊杆发生偏斜的主要原因,管道应力计算结果表明,该缺陷会对炉左过热器集箱出口的端口推力和推力矩产生不利影响。通过采取重新设置偏装以及调整支吊架安装间隙等措施,全部支吊架恢复正常工作状态。In view of the defects of the large deflection of the hanger rod of the mainsteam pipe of a new 660 MW new set and the defects of some other supporting hangers,the main cause of the abnormal thermal displacement fault is clear by the inspection ofthe site installation state and the record of the thermal displacement, and the fault to theleft of the furnace is clearly defined through the calculation of the stress of the pipe. Theport thrust/thrust moment of the outlet of the superheater is adversely affected, and finallythe normal working state of all the hangers is restored through a comprehensive andmeticulous supporting frame.

关 键 词：主蒸汽管道 热胀位移 限位装置 支吊架 推力 推力矩 

分 类 号：TM621.72[电气工程—电力系统及自动化]