小汽轮机管道变形原因的有限元分析  

Disclosing the Cause of a BFPT Exhaust Pipe's Deformation by Means of Finite Element Analysis

作　　者：孙义冈 阎占良[2] 姜丽涛 

机构地区：[1]杭州汽轮机股份有限公司,浙江杭州310022 [2]河北电力勘察设计院,河北石家庄050031 [3]河北邯峰电厂,河北邯郸056200

出　　处：《发电设备》2006年第1期17-21,共5页Power Equipment

摘　　要：河北邯峰电厂660 MW机组小汽轮机排汽管道产生65 mm位移,促使小汽轮机汽封间隙变化,影响小汽轮机试运行。通过对排汽管道建模,用有限元计算多种工况,证明排汽管变形的主要原因是万向铰接型膨胀节的常平环强度与刚度不够造成,经加强后解决了问题。In Hanfeng Power Plant the deformation caused displacement of a 660 MW set＇ s BFPT exhaust pipe effected a gland clearance change of the auxiliary turbine. By a finite element analysis of the modelized exhaust piping, under different modes of operation, disclosed that insufficient strength and rigidity of the gimbal hinged expansion joint＇ s gimbal ring was the main reason of exhaust pipe＇ s deformation. The problem got solved by taking some reinformcement measures.

关 键 词：能源与动力工程 小汽轮机 排汽管道 有限元分析 万向铰接型膨胀节 弹性基础 

分 类 号：TK263.5[动力工程及工程热物理—动力机械及工程]