配汽方式对调节级叶片-轮盘安全性的影响  

Security analysis of blade-disc in governing stage under various sequence valve modes

作　　者：常东锋 贾红金 江浩 谷伟伟 CHANG Dongfeng JIA Hongjin JIANG Hao GU Weiwei(Xi＇an Thermal Power Research Institute Co. ,Ltd. ,Xi＇an 710032,China Huaneng Nanjing Jinling Power Generation Co. , Ltd. , Nanjing 210034 ,China)

机构地区：[1]西安西热节能技术有限公司,陕西西安710032 [2]华能金陵发电有限公司,江苏南京210034

出　　处：《热力发电》2016年第10期89-93,103,共6页Thermal Power Generation

基　　金：华能集团科技资助项目(HNKJ12-H73)

摘　　要：以某600 MW汽轮机调节级叶片为对象,采用有限元方法,对不同配汽方式下调节级整圈叶片-轮盘系统的结构应力、振动特性、瞬态动力响应和动应力,以及疲劳寿命进行了计算分析。结果表明:不同配汽方式下,调节级叶轮叶片系统静强度和振动特性尚属安全;但动应力和疲劳寿命变化幅度较大,其中调节阀在(1号+2号)-3号-4号的顺序阀配置方式下疲劳寿命缩短至6.7年,已不满足设计要求。Taking the governing stage of a 600 MW unit steam turbine as the research object,the finite ele- ment method was applied to investigate the structural stress, vibration characteristics, transient dynamic re- sponse, dynamic stress and fatigue life of the governing stage, under various sequence valve modes. The re- sults show that, sequence valve modes have great influence on the dynamic stress and fatigue life of the governing stage,although the static intensity and transient dynamic response are security.

关 键 词：汽轮机 调节级 叶片 配汽方式 顺序阀 有限元分析 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]