筒形汽缸隔板结构对其变形特性的影响研究  

Study on the Influence of Diaphragm Structure of Cylindrical Casing on Its Deformation Characteristics

作　　者：章艳[1] 刘东旗[1] 赵仕志[1] 陈铁宁[1] ZHANG Yan;LIU Dongqi;ZHAO Shizhi;CHEN Tiening(Dongfang Turbine Co.,Ltd.,618000,Deyang,Sichuan,China)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方电气评论》2021年第3期66-69,共4页Dongfang Electric Review

摘　　要：本文首先介绍了隔板与汽缸、转子配合结构,并对隔板设计要素以及动静间间隙控制做了阐述。并采用三维有限元法对筒形汽缸包括其内部4级典型级次隔板装配结构建立有限元分析模型,分别计算了其在机械载荷作用下以及稳定运行工况时,隔板的变形、隔板径向汽封变形,隔板与汽缸贴合面接触状态,并与独立隔板模型分析结果进行对比,提出独立隔板分析模型满足工程隔板挠度分析要求,整体计算结果来看,隔板与汽缸贴合面接触较好,并且隔板汽封齿不会与转子发生碰磨。Firstly,this paper introduces the matching structure of diaphragm,cylinder and rotor,and expounds the design elements of diaphragm and the gap control between dynamic and static.The three-dimensional finite element method is used to establish the finite element analysis model of the cylindrical cylinder,including its internal 4-stage typical diaphragm assembly structure.Under the action of mechanical load and stable operation conditions,the deformation of diaphragm,the deformation of diaphragm radial steam seal and the contact state between diaphragm and cylinder are calculated respectively,and compared with the analysis results of independent diaphragm model.The independent diaphragm analysis model is proposed to meet the requirements of Engineering diaphragm deflection analysis.According to the overall calculation results,the contact between diaphragm and cylinder is good,and the diaphragm steam seal teeth will not collide with the rotor.

关 键 词：筒形缸 隔板 汽封间隙 汽密性 有限元 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]