汽轮机汽缸T形汽封槽加工方法  

Machining Method of T-shaped Steam Seal Groove in Steam Turbine Cylinder

作　　者：江叔云 陈荣 JIANG Shuyun;CHEN Rong(China Chang Jiang Energy Corporation,Wuhan 430074,China)

机构地区：[1]中国长江动力集团有限公司,武汉430074

出　　处：《机械工程师》2021年第10期150-151,154,共3页Mechanical Engineer

摘　　要：汽轮机前、后汽封的主要作用,是使蒸汽不向外泄漏。前、后汽封和隔板汽封均为梳齿形结构。每圈汽封都带有弹簧片,一旦汽封齿和轴相碰,汽封弧段可以做径向退让,减轻动静间的摩擦。小型汽轮机的汽封弧段是直接安装在汽缸上的,为保证汽封安装后的相对位置精度及使用性能,多数汽轮机汽缸汽封安装位采用T形槽结构,由于小型汽轮机汽封直径尺寸较小,汽封级数较多因而加工难度较大,加工周期长,文中着重对某小型汽轮机前汽缸前汽封位T形汽封槽加工方法进行研究。The main function of the front and rear steam seals above the steam turbine is to keep the steam from leaking out.The front,rear and diaphragm steam seals are comb-toothed structure.Each lap of steam seal has a spring piece,the steam seal radian part can make a radial concession to reduce the friction between the dynamic and static movement once the seal teeth are in contact with the shaft.The steam seal arc section of small steam turbine is directly installed on the cylinder.To ensure the relative position accuracy and service performance after the steam seal installation,most installations of steam seals for steam turbines are T-shaped groove structures.Because the small steam turbine seal diameter size is smaller and the series of steam seal are more,so the processing difficulty is larger and the processing cycle is long.This paper studies the processing method of T-shaped seal groove for the front cylinder of a small steam turbine.

关 键 词：汽轮机 汽缸 汽封 T形槽 

分 类 号：TK263.2[动力工程及工程热物理—动力机械及工程]