汽轮机动静间隙对经济性与安全性的影响

分析了汽封间隙对机组振动的阻尼作用及其阻尼系数与振幅的关系。根据分析可知，汽封间隙不仅影响机组经济性，而且对机组振动也有很大的阻尼作用。
关键词：汽轮机组；汽封间隙；摩擦阻尼
分类号：TK263．2    文献标识码：A    文章编号：1001—5884(2003)01-0023-02

Influence about Clearance of Rotor and Stator of Turbine for Economy and Safety of Turbine
              ZHANG Ai-ping1 ，BAOLi2，YE Rong-xue1

(1Department of Thermal Power Engineering，Northeast China Institute of Electric
Power Engineering，Jilin 132012，China；2 Jilin Heat Power Plant，Ji1in 132021，China)
Abstract：It is analyzed that clearance of gland seal has damping action to vibration of the unit，and relationship of amplitude and damping coefficient of them js analyzed．According to analysis，clearance of gland seal not only influences economy of the unit ,but has very damping action to vibration．
Key words：turbine unit；friction damp；clearance of gland seal

汽轮机是山转子和静子两部分组成的高速旋转机械，动静之刊的间隙对汽轮机组的安全性和经济性有很大影响。汽轮机动静之间的间隙包括轴颈与轴瓦之间的间隙和隔板汽封与大轴之间的间隙、轴封间隙以及动叶栅与汽缸之间的间隙，其中轴颈与轴瓦之间的间隙仅影响机组的安全性，而其它几部分间隙不对机组的安全性有影响，而且对机组的经济性也有很大影响。