分析了汽封間隙對機組振動的阻尼作用及其阻尼系數與振幅的關系。根據分析可知，汽封間隙不僅影響機組經濟性，而且對機組振動也有很大的阻尼作用。
關鍵詞：汽輪機組；汽封間隙；摩擦阻尼
分類號：TK263．2??? 文獻標識碼：A??? 文章編號：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

汽輪機是山轉子和靜子兩部分組成的高速旋轉機械，動靜之刊的間隙對汽輪機組的安全性和經濟性有很大影響。汽輪機動靜之間的間隙包括軸頸與軸瓦之間的間隙和隔板汽封與大軸之間的間隙、軸封間隙以及動葉柵與汽缸之間的間隙，其中軸頸與軸瓦之間的間隙僅影響機組的安全性，而其它幾部分間隙不對機組的安全性有影響，而且對機組的經濟性也有很大影響。