汽轮机叶片飞脱原因分析与处理  

Analysis and Treatment on Steam Turbine Blade Falling-off

作　　者：吴立民[1] 张小利[1] 王红兵[1] 

机构地区：[1]河北省电力研究院,石家庄050021

出　　处：《河北电力技术》2007年第3期33-34,52,共3页Hebei Electric Power

摘　　要：针对某电厂1号汽轮机在启动过程中叶轮叶片飞脱事故,从机组启动试运行和安装检查两方面查找原因,确定为第6级叶轮出汽边轮缘与第7级隔板间轴向间隙过小造成的动静摩擦、叶片飞脱。经返厂车削转子的第7级隔板静叶,增大第6级叶轮与第7级隔板间轴向间隙后,机组启动过程中热膨胀顺畅,保证了机组安全运行。Aiming at the accident of 1th steam turbine blade falling off and wheel wear out in start-up in some power plant,the cause is found from the aspects of units start-up and installation test,that is the axis side clearance is too short between the flange of the 6th level impeller steam-out side and the 7th clapboard.After turning the stay blade and accreting the clearance,the heat expands smoothly during unit start-up to ensure safe operation of units.

关 键 词：汽轮机 叶片 飞脱 处理 原因分析 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]