具有抽吸结构的空心静叶在100 MW机组上的应用  

Application of Hollow Static Blade with Suction Structure on 100 MW Unit

作　　者：徐俊 Xu Jun(Thermal Power Division,SINOPEC Shanghai Petrochemical Co.,Ltd.,Shanghai 200540)

机构地区：[1]中国石化上海石油化工股份有限公司热电部,上海200540

出　　处：《石油化工技术与经济》2020年第3期42-46,共5页Technology & Economics in Petrochemicals

摘　　要：某100 MW双抽汽轮机因设计排汽湿度过大,长期运行后末级叶片因水蚀累积出现了断裂征兆。介绍了其临时处理方案及改进设计方案,采用具有抽吸功能的空心静叶和隔板,可提高静叶的除湿功能,有效降低排汽湿度,从而降低末级动叶的水蚀断裂风险,同时有效保持机组的性能。After long-term operation of a 100 MW double-extraction steam turbine,the last-stage blades show signs of fracture due to accumulation of water erosion due to its design of excessively high exhaust steam humidity.The temporary treatment plan and the improved design plan are introduced.The use of hollow static blades and baffles with suction function can improve the dehumidification function of the static blades,effectively reduce the humidity of the exhaust steam,and thus reduce the risk of water erosion and fracture of the last-stage moving blades,while effectively maintaining the performance of the unit.

关 键 词：空心静叶 末级叶片 经济性 安全性 

分 类 号：TK269.1[动力工程及工程热物理—动力机械及工程]