600MW火电机组低压缸次末级叶片装配工艺改进  

Improvement of Assembly Process for Low-pressure Cylinder Penultimate Stage Blades for 600 MW Thermal Power Units

作　　者：刘海昌 于晓龙 李卫军[2] 

机构地区：[1]浙江大唐乌沙山发电有限责任公司,浙江宁波315722 [2]浙江省电力试验研究院,杭州310014

出　　处：《浙江电力》2012年第6期38-40,共3页Zhejiang Electric Power

摘　　要：由于低压缸次末级叶片曾发生围带断裂事故,经研究分析,认为断裂原因主要是设计、制造及装配存在问题,是围带装配过紧所致。现场拆下叶片进行清理,对围带出汽边叶顶处的R4倒角进行打磨,圆滑过渡,对叶片进行重新松装,以保证机组的安全运行。As the shroud fracture accident occurs in penultimate stage blades of low-pressure cylinder,the main reason is identified through the analysis as the problems in design,manufacturing and assembly and the excessively tight shroud assembly.The field removal of the blades for cleaning is carried out.The R4 chamfering on blade tip of trailing edge of shroud is grinded for smooth transition and the blades are loose fitted again to ensure the safe operation of the units.

关 键 词：低压缸 次末级 叶片 装配工艺 改进 

分 类 号：TK266[动力工程及工程热物理—动力机械及工程]