某335MW机组启动过程中烧瓦事故原因分析及处理  

Analysis and treatment of the cause of a 335 MW unit 's tire burning during start-up process

作　　者：邱化海 李峰 景豹 QIU Huahai;LI Feng;JING Bao(Huadian Zhangqiu Power Generation Company Limited,Ji’nan 250216,China)

机构地区：[1]华电章丘发电有限公司,济南250216

出　　处：《华电技术》2018年第3期21-23,77,共4页HUADIAN TECHNOLOGY

摘　　要：某电厂#4机组大修后,发电励磁机#7轴承在启动过程中两次烧瓦。分析认为,轴瓦温度异常升高不仅与轴瓦负载大有关,当轴瓦载荷不足,轴径和轴瓦接触不良,间隙过大致使轴瓦无足够的力固定轴径导致轴径甩动,油膜无法建立造成轴瓦与轴径干磨时,同样会造成轴瓦损坏。使用排除分析法进行分析,得出了#7轴承通过调整建立油膜是解决问题关键的结论。After the overhaul of#4 unit of a power plant,there has been 2 tile burning accidents on power generation exciter’s#7 bearing bush in the start-up process.According to analyze,abnormal temperature rise is not only related to large bearing load.The insufficient bearing load,poor contact between axle and bearing bush,the shake of bearing bush caused by large clearance which leads to no enough force to fasten,and dry grinding between bearing bush and axel caused by lacking oil film,can also lead to damage of bearing bush.Using the exclusion analysis method,it is concluded that the building oil film through increasing load is the key to solve the problem on#7 bearing bush.

关 键 词：励磁机 轴瓦 可倾瓦 烧瓦 油膜 温度异常 载荷 

分 类 号：TM311[电气工程—电机]