A Tubular Hydro-Generator Through Bolts Failure Analysis
After running for several years, in the maintenance of a tubular turbine, many through bolts melted, and fatigue fracture, insulation damage were found.First, an analysis is done.Then simulation calculations are done to investigate the additional losses and the electromagnetic force acted on the through-bolts.Finally, the modal is analyzed.The results show that after long-term operation, under the action of the electromagnetic force vibration, fatigue, deformation, short circuit to stator core is formed with key bars, and a lot of heat is generated.That” s the reason how the accidents occur.At last, treatment suggestions are proposed.A year after the treatment, the bolts condition are examined and it shows they running well.
hydro-generator through-bolt melting finite element fault diagnosis
Li Jianfu Zhou Guanghou Liao Yigang Xiao Jian Liu Chuankun
国内会议
北京
英文
440-449
2013-11-01（万方平台首次上网日期，不代表论文的发表时间）