Shaft Crack Analysis and Diagnosis for the 600MW Steam Turbine Generator

摘要：

In order to find the cause of the shaft crack appeared in a 600MW steam turbine generator,several measurements are taken.The shaft assembly consists of three parts: shrink-fitted coupling,shaft and key which are used to transfer torque between coupling and shaft.First,the natural frequency of the shaft system is calculated.The result shows that the vibration signal contains the frequency nears the second natural frequency of the steam turbine shaft system.Second,stress field near the damaged coupling and shaft is analyzed using finite element method.The torque under different operation condition is calculated before stress analysis and applied to the shaft assembly,then.And,local stress concentrations position calculated is proved to be coincident with the place crack initiation.Finally,the cause of the fault is analyzed: at least three causes have found to be having something to do with the crack fault.

关键词： Shaft crack generator finite element method fault diagnosis

作者: Jiang Dongxiang Hong Liangyou Huang Qian

作者单位: State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Thermal Engineering,Tsinghua University,Beijing 100084,China

会议类型: 国际会议

会议名称: The 8th International Conference on Damage Assessment of Structures(DAMAS 2009)(第八届结构损伤评价国际学术会议)

会议地点: 北京

会议语种:英文

页码: 591-598

在线出版日期: 2009-08-03（万方平台首次上网日期，不代表论文的发表时间）