混流式水轮发电机组横向振动动力响应分析  

An Analysis of Lateral Vibration Dynamic Response on the Rotating Parts of a Francis Turbine

作　　者：朱毅[1] 赖喜德[1] 张惟斌[1] 

机构地区：[1]西华大学能源与环境学院,成都610039

出　　处：《中国农村水利水电》2011年第12期151-155,共5页China Rural Water and Hydropower

基　　金：四川省科技支撑计划重点攻关项目(2008GZ0072);西华大学流体及动力机械省部共建教育部重点实验室及四川重点学科建设重点项目(SZD0412-9)

摘　　要：建立了考虑作用于转子与转轮上不平衡力的大型水轮发电机组振动计算模型,以某混流式水轮发电机组为例,采用有限元法对机组转动部分的动力响应进行了计算和分析,主要讨论了不平衡力的相位差、结构阻尼比、导轴承刚度和转动频率对机组动力响应的影响,在刚性支撑模型基础上改变不平衡力的相位差,在弹性支撑模型基础上改变结构阻尼比和各个导轴承刚度进行了分析比较。计算结果表明不平衡力的相位差、结构阻尼比、导轴承刚度和转动频率对机组动力响应都有着不同程度的影响,为减小机组振动以及优化水轮发电机组支撑结构提供了参考。The vibration calculation models of large scale hydraulic turbine are established in this paper. Taking X Francis hydro turbine generator set for example, FEM is adopted to simulate and analyze the dynamic response of rotational parts. The influence of phase difference of unbalanced force, structural damping ratio, stiffness of guide bearing and rotational frequency on dynamic re- sponse is specifically discussed. Based on the rigid supporting models, the phase difference of unbalanced force is modified. Based on the elastic supporting models, the structural damping ratio and guide bearing stiffness are modified. The results indicate that phase difference of unbalanced force, structural damping ratio, guide bearing stiffness and rotational frequency have various influences on the dynamic response. It could provide reference for reducing vibration and optimizing supporting structure of hydraulic turbines.

关 键 词：水轮发电机组 相位差 结构阻尼比 导轴承刚度 谐响应 

分 类 号：TK733.1[交通运输工程—轮机工程]