二次再热超超临界汽轮发电机组轴系动力响应特性研究  

Research on the Rotor Dynamic Response Characteristicsof the Double Reheat Ultra Supercritical Turbo-generator

作　　者：王文飚 薛建明 谭锐 何新荣 董月红 郭瑞[2] WANG Wen-biao;XUE Jian-ming;TAN Rui;HE Xin-rong;DONG Yue-hong;GUO Rui(Guodian Research Institute of Science and Technology Company Limited State Key Laboratory of Clean and Efficient Coal-fired Power Generation and Pollution Control,Nanjing 210046,China;Nation Engineer Research Center of Turbo-generator Unit Vibration,Southeast University,Nanjing 210096,China)

机构地区：[1]国电科学技术研究院有限公司清洁高效燃煤发电与污染控制国家重点实验室,南京210046 [2]东南大学火电机组振动国家工程研究中心,南京210096

出　　处：《汽轮机技术》2020年第5期363-366,共4页Turbine Technology

基　　金：“清洁高效燃煤发电与污染控制国家重点实验室开放课题基金资助项目”支持。

摘　　要：以某型1000MW二次再热超超临界汽轮发电机组轴系为对象,建立了轴系有限元求解模型,深入研究了轴系的固有频率分布、同相及反相分量后的响应等动力特性。结果表明,轴系超高压及高压转子模态耦合效应明显;轴系中各转子在不平衡力的作用下前瓦的振幅响应要大于后瓦,后侧的转子影响前侧的转子;相对于对称不平衡质量分布,反对称质量分布引起的响应特性更为复杂,它会同时激发出本转子和邻近前一个转子的一阶振型;1号瓦截面处的振动响应易受到后面各转子不平衡量的影响,尤其是反对称不平衡量的影响,低压转子的反对称不平衡也会引起1号瓦在2200r/min处出现峰值;在工作转速下时,承载转子的两侧各瓦从相位来看能体现出对应的振型。In this paper,the finite element model of a 1000MW steam turbine generator shafting is established,and the dynamic characteristics such as the natural frequency distribution,the response of in andreversed-phase components,were studied.The results show that the coupling effect of the super-high pressure and high pressure rotor modes is obvious;the amplitude response of the front bearing is greater than that of the back bearing under the unbalanced force,and the rear rotor affects the front rotor.Compared with the symmetrical unbalanced mass,the response characteristics caused by the antisymmetric mass are more complex,which will simultaneously excite the response of the rotor and the adjacent previous rotor the first-order vibration mode:the vibration response of No.1 bearing is easily affected by the unbalance of the rear rotors,especially the antisymmetric unbalance.At the working speed,the bearing pads on both sides of the rotor can reflect the corresponding vibration mode from the phase point of view.

关 键 词：二次再热超超临界 动力特性 有限元模型 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]