水电机组在转子偏心影响下的非线性电磁振动分析  

An Analysis of Nonlinear Electromagnetic Vibration in the Hydraulic Turbine under the Influence of Rotor Eccentricity

作　　者：高程林 陈贵清[2] 

机构地区：[1]华北理工大学建筑工程学院,河北唐山063009 [2]唐山学院基础教学部,河北唐山063000

出　　处：《唐山学院学报》2015年第6期50-53,共4页Journal of Tangshan University

基　　金：唐山市重点实验室课题(tsxyzdsys-020)

摘　　要：介绍了水轮机组发电机转子在转动过程中的三种偏心:静偏心、振动偏心和转动偏心,建立了转子在不平衡电磁力作用下的非线性振动微分方程。采用数值方法分析了转动偏心和静偏心对轴系电磁振动特性的影响,结果表明,这两种偏心与电磁力呈非线性关系,随着偏心的增大使不平衡磁拉力作用不断加强,机组的横向振动固有频率有所降低,转子和转轮的振幅不断增大,倍频共振时的振幅也显著加大,转子系统展现出非常复杂的非线性动力学特征。The authors of this paper discuss the three kinds of eccentricity in the rotating process of the hydraulic turbine generator rotor：static eccentricity,vibrating eccentricity and rotary eccentricity,establish a nonlinear vibration differential equation of the rotor in the unbalanced electromagnetic force and analyze the influence of rotary eccentricity and static eccentricity on the characteristics of electromagnetic vibration of the shafting system.The results show that the relationship between the two eccentricities and electromagnetic force is nonlinear,that when the unbalanced magnetic force increase together with eccentricity,the natural frequency of the lateral vibration of the turbine decreases,the amplitude of the rotor and the wheel increases,and the amplitude of the frequency doubling also increases significantly and the rotor system exhibits very complex nonlinear dynamic characteristics.

关 键 词：水轮发电机组 偏心 不平衡电磁力 非线性振动 

分 类 号：TM312[电气工程—电机] O322[理学—一般力学与力学基础]