水轮机磁悬浮导轴承动力学特性  

Research on Dynamic Characteristics of a Magnetic Suspension Guide Bearing in a Hydro-turbine

作　　者：李正贵[1] 李博[1] 柴芯 董国锋[3] 刘小兵[1] 杨逢瑜[1] LI Zheng-gui;LI Bo;CHAI Xin;DONG Guo-feng;LIU Xiao-bing;YANG Feng-yu(Key Laboratory of Fluid and Power Machinery,Ministry of Education ,Xihua University,Chengdu 610039,Sichuan Province,China;Xihua University Library,Chengdu 610039,Sichuan Province,China;International Center on Small Hydro Power,Hangzhou 310002,Zhejiang Province,China)

机构地区：[1]西华大学流体与动力工程教育部重点实验室,四川成都610039 [2]西华大学图书馆,四川成都610039 [3]国际小水电中心,浙江杭州310002

出　　处：《中国农村水利水电》2019年第1期198-202,共5页China Rural Water and Hydropower

基　　金：国家重点研发计划专项(2018YFB0905205);创新人才项目(xjjg2017083);四川教育厅重大培育项目(17CZ0034);教育部重点实验室开放课题(szjj2017-089)

摘　　要：水轮机磁悬浮导轴承是一种无油轴承,其工程可靠性一直没有很好的解决。作者应用理论分析方法及基于其Halbach阵列的动力学特性ANSYS仿真,对水轮机径向混合磁悬浮导轴承动力特性的非线性模型及其线性化方程进行研究,设计了一种水轮机径向混合磁悬浮导轴承。研究表明在单一自由度上水轮机径向混合磁悬浮导轴承具备自稳定的特性,其负刚度可以通过轴承永磁特性调节;单元磁环厚度越大,Halbach阵列的水轮机磁悬浮永磁导轴承径向磁力越大,一定程度内表现为近似线性,之后过渡到非线性趋势,最后磁力趋于某一定值;计算结果与仿真结果偏差小于0.69%。该研究结论为水轮机径向磁悬浮导轴承装置在工程应用中提供一定指导。The hydro-turbine magnetic suspension guide bearing is a kind of oil-less bearing. Its reliability in engineering has not been solved well. So the theoretical analysis method and an ANSYS simulation is utilized based on its Halbach Array to study the dynamic character’s nonlinear model and linearity equation of hydro-turbine radial hybrid magnetic suspension guide bearings. On this basis,the author designed a type pf hydro-turbine radial hybrid magnetic suspension guide bearing. The research shows that it has the self-stabilizing characters in terms of a single degree of freedom and its negative rigidity can be adjusted through the bearing’s permanent-magnetic character.With enlargement of magnetic loop’s thickness in each unit,the radial magnetic force of the hydro-turbine magnetic suspension permanentmagnetic guide bearing with Halbach Array will be enlarged. To a certain degree,it appears to be approximately linear and transits the nonlinear trend later. When the magnetic force reaches a certain definite value,the deviation between the calculation result and the simulation result will be less than 0.69%. This research conclusion can be used for engineering applications of the hydro-turbine radial hybrid magnetic suspension guide bearing.

关 键 词：水轮机 磁悬浮导轴承 动力特性 工程应用 

分 类 号：TV34[水利工程—水工结构工程]