立式离心泵磁悬浮轴承的性能分析与应用  

Performance analysis and application of mganetic bearings for centrifugal pump

作　　者：纪平[1] 陈君辉[2] 杨逢瑜[2] 

机构地区：[1]甘肃广播电视大学,甘肃兰州730030 [2]兰州理工大学能源与动力工程学院,甘肃兰州730050

出　　处：《机械设计》2013年第11期52-56,共5页Journal of Machine Design

基　　金：甘肃省高等学校研究生导师科研资助项目(1220-01)

摘　　要：导轴承是立式离心泵的关键部件。当前使用的橡胶轴承及赛龙轴承由于磨损和泥沙嵌入而导致主轴损坏,从而缩短立式离心泵运行周期。提出使用磁悬浮轴承,研究立式离心泵的运行工况及故障点,设计了立式离心泵的磁悬浮轴承装置。通过Ansoft仿真分析磁悬浮轴承的磁场、磁能分布、磁力大小等,并在ANSYS上做了应力分析,研究最大工作点变形情况,以UG设计系统三维模型,在Adams与MATLAB上仿真系统动力特征,进行优化设计。试验中在Code Composer Studio2上调试DSP控制程序,设计出离心泵磁悬浮轴承控制系统。试验结果表明:设计的磁悬浮轴承运行效率较橡胶轴承立式离心泵提高了4%～6%,延长导轴承的无故障使用周期6～8倍;相对赛龙轴承立式离心泵运行效率提高了3%～5%,延长导轴承的无故障使用周期3～4倍。The guide bearing is a easily abraded part of vertical centrifugal pump,which determines the reliability and durability of vertical centrifugal pump.Currently,the guide bearing at the end of impeller is easily destroyed by the sediment embedding.Neither the rubber shaft bearing nor Ceron bearing can well solve this problem.A suggestion of replacing them with the magnetic bearing is put forward and the operating conditions as well as the fault point of vertical centrifugal pump is studied in this paper.Then a vertical centrifugal pump magnetic bearing device is designed.Magnetic field distribution,magnetic energy distribution,and magnetic force of magnetic bearing are analyzed through the Ansoft simulation.Stress analysis and deformation of the maximum working point are studied by ANSYS.The result is used to design the three-dimensional model by UG.Then,it is programmed and co-simulated dynamic characteristics of the system in the Adams and MATLAB to optimize the system design.Test is designed according to the simulation results.DSP procedure is programmed and debugged through Code Composer Studio2.At last,the centrifugal magnetic bearing control system is designed.Experimental results indicate that compared with rubber shaft bearing,the design will improve the efficiency with 4％～6％,and extend the no-failure life with 6～8 times of vertical centrifugal pump.Similarly,compared with the Ceron Bearings,it will improve the efficiency with 3％～5％ and extend the no-failure life with 3～4 times of vertical centrifugal pump.

关 键 词：导轴承 磁悬浮轴承 离心泵 赛龙轴承 橡胶轴承 

分 类 号：TH311[机械工程—机械制造及自动化]