共查询到19条相似文献,搜索用时 218 毫秒
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一般基于轴类转子的磁力轴承系统由一个推力磁力轴承和两个径向磁力轴承组成,这种结构不可避免地带来各种磁力耦合,经常会使转子产生激振或位移,给控制系统造成很大的干扰。提出了一种基于盘类转子的磁力轴承系统,在很大程度上减轻了这种影响。 相似文献
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磁悬浮转子系统是磁力轴承的一个典型应用。介绍了一种科普用磁悬浮转子系统演示装置的基本结构、控制原理,并给出了基于MATLAB的径向磁力轴承的控制方案和仿真结果。 相似文献
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研究了基础运动对磁力轴承转子系统动力学特性的影响,结合转子运动方程和系统控制器的电学微分方程,分析了陀螺效应、传感器与磁轴承非共点安装对系统动力学性能的影响,建立了磁悬浮轴承-转子-基础系统的机电耦合动力学模型,应用所建模型对5自由度磁悬浮转子系统进行了动力学性能分析。结果表明,基础的支承刚度对转子的摆动频率及临界转速影响显著,该模型适用于5自由度磁悬浮轴承-转子-基础系统的动力学性能研究。 相似文献
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提出了一种新型的磁悬浮支承系统,它是由电动磁力轴承和带锥面磁隙的永磁磁力轴承构成的。分析了电动磁力轴承的悬浮机理,对比分析了平面磁隙和锥面磁隙的两种永磁磁力轴承的悬浮特性,利用电磁场有限元理论计算了两种永磁轴承在不同径向偏移时的径向磁力,并绘制了它们的关系曲线。 相似文献
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随着现代先进制造业的高速发展,对于轴承的要求越来越高,传统轴承很难满足这些要求。将磁悬浮技术引入泵的转子系统上,用被动永磁轴承替代传统的机械轴承,基于磁路设计原理计算出轴承尺寸,并通过等效磁荷法分析永磁轴承的承载力及轴向力。 相似文献
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In an active magnetic bearing(AMB) system,the catcher bearings(CBs) are indispensable to protect the rotor and stator in case the magnetic bearings fail.Most of the former researches associated with CBs are mainly focused on the dynamic responses of the rotor drops onto traditional single-decker catcher bearings(SDCBs).But because of the lower limited speed of SDCB,it cannot withstand the ultra high speed rotation after rotor drop.In this paper,based on the analysis of the disadvantages of SDCBs,a new type of double-decker catcher bearings(DDCBs) is proposed to enhance the CB work performance in AMB system.In order to obtain the accurate rotor movements before AMB failure,the dynamic characteristics of AMB are theoretically derived.Detailed simulation models containing rigid rotor model,contact model between rotor and inner race,DDCB force model as well as heating model after rotor drop are established.Then,using those established models the dynamic responses of rotor drops onto DDCBs and SDCBs are respectively simulated.The rotor orbits,contact forces,spin speeds of various parts and heat energies after AMB failure are mainly analyzed.The simulation results show that DDCBs can effectively improve the CBs limit rotational speed and reduce the following vibrations,impacts and heating.Finally,rotor drop experiments choosing different types of CBs are carried out on the established AMB test bench.Rotor orbits,inner race temperatures as well as the rotating speeds of both inner race and intermediate races after rotor drop are synchronously measured.The experiment results verify the advantages of DDCB and the correctness of theoretical analysis.The studies provide certain theoretical and experimental references for the application of DDCBs in AMB system. 相似文献
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磁力轴承刚度的实验测量方法 总被引:2,自引:0,他引:2
在磁力轴承研究中关于磁力轴承刚度存在两种不同的定义,从转子受力分析和控制系统传递函数角度看,这两种刚度定义之间存在差异。针对两种不同的刚度定义分别给出了其测量方法,并设计了磁力轴承刚度测量的实验系统。该实验系统可以实现磁悬浮转子静态悬浮、刚性旋转和柔性旋转工作状态下的刚度测量。 相似文献
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F. M. Mitenkov V. S. Vostokov V. S. Gorbunov N. G. Kodochigov A. V. Khodykin 《Journal of Machinery Manufacture and Reliability》2008,37(1):74-76
The stability of an electromagnetic bearing control system-rotor system with a nonlinear dependence of the magnetic force on the control current is studied by analytical and experimental methods. The possibility of implementing an electromagnetic suspension of a rotor in the absence of currents of initial magnetic biasing is demonstrated. The advantages and disadvantages of such an implementation of the control system are determined. A program for calculating the time evolution of the motion of a rotor on electromagnetic bearings is developed and implemented in practice. A technique for verifying the program under conditions where initial data for calculations are not known accurately is proposed. 相似文献
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Zhang GangZhang JianshengLi SongshengYang XinzhouWu JianfengWang XipingSchool of ElectromechanicalEngineering Automation Shanghai University Shanghai ChinaYu Lie Xie YoubaiTheory of Lubrication andBearing Institute Xi''''an Jiaotong University Xi''''an China 《机械工程学报(英文版)》2004,17(1):93-96
The influences of thrust magnetic bearing and journal tilt on dynamic characteristics of rotor system are studied mainly. The outcome shows that the influences of coupling effects of thrust magnetic bearing and tilt of journal on critical rotational speeds of system are very large, and the stability of system reduces greatly. That shows it is important that the influence of coupling effects of thrust and radial magnetic bearings due to the rotor tilting must be considered in the study of rotor-magnetic bearings system dynamic characteristics, and also shows it is important that the rotor is mounted and debugged in ideal alignment of magnetic bearings. 相似文献
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飞轮储能磁轴承系统结构及其悬浮特性 总被引:1,自引:2,他引:1
介绍了一种由径向永磁轴承与电磁推力轴承组成的单轴主动控制的飞轮储能磁轴承系统结构 ,径向永磁轴承提供径向恢复力与轴向悬浮力 ,电磁推力轴承提供轴向恢复力。并对系统的结构参数计算及其磁悬浮特性进行了分析与讨论。研究结果表明 ,永磁轴承动、静磁环轴向位移对系统承载力与刚度有明显影响 ,采用多对磁环永磁轴承 ,有利于提高系统承载力与径向刚度 相似文献