磁力耦合联轴器三维传递转矩及特性参数分析
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摘要
针对传统二维方法因忽略端面效应导致磁力耦合联轴器传递转矩计算不精确问题,借助单对永磁体传递转矩的库伦表达,建立具有多对弧形永磁体结构的磁力联轴器三维转矩解析模型,通过与三维有限元模型磁场分析对比验证了该模型可行性。对磁力耦合联轴器转矩特性参数包括:磁极对数、转子厚度、磁体轴向长度、节距比等对传递转矩的影响进行了分析,研究结果表明:合理选择磁极对数并适当减小气隙厚度有利于增加传递转矩;传递转矩随内、外转子厚度的增加而变大,但变化率逐渐减小;当转子轴向长度大于径向长度时,漏磁现象显著减小;选择合适的节距比有利于提高永磁材料的利用率。提出的磁力耦合联轴器三维转矩模型可为联轴器的结构设计与优化提供理论指导。
Due to the traditional torque calculation methods in the magnetic coupling being imprecise for ignoring the end effect,a 3 D analytical model for calculating the torque transmitted between the p-pair permanent magnets based on the expression of one pair magnets was presented. This model was verified by comparing the magnetic field analysis calculated by the 3 D finite element model. Then the torque characteristic parameters of magnetic pole pairs,rotor thickness,magnets axial length and pitch ratio were analyzed by these two models. It is concluded that,choosing proper pole pairs and reducing the thickness of air gap appropriately are helpful to increase the transmission torque,and the torque is larger with the increment of the thickness of inner and outer rotors,and whereas the change rate decreases. Besides,the magnetic flux leakage reduces significantly when the rotor axial length is larger than the radial length,and the suitable pitch ratio is conducive to improve the utilization of permanent magnet materials. The proposed torque analytical model provides scientific guidance to the design and optimization of magnetic coupling structure.
Due to the traditional torque calculation methods in the magnetic coupling being imprecise for ignoring the end effect,a 3 D analytical model for calculating the torque transmitted between the p-pair permanent magnets based on the expression of one pair magnets was presented. This model was verified by comparing the magnetic field analysis calculated by the 3 D finite element model. Then the torque characteristic parameters of magnetic pole pairs,rotor thickness,magnets axial length and pitch ratio were analyzed by these two models. It is concluded that,choosing proper pole pairs and reducing the thickness of air gap appropriately are helpful to increase the transmission torque,and the torque is larger with the increment of the thickness of inner and outer rotors,and whereas the change rate decreases. Besides,the magnetic flux leakage reduces significantly when the rotor axial length is larger than the radial length,and the suitable pitch ratio is conducive to improve the utilization of permanent magnet materials. The proposed torque analytical model provides scientific guidance to the design and optimization of magnetic coupling structure.
引文
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[7]王宝仁,张会荣,李凤琴,等.磁流变联轴器的结构设计与磁路特性分析[J].煤矿机械,2013,34(7):117.WANG Baoren,ZHANG Huirong,LI Fengqin,et al.Structural design of MRC and magnetic circuitcharacteristics analysis[J].Coal Mine Machinery,2013,34(7):117.
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[11]赵克中.磁耦合双向驱动控制器的研究[D].东北大学,2006.
[2]FABECK P.Magnetic drive pumps for the chemical industry[J].World Pumps,1995(341):51.
[3]邓文娟,巴德纯,王玉良.永磁传动与真空密封技术研究现状与发展[J].真空科学与技术学报,2014,34(10):1081.DENG Wenjuan,BA Dechun,WANG Yuliang.Latest development of permanent magnetic drivingtechnology for vacuum dynamic sealing[J].Chinese Journal of Vacuum Science and Technology,2014,34(10):1081.
[4]张毓,吴建华.磁力联轴器静态转矩特性研究与参数优化[J].化工机械,2012,39(5):605.
[5]杨超君,李全文,马宏亮,等.耐高温异步磁力联轴器功率及转矩的分析计算[J].机械设计与制造,2008,(3):15.YANG Chaojun,LI Quanwen,MA Hongliang,et al.Calculation about power and torque of asynchronous magneticcoupling enduring high temperature[J].Machinery Design&Manufacure,2008,(3):15.
[6]丁磊,杨超君,孔令营.角向不对中可调速盘式异步磁力联轴器的转矩特性分析[J].机械设计与研究,2012,28(6):63.DING Lei,YANG Chaojun,KONG Lingying.Torque characteristics analysis of adjustable axialasynchronous permanent magnet couplings with angular misalignment[J].Machine Design and Research,2012,28(6):63.
[7]王宝仁,张会荣,李凤琴,等.磁流变联轴器的结构设计与磁路特性分析[J].煤矿机械,2013,34(7):117.WANG Baoren,ZHANG Huirong,LI Fengqin,et al.Structural design of MRC and magnetic circuitcharacteristics analysis[J].Coal Mine Machinery,2013,34(7):117.
[8]HOGBERG S,Jensen B B,Bendixen F B.Design and demonstration of a test-rig for static performance-studies of permanent magnet couplings[J].IEEE Transactions on Magnetics,2013,49(12):5664.
[9]HONG S A,CHOI J Y,JANG S M,et al.Torque analysis and experimental testing of axial flux permanent magnet couplings using analytical field calculations based on two polar coordinate systems[J].IEEE Transactions on Magnetics,2014,50(11):1.
[10]RAVAUD R,LEMARQUAND V,LEMARQUAND G.Analytical design of permanent magnet radial couplings[J].IEEE Transactions on Magnetics,2010,46(11):3860.
[11]赵克中.磁耦合双向驱动控制器的研究[D].东北大学,2006.