电磁式平衡头动环自锁特性分析与实验研究  

Analysis and experimental study of self-locking characteristics of the dynamic ring of electromagnetic balance head

作　　者：刘胜龙 刘保国[1,2] 冯伟 梁警威[1,2] 武航飞 刘彦旭 LIU Sheng-long;LIU Bao-guo;FENG Wei;LIANG Jing-wei;WU Hang-fei;LIU Yan-xu(School of Mechanical and Electrical Engineering,Henan University of Technology,Zhengzhou 450001,China;Henan Key Laboratory for Super Abrasive Grinding Equipment,Zhengzhou 450001,China)

机构地区：[1]河南工业大学机电工程学院,河南郑州450001 [2]河南省超硬磨料磨削装备重点试验室,河南郑州450001

出　　处：《机电工程》2023年第3期429-434,460,共7页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金面上资助项目(12072106);国家自然科学基金-河南联合基金资助项目(U1604254)。

摘　　要：针对电磁式平衡头动环结构整体设计过程中存在的自锁磁场与自锁力矩问题,对电磁式平衡头动环自锁特性进行了有限元仿真分析与实验研究。首先,根据磁路自锁原理,建立了由磁性齿盘、永磁体、配重盘3个零件构成的三维模型;然后,利用Ansoft-Maxwell平台,通过控制单一变量的方式,分析了永磁体对数对气隙磁密和自锁力矩大小的影响,研究了气隙对自锁力矩的影响;最后,基于扭矩传感器及LabVIEW软、硬件搭建了实验平台,通过增减垫片数量的方式,进行了自锁力矩气隙实验。研究结果表明:永磁体对数从8对增加到18对时,有效工作区最小磁通密度增加了103%;有限元分析结果与实验结果的差值在15%以内,且实验数值与有限元分析数值整体趋势一致,自锁力矩随气隙的增大逐渐减小;该实验结果证实了仿真结果的可靠性,为电磁平衡装置的整体分析与优化提供了依据。Aiming at the problem of self-locking magnetic fields and self-locking moments in the overall design of the dynamic ring structure of electromagnetic balance head,the finite element simulation analysis and experimental research on the self-locking characteristics of the moving ring of the electromagnetic balancing head were carried out.Firstly,a three-dimensional model consisting of a magnetic tooth disc,a permanent magnet and a counterweight disc was established based on the principle of self-locking of the magnetic circuit.Then,by means of Ansoft Maxwell platform and with the change of single variable,the effect of the pairs of permanent magnets on the magnitude of the air gap magnetic density and self-locking torque was analyzed.The effect of the air gap on the self-locking torque was studied.Finally,the test platform was built based on the torque sensor,LabVIEW software and hardware,and the self-locking torque air gap experiment was carried out by increasing or decreasing the number of shims.The research results show that when the number of permanent magnet pairs increases from 8 to 18,the minimum magnetic flux density in the effective working area increases by 103%.The difference between the finite element analysis results and the experimental values is within 15%,and the overall trend of the experimental values and the finite element analysis values is consistent.The self-locking torque gradually decreases with the increase of the air gap.The experimental results verify the reliability of the simulation results,and provide a basis for the overall analysis and optimization of the electromagnetic balance device.

关 键 词：高速电主轴 平衡头装置 磁通密度 气隙实验 自锁力矩 Ansoft-Maxwell 

分 类 号：TH113.1[机械工程—机械设计及理论] TG502.3[金属学及工艺—金属切削加工及机床]