Halbach阵列磁力联轴器传动转矩的数值计算  

Numerical calculation of transmission torque of magnetic coupling based on Halbach array

作　　者：袁丹青[1] 李建萍[1] 张贺[1] 何有泉[1] 白滨[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《排灌机械工程学报》2011年第3期209-213,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(50776040)

摘　　要：为提高磁力泵磁力联轴器的传动转矩,对Halbach阵列的特点和制造方法进行阐述,并分析了Halbach阵列的磁场分布情况及磁体的磁化规律.基于ANSYS求解磁传动转矩的基本原理,应用ANSYS软件对24极式Halbach型磁力联轴器的气隙磁场进行有限元分析,研究转角差、气隙厚度、永磁体厚度以及轭铁厚度对磁力联轴器传动转矩的影响.计算结果表明:Halbach型磁力联轴器的传动转矩随转角差呈正弦周期性变化,且在转角差为磁极张角一半时取得最大值;在满足结构要求的前提下应尽量减小工作气隙厚度以提高其传动转矩;随着永磁体厚度的增大,其传动转矩值变化较大且在使用较大尺寸永磁体时更能充分体现Halbach阵列的单边聚磁特性;随着轭铁厚度的增大,传动转矩呈下降趋势但影响很小,因此,在设计Halbach型磁力联轴器时可以取消轭铁结构以降低转动惯量,从而增强联轴器的传动性能.In order to improve the transmission torque of magnetic coupling of a magnetic pump,the characteristics and fabrication methods of Halbach array were introduced,and the magnetization law and distribution of the magnetic field of Halbach array were analyzed.Based on the basic principles of using ANSYS to solve the magnetic drive torque problems,the air-gap magnetic field of 24-pole Halbach magnetic coupling was finite element analyzed by ANSYS software.The change of torque of Halbach magnetic couplings with angle deviation,air gaps,thickness of permanent magnets and yoke irons were studied,respectively.The calculation results show that the relationship between drive torque of Halbach and angular deviation is sin-periodic,and the drive torque is maximum when the angular is half of the opening-angle of magnetic pole.In order to improve the drive torque,the air-gap thickness should be minimized so as to meet the requirements of structure.With the increasing of the permanent magnet thickness,there is a great change of the drive torque and the properties of Halbach array were fully reflected when using larger permanent magnet.The drive torque shows a downward trend with increasing of the yoke thickness,but the effect is very small.So in order to reduce the inertia moment and enhance the transmission performance,the yoke structure can be canceled in the design of Halbach magnetic coupling.

关 键 词：磁力泵 磁力联轴器 HALBACH阵列 传动转矩 数值计算 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]