(中南大学 资源加工与生物工程学院，长沙 410083)
摘 要: 利用ANSYS软件中的电磁场分析模块，分别采用plane13和plane53磁结构单元对履带式永磁磁选机的平面N-S交替排列磁系进行模型构建和网格划分，对磁系的磁场特征进行仿真和分析，并通过理论公式计算分析两种磁结构单元的仿真误差。结果表明：磁场仿真时，靠近磁极表面处磁感应强度误差较小，随着距磁极表面距离的增大，磁感强度的误差逐渐增大。plane53磁单元的磁场仿真结果较plane13的更加准确，磁极表面的磁感强度与理论计算的相对误差为2.08%；在距离磁极表面0.5cm以内，磁感强度的相对误差平均为6.72%，其误差范围可以满足履带式永磁磁选机设计的要求，因此，可以采用ANSYS电磁场分析模块中的plane53磁结构单元进行履带式永磁磁选机磁系设计。
关键字: 永磁磁选机；磁系；ANSYS软件；模拟；相对误差
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:By the electromagnetic field analysis module in ANSYS software, the plane13 and plane53 magnetic structure units were, respectively, used to build model and generate mesh on the planar N-S arranged alternatively magnetic system of tracked permanent magnetic separator, the magnetic field distribution of the magnetic system was simulated. Then, the simulation errors of plane13 and plane53 were calculated through theoretical formula. The results indicate that the simulation error is small near the magnetic pole surface, and increases with the increase of distance to magnetic pole surface. The magnetic intensity simulation result of plane53 is more accurate than that of plane13. Comparing simulation results with the theory results, the relative error on magnetic pole surface is only 2.08% using plane53, and the average relative error is 6.72% within 0.5 cm of magnetic pole surface. Obviously, this error band can meet the demand of the tracked permanent magnetic separator design, so, plane53 can be used to design magnetic system of the tracked permanent magnetic separator.
Key words: permanent magnetic separator; magnetic system; ANSYS software; simulation; relative error
