(中南大學 資源加工與生物工程學院，長沙 410083)
摘 要: 利用ANSYS軟件中的電磁場分析模塊，分別采用plane13和plane53磁結構單元對履帶式永磁磁選機的平面N-S交替排列磁系進行模型構建和網(wǎng)格劃分，對磁系的磁場特征進行仿真和分析，并通過理論公式計算分析兩種磁結構單元的仿真誤差。結果表明：磁場仿真時，靠近磁極表面處磁感應強度誤差較小，隨著距磁極表面距離的增大，磁感強度的誤差逐漸增大。plane53磁單元的磁場仿真結果較plane13的更加準確，磁極表面的磁感強度與理論計算的相對誤差為2.08%；在距離磁極表面0.5cm以內(nèi)，磁感強度的相對誤差平均為6.72%，其誤差范圍可以滿足履帶式永磁磁選機設計的要求，因此，可以采用ANSYS電磁場分析模塊中的plane53磁結構單元進行履帶式永磁磁選機磁系設計。
關鍵字: 永磁磁選機；磁系；ANSYS軟件；模擬；相對誤差
（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
