基于COMSOL的小型杀青机电磁加热模型研究  

Research on the Magnetic Heating Model of a Small Drying Machine Based on COMSOL

作　　者：何建民 艾青 王迎州 余加民 杜小飞 骆壮壮 He Jianmin;Ai Qing;Wang Yingzhou;Yu Jiamin;Du Xiaofei;Luo Zhuangzhuang(College of Intelligent System Science and Engineering,Hubei Minzu University,Enshi,Hubei 445000,China)

机构地区：[1]湖北民族大学智能科学与工程学院,湖北恩施445000

出　　处：《机电工程技术》2023年第8期43-48,共6页Mechanical & Electrical Engineering Technology

基　　金：湖北民族大学硒食品营养与健康智能技术湖北省工程研究中心开放课题(PT082103)。

摘　　要：针对传统大型电热式杀青机加热效果有待改善问题,设计一款电磁式小型滚筒杀青机。首先以电磁场理论为基础,利用有限元仿真软件COMSOL,建立杀青机滚筒模型,研究滚筒在不同电流大小和通电线圈频率下的电磁特性和感应效果。然后在给定电流频率下,分析滚筒表面平均温度与电感电流的关系,仿真结果表明,影响加热效率的最主要因素为通电线圈电流大小,其次为线圈间距、线圈距滚筒的距离、电流频率,为感应加热系统的电源选择提供了依据。最后通过正交试验,确定杀青机电磁加热关键组合参数为电流200 A、线圈间距5 mm、线圈距滚筒5 mm、频率25 kHz,此时加热至200℃的时间为135 s,滚筒内外温差为0.49℃。研究结果可为小型化茶叶杀青机电磁感应加热系统设计提供实际工程应用指导。Aiming at the problem that the heating effect of traditional large electric thermal drying machine needs to be improved,a small electromagnetic drum drying machine is studied.Firstly,based on electromagnetic field theory and finite element simulation software COMSOL,the drum model of the drying machine is established to study the electromagnetic characteristics and induction heating effect of the drum under different current sizes and energized coil frequencies.Then,under the given current frequency,the relationship between the average temperature of the drum surface and the inductance current is analyzed.The simulation results show that the most important factors affecting the heating efficiency are the current of the electized coil,followed by the coil spacing,the distance between the coil and the drum,and the current frequency.It provides the basis for selecting the power supply of induction heating system.Finally,through the orthogonal test,it is determined that the key combination parameters of the magnetic heating machine are current 200 A,coil spacing 5 mm,coil distance 5 mm from the drum,and frequency 25 kHz.On these conditions,the heating time to 200℃is 135 s,and the temperature difference between inside and outside the drum is 0.49℃.The research results provide practical engineering guidance for the design of miniaturized electromechanical magnetic induction heating system for teadrying machine.

关 键 词：小型滚筒杀青机 电磁感应加热 COMSOL 电磁特性 正交试验 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]