基于 Rocky Dem 的辊式制粉机磨辊结构优化  

Optimization of roll structure in rollermill based on Rocky Dem discrete element simulation

作　　者：李炎 张磊 LI Yan;ZHANG Lei(College of Mechanical Engineering,Yangtze University,Jingzhou,Hubei 434023,China;State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization,Wuhan,Hubei 430100,China)

机构地区：[1]长江大学机械工程学院,湖北荆州434023 [2]低碳催化与二氧化碳利用全国重点实验室(筹),湖北武汉430100

出　　处：《食品与机械》2024年第10期93-100,共8页Food and Machinery

基　　金：石油天然气装备教育部重点实验室开放基金(编号:OGE202303-21)。

摘　　要：[目的]设计一种辊式制粉机并对磨粉系统进行结构优化。[方法]利用Rocky Dem离散元方法以1~5 mm粒径数量来确定磨粉系统转速比、磨辊直径、齿顶宽、快辊转速等主要参数的结构范围。设计正交试验,建立仿真模型获得1~2,2~3,3~4,4~5 mm各区间粒径数量。使用层次分析法对4个区间指标赋予权值,通过优劣解距离法将4个指标融合成一个综合值作为判别试验结果的依据,并以此来衡量磨粉性能的好坏,直观分析得出最优结构。[结果]与初始结构相比,优化后磨粉细化颗粒数量增加10196,性能提升了14.2%。[结论]磨辊直径对磨粉效果的影响最大,最优结构为磨辊直径270 mm,快辊转速700 r/min,转速比2.7,齿顶宽1.2 mm。[Objective]Designed a roller mill and optimize the structure of the milling system.[Methods]Using the Rocky DEM discrete element method,determined the structural range of key parameters such as the speed ratio of the milling system,roller diameter,tooth top width,and fast roller speed based on the particle size quantity of 1~5 mm.Orthogonal experiments were designed,and the particle numbers in each interval of 1~2,2~3,3~4,and 4~5 mm were obtained by simulation models.The four interval indicators were assigned to the weight using hierarchical analysis.Further the four indicators were integrated into a comprehensive value as the basis for judging the experimental results through TOPSIS.The grinding performance was measured in terms of the comprehensive value and the optimal structure was analyzed visually.[Results]Compared with the initial structure,the number of grinding refined particles increased by 10196,and the performance of scratch system improved by 14.2%.[Conclusion]The diameter of the grinding roller has the most significant impact on the grinding effect.The optimal structure for the rollermill includes a grinding roller diameter of 270 mm,a fast roller speed of 700 r/min,a speed ratio of 2.7,and a tooth top width of 1.2 mm.

关 键 词：辊式制粉机 磨辊 结构优化 离散元仿真 正交试验 

分 类 号：TS210.3[轻工技术与工程—粮食、油脂及植物蛋白工程]