基于EDEM的小型立式粉碎机粉碎刀具优化与研究

摘要

[目的]提高小型立式粉碎机的粉碎性能。[方法]对小型立式粉碎机、大豆进行实体测量，建立其EDEM模型，提出粉碎刀具的优化方案，以仿真时间1．01～1．10 s内颗粒的旋转动能均值、碰撞次数总和作为评价指标，对比优化前后的粉碎刀具性能，并重复3次仿真试验，验证优化的正确性。[结果]优化后粉碎机内颗粒的旋转动能均值、碰撞次数总和均大于原始粉碎机内颗粒，其颗粒旋转动能均值最大值为0．0077 J，碰撞次数总和最大值为738次。[结论]优化后粉碎刀具性能明显优于优化前粉碎刀具性能，该研究可为其他粉碎机粉碎刀具的改进提供理论参考。%Objective] To improve the crushing performance of small vertical crusher .[ Method] Small vertical mill and soybean were physi-cally measured so as to establish EDEM model.The optimization scheme of tool grinding was proposed.With the mean of rotational kinetic en-ergy of 1.01-1.10 s particles and the collision number sum as the indexes, grinding tool performance was compared before and after optimiza-tion.Simulation experiment was carried out for three times;and the correctness of optimization was verified.[Result] After optimization, the mean of rotational kinetic energy of 1.01-1.10 s particles and the collision number sum were both greater than those of particles in the origi-nal mill.The mean maximum of particle rotational kinetic energy was 0.007 7 J; the maximum value of the sum of collision times reached 738.[Conclusion] After optimization, the performance of the grinding tool is obviously better than that of the former.This research provides theoretical references for the improvement of the grinding tool.