摘要
卧式砂磨机在研磨时,被磨物料在分散盘与研磨内筒之间的间隙之间运动,通过与研磨介质、分散盘、研磨内筒之间产生高速的碰撞、挤压从而产生破碎。基于离散元法对砂磨机的研磨破碎颗粒过程进行数值仿真,讨论分散盘转速以及研磨介质球大小对破碎效率的影响,并进行正交试验和极差分析。经分析表明:转速对研磨破碎效果更大,随着转速上升,颗粒破碎效果也随之上升,但当转速达到一定的值后,其提升效果将不再明显;选用了几种不同的研磨介质球粒径,当粒径为4.5 mm时的表现最优。考虑到系统的稳定性以及加工成本,经过交叉试验得出最优参数为选取4.5 mm氧化锆珠球、分散盘转速600 r/min,为提高卧式砂磨机生产效率提出一定的参考依据。
With the horizontal sand mill as the research object,the material to be ground moves between the gap between the dispersion plate and the grinding inner cylinder,and is crushed by high-speed collision and extrusion with the grinding medium,dispersion plate and the grinding inner cylinder.Based on the discrete element method,the numerical simulation of the grinding and particle crushing process of the sand mill was carried out.The influence of the rotational speed of the dispersion disc and the size of the grinding medium ball on the crushing efficiency was discussed,and the orthogonal test and range analysis were carried out.The analysis showed that the rotating speed had a greater effect on grinding and crushing,and the particle crushing effect also increased with the increase of rotating speed,but when the rotating speed reached a certain value,the improvement effect would not be obvious.Several different ball sizes of grinding media were selected,and the performance was optimal when the particle size was 4.5 mm.Considering the stability of the system and the processing cost,the 4.5 mm zirconia ball was selected and the speed of the dispersion disc was 600 r/min through cross test,which provided a reference for improving the efficiency of the horizontal sand mill.
作者
吴德意
胡成武
孙晓
谢元斌
于柳
雷张文
Wu Deyi;Hu Chengwu;Sun Xiao;Xie Yuanbin;Yu Liu;Lei Zhangwen(College of Mechanical Engineering,Hunan University of Technology,Zhuzhou,Hunan 412007,China;Hunan Ouhua Technology Co.,Ltd.,Zhuzhou,Hunan 412007,China;Zhuzhou Guochuang Rail Technology Co.,Ltd.,Zhuzhou,Hunan 412005,China)
出处
《机电工程技术》
2023年第2期55-58,共4页
Mechanical & Electrical Engineering Technology
基金
湖南省2020年度自然科学基金省市联合基金资助项目(编号:2020JJ6078)
湖南省2021年度自然科学基金省市联合基金资助项目(编号:2021JJ50053)。
关键词
卧式砂磨机
破碎
颗粒替换
黏结模型
horizontal sand mill
fracture
particle replacement
bond mod
