轻工机械2018，Vol.36Issue(2)：36-40,5.DOI:10.3969/j.issn.1005-2895.2018.02.007
振动研磨机颗粒系统的仿真试验
Simulation Analysis and Study on Particle System of Vibration Smashing Mill
摘要
Abstract
In order to explore the optimum parameters of eccentric vibration grinding,improve the grinding efficiency and diminish the deficiency area in the center of the cylinder,single-tube eccentric vibration mill was studied as the research object to build the mathematical model of internal medium motion.The motion state of the grinding media and materials under different combination of amplitude and exciting frequency was simulated by particle system analysis software EDEM based on discrete element theory.Theoretical and experimental results show that the main body vibrates continuously with high frequency on the simple harmonic exciting force and the medium has a definite dynamic rotation center in the grinding cavity,which varies with the amplitude and exciting frequency.In the mixing process of grinding medium and material, the mixing speed increases with the larger amplitude.However, when the amplitude gets too large,part of the material is thrown to the edge of the mill,which reduces the mixing uniformity.When the amplitude reaches 10 mm and the exciting frequency remains at 16 Hz, the range of medium motion is larger and the deficiency area gets smaller.Meanwhile,under this condition,the tangential force between grinding medium and material increases significantly.This will contribute much to the efficiency of smashing.Therefore,the effect and efficiency of grinding can be improved by controlling the parameters of exciting frequency and amplitude.关键词
偏心振动磨/离散元素法/振幅/激振频率/运动轨迹Key words
eccentric vibration mill/DEM(discrete element method)/amplitude/exciting frequency/movement locus分类
矿业与冶金引用本文复制引用
李梦月,徐波,李生娟..振动研磨机颗粒系统的仿真试验[J].轻工机械,2018,36(2):36-40,5.基金项目
国家自然科学基金资助项目(51402192). （51402192）
