基于离散元法的振动筛的筛分效率研究  

The study of vibrating screen efficiency based on discrete element method

作　　者：刘义伦[1,2] 苏家辉 赵先琼 陈辉[1] 刘驰[1] 刘思琪 伍天翔 LIU Yi-lun;SU Jia-hui;ZHAO Xian-qiong;CHEN Hui;LIU Chi;LIU Si-qi;WU Tian-xiang(College of Mechanic and Electronic Engineering,Central South University,Changsha 410083,China;Light Alloy Research Institute,Central South University,Changsha 410083,China)

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]中南大学轻合金研究院,湖南长沙410083

出　　处：《东北师大学报（自然科学版）》2018年第4期78-83,共6页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51374241);长沙市科技计划重点项目(k1508090-11)

摘　　要：针对双层直线振动筛筛分工况对物料运动规律的影响不明,导致筛分机工作效率低,筛分耗时长,筛分质量差等问题,采用离散元法模拟了不同粒级颗粒在不同振幅、振动方向角、筛面倾角条件下的筛分过程.结果表明:颗粒运动速度随着振幅和筛面倾角的增大而加快.振幅越小,越有利于小颗粒筛分;当A=4mm,α=30°,β=16°时,各粒级颗粒同时达到较高筛分效率.For the influence of screening conditions of double-deck linear vibrating screen on motion regularity of the material is indefinite,which leads to problems of low screening efficiency,poor screening quality and time-consuming of double-deck linear vibrating screen machine,authors simulated the screening process of different granularities of particles with varied amplitude,excitation angle and mesh slope based on DEM.The results showed that,particle velocity speed up with the increase of amplitude and mesh slope.It is benefit for screening of small particles with lower amplitude.Different granularities of particles achieve higher screening efficiency with A=4 mm,α=30°,β=16°.It is stable that the sort of efficiency of different granularities of particles under different parameters.

关 键 词：离散元法 振动筛 颗粒 粒度 筛分效率 

分 类 号：TH692.9[机械工程—机械制造及自动化]