基于三维离散元法的等厚筛虚拟筛分  

Virtual screening of a banana screen based on the 3D discrete element method

作　　者：王宏[1] 李珺[1] 江海深[2] 赵杰[2] 彭利平[1] 

机构地区：[1]中国矿业大学机电工程学院,徐州221116 [2]中国矿业大学化工学院,徐州221116

出　　处：《北京科技大学学报》2014年第12期1583-1588,共6页Journal of University of Science and Technology Beijing

基　　金：高等学校博士学科点专项科研基金(博士生导师类)资助项目(20120095110001)

摘　　要：基于三维离散元法,建立了等厚筛离散元模型.对于粒度为0.8倍筛孔直径的难筛颗粒进行了虚拟实验研究,得到了颗粒分层和透筛状态下的颗粒群分布状态.在此基础上分别研究了等厚筛筛面倾角、振动方向角和振动强度对于该模型筛分效果的影响规律.实验结果表明:总体上随振动强度的增大,筛分效果降低,筛分完成时间缩短.当筛面倾角为0.5°、振动方向角为45°以及振动强度为3.5时,该等厚筛具有最佳的筛分效果,筛分效率为92.2%,筛分完成时间为9.95 s.A discrete element model of a banana screen was established based on the 3D discrete element method. Virtual experiments were performed on difficult-screening particles with 0. 8 times the diameter of the screen aperture,and the particle distribution under the state of particle stratification and penetration was obtained. The dependences of the screening effect of the model upon the screen inclination angle,vibrating angle and vibrating intensity were also discussed. As the vibrating intensity increases,the screening efficiency and the screening completion time decrease. When the screen inclination angle is 0. 5°,the vibrating angle is 45° and the vibrating intensity is 3. 5,the screen has the best screening effect,in which the screening efficiency is 92. 2% and the screening complete time is 9. 95 s.

关 键 词：等厚筛 虚拟实验 筛分 离散元 

分 类 号：TD452[矿业工程—矿山机电]