摘要
文中针对斗轮堆取料机中料斗在挖取料过程中的磨损问题,采用离散元法(Discrete Element Method,DEM)描述颗粒物料运动,并通过Archard磨损模型预测料斗壁面磨损情况,分析了颗粒物料对料斗切向和法向累积的接触力,基于EDEM软件开展了料斗尺寸参数对磨损影响规律的仿真试验研究。结果表明,Relative Wear模型能够较好地反映斗轮堆取料机料斗的磨损规律;料斗的磨损量随斗壁倒角的减小呈上升趋势,在普通料斗上增加倒角,能够显著减小料斗的磨损量;料斗切向收缩角的最优选择要与实际工况相结合,选出最优切向收缩角为4°;在径向收缩角2°~10°范围内,料斗的磨损量随径向收缩角的增大呈减小趋势。
In this article,in order to explore the bucket wheel stacker-reclaimer’s hopper wear during the process of digging and reclaiming,the Discrete Element Method(DEM)is used to describe the movement of the granular materials.Then,the Archard wear model is adopted to predict the wear of the hopper wall;the cumulative tangential and normal contact forces of the granular materials on the hopper are also analyzed.Finally,the influence of the hopper’s geometry parameters on the wear is simulated with the help of EDEM.The results show that the Relative Wear model is desirable to describe the law of the bucket wheel stacker-reclaimer’s hopper wear;the hopper wear tends to increase as the hopper wall chamfer decreases,and adding the chamfer to the hopper can significantly reduce the hopper wear;the optimal choice of the tangential shrinkage angle of the hopper should be combined with the actual working conditions,and the tangential shrinkage angle of 4°is optimal;the hopper wear tends to decrease as the radial contraction angle increases with the radial contraction angle ranging from 2°to 10°.
作者
袁建明
蔡钰杨
胡志辉
叶方平
YUAN Jian-ming;CAI Yu-yang;HU Zhi-hui;Fang-ping(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063;School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068)
出处
《机械设计》
CSCD
北大核心
2022年第6期1-6,共6页
Journal of Machine Design
关键词
离散单元法(DEM)
仿真分析
斗轮堆取料机
料斗
磨损
Discrete Element Method(DEM)
simulation analysis
bucket wheel stacker-reclaimer
hopper
wear
