振动磨中物料磨碎特性的单自由度试验研究  

Experimental Study to Single Freedom of Grinding Characteristic of Material inVibration Mill

作　　者：秦志英[1] 彭伟[1] 周春福[1] 

机构地区：[1]河北科技大学机械电子工程学院,河北石家庄050054

出　　处：《矿山机械》2007年第7期19-22,共4页Mining & Processing Equipment

基　　金：河北省自然科学基金资助项目(E2004000299)

摘　　要：将振动磨简化为一个单自由小球自由落体模型,并应用该模型进行了冲击破碎试验,测量非受限颗粒层冲击破碎时的接触力,并基于分段模型估计了接触参数。试验结果表明,有物料层的钢-物料层-钢冲击破碎,其恢复系数和接触刚度远小于无料层的钢-钢冲击,并随物料层厚度的增大而减小,但物料粒度的影响较小。该基础数据可用于振动磨的动力学分析和数值仿真计算,以指导振动磨的性能优化,具有十分重要的作用。Vibration mill was simplified as a free falling model of a ball with single freedom, by which the impact crushing experiment was conducted. In the experiment, contact force of unconfined particle layer in the impact crushing course was measured and the contact parameters were estimated based on bilinear contact model. The experiment result showed that the coefficient of restitution and contact stiffness of steel with material layer was much less that that of steel without material layer and decreased as the increase of thickness of material layer, but had little relation with panicle granularity. These basic data can be applied for the kinetic analysis and numerical simulation to vibration mill so as to guide the performance optimization, which has significant sense. [ Descriptors ] Vibration mill Impact crushing Material layer Contact parameter Model estimation

关 键 词：振动磨 冲击破碎 物料层 接触参数 模型估计 

分 类 号：TD453[矿业工程—矿山机电]