新型振动筛松散机理  

Research on Loose Mechanism Over a New Vibrating Screen

作　　者：周碧[1] 童昕[1] 李占福[1] 仇云飞 

机构地区：[1]华侨大学机电及其自动化学院,厦门361021

出　　处：《机械设计与研究》2016年第3期149-153,161,共6页Machine Design And Research

基　　金：国家自然科学基金资助项目(51175190);福建省科技重大专项专题(2006HZ0002-2)

摘　　要：振动筛是工业中应用最广泛的筛分机械。提高振动筛的筛分性能关键在于筛分理论研究的突破。松散是筛分理论研究中一个重要部分。首次提出和探索振动形式为平动与摆动复合的新型振动筛。应用离散单元法(DEM)建立新型振动筛EDEM软件数值模型并仿真实验,定义松散特征量(松散系数、松散速率)做定量研究,建立振动参数(摆动角度、摆动频率、平动振幅、平动频率、振动方向角)与平均松散速率的数学模型。该结果为进一步研究筛分理论奠定了基础,为新型振动筛的开发提供了理论依据。Vibrating screens are used extensively in the process of separation. Better understanding the loose mechanism which is an important part of such process is critical in optimizing screen activities. A new vibrating screen which is vibrated by the superposition motion of translation and swing is first proposed in this paper. The 3D model of the new screen is created by using discrete dement mode （DEM）. In order to quantitative study the effects of vibration parameters on loose mechanism over the new screen, the characteristic quantity of loose： loose coefficient and loose velocity are defined. The result above has laid the foundation for further research of the screening theory, and provided the theoretic foundation for the manufacture of the new screen.

关 键 词：新型振动筛 离散单元法 松散机理 

分 类 号：TH452[机械工程—机械制造及自动化]