基于三维离散元法的等厚筛筛分效率模拟研究  

Simulation study on screening efficiency of banana vibrating screen based on 3D discrete element method

作　　者：江海深[1] 赵跃民[1] 段晨龙[1] 李珺[2] 周恩会[1] 

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

出　　处：《矿山机械》2013年第11期103-107,共5页Mining & Processing Equipment

基　　金：国家大学生创业训练项目(201310290074);国家自然科学基金创新研究群体项目(51221462);江苏省自然科学基金(BK2012136)

摘　　要：基于三维离散元法对等厚筛筛分过程进行了模拟试验，采用Design—Expert软件进行了试验设计和数据处理，分析了筛分效率的影响因素及各因素之间的关系。结果表明，筛分效率在72．6％～92．8％之间；筛分效率与排料端倾角、振动方向角、振动强度之间具有二次方相关关系；当确定其中两个因素，另一因素在给定范围变化时，筛分效率随排料端倾角增大而减小，随振动方向角增大而增大，随振动强度的增大而减小；各因素对筛分效率的影响强度依次为排料端倾角、振动强度、振动方向角；排料端倾角、振动方向角、振动强度之间的交互作用，对筛分效率的影响强度依次为排料端倾角X振动强度、振动方向角X振动强度、排料端倾角X振动方向角。The screening process of a banana vibrating screen was simulated by using 3D discrete element method. Test design and data processing were performed by using Design-Expert software. The influential factors of screening efficiency and the relationship among all factors were analyzed. The results showed： the screening efficiency ranged from 72.6% to 92.8%; the relationship between discharge gradient, vibrating directional angle, vibration intensity and the screening efficiency was quadratic; while the values of two factors was determined and the rest factor varied in a given range, the screening efficiency decreased gradually with the increase in the discharge gradient or vibration intensity, the screening efficiency increased gradually with the increase in the vibrating directional angle; the affecting strength of various factors on the screening efficiency was in the following order： discharge gradient, vibration intensity, vibrating directional angle; the affecting strength of interaction between discharge gradient, vibrating directional angle and vibration intensity on the screening efficiency was in the following order： interaction between discharge gradient and vibration intensity, interaction between vibrating directional angle and vibration intensity, interaction between discharge gradient and vibrating directional angle.

关 键 词：等厚筛 离散元法 筛分效率 交互作用 

分 类 号：TD452[矿业工程—矿山机电]