基于离散元法的振动筛颗粒触筛和透筛分析  

Analysis on particles screen contact and penetration of vibration screen based on discrete element method

作　　者：赵嘉乐 童昕[1,2] 李占福[2,3] 崔德海 ZHAO Jiale;TONG Xin;LI Zhanfu;CUI Dehai(Colleg of Mechanical Engineering and Automation,HuaQiao University,Xiamen 361021,China;Fujian Province CNC Equipment Industry Research Institute,Fujian University of Technology,Fuzhou 350118,China;CSCEC Strait Construction and Development Co.,Ltd.,Fuzhou 350000,China)

机构地区：[1]华侨大学机电及自动化学院,福建厦门361021 [2]福建工程学院福建省数控装备产业研究院,福建福州350118 [3]中建海峡建设发展有限公司,福建福州350000

出　　处：《中国粉体技术》2022年第4期125-133,共9页China Powder Science and Technology

基　　金：福建省自然科学基金项目,编号:2020J01870。

摘　　要：为了提高振动筛的筛分效率,采用离散元法对振动筛的筛分过程进行仿真模拟,分析筛分过程中颗粒触筛与透筛概率对筛分效率的影响,利用随机森林算法建立了筛机参数与颗粒触筛、透筛概率的数据模型,分析各筛机参数对颗粒触筛、透筛概率的影响权重及规律,结果表明:颗粒触筛概率主要受振动频率、振动幅度和振动方向角的影响;颗粒透筛概率主要受筛网倾角及筛孔孔径的影响。利用布谷鸟寻优算法进行参数优化,寻优得到振动频率为15 Hz,振动幅度为2 mm,振动方向角为50°,筛网倾角为20°,筛网长度为160 mm,筛孔孔径为1.0 mm,筛丝直径为0.7 mm为筛机参数的最优组合参数。In order to improve the screening efficiency of the vibrating screen, the discrete element method was used to simulate the screening process of vibrating screen, and analyzed the impact of the particle contact probability and particle penetration probability on screening efficiency. The data model of sieve machine parameters and particle contact probability and particle penetration probability was established by random forest algorithm, and analyzed the weight and rule of the influence of the parameters of each vibration screen parameters on the particle contact probability and particle penetration probability. The results show that the particle contact probability is mainly influenced by vibration frequency, vibration amplitude and vibration direction angle. The particle penetration probability is mainly influenced by screen inclination angle and screen aperture size. The cuckoo search algorithm was used to optimized parameters, and the optimal combination of vibrating screen parameters is obtained as follows that vibration frequency is 15 Hz, vibration amplitude is 2 mm, vibration direction angle is 50°, screen inclination angle is 20°, screen length is 160 mm, screen aperture size is 1.0 mm, and screen wire diameter is 0.7 mm.

关 键 词：离散元法 触筛概率 透筛概率 随机森林算法 参数优化 

分 类 号：TD452[矿业工程—矿山机电]