大米滚筒分级机筛分过程的动力学模拟与筛分效果分析  

Dynamics Simulation and Screening Effect Analysis of Rice Cylinder Separator Screening

作　　者：郭璇 武鑫 甯尤军[1] 曾乙伦 GUO Xuan;WU Xin;NING Youjun;ZENG Yilun(School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang Sichuan 621010,)

机构地区：[1]西南科技大学制造科学与工程学院

出　　处：《机械设计与研究》2018年第4期160-164,共5页Machine Design And Research

基　　金：四川省科技技术厅科技计划应用基础研究项目(2017JY0128);西南科技大学研究生创新基金项目(17YCX131)

摘　　要：大米滚筒分级机的设计和工作参数影响筛分效率和精度。采用非连续变形分析（DDA）方法对大米滚筒分级机进行动力学筛分过程模拟,探讨筛分分级机理和筛分参数影响问题。通过模拟研究了收集槽设计参数、米粒与窝眼的匹配关系对筛分比及槽内筛分精度的影响;研究了滚筒内筛分米粒数量以及被筛分米粒尺寸级配对筛分结果的影响,发现适宜的筒内米粒数量及米粒尺寸级配能提高筛分效率及筛分精度。通过滚筒内筛分米粒的运动学和运动轨迹分析,探究了滚筒分级机的米粒分选过程和机理。本研究工作有助于对滚筒分级机分选过程与机理的认识,以及滚筒分级机参数的设计与优化。The design and working parameters of rice cylinder separator have a great influence on the screening efficiency and accuracy of rice particles. The present work applies the discontinuous deformation analysis（ DDA）method to conduct dynamics simulation of the screening process,so as to investigate the separating mechanism and the influence of the screening parameters. Through numerical simulations,design parameters of the collecting tank and the size matching relationship between the rice particles and the cylinder indent are explored,and the influence of the parameters and matching relationship on the screening efficiency and accuracy are investigated. Screening results of the different amount and size proportion of rice are also obtained. The results show that optimized quantity and size proportion of rice can improve the screening efficiency and accuracy. The analysis of the kinematics and trajectories of the rice particles in the screening process is conducted as well,and thus the process and mechanism of the rice screening separation are studied. This research is beneficial for the understanding of the screening process and mechanism,and contributes to the parameter design and optimization of cylinder separators.

关 键 词：大米滚筒分级机 筛分 动力学模拟 DDA 

分 类 号：TH12[机械工程—机械设计及理论]