基于EDEM的木质纤维板铺装装置结构优化  

Structure optimization of wood fiber paving device based on EDEM

作　　者：詹璐歆 贺福强[1] 陈发江 田祥州 黄易周 ZHAN Luxin;HE Fuqiang;CHEN Fajiang;TIAN Xiangzhou;HUANG Yizhou(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China;Guizhou Jingmu Building Materials Co.,Ltd.,Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州晶木建材有限公司,贵州贵阳550025

出　　处：《中国粉体技术》2023年第3期63-71,共9页China Powder Science and Technology

基　　金：贵州省科技计划项目,编号:[2020]2Y067。

摘　　要：高密度木质纤维板生产加工中,产品在铺装时会有凹凸不平、边缘塌陷、物料团聚等问题,因此造成后续压制成型的板材质量不达标,企业生产效率低下。为了改善企业加工板材铺装时颗粒的混合均匀程度,降低产品报废率,增强成板强度,提高生产效率和加工质量,采用离散元仿真方法,以铺装装置为载体,通过分别改变滚齿安装高度差、滚齿上梳齿密度和滚齿个数3个单一变量进行仿真,观察物料动态铺装效果,优化铺装装置结构参数。结果表明,当滚齿安装高度差为123 mm,梳齿齿数为25齿,滚齿个数为6个时,铺装效果最好。通过力学试验验证,仿真铺装效果好坏与板材的抗压强度相对应,铺装装置通过结构优化后生产的板材强度最高可达到21 MPa,弹性模量最高可到6523.22 Pa。In the production and processing of high-density wood-based fiberboards,there are problems such as unevenness,edge collapse,and material agglomeration during the laying,which result in substandard quality of the board after subsequent pressing and molding,and low production efficiency for enterprises.In order to improve the uniformity of particle mixing during the laying of the board,reduce the scrap rate of products,enhance the strength of the board,and improve production efficiency and processing quality,the discrete element simulation method is adopted,taking the laying device as the carrier,and simulating by changing three single variables,respectively,the height difference of the roller installation,the density of the comb teeth on the roller,and the number of rollers.Observing the dynamic laying effect of the material,optimizing the structural parameters of the laying device.The results show that when the height difference of the roller installation is 123 mm,the comb tooth number is 25,and the number of rollers is 6,the laying effect is the best.Through mechanical testing,it is verified that the simulation laying effect corresponds to the compressive strength of the board.After structural optimization,the strength of the board produced by the laying device can reach the highest 21 MPa,and the elastic modulus can reach the highest 6523.22 Pa.

关 键 词：离散元仿真 铺装装置 结构优化 

分 类 号：TU7[建筑科学—建筑技术科学]