Separation and cleaning of Leymus chinensis seed threshing material based on gas-solid coupling  

作　　者：Zongyu Ma Qihao Wan Weiwei Liu Yingzhong Zhang Ku Bu Wenliang Du 

机构地区：[1]School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China [2]Institute of Grassland Research,Chinese Academy of Agricultural Sciences,Hohhot 010010,China [3]College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第5期283-290,共8页国际农业与生物工程学报（英文）

基　　金：supported by the Science and Technology Major Special Projects of Inner Mongolia Autonomous Region(Grant No.2020ZD0002);Key Research and Achievements Transformation Plan Project of Inner Mongolia Autonomous Region(Grant No.2022YFHH0053);the Inner Mongolia Autonomous Region Natural Science Foundation(Grant No.2023MS03013).

摘　　要：The aim of this study was to improve the cleaning performance of the Leymus chinensis seed threshing material separation and cleaning device,and to clarify the movement law and characteristics of the Leymus chinensis seed threshing material during the cleaning process.A numerical simulation of the separation and cleaning process of Leymus chinensis seed threshing material was performed using the computational fluid dynamics discrete element approach.According to the streamline distribution of the gas-solid coupling,the movement of Leymus chinensis seeds during the cleaning process was examined.Additionally,the average speed and quantity of Leymus chinensis seed threshing material in different separation and cleaning zones were studied over time.Meanwhile,the distribution principle of the threshing material was obtained,and a verification test of the under-sieve distribution was conducted.The test results showed that the numerical simulation was consistent with the distribution trend of the under-sieve.The cleaning performance verification test showed that the impurity content and the loss rate of the separation and cleaning device were 27.3%and 3.3%,where the test results,compared with those of the numerical simulation,showed a reduction of 1.5%and 0.8%,respectively.It is feasible to apply the theory and method of gas-solid coupling to simulate the separation and cleaning process of Leymus chinensis seeds.

关 键 词：cleaning performance gas-solid coupling Leymus chinensis seeds numerical simulation separation and cleaning 

分 类 号：S37[农业科学—农产品加工]