Numerical simulation of particle motion at cucumber straw grinding process based on EDEM  

作　　者：Yunfeng Xu Xiliang Zhang Shuo Wu Cheng Chen Jizhang Wang Shouqi Yuan Bin Chen Pingping Li Rongjun Xu 

机构地区：[1]National Research Center of Pumps,Jiangsu University,Zhenjiang 212013,Jiangsu,China [2]Lanshen Group Co.,Ltd.,Nanjing 211500,China [3]School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China [4]Key Laboratory of Modern Agricultural Equipment and Technology,Ministry of Education and Jiangsu Province,Jiangsu University,Zhenjiang 212013,Jiangsu,China [5]College of Biology and Environment,Nanjing Forestry University,Nanjing 210037,China

出　　处：《International Journal of Agricultural and Biological Engineering》2020年第6期227-235,共9页国际农业与生物工程学报（英文）

基　　金：This work was supported by the National Key Technologies R&D Program of China(No.2014BAD08B04);and the National Natural Science Fund of China(No.51175230,No.51475212);and the Funding for Key R&D Programs in Jiangsu Province(BE2018321).

摘　　要：Simulation of straw grinding process based on discrete element method(DEM)was proposed.According to the force analysis and kinematics analysis,the differential equation of straw particle motion on hammers was deduced,and the formation mechanism of the material circulation layer was obtained.Geometric model of grinder,particle model and contact model were established by EDEM software.The influence of hammer number,hammer thickness and gap of the hammer-sieve on particle grinding number and power consumption were obtained by single factor simulation test.The grinding process is divided into three stages.The hammer smashing plays a dominant role in 0-0.25 s.While the hammer smashing particle number increases slowly and then decreases to the lowest level in 0.25-0.60 s,the tooth plate smashing particle number increases rapidly and dominates,and then forming a material circulation layer.The hammer and tooth plate smashing particle number is basically stable in 0.60-2.00 s,and the tooth plate smashing occupies the dominant position.With the increase of the number and thickness of hammers,the power consumption of crusher tends to increase,and with the increase of the gap between hammers and sieves,the power consumption of crusher decreases first and then increases.The results can provide guidance for the development of high-efficiency and energy-saving grinding equipment for cucumber straw.

关 键 词：cucumber straw grinding process particle motion numerical simulation EDEM 

分 类 号：P46[天文地球—大气科学及气象学]