Analysis of the metering performance for typical shape maize seeds using DEM  

作　　者：Linrong Shi Wuyun Zhao Wei Sun Xiaoping Yang Guanping Wang Shanglong Xin 

机构地区：[1]College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou 730070,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第1期26-35,共10页国际农业与生物工程学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52065004,52165028);Special Talent of Gansu Agricultural University(Grant No.GAU-KYQD-2020-15,GAU-KYQD-2020-33).

摘　　要：The irregular shape,varying internal compositions,and uneven distributions of maize seeds can degrade the metering performance of maize seeders.This study investigates the effect of irregular maize on the performance of a high-filling-rate seed metering device using DEM.The results show that the seed population in the seed box formed large and small cycles of seed transport due to the disturbances caused by the three wheels.The increasing angular speed of the three wheels reduced the rate of seed filling in the seed filling regions by gravity and disturbances.In addition,an analysis of the repose angle formed by the dropped seed indicated that the angular speed of the taking seed wheel has a certain effect.The large angular speed reduced the coefficient of variation of the seed drop location.The repose angle of the horse tooth seed was greater than those of the other.Meanwhile,the irregular maize seed can also reduce the coefficient of variation of the seed drop location.A comparison between the simulation and experiment results indicates the number of metering seed were basically the same.

关 键 词：maize seeds seed metering performance DEM verification 

分 类 号：S223.2[农业科学—农业机械化工程]