基于EDEM的双排型孔轮式油菜排种器的排种性能分析  

Seeding performance of double hole-wheel seedmeter for rapeseed based on EDEM

作　　者：刘亚夫 吴志立[1,2,3] 聂也之 刘扶贫 吴明亮 LIU Yafu;WU Zhili;NIE Yezhi;LIU Fupin;WU Mingliang(College of Engineering,Hunan Agricultural University,Changsha,Hunan 410128,China;Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China,Changsha,Hunan 410128,China;Hunan Provincial Engineering Technology Research Center for Modern Agricultural Equipment,Changsha,Hunan 410128,China)

机构地区：[1]湖南农业大学工学院,湖南长沙410128 [2]南方粮油作物协同创新中心,湖南长沙410128 [3]湖南现代农业装备工程技术研究中心,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2019年第5期554-559,共6页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科学技术厅重点研发计划项目(2017NK2131);湖南省教育厅重点项目(18A106)

摘　　要：基于离散单元法和EDEM软件,建立了双排型孔轮式油菜排种器的离散元模型,对不同排种轴转速下种群扰动强度进行分析,研究排种轴转速和不同排型孔对排种器排种量和排种均匀性变异系数的影响。结果表明:当排种轴转速为30~90 r/min时,单独使用第一排型孔排种,排种均匀性变异系数为42.75%~54.17%,单独使用第二排型孔排种,排种均匀性变异系数为38.46%~44.1%;排种器使用双排型孔同时排种,排种均匀性变异系数为28.2%~40.1%,双排型孔工作较单排型孔工作排种均匀性提高。该排种器种子充入型孔的极限转速为60 r/min,当转速为0~60 r/min时,单位时间的排种量呈线性变化,当排种器转速超过极限转速时,单位时间的排量相对减小。Based on discrete element method and EDEM software,the discrete element model of double hole-wheel seedmeter for rapeseed was established to analysis the population disturbance intensity at different rotating speeds.The effects of rotating speed and the hole row number on the performance of the hole-wheel seedmeter for rapeseed.When the rotating speed is 40-90 r/min,the variation coefficient of seeding uniformity is 42.75%-54.17%with the first row hole,and 38.46%-44.1%with the second row hole.When the seedmeter works simultaneously with the both row holes,the variation coefficient of seeding uniformity can be effectively reduced to 28.2%-40.1%.The limit rotating speed of seeding is 60 r/min.Under the rotating speed of 0-60 r/min,the seeding quantity changes linearly dependent on the rotating speed.When the rotating speed is over 60 r/min,the seeding quantity was relatively decreased.

关 键 词：双排型孔轮式油菜排种器 离散元 极限转速 排种量 排种均匀性变异系数 

分 类 号：S223.25[农业科学—农业机械化工程]