期刊论文

中文

农机化研究

1003-188X

2015

10

34-39

10.3969/j.issn.1003-188X.2015.10.008

(2010BAD01B06，2011BAD20B08):“十二五”国家科技支撑计划项目 (CARS－13):现代农业产业技术体系建设专项 (2011GB2D200001):国家农业科技成果转化资金项目 (湘府阅[2014]35号):湖南省政府重大专项

本校为第一机构

为探明偏心型孔轮式排种器适宜的工作转速、降低试验成本，建立型孔轮式排种器的离散元模型，对5种型孔轮转速下排种器中油菜籽的运动过程进行仿真分析。同时，录制籽粒囊种－清种－护种－投种的运动轨迹，探究种子箱中活动籽粒的分布规律，研究排种器的排量、排种均匀性、各行排量一致性和型孔轮转速之间的关系。仿真结果表明：型孔轮搅动的籽粒主要集中在靠近型孔轮表面的内面3层；排种器每分钟的排种量随着转速的增大而增大，单圈排种量随着转速的增加反而减小；型孔轮转速为20～60r m／in 时，排种均匀性变异系数为14％～31％，3行排种的一致性变异系数为2．94％～4．6％；转速超过80r／min...

In order to explore suitable working speed of the metering on hole-wheel seedmeter and reduce the test cost . The discrete element method ( DEM) simulation model of hole-wheel seedmete was established , and the simulation anal-ysis was conducted on the motion processes of rapeseeds by five kinds of speed hole -wheel .The movement locus of rape-seeds was videoed .The distribution law of activity seeds was determined , and it were respectively studied the relation-ships between the rotate speed of hole-wheel and seeding amount ,seeding uniformity and the consistency of total seeding amount in ea...