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作 者:杨文敏[1,2] 吴明亮[1,2] 何腾飞[1,2]
机构地区:[1]湖南农业大学工学院,长沙410128 [2]湖南省现代农业装备工程技术研究中心,长沙410128
出 处:《农机化研究》2015年第10期34-39,共6页Journal of Agricultural Mechanization Research
基 金:"十二五"国家科技支撑计划项目(2010BAD01B06;2011BAD20B08);现代农业产业技术体系建设专项(CARS-13);国家农业科技成果转化资金项目(2011GB2D200001);湖南省政府重大专项(湘府阅[2014]35号)
摘 要: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 后,开始出现漏播。该研究为确定播种器的工作参数提供了依据。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 each row .The simulation results showed that activity seeds churned by hole wheel principally distributed along the surface of the hole-wheel with three layer .With the increase of rotate speed , the seeding amount per minute had in-creased ,the seeding amount per revolution had reduced oppositely .When the rotate speed is between 20r/min to 60r/min,its seeding uniformity coefficient variation was 14%~31% and the consistency coefficient variation of total seeding amount in each row was 2 .94%~4 .6%.when the rotate speed is exceed 80 r/min ,a miss-seeding is appeared .This paper provide data for designateing suitable working speed of the metering on hole -wheel seedmeter .
分 类 号:S223.2[农业科学—农业机械化工程]
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