农机化研究Issue(10)：34-39,6.
型孔轮式排种器排种性能的仿真分析-基于离散元法
Simulation Analysis for Seeding Performance of Hole-Wheel Seedmeter-Based on Discrete Element Method
摘要
Abstract
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 .关键词
排种器/离散元法/数值模拟/油菜Key words
seedmeter/discrete element method/dumerical simulation/cole分类
农业科技引用本文复制引用
杨文敏,吴明亮,何腾飞..型孔轮式排种器排种性能的仿真分析-基于离散元法[J].农机化研究,2015,(10):34-39,6.基金项目
“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 （）
