基于EDEM软件的肥料调配装置关键部件参数优化与试验  

Parameter optimization and test of key parts of fertilizer allocation device based on EDEM software

作　　者：顿国强[1] 陈海涛[1] 冯夷宁 杨纪龙[1] 李昂[1] 查韶辉 

机构地区：[1]东北农业大学工程学院,哈尔滨150030

出　　处：《农业工程学报》2016年第7期36-42,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：公益性行业(农业)科研专项经费项目(201303011);现代农业产业技术体系建设专项资金(GARS–04);东北农业大学研究生科技创新基金(yjscx14020)

摘　　要：为实现播种作业条件下肥料调比的分层深施,以满足不同作物整个生育期的养分供应,设计了肥料调配装置,并通过理论分析的方法确定了各关键部件的主要参数。以挡杆直径及分肥份数为试验因素,合格系数及波动系数为试验指标,分别采用仿真试验及验证试验的方法,进行二因素三水平正交肥料均布器参数优化试验研究,试验结果表明:均肥份数为极显著影响(P<0.01),挡杆直径为显著影响(P<0.05);肥料均布器最优参数为挡杆直径4 mm,均肥份数16,此时,试验指标合格系数及波动系数的仿真值及试验值分别为0.903、0.928及68.6、78,相对误差分别为2.19%、12.05%,验证试验与仿真试验具有相同的因素指标响应趋势,利用仿真试验进行肥料均布器参数优化具有可行性。该研究为肥料调配装置的设计研究提供了参考。Because of the covering of a large amount of root and straw after no-tillage sowing, when doing inter-tillage and topdressing, it will cause the rate of seedling injury to increase and affect crop yield, and meanwhile, due to no fertilizer application before no-tillage sowing, so it is very important to supply sufficient fertilizer to meet different crops' nutrient requirements on the growth duration. Relevant research points out that, when the layer spacing and ratio between based fertilizer and seed fertilizer are 6 cm and 3:7 for wheat, the fertilizer can guarantee crop's nutrient requirements in different stages, but for soybean, it is 4-8 cm and 1:2, and other crops are also different. There are many research reports about layered fertilization ditcher in and abroad, but there are few researches on fertilizer allocation device. So, it is very important to design a new fertilizer allocation device with adjustable ratio. The application of prototype simulation technology of granular materials has become simple and easy with the increase of computer operation speed and the introduction of EDEM, and meanwhile, it can shorten the time of research and development cycle and reduce the costs. A new fertilizer allocation device with adjustable ratio, which consists of bevelled tongue outer groove-wheel fertilizer feeder, fertilizer uniform distribution device and fertilizer ratio-adjusting device, has been designed, and it has the function of separating the fertilizer in different layers in adjustable setting proportion, and meanwhile, the main parameters of key parts have been made by theory analysis. In order to enhance the accuracy and stability of fertilizer allocation device with adjustable ratio and analyze the influence on working performance when structure parameters of fertilizer uniform allocation device change, at first, the discrete element simulation model of fertilizer allocation device with adjustable ratio is built by using EDEM and the working process is simulated. The fertilizer particles' space dis

关 键 词：农业机械 优化 计算机仿真 基肥与种肥 调配装置 试验 

分 类 号：S224.2[农业科学—农业机械化工程]