【作者】 吴晓萍；

【导师】 刘俊峰；

【作者基本信息】 河北农业大学 ， 农业机械化工程， 2003， 硕士

【摘要】 播种是农作物种植过程的重要环节，作物尤其是中耕作物的单粒点播具有增产增收、节种、省肥、省工、降低作业成本、提高劳动生产率等优点。研发和优化适于单粒点播的播种机械及排种器这一核心部件尤为必要。 球勺型内窝孔垂直圆盘排种器是一种新型的机械式排种器，它适于中耕作物的单粒点播，其排种元件为球勺型内窝孔。本文阐述了它在结构和工作机理的改进和创新。本排种器利用球勺内窝孔定量，多力联合作用进行充种，靠自身重力清种、投种，排种精确、定量、可控。 本文主要着重点是借助计算机的应用，优化设计单粒点播排种器的排种精度、降低伤种率。通过对排种轮的充种极限速度、清种始角、护种始角、排种器的投种口尺寸、型孔的尺寸等运动参数和结构参数进行分析，总体了解排种器结构参数和运动参数对其工作性能的影响，建立种子的运动方程，进而建立各主要参数(充种速度、清种角、护种角等)的数学模型，运用计算机辅助分析(CAA)方法，通过Visual Basic编制程序，对排种器工作过程中种子的运动进行动态模拟，找出影响排种器工作性能的主要因素，并对其参数进行优化，为合理地优化设计奠定了基础。更多还原

【Abstract】 Dissemination is the most important stage during the agricultural plating,single-seed dissemination of crop, especially the wheat, the mealie etc, can improve the productivity, save seeds and fertilizer save time and then reduce costing, increase productivity. It is very necessary to research and optimal the device of dissemination,Ball-spoon shaped vertical-plate metering device filling in inside is a new type dissemiantor, which can meet single-seed-dissemination. It’s construction is Ball-spoon shaped device filling in inside. This paper stated the improvement, innovation and working principle of this mechanism.The disseminator carry on single-seed pointed-planting using of Ball-spoon shaped device filling in inside, a few aspects of power working together perform filling seed, clearing seed and dropping seed, which can guarantee precision quantify and controlling.The main context of this paper is improving the precision of the disseminator. Through analyzing the motion and construction parameter, Making sure of the factor of working property, the motion equations of seed were established, and then the mathematical patter of main parameters were established. Using of VB, we compiled procedure to simulate the motion of seed in the working process, finding the main factor that affect on the working property of the disseminator, then optimal designing of parameters of the device was laid.更多还原