水稻工厂化育秧流水线播土器设计.docVIP

水稻工厂化育秧流水线的播土器设计 摘 要 水稻工厂化育秧技术是我国水稻栽培技术的发展方向，而研究设计育秧设备，是推进该技术不断发展的技术措施之一。工厂化育秧包括播土、播种、覆土、洒水等主要生产过程，通常认为播种作业是非常重要的过程，但是，播土作业同样是育秧过程中不可缺少的重要环节，由于传统的育秧过程中每穴种子数多，对播土与覆土要求不十分严格，随着超级稻育秧技术兴起，每穴种子数减少，播种精度提高，对播/覆土要求十分严格，如播土厚度不均匀将影响育秧质量。 本文简要的介绍了国内外的育秧技术的发展情况和国内现有的播土装置的构造优缺点，分析并提出现有播土装置的缺陷，设计出新型播土装置，并对此进行了全面的理论分析与研究。本文的研究结论如下： 1）系统地介绍了我国现有播、覆土装置的研究现状，详细的分析了它们的结构特点和不足，在此基础之上，研制出一种排土稳定均匀的播土装置，选取 V 形推土片大直径滚筒作为排土部分的关键部件。 2确定了 V 形推土片大直径滚筒播土装置的滚筒结构参数、V 形推土片的结构参数和分布情况。利用土壤与钢的摩擦角和摩擦系数，确定了土箱排土口位置、导流板与水平面的夹角 γ 和挡土板的结构、位置参数。从理论上建立了滚筒转速与生产率、播土厚度、V 形推土片宽度时间的数学模型，建立了排土量与滚筒转速、V 形推土片参数之间的数学模型。利用 CATIA 软件装配模块建立了播土装置的 3D 模型。 Design of Spreading Soil Device for Factor Rice Seedling-Nursery Abstract The technology of Factory Seedling-nursery is the development direction of the paddy cultivating technology in our country, to research and design the seedling-nursery device is one of the most important methods to impel the seedling-nursery technology to develop unceasingly. Factory Seedling-nursery is made up of four processes which are Soil-spread, Precision seeding, Soil-cover and Water spray. In the usually opinion, the most important process is the Precision seeding, but the process of soil-spread is also essential to the seedling-nursery. With the development of the technology of super paddy seedling-nursery, the number of the seeds in per hole is decreased and the seeding precision is enhanced, so it is much strict to the processes of Soil-spread and Soil-cover, the quality of seedling will be reduced if the thickness of soil in the tray is not uniformity. Based on the comprehensive introduction to the structural characteristics of seedling development of domestic and foreign technology and the existing domestic broadcast equipment on the basis of soil analysis and pointed out the deficiencies of the prior sowing soil means proposed new sowing soil means, and this conduct theoretical analysis and systematic research. Research conclusions are as follows: 1) On the basis of introducin