【作者】 张广智；

【导师】 宋建农；

【作者基本信息】 中国农业大学 ， 机械设计与理论， 2000， 硕士

【摘要】 本文就气吸式水稻钵盘精量播种机的有关机理进行了理论分析和试验研究。建立了吸嘴前种子在气流作用下的受力模型，给出了吸嘴吸种的条件，分析了临界状态下影响吸种过程的各因素之间的关系。并通过种子盘的振动分析、四杆机构的运动分析，得出种子在种子盘上、被吸嘴吸附前和吸附后的运动状态以及运动参数的变化曲线。通过正交试验和二次旋转组合试验，得出各因素对播种性能的影响情况，并找出了各因素的较优水平和最优组合，给出各性能指标随各因素的变化曲线。试验表明，本机在“V”型吸嘴下对杂交水稻的播种性能最好，单粒率相当高。更多还原

【Abstract】 In this paper, the author analyzed the theoretical and experimental performance on the working principle of the Rice Precision Suction Seeder (RPS S). By the analysis of airflow, the mathematical force model of seed in front of nozzle was established, the picking-up condition of nozzle was given, and the relation among several influential factors obtained under the condition of critical state. Moreover, by the analysis of vibration of nursery tray and movement of mechanism, the author educed the moving state of seeds which in the nursery tray, before or after picked up. basis on this the author obtained the varied curve of moving parameter. By the means of theoretical analysis, experimental tests carried out to measure the effects of several factors, by the meantime, according to the experimental data, the better level of veral variables, their better combination and the varied curves of performance index were acquired. For cross bred rice, the performance of this seeder is satisfying with high rate of single seed.更多还原