目录1播种机发展现状与趋势................................................................11.1我国播种机发展现状.....................................................11.2播种机的发展前景...............................................................21.2.1单粒精密播种机迅速发展..........................................21.2.2播种机的通用性和适应性不断提高..........................21.2.3播种机向高速宽幅发展..............................................31.2.4广泛采用联合作业......................................................31.2.5新技术的应用不断普及..............................................32播种机概述....................................................................................52.1播种机类型...........................................................................52.2播种机主要结构...................................................................52.3总体配置...............................................................................62.3.1主要技术参数..............................................................73播种排种器....................................................................................83.1排种器的技术要求...............................................................83.2立式圆盘排种器的特点.......................................................93.3排种器参数设计...................................................................93.4壳体造型.............................................................................103.5种子的充填.........................................................................103.5.1排种器种子充填力学分析........................................103.5.2充种过成....................................................................134排肥器..........................................................................................154.1排肥器的要求.....................................................................154.2排肥器选择.........................................................................155开沟器及其起落机构..................................................................185.1开沟器的要求.....................................................................185.2开沟器的结构类型.............................................................185.3开沟器使用行距与前后列距离.........................................195.4芯铧式开沟器.....................................................................196输种管、覆土器、镇压轮..........................................................216.1输种管.................................................................................216.1.1输种管的类型............................................................216.1.2输种管的主要参数....................................................216.2覆土器.................................................................................226.3镇压轮.................................................................................226.3.1镇压轮的结构类型和特点........................................236.3.2镇压轮直径的确定....................................................246.3.2镇压弹簧参数设计....................................................257其他工作部件和机构..................................................................277.1种子、肥箱.........................................................................277.1.1种子、肥料箱容量计...
