【摘要】 对土壤耕作部件宏观触土曲面进行优化设计可有效减小工作阻力,设计的耕作部件具有结构简单、成本低、无额外能耗等特点。构成耕作部件宏观触土曲面的元线、准线及元线相对于准线的运动方式均会对工作阻力产生重要影响。从准线曲率的角度对各种土壤耕作部件触土曲面进行分类。阐述了耕作部件宏观触土曲面主要几何参数:宽度、切削角、耕作深度、宽深比和纵深比等对工作阻力的影响。特别分析了不同准线形式触土曲面,包括直线、圆弧、简单曲线及变曲率复杂曲线等触土曲面对工作阻力及土壤扰动的影响。更多还原

【Abstract】 The working resistance of soil cultivating component can be reduced efficiently by way of optimizing its macroscopic soil-engaging surface.The cultivating component designed by this method possesses the features of simple structure,low cost and energy-saving.The forms of generatrix and directrix,and the way of generatrix slides along the directrix would seriously affect the working resistance of soil cultivating component.The macroscopic soil-engaging surfaces of soil cultivating components were classified mainly by viewpoint of the curvature profile of the directrix.How the geometric parameters of the macroscopic soil-engaging surface of soil cultivating component affect the working resistance was introduced,including the width,cutting angle,cultivating depth,ratio of width and depth,ratio of length and depth,etc.The soil-engaging surfaces with different kinds of directrixes,including straight line,normal circular curve,simple curve and complex curvature-changing curve,were especially analyzed to uncover their affection to working resistance and soil disturbance.更多还原