【摘要】 本文讨论了与筛选有关的林木种子几何尺寸、表面特性和筛选参数,提出五种林木种子的几何尺寸分布密度曲线,并分析了特殊性质,通过试验,得出了五种林木种子的表面摩擦系数,作出选择筛孔的选择表和筛选运动参数选择图表,非常便于应用,并为设计林木种子清选机械提供理论基础。更多还原

【Abstract】 Some problems concerned with the selection of screen as the geometrical size and the surface character of tree seeds,the moving system and the parameters for selecting screen have been discussed.The distributional densimeter curves of geometrical size resulted from five kinds of tree have been made and the specific features have been analysed.The friction coefficient of five kinds of tree seed has been given by experiment and the selection table of mesh has been shown.The selecting calculation table of grader parameter has been made out,which is convenient for application and it has provided theoretical basis for designing tree seed grader.更多还原