小麦种子物理特性参数测定及在播种机排种器设计中的应用

Determination and Application of Physical Characteristic Parameters of Wheat Seeds in Design of Plot Precision Seeder

为获取小麦小区精密播种机排种器和自动供种装置的设计依据,研发初期选取济麦22种子作为测量对象,测定了种子的千粒质量、容重、三轴尺寸、休止角和静摩擦系数等物理特性参数。测量得知:济麦22种子千粒质量均值46.02 g;容重均值831.30 g/L;三轴尺寸的长、中、短轴均值分别为6.47、3.42和3.08 mm;休止角均值28.9°;小麦与不锈钢板之间的静摩擦系数最小,为0.427。上述参数的测定,为小麦小区精密播种机排种器和自动供种装置相关参数的确定提供了有力的数据支撑,在一定程度上提高了整机的工作性能。

In order to obtain design basis of precision seeder metering device and automatic seed supply device in wheat plot,Ji-mai 22 seeds were selected as measurement object at early stage of research.Physical parameters such as 1000-grain weight,volume weight,triaxial size,angle of repose and static friction coefficient of seeds were measured.Average 1000-grain weight of Ji-mai 22 seeds was 46.02 g.Average volume weight was 831.30 g/L.Mean values of long,medium and short axes of triaxial size were 6.47,3.42 and 3.08 mm,respectively.Mean angle of repose was 28.9°.Static friction coefficient between wheat and stainless steel plate was the smallest,which was 0.427.Determination of above parameters provided a strong data support for determination of relevant parameters of seed metering device and automatic seed supply device of precision seeder in wheat plot,and improved working performance of whole machine to a certain extent.