烟草包衣种子的物理特性研究

对烟草K326包衣种子的物理特性(三轴尺寸、千粒重、孔隙率、休止角、内摩擦角、滑动摩擦角)和空气动力学特性(漂浮速率、漂浮系数)进行测定,得到包衣种子的三轴尺寸平均值分别为1.691、1.687、1.687 mm,千粒重为5.12g,孔隙率为42％,休止角为23.49°～26.95°,内摩擦角为4.5°,与不锈钢板的滑...

Experimental study of physical properties of tobacco seed

The physical characteristics (geometrical size, 1 000-grain weight, porosity rate, rest angle, internal friction angle and sliding friction angle) and aerodynamic characteristics (floating speed, floating coefficient) of coated K326 tobacco seed were measured. The results showed that average geometrical size was 1.691 mm in length,1.687 mm in width and 1.687 mm in the height; 1 000-grain weight was 5.12 g, porosity rate was 42%, rest angle was 23.49°26.95°, internal friction angle was 4.5°, sliding friction angle was 7.85°11.35°(stainless steel plate), the floating speed was 6.35 m/s and the floating coefficient was 0.24; At the same time the friction angle of naked tobacco seed (rest angle, internal friction angle, sliding friction angle) were measured, The results showed the rest angle was 32.58°35.72°, internal friction angle 5.15° and sliding friction angle 5.15°9.34°12.7° (stainless steel plate). The volume of the naked seed increased and the shape of the seed become sphere after coated. Compared to the naked tobacco seed, rest angle, internal friction angle and sliding friction angle of coated tobacco seed were smaller which is beneficial to the seed flowing.