Abstract
The internal force feed mechanism of seeds was analyzed experimentally, especially in respect to the sizes, operating angles, speeds and distances of its cell for five kinds of seeds. Some results that would be useful for practical improvement of seeders were obtained as follows.
1. The reasonable diameter of a cylindrical cell is a little larger the maximum length of seeds.
2. The reasonable depth of a cylindrical cell differs according to sizes and shapes of seeds and is determined by the thickness for such flat seeds as corn, by the width for such spindle-shaped or ellipsoidal seeds as barley, wheat or soybean, and by the length for such spherical seeds as rape.
3. The cell has to operate as slowly as possible and at the angle over 33-45 degrees to a vertical line.
4. The larger sizes of seeds are and the faster the cell operates, the longer the operating distance of the cell must be made.
5. In the roll type feed mechanism, the operating distance of the cell is generally so shortened that this mechanism is not suitable for such large seeds as corn and soybean.
