Improvement of the technological process of sowing sunflower seeds with a pneumatic seed planter

The article provides the objectives for the need to study the influence of the shaper on the seed velocity, as well as the influence of the arrangement of its rods on the grain speed at the outlet of the seed flow shaper. The general scheme of the seed flow shaper, its description, 3D model and its arrangement on the seeder are given in the article. It also describes the method of measuring the velocity of seed material. As a result of the study, the dependence of the velocity of sunflower seeds on the distance of the placement of rods, as well as the velocity of grains without a flow shaper, is presented. It was found that as the distance between the axes of the rods increases from 5 to 30 mm, the seed velocity at the outlet from the diffuser increases insignificantly, being in the range of 3.2 – 2.7 m/s. The results of using the seed flow shaper of the proposed design on the seed line of the Amazone DMC Primera pneumatic seed planter for sunflower sowing are also presented. As a result of the assessment of the uniform distribution of plants in rows by seedlings, it was concluded that the quality of seeding improved, the coefficient of variation of intervals between plants was 61.2 and 78.4% with and without the use of a shaper, respectively.