COORDINATION OF FLIGHT TIME OF GRAIN IN THE REST SPACE AFTER THE IMPACT OF THE DISTRIBUTOR WITH THE TIME OF OPENING THE RIB
The provision of agricultural production with highquality and reliable machinery primarily with seeders providing direct sowing is a necessary condition for the competitiveness of agricultural products. The substantiation of the parameters of the seed distributors of the paw coulters of the stubble seeders, which provide subsoilfree sowing is an urgent scientific and technical problem and is of practical importance for the agro-industrial complex. An analysis of passive distributors providing subsoilfree sowing with mechanical seeders with seed sowing is presented. In order to ensure seed distribution over the entire width of the opener, the flight time of the seed must be matched with the furrow opening time. The grains must fly to the far zones of the the rest space before they are covered with soil descending from the opener paw. Therefore, the duration of the opening of the furrow must be greater than or equal to the time of flight of seeds to the distant portions of the rest space. The conditions of seed distribution by seed drills with mechanical seeding during a rebound from a reflecting surface, directed perpendicular to the direction of movement of the unit are considered. A design scheme for the grain flight and the opening of the rid has been developed and a method for calculating the time opening of the rid has been presented. The dependence of the time interval on the rebound of the grain to cover it with soil on the speed of the sowing unit was established. The horizontal projections of the flight path of the grain upon rebound from the reflector depending on the speed of the sowing unit are determined. It is proved that in the grain flight zone the rid is opened from the moment of the impact on the twolane seed distributor to fall on the seed bed.