DISTRIBUTION OF SEEDS UNDER THE BLADE OF OPENER OF SEEDING MACHINE

Abstract

There is presented a device that allows adjusting a required speed of seeds falling onto the divider to provide spreading of seeds along the width of sowing band. A mathematical model has been developed to enable the determination of parameters of the opener receiver depending on parameters of the seeding machine, on a required width of sowing band, geometrical parameters of the opener, and velocity restoring factor in seeds after the impact. There was developed the opener receiver for the seeding machine Ob-4-ZT. The average width of sowing band during tests of the opener receiver at the Altai Machine Test Station made up 19.5 ± 1.4 - 19.8 ± 1.6 cm, the variation coefficient 18.3-18.7%. The basic parameters of the opener receiver are height of setting divider from the bottom of the furrow (0.05 m); angle of setting divider relative to the back of the receiver (110°); angle of inclination of the back of the receiver (53°); height of impact point of seeds at the back of the receiver (0.08 m). There were carried out investigations into the use of divider of 90 mm wide instead of that of 45 mm with the screen mounted under the divider. The wide divider increases the unevenness of seed sowing. The screen mounted under the divider allows improving quality of seed distribution and decreasing the variation coefficient from 41.3 to 30.3%.