THE IMPROVEMENT OF MULTIPURPOSE COMBINED TILLAGE SEEDING UNIT WITH HORIZONTAL DISK COULTERS
To improve the existing combined tillage seeding unit with horizontal rotating coulters, a new arrangement is proposed; this involves the installation of tines inclined in the longitudinal and transverse planes; each following disk coulter partially overlaps the previous one with a gap between them. In addition, the new arrangement enables to continuously change the widths of the machine by turning the beams with the coulters relating to the axis attached to the frame. As the unit moves, the tilled soil layer puts pressure on the working surface of the disk. Due to the resultant cutting force and friction force, the disks of the right part would rotate clockwise, and those of the left part - counterclockwise. The surface of each working portion of rotating coulters will have a small relative velocity of the soil layer being tilled; this will significantly reduce the power consumption caused by friction. The procedure of calculation of the traction resistance of the proposed unit has been developed, and the economic effectiveness of its use has been evaluated.