Determining the structural parameters of the intensifi er and conditions for pushing potato tubers from the gap between the rods of separating elevators

   Machine potato harvesting is ineff ective on waterlogged soils at a moisture content of more than 24 % as rod gaps are clogged with rocks and tubers. The potato harvester design can be improved with an intensifier in the form of a clamping conveyor with flat blades set at an angle. The authors analyzed the conditions for ejecting tubers from the rod gaps of the separating elevators and determined the design parameters of the intensifier: the distance between the bars of 30 mm, the diameter of the bars of 11 mm; the inclination angle of the intensifi er blade to the plane of the conveyor belt of more than 82 °. Provision is made that when the tubers are pushed out, the gap between the rod and the tuber should be less than 5 mm. Based on the goal of increasing the completeness of soil separation and excluding damage to potato tubers, theoretical studies have established the kinematic parameters of the intensifi er: a conveyor speed of 0.8 m/s to 1.4 m/s, an elevator rod speed of 1.0 m/s to 1.8 m/s. To prevent tuber damage, the impact velocity of potato tubers with the blades must be less than 2.2 m/s. The blade pitch should equal 210 mm. Agrotechnical assessment of fi eld tests of the KPK-2-01 potato harvester with a separating elevator intensifi er carried out on the premises of the “V. D. Bykov’s Raduga Farm” located in Kamyshi, Kursk district, Kursk region, showed an increase in the completeness of soil separation by 8.3 %.

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