Substantiation of the construction and technological scheme of the underground separatory working body of the potato harvesting machine

Abstract

Goal. To improve the quality of the potato harvester by substantiating the parameters and improving the design of the digging and separating working body. Methods. Analytical — during the analysis of structures and technological processes of working bodies of potato harvesters. Mathematical — for determining the parameters of the working bodies. Results. It is determined that it is possible to increase the quality indicators of potato harvesters by increasing the efficiency of the process of separation of soil impurities on the separating working bodies. The construction-technological scheme and parameters of the digging-separating working body with the device for uniform distribution of the dug-up potato heap on the width of a cloth of the rod-elevator conveyor are substantiated. Conclusions. Laboratory field studies of potato digger KRK-2 and potato digger loader KKN-2 with a new digging and separating working body (parameters: drum diameter D=560 mm; height of drum bar H=250 mm; alignment between drums A=350 mm; diameter rod dr=18 mm; circular speed of rotation of the drums VD=2.8 m/s; number of drum rods k=20, length of the distributor wing l=450 mm, wing height h=150 mm, angle of the wing α=40–45°, gap between the distributor and the conveyor Δ=80 mm; distance between the drums and the distributor L=600 mm), showed that the proposed working body improves the quality of potato harvesters.