Theoretical investigation of rotary digging tool parameters for potato tubers

Abstract

The development, design and research of the parameters of new potato harvesters is an important and urgent task in the field of potato production. The aim of this research is to substantiate rational design and kinematic parameters of the lower and the upper blades of the beaters of the vertical rotor of a potato harvester by determining the velocities of collision of the blades with the tuberous layer of their most characteristic points. Theoretical investigations have been carried out, and then, using the calculations on a PC, graphical dependencies of the main parameters of the process under study were constructed. The values of absolute velocities of collision of the lower and upper blades of the vertical rotor beaters, respectively, at the initial and final points with the tuberous layer of the soil, were determined. The values of the absolute velocities of collision of the lower and the upper blades of the vertical rotor blades were determined, respectively, at the initial and final points with the tuberous layer of the soil. Rational kinematic parameters of the lower and the upper blades of the vertical rotor beaters are calculated, respectively, at the initial and the final points, where the greatest destruction of the tuberous layer occurs. For the lower blade of the beater, the absolute collision speed at the angle of rotation ωnt = 120º at the starting point is Vsp n = 1.69 m•s -1 , at the end point -Vsp n = 1.94 m•s -1 . For the upper blade of the beater, the absolute speed of collision at a terming angle ωbt = 120º at the starting point is Vsp b = 1.63 m•s -1 , at the end point -Vsp b = 1.92 m•s -1 . The angular velocity of the rotational motion of the upper and the lower rotor blades was equal to ω = 10.46 s -1 .

Planting and Harvesting Mechanization on Productivity, Energy Efficacy and Profitability of Potato Production

“…Use of potato harvester can open most of the tuber in single pass during harvesting. Potato harvester can reduce number of labour requirement and drudgery than manual harvesting methods but there was no yield change with respect to change of harvesting methods [6,18].…”