Consumed-Power and Load Characteristics of Potato Harvesting Operation in Dry Field

초록

This study analyzed the load and the consumed power characteristics of a potato harvesting operation in adry field. The potato harvesting operation was performed using an underground crop harvester mounted on anagricultural tractor with a rated engine power of 23.7 kW. The rotational speeds and the torque of the engineoutput shaft, rear axle, and power take-off (PTO) shaft were measured under various working conditions. Theload spectrum and the consumed power were analyzed using the measured data. The results show that theconsumed power of the rear axle increased as the working speed increased, while that of the PTO shaftdecreased. The consumed power of the engine output shaft showed a similar trend with that of the PTOshaft, but the torque deviation was larger in the load spectrum. The results of previous studies were used to compare herein the consumed power and the loadcharacteristics of the harvesting, rotary, and plow operations in a dry field. PTO and tractive power werehighly consumed in the plow and rotary operations, respectively. The consumed power of the PTO shaft andthe rear axle in the harvesting operation were 29–41% and 18–23% of the engine power, respectively. Compared to those in the rotary and plow operations, the engine power was relatively evenly distributed tothe PTO shaft and rear axle in the harvesting operation.

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