| Aiming at the working condition and object of the 9GSCC-1.4 sunken-plantharvesting equipment,resistances of ship body and cutting fram were analyzedby means of theory of hydromechanics and traction force of the chain-type convegor were done also by means ofcalculation of tension.Power equation of the equipment, which relates to the implement's forward speed Vm ,chain-type convegor's linear velocity Vs and cutting frame's angle of dipα,was attained.This paper established a mathematical model for power consumption as objective function,based on thefundamental,structural dimensionof the equipment. By experimental analyzing the optimal rangers of Vm(0.45～0.60m/s),Vs(0.60～0.99m/s) andα(40°～50°) were determined for the harvesting equipment.Technical economic indexof comp up to higherlevel.This essay not only is regarded as an important referential valuefor design of sunken-plant harvesting equipment,but also establishes a theoretical foundation for design subject of sunken-plant harvestingequipment.
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