Studies on Grain Binder (I)

Power Requirements of the Functional Parts of Binder at Wheat Harvesting

Abstract

From the experiments of wheat harvesting by three-row type walking grain binder, the following power requirements of each part of it were obtained:
(1) The torque of driving wheel and binding unit was constant independently of wheat feed rate (kg/sec), those of pick-up unit and conveyor were linearly increased and that of cutting unit was slightly decreased with the increase of wheat feed rate.
(2) When the density of planting of wheat was low, the net torques of each part were relatively small compared with their no-load torque.
(3) The torque of driving wheel was relatively large compared with the other parts.
(4) When the what feed rate was 0.25-0.45kg/sec the total power requirements were 0.6-1.15 PS at packing, and 1-1.8 PS at binding in the first gear, and they were 0.5-0.9 PS at packing and 0.8-1.4 PS at binding in the second gear.
(5) The total power distribution rate was in the following orders: at packing, driving wheel (31-40%)>pick-up unit>cutting unit>conveyor>binding unit (4-10%), and at binding, binding unit (39-42%)>driving wheel>pick-up unit>cutting unit>conveyor (10-11%). Binding unit power rate at binding was relatively high.
(6) Even if wheat feed rate was the same, the power requirement in the second gean (high traveling speed, low revolution) was considerably small and economic compared with the power requirement in the first gear (low traveling speed, high revolution).