Study On Some Mechanical And Physical Parameters Affecting Threshing Process Of Wheat Crop

The experimental studies were carried out mainly for threshing wheat crop (Sakha 69 variety) to determine the effect of drum speed, feed rate under different grain moisture content on machine performance, threshing efficiency, total grain losses, consumed energy rate and total cost requirements. The obtained data revealed that the minimum grain losses, maximum cleaning efficiency and threshing efficiency were1.83%, 99.50% and 99.87%, respectively at drum speed of 700 rpm (26.75 m/s) grain moisture content of 11.7% and feed rate of 1.08 Mg/h. The minimum consumed energy rate was 12.16 kW.h/Mg at drum speed of 450 rpm (17.20 m/s) grain moisture content of 11.7% and feed rate of 1.68 Mg/h. The minimum threshing cost was 51.25 L.E./Mg at drum speed of 700 rpm (26.75 m/s) grain moisture content of 11.7% and feed rate of 1.68 Mg/h.