Machine-crop parameters affecting performance of an axial-flow soya bean thresher
Vejasit, A.; Salokhe, V.M.
AMA, Agricultural Mechanization in Asia, Africa and Latin America 37(3): 32-38
A soyabean threshing unit was fabricated to study the effect of machine crop variables. This study was conducted at the Agricultural Engineering Division of the Department of Agriculture, Bangkok, Thailand. A peg-tooth drum was used for the study. Four levels of drum speeds (400, 500, 600 and 700 rpm m/second), three levels of feed rates (360, 540 and 720 kg (plant)/h) and three levels of soyabean moisture contents (32.88, 22.77 and 14.34% wb) were used for testing. The threshing efficiency varied from 98 to 100%. The grain damage and grain loss were less than 1 and 1.5%, respectively. The maximum power requirement was 2.29 kW at grain moisture content of 32.88% and at the drum speed of 700 rpm. The feed rate of 720 kg (plant)/h and 600 to 700 rpm drum speed gave highest output capacity, highest threshing efficiency, lowest grain damage and lowest grain losses. This unit will be later used on an axial-flow soyabean seed combine harvester.