Performance Test of Rice Combined Harvesters

Abstract

Field Performance Test in relation to accuracy of operation and cleaning efficiency of two different rice combined harvesters, a locally-made rice combined harvester and a Japanese head-feeding type combined harvester were tested. The locally-made rice combined harvester was tested at two speed ranging from low speed (0.464-0.482 m/s) and high speed (0.787-0.807 m/s). At low speed test, the total grain loss and cleaning efficiency were 3.75-5.963% and 87.93% respectively, compared with the high speed test, the total grain loss and cleaning efficiency being 4.848-8.009% and 89.43% respectively. The Japanese head-feeding type combined harvester was tested at four speed ranging from low speed (0.320-0.395 m/s), medium speed (0.612-0.693 m/s), high speed (0.81-0.835 m/s) and very high speed (1.00-1.063 m/s). It was shown that the most suitable speed of the machine was the high speed which it gave the lowest total grain loss of 3.995-4.747% and cleaning efficiency of 93.20%.