Testing and Evaluation of Rice Thresher

Abstract

The performance of a 4 feet rice thresher was evaluated at Kasetsart University under different drum speeds and feeding rates. The rice thresher was fixed on the steel rail in the laboratory after taking off the two rubber wheels used for transportation the thresher. The main axis of the rice thresher was connected by the v-belt to 19 kw electrical dynamoneter equipped wiht a torque transducer and rpm pick up. The variety of RD23 was prepared in which moisture content were 16.6% for grain and 11.3% for straw respectively. The test code of the rice thresher followed the IRRI test code. The result of the test, the capacity and oiwer requirment were 949-1901 kg/hr and 3.69-5.75 kw respectively. The total losses due to breakage, unthreshed and and blown was found to be 0.37-1.48%. The threshing and cleaning efficiency were 99.95% and 88.91% respectively. The aspect to be considered towards the machine development should be part modification in order to improve power requirement, capacity and cleaning efficiency.