2007 Volume 69 Issue 1 Pages 37-43
The objective of this research is to propose a grain flow system of a head-feeding combine using a grain flow model. This model was built using the delay times for transportation, the distribution between clean grain flow and grain return flow, and the grain loss from suction fan. Within this model, the input was the flow rate of threshed grain dropped onto a grain pan, and the output was the flow rate of clean grain transport into a grain tank. To identify parameters of this model by experiment, we used two impact flow rate sensors, and measured the flow rates of grain flow to grain tank and grain return flow while the grain loss was neglected assuming it was enough small. As a result, the transport delay times and the distribution ratio of chaff sieve clearances of the test combine were determined.
