This study demonstrates improved cleaning efficiency and reduced grain impurity rate in small combine harvesters, suggesting design advancements for hilly terrains.
Key Points
The designed cyclone separation cleaning system reduced grain impurity rate to 2.99%, enhancing efficiency.
Optimal operational settings included a fan speed of 4020 r/min and a scraper shaft speed of 340 r/min.
CFD-DEM coupled simulation provided insights into the motion trajectory and separation behavior of threshed material.
Field experiments confirmed simulation accuracy with impurity rates of 3.08%, indicating practical implementation potential.