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The patterns for grainpassing throughthe concave and separating grates of an axial-flow combine, and the grain damaged by threshing and separating, were determined for barley. Nearly 85% of the separated grain passed through the concave grates with 40% through the right-hand side. The patterns were largely independent of the feed rate, moisture content, helix angles of the transport vanes, rotor speeds and concave clearances, whereasthe grain damage was independent of only the concave clear ance and the vane angles. The percentages of skinned and broken kernels were small, rarely exceeding 5%.
H.P. Harrison 1992. GRAIN SEPARATION AND DAMAGEOF AN AXIAL-FLOW COMBINE. Canadian Agricultural Engineering 34(1):49-53.
Canadian Society for Bioengineering