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Modeling of Power Requirement in Axial Threshing Units

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  013045,  2001 ASAE Annual Meeting. (doi: 10.13031/2013.7416) @2001
Authors:   Petre I. Miu
Keywords:   Axial, Combine harvesters, Models, Power requirement, Threshing

Threshing unit requires the major part of combine harvester power used to harvest grain. That becomes all the more evident as, with the axial flow design, a high percentage (up to 80 %) of the total power should be consume by the rotor.

This paper presents a mathematical model for rotor idle power and process power requirement for axial threshing units. A generalised equation of power required by the rotor of an axial flow combine harvester was developed on a physical basis and a reiterated multiple regression technique. The function is related to crop properties (crop type and moisture content of material other-than-grain (MOG)), throughput, rotor speed and concave clearance.

The model validation is based on experimental data obtained from the testing for different axial threshing units. A very good agreement shows the comparison of predicted and experimental data.

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