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Kinematic Model of Material Movement through an Axial Threshing Unit

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

Citation:  Paper number  023052,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.9624) @2002
Authors:   Petre Miu
Keywords:   Algorithm, Axial flow, Combine harvesters, Computer simulation, Grain Separation, Modeling, Optimization

This paper presents the study of the movement of a material particle through the threshing space of an axial threshing unit. The developed kinematical equations are based on a nonlinear law governing the non-uniform movement of the material on an uneven helical path. These equations allow establishing of:

  • The characteristics of material trajectory (length, angle, pitch length, number of material
    • revolutions) as functions of longitudinal position along the rotor;
  • The components of material velocity.
The model was validated with reliable experimental data. The results are very useful for practical analysis of material movement influence on process performance indices such as grain separation and damage as well as for threshing unit design and process optimization. The kinematic model proved to be highly significant and useful for predictions.

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