Study on Shaking Selection of Grains for Combine Harvester

—Simulation of Shaking Selection for Grains with Straw Dusts Utilized 3-Dimensional Discrete Element Method with Non-Spherical Model—

Abstract

In this study, grains with straws dusts were put into the shaking selection part of a combine harvester, and the cumulative flowing down rates were obtained by examination. The influence of changing control factors on the shaking selection performance was investigated. The 3D-discrete element method (DEM) simulations were performed in relative examination conditions, and they were then compared. The results of examinations show that the cumulative flowing down rates were higher in front of the chaff sieves, and the sieve opening and revolution of the shaking motion were more highly influenced. In the 3D-DEM simulations, similar results were obtained quantitatively and qualitatively. It was shown that the states of shaking selection were understood by using the 3D-DEM simulations with the non-spherical model.