Experimental Study and Structure Optimization on Cleaning Device of Combine with Single Axial-flow

Abstract

This paper is aimed to find out main factors influencing material movement through analyzing its motion equations under the effect of the airflow. Orthogonal experiment was used to research the effect of four parameters on cleaning performance indicators (loss and impurity rate). The results show that the optimal working parameters are as follows: the fan rotation speed is 1400rpm, the wind plate I, II angle are 30° and 15°, and the fin-type chaffer scales is 24.5mm. Under this circumstances, the loss and impurity rate are 0.32% and 0.31%. The Fluent software was applied to simulate the airflow field of cleaning room, the results indicated that the airflow velocity in the back of screen surface is still lower than the front when parameters are optimal, and a return sieve plate was designed. Field experiment results demonstrated that when the installation angle of plate is 30°, the loss rate is 0.20% and the impurity rate is 0.17%.