Experimental Study on the Particle Size and Weight Distribution of the Threshed Mixture in Corn Combine Harvester

The distribution of the threshed mixture is link between threshing and cleaning process during corn harvesting. Uneven leads to a local accumulation in cleaning, resulting high impurity loss rate. Existing studies rarely concern mixture. To address this problem, experiment was conducted self-made longitudinal axial system explore pattern, both particle size weight components (corn kernel, cob, husk) were analyzed study. results showed that drum speed concave clearance has significant effect on size. Moreover, impurities increase with speed. an obvious uneven trend. In distribution, kernels increased initially decreased afterwards, while cobs husks constantly increased. radial greater sides less middle; had clear left posterior accumulation. feed rate decrease aggravated inhomogeneity distribution. By analyzing characteristics, 400 r/min, 40 mm, 7 kg/s confirmed be optimal operating parameters. Under these conditions, weakened, which provided satisfactory base for subsequent cleaning. This study could provide data support improvement system. Additionally, believed have potential used structural design reduce improve performance.