Design and Experiment on Corn Thresher with Tangential-axial Flow Double-roller

The harvesting of maize kernels in the Huanghuaihai area has always been affected by factors such as high moisture content of the grains during harvest, resulting in severe grain damage after harvest, which directly affects its economic benefits. How to achieve low-loss harvest under the condition of high moisture content of corn kernels is the current development direction. Based on this, this paper combines a 4 YL-4/5 combine harvester to design a high moisture content corn threshing and separation device. In the case of direct corn grain harvesting, some technical parameters can also be adjusted to complete the harvesting of wheat and other crops. The device is divided into two parts: the shearing roller and the axial flow roller. The threshing roller’s threshing element adopts semi-circular head nail teeth. The design of the parameters of each key part; the dynamic balance simulation analysis and modal simulation analysis of the threshing part of the test bench using ADAMS and ANSYS have enhanced the reliability of the work process of the test bench.Through three factors（drum linear speed, corn kernels） Moisture content, gravure gap) Orthogonal test shows that under the conditions of moisture content of 24%-28%, drum linear speed of 17.28-20.16 m/s and gravure gap of 32～36 mm, the damage rate of corn kernels Less than 5% of national standards. The primary and secondary order of factors affecting the breakage rate is that the drum linear velocity is greater than the grain moisture content and greater than the gravure gap. At the drum linear speed of 17.28 m/s, the moisture content of 26%, and the gravure gap of 34 mm, the corn seed breakage rate was the lowest. This study can provide a theoretical basis for the direct harvest of corn with high water content.