Parameter Combination Optimization of the Lateral Straw Clearing and Throwing Knife Based on Discrete Element Simulation

In order to explore the laws of corn straw lateral moving and throwing, it is necessary identify main factors that restrict improvements in quality clearing reductions power consumption then optimize knife parameter combinations; this paper, kinematic analysis single-stage throwing was carried out, mathematical model for collision process between established. Key affecting efficiency were determined according analysis. A combination optimization test conducted with three-factor five-level quadratic regression orthogonal rotation center methods discrete element virtual simulation, taking into account edge angle cutting, radius knife, speed roller as rate performance evaluation indexes. The results showed at a travel 7.2 km/h when cutting 65°, 420 mm, 538~600 rpm, ≥85%, ≤1.5 kW. field out verify optimized results, values indexes all ranges interval. These research lay down foundation design knives.