制种玉米与剥皮机构互作过程仿真与试验OA北大核心CSTPCD

In view of the phenomenon of large grain loss in corn production using field corn husker,the collision and friction between corn ear and husker mechanism in the process of husking was theoretically analyzed,the main factors affecting the husker effect was obtained,and the discrete element and multi-body dynamic flexible model of corn ear-husker mechanism system was established.DEM-MBD co-simulation technology was used to simulate the interaction process between seed making corn and husking mechanism.Box-Behnken test design principle was adopted,with the distance between the press-feed device and the husking roller,the speed of the husking roller and the gap between the husking roller as test factors,and the average forward speed and maximum force of the fruit ear as test indexes,three-factor and three-level tests were carried out.Finally,bench test and field test were carried out.The results of theoretical analysis showed that the advance speed of corn ears along the peeling roller line and the applied force during the peeling process could represent the stripping rate of bracts and grain loss rate respectively.The test results showed that the optimum working parameter combination of corn husking mechanism was as follows:the distance between the press feeder and the peeling roller was 32 mm,the rotating speed of the peeling roller was 430 r/min,and the gap between the peeling roller was-0.3 mm.In this case,the husk stripping rate was 93.33％,the kernel shedding rate was 1.802％,and the kernel breakage rate was 1.203％.The error between the field test and bench test results was less than 3％.The roller used in the experiment can meet the performance requirements of corn husking,and the method used can provide some reference for the improvement of corn husking mechanism.