基于EDEM仿真玉米高位投种结构参数分析与试验OA

In order to solve the problems of poor sowing quality and grain spacing uniformity in the process of high-level maize seeding in breeding plots,the influence of the relative position of the seed metering device and the seed guide tube on the grain spacing uniformity was studied and analyzed.Through the theoretical analysis of the seeding process,it is concluded that different grain spacing conditions of high-speed operation will affect the horizontal sub-velocity generated when the seeds are separated from the seed tray,causing the seeds to collide in the seed guide tube,resulting in unpre-dictable discharge trajectories.The distance uniformity also decreased.The EDEM discrete element analysis software was used to simulate the seeding process,and it was concluded that under the condition of a vertical distance of 344 mm,the horizontal distance between 150-230 mm grains was 82 mm,and the horizontal distance between 230-300 mm grains was 84 mm.It can meet agronomic requirements and obtain better grain spacing uniformity.The bench test was carried out to verify that,compared with the unoptimized monomer,the optimized monomer can obtain better seeding quality,and the maximum variation coefficient of grain spacing uniformity is 12.04%,which meets the operational requirements of precision corn sowing in plots.