![]() ![]() ![]() Maize seed collisions captured by the high-speed camera were consistent with the coupled simulation tests. High-speed camera and bench tests were used to verify the performance of the seed drop tube. The mean and standard deviation values of the seed fall time were 0.12 ± 0.008 s. The falling times of the seeds were nearly uniform. The analysis shows that the maize seeds collided after entering the seed inlet and before reaching the stable acceleration zone. The collisions of the maize seeds and the time of their fall were analyzed. CFD-DEM coupled simulation was used to investigate the movement of maize seeds in a seed drop tube with a throat height of 30 mm and a seed drop tube inlet diameter of 24 mm. ![]() The flow field simulations yielded the maximum steady-state airflow velocity for a seed drop tube inlet diameter of 24 mm and a throat height of 30 mm. The magnitude of the steady-state flow and the flow velocity of the steady-state airflow are analyzed for different combinations of structural parameters of the seed drop tube using computational fluid dynamics. ![]() The mechanism of the movement of the maize seeds in the seed drop tube was analyzed. The airflow-assisted seed-dropping device (the seed drop tube) was designed for an inside-filling air-blowing precision seed-metering device. This work aimed to improve the seeding quality of maize and to investigate the influence of the seed drop tube on the seeding quality. ![]()
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