To improve the seed separation uniformity in the seed storage device of a wheat plot seeder, this paper investigates the key factors influencing its performance. First, the working principle of the seed storage device and the movement of seeds are analyzed, and the lifting mechanism of the seed storage tube is controlled by an electric pusher. Based on this analysis, the relevant parameter factors are identified. Next, EDEM software is used to simulate the seed storage process and determine the optimal combination of parameters. A three-factor, three-level central composite design experiment is conducted, with the inner diameter of the seed storage tube (D), the lifting height (L), and the lifting speed (V) as the test factors. The coefficient of variation of seed distribution uniformity (m1) is used as the performance index. The optimal values determined for the parameters are D = 0.06 m, L = 0.015 m, and V = 0.05 m/s. Finally, bench experiments are carried out to verify the results. The experimental findings show that the average coefficient of variation for seed distribution using the traditional lifting lever is 6.46%, while the optimized parameters reduce it to 4.12%, significantly improving seed separation uniformity and meeting the seeding requirements.
Xue et al. (2025) studied this question.