Authors

Abstract

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.

Abstract in Chinese

为提高小麦小区播种机存种装置的分种均匀性，对小区播种机存种装置的相关试验因素进行了研究。首先，分析了存种装置的工作原理和种子的运动，通过电动推杆控制存种筒的升降；在此基础上，确定了存种装置的相关参数因素。其次，利用EDEM软件对存种装置进行仿真，确定各参数因子的最优组合；最后，通过台架实验对优化参数进行了验证。试验结果表明，传统提升杆的平均种子分散均匀性变异系数为6.46%，而优化参数下的平均种子分散均匀性变异系数为4.12%，提高了种子分散均匀性，满足播种要求。