Abstract: Aiming at the problems of the complex transmission structure of the traditional ground wheel drive type spoon wheel row seeding and the existing electric drive seed arrangement technology not suitable for the geomorphology of the Yunnan Plateau, a spoon‑wheel type electric drive corn seed row device was designed. SolidWorks software was used to design key components and perform force analysis of seeds in the seed spoon to determine the maximum speed of the seeder. EDEM software was used to simulate the working process of the seeder and explore the influence of rotational speed on the pass rate, missed broadcast rate and replay rate. The hardware equipment of the relevant modules of the electric drive part of the seeder was selected, and the operation process of the seeding system was formulated according to the functions of each module. Finally, the operation speed, seed opening height and sowing plant spacing were taken as the test factors, and the sowing qualification rate, missed sowing rate and replay rate were used as the evaluation indexes to carry out the bench test. The results showed that the sowing quality was best when the sowing speed was 5 km/h, the height of the seed opening was 40 mm, and the sowing distance was 260 mm. At this time, the pass rate was 90.89%, the missed rate was 3.76%, and the replay rate was 5.35%, which met the agronomic requirements for precise sowing of feed corn in Yunnan.

Key words: corn, spoon?wheel type, seeders, electric drive, seeding quality

摘要： 针对传统地轮驱动式勺轮排种传动结构复杂、现有电驱动排种技术不适应云南高原地貌等问题，设计一款勺轮式电驱动玉米排种器。利用SolidWorks软件对关键部件进行设计，并对种勺内种子进行受力分析确定排种器最高转速。利用EDEM软件对排种器的工作过程进行仿真研究，探究转速对合格率、漏播率和重播率的影响。对排种器电驱动部分相关模块的硬件设备进行选型，根据各个模块功能制定播种系统作业流程。以作业速度、投种口高度、播种株距为试验因素，以播种合格率、漏播率和重播率为评价指标进行台架试验。结果表明：当播种作业速度为5 km/h，投种口高度为40 mm，播种株距为260 mm时，播种质量最好，合格率为90.89%，漏播率为3.76%，重播率为5.35%，满足云南地区饲用玉米精量播种的农艺要求。

关键词: 玉米, 勺轮式, 排种器, 电驱动, 排种质量