Authors

Abstract

In the process of seed introduction, there is a problem of seed falling disorderly due to the collision between the seed and tube wall, which seriously affects the uniformity of seed spacing in the field. To solve this problem, this paper designed a kind of annular air-blowing auxiliary seed guide device. After a series of simulation experiments, theoretical research, and high-speed camera bench experiments, the optimal parameter selected combination of the critical structure of the seed guide device. The experimental results showed that when the annular air-blowing assisted seed guide tube was used, the positive air pressure was 2 KPa, the airway angle was 150°, the airway outlet width was 12 mm, and the distribution pore diameter was 4 mm. When the forward speed was 6km/h (the rotation speed of the seed metering disc was 25.30 rpm), the seed sowing effect was the best in the seed guide device; the qualified rate was 88.36%, and the coefficient of variation was 12%. This study provides a reference for improving seed spacing uniformity and can be used to optimize seed guide tubes.

Abstract in Chinese

导种过程中存在着因种子与管壁碰撞引起的种子无序下落的问题，此问题严重影响了种子在田间的粒距均匀性。针对此问题，本文设计了一种环形气吹辅助导种装置，经过一系列的仿真实验，理论研究，高速摄像 台架实验，选取导种装置关键结构的最优参数组合。实验结果表明采用环形气吹辅助导种管，正风压为2 KPa，气道角度 150°、气道出口宽度 12 mm，分配气孔直径4 mm，在前进速度为6km/h(排种盘转速25.30rpm)时种子在导种装置内，种播种效果最好到达最好，合格率达到88.36%，变异系数12%。导种效果好，该研究为提高播种粒距均匀性提供了借鉴，能够用于导种管的优化。