Authors

Abstract

To improve the uniformity and stability of seed guidance in ordered seed flow and meet the requirements of precision sowing operations, a brush-type seed guiding device capable of constraining all degrees of freedom of the seeds was designed. Bench tests were conducted to optimize the factors affecting performance, namely the nut-bolt head spacing, the brush-to-housing gap, and the brush belt speed. Through single-factor experiments, the influence of each factor on seed guidance performance was clarified, and reasonable value ranges were determined. Combined with a response surface test, a multiple quadratic regression model was established to describe the relationship between these factors and the variation coefficients of pass rate, missed seeding rate, and seed spacing. The results show that optimal seed guidance performance is achieved when the nut-bolt head spacing is 39.15 mm, the brush-to-housing gap is 0.22 mm, and the brush belt linear velocity is 0.644 m/s. This study provides a theoretical foundation and data support for the development of precision sowing technology and its associated seed guiding devices.

Abstract in Chinese

为提高有序种子流导种均匀性与稳定性，满足精量播种作业要求，设计了一种可约束种子全部自由度的毛刷式导种装置，对影响其工作性能的螺母-螺栓头间距、毛刷-外壳间隙和毛刷带线速度等因素进行了台架试验优化。通过单因素实验阐明各因素对导种性能的影响规律，并确定因素的合理取值范围。结合响应面试验，建立了各因素与合格率、漏播率和粒距变异系数间的多元二次回归模型。结果表明，当螺母-螺栓头间距为39.15 mm、毛刷-外壳间隙为0.22 mm、毛刷带线速度为0.644 m/s时，导种性能最佳。本研究可为精量播种技术及配套导种装置的研制提供理论基础与数据支撑。