Authors

Abstract

In order to improve the uniformity and stability of seed delivery and meet the requirements of precision sowing operation, a kind of seed push wheel designed to mesh with the seed discharging disk was developed. The wheel underwent theoretical analysis and experimental optimization regarding parameters such as tooth profile, tooth count, and tooth height. Using a pneumatically inflated maize precision seed-metering device as the seeding carrier, a full-factorial experiment was conducted with operational speed and tooth height as the experimental variables, and qualification rate, reseeding rate, and leakage rate as the performance indicators. A multivariate quadratic regression model was established to assess the relationships between the factors and indicators. The results indicated that optimal seed guiding performance was achieved when the seed push wheel had 9 teeth, a tooth height of 5.2–6.2 mm, and an operational speed of 9.0–12.6 km/h. This study provides a theoretical foundation and data support for the development of precision seeding technology and corresponding seed guiding devices.

Abstract in Chinese

为提高导种投送均匀性与稳定性，满足精量播种作业要求，设计了一种与排种盘啮合传动的推种轮，对其齿形参数、齿数、凸齿高度等因素进行了理论分析与试验优化。以气压内充式玉米精量排种器为排种载体，结合全因素试验，以作业速度和凸齿高度为试验因素，合格率、重播率和漏播率为试验指标，建立了因素与指标间的多元二次回归模型。结果表明，当推种轮齿数为9、推种轮凸齿高度为5.2-6.2 mm、作业速度为9.0-12.6 km/h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。