DESIGN AND EXPERIMENTAL OF A SEED METERING DEVICE FOR SMALL SIZED VEGETABLE SEEDS
小粒径蔬菜种子排种器的设计与试验
DOI : https://doi.org/10.35633/inmateh-76-85
Authors
Abstract
Aiming to address the challenges of difficult seeding and low precision for small sized vegetable seeds, a novel precision seed metering device featuring separated seed picking and dropping functions was developed for small-sized vegetable seeds. The structure and working principle of the device were analyzed. Based on physical property testing and analysis of vegetable seeds, the structural parameters of key components including the seed picking wheel, seed dropping wheel, and separator plate were designed using numerical calculation methods. Bench performance tests were conducted for parameter optimization. A quadratic orthogonal rotational composite design experiment was employed, with the Working Speed of the metering device and the Tilt Angle as experimental factors, and the Qualified Index of seed spacing and the coefficient of variation as evaluation indices. The results indicated that when the Working Speed ranged 24.32~37.67 r/min and the Tilt Angle ranged 3.52 ~ 9.19°, the seeding Qualified Index exceeded 90% and the Variation Coefficient was below 12%, meeting the requirements for superior seeding standards. This study utilized the separated type of picking and dropping seed metering device for sowing small sized vegetable seeds, providing novel concepts and theoretical references for the innovation of precision vegetable seed metering devices.
Abstract in Chinese