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Technical equipment testing

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Volume 76 / No. 2 / 2025

Pages : 994-1005

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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

(*) Qichao LI

Lingnan Normal University

Guoqin XU

Lingnan Normal University

Jinlong FENG

Lingnan Normal University

(*) Corresponding authors:

asetrc@163.com |

Qichao LI

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

针对小粒径蔬菜种子播种难度大,精度低等问题,研制一种新型取投分离式小粒径蔬菜种子精密排种器,分析排种器的结构和工作原理。通过对蔬菜种子物理特性测试分析,利用数值计算方法,设计了取种轮盘、投种轮盘、分隔板等关键部件结构参数。通过台架性能试验进行参数优选,以排种器工作转速和倾斜角度为因素,播种粒距合格指数和变异系数为指标,采用多因素二次正交旋转组合设计试验。结果表明:排种器工作转速24.32~37.67 r/min,倾斜角度3.52~9.19°时,播种合格指数>90%,变异系数<12%,达到播种优等标准要求。该研究利用取投分离式排种器播种小粒径蔬菜种子,为蔬菜精密排种器的创制提供了新思路和理论参考。

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