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Design and evaluation of a high-speed centrifugal precision seed-metering device for soybean based on DEM simulation
Diseño y evaluación de un dispositivo de dosificación de semillas de precisión centrífuga de alta velocidad para soja basado en simulación DEM
DOI:
https://doi.org/10.15446/dyna.v93n240.121631Palabras clave:
precision soybean sowing, centrifugal type, high-speed metering, DEM (en)siembra de precisión de soya, dosificador centrífugo, alta velocidad, DEM (es)
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A high-speed centrifugal precision seed metering device for soybeans was developed to improve single-seed sowing accuracy under high-speed operation. The device integrates an involute deflector strip and ellipsoidal seed grooves, driven by a stepper motor to control the centrifugal disc and seed-metering wheel. Using EDEM software, a simulation model was established. A quadratic orthogonal design was applied with deflector type, disc speed, and seed-metering wheel speed as factors, and qualified seeding rate and miss rate as indicators. The optimal combination—disc speed of 49.01 r/min and wheel speed of 593.75 r/min—achieved a 92.08% seeding qualification rate and 1.91% miss rate. Bench tests confirmed strong agreement with simulation results, verifying the system’s reliability. This study offers a theoretical and practical reference for the development of high-speed precision metering devices for soybean planting.
Se diseñó un dispositivo dosificador centrífugo de alta velocidad para la siembra de precisión de soya, con el fin de mejorar la eficiencia y la calidad en la dosificación unitaria de semillas bajo condiciones de alta velocidad. El sistema incorpora tiras deflectoras de perfil involuto y cavidades de almacenamiento elipsoidales, accionadas por un motor paso a paso que regula el disco centrífugo y el rotor dosificador. Se desarrolló un modelo de simulación mediante el software EDEM, y se aplicó un diseño experimental ortogonal rotacional con tres factores: tipo de deflector, velocidad del disco y velocidad del rotor. Los resultados óptimos (49.01 r/min y 593.75 r/min) alcanzaron una tasa de dosificación correcta del 92.08 % y una tasa de fallos del 1.91 %. Las pruebas en banco confirmaron la fiabilidad del dispositivo. Este estudio proporciona una base técnica y experimental para el desarrollo de dosificadores de precisión centrífugos en la mecanización agrícola.
Referencias
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