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Mathematically modelling the power requirement for a vertical shaft mowing machine
Modelo matemático para la demanda de potencia de un aparato de corte de eje vertical para trituración de rastrojos
DOI:
https://doi.org/10.15446/ing.investig.v28n3.15130Keywords:
agricultural machinery, mechanisation, agricultural engineering, energy (en)maquinaria agrícola, mecanización, ingeniería agrícola, energía (es)
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This work describes a mathematical model for determining the power demand for a vertical shaft mowing machine, particularly taking into account the influence of speed on cutting power, which is different from that of other models of mowers. The influence of the apparatus’ rotation and translation speeds was simulated in determining power demand. The results showed that no changes in cutting power were produced by varying the knives’ angular speed (if translation speed was constant), while cutting power became increased if translation speed was increased. Variations in angular speed, however, influenced other parameters determining total power demand. Determining this vertical shaft mower’s cutting pattern led to obtaining good crop stubble quality at the mower’s lower rotation speed, hence reducing total energy requirements.
En el presente trabajo se desarrolla un modelo matemático para la determinación de la demanda de potencia del órgano de corte de una trituradora de eje vertical, considerando la particular influencia del régimen cinemático en la potencia de corte, que se diferencia de otros modelos de trituradoras. Se simula la influencia de las velocidades de rotación y de traslación del órgano de corte en la demanda de potencia. Los resultados demuestran que, si la velocidad de traslación permanece constante, con la variación de la velocidad angular de las cuchillas no se producen cambios en la potencia de corte, pero sí en el resto de los términos que determinan la demanda total de potencia. Al aumentar la velocidad de traslación la demanda de potencia crece. Este comportamiento de la trituradora de eje vertical permite lograr una adecuada calidad en la trituración de los rastrojos con menor velocidad angular del órgano de corte, disminuyendo la demanda de energía de la demolición de rastrojos.
References
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Copyright (c) 2008 Jorge Simón Pérez de Corcho Fuentes, Francesco Garbati Pegna
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