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      DESARROLLO DE UN SEPARADOR DE OBJETOS DUROS EN EL CAFÉ A PARTIR DE LAS VIBRACIONES PRODUCIDAS EN PLACAS DELGADAS Translated title: DEVELOPMENT OF A SEPARATOR IN THE COFFEE HARD OBJECTS FROM THE VIBRATIONS PRODUCED IN THIN PLATES

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          Abstract

          En Cenicafé se diseñaron y construyeron prototipos electromecánicos denominados PESELOD (pescador electrónico de objetos duros) para la protección de las máquinas despulpadoras. Este nuevo módulo, localizado antes de la despulpadora, está conformado por un alimentador, un cuerpo vibrante (placa delgada o cono metálico), una compuerta, un recipiente para los objetos duros desalojados y un circuito para la detección y separación automática del objeto duro. Su principio de funcionamiento se basa en la diferencia de los parámetros de amplitud y frecuencia de las vibraciones producidas en el impacto del café y de los objetos duros contra el cuerpo vibrante. Se realizó el análisis histórico en los espectros de las aceleraciones que se indujeron teniendo en cuenta variaciones del material, espesor y apoyo. En la caracterización se encontraron mejores características de separación para placas de 2,5 mm de espesor, simplemente soportada y de material acerado. Los prototipos presentaron eficacias superiores al 80% y rendimientos entre 300 y 2.000 kg h-1 de café en cereza. De igual manera se realizaron variaciones tendientes a mejorar su operabilidad, relacionada con la limpieza de las placas para lo cual se construyó otro prototipo cuyo cuerpo vibrante lo constituía un cono acerado.

          Translated abstract

          Electromechanical experimental models of an electronic separator of hard objects, denominated PESELOD (pescador electrónico de objetos duros, Spanish) were designed and constructed in Cenicafé to protect the coffee processing machines. The module, located before the pulping machine, includes a feeder, a vibrant body (thin plate or metallic cone), a gate, a hard objects container and a circuit for both hard objects detection and automatic separation. Its principle of operation is based on the difference of amplitude and frequency of the vibrations produced by impact of coffee fruits and hard objects against a vibrant body. The historical analysis was made in the spectrums of the accelerations that were induced on different materials, thicknesses and boundary conditions. The device worked better with steel plates, 2.5 mm thick, simply supported. The model presented effectiveness greater than 80% and yields between 300 and 2.000 kg h-1 of coffee fruits. To improve their operability related to dirty plates, another model was constructed with a truncated cone vibrant body.

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          Most cited references 8

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          Measurements Systems: Application and Design

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            Measurement system: Applications and design

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              Device for separating hard objects, such as stones, from a stream of wood

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rfnam
                Revista Facultad Nacional de Agronomía Medellín
                Rev. Fac. Nac. Agron. Medellín
                Facultad de Ciencias Agrarias - Universidad Nacional de Colombia (Medellín, Antioquia, Colombia )
                0304-2847
                December 2008
                : 61
                : 2
                : 4686-4700
                Affiliations
                orgnameUniversidad Nacional de Colombia. Sede Manizales orgdiv1Facultad de Ingeniería Colombia jhestrada@ 123456unal.edu.co
                Caldas orgnameCentro Nacional de Investigaciones de Café Colombia carlos.oliveros@ 123456cafedecolombia.com.co
                Caldas orgnameCentro Nacional de Investigaciones de Café Colombia juanr.sanz@ 123456cafedecolombia.com.co
                Medellín orgnameUniversidad Nacional de Colombia, Sede Medellín orgdiv1Facultad de Ciencias Agropecuarias Colombia falvarez@ 123456unalmed.edu.co
                Caldas orgnameCentro Nacional de Investigaciones de Café Colombia diego.agudelo@ 123456cafedecolombia.com.co
                Article
                S0304-28472008000200021

                This work is licensed under a Creative Commons Attribution 4.0 International License.

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                Product Information: SciELO Colombia
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