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Impact testing of potato harvesting equipment

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Abstract

Samples of 28 different potato harvester chain links in seven different configurations were evaluated using the MSU-USDA Instrumented Sphere (IS). During the fall of 1989, 23 potato harvesters in Michigan were evaluated using the IS. Besides the IS impact data, each harvester was measured for chain speed relationships, operating ground speed, chain type and drop height. Testing of the harvesters did provide a range of data that represents what is likely to occur when the IS is used to evaluate individual harvesters. Based on the average peak acceleration and velocity change values (and the computed severity rating), air heads had the most severe impacts. The next most severe impacts were the primary chain, where all impacts were on steel. Next were the transitions to the rear cross and the side elevator, both of which involved a change of direction for the IS and the potatoes. Roller tables had the least severe impacts.

Compendio

Se evaluaron muestras de 28 diferentes eslabones de cadenas de cosechadoras, en siete diferente configuraciones, utilizando la Esfera Instrumentada de la MSU-USDA (IS). Durante el otoño de 1989, se evaluaron en Michigan 23 cosechadoras de papa utilizando la IS. Además de los datos sobre el impacto de la IS, cada cosechadora fué evaluada por sus relaciones con la velocidad de la cadena, su velocidad de operatión sobre el terreno, tipo de cadena y altura de descarga. Las pruebas con las cosechadoras proveyeron un rango de information que representa qué es lo que puede ocurrir cuando se utiliza la IS para evaluar a cada cosechadora por separado. Basándose en la aceleración máxima promedio y valores de cambio de velocidad (y la tasa computada de severidad), las cabeceras de aire tuvieron el impacto más severo. Los siguientes impactos más severos fueron sobre la cadena principal, donde todos los impactos fueron sobre acero. Los siguientes fueron en las conexiones con la cruceta posterior y el elevador lateral, los cuales provocan cambios de directión para la IS y las papas. Las mesas agitadoras tuvieron los impactos menos severos.

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Brook, R.C. Impact testing of potato harvesting equipment. American Potato Journal 70, 243–256 (1993). https://doi.org/10.1007/BF02849312

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