Construção de uma bancada de ensaio para avaliação de mecanismos dosadores de sementes

• Autor(a) principal: Kempski, Luciano Aparecido
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do UNIOESTE
• Texto Completo: http://tede.unioeste.br:8080/tede/handle/tede/2775
• topic: simulador de velocidade; velocidade de deslocamento; estande; Distribuição de sementes; simulator; displacement speed; stand; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA

The current work aimed the construction of a benches group for simulating displacement speeds of sowers. The speeds simulator was performed and was carried out in the mechanical trials laboratory located at UTFPR - campus Medianeira, and the assays of system´s evaluation were performed at the Agricultural Engineering Experimental Nucleous - AEEN, which belongs to West of the Paraná State University- campus Cascavel. The benches group of assay or speeds simulator is composed by two rolls: one of this set through a hydraulic engine brand TRW, and other one used as support for the wheels system of the sower. The hydraulical engine was connected to the hydraulical command of the tractor through fast connection, which become the coupling and withdraws of hoses easier when stationary assay of displacement speeds is performed. The assays were performed aiming the determination of the maximum rotation for the hydraulical engine without load and also with the sower on the rolls, in order to get ranges of displacement speeds in a fast and accurated form. The results obtained of the regulating valve´s opening and closing (A1 the A7) forms, in function of the hydraulic engine´s rotation and the displacement speed, are presented in figures, tables and relation ´s graphs. The tables present the average values and the hydraulical engine without load is presented by the comparision between the averages. For the hydraulical engine without load can be reach speeds ranged from 20 to 375 rpm in accordance to the results obtained, which is linked to the enough displacement speeds. The benches group essay was showed as functional and also presented compact structure, with the flowing rangel of speeds verified through the pairs of gear. Its versatility is evidenced by the use of the hydraulic circuit of the tractor as energy source for the speeds simulator.It was observed that the regulating valve of outflow was efficient for the regulation of the hydraulical engine´s speed when it was assayed with load; it means that, with the sower on the cylinders. The results obtained allow to present the following conclusions: it is a too much suitable resource, considering the easiness, quickness and the capacity for obtaining several regulations, allowing the simulation of displacement speeds from 3,23 to 13,89 km.h-1; it fits perfectly in sowers with pneumatic wheels; the weight and size allow the transport without difficulties, provide conditions to evaluate the distribuition mechanisms of the seeds or fertilizer, and avaluation the longitudinal distribution of seeds, in accordance to the evaluation criteria of performing in spacements: normal, double and defective.