Projeto estrutural de uma mesa densimétrica para beneficiamento de pequenos lotes de sementes

Abstract

Studies on grains and seeds play an important role in a country where their production and export is one of the largest markets in the local economy. The processing of grains and seeds has a great economic impact, from planting, studies, transformation processes and commercialization. Aiming at the public in the research area, this document seeks to present studies in relation to the mechanical design of a product on a smaller scale, in order to assist researchers in the agricultural sector. The density table is equipment that separates grains and seeds according to their density, where the separated matter is subsequently used for studies or production. The costs of these equipment are relatively high, and their maintenance and operation also require attention and resources, in addition to a large storage space. Using a theoretical approach for the design of the first component of the densimetric table, the structure, and on this, two initial iterations are made, where the first has estimates of stress and deformations for the first version of the structure, analysis of the results obtained through calculations and simulation using the finite element method. The second iteration is focused on considerations of mechanical improvements in the structure as observed in the finite element simulation, where the profile change between iterations proves to be effective. Taking into account the changes from the second iteration, the nodal analysis is carried out in order to know what the natural frequencies of the densimetric table are, since, since it works with the principles of vibration, these frequency ranges must be known so that when the The equipment is performing its function, these frequencies need to be avoided as much as possible to have a more stable and effective table in performing its function.