Projeto de um sistema de exaustão num microabrasômetro para realização de ensaios tribocorrosivos

Abstract

At this present undergraduate final project, the knowledge of the three main mechanical engineering fields (materials, mechanical designs and thermo-fluids) was applied to concept an exhaust system to an equipment of tribocorrosion test, which one was manufactured at Materials and Tribology Lab (LTM). Such equipment is a fixed ball micro abrasometer that can perform micro-abrasion and corrosion tests simultaneously. In this way, according with the methodological characteristics of eletrochemical tests the equipment users noted the need of install a fume exhaust system that would avoid contamination of the work environment and equipment users by toxic gases, corrosion byproducts. Respecting the equipment functional characteristics and the test methodologies, it was designed, built and installed a specifically exhaust system that made possible remove toxic gases originated from corrosion mixtures in a way that the assay atmosphere did not become disturbed (turbulent), what could compromise the tribocorrosion tests. For that goal a local exhaust system was created, in which the need was considered for materials that would not possibly be affected by the vapors generated by the solutions. To the project and calculation of flow rate required to retaining the released vapors were used standard procedures largely find at the currently literature, as well the head lost that should be overcome by the system motor/fan were quantified. After assembly completely all the system, was possible verify that the project would works exactly as designed, however to increase the system performance would be necessary modified the group motor/fan, taking it out of the main stream gas flow and remodeling it as an assembly on the surrounds of the pipe line, avoiding the main equipment to be in contact with the corrosion gases.