Desenvolvimento de bancada de testes para avaliação dinâmica de eixos rotativos sob a ação de massas desbalanceadas

Abstract

This study aims to develop a didactic balancing machine for vibration analysis in rotating elements. The vibration transmitted by unbalanced masses to the bearings can cause operational interferences as noises and even failure of rotating element. Balancing, thus, seeks to decrease those effects by correcting the mass distribution in the rotor. The balancing machine developed is characterized by allow simulating rigid and flexible bearing balancing machines. This is due to the fact that one of the bearing supports has a mobile behavior, allowing a one degree of freedom oscillation for the desbalanced shaft/disc. In this way, vibration analyzes were performed on conditions of fixed and free support. There were also performed the balancing procedure by four runs without phase method, that is characterized by the use of test weights. On a general context, rigid support balancing procedure resulted on more accurated minization of vibration when the test weights increased. Although, both conditions of bearing support have not reduced vibrations to considerable levels, probably due to the balancing machine foundation stiffness. [resumo fornecido pelo autor]