Implementação de sistema especialista para o monitoramento e diagnóstico de desbalanceamento em sistema mecânico rotativo por análise de vibrações.

Abstract

The rotating machines, when in operation, generate dynamic forces that propagate to the parts that support it, such efforts should be suitable considered during design. But some factors during assembly or use can lead to undesirable behaviors such as unbalance or misalignment which may result in extensive damage to rotor shaft assembly with other components in the system are interconnected. The aim of this work is to study the effect of the rotating unbalance in rotor dynamics using computational simulations through the finite element method, yielding curves of responses in the time and frequency domain and compare with the results obtained in an experimental setup. Then will be evaluated the vibration amplitudes for an unbalanced rotor-bearing system to define the severity criteria of vibration acceptable in the levels acceptable, alert and stop the system. The simulations were performed by computational routines in software such as Matlab® and Ansys®, where beyond the critical speed can be evaluate the amplitudes of displacement and inferences of vibration levels for various unbalanced masses. After getting the results was proposed an interface vibration control using the software LabVIEW®, where the severity of vibration in the system is evaluated in real time. It can be concluded that the implementation of the analysis and control system was very satisfactory, thus obtaining a better prediction of these rotating equipment maintenance and reduced costs for industry in relation to rotating equipment and its components.