Estudo termográfico de auxílio à detecção de falhas por desgaste mecânico em rolamento autocompensador de esferas.

Abstract

The aim of this study was to verify if Thermography can help in the diagnosis of failures in machine elements, notably self-aligning bearings with 2 rows of balls. The motivation arose from the need to verify the fault points existing in these mechanical elements to minimize and / or eliminate unexpected stops that could compromise the proper functioning of themselves and consequently of the machines of which they are part of. This study is classified as investigative, documentary, prescriptive, qualitative and quantitative. The methodology made use of test bench composed of several mechanical elements: electric motor controlled by frequency inverter, vibration-stop buffers, pulleys and belts, house bearings, radial load, thermal camera and self-aligning bearings with inner and outer race fault in a scenario with control conditions and non-control of ambient temperature, relative humidity, engine speed, air velocity, reflected temperature and emissivity. It was confirmed that there was a significant temperature change in the inner and outer races of groove-type failure bearings. On the other hand, no significant changes were observed in the inner and outer races of the bearing with abrasion wear failure. Finally, it was concluded in this work that the initial hypothesis was partially confirmed, that is, the Thermography can help to detect mechanical failures in groove type failures but not abrasive wear type failures.