Comparación de la efectividad de las técnicas de ultrasonido pasivo y análisis de vibraciones en la detección de fallas incipientes en rodamientos.

Abstract

This paper describes the comparison between the effectiveness of the technique of passive ultrasound and vibration analysis in detecting incipient bearing failure. For this analysis a training module was build where several angular, controlled from 5,2 to 22,7 mrad were performed at intervals of 5,2 mrad for 4 hour of operation corresponding to 100% of the total duration of the test for each interval to a misalignment of the shaft rotation speed 3750 rpm. The Vibrachek 200 equipment was used, with its respective accelerometer data collection to capture the vibration spectrum in both radial and axial positions (ISO 10816-1, 1995). To analyze the spectrum envelope willing acceleration was used in the standard, which allows to filters signal of high frequency vibration; just as a magnetic for passive data collection using the Ultraprobe 15000 ultrasound transducer equipment was used. After analyzing the data it was concluded that the passive analysis is more effective than ultrasonic vibration analysis in detecting incipient bearing failure, because the first technique to visualize changes that occur in the components of the bearings at high frequencies, without neglecting vibration analysis which allows us to observe spectrum different stages that occur during the development of an incipient failure of a bearing. It is recommended, in the case of performing monitoring with ultrasound equipment; remember to measure with the same operating parameters with which the baseline measurement was performed, to thereby obtain a more accurate analysis of conditions active monitor. For this purpose, the present researching works was made based on the investigation guidelines of ESPOCH-2012; ARTICLE V, thus contributing to the sustainability of the Plan Nacional del Buen Vivir and indirectly with the new production and energy matrix of the country.