Frequency Analysis and Phase Measurement of vibration Data to detect shaft Failure, A case study of Vibration system for Bently Nevada Corporation

The complicated mathematical aspects of vibration measurement system didn’t let it to be a common topic of instrumentation. It is necessary to be said that the presented paper would be so useful for many engineering and maintenance application of rotary machines. At the first part of the article the contactless eddy current based vibration sensor introduced. This vibration measurement system is the most important way nowadays at the industrial applications. At the next section the analysis theorem of vibration information discussed. Some arguments about the vibration frequency analysis and keyphasor techniques are presented. The simple examples of this paper described the concepts of keyphasor and frequency analysis. At last, the main part of the paper is a new way to analyze the condition of the rotating machine by the information extracted from the frequency and vibration data at MATLAB software. This important contribution is shown as some important instances presented based on the application use to show the ways to detect and troubleshoot the machine's failures. Most of the information at the presented paper is based on the technical document and application experiences of the south pars refineries of Iran. The data is extracted by condition monitoring devices in application.

Keywords:

keyphasor analysis , condition monitoring , frequency response , eddy current