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Envelope Analysis:

We use envelope analysis together with other signal processing techniques for the early detection of faults in rolling element bearings, normally as part of an overall maintenance strategy.

Envelope processing shifts low amplitude high frequency harmonics of bearing defect frequencies into a low frequency range and enhances the components while suppressing the higher amplitude rotational components such as gear mesh and blade pass frequencies together with random broad band noise.

Envelope processing shifts low amplitude high frequency harmonics of bearing defect frequencies into a low frequency range and enhances the components while suppressing the higher amplitude rotational components such as gear mesh and blade pass frequencies together with random broad band noise.

Actual NDE Motor Bearing Envelope Spectra from Pump Sets ‘A’ and ‘B’ Showing ‘A’ with
High Carpet Level and Bearing Fault Frequencies and ‘B’ in Satisfactory Condition.

Envelope analysis is an invaluable diagnostic tool for monitoring rolling element bearings. The technique has surpassed other methods of detecting faults.
 
Tel: 023 92 596469 | Email: enqs@vibrationconsultants.com |Copyright©2006 Machinery Vibration Consultants Limited