Vibration Diagnostic

Spectral Analysis

Through the frequency analysis of the vibration signal you can identify and diagnose several possible problems. Although a correct interpretation of the Frequency Spectrum requires a precise knowledge of the machine, especially for rotating machines, it is possible to identify specific areas, in relation to the frequency of rotation, that need to be taken into consideration:

Frequency Range Potential Problems
Below rotational speed This area is called subsynchronous and if any peaks occur in it, they tend to be dangerous (e.g.
journal bearing oil whirl)
From 1 to 10 times rotational speed This is the area of low-frequency events related to the rotation. Symptoms of all the basic mechanical faults (unbalance, misalignment, looseness, etc.) usually occur in this area
Above 10 times rotational speed This is the area of high-frequency events. Symptoms of roller bearing defects, gear faults, etc. occur in this area
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