Mechanical Looseness

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Vibration Source

Exciting Frequency

Dominant Plane

Amplitude

Envelope Characteristics

Comments

Foundation Looseness

1X harmonics

Usually Tangential

steady

narrow band

Indicated by foundation flexibility.

Journal Bearing

Looseness

1X harmonics

radial

steady

narrow band

Harmonics may extend to 10X.

Extreme journal bearing looseness

0.5X half-order harmonics

radial

steady

Sometimes 0.25 X harmonics also present

Azima DLI provides products and services for Predictive Maintenance including vibration analysis instruments, monitoring and diagnostic software, and consulting for CBM programs.

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