Vibration monitoring flags a reading trending up or above alarm threshold.
1
Rotor/impeller/airend imbalance
CheckVibration analysis showing dominant 1x running-speed peak.
FixBalance rotating component per OEM procedure/tolerance.
ToolsVibration meter/analyzer
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2
Shaft misalignment (motor-to-airend or gearbox)
CheckVibration analysis showing dominant peaks at 1x and 2x running speed with high axial component; confirm with alignment check.
FixRealign drive train per OEM tolerance.
ToolsLaser alignment tool
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3
Bearing defect
CheckVibration analysis showing high-frequency bearing defect frequencies; compare to bearing fault frequency calculations.
FixReplace bearing before consequential damage occurs.
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4
Loose base/foundation bolts or degraded isolators
CheckPhysically check torque on all mounting bolts and condition of vibration isolators.
FixRe-torque and replace isolators as needed.
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5
Resonance with a structural or piping natural frequency
highCheckCompare running speed / blade-pass frequency to structural natural frequency (bump test or FFT).
FixAdd stiffening, change mounting, or consult a vibration specialist to detune resonance.
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Safety
Lockout/tagout before opening enclosures. Verify zero energy. Bleed system pressure before opening any pneumatic connection.