Machinery Vibration
- The vibration of rotating machinery may infer certain defects. The spectrum of the vibration can also be used like a finger print.
Frequency Possible causes 1 x operating speed - Imbalance
- Misalignment
- Bent shaft
- Looseness
- Electrical
- Bent shaft
2 x operating speed - Misalignment
- Bent shaft
Harmonics of operating speed - Loose mounts
- Loose bearing caps
Subharmonics of operating speed - Oil whirl
- Bearing cage defects
Non-integer multiples of operating speed - Rolling element bearings
- Gears
- Belts
- Blades
- Vanes
- Belts
Powerline frequency harmonics Electrical See also: Vibration.
Subjects: Mechanical Engineering Noise & Vibration
- Misalignment