Vibration Analysis for compressors
Vibration Analysis is one of the most effective ways to monitor compressors: it catches developing faults — valve wear and breakage (reciprocating), bearing wear, rotor fouling and clearance loss — early, so repairs are planned rather than forced by a breakdown.
Why vibration analysis suits compressors
Compressed air and process gas are expensive to produce and critical to operations, so a compressor failure is doubly costly: lost production plus a high-value repair. Compressors also degrade gradually — fouling and valve wear quietly raise energy use long before failure — so monitoring protects both uptime and the energy bill.
How vibration analysis works
Accelerometers capture the vibration signal, which is transformed (typically via FFT) into a frequency spectrum. Because each fault type excites characteristic frequencies — running speed for imbalance, twice running speed for misalignment, bearing-defect frequencies for bearing wear — the spectrum reveals not just that something is wrong but what and how severe. Trending the signal against a baseline turns a vague 'it sounds rough' into a dated, prioritised work order.
Faults it catches on compressors
- Valve wear and breakage (reciprocating)
- Bearing wear
- Rotor fouling and clearance loss
- Lubrication problems and oil contamination
- Overheating and efficiency degradation
- Imbalance and misalignment
What the data shows
Rising amplitude at running speed points to imbalance; high vibration at twice running speed suggests misalignment; energy at specific bearing-defect frequencies indicates bearing wear; broadband high-frequency noise can mean lubrication problems or, on pumps, cavitation.
Related
Predictive maintenance for compressors · Vibration Analysis overview · Vibration Analysis