Vibration Analysis for Reciprocating Compressors

Collection frequency depends on equipment criticality and operating conditions. Critical reciprocating compressors in continuous service typically require monthly vibration surveys at minimum, with more frequent collection warranted when trending indicates a developing fault. Online monitoring systems provide continuous data for the most critical assets.

Standard practice uses triaxial accelerometers mounted at each bearing housing to capture radial and axial vibration in reciprocating compressors. High-frequency enveloping sensors may be added for early bearing fault detection. Proximity probes are used on equipment with sleeve bearings to measure shaft relative vibration and orbit patterns.

OEM nameplate data, the unit's failure and repair history from the CMMS, current operating conditions (load, speed, temperature), and lubricant type if applicable. The baseline measurement itself runs about 20 minutes per asset for a full Vibration Analysis reading. Without baseline data, the first three months of route trending serve as a baseline window — anomalies become detectable around month 4.

Yes. Vibration Analysis measurements use overall velocity per ISO 10816-3, plus envelope spectrum 1-10 kHz which capture at the bearing housing, terminal box, or sampling point without disrupting operation. The Reciprocating Compressors stay online during the route. Only deep diagnostic work or repairs that follow from findings require taking the equipment offline.