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Sabroe Vibration Monitoring system (SVM) Automatic vibration monitoring system for Sabroe screw compressors SVM provides accurate, continuous monitoring of the bearing vibration levels in Sabroe screw compressor packages, adding significant extra safety margins and potentially extending the service life of these crucial compressor components Planning service life can now be based on the real condition of these bearings, rather than on mere projections SVM offers on-screen trending and inspection of vibration levels, commissioning tool for determination of the vibration level threshold values (for alarm and shutdown), remote monitoring opportunities, and it is also Johnson Controls OpenBlue ready With the connected speed feedback signal and preprogrammed bandwidth for broadband monitoring, SVM can filter away the harmless lobe passing frequencies that might give misleading signal levels and focus only on the frequency ranges that give the best early indications of bearing fatigue With the 1X rota- tional speed function, SVM may also be able to capture sudden imbalance (e g in the coupling), giving SVM a chance to stop the compressor before it causes a major breakdown SVM’s potential free contact output for protective machine shut- down is connected to the safety circuit in the UniSAB III, but the generic signal design enables conventional hardwired integration with any design of electrical starter circuits SVM system The SVM package includes two factory-mounted accelerometers for the compressor, but it is also possible to add two additional accelerometers for compressor motor bearing monitoring With the SVM system, the conventional 6-month vibration analysis – normally recommended to make sure the screw compressor components comply with expected vibration levels, based on the full-spectrum baseline established at start-up – is no longer required Advantages Benefits SVM receives motor speed data from the variable-speed drive (VSD), enabling SVM to ignore normal lobe passing frequencies and detect only for damaging frequencies Early warning of any increasing bearing fatigue Suppresses misleading signals and therefore avoids false alarms and shutdowns Paves the way to effective repair planning that avoids costly disruption of plant operations Constant monitoring of bearing vibration development ensures the best possible preventive monitoring of bearing conditions The standard recommended 6-month vibration analysis, using the Sabroe VibraGuard tool, is no longer required UniSAB III systems controller automatically shuts down the compressor before any vibration level reaches a critical threshold Less risk of severe equipment damage 68PDF Image | Sabroe Products 2022
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