Vibration Analysis for Rotating Equipment

Published: 25th August 2011
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Rotating equipment like motors, compressors, fans and pumps are vital components in most manufacturing machinery. Preservation and maintenance of such equipment understandably becomes a prime focus to ensure reliable and uninterrupted operations of a manufacturing plant. Most plants assign teams to conduct predictive maintenances and condition-based monitoring by implementing vibration analysis equipment.
Vibration analysis equipment can be typically implemented on all forms of rotating equipment ranging from less than 1 rpm to over 10000 rpm. This means they can be used on paper machines, turbines, motorgenerators, reciprocating engines, conveyor belts, rolling mills and mining tools like continuous mining machines and long wall shearers.
Industries like aviation and power generation, where rotating equipment hashigh operational significance make frequent use of vibration analyzers to avert breakdowns and reduce maintenance and production expenses. Vibration analysis equipment typically consists of transducer probes and analysis software that enable maintenance personnel to understand the overall health of a machine by measuring minute vibrations in its bearing locations. This process helps identify exactly which components are faulty before any serious damage occurs.
Statistics show that about 80% of machinery issues isdue to imbalance or misalignments in the rotating equipments. Implementation of vibration analyzers helps avoid premature bearing, coupling, shaft sealing and gear wear-and-tearing. It is important to understand that imbalances or misalignments do not necessarily happen only over a period of time but may even occur immediately after the installation of new machinery. Vibration analysis techniques also help authenticate the accurate installation of a new piece of machinery.
Vibration analyzers to rotation equipment are like electrocardiograms to the human heart. Vibration monitoring equipment helps monitor the rhythm of the rotation equipment and identify abnormalities, if any. The vibration spectrum provides a reading of the rotation equipment much like a health chart after a cardiac stress test, and even highlights the origin of the uncharacteristic vibrations.
Vibration analyzers function on two simple principles.First, every common failure mode will consist of distinct vibration frequencies that can be identified in isolation. And, unless there is a change in the functional dynamics of machinery, each distinct vibration component will have consistent amplitude.
Vibration analyzer exercises combined with strong condition monitoring processes are said to offer ROI of six times the overall capital cost of machinery. Equipped with the kind of information offered by vibration analysis equipment, personnel can take informed decisions related to repair and maintenance of machinery and make sure that that they function flawlessly throughout the operational process.

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