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vibration analysis

If the Bearing is Hot: (It might be greased or not)

"Vibration analysis" is commonly used to assess bearing condition however, although the vibration data can appear ok, there are other conditions which can exist or be unknowingly created to open the door for potential failure.

I am referring to bearing lubrication. This is an area where although, information by the bucket full can be easily obtained, Practicing the art of proper bearing lubrication tends to be ignored, not practiced or severely misunderstood. Usually, one step in a PM requires maintenance personnel to grease the bearings. This practice has become acceptable because we all know what happens when there is not enough grease so...we apply the old rule of thumb that is; "better to have too much grease than not enough" right? The problem is... we really aren't sure how many times or the last time a bearing on a particular machine got greased. It has been said over and over again that over greasing can cause more damage. Unless some system has been put into place to record the greasing activity, we can never be 100% sure. I will demonstrate through the use of infrared technology what the outcome will be if over lubrication happens.

Great Savings for Great River

Continuous Monitoring Lowers Costs, Boosts Performance

by Robert Skeirik and Craig Truempi

The ability of continuous vibration monitoring to provide early detection of potential bearing problems in rotating equipment allows users to plan maintenance work in advance. This maximizes uptime by minimizing the impact of costly machine break downs.

Meggitt Sensing Systems Introduces the Endevco Model 7268C Miniature Triaxial Shock Accelerometer

Meggitt Sensing Systems, a Meggitt group division, has announced the global market introduction of the Endevco model 7268C, a miniature triaxial piezoresistive accelerometer designed for high-reliability measurement of short duration shock across three axes and in three orthogonal directions.

Asset Condition Management

Practical Vibration Analysis: 10 Steps to Spectrum Analysis Success

A 53 Minute iPresentation Tutorial by Jason Tranter, Mobius Institute

So much valuable information can be hidden in a vibration spectrum. This Webinar will provide you with a series of steps you can follow to ensure that you unlock that information and make an accurate and timely diagnosis.

1) Learn how to quickly assess the quality and severity of the vibration

2) Learn how to categorize the peaks in the spectrum and thus direct the analysis process

3) Learn how to identify possible bearing faults even if you don't have bearing forcing frequencies

Sherborne Sensors Debuts A640 Series Precision Solid State Accelerometers

Sherborne Sensors (www.sherbornesensors.com), a global leader in the design, development and manufacture of inclinometers, accelerometers, force transducers, load cells, rotary encoders, instrumentation and accessories for industrial, military and aerospace customers, has introduced the A640 series, a range of fully customizable, single-axis solid state accelerometers, offering precision measurement capabilities within a variety of applications.

Diagnosing Tiny Bubbles

Vibration Signatures of Cavitation in a Centrifugal Pump

by Dr. Lin Liu & Dr. Suri Ganeriwala

Cavitation is a major source of problems in centrifugal pumps. If it is not detected early enough, it can even destroy a pump. Vibration analysis is often used to determine the cavitation, but its vibration signature is still elusive.

Asset Condition Management

Many Vibration Programs Fail Because They Become Too Complicated —Keep Things Simple

Many vibration programs fail because they become too complicated. Too much data can sometimes become more confusing than too little data. Many potential machinery problems can be eliminated with

Meggitt’s Wilcoxon Research M12-style Accelerometers and Cable Assemblies

Meggitt Sensing Systems, the makers of Wilcoxon Research vibration sensors and sensor networks, has added three new accelerometers with M12 connectors to its product line. The M12 connector makes it easy to implement vibration monitoring where the existing infrastructure is already built around the M12 standard, such as the process industries. Several compatible M12 connector-cable assemblies are also now available.

Meggitt Sensing Systems Facility Renews AS9100, ISO 9001, and ISO 14001 Certifications

Meggitt Sensing Systems, the manufacturer of Wilcoxon Research vibration sensors and sensor networks, passed annual audits to keep current the Germantown facility’s AS9100 Aerospace Standard for Quality Systems, ISO 9001 Quality Management System, and ISO 14001 Environmental Management System certifications.

Endevco, Ferroperm, Vibro-Meter, Sensorex and Wilcoxon Combine into Single Meggitt Sensing Division

The Meggitt group is making the transition to a new structure comprising five operating divisions: Meggitt Sensing Systems, Meggitt Aircraft Braking Systems, Meggitt Control Systems, Meggitt Polymers & Composites and Meggitt Equipment Group. Based on core capabilities, this is designed to build stronger, more integrated operating divisions. The transition should be completed in 2010.

Balancing a Generator at a Hydro Electric Plant

Just two years after installation of a new turbine-generating unit at the 93-MW Thompson Falls hydro project, PPL Montana LLC noticed increasing vibration values on the generator guide bearing. After several unsuccessful attempts to correct the problem, plant personnel adjusted the clearance on the guide bearings. Since that work was completed, the unit has operated within acceptable vibration values.

vibration analysis

Always Set Up Trend Parameters in Your Vibration Database