Vibration analysis in gearboxes can detect common defects such as gear misalignment, broken gear teeth, backlash and wear. Ferrography or wear particle analysis is also especially useful for detecting gearbox defects at an early stage. The benefit of both vibration analysis and wear particle analysis is to detect defects in gearboxes early in order to…
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Audit it. Improve it! Getting the most from your vibration monitoring program is now available for sale at MC 2014 in Daytona Beach, Florida. The book is now available online here: http://books.mro-zone.com/Audit_It_Improve_It_Getting_the_Most_p/mm9781941872246.htm
IMC 2014 put on by reliabilityWEB.com is coming up next week. Come see Alan Friedman present his workshop at IMC 2014 titled: “10 Reasons why you need to audit your vibration monitoring program NOW!” Alan Friedman will be presenting at IMC 2014 on Tuesday December 9th, 2014 from 9 AM- noon. You can find a…
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Tres maneras para detectar fallas en rodamientos incluyendo analisis de la onda de tiempo, de los espectros de vibracion y del espectro desmodulado.
Detecting bearing defects using vibration analysis Alan Friedman describes the detection of bearing defects using vibration analysis from the time waveform, the vibration spectrum and amplitude demodulation. This video is appropriate for anyone interested in machinery vibration analysis who wants to know about detecting bearing defects using vibration analysis. Bearing defects generate pulsations each time…
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Creating baselines and alarms The best alarm limit or baseline is created from data from the machine itself tested under a predetermined set of conditions including a set load, run speed, test setups and test points. If one keeps test conditions and test procedures constant over time then one can trend data to determine if…
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When using a condition monitoring technology to diagnose faults in machines or other plant assets, it is important to create case histories of each diagnosis, whether it was correct or not. If one uses vibration analysis for example, to detect rolling element bearing wear in a machine, and if this data is trended until a…
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There is a difference between using a predictive technology for troubleshooting and using it in the context of a condition based maintenance program. In the latter, it is extremely important to define and standardize test procedures in order to insure that the machines are always tested in exactly the same way year after year. This…
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Condition monitoring is a process of using a technology to detect changes in machine health over time in order to make a prognosis about when the machine will likely fail and to plan repairs or overhaul before that point. The frequency with which one takes measurements will depend on the machine, its current condition, and…
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A bump test is used as a quick and easy method to look for natural frequencies (related to resonance) in a structure. A bump test is conducted by hitting the structure with a moderately soft object like a 2×4 in order to make it ring in the same way one would hit a bell to…
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In condition monitoring programs, a technology will be employed to detect a problem with a machine or asset and a repair or overhaul may be conducted based on that information. Unfortunately, the overhaul is often conducted by another individual in the plant and the reliability engineer may never find out if his or her repair…
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Understand the machine By Alan Friedman When using vibration analysis or other predictive maintenance technologies, it is important to first identify the problem you want to solve and then consider the appropriate test or technology to solve it. More often than not, the cart is put before the horse and a technology is used with…
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by Alan Friedman Presented October 2009 at CMVA Introduction Although it has been said many times, it can never be said enough, when it comes to vibration, trend, trend, trend! I cannot tell you how many times I have been asked a question like “What are the acceptable levels of vibration in a 200 HP air compressor”…
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Dealing with a reduced maintenance staff Reliable Plant: Issue: 2/2009 The economic downturn is, or will soon, affect every one of us, which means we, once again, are going to be asked to do more with less. As maintenance departments lose personnel, decisions will have to be made on how to continue to keep operations…
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Why PdM Programs Fail: Misuse of Technology by Alan Friedman Originally published here: http://reliabilityweb.com/index.php/articles/why_pdm_programs_fail_misuse_of_technology/ A very good mechanic knows that you need the right tool for the job, but a common problem with PdM programs is that sometimes people acquire the tool before fully understanding what problem needs to be fixed. Of course, when you…
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Why PdM Programs Fail: Lack of Good Partnering -Alan Friedman Many companies have failed to experience the 10:1, 20:1 or even 30:1 ROI promised with the adoption of a Predictive Maintenance (PdM) or Condition Monitoring (CM) program. In recent years, the industry has seen a trend towards outsourcing these monitoring functions to experienced third parties.…
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Why PdM Programs Fail: Personnel Issues By Alan Friedman Many facilities and enterprises have failed to achieve the 10:1, 20:1 or even 30:1 Return on Investment (ROI) often promised with the introduction of a Predictive Maintenance (PdM) program. Investments have been made in monitoring equipment and training but, unfortunately in many instances, data collectors are…
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Why do PdM Programs fail? Originally published here: http://reliabilityweb.com/index.php/articles/why_do_predictive_maintenance_programs_fail/#! by Alan Friedman In the past few years we have witnessed a marked change in predictive maintenance (PdM) practices whereby more and more companies are choosing to outsource their programs. While many facilities routinely calculate 20:1 return on investment metrics, others cynically refer to aging data…
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What to Look for in a Vibration Consultant By Alan Friedman The following provides an introduction to vibration analysis technology and methodology with a focus on what to look for in a vibration analysis consultant. Many corporations today are looking to outsource machinery condition monitoring programs, while others wish to have an outside vibration consultant…
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