Can anyone provide in tabular form various vibration phenomena (like unbalnace, looseness, vpf etc) relating them to peaks and phase as a quick guide to dignose reasons?

No responses. Why?

No responses mainly because every one is getting ready for Christmas on Christmas Eve.
I'm waiting on breakfast now on Christmas Day. As soon as that is ready, I'm out of here for the rest of the day too.

Get your self one of the Tech Associates wall charts. It lists them all and is a good starting point.

Dave

Here are a few links:
http://www.technicalassociates.net/os-vib-diag-wall-chart.html

http://www.efftek.co.uk/Download.htm

http://www.rms-training.com/products.htm

Hope everyone's Christmas was joyous

Jim P

If you buy the Technical Associates wall chart be sure to get the text that accompanies it and have the education that is necessary to understand and interpret the information.

Someone posted this on this board in a past thread...

Vibration_Diagnostic_Chart.ppt (400 Kb, 116 downloads)

quote:

Originally posted by Danny Harvey:
If you buy the Technical Associates wall chart be sure to get the text that accompanies it and have the education that is necessary to understand and interpret the information.

Danny
I am a mechanical engineer by profession with 16 years of experience with specialisation in rotary equipemnts. If you are satisfied with my capacity to comprehend technical things, I just want to know if anything like this is avialable with you or on net to work as a simple guide to help in formulating a path for cause diagnosis?
Regards.

Some good links are here:

http://maintenanceforums.com/eve/forums/a/tpc/f/3751089...301059451#2301059451

This message has been edited. Last edited by: electricpete,

The chart from Technical Associates is used allot for what you are asking. Many engineers have expressed that the vibration field is one of science and art. For example, vibration signature peaks that typically represent unbalance (1XRPM) could also be from resonance or misalignment. The chart mentioned does give a guide as what to look for if you have the tools to complete the additional testing.
The training we have all paid for and the experience we have gained over the years lets us use the science and learn the art of diagnosing vibration and the other related issues. No one chart will have all the answers but can guide you in a direction, to estimate with high probability, the problem.

I see from above that you are a Mechanical Engineer with 16 years experience in rotating equipment. My question to you is what training have you had in vibration analysis?

This message has been edited. Last edited by: Don Jones,

My point is the same as Don's.

A wall chart is nice and I have one and refer to it often but I wouldn't advise using it as a substitute for vibration analysis specific training.

My satisfaction with your ability to comprehend technical things is irrelevant. Your ability to make accurate calls is relevant and is not guaranteed by ownership of a wall chart or an engineering degree.

Don Jones stated that "No one chart will have all the answers but can guide you in a direction, to estimate with high probability, the problem." I'd like to state that the use of "canned" charts can very often lead you totally astray. The very best is to think through how the symptoms present themselves and apply what you know about the machine (key ingredient). For example, you've got a large 4X and the machine has a jaw type coupling with the 4-sided rubber block - examine that coupling!

John from PA

I agree with your sentiments, John from PA (as in Paterno).

However, equivalent methodology like fishbone diagrams (Yes, dead fish) are part of some big companies procedures - not that your company would use dead fish but they do!

As you brought up in a way, knowledge of the machine is crucial. Too often people will present a few pretty pictures and ask for a solution out of context from the machine and the process.

It really ticks me off when your in a meeting to discuss a problem and someone points to a chart -- and the chart says ...

Many problems are simple enough to succumb to standard solutions but not all.