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Reply by John from PA

what has been the behavior over time of this machine? Is this a new problem, a problem that perhaps had never been observed in the past,...
John from PA

Reply by John from PA

I don't see anything of concern at those specific frequencies of 990 cpm and 680 cpm. Your warning, if I interpret the plots correctly...
John from PA

Reply by John from PA

What is the frequency (in Hz) that you are concerned about? Is it the 998 cpm/16.5? Is it some other frequency?
John from PA

Reply by Hossam 2

I didn't attach any plots on NO Load condition all of them loaded condition. Input speed 998 cpm /16.5 hz I didn't mentioned numbers as...

Reply by aziz58

hi hossam does your soil composition and aggregation is same to another plants? and how about mass and speed of soil in input mill? are...

Reply by John from PA

By number, I was referring to something like 16.5 Hz, your bevel pinion speed. None of your plots are labeled as to loaded or unloaded.
John from PA

Reply by Chaitanya

I would like to add some relevant points regarding the background of this vibration problem: * The Relative shaft vibration trend of all...

Reply by Hossam 2

this unique frequency is load dependent frequency ,, as the grinding rollers are in load position this frequency shows and fluctuates ,,...

Reply by Rennie Cachia

Hello.... if you're in Europe, try AVT Reliability Ltd in UK. They are specialists in pipeline vibrations.

Reply by John from PA

Nothing in that file "document.txt" so until we hear from the OP we would only be guessing. It being a weekend, I'd still be guessing.
John from PA

Reply by Walt Strong

Thanks John for correcting my "senior moment". Now, do you have the vibration data? Walt

Reply by Walt Strong

I think I will wait for John to translate the MAAG/SKF bearing data, and for the OP to provide vibration data! Walt

Reply by Walt Strong

OP, Here are a few important questions: Can you describe the "pipeline"? What is the source of the vibrations? Where are you measuring...

Reply by John from PA

Check http://oaktrust.library.tamu.e...ce=1&isAllowed=y . In addition, Google “Engineering Dynamics pipe vibration”. You are seeking...
John from PA

Reply by Ngo Dinh

I agree with Walt. You could not just base on spectrum to define the level of damage and solution. Should confirm that 0.25mm is really...
Ngo Dinh

Reply by Walt Strong

Search for Magnetostriction Here is one reference: http://hyperphysics.phy-astr.g...olids/magstrict.html I do not know of a "Severity...

Reply by Becar

Yes, I think regarding spectra your situation is critical. You should compare new shaft price with repair price and then decide.
Becar

Reply by Becar

2,5 mm? Is that real? You should talk around 0,1 mm. Replace the shaft as soon as possible to prevent catastrophic failure. And yes, you...
Becar

Reply by John from PA

Can you attach the document.txt file as a pdf? I can’t open your document.txt file but no issues with the pdf.
John from PA

Reply by William_C._Foiles

The point raised by Mr. Ngo Dinh regarding reaching thermal equilibrium is crucial to balancing a turbine. I have reviewed some who...
William_C._Foiles

Reply by Ngo Dinh

I think you should provide more information like history, trend of data, time of conducting field balancing comparing to time of FSNL...
Ngo Dinh

Reply by Kishore kumar

Dear Sir , Please contact , one of my contacts have vast experience in Turbine Balancing .So that they will help you mob : 9908111814 /...
Kishore kumar
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