Sign up Calendar Latest Topics Donate
 
 
 


Reply
  Author   Comment  
JuddJones

Sr. Member
Registered:
Posts: 382
Reply with quote  #1 
Saw this on Linkedin today. Why am I always the 2nd person to think of this stuff???
vibes.png   

John from PA

Sr. Member
Registered:
Posts: 963
Reply with quote  #2 

"Truly novel inventions emerge only in one's youth. Later one becomes ever more experienced, famous-and foolish."

--Einstein


 

 

 
ivibr8

Sr. Member
Registered:
Posts: 163
Reply with quote  #3 
LOL
I am here to admit I spent about 45 sec trying to figure out what was so ingenious about the spectrum

then I read the caption

Touche
dnk

Member
Registered:
Posts: 63
Reply with quote  #4 
One thing to remember is you don't always have an increase of amplitude to indicate a worsening problem.
 I have seen bearings with very low amplitude but with harmonics and side bands that have failed without high amplitudes.
OLi

Sr. Member
Registered:
Posts: 1,915
Reply with quote  #5 
And if you have had a increasing trend on bearing fault and or bearing temp in whatever way and it start to drop, that is your final warning IMHO as it may depend on that friction is getting lower inside due to the reduced number of parts remaining rotating or remaining generally speaking, at least sometimes and when it get totally noiseless and all rotating parts are spread on the floor, that's not good either.
__________________
Good Vibrations since early 1950's, first patented vibrometer 1956 in the US.
http://www.vtab.se
Walt Strong

Sr. Member
Registered:
Posts: 889
Reply with quote  #6 
The caption obviously does not apply to the image of spectrum plot, since no increase in vibration is indicated and no amplitude scale is provided. Fake News!

Walt
RGf

Sr. Member
Registered:
Posts: 78
Reply with quote  #7 
Reminds me of one of my former bosses-he didn't want to know what the vibe signature was telling us-just the overall vibration level. No increase=no problem. I think he learned that in the Navy a long long time ago. I used to give him printouts of TWFs just to poke at him. Lots o' fun.
MarkL

Avatar / Picture

Sr. Member
Registered:
Posts: 1,121
Reply with quote  #8 
Have to admit I looked at this for 5 minutes trying to find this revolutionary article...then realised It was 'vibration for morons' and then I recall seeing the graph Saturday night on linkeidn and seen who was reposting it........ Pretty much speaks for itself.
RGf

Sr. Member
Registered:
Posts: 78
Reply with quote  #9 
I always keep the Oil Analysis for Dummies book handy in case someone asks a oil related question-it gets a great response.
spciesla

Sr. Member
Registered:
Posts: 107
Reply with quote  #10 
Took me a few moments as well.  Too funny!
Walt Strong

Sr. Member
Registered:
Posts: 889
Reply with quote  #11 
Here is a link to the full article:

http://www.ecmweb.com/electrical-testing/tip-week-motors-and-vibration-part-1

Walt
Edwin

Avatar / Picture

Sr. Member
Registered:
Posts: 131
Reply with quote  #12 
First it says: "Vibration monitoring, if done correctly, will alert you to an increase in vibration"
Next it says: "you never want to use vibration testing to take the place of other testing you should be doing"

If the vib measurement does not cover all the mentioned problems, why do it than anyway? 
I am truely convinced that a good vibration measurement program covers all, at least mechanical, problems.

Seems to me that this Mark just wants to sell as much testing and maintenance as possible...

__________________
= Cost Effective Asset Management =
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.