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Noknroll

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Reply with quote  #1 
I'm in the process of tidying up an inherited database which has peakvue points on some plain bearing motors.
The only thing pkv is really showing me is 2 X LF otherwise nothing to see, I'm tempted to get rid of it.

Edwin

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Reply with quote  #2 
If there are small impacts from looseness or metallic contact I think you will see it first in the pkv, at least from an elevated noise floor. It does on my Envelope measurements with the SKF Micrologs, which is almost the same trick.
So I would suggest to keep it.

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Danny Harvey

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Reply with quote  #3 
I agree.

PeakVue will show running speed and harmonics if they generate "stress waves".

Would getting rid of it save you any time?
Shoveldr

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Reply with quote  #4 
A common issue with Peakvue on motors is the high pass filters are set below rotor bar pass frequency so the demodulation process gives use a dominant 60Hz or 120Hz peak.  That being said, I normally don't do PeakVue on sleeve bearings; supposedly Emerson has been doing a lot of testing and sees value in it, but I haven't seen it.
Ralph Stewart

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Reply with quote  #5 
I do. Found it works well on some motor problems.
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Noknroll

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Reply with quote  #6 
Thanks for your valued opinions, I guess its no problem to leave them there, in fact I've now added pkv to other plain bearing motors for consistency sake and the possibility it will reveal a fault that standard AP set wont see. More tools in the kit as they say.
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