Artisi/Snorgy, sounds like I may have a combination of resonant frequencies, and sump flow dynamics.
Electricpete, Yes the problem vibration occurs when all pumps are running together. Yes, the problem vibration occurs under the same loading condition (i.e. at a certain total flow over all the...
Yes, I have 10816 and like it for it's overall level definitiions.
But I am now looking for something that will define bearing fault development in the freqeuency domain (FFT spectra analysis).
Thank you.
Hello All,
I am looking for an ISO Std for FFT Spectra Vibration, and Bearing Fault Analysis.
I am familiar with the ISO Stds for overall vibration level measurement and acceptance levels. But am looking for one that covers FFT (frequency domain).
I did some searches on the ISO site, and...
Sorry for the slow response...
The pumps are all in a sump.
This problem happens when all the pumps are running.
I will keep an open mind, the research continues...
Thank you for all the help!
Thanks for the info, that is one of the standards I am currently reviewing!
Yes, it is on a VFD, and we can adjust speed. Right now, the speed varies according to inflow, and can sometimes trip out the pump on vibration.
The operators have a few work arounds, but as you surmised, we are...
Hello All,
I am interested in hearing resoning for the minimum range to stay away from resonant frequencies in a pump's operating range.
For some context, the pumps I am interested in are vertically mounted centrifugal pumps on the order of 900 HP, used to pump water (in a wastewater...
