Hi all,

I thank who have experienced on diagnostic lobe's blower.

The spectrum shows 1xrpm, 2xrpm 3xrpm and 4xrpm about lobe frecuency. See attached figure. The amplitud in "Vel" ang "Env" are high.

What kind of problems could this represent???

Very thanks.

Fabián

I can not see you plot. You need to resize it before attaching it. You can also copy it and others to a .doc file and attach that.

Depending on the material and the type of blower you could have material build-up on the blower lobes or looseness in the bearing or shaft fits.

Is this a trend, or a sudden onset problem or is this the first time you have looked?

Post TWF's too if you've got them.

Fabian,

Can't see the attachment either, but how high are your readings?

Root calls acceptable all "discrete frequency vibration" below 0.45 ips.

for more info check out the following link

http://www.dresser.com/internet/businessunits/roots/doc...ts/ISRB-2002URAI.pdf

Very helpful link, Elias.

Thanks