quote:
Originally posted by bruce381:
what filtering is on line
20um in line filters (no bypass), with a 5um on the centrifuge loop (tank back to tank).
quote:
Originally posted by bruce381:
were is/was gunk from
not sure, as we've only seen it in one unit, and only in the centrifuge.
quote:
Originally posted by bruce381:
what are the TAN numbers on the oil
what is your idea of a good rbot?
TAN, I don't know.
RBOTs have all been 250mins plus (see continuous oil change above)
quote:
Originally posted by bruce381:
vibration anylisis or wear metal show any bearing problems on turbine?
We had a big rub 5 years ago, and also had a wipe on a few bearings as a result. We dollied them up at the time as there was no maintenance window to fix them, and the wipes were very small.
No wear metals evident since, and bearing temps are good.
Vibration is above what I'd like, but the orbits look OK (but big), no sign of constraint, and no whirl.
When barred, the alignments look OK.
quote:
Originally posted by bruce381:
what does spectro of gunk show? metals, dirt,
boiler water treatment chemicals of any kind?
contamination of wrong oil added in past
bruce
gunk results are on the way.
boiler water treatment is purely ammonia. We had an issue with colloidal silica (and therefore steam carry over) a few months back, but both units recieved the water, only one has varnish.
Both units have a common oil supply tank, with bulk delivery. Problem should show in both.
The whole thing comes apart in April for maintenance, so we'll see what we can see.