RANGER1
21-10-2014, 09:18 PM
Client request a visit to site to check out a noise never heard before on plant over 30 years old.
Asked them to check a few things like coupling, load, unload machine to see if noise changes, check motor bearings, grease etc.
Recently before this we carried out at clients request basic drive rotor end play check (never been asked this before, opposition do it apparently).
The guy who did it claims to get end play movement of 0.05mm or 0.002" each way.
So this sounds suspect of course & is in the back of my mind.
Site 3-4 hours away, so checked out taking laser alignment gear.
This machine is a booster & normally very quite.
Arrive at front gate & can hear it, like a high velocity or high resonance sound.
Check coupling, found compressor hub a bit loose,tighten, check alignment all resonable, motor bearings noisy & need attention.
Noise when running was most prominent in oil separator.
Isolate, check out oil sep, remove inspection cover, all looks good.
Client advised no more than usual oil consumption or carry over into system.
Client had new coalesces sitting on floor next to it, so suggest we change them as we haven't
really found anything.
Change & apparently problem solved.
I have never heard of this one before, never really looked at old filters as it's all history now.
As far as end play after tightening coupling hub, problem possibly gone.
Asked them to check a few things like coupling, load, unload machine to see if noise changes, check motor bearings, grease etc.
Recently before this we carried out at clients request basic drive rotor end play check (never been asked this before, opposition do it apparently).
The guy who did it claims to get end play movement of 0.05mm or 0.002" each way.
So this sounds suspect of course & is in the back of my mind.
Site 3-4 hours away, so checked out taking laser alignment gear.
This machine is a booster & normally very quite.
Arrive at front gate & can hear it, like a high velocity or high resonance sound.
Check coupling, found compressor hub a bit loose,tighten, check alignment all resonable, motor bearings noisy & need attention.
Noise when running was most prominent in oil separator.
Isolate, check out oil sep, remove inspection cover, all looks good.
Client advised no more than usual oil consumption or carry over into system.
Client had new coalesces sitting on floor next to it, so suggest we change them as we haven't
really found anything.
Change & apparently problem solved.
I have never heard of this one before, never really looked at old filters as it's all history now.
As far as end play after tightening coupling hub, problem possibly gone.