External Pressurized Lubrication System

[rotaryguy]

Hello guys,

Is there way to define like above certain horsepower assuming 800HP, we need the external lubrication system for bearing ?

 

[Artisi]

You haven't said what type of pump (assuming it is a pump)what type of bearings and their installation configuration etc. A bit more info might get more meaningful input.

 

[rotaryguy]

hi artisi,

pump is Centerline mounted end suction pump oh2, with antifriction bearing single row, deep groove, radial bearings and duplex, single row, 40° angular contact thrust bearings. i wondering which are criteria to select ext. lub system?

 

[Artisi]

Hi rotaryguy

Not really my area of expertise, doesn't sound all that difficult for a standard oil lub system unless there is a heat removal problem, however, my suggestion would be to contact either the pump manufacturer or one of the major bearing manufacturers for their advice.

 

[NGLENGR]

Rotaryguy,

At my facility we have several 1000+ bhp installations which use splash lubricated bearings with no difficulties. However, these are BB3 pumps which do have different rotordynamic characteristics than the OH2 pumps.

I would contact the pump OEM and determine what the pump needs.

Are you having bearing problems in this particular installation and believe an external system would work best? Sometimes a bearing problem is a symptom of something else. We had a rash of bad thrust bearings in some BB3 pumps after they had been re-staged. Turned out the pump shop induced a hydraulic thrust imbalance by blanking the wrong stage.

 

[rotaryguy]

Txs NGLENGR and Artisi, I have do to some investigation like 007.