Centrifugal Pump Bearing Housing Coling

[FAIZANYOUSUF]

Hello all,

I would like to know how much should the pressure difference of cooling water be across bearing housing of a single stage radially split overhung centrifugal pumps? Is there a code for this?

thanks

 

[Artisi]

Sufficient preassure to achieve the flowrate necessary for effective cooling.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[JJPellin]

Direct cooling of the bearing housing is not recommended. If you have a cast-in cooler surrounding the bearing, I would recommend removing the cooling water. A cooler can be used to cool the oil in the bottom of the sump. I am not aware of any generic rule of thumb regarding the cooling water differential pressure required for this sort of oil cooler. As Artisi noted, the DP needs to be sufficient to provide enough cooling for the housing to run at an acceptable temperature.

Johnny Pellin

 

[mk3223]

IMO, the required P&T of the cooling water should be based on the pump specification from the Manufacturer, instead of the Code. And then, you may size the proper cooling supply & return piping based on the required flow rate for the cooling purpose.

 

[electricpete]

Direct cooling of the bearing housing is not recommended. If you have a cast-in cooler surrounding the bearing, I would recommend removing the cooling water. A cooler can be used to cool the oil in the bottom of the sump

Good point, considering the phrasing of the question. I would add (for benefit of op) that the reason is to avoid excessive reduction of bearing clearance from cold housing.

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(2B)+(2B)' ?

 

[FAIZANYOUSUF]

Thanks all

I also want to confirm about the code that's why asked. However if we donot have manufacturer data then how are we going to determine flowrate? And how differential pressure then can be calculated?