Design Eccentricity for Slurry Pump?

[sdz]

I am designing footings for a slurry pump. I want to find the load due to impeller eccentricity using the equation
Fo=m.e.w^2 where
m=impeller mass, e=eccentricity, w=angular speed in radians/sec

Pump Wt~ 8800kg, Speed ~550rpm = 57.6 rads/sec

Does anyone know typical values for "e" or where I can find them?

 

[GregLocock]

Look at the radial tolerance stack on your drawings for the impeller relative to the bearings.

Failing that, less than 0.1 ", more than 0.001"

This assumes a very short overhang, obviously.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[BigInch]

As Greg noted, ecc may increase due to shaft length and its deflection in bending.

BigInch-born in the trenches.

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