Dynamic loads in rotating members 1

[brandtconroe]

This is for a centrifuge rotating assembly used in the oil field. I know the static load & rpm of the assembly, motor hp & belt tension & the 'product' weight within the centrifuge at any given time. How do I calculate the resultant dynamic load, in order to choose the appropriate bearings at the fixed & floating ends? Is there a method to determine the theoretical axial loads?

 

[zekeman]

You have to make a worst case estimate of the maximum offcenter location of the center of mass of the stuff being rotated and the maximum mass . Then the dynamic force on the bearing assembly would be
mw^2r where
w= angular speed in radians per second
r= distance of center of mass to the rotational centerline
m=mass