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Practical Centrifugal Pumps
book

Practical Centrifugal Pumps

by Paresh Girdhar, Octo Moniz
April 2011
Beginner to intermediate content levelBeginner to intermediate
264 pages
8h 24m
English
Newnes
Content preview from Practical Centrifugal Pumps
86 Practical Centrifugal Pumps
4.2.2 Calculating shaft deflection
Shaft deflection is calculated by treating the shaft as a cantilever beam using an expanded
version of the beam formula (Figure 4.13). The formula for the deflection of a shaft with
three major diameters in the overhung section is as given below.
333332
CB A L
3
PC B C A B A L
EI I I I
δ

−−×
=+ ++


Figure 4.13
Calculating shaft deflection
Where
ABCL
= Shaft Deflection
P = Radial Resultant force
E = Young's Modulus Modulus of Elasticity of the shaft material
A, B, C, L = Distances from impeller as shown in the figure above
I , I , I , I = Moments
δ
of Inertia at various diamet ...
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Publisher Resources

ISBN: 9780080480145