Centrifugal Pumps Design and Application 2nd ed - Val S. Lobanoff, Robert R. Ross (Butterworth-Heinemann, 1992)

D
(with
subscript)
P D
P s
T
T
(with
subscript)
U
(with
subscript)
sp gr
Shaft Design and Axial Thrust 353
Diameter of cross section as indicated by subscript (in.).
Differential pressure (psi).
Suction pressure (psi).
Net axial thrust (Ib).
Axial thrust in direction as indicated by subscript. (Ib)
Peripheral velocity at diameter indicated by subscript
(ft/sec) = D X RPM/229.
Specific gravity.
g 32.2 ft/sec 2 (constant used in calculation for Figures 16-14
and 16-16)
7 Fluid density of water lb/ft 3 (constant used in calculation
for Figures 16-14 and 16-16.
F x
Q
Thrust due to momentum change (Ib)
= (Q 2 x sp gr)/A E X 722
GPM
References
Peterson, R. E., Stress Concentration Factors, John Wiley and Sons,
Inc., New York, 1974.
Roark, R. J., and Young, W. C., Formula For Stress and Strain, 5th edition,
McGraw-Hill, Inc., 1975.
Shigley, J. E. Mechanical Engineering Design, 3rd edition, McGraw-
Hill, Inc., 1977.