Centrifugal pump having an axial thrust balancing system

Details Centrifugal pump having an axial thrust balancing system Centrifugal pump having an axial thrust balancing system

1999-03-12

2000-10-24

Walberg, Teresa

Pumps

Motor driven

Electric or magnetic motor

F04B 1700

Patent

active

061357286

ABSTRACT:
A centrifugal pump includes a housing having a housing cavity, an inlet, and an outlet. A shaft and a radial bearing in the housing cavity are rotatable with respect to one another. An impeller is positioned to receive a fluid from the inlet and to exhaust a fluid to the outlet. The impeller has an impeller recess terminating at an impeller hub with an opening therein. The impeller recess receives the radial bearing. A thrust balancing system includes a thrust balancing valve. The thrust balancing valve has a ring extending from the impeller hub. The ring has an interior region in fluidic communication with the opening. The ring and the shaft are adapted to define a variable-sized vent between the ring and the shaft to balance axial forces upon the impeller under various operating points of the pump and various specific gravities of the pumped fluid.

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Karassik Krutzsch, Fraser, and Messina, Pump Handbook, 2nd. Ed., McGraw-Hill Book Company, pp. 2.53-2.59.
Robert Neumaier, Hermetic Pumps, Gulf Publishing, Houston, Texas, pp. 154-155; 356-359.

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