Centrifugal and Rotary Pumps
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-183
2025-11-12
15
In centrifugal and rotary pumps, the moving parts have a circular motion only, instead of the reciprocating motion of the piston in the lifting and force pumps. A centrifugal pump is a reversed turbine.
Any reaction turbine, if run backward by power applied to its axle, will force water up the penstock. The supply pipe for a centrifugal pump delivers the water at the middle of the wheel, and the discharge pipe opens from the circumference of the case.
In the rotary pump there are two wheels with interlocking spurs that rotate in opposite directions. Centrifugal pumps are used to furnish a circulation of cold water for steam condensers. Figure 2 shows a motor-driven circulating pump with a capacity of 60,000 gallons per minute through its 48-inch discharge pipe. Various forms of centrifugal pumps are used in vacuum cleaners.
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