centrifugal pump


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to centrifugal pump: reciprocating pump

centrifugal pump

[‚sen′trif·i·gəl ′pəmp]
(mechanical engineering)
A machine for moving a liquid, such as water, by accelerating it radially outward in an impeller to a surrounding volute casing.

Centrifugal pump

A machine for moving fluid by accelerating it radially outward. More fluid is moved by centrifugal pumps than by all other types combined. Centrifugal pumps consist basically of one or more rotating impellers in a stationary casing which guides the fluid to and from the impeller or from one impeller to the next in the case of multistage pumps. Impellers may be single suction or double suction. Additional essential parts of all centrifugal pumps are (1) wearing surfaces or rings, which make a close-clearance running joint between the impeller and the casing to minimize the backflow of fluid from the discharge to the suction; (2) the shaft, which supports and drives the impeller; and (3) the stuffing box or seal, which prevents leakage between shaft and casing.

The rotating impeller imparts pressure and kinetic energy to the fluid pumped. A collection chamber in the casing converts much of the kinetic energy into head or pressure energy before the fluid leaves the pump. A free passage exists at all times through the impeller between the discharge and inlet side of the pump. Rotation of the impeller is required to prevent back-flow or draining of fluid from the pump. Because of this, only special forms of centrifugal pumps are self-priming. Most types must be filled with liquid, or primed, before they are started.

Every centrifugal pump has its characteristic curve, which is the relation between capacity or rate of flow and pressure or head against which it will pump. At zero pressure-difference, maximum capacity is obtained, but without useful work. As resistance to flow external to the pump increases, capacity decreases until, at a high pressure, flow ceases entirely. This is called shut-off head and again no useful work is done. Between these extremes, capacity and head vary in a fixed relationship at constant rpm. When the required head exceeds that practical for a single-stage pump, several stages are employed. Multistage pumps range from two-stage pumps to pumps built with as many as 20 or 30 stages for high lifts from relatively small-diameter wells. See Pump, Pumping machinery

centrifugal pump

centrifugal pump
A pump in which the pressure is imparted to the fluid by centrifugal force produced by a rotating impeller.

centrifugal pump

Any pump that uses a high-speed impeller to throw the fluid outward by centrifugal action.
References in periodicals archive ?
Centrifugal pumps will continue to be the most commonly used pump design due to their varied pressure and load handling capabilities -- including the ability to handle liquids with high solids content -- and relatively low maintenance costs.
The calculation of annual energy consumption for centrifugal pumps of various designs was carried out during the analysis of the calculated proportional pressure control mode with the certain declinations of pump control curves (20%, 40%, 60%, 80%, and 100%) (WinCAPS 2011; WiloSelect 2010) (Figure 5).
The largest, construction, continues to be one of the main contributors to China growing economy and is expected to drive an 11% CAGR to 2015 for centrifugal pumps sales.
The CP Series of regenerative turbine pumps generally requires a lower NPSFI than a centrifugal pump and can handle liquids with up to 20 percent entrained gases which is ideal for tank emptying where vortexing or cavitation can occur.
Hot-oil systems heat up to 500 F with 12 to 48 kw and have centrifugal pumps of 1 to 7.
Waukesha Cherry-Burrell, a unit of SPX Corporation, is a major supplier of component equipment including positive displacement and centrifugal pumps, single seat and mix-proof valves, tubular fittings, and Scrape Surface heat exchangers.
com/research/krd29g/analysis_of_the) has announced the addition of Frost & Sullivan's new report "Analysis of the North American Centrifugal Pump Market" to their offering.
Tenders are invited for Moei Cpwd Office Building At Airport Road Hinoo Ranchi During 2015 16 Sh Stic Of Self Priming Centrifugal Pump Set With Minor Repair Of Old Centrifugal Pump Set And Replacement Of 2 Nos Street Light Fitting Etc
This horizontal, sealless ETFE lined centrifugal pump has a permanent magnet drive system and no mechanical seals.
A typical solution on a single 250,000-bpd crude oil pumping station in western Canada--using three rotary PD screw pumps operating in parallel with one standby pump--delivers a 29% reduction in combined capital, energy and maintenance costs over a five-year period, when compared to the traditional centrifugal pump solution of two pumps operating in parallel with one standby pump.
This new model can be applied to any centrifugal pump in a wide range of industrial and municipal applications.