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Difference between revisions of "Positive Displacement Pumps"
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Positive Displacement Pumps (view source)
Revision as of 02:42, 15 March 2012
, 02:42, 15 March 2012no edit summary
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* Please start editing this page after the /noinclude | * Please start editing this page after the /noinclude | ||
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[[Image:Drehkolbenpumpe.jpg|thumb||right|A lobe pump]] | [[Image:Drehkolbenpumpe.jpg|thumb||right|A lobe pump]] | ||
[[Image:423px-Common_Lobe_Pump.png|thumb|right|upright|lobe pump internals]] | [[Image:423px-Common_Lobe_Pump.png|thumb|right|upright|lobe pump internals]] | ||
[[Image:Two_moving_spirals_scroll_pump.gif|thumb|Mechanism of a scroll pump]] | [[Image:Two_moving_spirals_scroll_pump.gif|thumb|Mechanism of a scroll pump]] | ||
A | A '''Positive Displacement Pump''' causes a fluid to move by trapping a fixed amount of it and then forcing (displacing) that trapped volume into the discharge pipe. | ||
Some positive displacement pumps work using an expanding cavity on the suction side and a decreasing cavity on the discharge side. Liquid flows into the pump as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. The volume is constant given each cycle of operation. | Some positive displacement pumps work using an expanding cavity on the suction side and a decreasing cavity on the discharge side. Liquid flows into the pump as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. The volume is constant given each cycle of operation. | ||