eXtreme-förträngning

eXtreme-förträngning

Glossary Right Side Image
Image of a Viking Pump 4223AX Series™ pump sometimes known as an eXtreme positive displacement pump, or XPD.
Abbreviation / Acronym
XPD
Definition
En serie med Viking-innerkugghjulspumpar som har utformats för att uppfylla API 676-krav, -dokumentation och -testning

How does an an eXtreme positive displacement pump work?

An eXtreme positive displacement pump works like any other internal gear pump that Viking Pump offers.

Liquid enters the suction port between the teeth of the rotor gear, which is the larger exterior gear, and the idler gear, the smaller interior gear. The meshing gears of the rotor and idler form locked cavities for the liquid to ensure volume control.

 

Image showing the rotor, idler, and crescent of an eXtreme positive displacement internal gear pump.

 

As the teeth come out of mesh, low pressure zones are created at the suction port which pulls liquid into the spaces. The liquid is trapped between the teeth of the gear-within-a-gear principle and continues to travel through the pump.

Liquid is prevented from returning to the suction side by the crescent located on the head of the pump, acting as a seal between the suction and discharge ports. When the teeth mesh completely, liquid is forced out of the spaces and out of the discharge port.

 

Animation showing how the internals of an eXtreme positive displacement internal gear pump create flow.