Difference between revisions of "Screw Pumps"

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[[Category:Pumps]]{{Knoppen}}
[[Category:Pumps]]{{Knoppen}}
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[[Image:Lysholm_screw_rotors.jpg|thumb|upright|Screw pump]]
[[Image:Lysholm_screw_rotors.jpg|thumb|upright|Screw pump]]
[[Image:Screw_pump1.gif|thumb|upright|Screw pump]]


A '''screw pump''' is a positive displacement pump that use one or  several screws to move fluids or solids along the screw(s) axis. In its  simplest form (the Archimedes' screw pump),  a single screw rotates in a cylindrical cavity, thereby moving the  material along the screw's spindle. This ancient construction is still  used in many low-tech applications, such as irrigation systems and in  agriculturural machinery for transporting grain and other solids.
A '''screw pump''' is a positive displacement pump that use one or  several screws to move fluids or solids along the screw(s) axis. In its  simplest form (the Archimedes' screw pump),  a single screw rotates in a cylindrical cavity, thereby moving the  material along the screw's spindle. This ancient construction is still  used in many low-tech applications, such as irrigation systems and in  agriculturural machinery for transporting grain and other solids.
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Three-Spindle screw pumps are used for transport of viscous fluids  with lubricating properties. They are suited for a variety of  applications such as fuel-injection, oil burners, boosting, hydraulics,  fuel, lubrication, circulating, feed and so on.
Three-Spindle screw pumps are used for transport of viscous fluids  with lubricating properties. They are suited for a variety of  applications such as fuel-injection, oil burners, boosting, hydraulics,  fuel, lubrication, circulating, feed and so on.


Compared to [[Centrifugal Pumps]],  [[Positive Displacements Pumps]] have several advantages. The pumped  fluid is moving axially without turbulence which eliminates foaming that  would otherwise occur in viscous fluids. They are also able to pump  fluids of higher viscosity without losing flow rate. Also, changes in  the pressure difference have little impact on PD pumps compared to  centrifugal pumps.
Compared to [[Centrifugal Pumps]],  [[Positive Displacement Pumps]] have several advantages. The pumped  fluid is moving axially without turbulence which eliminates foaming that  would otherwise occur in viscous fluids. They are also able to pump  fluids of higher viscosity without losing flow rate. Also, changes in  the pressure difference have little impact on PD pumps compared to  centrifugal pumps.

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