The
rotating part, the rotor, has the form of a round rapid motion spiral
spindle with a large pitch. The static element, the stator, is in the
shape of a double- lead interior screw, thereby enabling a double pitch of
the rotor.
Consequently
there are cavities between the rotor and stator which always have the same
size during the rotation of the rotor.
If
the rotor is made to rotate, then these cavities ; and consequently the
substances to be conveyed; are shoved in a screw- like manner from
the suction to the pressure side. The rotors of the PUMPAID mono screw
pumps possess a relatively large eccentricity with respect to the pitch. Whereupon it is possible to convey large solid objects through the pumps
without damage. Furthermore the construction length of the pump is reduced
to a minimum. The relatively small rotor surface with minimum friction
permits a low performance from the pumps.
In
order to transfer this movement from the central one of the drive onto the
rotor it is necessary to have a universal joint- propeller shaft with two
compensating knuckle joints. These universal-joint propeller shafts
connect the drive and the rotor. It is not necessary to have another
bedding for the rotor other than in the stator.
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