Design Of Three-screw Positive Displacement
Rotary Pumps
Author(s)
G. Mimmi & P. Pennacchi
Abstract
Positive displacement rotary Dumps, such as internal and external gear pumps,
usually present an variable instantaneous flow rate. This characteristic
produces undesirable noise and vibrations. On the other hand, three-screw
pumps are usually considered as having a constant instantaneous flow rate, even
if they work in a different way, whereas the working fluid motion is mainly
axial. The three-screw pump operations will be analysed in this paper, starting
from the study of its kinematics and then describing the geometry of the screw
profile and its generation. The instantaneous flow rate generation will be
explained and a simple phenomenological interpretation will be given. Then a
screw profile optimisation will be proposed
Keywords
Related Book
Other papers in this volume
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