Abstract
This paper presents a new edge blunting method of the three screw pump rotor with an elliptic arc and equations of the rotor profile after edge blunting. Through comparisons of different geometrical parameters of the pump, i.e., flow area, contact line length per lobe, blow hole area, etc., the new profile is proved to be better than the existing profiles of the three screw pump. The new streamlined profile, with a significantly smaller blow hole area, is of reference significance for the optimization design and further improvement of three screw pump.
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