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.
Issue Section:
Technical Briefs
References
1.
Litvin
, F. L.
, and Fuentes
, A.
, 2004, Gear Geometry and Applied Theory
, Cambridge University Press
, Cambridge
.2.
Mimmi
, G.
, and Pennacchi
, P.
, 1995, “Design of Three-Screw Positive Displacement Rotary Pumps
,” Proceedings of Contact Mechanics II—Computational Techniques
, Ferrara, Italy
, July 11–13, pp. 401
–411
.3.
Mimmi
, G.
, and Pennacchi
, P.
, 1997, “Determination of Tool Profile for the Milling of Three-Screw Pump Rotors
,” Meccanica
, 32
(4
), pp. 363
–376
.4.
Mimmi
, G.
, and Pennacchi
, P.
, 1997, “Deviations Induced by Tool Sharpening in the Profile of Three Screw Pump Rotors
,” Meccanica
, 32
(6
), pp. 567
–576
.5.
Mimmi
, G.
, and Pennacchi
, P.
, 1998, “Dynamic Effects of Pressure Loads in Three Screw Pump Rotors
,” ASME J. Mech. Des.
, 120
(4
), pp. 589
–592
.6.
Mimmi
, G.
, and Pennacchi
, P.
, 1998, “Computation of Pressure Loads in Three Screw Pump Rotors
,” ASME J. Mech. Des.
, 120
(4
), pp. 581
–588
.7.
Li
, F. T.
, 2010, Screw Pump
, China Machine
, Beijing
.8.
Zheng
, M. S.
, Sun
, Q. Y.
, and Wang
, F.
, 2008, “The Establishment of Parameter Equations About the Rotors’ Profile of Three Screw Pump and Calculating of Slide Ratio Between Conjugate Curves
,” Mech. Eng.
, 2008
(5
), pp. 16
–20
.9.
Su
, S. H.
, Tseng
, and C. H.
, 2000, “Synthesis and Optimization for Rotor Profiles in Twin Rotor Screw Compressors
,” ASME J. Mech. Des.
, 122
(4
), pp. 543
–552
.10.
Wu
, Y. R.
, and Fong
, Z. H.
, 2008, “Rotor Profile Design for the Twin-Screw Compressor Based on the Normal-Rack Generation Method
,” ASME J. Mech. Des.
, 130
(4
), p. 042601
.Copyright © 2011
by American Society of Mechanical Engineers
You do not currently have access to this content.