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Article

Rotor Profiles Synthesis for Lobe Pumps With Given Flow Rate Functions

[+] Author and Article Information
Shih-Hsi Tong, Daniel C. H. Yang

Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095

J. Mech. Des 127(2), 287-294 (Mar 25, 2005) (8 pages) doi:10.1115/1.1798271 History: Received September 27, 2003; Revised March 01, 2004; Online March 25, 2005
Copyright © 2005 by ASME
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References

Dickenson, T. C., 1995, Pumping Manual, 9th ed., Elsevier Science, New York.
Yang,  D. C. H., and Tong,  S. H., 2002, “The Specific Flowrate of Deviation Function Based Lobe Pumps—Derivation and Analysis,” Mech. Mach. Theory, 37, pp. 1025–1042.
Iyoi,  H., and Togashi,  S., 1963, “Formulas to Obtain Flow Rate and Effective Work Ratio of Positive Displacement Pumps and Their Applications to the Design of Gear Pumps,” Trans. Jpn. Soc. Mech. Eng., 29, pp. 1778–1785.
Bidhendi, I. M., Foster, K., and Taylor, R., 1983, “Computer Predictions of Cyclic Excitation Sources for an External Gear Pump,” Computer Aided Design in High Pressure Hydraulic Systems, Mechanical Engineering, London, pp. 23–29.
Mimmi, G., 1992, “Experimental Investigation on Flow Rate Irregularity in an External Gear Pump,” Proceedings, VI ASME International Power Transmission and Bearing Conference, Phoenix, AZ.
Mimmi,  G., and Pennacchi,  P., 1994, “Flow Rate Regularity in Rotary Trochoidal-Lobe Pumps,” ASME Machine Elements and Machine Dynamics,DE-71, pp. 295–302.
Dillon,  M. L., Stclair,  K. A., and Kline,  P. H., 1985, “Prediction Flowrates From Positive Displacement Rotary Pumps,” Chemical Engineering (New York),82.
Costopoulos,  T., Kanarachos,  A., and Pantazis,  E., 1988, “Reduction of Delivery Fluctuation and Optimum Tooth Profile of Spur Gear Rotary Pumps,” Mech. Mach. Theory, 23, pp. 141–146.
Tong,  S. H., and Yang,  D. C. H., 1998, “Generation of Identical Noncircular Pitch Curves,” ASME J. Mech. Des., 120, pp. 337–341.
Tong,  S. H., and Yang,  D. C. H., 2000, “On the Generation of New Lobe Pumps for Higher Pumping Flowrate,” Mech. Mach. Theory, 35, pp. 997–1012.
Yang,  D. C. H., Tong,  S. H., and Lin,  J., 1999, “Deviation-Function Based Pitch Curve Modification for Conjugate Pair Design,” ASME J. Mech. Des., 121, pp. 579–586.
Liu,  H.-C., Tong,  S.-H., and Yang,  D. C. H., 2000, “Trapping-Free Rotors for High Sealing Lobe Pumps,” ASME J. Mech. Des., 122, pp. 536–542.
Tong, S. H., 1998, “New Conjugate Pair Design—Theory and Application,” Ph.D. Dissertation, Mechanical and Aerospace Engineering Department, UCLA.

Figures

Grahic Jump Location
Configuration of a lobe pump
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Pitch pairs and generated pairs
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A schematic diagram of lobe pumps
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Lobe noncircularity chart
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Rotor profiles of lobe pumps with sinusoidal flow rate function
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Sinusoidal flow rate function
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Rotor profiles of lobe pumps with sinusoidal flow rate function (N=3)
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Rotor profiles of lobe pump with fourth-order polynomial flow rate function
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Fourth-order polynomial flow rate function
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Rotor profiles of lobe pump with linear flow rate function
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Linear flow rate function
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Rotor profiles of epitrochoidal lobe pump (constant flow rate)

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