In this paper a method for the design of new rotor profiles for high-sealing lobe pump is presented. The objective of this research is to improve the sealing property of lobe pumps by designing chamber profile conforming rotors. The deviation function method is adopted for the design. The resultant rotors are trapping-free and have $C1$ continuity. A design procedure for rotor generation is also developed. A sealing index is defined to evaluate the sealing property of lobe pumps. Our results show that it is possible to design many new rotor profiles that have better sealing property than conventional involute rotors. [S1050-0472(00)01304-0]

1.
Dickenson, T. C., 1995, Pumping Manual, Elsevier Science LTD.
2.
Warring, R. H., 1984, Pumps: Selection, Systems and Applications, 2nd Ed., Gulf Publishing Company.
3.
Cheremisiroff, N. P., and Cheremisiroff, P. N., 1992, Pumps and Pumping Operations, Prentice Hall, Englewood Cliffs, NJ.
4.
Mimmi, G. C., and Pennacchi, P. E., 1998, “Computation of Pressure Loads in the Three-Lobe Supercharger,” MECH 5832, ASME Design Engineering Technical Conferences, Sep. 13–16, Atlanta, GA.
5.
Fox, R. W., and McDonald, A. T., 1992, Introduction to Fluid Mechanics, John Wiley & Sons, New York.
6.
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
, No.
4
, pp.
579
586
.
7.
Tong, S.-H., 1998, “New Conjugate Pair Design—Theory and Application,” dissertation UCLA, Department of Mechanical and Aerospace Engineering.