DOI QR코드

DOI QR Code

Development of Rotor for Internal Gear Pump using Cycloid and Polycircular-arc Curves

사이클로이드 및 폴리서클 곡선을 이용한 내접형 기어펌프용 치형 개발

  • Kim, Min-Soo (Creative Engineering System, Pusan National Univ.) ;
  • Lee, Hyun-Woo (Creative Engineering System, Pusan National Univ.) ;
  • Jung, Sung-Yuen (Research Institute of Mechanical Technology, Pusan National Univ.) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan National Univ.)
  • 김민수 (부산대학교 창의공학시스템) ;
  • 이현우 (부산대학교 창의공학시스템) ;
  • 정성윤 (부산대학교 기계기술연구원) ;
  • 김철 (부산대학교 기계기술연구원)
  • Received : 2012.03.21
  • Accepted : 2012.06.20
  • Published : 2012.09.01

Abstract

A new type of gerotor developed in this paper has the inner rotor designed by inserting a polycircular-arc between the hypocycloid and epicycloid curves, and we also suggest that the outer rotor be designed using the closed-form equation for the inner rotor and a method of modification. Thus, it is possible to design a gerotor for which there is no cusp and loop, as in this case undercut is prevented. We developed automated program for rotor design and calculation of the flow rate and flow rate irregularity. And we also demonstrate the superior performance of the gerotor developed in this study by analyzing the internal fluid flow using a commercial computation fluid dynamics-code (CFD).

References

  1. Sasaki, H., Inui, N., Shimada, Y., and Ogata, D., "Development of High Efficiency P/M Internal Gear Pump Rotor (Megafloid Rotor)," Automotive SEI Technical Review, No. 66, pp. 124-128, 2008.
  2. Colbourne, J. R., "Gear Shape and Theoretical Flow Rate in Internal Gear Pumps," Transactions of the CSME, Vol. 3, No. 4, pp. 215-223, 1975.
  3. Saegusa, Y., Urashima, K., Sugimoto, M., Onoda, M., and Koiso, T., "Development of Oil-Pump Rotors with a Trochoidal Tooth Shape," SAE Paper, No. 840454, 1984.
  4. Beard, J. E., Hall, A. S., and Soedel, W., "Comparison of Hypotrochoidal and Epitrochoidal Gerotors," ASME Journal of Mechanical Design, Vol. 113, pp. 133-141, 1991. https://doi.org/10.1115/1.2912761
  5. Fabiani, M., Manco, S., Nervegna, N., and Rundo, M., "Modelling and Simulation of Gerotor Gearing in Lubricating Oil Pumps," SAE Paper, No. 1999-01-0626, 1999.
  6. Mimmi, G. C. and Pennacchi, P. E., "Non-undercutting conditions in internal gears," Mech. Mach. Theory, Vol. 35, No. 4, pp. 477-490, 2000. https://doi.org/10.1016/S0094-114X(99)00028-2
  7. Demenego, A., Vecchiato, D., Litvin, F. L., Nervegna, N., and Manco, S., "Design and simulation of meshing of a cycloidal pump," Mech. Mach. Theory, Vol. 37, No. 3, pp. 311-332, 2002. https://doi.org/10.1016/S0094-114X(01)00074-X
  8. Lee, S. C., "Profile Design of the Inner Rotor of a Gerotor by the Composite Curve of Circular Arcs," Journal of the KSTLE, Vol. 22, No. 2, pp. 79-86, 2006.
  9. Chang, Y. J., Kim, J. H., Jeon, C. H., Kim, C., and Jung, S. Y., "Development of an Integrated System for the Automated Design of a Gerotor Oil Pump," ASME Journal of Mechanical Design, Vol. 129, No. 10, pp. 1099-1105, 2007. https://doi.org/10.1115/1.2757629
  10. Hsieh, C. F. and Hwang, J. H., "Geometric Design for a Gerotor Pump with High Area Efficiency," ASME Journal of Mechanical Design, Vol. 129, No. 12, pp. 1269-1277, 2007. https://doi.org/10.1115/1.2779887
  11. Jung, S. Y., Kim, M. S., and Kim, C., "Development of a New Gerotor for Oil Pumps with Multiple Profiles (Ellipse1, Involute and Ellipse2)," J. of the KSPE, Vol. 28, No. 5, pp. 614-622, 2011.
  12. Choi, T. H., Kim, M. S., Lee, G. S., Jung, S. Y., and Kim, C., "Design of Gerotor Using Cycloid and Circular-Arc Curves," Journal of KSME, Vol. 35, No. 3, pp. 241-250, 2011. https://doi.org/10.3795/KSME-A.2011.35.3.241