Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지
DOI QR코드

DOI QR Code

Optimal Design of Gerotor (Ellipse1-Elliptical Involute-Ellipse2 Combined Lobe Shape) for Improving Fuel Efficiency and Reducing Noise

연비개선 및 소음저감을 위한 지로터 최적설계 (타원 1-타원형 인벌루트-타원2)

  • Kwak, Hyo Seo (Department of Mechanical Convergence Technology, Pusan National University) ;
  • Li, Sheng Huan (Department of Mechanical Convergence Technology, Pusan National University) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan National University)
  • 곽효서 (부산대학교 기계융합기술협동과정) ;
  • 이승환 (부산대학교 기계융합기술협동과정) ;
  • 김철 (부산대학교 기계기술연구원)
  • Received : 2016.03.24
  • Accepted : 2016.09.02
  • Published : 2016.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

A gerotor is suitable for miniature manufacturing because it has a high discharge per cycle and a simple structure, while also being widely used as lubrication oil of engines and the hydraulic source of automatic transmission. In the automobile industry, it has been necessary to continuously improve the flow rate and noise of internal gear pumps for better fuel efficiency through optimal gerotor design. In this study, to obtain an optimal gerotor with an ellipse-elliptical involute-ellipse combined lobe shape, an automatic program was developed for calculating performance parameters and drawing a gerotor profile. An oil pump was assembled with the optimal gerotor together with the port used at the actual field and CFD analysis was performed on this assembly using Ansys-CFX. A performance test for the oil pump was carried out and showed good agreement with the results obtained from the theoretical analysis and the CFD analysis.

Keywords

References

  1. Jang, J. and Yoon, Y., “Automatic Profile Generation System Development for a Gerotor Tooth Design,” Journal of Drive and Control, Vol. 9, No. 4, pp. 79-87, 2012.
  2. Fabiani, M., Manco, S., Nervegna, N., Rundo, M., Armenio, G., et al., "Modelling and Simulation of Gerotor Gearing in Lubricating Oil Pumps," SAE Technical Paper, 1999.
  3. Mimmi, G. C. and Pennacchi, P. E., “Non-Undercutting Conditions in Internal Gears,” Mechanism and Machine Theory, Vol. 35, No. 4, pp. 477-490, 2000. https://doi.org/10.1016/S0094-114X(99)00028-2
  4. Demenego, A., Vecchiato, D., Litvin, F. L., Nervegna, N., and Manco, S., “Design and Simulation of Meshing of a Cycloidal Pump,” Mechanism and Machine Theory, Vol. 37, No. 3, pp. 311-332, 2002. https://doi.org/10.1016/S0094-114X(01)00074-X
  5. Lee, S.-C., “Profile Design of the Inner Rotor of a Gerotor by the Composite Curve of Circular Arcs,” Journal of the Korean Society of Tribologists and Lubrication Engineers, Vol. 22, No. 2, pp. 79-86, 2006.
  6. 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.
  7. 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. Korean Soc. Precis. Eng., Vol. 28, No. 5, pp. 614-622, 2011.
  8. Bae, J. H., Bae, W. B., Joo, U. T., and Kim, C., “Optimal Design of Rotor Profile of Internal Gear Pump for Noise Reduction,” Transactions of the Korean Society of Mechanical Engineers A, Vol. 38, No. 3, pp. 295-302, 2014. https://doi.org/10.3795/KSME-A.2014.38.3.295
  9. Kwak, H. S., Li, S. H., and Kim, C., “Optimal Design of Gerotor with Combined Lobe Profiles (Ellipse 1-Elliptical Involute-Ellipse 2),” Transactions of the Korean Society of Mechanical Engineers A, Vol. 39, No. 12, pp. 1237-1244, 2015. https://doi.org/10.3795/KSME-A.2015.39.12.1237
  10. Bae, J. H., Kwak, H. S., San, S., and Kim, C., “Design and CFD Analysis of Gerotor with Multiple Profiles (Ellipse-Involute-Ellipse Type and 3-Ellipses Type) Using Rotation and Translation Algorithm,” Proc. of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Vol. 230, No. 5, pp. 804-823, 2016. https://doi.org/10.1177/0954406215583888
  11. Kwak, H. S., Li, S. H., and Kim, C., “Performance Improvement of Oil Pump by Design of Gerotor (Combined Profile-Two Ellipses) and Port,” J. Korean Soc. Precis. Eng., Vol. 33, No. 3, pp. 207-216, 2016. https://doi.org/10.7736/KSPE.2016.33.3.207
  12. Kim, C. S., Lee, K. J., and Shin, M. J., “Study of the Dynamic Characteristics of a High-Pressure Labyrinth Seal Considering Rotor Whirling,” J. Korean Soc. Precis. Eng., Vol. 32, No. 8, pp. 713-718, 2015. https://doi.org/10.7736/KSPE.2015.32.8.713

Cited by

  1. Design of port shape for reducing irregularity of oil pump vol.31, pp.12, 2017, https://doi.org/10.1007/s12206-017-1126-9