Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Performance Improvement of Oil Pump by Design of Gerotor (Combined Profile - Two Ellipses) and Port

지로터(2개의 타원 조합) 형상 및 포트 설계를 통한 오일펌프 성능인자 향상

  • Kwak, Hyo Seo (Department of Creative Engineering, Pusan National University) ;
  • Li, Sheng Huan (Department of Creative Engineering, Pusan National University) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan National University)
  • 곽효서 (부산대학교 창의공학시스템학과) ;
  • 이승환 (부산대학교 창의공학시스템학과) ;
  • 김철 (부산대학교 기계기술연구원)
  • Received : 2015.09.03
  • Accepted : 2016.01.26
  • Published : 2016.03.01
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Abstract

A gerotor is suitable for miniature manufacturing because it has high discharge per 1 cycle and a simple structure, while also being widely used for lubrication oil of engines and as a hydraulic source of automatic transmission. In the automobile industry, improvements in fuel efficiency and noise reduction have recently come to the fore. It has also been necessary to continuously improve the flow rate and noise of internal gear pumps for better fuel efficiency through optimal gerotor and port shape design. In this study, to develop an optimal gerotor with a new lobe shape, 2-ellipses-combined, the equation of the lobe shape was derived, and CFD analysis results were compared for 2-ellipses with those of the previous gerotors (3-ellipses and ellipse1-involuteellipse2). A performance test for the oil pump with the optimal rotor (2-ellipses) was carried out and showed good agreement with the results obtained from CFD analysis.

Keywords

References

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  1. Performance improvement of an oil pump: Design of port assembled with gerotor (2-ellipses-combined lobe) vol.17, pp.8, 2016, https://doi.org/10.1007/s12541-016-0124-7
  2. Optimal Design of Gerotor (Ellipse1-Elliptical Involute-Ellipse2 Combined Lobe Shape) for Improving Fuel Efficiency and Reducing Noise vol.33, pp.11, 2016, https://doi.org/10.7736/KSPE.2016.33.11.927
  3. Design of port shape for reducing irregularity of oil pump vol.31, pp.12, 2017, https://doi.org/10.1007/s12206-017-1126-9
  4. Theoretical investigation of the effect of a relief groove on the performance of a gerotor oil pump vol.32, pp.8, 2018, https://doi.org/10.1007/s12206-018-0721-8