Journal of Mechanical Science and Technology

, Volume 32, Issue 2, pp 671–678 | Cite as

Design and experimental verification of a port plate in a gerotor pump to reduce pressure pulsation

  • Hee-Jee Sung
  • Hyung-Ki Min
  • Yun-Joo Nam
  • Myung-Kwan ParkEmail author


In a gerotor pump, pressure pulsation occurs in a chamber through contact with the internal and external rotors. This causes an overhung load on the pump shaft bearing and cavitation, which affect the durability and noise of the pump. In this study, relief grooves on the port plate were designed to reduce pressure pulsation and verified experimentally. The opening areas between the port plate and chamber with and without relief grooves were obtained. The relation between the pressure pulsation and relief grooves was examined through a simulation and verified experimentally. The results indicated that the relief grooves were very effective at reducing and stabilizing the pressure pulsation of the pump outlet and in the chamber. Thus, installing relief grooves on the port plate can improve the durability of the pump and allow the size of the motor coupled with the pump to be reduced.


Gerotor pump Relief groove Port plate Pressure pulsation Torque pulsation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    S. Mancò, N. Nervegna, M. Rundo, G. Armenio, C. Pachetti and R. Trichilo, Gerotor lubricating oil pump for IC engines, SAE Transactions, 107 (3) (1998) 2267–2283.Google Scholar
  2. [2]
    P. J. Gamez-Montero, R. Castilla, D. del Campo, N. Ertürk, G. Raush and E. Codina, Influence of the interteeth clearances on the flow ripple in a gerotor pump for engine lubrication, Proc. of the Institution of Mechanical Engineers, 226 (7) (2012) 930–942.CrossRefGoogle Scholar
  3. [3]
    E. Frosina, A. Senatore, D. Buono and L. Santato, Analysis and simulation of an oil lubrication pump for internal combustion engines, Journal of Fluids Engineering, 137 (5) (2015) 051102.CrossRefGoogle Scholar
  4. [4]
    T. H. Choi, M. S. Kim, G. S. Lee, S. Y. Jung, J. H. Bae and C. Kim, Design of rotor for internal gear pump using cycloid and circular-arc curves, Journal of Mechanical Design, 134 (1) (2012) 011005.CrossRefGoogle Scholar
  5. [5]
    M. Suresh Kumar and K. Manonmani, Computational fluid dynamics integrated development of gerotor pump inlet components for engine lubrication, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 224 (12) (2010) 1555–1567.Google Scholar
  6. [6]
    E. Frosina, A. Senatore, D. Buono, M. U. Manganelli and M. Olivetti, A tridimensional CFD analysis of the oil pump of an high performance motorbike engine, Energy Procedia, 45 (2014) 938–948.CrossRefGoogle Scholar
  7. [7]
    M. S. Kumar and K. Manonmani, Numerical and experimental investigation of lubricating oil flow in a gerotor pump, International Journal of Automotive Technology, 12 (6) (2011) 903–911.CrossRefGoogle Scholar
  8. [8]
    C. F. Hsieh, Fluid and dynamics analyses of a gerotor pump using various span angle designs, Journal of Mechanical Design, 134 (12) (2012) 121003.CrossRefGoogle Scholar
  9. [9]
    H. Ding, X. J. Lu and B. Jiang, A CFD model for orbital gerotor motor, IOP Conference Series: Earth and Environmental Science, 15 (6) (2012) 062006.CrossRefGoogle Scholar
  10. [10]
    H. S. Kwak, S. H. Li and C. Kim, Performance improvement of an oil pump: Design of port assembled with gerotor (2-ellipses-combined lobe), International Journal of Precision Engineering and Manufacturing, 17 (8) (2016) 1017–1024.CrossRefGoogle Scholar
  11. [11]
    G. Jacazio and A. De Martin, Influence of rotor profile geometry on the performance of an original low-pressure gerotor pump, Mechanism and Machine Theory, 100 (2016) 296–312.CrossRefGoogle Scholar
  12. [12]
    C. Hao, W. Yang and G. Liu, Design of gerotor oil pump with new rotor profile for improving performance, Proc. of the Institution of Mechanical Engineers, 230 (4) (2015) 592–601.Google Scholar
  13. [13]
    Hsieh and Chiu-Fan, Flow characteristics of gerotor pumps with novel variable clearance designs, Journal of Fluids Engineering, 137 (4) (2015) 041107.CrossRefGoogle Scholar
  14. [14]
    S. Y. Kim, Y. J. Nam and M. K. Park, Design of port plate in gerotor pump for reduction of pressure pulsation, Journal of Mechanical Science and Technology, 20 (10) (2006) 1626–1637.CrossRefGoogle Scholar
  15. [15]
    M. Fabiani, S. Mancò, N. Nervegna, M. Rundo, G. Armenio, C. Pachetti and R. Trichilo, Modelling and simulation of gerotor gearing in lubricating oil pumps, SAE Transactions108 (3) (1999) 989–1003.Google Scholar
  16. [16]
    H. E. Merritt, Hydraulic control systems, John Wiley & Sons, New Jersey, USA (1967).Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Hee-Jee Sung
    • 1
  • Hyung-Ki Min
    • 1
  • Yun-Joo Nam
    • 2
  • Myung-Kwan Park
    • 1
    Email author
  1. 1.Department of Mechanical EngineeringPusan National UniversityPusanKorea
  2. 2.Construction Equipment Technology CenterKorea Institute of Industrial TechnologyCheonanKorea

Personalised recommendations