Improving Gerotor Pump Performance Trough Design, Modeling and Simulation

  • Lozica Ivanović University of Kragujevac, Faculty of Engineering, 34000 Kragujevac, Serbia
  • Miloš Matejić University of Kragujevac, Faculty of Engineering, 34000 Kragujevac, Serbia
Keywords: Trochoidal gearing;, gerotor pump;, volumetric flow rate;, contact stress, wear rate proportional factor


Gerotor pumps are well known by a compact design, simple structure and low noise level, which makes them suitable for use in the automotive industry, and especially in hydraulic systems for engine lubrication. One of the main disadvantages of gerotor pumps is the inability to adjust to wear, which significantly reduces the pump efficiency. In order to mitigate the negative effect of the inevitable wear process, this paper presents a methodology for determining the optimal combination of trochoid gears design parameters for a defined aspect. An appropriate mathematical model has been developed to analyze the effect of changes in gear design parameters in relation to maximum contact stresses, pressure changes in gerotor pump chambers and wear rate proportional factor (WRPF). Verification of the developed models was performed by realizing physical pairs of gears and laboratory experiments with simulation of pump operating conditions. The results and conclusions presented in this paper, with an emphasis on the actual work processes, bring very important perspectives for the gerotor pumps design with improved performance.


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Author Biographies

Lozica Ivanović, University of Kragujevac, Faculty of Engineering, 34000 Kragujevac, Serbia

Lozica Ivanović is a professor at the University of Kragujevac, Faculty of Engineering, Serbia. She received her Ph.D. in mechanical engineering from University of Kragujevac in 2007. Her research interests includes: mechanical design, generating special tooth profile applied in mechanical construction, especially trochoidal profile, analysis and design of gerotor pump, industrial design. She is Editor of journal Applied Engineering Letters.

Miloš Matejić, University of Kragujevac, Faculty of Engineering, 34000 Kragujevac, Serbia

Miloš Matejić is an assistant professor at the University of Kragujevac, Faculty of Engineering , Serbia. He received his Ph.D. in mechanical engineering from University of Kragujevac in 2019. His research interests includes: machine elements, power transmission, CAD and expert systems in machine design. He is reviewer in one journal publishing by Springer, and one journal publishing by Elsevir.


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