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Theoretical Investigation into the Ripple Source of External Gear Pumps

Author

Listed:
  • Xinran Zhao

    (School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA
    Maha Fluid Power Research Center, Purdue University, Lafayette, IN 47905, USA)

  • Andrea Vacca

    (School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA
    Maha Fluid Power Research Center, Purdue University, Lafayette, IN 47905, USA)

Abstract

External gear pumps are among the most popular fluid power positive displacement pumps, however they often suffer of excessive flow pulsation transmitted to the downstream circuit. To meet the increasing demand of quiet operation for modern fluid power system, a better understanding of the ripple source of gear pumps is desirable. This paper presents a novel approach for the analysis of the ripple source of gear pumps based on decomposition into a kinematic component and a pressurization component. The pump ripple can be regarded as the superposition of the displacement solution and the pressurization solution. The displacement solution is driven by the kinematic flow, and it can be derived from the kinematic flow theory; instead, the pressurization solution can be approximated by overlapping the pressurization flow for a single displacement chamber. Furthermore, in this way the changes of these two components with modification of the delivery circuit are determined in both analytical and numerical ways. The result of this analysis provides a good interpretation of the pulsation simulated by a detailed lumped-parameter simulation model, thus showing its validity. The result also indicates that the response of two ripple sources to the change of the loading in the downstream hydraulic circuit is very different. These findings reveal the limitation of the traditional experimental method for determining the pump ripple, that new experimental methods which are more physics-based can be potentially formulated based on this work.

Suggested Citation

  • Xinran Zhao & Andrea Vacca, 2019. "Theoretical Investigation into the Ripple Source of External Gear Pumps," Energies, MDPI, vol. 12(3), pages 1-26, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:3:p:535-:d:204268
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    Citations

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    Cited by:

    1. Valeriy Sanchugov & Pavel Rekadze, 2022. "New Method to Determine the Dynamic Fluid Flow Rate at the Gear Pump Outlet," Energies, MDPI, vol. 15(9), pages 1-29, May.
    2. Thomas Lobsinger & Timm Hieronymus & Hubert Schwarze & Gunther Brenner, 2021. "A CFD-Based Comparison of Different Positive Displacement Pumps for Application in Future Automatic Transmission Systems," Energies, MDPI, vol. 14(9), pages 1-24, April.
    3. Yu Dai & Feiyue Ma & Xiang Zhu & Qiao Su & Xiaozhou Hu, 2019. "Evaluation and Optimization of the Oil Jet Lubrication Performance for Orthogonal Face Gear Drive: Modelling, Simulation and Experimental Validation," Energies, MDPI, vol. 12(10), pages 1-23, May.
    4. Paolo Casoli & Carlo Maria Vescovini & Fabio Scolari & Massimo Rundo, 2022. "Theoretical Analysis of Active Flow Ripple Control in Positive Displacement Pumps," Energies, MDPI, vol. 15(13), pages 1-22, June.
    5. Miquel Torrent & Pedro Javier Gamez-Montero & Esteban Codina, 2021. "Parameterization, Modeling, and Validation in Real Conditions of an External Gear Pump," Sustainability, MDPI, vol. 13(6), pages 1-20, March.
    6. Miquel Torrent & Pedro Javier Gamez-Montero & Esteban Codina, 2021. "Model of the Floating Bearing Bushing Movement in an External Gear Pump and the Relation to Its Parameterization," Energies, MDPI, vol. 14(24), pages 1-23, December.
    7. Timm Hieronymus & Thomas Lobsinger & Gunther Brenner, 2020. "Investigation of the Internal Displacement Chamber Pressure of a Rotary Vane Pump," Energies, MDPI, vol. 13(13), pages 1-19, June.
    8. Paolo Casoli & Carlo Maria Vescovini & Massimo Rundo, 2023. "One-Dimensional Fluid Dynamic Modeling of a Gas Bladder Hydraulic Damper for Pump Flow Pulsation," Energies, MDPI, vol. 16(8), pages 1-18, April.
    9. Sangbeom Woo & Andrea Vacca, 2022. "An Investigation of the Vibration Modes of an External Gear Pump through Experiments and Numerical Modeling," Energies, MDPI, vol. 15(3), pages 1-22, January.

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