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CFD Analyses of Textured Surfaces for Tribological Improvements in Hydraulic Pumps

Author

Listed:
  • Paolo Casoli

    (Department of Engineering and Architecture, University of Parma, 43124 Parma, Italy)

  • Fabio Scolari

    (Department of Engineering and Architecture, University of Parma, 43124 Parma, Italy)

  • Massimo Rundo

    (Department of Energy, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Turin, Italy)

  • Antonio Lettini

    (Casappa Ltd., Via Balestrieri 1, Lemignano di Collecchio, 43044 Parma, Italy)

  • Manuel Rigosi

    (Casappa Ltd., Via Balestrieri 1, Lemignano di Collecchio, 43044 Parma, Italy)

Abstract

In any hydraulic machine there are lubricated couplings that could become critical beyond certain operating conditions. This paper presents the simulation results concerning textured surfaces with the aim of improving the performance of lubricated couplings in relative motion. The texturing design requires much care to obtain good improvements, and it is essential to analyze both the geometric features of the dimples and the characteristics of the coupled surfaces, like the sliding velocity and gap height. For this purpose, several CFD simulations have been performed to study the behavior of the fluid bounded in the coupling, considering dimples with different shapes, size, and spatial distribution. The simulations consider the onset of gaseous cavitation to evaluate the influence of this phenomenon on the pressure distribution generated by the textured surface. The analyses have pointed out that it is critical to correctly predict the behavior of the textured surface in the presence of local cavitation, in fact, when cavitation occurs, the characteristic time of the transient in which the phase of the fluid change is very rapid and it is comparable to the time taken by the fluid to move from one dimple to the next.

Suggested Citation

  • Paolo Casoli & Fabio Scolari & Massimo Rundo & Antonio Lettini & Manuel Rigosi, 2020. "CFD Analyses of Textured Surfaces for Tribological Improvements in Hydraulic Pumps," Energies, MDPI, vol. 13(21), pages 1-22, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:21:p:5799-:d:440591
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    References listed on IDEAS

    as
    1. Massimo Rundo & Giorgio Altare & Paolo Casoli, 2019. "Simulation of the Filling Capability in Vane Pumps," Energies, MDPI, vol. 12(2), pages 1-18, January.
    2. Paolo Casoli & Andrea Bedotti & Federico Campanini & Mirko Pastori, 2018. "A Methodology Based on Cyclostationary Analysis for Fault Detection of Hydraulic Axial Piston Pumps," Energies, MDPI, vol. 11(7), pages 1-19, July.
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    Citations

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    Cited by:

    1. Dmitry Eskin, 2022. "On CFD-Assisted Research and Design in Engineering," Energies, MDPI, vol. 15(23), pages 1-3, December.
    2. 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.
    3. Paolo Casoli & Fabio Scolari & Massimo Rundo, 2021. "Modelling and Validation of Cavitating Orifice Flow in Hydraulic Systems," Sustainability, MDPI, vol. 13(13), pages 1-15, June.

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