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An Investigation of the Vibration Modes of an External Gear Pump through Experiments and Numerical Modeling

Author

Listed:
  • Sangbeom Woo

    (Maha Fluid Power Research Center, Purdue University, 1500 Kepner Dr., Lafayette, IN 47905, USA)

  • Andrea Vacca

    (Maha Fluid Power Research Center, Purdue University, 1500 Kepner Dr., Lafayette, IN 47905, USA)

Abstract

This paper presents an experimental and numerical modal analysis for an external gear pump considering its mounting on a test rig in a laboratory setting. Most of the previous studies on experimental modal analysis (EMA) of hydraulic pumps focused on the modal frequencies to allow model validation. However, the mode shapes of pump bodies have not extensively been discussed. Furthermore, the nature of the pump components assembly and mounting poses some modeling challenges, such as the uncertain material properties of each component, the behavior of the bolted joints, and some critical modeling boundary conditions related to pump mounting. In this regard, the experimentally obtained vibration modes of a reference pump using the least-square complex exponential (LSCE) method are analyzed with an emphasis on the characteristics of the mode shapes. Then, simple modeling strategies are proposed and validated by performing the analysis from the component level to the full assembly. As a result, the mode shapes are categorized depending on the type of motions that the modes exhibit. It is observed that the pump casing does not show any substantial deformation but is close to the rigid body motion. Moreover, without considerably increasing model complexities, the proposed numerical approach provides reasonable accuracy with average errors in modal frequencies of 6%, as well as good agreement in terms of mode shapes. The vibration reduction strategy is briefly discussed based on the measured mode shapes, and the proposed modeling approaches can be useful to study external gear pumps with minimal model complexities yet allowing reasonable result accuracy.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:796-:d:730832
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    References listed on IDEAS

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    1. Xinran Zhao & Andrea Vacca, 2019. "Theoretical Investigation into the Ripple Source of External Gear Pumps," Energies, MDPI, vol. 12(3), pages 1-26, February.
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    Cited by:

    1. Fábio Antônio do Nascimento Setúbal & Sérgio de Souza Custódio Filho & Newton Sure Soeiro & Alexandre Luiz Amarante Mesquita & Marcus Vinicius Alves Nunes, 2022. "Force Identification from Vibration Data by Response Surface and Random Forest Regression Algorithms," Energies, MDPI, vol. 15(10), pages 1-15, May.
    2. Ionuţ Gabriel Ghionea, 2022. "Applied Methodology for Designing and Calculating a Family of Spur Gear Pumps," Energies, MDPI, vol. 15(12), pages 1-19, June.

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