Archives of Acoustics, 49, 1, pp. 49–60, 2024

Study on Mechanism and Suppression Method of Flow-Induced Noise in High-Speed Gear Pump

ORCID ID 0000-0001-6562-3645
Lanzhou University of Technology

Lanzhou University of Technology

Zhiyuan JIANG
Lanzhou University of Technology

Runxue YANG
Lanzhou University of Technology

Liejiang WEI
Lanzhou University of Technology

The flow-induced noise mechanism of a 5000 rpm high-speed gear pump is explored. On the basis of the CFD technology and the Lighthill acoustic analogy theory, a numerical model of the flow-induced noise of a high-speed gear pump is constructed, and the effect of oil suction pressure (0.1–0.2 MPa) on the internal flow field and flow-induced noise characteristics of the high-speed gear pump is investigated. To evaluate the accuracy of the numerical simulation, a noise testing platform for high-speed gear pumps was developed. Adding an oil replenishment groove to the high-speed gear pump suppresses its flow-induced noise. The results indicate that the discrete noise at the fundamental frequency and its harmonic frequency is the primary component of the flow-induced noise of the pump and that the oil-trapped area is the principal source of vibration. The overall sound pressure level of flow-induced noise in the inlet and outlet areas decreases with distance from the oil-trapped area, and the sound pressure level in the outlet area is greater than that in the inlet area. The oil replenishment groove may considerably minimize cavitation noise, enhance the oil absorption capacity, and reduce the outer field’s overall sound pressure level by 4–5 dB.
Keywords: external gear pumps; flow-induced noise; the oil replenishment groove; flow pulsation rate.
Full Text: PDF
Copyright © 2023 The Author(s). This work is licensed under the Creative Commons Attribution 4.0 International CC BY 4.0.


Carletti E., Miccoli G., Pedrielli F. (2016), Vibroacoustic measurements and simulations applied to external gear pumps. An integrated simplified approach, Archives of Acoustics, 41(2): 285–296, doi: 10.1515/aoa-2016-0028.

Chen Q.G., Xu Z., Zhang Y.J. (2003), Application of RNG K-ε model in numerical calculation of engineering turbulence [in Chinese], Chinese Quarterly Journal of Mechanics, 24(1): 88–95.

Fiebig W., Wróbel J. (2022), Experimental and numerical investigation on the noise development in fluid power units: An overview, Archives of Civil and Mechanical Engineering, 22(4): 1–18, doi: 10.1007/S43452-022-00481-X.

Guo S.X., Guan X.F. (2021), Simulation research on trapped oil pressure of involute internal gear pump, Mathematical Problems in Engineering, 2021: 8834547, doi: 10.1155/2021/8834547.

Huang P.L. et al. (2019), A study on noise reduction of gear pumps of wheel loaders based on the ICA model, International Journal of Environmental Research and Public Health, 16(6): 999, doi: 10.3390/ijerph16060999.

Liu Y.Y., Wang L.Q., Zhu Z.C. (2015), Numerical study on flow characteristics of rotor pumps including cavitation, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 229(14): 2626–2638, doi: 10.1177/0954406214562634.

Liu Y.Y., Wang L.Q., Zhu Z.C. (2016), Experimental and numerical studies on the effect of inlet pressure on cavitating flows in rotor pumps, Journal of Engineering Research, 4(2): 19, doi: 10.7603/s40632-016-0019-x.

Marinaro G., Frosina E., Senatore A. (2021), A numerical analysis of an innovative flow ripple reduction method for external gear pumps, Energies, 14(2): 471, doi: 10.3390/en14020471.

Paszkowski W. (2020), Modeling of vibroacoustic phenomena using the method of parameterizing the audio signal, Eksploatacja i Niezawodnosc – Maintenance and Reliability, 22(3): 501–507, doi: 10.17531/ein.2020.3.13.

Tang C., Wang Y.S., Gan J.H., Guo H. (2014), Fluid-sound coupling simulation and experimental validation for noise characteristics of a variable displacement external gear pump, Noise Control Engineering Journal, 62(3): 123–131, doi: 10.3397/1/376212.

Wang H., Deng G., Li Q., Kang Q. (2016a), Research on bispectrum analysis of secondary feature for vehicle exterior noise based on nonnegative Tucker3 decomposition, Eksploatacja i Niezawodność – Maintenance and Reliability, 18(2): 291–298, doi: 10.17531/ein.2016.2.18.

Wang C.X., Wu C.J., Chen L.J., Qiu C.L., Xiong J.S. (2016b), Review on mechanism and prediction of flow-induced noise [in Chinese], Research on Chinese Ships, 11(1): 57–71.

Woo S., Vacca A. (2020), Experimental characterization and evaluation of the vibroacoustic field of hydraulic pumps: The case of an external gear pump, Energies, 13(24): 6639, doi: 10.3390/EN13246639.

Woo S., Vacca A. (2022), An investigation of the vibration modes of an external gear pump through experiments and numerical modeling, Energies, 15(3): 796, doi: 10.3390/EN15030796.

Zhang D.S., Zhang N.S., Xu B., Zhao R.J., Gao X.F., Li N. (2021), Numerical simulation of the flow-induced noise in a water-jet pump based on the Lighthill acoustic analogy theory [in Chinese], Journal of Vibration and Shock, 40(10): 278–287.

Zhou Y.K., Li W.W., Yang D.P. (2018), Noise simulation analysis of a variable displacement external gear pump and unloading groove optimization, Open Access Library Journal, 5(11): 1–9, doi: 10.4236/oalib.1105030.

DOI: 10.24425/aoa.2023.146824