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Numerical study on a compound hydraulic pulsation attenuator based on string-fluid resonance

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Abstract

In designing a hydraulic pulsation attenuator (HPA), the size and effective frequency band are two factors needing to be compromised. To improve the performance of HPA under a given volume, this paper proposes a compound HPA (CHPA), which works by string-fluid resonance and attenuation of the expansion chamber. The numerical model of the CHPA is derived using the method of electric-hydraulic analogy and evaluated by simulation and experiments. The experiment results show that the average relative error of the frequency position is within 5 Hz. Finally, a numerical comparison study is demonstrated, indicating that the attenuation strength of the CHPA at given periodic pulsation frequency is higher than ECA, SBHR, STPA and BCA by 82.3 %, 71.2 %, 257.1 % and 65.1 %, respectively.

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Abbreviations

P1 ∼ P4 :

Pressure at frequency domain

Q1 ∼ Q4 :

Flow at frequency domain

p1 ∼ p4 :

Pressure at time domain

q1 ∼ q4 :

Flow at time domain

Z string :

Impedance of the string array

HIL,HTL :

Insertion and transmission loss

H PR :

Pressure ratio

\({Q_{2g}}\) :

Flow rate of the g-th string

R ECA :

Equivalent resistance of the ECA

L ECA :

Equivalent inductance of the ECA

C ECA :

Equivalent capacitance of the ECA

ρ s :

Density of the oil

Ke,µ0 :

Bulk modulus and kinetic viscosity of the oil

µ, l :

Density and length of the string

D,V :

Diameter and volume of the chamber

f i n :

n-th order response frequency of the i-th string

Cin,Lin :

Equivalent capacitance and inductance of the n-th order of the i-th string

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Acknowledgments

Grateful acknowledgment is given to the financial supports from National Natural Science Foundation of China (No. 51521064, 51890880 and 51890885), and the National Key Research and Development Project under grant 2018YFB 2001203.

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Authors and Affiliations

  1. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, 310027, China

    Xia Shang, Hua Zhou & Huayong Yang

Authors
  1. Xia Shang
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  2. Hua Zhou
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  3. Huayong Yang
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Corresponding author

Correspondence to Hua Zhou.

Additional information

Xia Shang received the B.Eng. in Mechanical Engineering from Yanshan University, Qinhuangdao, China, in 2011. She is currently working toward the Ph.D. in the Department of Mechanical Engineering, Zhejiang University, Hangzhou, China. Her current research interests include hydraulic pulsation attenuation and the hydraulic system design.

Hua Zhou received the B.Eng., M.Eng., and Ph.D. in Mechanical Engineering from Huazhong University of Science and Technology, Wuhan, China, in 1990, 1993 and 1998, respectively. He is currently a Professor in the Department of Mechanical Engineering, Zhejiang University, China. His current research interests include hydraulic components, system control, and mechatronics.

Huayong Yang received his B.Eng. from Huazhong University of Science and Technology in 1982 and Ph.D. from University of Bath in 1988. He is now the Head of the School of Mechanical Engineering of Zhejiang University and the Director of the State Key Laboratory of Fluid Power and Mechatronic Systems. His research interests are in motion control and energy saving of mechatronic systems, development of fluid power component and system, integration of electro-hydraulic system and engineering applications, 3D bioprinting machine and biofabrication applications.

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Shang, X., Zhou, H. & Yang, H. Numerical study on a compound hydraulic pulsation attenuator based on string-fluid resonance. J Mech Sci Technol 34, 4091–4106 (2020). https://doi.org/10.1007/s12206-020-0902-0

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  • DOI: https://doi.org/10.1007/s12206-020-0902-0

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