Numerical study on a compound hydraulic pulsation attenuator based on string-fluid resonance
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DOI 10.1007/s12206-020-0902-0
Journal of Mechanical Science and Technology 34 (10) 2020 Original Article DOI 10.1007/s12206-020-0902-0 Keywords: · Compound silencer · Hydraulic pulsation attenuator · String-fluid resonance · Simulation
Correspondence to: Hua Zhou [email protected]
Citation: Shang, X., Zhou, H., Yang, H. (2020). Numerical study on a compound hydraulic pulsation attenuator based on string-fluid resonance. Journal of Mechanical Science and Technology 34 (10) (2020) ?~?. http://doi.org/10.1007/s12206-020-0902-0
Received December 11th, 2019 Revised
Numerical study on a compound hydraulic pulsation attenuator based on string-fluid resonance Xia Shang, Hua Zhou and Huayong Yang State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
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.
June 21st, 2020
Accepted August 3rd, 2020 † Recommended by Editor No-cheol Park
1. Introduction Hydraulic systems are widely used in industrial fields as they can provide power for actuators to perform different tasks. Most hydraulic systems are driven by positive displacement pumps, which work periodically along with pulsation in hydraulic systems. However, due to lack of damping, even small flow pulsation could possibly cause strong vibration on the hydraulic pipelines and elements, leading to permanent damage and serious accidents. Thus, it is in urgent need of countermeasure to improve fundamental performance, reliability and safety of fluid power systems. Fluid pulsation can be damped using hydraulic pulsation attenuators (HPAs) at the pump source [1, 2] and the inlet of the load [3]. According to the principle of operation, HPAs can be classified into actively controlled type [4], and passive type [5, 6]. The former one relies on the interference of waves and is usually developed for high-performance systems. However, the composition and the control algorithm of actively controlled HPAs is complicated, and thus there are hardly any reliable and commercial devices that can be used for practical applications, especially when the price is unaffordable to most of customers. The passive HPAs are popular in hydraulic systems of airplanes [7], vessels, and industrial power equipment because of the advantages of structure simplicity and no n
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