Silencer for Hydraulic Piston Pump Pressure Pulsations

Strunk, Richard D.

doi:10.4271/911759

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…In open-loop hydraulic system, the ripple at the discharge port is emphatically concerned to lower. Typical examples are accumulator that bladder volume change absorbs ripple and shock of fluid, 21–23 flexible tube, 24 Herschel–Quincke tube with multiple parallel lines, 14,25 quarter-wavelength tube, 26–28 expansion chamber attenuator 17 and Helmholtz resonator consisting of throttles and cavities. 2,27,29,30 These attenuators are used as a stand-alone device or sometimes combined together to control fluid noise only for external lines without considering the characteristics of pump.…”

Section: Introductionmentioning

confidence: 99%

A novel hydraulic pulsation reduction component based on discharge and suction self-oscillation: Principle, design and experiment

Tang

Sun

Changbin

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part I:

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The reduction of fluid ripple in pipes is extremely important for the reliability and safety of aircrafts and ships. Currently, most researches only pay attention to the discharge port and ignore the suction port and the inherent characteristic of the axial pump between both ports, which may cause significant underestimation of fluid ripple especially in the closed-loop hydraulic system. Therefore, the aim of this study is to propose a novel passive fluid ripple attenuator, which can simultaneously reduce discharge and suction pulsation of the axial-piston pump, and adapt to the condition of frequent change of load reversing in closed hydraulic system. First, the phase matching rule is discovered between discharge and suction ripple, and then based on that, the proposed discharge and suction self-oscillation principle is verified through simulation on the phase relationship of the pump internal pistons, instead of considering the two separately as before. The attenuator designed with the concept of the discharge and suction self-oscillation principle is presented, and models of how ripple generates and the attenuator works are represented analytically. The corresponding simulation model is established, and the result indicates that the ripple of both ports of the piston pump is weakened significantly. Moreover, one testing platform is developed, and the experimental study is conducted on the discharge and suction ripple. It proves that the proposed attenuator based on discharge and suction self-oscillation principle can reduce the fluid ripple effectively.

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Section: Introductionmentioning

confidence: 99%

A novel hydraulic pulsation reduction component based on discharge and suction self-oscillation: Principle, design and experiment

Tang

Sun

Changbin

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part I:

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show abstract

“…Strunk has investigated the insertion loss for a specific type of side branch resonator, called a cross-loop attenuator, and has identified the design parameters which are critical to insertion loss for a piston pump. 8 Dodson et al have tested three types of quarter wavelength side-branch resonators (in-line, flexible side-branch, and rigid side-branch, respectively) in an industrial-scale hydraulic system. 9 All three types were found to obtain positive noise reduction characteristics with maximum IL from 10 to 20 dB at the pump's pistonpassage frequency.…”

Section: Introductionmentioning

confidence: 99%

Study on Acoustic Performance of a Water Muffler for Gear Pump

Du¹,

Chu²,

Cao³

et al. 2019

The International Journal of Acoustics and Vibration

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A water muffler is used for the noise control of a hydraulic pipeline with an external gear pump. An experimental system is established to investigate the acoustic performance of the water muffler, in which the gear pump is utilized as the sound source and power supply. Comparisons between the experimental results of the reference tube, rubber tube, and water mufflers with different inner structures have been made. Numerical simulations on the rubber tube and different water mufflers with various inner structures have been conducted. Simulation results have been compared with the experimental results. These comparison results show that the rubber tube with a compliant wall substantially contributes to the reduction of the noise generated by the gear pump, especially at the high frequency band and relatively low rotate speed of the gear pump. The water muffler results in the enhancement of the noise reduction effect on the rubber tube. With the speed of the gear pump increasing from 1172 r/min to 2344 r/min, the effect of the noise reduction becomes much weaker, since the flow-induced noise gets more intensified. For the rubber tube, in particular, the sound pressure level gets close to that of the reference tube at the speed of 2344 r/min. Moreover, it has been proven by another important experimental result that the length of the inner structure can play a critical role to the flow noise generation.

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“…But they can only get good attenuation characteristic at low frequency area. The reflection type of fluid pulsation attenuator includes Herschel-Quincke tube [7,8], Quarter-wavelength tube [9][10][11], expansion chamber attenuator [4] and Helmholtz resonator [10] [12][13][14]. Function principle of this type of fluid pulsation attenuator is the eliminating superposition of pressure waves by interference.…”

Section: Introductionmentioning

confidence: 99%

Development research of reflection-absorption compound type fluid pulsation attenuator

Changbin

Zhang

2012

IEEE 10th International Conference on Industrial Informatics

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Based on the disadvantages analysis of the existing fluid pulsation attenuator, two reflection-absorption compound type of fluid pulsation attenuators which are both composed of a chamber and a mass-spring-damping system are developed: in-line reflection-absorption compound type of fluid pulsation attenuators (in-line RAFPA) and side-branch reflectionabsorption compound type of fluid pulsation attenuators (sidebranch RAFPA). The transfer matrix models of the two attenuators are established as well as expansion chamber attenuator and Helmholtz resonator. Based on the transfer matrix model, the transmission loss of the four attenuators is given out to evaluate their attenuation characteristic. The attenuation characteristic comparisons of in-line RAFPA with expansion chamber attenuator and side-branch RAFPA with Helmholtz resonator are carried out respectively. And the effect of the mass-spring-damping system to in-line RAFPA and side-branch RAFPA is investigated. The simulation reveals the two reflection-absorption compound type of fluid pulsation attenuators have better attenuation characteristic and are more compact than expansion chamber attenuator and Helmholtz resonator.

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Silencer for Hydraulic Piston Pump Pressure Pulsations

Cited by 8 publications

References 5 publications

A novel hydraulic pulsation reduction component based on discharge and suction self-oscillation: Principle, design and experiment

A novel hydraulic pulsation reduction component based on discharge and suction self-oscillation: Principle, design and experiment

Study on Acoustic Performance of a Water Muffler for Gear Pump

Development research of reflection-absorption compound type fluid pulsation attenuator

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