The approach on reducing the pressure pulsation and vibration of seawater piston pump through integrating a group of accumulators

Zhang, Zuti; Cao, Shuqian; Wang, Huawei; Luo, Xiaohui; Di, Jia; Zhu, Yuquan

doi:10.1016/j.oceaneng.2018.12.078

Cited by 29 publications

(9 citation statements)

References 20 publications

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“…Passive attenuators are the mostly widely used devices to achieve the fluid pulsation suppression in hydraulics system [39]. Zuti et al [40] integrated a group of accumulators into a seawater hydraulic piston pump and optimized the precharge pressure to reduce the pressure pulsation and vibration. Chen et al [41] contributed an integral sliding mode control strategy to stabilize the pressure of hydrodynamic system with accumulator.…”

Section: Introductionmentioning

confidence: 99%

Research on the Vibration Characteristic of a Seawater Hydraulic Piston Pump System and Vibration Reduction Approach

et al. 2021

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Seawater hydraulic piston pump has been widely used in ocean engineering and become a key power component for underwater equipment due to its inherent characteristic such as energy conservation and environment friendly. As one of the most important properties of seawater hydraulic piston pump, vibration would further determine the stability, reliability and stealth of underwater equipment. In this paper, the dynamic of a novel crankshaft seawater piston pump with gearbox are analyzed theoretically, illustrating the dramatically effect of the gearbox on the vibration characteristic of the seawater hydraulic piston pump. Then, a new type crankshaft seawater hydraulic piston pump system driven by a permanent magnet synchronous motor instead of asynchronies motor is proposed in order to eliminate the gearbox and improve the vibration characteristics. In addition, the vibration characteristic of this new type crankshaft seawater hydraulic piston pump system driven by asynchronous motor and permanent magnet synchronous motor are studied and compared experimentally. The experiment results indicate that the seawater hydraulic piston pump system driven by permanent magnet synchronous motor eliminating the gearbox has lower vibration acceleration level in comparison with the pump system driven by asynchronous motor and gearbox. The vibration acceleration level can be reduced from 7dB to 4.3dB. Driving the seawater hydraulic piston pump by permanent magnet synchronous motor instead of asynchronous motor is of benefit to eliminating the gearbox and reducing the vibration excitation source. Consequently, the vibration characteristic of the seawater hydraulic piston pump system driven by a permanent magnet synchronous motor is significantly improved.

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Section: Introductionmentioning

confidence: 99%

Research on the Vibration Characteristic of a Seawater Hydraulic Piston Pump System and Vibration Reduction Approach

et al. 2021

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“…Besides applications like energy storage or temperature compensation, hydraulic accumulators are used as potential energy storage in oscillating systems e.g. in hydro-pneumatic suspensions [1] and for pulsation damping [2] c.f. Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Effects of Unsteady Heat Transfer on Behaviour of Commercial Hydro-Pneumatic Accumulators

Hartig,

Depp,

Rexer

et al. 2020

Preprint

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Hydraulic accumulators play a central role as energy storage in nearly all fluid power systems. The accumulators serve as pulsation dampers or energy storage devices in hydro-pneumatic suspensions. The energy carrying gas is compressed and decompressed, often periodically. Heat transfer to the outside significantly determines the transfer behaviour of the accumulator since heat transfer changes the thermodynamic state of the enclosed gas. The accumulators operating mode ranges from isothermal to adiabatic. Simulating fluid power systems adequately requires knowledge of the transfer behaviour of the accumulators and therefore of the heat transfer. The Engineer's approach to model heat transfer in technical system is Newton's law. However, research shows, that in harmonically oscillating gas volumes, heat flux and bulk temperature difference change their phase. Newton's law is incapable of representing this physical phenomenon. We performed measurements on two sizes of commercial membrane accumulators.Experimental data confirm the failure of Newton's approach. Instead the heat transfer can be modelled with an additional rate dependent term and independently of the accumulator's size. Correlation equations for the heat transfer and the correct accumulator transfer behaviour are given.

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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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The approach on reducing the pressure pulsation and vibration of seawater piston pump through integrating a group of accumulators

Cited by 29 publications

References 20 publications

Research on the Vibration Characteristic of a Seawater Hydraulic Piston Pump System and Vibration Reduction Approach

Research on the Vibration Characteristic of a Seawater Hydraulic Piston Pump System and Vibration Reduction Approach

Effects of Unsteady Heat Transfer on Behaviour of Commercial Hydro-Pneumatic Accumulators

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

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