Theoretical study of flow ripple for an aviation axial-piston pump with damping holes in the valve plate

Changbin, Guan; Zhang, Jiao; He, Shouzhan

doi:10.1016/j.cja.2013.07.044

Cited by 47 publications

(36 citation statements)

References 13 publications

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“…Traditionally, Poiseulle equation and Couette equation are used to evaluate the leakage via piston/ cylinder interface (Ivantysyn and Ivantysynova, 2001;Ma et al, 2010b;Guan et al, 2014). A more precise way is via using the 2D Reynolds equation of lubrication (Xu et al, 2013;Mizell and Ivantysynova, 2014;Wegner et al, 2014;Lin and Hu, 2015).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Zhang

et al. 2016

JZUS-A

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Abstract:A good efficiency performance of a pump over a wide range of displacement conditions is crucially important for variable pump control systems to save energy. However, according to the literature, less attention has been paid to the understanding of the efficiency, leakage flow, and compression flow characteristics of the pump with respect to displacement conditions. In this study, a test bench was built, and a novel explicit volumetric loss model was proposed to investigate these problems. The overall efficiency is found to drop considerably with the decreasing displacement. The volumetric losses range from 13% to 47% of the total power losses of pump at the rated speed, under the conditions of pressure ranging from 5 to 35 MPa and displacement ranging from 13% to 100% of full displacement. The highest proportion of compression flow losses in the total volumetric losses of pump at the rated speed can reach up to 41% when the pressure and displacement are greater than 30 MPa and 88% of full displacement, respectively; after that, the proportion gradually decreases with decreasing displacement. However, the leakage flow generally increases with decreasing displacement, or may decrease first and begin to increase after the minimum with the further decrease of displacement. In the components of leakage of slipper/swash plate pair, the squeeze leakage is found to reach a magnitude equal to that of the Poiseuille leakage. The findings can guide the further research and design of pumps with better efficiency performance.

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Section: Introductionmentioning

confidence: 99%

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Zhang

et al. 2016

JZUS-A

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“…In 2014 Guan Changbin et al [18] have proposed the singlepiston model exhaustively deliberates fluid compressibility, opening confinement impact, and fluid resistance in the capillary tube, and the spillage stream. In view of the single-piston model, a multi-piston pump model has been secured as per the direct hydraulic driven circuit.…”

Section: Literature Reviewmentioning

confidence: 99%

Fluid flow modeling and experimental investigation on automobile damper

Jugulkar

Singh

Sawant

2016

Construction and Building Materials

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“…1 The hydraulic system is the means of transmission and energy control on a plane or a missile. It is often used for the undercarriage, the steering engine, the fuel system, and the test bed on an aircraft.…”

Section: Introductionmentioning

confidence: 99%

Power characteristics of a variable hydraulic transformer

Yang

Jiang

2015

Chinese Journal of Aeronautics

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The flow control of hydraulic transformers is a great challenge. To meet this challenge, a new kind of hydraulic transformer, variable hydraulic transformer (VHT), is proposed in this work. This paper focuses on the power characteristics of the newly proposed VHT, including instantaneous power, average power, power pulsation, and efficiency. In the analyses, the concepts of efficiency, input power, output power, starting angle, and ceasing angle are defined or redefined. To investigate the power characteristics, their models are derived by considering the governing factors such as the control angle of the swash plate and the structure of the port plate. This work highlights that the load flow can be adjusted by adjusting the control angle of the swash plate, and the power characteristics at the B-port produce a remarkable change. In addition, the VHT has a starting angle and a ceasing angle, and these two angles can be adjusted by the influencing factors. The results reveal that the power pulsation and the jump points of the instantaneous power are the primary causes of a less smooth work. Then, it is shown that the control angle of the port plate, the control angle of the swash plate, and the pressures at the ports are the three key elements for a stable operation. The results also reveal that the adjustment of the influencing factors can improve the efficiency.

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Theoretical study of flow ripple for an aviation axial-piston pump with damping holes in the valve plate

Cited by 47 publications

References 13 publications

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Fluid flow modeling and experimental investigation on automobile damper

Power characteristics of a variable hydraulic transformer

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