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

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Guan, Changbin ; Jiao, Zongxia ; He, Shouzhan (2014)
  • Publisher: Elsevier BV
  • Journal: Chinese Journal of Aeronautics, volume 27, issue 1, pages 169-181 (issn: 1000-9361)
  • Related identifiers: doi: 10.1016/j.cja.2013.07.044
  • Subject: TL1-4050 | Mechanical Engineering | Axial-piston pump | Simulation | Mathematical models | Flow ripple | Swash plate | Motor vehicles. Aeronautics. Astronautics | Aerospace Engineering | Damping hole

Based on the structure of a certain type of aviation axial-piston pump’s valve plate which adopts a pre-pressurization fluid path (consisting a damping hole, a buffer chamber, and an orifice) to reduce flow ripple, a single-piston model of the aviation axial-piston pump is presented. This single-piston model comprehensively considers fluid compressibility, orifice restriction effect, fluid resistance in the capillary tube, and the leakage flow. Besides, the instantaneous discharge areas used in the single-piston model have been calculated in detail. Based on the single-piston model, a multi-piston pump model has been established according to the simple hydraulic circuit. The single- and multi-piston pump models have been realized by the S-function in Matlab/Simulink. The developed multi-piston pump model has been validated by being compared with the numerical result by computational fluid dynamic (CFD). The effects of the pre-pressurization fluid path on the flow ripple and the instantaneous pressure in the piston chamber have been studied and optimized design recommendations for the aviation axial-piston pump have been given out.
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