Abstract
Time-varying pressure produced in a cylinder chamber of an axial hydraulic pump is closely associated with various crucial issues such as system noise emission, swash-plate control, lubrication in sliding parts and etc. In this paper a computational study was performed to investigate the dynamic behavior of the cylinder pressure considering a general system of a piston pump, a hydraulic line, and an end resistance. Combined lumped and distributed parameter model was used, and led to successful fitting with existing experimental data obtained from a pump/line/resistance system which included a pressure relief valve in series. Using the developed tool, the effects of several dimension and operation parameters were investigated assuming that the end resistance was a simple orifice valve. The calculation results, depicted in both time domain and frequency domain, showed that the harmonics of the dynamic pressure and their amplitudes varied with line size capriciously. It was also shown that the harmonic of maximum pulsation amplitude changed in a periodic way as rotating frequency increased. Lastly, the pulsation amplitudes increased with the increase of discharge pressure proportionally with no change of the harmonics.
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Recommended by Associate Editor Hyoung-gwon Choi
Jung-Hun Shin received B.E., M.E. and D.E. degrees at Korea Advanced Institute of Science and Technology in 1999, 2002, and 2013, respectively. His interest has been robust and reliable design in various machines such as precision or mechatronic ones. He also had industrial career in product qualification, and so concentrates his attention on the design for product quality and reliability. Recently he is devoting himself to the safety assessment of medical device products.
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Shin, JH. Computational study on dynamic pressure in a swash-plate axial piston pump connected to a hydraulic line with an end resistance. J Mech Sci Technol 29, 2381–2390 (2015). https://doi.org/10.1007/s12206-015-0531-1
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DOI: https://doi.org/10.1007/s12206-015-0531-1