期刊
CHINESE JOURNAL OF AERONAUTICS
卷 27, 期 1, 页码 169-181出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2013.07.044
关键词
Axial-piston pump; Damping hole; Flow ripple; Mathematical models; Simulation; Swash plate
资金
- National Natural Science Foundation of China [51235002]
- National Science Foundation for Distinguished Young Scholars [50825502]
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. (C) 2014 Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.
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