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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: The piston cavity of the axial piston pump will produce flow distribution impact in the process of high-pressure and low-pressure conversion in the oil suction and discharge area, resulting in vibration and noise of the piston pump.To reduce the distribution impact of a swash plate axial piston pump, the mathematical model and AMESim simulation model of the change of the oil pressure in the piston cavity considering the leakage of the friction pair were established to study the influence of different distribution structures on the distribution impact of the piston pump. Firstly, the mathematical model of flow distribution impact was established based on the piston pump's working principle and kinematic analysis. Then, based on the established mathematical model, Python software was used to analyze the influence of oil compressibility and size of indexing valve plate angle, transition angle, and vibration-damping holeon the pressure fluctuation of the piston chamber, and an optimization scheme for the piston pump was proposed. Finally, based on the AMESim simulation model, the optimization scheme obtained by theoretical calculation was simulated and verified. The results show that by adjusting the transition angle of the valve plate and the size of the damping hole, the impact phenomenon can be effectively reduced, and the flow pulsation rate of the piston pump under the rated condition is reduced from 35.59% to 20.23%, which is reduced by 15.56%. The research provides a reference for the design and optimization ofaxial piston pumps.
Key words: vibration of plunger pump; distribution pair/structure;distribution impact; oil pressure; friction pair leakage; transition angle; vibrationdampening hole structure
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