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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: Aiming at the cavitation phenomenon in the port pair of axial piston pump, a cavitation model of the piston pump distribution pair was established considering the surface topography of the valve plate, and the effects of pressure, rotational speed and the surface topography of the valve plate on the cavitation phenomenon in the valve plate were analyzed.Firstly, because the surface of machined parts has fractal characteristics, the surface morphology of port plate was simulated by fractal theory, and the cavitation model of port plate pair of axial piston pump was established. Then, the mathematical model was solved by finite difference method and relaxation iteration method, and the numerical solution meeting the accuracy requirements was obtained, so as to obtain the distribution characteristics of oil film pressure in the port plate pair. According to the distribution characteristics of oil film pressure in the port plate pair, the position where cavitation was easy to occur on the surface of the port plate was analyzed. Finally, by changing the pressure, speed and fractal parameters of the port plate pair, the effects of different pressure, cylinder speed and surface morphology on the cavitation phenomenon of the port plate pair were obtained. The results show that the surface of the port plate is prone to local cavitation in the transition area between high pressure and low pressure. When the pressure of the oil discharge chamber of the port plate pair reaches 30 MPa and the coarser the surface of the port plate, the local gas volume fraction of the port plate is about 92%. Therefore, the severity of cavitation on the port plate surface can be reduced by improving the surface machining accuracy and reducing the surface roughness.
Key words: positive displacement pump; port plate paircavitation model; surface roughness; pressure of oil discharge chamber; local gas volume fraction; cylinder speed; degree of cavitation; oil film lubrication performance
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- Chinese Core Periodicals
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- Chinese Sci-tech Core Periodicals
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- SA, INSPEC Indexed
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- CSA: T Indexed
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- UPD:Indexed
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2010 Zhejiang Information Institute of Mechinery Industry
Technical Support：Hangzhou Bory science and technology
