Study on Film Characteristics of Piston-Cylinder Interface of High-Pressure Common Rail Radial Piston Pump with Micro Motion

When the high-pressure common rail radial piston pump works, the piston is subjected to film pressure and cam driving force, resulting in some micro-motion such as offset and inclination. A large number of theoretical studies have shown that the micro-motion of piston has an important effect on the...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-06, Vol.542 (1), p.12018
Main Authors: Qi, Bo, Zhang, Yong, Meng, Guoyou, Ding, Yao, Ye, Ming
Format: Article
Language:English
Subjects:
Common rail
Cylinders
Film thickness
Lubricants
Lubricants & lubrication
Optimization
Reynolds equation
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Summary:When the high-pressure common rail radial piston pump works, the piston is subjected to film pressure and cam driving force, resulting in some micro-motion such as offset and inclination. A large number of theoretical studies have shown that the micro-motion of piston has an important effect on the film characteristics of piston-cylinder interface. In this paper, according to the theory of hydrodynamic lubrication, Reynolds equation and film thickness equation of piston micro-motion are established, and solve the problem of the lubricant film of the piston-cylinder interface under different working conditions. The results show that the working pressure and cam speed have great influence on the film characteristics of piston-cylinder interface with micro-motion. The research results provide theoretical support for the optimization of the film parameters of the piston-cylinder interface.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/542/1/012018