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

2018 6th International Conference on Mechanical Engineering, Materials Science and Civil Engineering

材料科学;机械制造;土木建筑工程

Qi, Bo^1 ; Zhang, Yong^1 ; Meng, Guoyou^1 ; Ding, Yao^1 ; Ye, Ming^2

School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road No 381, Tianhe District, Guangzhou

510641, China^1

Guangzhou Huagong Motor Vehicle Inspection Technology Co. LTD, Wushan Road No 381, Tianhe District, Guangzhou

510641, China^2

关键词: Film characteristics;    High pressure common rail;    Hydrodynamic lubrication;    Piston cylinders;    Radial piston pump;    Research results;    Theoretical study;    Working pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/542/1/012018/pdf
DOI  :  10.1088/1757-899X/542/1/012018

来源: IOP

【 摘 要 】

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.