Effect of axial piston pin motion on tribo-dynamics of piston skirt-cylinder liner system

Meng, Fanzhi; Du, Minggang; Wang, Xianfu; Chen, Yuanpei; Zhang, Qing

doi:10.1108/ilt-09-2016-0229

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…The force analysis is carried out on the piston 36 (as shown in Figure 1), it is matting for the finite element analysis of piston later. All forces of piston transform relevance to the crankshaft angle.…”

Section: Standard Piston Finite Element Analysismentioning

confidence: 99%

Study on lubrication performance of engine piston skirt with bionic design

Bo,

Song,

Weijun

et al. 2023

Advances in Mechanical Engineering

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As the main friction pair of engine, the friction loss of piston-cylinder liner assembly in the working process has become the main reason of engine friction power consumption. Many species in the biological world have formed non-smooth forms of resistance reduction after thousands of years of survival and evolution. Many people have applied this non-smooth shape of drag reduction on organisms to the surface of friction pairs in construction machinery. Based on LX108 engine, the wear and erosion resistance of Scapharca subcrenata surface is applied to the piston skirt, which is the main friction pair in the engine. Nine test schemes were designed according to orthogonal test. This design selects three factors, namely, groove distribution type, groove depth and width, groove spacing, and each factor includes three levels. The macroscopic fluid lubrication state of the whole piston skirt with bionic shape is studied. Through the change of oil film thickness caused by thermal-mechanical coupling deformation of skirt, combined with the average Reynolds equation, the hydrodynamic pressure of lubricating oil, shear stress, and skirt friction force are obtained to verify the contribution of bionic shape to piston drag reduction, wear reduction, wetting increase, and friction power consumption. The simulation and test results show that the lubrication of all parts of the bionic groove piston skirt is better than that of the standard piston; When the depth and width of groove is 0.8 mm and the spacing is 10°, the thicker the oil film thickness of skirt is; The bionic piston whose oil film bearing area is 74%–87% of the standard piston has the smallest normal pressure and friction; When the upper end of the skirt is arranged with groove shape and the lower end is arranged with narrow groove shape between wide grooves, the lubrication effect is better.

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Section: Standard Piston Finite Element Analysismentioning

confidence: 99%

Study on lubrication performance of engine piston skirt with bionic design

Bo,

Song,

Weijun

et al. 2023

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Zhao et al 15 and Fang et al 16 built a more-comprehensive coupling model of PS–CL lubrication and crank–rod–piston multibody dynamics. Meng et al 17 showed how the axial piston-pin motion influences the lubrication performance under different operating conditions. However, the non-lubricated area and the chamfer area at the top of PS are ignored.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermal effect in piston skirt lubrication considering thermal deformation of piston and cylinder liner

Wang

et al. 2023

International Journal of Engine Research

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With the development of high-strength marine diesel engines, piston skirt lubrication plays an increasingly important role. In this study, to ensure that the mixed lubrication can be applied, the contact of the PS corner and CL is simplified to a spring–damper system. A coupled dynamical–tribological numerical model of a piston skirt is proposed by combining mixed lubrication and the secondary motion of the piston. The model is then used to study how the thermal effect of the piston skirt-cylinder liner friction pair affects (i) the secondary motion of the piston, (ii) the contact force of the piston-skirt corner points, and (iii) the lubrication characteristics, while considering ring friction, friction moment of piston pin and three-dimensional thermal deformation of the piston and cylinder liner. The results show that the secondary motion under the thermal condition is less than that under the cold condition, and the reverse rotation of the piston under the thermal condition occurs earlier. Asperity contact and corner points contact appear under the thermal condition, and the friction mean effective pressure under the cold condition is 47.7% greater than that under the thermal condition. Overall, it is necessary to consider the thermal effect of the piston skirt-cylinder liner friction pair.

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Cylinder liner deformation characteristics based on fourier transform and impact on ring pack sealing and friction power

Liu

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

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Effect of axial piston pin motion on tribo-dynamics of piston skirt-cylinder liner system

Cited by 7 publications

References 22 publications

Study on lubrication performance of engine piston skirt with bionic design

Study on lubrication performance of engine piston skirt with bionic design

Influence of thermal effect in piston skirt lubrication considering thermal deformation of piston and cylinder liner

Cylinder liner deformation characteristics based on fourier transform and impact on ring pack sealing and friction power

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