Profile Design and Seizure Analysis of Piston Pin Bearing of a Diesel Engine

doi:10.3969/j.issn.1000-1093.2018.10.003

Abstract

Abstract: For the seizure failure of piston pin bearing in the preliminary structural design, the heat transfer of piston is simulated and its temperature field is calibrated, and the thermo-mechanical deformation of piston at state is analyzed. The analytic results show that the non-compatible deformation of piston pin bearing is main reason leading to wear. Accordingly, the profile matching of piston pin boss bearing under thermo-mechanical condition is presented. On this basis, the profile of piston pin boss bearing is optimized, and the optimized profile is validated by simulation and engine test. The barrel-shaped, exponential and hyperelliptic profiles of the connecting rod small end bearing are compared to investigate the influences of those profiles on the load distribution of the bush. Results show that exponential and hyperelliptic profiles are more suitable for improving the load distribution of the connecting rod small end bearing.Key

Key words: dieselengine, pistonpinbearing, wearanalysis, profiledesign

CLC Number:

TK422

ZHANG Li-min, WANG Gen-quan, WANG Yan-rong, ZHAO Zhi-qiang, ZHANG Zhong-wei, SONG Xian-hao. Profile Design and Seizure Analysis of Piston Pin Bearing of a Diesel Engine[J]. Acta Armamentarii, 2018, 39(10): 1892-1900.

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第39卷
第10期2018 年10月兵工学报ACTA
ARMAMENTARIIVol.39No.10Oct.2018

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