Lubricating simulation analysis of connecting rod bearing based on AVL-EXCITE

ZHU Xiao-ping， LIU Zhen-tao， ZHANG Peng-wei， LIU Hong-rui， YE Xiao
（The Department of Energy Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： The lubrication state of the connecting rod bearing has tremendous influence to the engine useful life. While strengthening constantly with engine，the performance requirements of the connecting rod bearing has a corresponding increase. Therefore，the in-depth study on the lubrication problem of the connecting rod bearing for a more accurate analysis and design of bearing performance will become increasingly important. Firstly，the theoretical effect of the lubrication conditions on the reliability of the bearing was described. Then the dynamics analytical model of the connecting rod flexible multi-body of a diesel considering hydrodynamic lubrication was established by AVL-EXCITE． The parameters were calculated，including journal center locus，the minimum oil film thickness，the peak oil film pressure and so on. The effects of different factors such as rotating speed，bearing clearance and temperature were also analyzed．The results indicate that the research is important to the estimation of the reliability of the bearings，the coupling dynamic analysis and the optimization design of the connecting rod bearing.
Key words： connecting rod bearing； lubrication simulation； minimum oil film thickness