TY - JOUR
T1 - Tribo-dynamic performance analysis of engine main bearings with provision for wear progression and dynamic misalignment
AU - Chen, Yang
AU - Zhang, Hao
AU - Li, Xin
AU - Shi, Zhanqun
AU - Gu, Fengshou
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant no. 52175085 , Grant no. 52275102 ), and the Natural Science Foundation of Hebei Province (Grant no. E2022202185 , Grant no. E2022202128 ).
Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/12/14
Y1 - 2024/12/14
N2 - The journal main bearings in internal combustion (IC) engines are susceptible to wear and journal misalignment, which causes more lubrication failure and frictional loss. This study proposes a novel tribo-dynamic model which is coupled with the dynamic misalignment and wear progression under the transient mixed lubrication regime, along with elastic deformation, surface roughness and cavitation boundary condition. The tribo-dynamic performance is evaluated by simultaneously solving translational and angular motion equations. Numerical simulation results reveal that the misalignment deflection angles decrease first and then increase with the increasing wear depth, and the wear angular displacement along with the rotational direction can restrain the misalignment degree and improve tribological lubrication properties. Therefore, the asperity contact possibilities can be reduced in the early stage of wear progression considering dynamic misalignment. In addition, the performance divergences between the static and dynamic misalignment are investigated considering different wear progression, surface roughness and load magnitudes, noting that the lubrication performance has a nonlinear relationship with dynamic misalignment, which generally intensifies the asperity contact and lubrication failure behaviors under most circumstances. The findings of the present work provide critical guidance for the lubrication failure analysis and condition monitoring of the engine main bearings.
AB - The journal main bearings in internal combustion (IC) engines are susceptible to wear and journal misalignment, which causes more lubrication failure and frictional loss. This study proposes a novel tribo-dynamic model which is coupled with the dynamic misalignment and wear progression under the transient mixed lubrication regime, along with elastic deformation, surface roughness and cavitation boundary condition. The tribo-dynamic performance is evaluated by simultaneously solving translational and angular motion equations. Numerical simulation results reveal that the misalignment deflection angles decrease first and then increase with the increasing wear depth, and the wear angular displacement along with the rotational direction can restrain the misalignment degree and improve tribological lubrication properties. Therefore, the asperity contact possibilities can be reduced in the early stage of wear progression considering dynamic misalignment. In addition, the performance divergences between the static and dynamic misalignment are investigated considering different wear progression, surface roughness and load magnitudes, noting that the lubrication performance has a nonlinear relationship with dynamic misalignment, which generally intensifies the asperity contact and lubrication failure behaviors under most circumstances. The findings of the present work provide critical guidance for the lubrication failure analysis and condition monitoring of the engine main bearings.
KW - Dynamic misalignment
KW - Engine main bearings
KW - Lubrication failure analysis
KW - Wear fault
UR - http://www.scopus.com/inward/record.url?scp=85211751712&partnerID=8YFLogxK
U2 - 10.1016/j.engfailanal.2024.109196
DO - 10.1016/j.engfailanal.2024.109196
M3 - Article
AN - SCOPUS:85211751712
VL - 169
JO - Engineering Failure Analysis
JF - Engineering Failure Analysis
SN - 1350-6307
M1 - 109196
ER -