Thermohydrodynamic lubrication analysis of misaligned journal bearing considering the axial movement of journal.

In the journal-bearing system, the journal inevitably moves along the bearing axis, and the axial movement of journal may affect the performance of misaligned journal bearing. In this article, a numerical model for the thermohydrodynamic lubrication of bearing considering the axial movement of journal is established, and based on which a comprehensive analysis on the performance of misaligned journal bearing is conducted by solving the generalized Reynolds equation, heat conduction equation and energy equation. The results show that axial movement of misaligned journal has more obvious influence on the bearing lubrication characteristics at the lower speed, larger inclination angle and eccentricity. The impact of axial movement on the bearing lubrication performance is greatly affected by the thermal effect and surface roughness. • A numerical model of thermohydrodynamic lubrication considering the axial movement of misaligned journal which moves along the bearing axis is built. • When the axial movement of misaligned journal takes place, the bearing lubrication performance will change significantly. • The impact of axial movement on the bearing lubrication performance is greatly affected by the thermal effect and surface roughness. [ABSTRACT FROM AUTHOR]