Thermo-hydrodynamic analysis of dynamically loaded bearings

A numerical model on the thermo-hydrodynamic analysis of the dynamically loaded journal bearing was built in order to study the thermal effect on the lubricating performance. The simultaneous solution of the generalized Reynolds equation, energy equation, heat transfer equation and force equilibrium equation were involved, and the oil film pressure and temperature field, journal orbit, oil flow and power loss were obtained. Considering the difference of time scales for thermal transients in the oil film and bushing, the transient and quasi-steady methods were put forward. Furthermore, the different results were obtained by using different temperature boundary conditions. The results show that the oil film pressure, journal orbit, oil flow, and power loss vary considerably under the transient load and the different temperature boundary conditions have a strong influence on the results.