Abstract:Aimed at the problem of heating effect of the conical hydrostatic bearing, the mechanism of the heat generation and transfer was analyzed. The thermal character of conical hydrostatic bearing was indicated to be a coupled thermal problem, the heat produce and heat transfer conditions of oil, bearing, shaft and other parts must be considered as a whole system.A coupled heat transfer model of the bearing system was built by ANSYS CFX software,with which the bearing temperature field distribution and the heat transfer status was solved.An experimental platform was built to verify the model. Results show that the temperature of the bearing is quite different at different parts when it is in thermal equilibrium. The temperature rising of the bearing is increased along with the increasing of rotational speed and the decreasing of inlet pressure. The simulation results are identical to the experiment results, which proves that using the coupled thermal model to analyze the thermal state of conical hydrostatic bearing is quite accurate.