Abstract: Aiming at the selection difficult of marine transmission device caused by various load requirements, a comparative performance analysis of cylindrical bearing, elliptical bearing and tilting pad within marine speed and load range was carried out. Based on the geometric relationship of multiple types of journal bearings, considering the turbulent flow and temperature viscosity effect, the thermohydrodynamic lubrication model was established. The Reynolds equation, energy equation and temperature viscosity equation were solved by using the finite difference method. The dynamic and static performance of multiple types of journal bearings were compared and analyzed. Finally, the comparative tests of multiple types of journal bearings were carried out under the same specific pressure and different speed. The results show that cylindrical bearings have higher loading capacity than the other two types of bearings, and its power loss and oil flowrate are smaller than others, but the maximum oil film temperature of cylindrical bearing is higher than that of other types of bearing at each speed. The higher the rotating speed is, the greater the difference of the maximum temperature between cylindrical bearing and other types is，until it is up to 19 ℃. The dynamic performance of tilting pad bearing is better than other types of bearings. The experimental oil film temperature is in good agreement with the theoretical calculation.

Key words: multiple types of journal bearings; dynamic and static performances; performance comparison; temperature test