Abstract: On the bests of thermo- elasto- hydrodynamic equations for the lubrication system, the similitude criteria of hydraulic turbine bearing performances are obtained in this paper. The system considered includes rotor, water-cooled double tilting pads, oil tank , cooling system and so on.

Key words: 水轮发电机, 推力轴承, 相似性判据, 液体动力润滑