Abstract:A fluid dynamic pressure lubricating model of floating ring bearing considering thermal effects was established.The Reynolds equation was solved by the numerical difference method,and the side leakage of the floating ring bearing was solved.The simulation results was compared with the experimental data,the correctness of the model established was verified.The effects of the supply temperature on the static lubricating characteristic parameters,such as friction power loss,temperature rise,speed of ring,side leakage,were investigated with the influences of floating ring heating expansion deformation being taken into account.The results show that increasing supply temperature can increase the rotational speed of the floating ring significantly,increase the amount of oil supply to the inner oil film,reduce the friction power loss of the inner and outer oil films,and reduce the temperature of side leakage.The temperature of side leakage is increased with the increasing of the journal speed,and the variation of the temperature rise of side leakage with the the journal speed is more intense when supplying the lower temperature lubricating oil.