叠片式气体箔片推力轴承热特性分析

叠片式气体箔片推力轴承具有制造工艺简单、散热能力强等优点，针对该新型轴承提出了相应的热特性分析模型，通过数值仿真分析得到轴承气膜及各元件的温度，并对关键影响参数进行了重点分析. 研究结果表明:由于气膜在半径较大位置处的线速度大，其剪切产热效果明显，温度越高，气膜的高温区分布在靠近周向末端和顶箔侧；气膜、顶箔和推力盘温度均会随推力盘转速和轴承载荷的增大而升高；向箔片结构中通入冷却气流可以获得良好的降温效果，轴承温度随着箔片内通入冷却气流量的增大，先迅速下降后趋于平缓. 

A Thermohydrodynamic Analysis of Laminated Gas Foil Thrust Bearing

Laminated gas foil thrust bearing has the advantages of simple manufacturing process and strong heat dissipation capability and a thermohydrodynamic model is proposed for this gas foil thrust bearing in this study. The temperature of the film and each component were obtained through numerical simulation analysis, and the key parameters were analyzed. The research shows that the higher the velocity of the film at the larger radius, the more obvious the energy dissipation and the higher the temperature. The high temperature region of the film was distributed near the circumferential end and the top foil. The temperature of the film, top foil and thrust plate increased with a rise in the speed of the thrust disk and the bearing load. The temperature of the bearing first droped rapidly and then tended to be stable with the increase of the cooling airflow inside the foil, and the cooling effect of the airflow was obvious.