计入三维热效应对可倾瓦推力轴承动力特性的影响

在考虑三维热效应的情况下，研究线支撑可倾瓦推力轴承的动力特性.建立广义雷诺方程、完整的三维能量方程、瓦体的热传导方程和温粘关系，联立求解非线性偏微分方程组，计算油膜的刚度和阻尼系数.研究表明：温度变化对可倾瓦推力轴承的动力特性有较大影响；与不计入热效应的线支撑可倾瓦推力轴承相比，计入三维热流体的可倾瓦推力轴承的油膜刚度和阻尼系数会增大，其理论计算结果更接近实际工况；随着载荷、入口温度的增加以及转速的减小，油膜的刚度和阻尼也会随之增大.

Influence of Considering 3D Thermal Effects on Dynamic Characteristics of Tilting Pad Thrust Bearing

The dynamic characteristics of the line-supported tilting pad thrust bearing are studied by taking thermal effects into account. The generalized Reynolds equation, the complete 3D energy equation, the heat conduction equation of the pad, and the temperature viscosity relation are established to derive the stiffness and damping coefficient of the oil film on the tilting pad. It is shown that the thermal effects have significant influence on the dynamic characteristics of tilting thrust pads. Compared to the line-supported tilting pad without including the thermal effect, stiffness and damping coefficient of the oil film including the thermal effect increases so that it becomes closer to the actual operating conditions. With the increase of load and inlet temperature and the decrease of angular velocity, stiffness and the damping coefficient of the oil film will increase.