摘要
采用有限差分法求解三可倾瓦径向气体轴承静态气体润滑方程,得到了稳态时轴瓦与转子表面间的气膜压力分布;在一定静载荷下,计算了不同轴承间隙对应的转子起飞转速及相同工作转速下的最高气膜压力;分析了不同轴承间隙时,转速从起飞转速上升至工作转速过程中转子偏心率和瓦块摆角的变化。结果表明:在一定静载荷下,轴承间隙越大,轴承的最高气膜压力越小,转子的起飞转速越高,偏心率及各瓦块的摆动幅度越大。
The static gas-lubricated Reynolds equation of a three-tilting-pads journal bearing was solved with the finite difference method to obtain the gas film pressure distribution of the bearing. Considering bearing carrying a constant load,the maximum gas-film pressure when the velocity of rotor is fixed and the lift-off speeds of the rotor corresponding to different bearing clearances were calculated. The changes of eccentricity ratio and tilt angle of pads in the process of the velocity of rotor increasing from lift-off speed to the working speed were also analyzed. The results show that with the bearing clearance increasing,the lift-off speed,the eccentricity ratio and the tilt angle of pads are increased while the maximum gas-film pressure is decreased.
出处
《机械科学与技术》
CSCD
北大核心
2015年第3期366-369,共4页
Mechanical Science and Technology for Aerospace Engineering
关键词
可倾瓦轴承
轴承间隙
最高气膜压力
起飞转速
瓦块摆角
bearing clearance
finite difference method
journal bearings
lift-off speed
maximum gas-film pressure
pressure distribution
Reynolds equation
rotors
tilt angle of pad
tilting-pad bearing
