径向小孔节流静压轴承的静动特性分析

Analysis of Static and Dynamic Characteristics of Radial Hole Throttling Hydrostatic Bearing

摘要: 针对转速对静压气体轴承的影响不可忽略，提出了对径向小孔节流气体静压轴承的静动态性能分析。通过求解非定常雷诺方程，建立线性扰动理论和迭代过程。数值计算了轴承在不同转速，气膜厚度以及供气压力工况下的承载性，动刚度和动阻尼。结果表明，轴颈旋转对轴承静动态性能有重要影响，小孔节流静压径向轴承的垂向主刚度和主阻尼对扰动转速有很大的依赖性。

Abstract: The influence of rotation speed on aerostatic bearing can not be ignored. The static and dynamic performance analysis of radial hole aerostatic bearing is put forward. The linear perturbation theory and iterative process for solving the unsteady Reynolds equation are established. The bearing capacity, dynamic stiffness and dynamic damping of the bearing under different speeds, gas film thickness and gas supply pressure are numerically calculated. The results show that the journal rotation has an important influence on the static and dynamic performance of bearings. The vertical stiffness and main damping of the pinhole throttling hydrostatic bearing are very dependent on the disturbance speed.