数控车床的液体动静压轴承油膜压力特性

以某高精度数控车床主轴部件为研究对象,研究建立动静压轴承油膜压力的理论模型和仿真分析模型的方法.首先将雷诺方程和油膜承载力方程转化为无量纲的形式,然后采用数值法求解得到轴承油膜的无量纲压力分布图和不同区域的压力值及分布规律.采用流体动力学软件求解轴承油膜仿真模型,获得轴承油膜压力分布,以及在不同供油压力和主轴转速情况下油膜压力变化规律,对进一步研究动静压轴承的承载能力和动静压轴承的设计提供重要的参考.将理论分析和仿真分析结果进行对比,验证了所采用的理论模型和仿真分析方法的正确性和可行性.

Oil Film Pressure Characteristics of Liquid Hybrid Bearings in the CNC Lathe

The spindle assembly of the highly precised CNC lathe was taken as the object， and the theoretical modeling of oil film pressure and the simulation analysis method of the hybrid bearing were studied. First， the Reynolds equation and the oil film’s loading capacity equation were transformed into dimensionless forms， and then the numerical method was used to solve the equation. Accordingly， the dimensionless of oil film pressure distribution and pressure values in different regions and the distribution regularity were obtained by further solving. In addition， the characteristics of oil film pressure distribution and the pressure field in different supply pressures and spindle speeds were obtained by using the fluid dynamics analysis software.The analysis results also provided important reference for further studies on the loading capacity and hybrid bearing design . The feasibility of theoretical modeling and simulation methods were also verified by comparing the results of theoretical analysis and simulation analysis.