基于ANSYS-FLUENT的高精密液体静压径向轴承动静态特性研究

以液体静压轴承为支撑的电主轴是高精密数控机床的一个最为关键的组成部件。静压轴承润滑油膜的压力分布、刚度和温度场的分布直接影响数控机床的加工精度。基于液体静压技术理论，对轴承的流量、静压腔压力和刚度进行数值计算。基于ANSYS-FLUENT联合仿真平台，以液体静压径向轴承的润滑油膜为研究对象，对其压力场、流场和温度场分布等进行了静态和瞬态的研究，仿真结果与数值计算结果取得了很好的一致性。分析表明，静压腔内的润滑油的压力和温度分布不会因为主轴的转速变化而发生明显的变化，而周向封油边和轴向封油边是压力和温度变化的敏感位置。

Research on Dynamic and Static Characteristics of the High Precision Hydrostatic Radial Bearing Based on ANSYS-FLUENT Co-simulation Platform

The motorized spindle supported by hydrostatic bearing is one of the most critical components of the high precision CNC machine tools. The pressure distribution, stiffness and temperature field distribution of the oil film directly affect the machining accuracy of NC machine tools. Based on hydrostatic technology theory, the flow rate and hydrostatic cavity pressure and stiffness of the bearing were calculated numerically. Based on the ANSYS FLUENT co simulation platform, taking the lubricating oil film of hydrostatic radial bearing as the research object, the pressure field, flow field and temperature field distribution were studied including the static and transient status. The simulation results and the numerical results obtain a very good consistency. Analysis shows that the pressure and temperature distribution of the lubricating oil in the hydrostatic cavity have no significant change when the spindle speed changes and circumferential and axial sealing edges are the position where the pressure and temperature change sensitively.