带人字槽和轴向微通槽的动静压气体轴承静态特性

设计带人字槽和轴向微通槽的动静压气体轴承，运用FLUENT对其静态特性进行仿真分析，通过改变轴向微通槽深度、偏心率、气膜厚度、供气压力等参数，研究其对轴承刚度和承载能力的影响。结果表明：其他条件不变，偏心率越大，轴承刚度越小、承载能力越大；人字槽可以提升气体轴承的承载能力和刚度，主轴转速越快，动压效应越强，轴承刚度和承载能力越大；随微通槽深度增加，轴承刚度先增大后保持稳定，轴承承载能力先增大后减小，因此当微通槽深度过大时，轴承刚度变化不大，但轴承承载能力会减小。

Static Characteristics of Dynamic and Hydrostatic Pressure Gas Bearings with Herringbone Grooves and Axial Micro-channels

The dynamic and hydrostatic gas bearing with herringbone groove and axial micro through groove was designed,and the static characteristics were simulated and analyzed by FLUENT.The effects on the bearing stiffness and bearing capacity were studied by changing the parameters such as axial micro through groove depth,eccentricity,film thickness and air supply pressure.The results show that when other conditions remain unchanged,the greater the eccentricity,the smaller the bearing stiffness and the greater the bearing capacity.Herringbone grooves can enhance the bearing capacity and stiffness of gas bearing,the faster the spindle speed,the stronger the dynamic pressure effect,and the greater the bearing stiffness and bearing capacity.As the axial micro groove depth increases,the bearing stiffness first increases and then remains stable,and the bearing capacity first increases and then decreases.Therefore,when the axial micro groove depth is too large,the bearing stiffness changes little,but the bearing capacity will decrease.