径向不对中微织构气体箔片轴承静态特性分析

为进一步探究表面形貌对气体箔片轴承的影响，采用数值分析方法分析不对中情况下表面粗糙度和表面微织构对径向气体箔片轴承静特性的影响。利用超松弛迭代(SOR)和有限差分法对气体箔片轴承的Reynolds控制方程进行求解，通过模拟仿真分析不同微织构形状、深度、数量、占比以及表面粗糙度下轴承的静特性。研究结果表明：不同形状微织构对气体箔片轴承性能影响不同，椭圆形微织构提高轴承静特性的效果较好；微织构深度、数量和占比存在一组相对最优值，可在提升轴承承载力的同时降低摩擦力矩；与无微织构轴承相比，具有特定参数微织构的径向气体箔片轴承承载力提高了36.32%,摩擦力矩降低了1.66%。

Static Characteristics Analysis of Radially Misaligned Textured Gas Foil Journal Bearing

To further investigate the effect of surface morphology on gas foil bearings,the effect of surface roughness and surface texture on the static characteristics of radial gas foil bearings under misalignment was investigated by numerical analysis.The Reynolds control equation of the gas foil bearing was solved by Successive Over Relaxation (SOR) and finite difference method.The static characteristics of the bearings were analyzed under different parameters,including the texture shape,texture depth,texture number,texture ratio and surface roughness.The results show that the effects of different shapes of textures on the performance of gas foil bearings are different,and the elliptical texture is more effective in improving the static characteristics of the bearings.There exists a set of relatively optimal values of the texture depth,texture number and texture ratio,which can improve the bearing load capacity and reduce the frictional moment at the same time.Compared with the non-textured radial gas foil bearings,the radial gas foil bearing with specific texture can increase the load carrying capacity by 36.32% and reduced the frictional torque by 1.66%.