具有鸟翼轮廓仿生槽的动静压气体轴承静态特性分析

Static Characteristics Analysis of Hybrid Gas Bearing with Bionic Groove of Bird Wing Profile

基于仿生学原理和几何重构法,在动静压气体轴承上设计具有鸟翼轮廓仿生槽,以提高其承载能力及刚度。运用变分法求解雷诺方程并使用FLUENT软件,对鸟翼轮廓仿生槽动静压气体轴承进行静态特性仿真分析,研究轴颈转速、供气压力、偏心率、槽深以及槽偏角对轴承静态特性的影响。结果表明:在偏心率相同时,随着轴颈转速的增加,轴承承载能力和刚度随之增大,随着供气压力的增加,轴承承载能力逐渐增加、刚度逐渐减小;当气膜厚度一定时,随着槽深的增加,轴承承载能力和刚度呈现先增加后减小的趋势,随着槽偏角的增加,轴承承载能力和刚度呈现先增加后减小的趋势。

Based on bionics principle and geometric reconstruction method,bionic grooves of bird wing profile were designed on the hybrid gas bearings to improve their bearing capacity and stiffness.Using the variational method to solve the Reynolds equation and the FLUENT software,the static characteristics of the hybrid gas bearing with bionic groove of bird wing profile were simulated and analyzed.The effects of journal speed,air supply pressure,eccentricity,groove depth and groove deflection angle on the static characteristics of the bearing were studied.The results show that when the eccentricity is the same,the bearing capacity and stiffness of bearings increase with the increase of journal speed,and decrease with the increase of air supply pressure.When the film thickness is constant,the bearing capacity and stiffness of bearings increase first and then decrease with the increase of groove depth,and first increase and then decrease with the increase of the groove deflection angle.