箔片式动压空气轴承试验研究  

EXPERIMENTAL RESEARCH ON FOIL HYDRODYNAMIC AIR BEARING

作　　者：龙超 张跃春[1,2] 彭锐涛 胡雨浓[3] LONG Chao;ZHANG YueChun;PENG RuiTao;HU YuNong(School of Mechanical Engineering,Xiangtan University,Xiangtan 411100,China;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412000,China;Hunan Huifeng Fluid Technology Co.,Ltd.,Zhuzhou 412000,China)

机构地区：[1]湘潭大学机械工程学院,湘潭411100 [2]中国航发湖南动力机械研究所,株洲412000 [3]湖南慧风流体科技有限公司,株洲412000

出　　处：《机械强度》2022年第1期81-85,共5页Journal of Mechanical Strength

摘　　要：箔片式动压空气轴承是一种以箔片为弹性支承的自作用式动压气体轴承,因其优越的动力学性能广泛应用于高速透平机械、高精密机床以及航空、航天、国防等高端装备领域。箔片式动压空气轴承采用空气为润滑介质,根据动压润滑原理,轴颈与轴承间需要达到一定的相对速度,所形成的动压气膜才能克服转子径向力,使轴颈与轴承脱离机械接触,即转速要达到箔片式动压空气轴承的起飞转速。为了减少轴颈与轴承的机械接触时间,确定电机加速时间,准确测定其起飞转速具有重要的工程意义。提出了一种评判振动特征综合测定箔片式动压空气轴承起飞转速的方法,并对比分析出试验测定结果与箔片式动压空气轴承理论计算值基本一致,验证了理论计算方法的准确度,对于空气轴承的工程应用具有重要的意义。Foil hydrodynamic air bearing is a kind of self-acting hydrodynamic gas bearing which the foil is used for elastic support.Because of its superior dynamic performance,it is widely used in high-speed turbine machinery,high-precision machine tools,aviation,aerospace,national defense and other high-end equipment fields.The foil hydrodynamic air bearing uses the air as the lubricating medium,according to the principle of dynamic pressure lubrication,a certain relative velocity should be reached between the journal and the bearing,so that the dynamic pressure film formed can overcome the radial force of the rotor and make the journal and bearing separate from the mechanical contact,that is,the rotational speed should reach the takeoff velocity of the foil hydrodynamic air bearing.In order to reduce the mechanical contact time between journal and bearing,determine the acceleration time of the motor and accurately measure its takeoff velocity,which has important engineering significance.A method to determine the takeoff speed of foil hydrodynamic air bearing by evaluating the vibration characteristics is proposed.The analysed result shows that accords with the actual result,which verifies the accuracy of the theoretical calculation method and is of great significance to the engineering application of air bearing.

关 键 词：动压空气轴承 箔片 起飞转速 振动试验 

分 类 号：TH133.35[机械工程—机械制造及自动化]