非均匀供气静压气体径向轴承的静特性分析  

Analysis on Static Characteristics of Externally Pressurized Gas Journal Bearings with Asymmetric Gas Supply

作　　者：赖天伟[1] 任雄豪 赵琪 陈双涛[1] 侯予[1] LAI Tianwei;REN Xionghao;ZHAO Qi;CHEN Shuangtao;HOU Yu(School of Energy and Power Engineering,Xi'an Jiaotong L niversitv,Xi'an Shaanxi 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《润滑与密封》2021年第12期1-6,共6页Lubrication Engineering

基　　金：陕西高校青年创新团队项目;国家自然科学基金项目(51976150)。

摘　　要：非均匀供气可以实现静压气体轴承的刚度调节,增强轴承的承载能力。为了探究非均匀供气条件对静压气体轴承内压力分布和静态特性的影响,以双排供气径向气体轴承为研究对象,采用数值计算对不同供气方式(变压供气孔位置、区域范围)和供气压力下轴承的静态特性进行了研究。数值计算结果表明:变压供气孔的位置对轴承的静特性有较大影响;当在主要承载区内增大供气压力时,可显著增强轴承的动静压效应;增加压力可变的区域范围有助于提升轴承承载力,但耗气量也相应有所增加;增加承载侧供气压力和减小非承载侧供气压力都可以有效提升轴承承载力,后者还可以减小气体总流量;承载侧与非承载侧的供气压差越大,越有利于轴承承载力的提升。In aerostatic journal bearing,load capacity and bearing stiffness can be improved through asymmetric air supply.In order to explore the influence of asymmetric air supply conditions on pressure distribution and static characteristics of aerostatic bearings,the double row air supply aerostatic journal bearing was taken as the research object,and the static characteristics of the bearing under different air supply types(variable pressure air supply hole position and area)and air supply pressure were studied by numerical calculation.The numerical results indicate that the position of variable air supply pressure has a great influence on the static characteristics of the journal bearing.When increasing the air supply pressure in the main bearing area,the aerodynamic and aerostatic effect of the bearing can be significantly enhanced.The bearing load capacity can be elevated with increasing variable pressure area,but the pressurized gas consumption is also increased correspondingly.The bearing capacity can be improved effectively by either increasing the air supply pressure on the loading side or reducing the gas supply pressure on the counter-loading side.The latter method can also reduce the total mass flow rate of pressurized gas.The greater air supply pressure difference between the loading side and the counter-loading side is more conducive to the improvement of bearing capacity.

关 键 词：静压气体轴承 径向轴承 非均匀供气 静态特性 承载能力 

分 类 号：TH133.36[机械工程—机械制造及自动化]