浮环弹性变形对浮环动静压轴承润滑特性的影响  

Influence of Floating Ring Elastic Deformation on the Lubrication Characteristics for Floating Ring Hydrodynamic/Hydrostatic Bearing

作　　者：杨帅 侯军兴[1] 席双惠 安晓东 YANG Shuai;HOU Junxing;XI Shuanghui;AN Xiaodong(School of Mechanical Engineering,Zhengzhou University of Aeronautics,Zhengzhou Henan 450046,China)

机构地区：[1]郑州航空工业管理学院机械工程学院,河南郑州450046

出　　处：《润滑与密封》2024年第4期154-161,共8页Lubrication Engineering

基　　金：河南省高等学校重点科研项目(23A460005);河南省科技攻关计划项目(232102220036,232102320199)。

摘　　要：浮环轴承在高速工况下运行时,浮环表面在油膜压力作用下会发生弹性变形,影响轴承润滑性能。针对带有深浅腔的浮环动静压轴承,采用有限元法和有限差分法耦合求解油膜Reynolds方程、能量方程和温黏关系式,采用变形矩阵法求解弹性变形方程,计算浮环弹性变形分布;在浮环平衡的基础上,分析浮环变形对环速比、油膜承载力、端泄流量等润滑特性参数的影响。结果表明:浮环弹性变形分布与油膜压力分布呈现一致性,转速越高,偏心越大,变形越明显;考虑浮环弹性变形,浮环达到平衡状态时,内膜偏心率增加,环速比减小,轴承承载力与摩擦力矩均有所增加;由于浮环变形对内、外膜间隙及流动液阻的不同影响,使得内膜端泄流量增加,外膜端泄流量减少。The floating ring will generate elastic deformation under the effect of the lubricated film pressure for high-speed journal floating ring bearing,which affects the bearing lubrication performance.For a floating ring hydrodynamic/hydrostatic bearing with deep/shallow pockets,the finite element method and finite difference method were employed to solve Reynolds equation coupled with energy equation and temperature-viscosity equation,and the deformation matrix method was applied to solve the elastic deformation equation.The floating ring deformation distribution was obtained,and the influences of deformation on the ring speed ratio,load carrying capacity and oil flow leakage were analyzed based on floating ring equilibrium.The results indicate that the elastic deformation distribution is consistent with film pressure field,and the elastic deformation increases with the increase of shaft speed and eccentricity.While considering floating elastic deformation and the floating ring reaches equilibrium,the inner film eccentricity ratio increases,the ring speed ratio drops,and both load carrying capacity and friction moment increase.Due to the different influence of the elastic deformation on inner and outer clearances and flow resistances,inner film flow leakage grows,whereas the outer film flow leakage drops.

关 键 词：浮环动静压轴承 弹性变形 浮环平衡 润滑特性 端泄流量 

分 类 号：TH117[机械工程—机械设计及理论]