基于小孔节流的液体动静压球轴承界面滑移下的承载性能分析  

ANALYSIS OF BEARING PERFORMANCE OF HYDRODYNAMIC AND HYDROSTATIC BALL BEARINGS UNDER INTERFACE SLIP BASED ON ORIFICE THROTTLING

作　　者：周羿好 沈景凤[1] 陈雨飞 ZHOU YiHao;SHEN JingFeng;CHEN YuFei(College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机械强度》2022年第3期641-648,共8页Journal of Mechanical Strength

基　　金：上海市扬帆计划项目(19YF1434500)资助。

摘　　要：为研究界面滑移对使用小孔节流方式的液体动静压球轴承承载力的影响,基于线性滑移模型,建立了考虑界面滑移的球轴承Reynolds方程。结合有限差分法和松弛迭代法耦合求解Reynolds方程和油膜厚度方程,计算了考虑界面滑移的液体动静压球轴承的油膜压力分布和承载能力。结果表明:液体动静压轴承供油压力越大,转速越高,油膜间隙越小,动压效应越强,轴承承载能力越大;考虑滑移效应,界面滑移导致油膜压力增大,且对于轴承承载力的影响存在临界值;当油膜间隙越大,滑移系数临界值越大,液体滑移效应越强,承载能力在滑移程度低于临界值时会增大,在高于临界值时会逐渐减小。Due to study the influence of interfacial slip on the bearing capacity of hydrostatic and hydrostatic ball bearings with small orifice throttling, the Reynolds equation of ball bearings considering interfacial slip was established based on the linear slip model of interfacial slip. The Reynolds equation and the oil film thickness equation are solved by the finite difference method and the relaxation iterative method. The oil film pressure distribution and bearing capacity of the hydrostatic ball bearing considering interface slip are calculated. The results study that the higher the oil supply pressure, the higher the rotational speed, the smaller the oil film clearance, the stronger the dynamic pressure effect and the greater the bearing capacity of the hydrostatic bearing. Considering the sliding effect, the interface sliding leads to the increase of oil film pressure, and the influence on bearing capacity has a critical value. When the oil film gap is larger, the critical value of slip coefficient is larger, the liquid slip effect is stronger, and the carrying capacity increases when the slip degree is lower than the critical value, but decreases when the slip degree is higher than the critical value.

关 键 词：液体动静压球轴承 小孔节流 界面滑移 有限差分法 承载能力 

分 类 号：TH133.36[机械工程—机械制造及自动化]