层叠式推力箔片轴承静特性仿真及试验研究  

Simulation and experimental study on static characteristics of multi-layer thrust foil bearing

作　　者：徐科繁 张广辉[1] 韩佳真 黄钟文 吉世伟 XU Kefan;ZHANG Guanghui;HAN Jiazhen;HUANG Zhongwen;JI Shiwei(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Jincheng Nanjing Engineering Institute of Aircraft Systems,Aviation Industry Corporation of China,Limited,Nanjing 211106,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]中国航空工业集团有限公司金城南京机电液压工程研究中心,南京211106

出　　处：《航空动力学报》2024年第9期339-347,共9页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅳ-0008-0045)。

摘　　要：为阐明层叠式推力箔片轴承的流-固耦合机理,基于有限差分法和厚板单元建立了该轴承数值仿真模型,借助Newton-Raphson法将基于一阶滑移模型的可压缩雷诺方程线性化,基于迭代求解获取了该轴承静特性随工况参数的演变规律,搭建了层叠式推力箔片轴承起飞转速试验台,明确了起飞转速判断依据,数值结果和试验结果吻合较好。研究结果表明:当转速不大于20 000 r/min时,考虑滑移边界后轴承承载力普遍下降3%左右,此时应考虑该影响。由于二次楔形效应,小间隙时轴承压力分布呈明显的“双峰”状。轴承间隙内摩擦状态的改变会导致试验数据波动,据此可确定轴承起飞转速。与文献数据和试验数据的对比结果表明,相关数值仿真模型更适用于分析轴承重载情况。A simulation model was established based on the finite difference method and the thick plate element to clarify the fluid-solid coupling mechanism of multi-layer thrust foil bearing.The compressible Reynolds equation based on the first-order slip model was linearized by the Newton-Raphson method,and the evolution law of the static characteristics with the operating condition parameters was obtained by iterative solution.The lift-off speed test rig of thrust foil bearing was built,and the judgment basis of lift-off speed was clarified.The numerical results were in good agreement with the experimental results.The results showed that when the speed was not more than 20000 r/min,the bearing capacity generally decreased by about 3%after considering the slip boundary,which should be considered.Due to the secondary wedge effect,the pressure distribution under small clearance presented an apparent“double peak”shape.The change of the friction state in the bearing clearance could lead to the fluctuation of the experimental data,based on which the lift-off speed could be determined.The comparison results with literature data and experimental data indicate that the simulation model is more suitable for analyzing the bearing under a heavy load.

关 键 词：层叠式推力箔片轴承 滑移边界 有限差分法 静特性 起飞转速试验 

分 类 号：V245.3[航空宇航科学与技术—飞行器设计]