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层叠式推力箔片轴承静特性仿真及试验研究

徐科繁 张广辉 韩佳真 黄钟文 吉世伟

徐科繁, 张广辉, 韩佳真, 等. 层叠式推力箔片轴承静特性仿真及试验研究[J]. 航空动力学报, 2024, 39(9):20220672 doi: 10.13224/j.cnki.jasp.20220672
引用本文: 徐科繁, 张广辉, 韩佳真, 等. 层叠式推力箔片轴承静特性仿真及试验研究[J]. 航空动力学报, 2024, 39(9):20220672 doi: 10.13224/j.cnki.jasp.20220672
XU Kefan, ZHANG Guanghui, HAN Jiazhen, et al. Simulation and experimental study on static characteristics of multi-layer thrust foil bearing[J]. Journal of Aerospace Power, 2024, 39(9):20220672 doi: 10.13224/j.cnki.jasp.20220672
Citation: XU Kefan, ZHANG Guanghui, HAN Jiazhen, et al. Simulation and experimental study on static characteristics of multi-layer thrust foil bearing[J]. Journal of Aerospace Power, 2024, 39(9):20220672 doi: 10.13224/j.cnki.jasp.20220672

层叠式推力箔片轴承静特性仿真及试验研究

doi: 10.13224/j.cnki.jasp.20220672
基金项目: 国家科技重大专项(2017-Ⅳ-0008-0045)
详细信息
    作者简介:

    徐科繁(1996-),男,博士生,主要从事气体箔片轴承研究

    通讯作者:

    张广辉(1982-),男,教授、博士生导师,博士,主要从事转子动力学研究。E-mail:zhanggh@hit.edu.cn

  • 中图分类号: V245.3

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

  • 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20000 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。

     

  • 图 1  层叠式推力箔片轴承

    Figure 1.  Multi-layer thrust foil bearing

    图 2  初始气膜厚度示意图

    Figure 2.  Initial film thickness distribution.

    图 3  厚板单元示意图

    Figure 3.  Thick plate element

    图 4  计算域及边界条件

    Figure 4.  Computational domain and boundary conditions

    图 5  轴承特性仿真流程图[3]

    Figure 5.  Flow chart of simulation for bearing characteristics[3]

    图 6  最小气膜厚度随承载力的变化曲线

    Figure 6.  Curves of the minimum of film thickness with load capacity

    图 7  网格无关性验证结果

    Figure 7.  Verification results of grid independence

    图 8  转速和间隙对承载力的影响

    Figure 8.  Influence of rotational speed and clearance on bearing capacity

    图 9  不同工况下轴承无量纲压力分布

    Figure 9.  Dimensionless pressure distribution under different working conditions

    图 10  不同工况下轴承无量纲箔片变形量分布

    Figure 10.  Dimensionless foil deformation distribution under different working conditions

    图 11  推力箔片轴承试验台

    Figure 11.  Thrust foil bearing test rig

    图 12  摩擦力矩和轴向载荷数据(Fpre=30 N)

    Figure 12.  Friction torque and axial load data (Fpre=30 N)

    图 13  不同预载荷下的起飞转速试验数据

    Figure 13.  Lift-off speed experimental data under different preloads

    表  1  层叠式箔片轴承的计算参数[18]

    Table  1.   Bearing parameters of multi-layer foil bearing[18]

    参数 数值
    扇形瓦外径R2/mm 21.5
    扇形瓦内径R1/mm 12.0
    扇形瓦块数N 8
    大气压力p0/Pa 101325
    气体动力黏度μ/10−5 (Pa·s) 1.932
    平箔片厚度tf/mm 0.1
    中间板厚度tm/mm 0.12
    支承板高度ts/mm 0.5
    箔片弹性模量E/1011 Pa 2.1
    箔片泊松比ν 0.3
    下载: 导出CSV

    表  2  层叠式箔片轴承的计算参数[19]

    Table  2.   Bearing parameters of multi-layer foil bearing[19]

    参数 数值
    扇形瓦外径R2/mm 57.15
    扇形瓦内径R1/mm 29.75
    扇形瓦块数N 12
    平箔片厚度tf/mm 0.27
    中间板厚度tm/mm 0.12
    支承板高度ts/mm 0.8
    转速Ω/104 (r/min) 5
    推力盘与轴承的间隙hg0/mm 0.01
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-09-08
  • 网络出版日期:  2023-10-27

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