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湿式摩擦离合器挤压过程及接合特性分析

黄伟 鲍和云 朱楚 朱如鹏

黄伟,鲍和云,朱楚,等.湿式摩擦离合器挤压过程及接合特性分析[J].航空动力学报,2022,37(9):1992‑2000. doi: 10.13224/j.cnki.jasp.20210353
引用本文: 黄伟,鲍和云,朱楚,等.湿式摩擦离合器挤压过程及接合特性分析[J].航空动力学报,2022,37(9):1992‑2000. doi: 10.13224/j.cnki.jasp.20210353
HUANG Wei,BAO Heyun,ZHU Chu,et al.Analysis of squeeze process and engagement characteristics of wet friction clutch[J].Journal of Aerospace Power,2022,37(9):1992‑2000. doi: 10.13224/j.cnki.jasp.20210353
Citation: HUANG Wei,BAO Heyun,ZHU Chu,et al.Analysis of squeeze process and engagement characteristics of wet friction clutch[J].Journal of Aerospace Power,2022,37(9):1992‑2000. doi: 10.13224/j.cnki.jasp.20210353

湿式摩擦离合器挤压过程及接合特性分析

doi: 10.13224/j.cnki.jasp.20210353
基金项目: 

国家自然科学基金 51975274

国家科技重大专项(J2019⁃Ⅲ⁃0023⁃0067) 

详细信息
    作者简介:

    黄伟(1995-),男,硕士生,主要从事湿式摩擦离合器相关研究。

    通讯作者:

    鲍和云(1976-),女,副教授、硕士生导师,博士,主要从事直升机传动系统动力学研究。E⁃mail:baoheyun@nuaa.edu.cn

  • 中图分类号: V229

Analysis of squeeze process and engagement characteristics of wet friction clutch

  • 摘要:

    针对湿式摩擦离合器接合过程中的挤压机理及微凸体接触问题,综合考虑摩擦片表面油槽结构,材料渗透性等因素,根据修正雷诺方程和K⁃E(Kogut⁃Etsion)接触模型,对湿式摩擦离合器的挤压过程中的动压承载力、微凸体承载力以及转矩转速变化等建模分析,并采用有限差分法对修正雷诺方程求解,对挤压过程中的油膜压缩速度、油膜厚度变化率和片间承载力等挤压特性和转速、转矩等接合特性展开了仿真分析。并采用SAE#2试验机进行了相关试验获得了转速、转矩、压力、摩擦因数等数据,与仿真分析进行了对比。结果表明:湿式摩擦离合器接合过程可分为3个阶段,通常会在1 s内完成,在0.02 s左右开始从挤压阶段经压紧阶段在0.03 s左右过渡到全微凸体接触阶段,试验与理论分析结果一致。

     

  • 图 1  湿式摩擦离合器挤压模型

    Figure 1.  Squeeze model of wet friction clutch

    图 2  K⁃E微凸体接触模型

    Figure 2.  K⁃E asperity contact model

    图 3  求解域网格

    Figure 3.  Solving domain grid

    图 4  求解域油槽分布

    Figure 4.  Distribution of grooves in the solution domain

    图 5  双圆弧槽几何结构

    Figure 5.  Geometric structure of double arc groove

    图 6  模型求解流程

    Figure 6.  Model solution process

    图 7  试验压力与拟合曲线

    Figure 7.  Test pressure and fitting curve

    图 8  油膜压缩速度及油膜厚度变化曲线

    Figure 8.  Curve of oil film compression speed and oil film thickness

    图 9  无量纲承载力及活塞压力曲线

    Figure 9.  Dimensionless bearing capacity and piston pressure curve

    图 10  转速变化曲线

    Figure 10.  Rotation speed variation curve

    图 11  转矩变化曲线

    Figure 11.  Torque variation curve

    图 12  SAE#2试验台及摩擦片安装过程

    Figure 12.  SAE#2 test bench and friction plate installation process

    图 13  摩擦片和钢片试验件

    Figure 13.  Test pieces of friction plate and steel plate

    图 14  试验摩擦因数

    Figure 14.  Test friction factor

    图 15  试验转矩变化曲线

    Figure 15.  Test torque variation curve

    图 16  试验转速变化曲线

    Figure 16.  Test rotation speed variation curve

    表  1  摩擦副结构参数与试验条件

    Table  1.   Friction pair structure parameters and test conditions

    类别参数数值
    试验参数制动转速n1/(r/min)6 000
    系统转动惯量J/(kgm2)0.343 9
    初始油膜厚度hi/m0.000 1
    最大加载压力pmax/MPa1.0
    润滑油参数黏度η/(Pas)0.012
    密度ρ/(kg/m3870
    几何特征摩擦副内径ro/mm73
    摩擦副外径ri/mm59
    油槽深度hg/mm0.3
    油槽宽度wg/mm1
    油槽基圆半径Rb/mm50
    油槽轨迹半径Rg/mm30
    油槽阵列数量Ng55
    材料特性联合表面粗糙度方均根σ/10-6 m8.4
    微凸体分布密度λ/107 m-27
    微凸体半径R/10-4 m8
    衬片材料渗透性ϕ/10-13 m28
    摩擦片泊松比ν10.3
    钢片泊松比ν20.4
    摩擦片弹性模量E1/GPa10.59
    钢片弹性模量E2/GPa206
    较软材料硬度Ha/GPa2.8
    下载: 导出CSV
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  • 收稿日期:  2021-07-07

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