北京航空航天大学学报 ›› 2016, Vol. 42 ›› Issue (2): 251-257.doi: 10.13700/j.bh.1001-5965.2015.0387

• 论文 • 上一篇    下一篇

基于混合润滑理论的航空作动器密封性能分析

欧阳小平1, 薛志全1, 彭超1, 郭生荣2, 周清和2, 杨华勇1   

  1. 1. 浙江大学流体动力与机电系统国家重点实验室, 杭州 310027;
    2. 中航工业金城南京机电液压工程研究中心, 南京 211106
  • 收稿日期:2015-06-12 出版日期:2016-02-20 发布日期:2016-03-01
  • 通讯作者: 欧阳小平,Tel.:0571-87951274 E-mail:ouyangxp@zju.edu.cn E-mail:ouyangxp@zju.edu.cn
  • 作者简介:欧阳小平 男,硕士,副教授,硕士生导师。主要研究方向:飞机液压、电液控制以及外骨骼机器人。Tel.:0571-87951274 E-mail:ouyangxp@zju.edu.cn
  • 基金资助:
    国家自然科学基金(51275450,51221004);国家"973"计划(2014CB046403)

Analysis on aircraft cylinder seal property based on mixed lubrication theory

OUYANG Xiaoping1, XUE Zhiquan1, PENG Chao1, GUO Shengrong2, ZHOU Qinghe2, YANG Huayong1   

  1. 1. State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, Hangzhou 310027, China;
    2. Nanjing Engineering Institute of Aircraft Systems, Jincheng, AVIC, Nanjing 211106, China
  • Received:2015-06-12 Online:2016-02-20 Published:2016-03-01

摘要: 针对航空作动器不同压力、温度以及作动速度的工作环境,以Trelleborg公司Turcon VL密封为代表,利用混合润滑理论对其性能进行分析,揭示机载工况对航空作动器密封性能的影响规律。建立了基于混合润滑理论的宏观与微观多场耦合模型,包括:考虑空化及流动因子的Reynolds方程油膜模型、Greenwood-Williamson(G-W)的微观接触模型以及Fourier的传热模型。通过有限体积法求解,分析不同压力下宏观接触压力、微观接触压力以及油膜压力分布特点。研究结果表明:随流体压力增大,泄漏量与摩擦力都近似线性增大;在25℃时无泄漏,而温度升高至135℃时产生少许泄漏;随作动速度增大,摩擦力减小但泄漏量增大。

关键词: 航空作动器, VL密封, 混合润滑模型, 多场耦合, 有限体积法

Abstract: Aimed to investigate the influences of working conditions such as different pressures, temperatures and velocities on the performance of the seal of the aircraft cylinder, the Turcon VL seal from Trelleborg AB was analyzed based on the mixed lubrication theory. The macro and micro multi-field coupling model based on the mixed lubrication theory was built, which mainly includes fluid model with cavitation and fluid factors in Reynolds equation, micro contact model of Greenwood-Williamson(G-W) and heat transfer model of Fourier. By computing the model with finite volume method, the characteristics of macro contact pressure, micro contact pressure and oil pressure distribution under different fluid pressures were analyzed. The research results show that the seal leakage and friction increases nearly linearly with the fluid pressure increasing, the seal has no leakage at 25℃ but has some at 135℃, and the seal friction decreases but leakage increases with the cylinder velocity increasing.

Key words: aircraft cylinder, VL seal, mixed lubrication model, multi-field coupling, finite volume method

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