华南理工大学学报(自然科学版) ›› 2016, Vol. 44 ›› Issue (7): 15-21.doi: 10.3969/j.issn.1000-565X.2016.07.003

• 机械工程 • 上一篇    下一篇

强振动环境对液压胶管寿命的影响

杨忠炯1,2 高雨2 周立强1,2 王卉2   

  1. 1. 中南大学 高性能复杂制造国家重点实验室,湖南 长沙 410083;2. 中南大学 机电工程学院,湖南 长沙 410083
  • 收稿日期:2015-11-16 修回日期:2016-03-10 出版日期:2016-07-25 发布日期:2016-06-05
  • 通信作者: 杨忠炯(1964-),男,博士,教授,主要从事液压流体机械研究. E-mail:yzj7072@126.com
  • 作者简介:杨忠炯(1964-),男,博士,教授,主要从事液压流体机械研究.
  • 基金资助:
    国家重点基础研究发展计划(973 计划)项目(2013CB035404)

A Probe into Life of Hydraulic Rubber Hose in Strong Vibration Environment

YANG Zhong-jiong1,2 GAO Yu2 ZHOU Li-qiang1,2 WANG Hui2   

  1. 1.State Key Laboratory of High Performance and Complex Manufacturing,Central South University,Changsha 410083,Hunan,China; 2.College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,Hunan,China
  • Received:2015-11-16 Revised:2016-03-10 Online:2016-07-25 Published:2016-06-05
  • Contact: 杨忠炯(1964-),男,博士,教授,主要从事液压流体机械研究. E-mail:yzj7072@126.com
  • About author:杨忠炯(1964-),男,博士,教授,主要从事液压流体机械研究.
  • Supported by:
    Supported by the National Program on Key Basic Research Project of China(973 Program)(2013CB035404)

摘要: 硬岩掘进机在切削岩石过程中产生振动载荷,液压胶管在振动载荷和内压共同作用下承受交变应力,当交变应力超过疲劳极限时,将发生疲劳破坏. 文中基于复合材料力学、材料力学原理建立了液压胶管的数学模型;通过仿真和实验分析了振动参数、油压和胶管结构参数对液压胶管寿命的影响. 结果表明:振动载荷激振频率接近胶管固有频率时,液压胶管的寿命最低;随着振动载荷振幅的增加,胶管寿命不断下降;中低压情况下,油压的变化对最外层钢丝的应力影响不大;液压胶管弯曲半径越大,所受应力越小.

关键词: 液压胶管, 振动载荷, 激振频率, 振幅, 最大主应力, 疲劳寿命

Abstract: In the process of rock cutting using hard-rock tunnel boring machines,vibration loads may occur,and alternating stress may load on hydraulic rubber hose under the action of vibration load and internal pressure.When the alternating stress exceeds the fatigue limit,fatigue damage may occur.In this paper,on the basis of composite material mechanics and materials mechanics,a mathematical model of hydraulic rubber hose is established.Then,the effects of vibration parameters,oil pressure and hose structure parameters on the life of hose are analyzed through simulation and experiments.The results show that (1) when the excitation frequency of vibration load is close to hose's natural frequency,the hose life reaches the minimum; (2) with the increase of vibration load ampli- tude,the life of rubber hose decreases; (3) at a middle-lower pressure,the change of oil pressure has little effect on the stress loaded on steel wire; and (4) bigger bending radius of hose may result in lower stress.

Key words: hydraulic rubber hose, vibration load, excitation frequency, amplitude, maximum principal stress, fa- tigue life

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