激光毛化形貌对高速轮轨冰润滑黏着系数的影响
Influence of Laser Texturing Topography on Adhesion Coefficient of High-speed Wheel/Rail in Ice Lubrication
查看参考文献15篇
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文摘
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轮轨黏着系数对于列车运行的安全性与稳定性具有决定性的影响。在冬季,钢轮表面的薄冰会大幅降低轮轨黏着系数。根据水的相图和压力融化原理,将轮轨接触区域划分为钢-冰固体接触区和钢-水混合润滑接触区,基于统一雷诺方程模型,研究了温度在-21℃至0℃,运动速度为100~500km/h范围内,高速轮轨黏着系数随速度的变化规律,并提出采用激光毛化技术在车轮表面形成规则形貌(纵纹、横纹、菱形),将有助于提高冰水混合润滑状态下的轮轨黏着系数,为高速列车黏着控制技术提供理论基础。 |
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其他语种文摘
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The adhesion coefficient between the wheel and rail has a significance influence on the safety and stability of the train operation.In winter a thin film of ice presemed onrail will greatly reduce the wheel-rail adhesion coefficient.In this paper the contact region of wheel/rail will be divided into two regions,that is the solid contact region of ice-steel and the mixed lubrication contact region of water-steel according to the phase diagram of ice and the principle of pressure melt.The adhesion coefficient of high-speed wheel/rail is investigated with the variation of speed from 100km/h to 500km/h under the temperature region from -21℃to 0℃ based on the unified Reynolds equation.Regular patterns on wheel surface,such as longitudinal, transverse and rhombus,formed by laser texturing,will improve the adhesion coefficient of wheel/rail under ice-water mixed lubrication.The investigation is helpful for adhesion controlling technology of high-speed railway. |
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来源
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应用激光
,2019,39(4):652-659 【扩展库】
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DOI
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10.14128/j.cnki.al.20193904.652
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关键词
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弹流润滑
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表面形貌
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激光毛化
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黏着系数
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地址
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1.
中国科学院大学工程科学学院, 北京, 100049
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中国科学院力学研究所, 中国科学院先进制造工艺力学重点实验室, 北京, 100190
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河北科技大学理学院, 河北, 石家庄, 050080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-372X |
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学科
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一般工业技术 |
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基金
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国家自然科学基金资助项目
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国家973计划
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文献收藏号
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CSCD:6570094
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