轮轨表面水介质混合润滑数值模拟

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (19) : 261-268.

论文

轮轨表面水介质混合润滑数值模拟

王骁鹏,彭文昱,赵新泽,田红亮,郤能,赵美云

作者信息 +

Numerical solution on the mixed lubrication of wheel/rail contact interface under wet conditions

WANG Xiaopeng,PENG Wenyu,ZHAO Xinze,TIAN Hongliang,XI Neng, ZHAO Meiyun

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文章历史 +

摘要

雨雪、潮湿等环境下，轮轨接触界面处于混合润滑状态，界面间的流体动压效应不可忽视，轮轨间的黏着系数降低，导致黏着力降低。根据确定的轮轨接触几何参数，建立考虑真实机械加工表面的混合润滑模型，模拟轮轨滚动接触界面水润滑状态，通过对比车削加工的纵纹粗糙表面与光滑表面数值解，结果表明：在水介质存在状态下，粗糙表面接触载荷比增加会大幅提高黏着系数；列车行驶速度较快时，混合润滑状态下轮轨黏着系数较小，不利于列车安全平稳运行；轮轨接触副在混合润滑状态下接触压力小于干接触状态接触压力，有利于提高轮轨接触副使用寿命。该研究可为轮轨表面设计提供了重要的理论依据。

Abstract

The contact interface of wheel/rail is situated in mixed lubrication state under the conditions of rain, snow or humid environment. The fluid dynamic pressure effect is obvicus, causing the adhesion coefficient to decrease, which results in the decrease of adhesion. A mixed lubrication model was established with considering the real surface roughness of the elliptical contact. A numerical simulation was carried out on the lubrication state of the rolling contact interface of wheel/rail and the calculation solutions for the rough machined surface and the smooth surface were compared. The results show that the adhesion coefficient is mainly depended on the ratio of asperity contact pressure to the total pressure in mixed lubrication. When the train is running with high speed, the wheel/rail contact interface is in mixed lubrication conditions and the adhesion coefficient is small. So, it is not conductive to the train operating safety and smoothness under water lubrication with high speed. Compared with dry contact, the wheel/rail contact pair has smaller contact pressure peak under mixed lubrication with water medium. And mixed lubrication is beneficial to improve the service life of wheel/rail contact pairs. The study provides a theoretical foundation for the surface design of wheel and rail systems.

导出引用

王骁鹏,彭文昱,赵新泽,田红亮,郤能,赵美云. 轮轨表面水介质混合润滑数值模拟[J]. 振动与冲击, 2019, 38(19): 261-268

WANG Xiaopeng,PENG Wenyu,ZHAO Xinze,TIAN Hongliang,XI Neng, ZHAO Meiyun. Numerical solution on the mixed lubrication of wheel/rail contact interface under wet conditions[J]. Journal of Vibration and Shock, 2019, 38(19): 261-268

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