| 引用本文: | 李群,丁昊昊,师陆冰,张沭玥,李佳辛,王文健,刘启跃.水基摩擦调节剂作用下轮轨黏着恢复过程*[J].中国表面工程,2022,35(1):107~115 |
| LI Qun,DING Haohao,SHI Lubing,Zhang Shuyue,LI Jiaxin,WANG Wenjian,LIU Qiyue.Recovery Process of Wheel/rail Adhesion under the Action of Water-based Friction Modifier[J].China Surface Engineering,2022,35(1):107~115 |
|
| 摘要: |
| 摩擦调节剂(FM)在轮轨界面黏着行为调控方面具有广阔的应用前景，但目前针对其作用下的恢复过程研究开展较少。在 MJP-30A 轮轨滚动磨损与接触疲劳试验机上进行 FM 及基本液体组分水和丙三醇溶液不同加入量工况下的轮轨黏着恢复试验，获得不同加入量工况下黏着系数随循环转数恢复过程的完整曲线，分析三种液体恢复时间及润滑状态。结果表明： 不同液体介质下的轮轨黏着恢复过程曲线有较大差异，与干态相比，水、丙三醇溶液、FM 界面状态使黏着系数明显降低， 且水、丙三醇溶液工况下黏着系数出现二次减小后逐渐恢复增加至稳定水平；随 FM 加入量的增加，恢复时间逐渐增加直至趋于为稳定，加入足量 FM 后，恢复过程润滑状态先后经历弹性流体润滑、混合润滑、边界润滑，直至最后干摩擦；FM 加入量为 200 μL 时，出现黏着系数降低至 0.1 以下现象，试验工况下 FM 极限加入量为 200 μL；随循环转数的增加，FM 的流变指数逐渐减小，FM 承担压力逐渐减小，固体微凸体承担压力逐渐增加，流变指数由 1 减小至 0.75 时固体承载率由 1%增加至 46%。揭示了水基 FM 作用下轮轨黏着恢复机理，可为其在实际现场应用提供参考依据。 |
| 关键词: 轮轨黏着 摩擦调节剂 润滑状态 恢复过程 |
| DOI：10.11933/j.issn.1007-9289.20210909002 |
| 分类号:TG156;TB114 |
| 基金项目:国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0109400)；国家自然科学基金(52027807)；四川省科技计划苗子工程(2021JDRC0086)资助项目 |
|
| Recovery Process of Wheel/rail Adhesion under the Action of Water-based Friction Modifier |
|
LI Qun, DING Haohao, SHI Lubing, Zhang Shuyue, LI Jiaxin, WANG Wenjian, LIU Qiyue
|
|
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031 , China
|
| Abstract: |
| Friction modifier (FM) has broad application prospects in the field of the control of wheel/rail interface adhesion behavior, however, the studies on the recovery process are rarely carried out. The wheel-rail adhesion recovery test under the conditions of water, glycerol and FM is carried out on the MJP-30A wheel-rail rolling-sliding wear and contact fatigue test machine. The recovery curves of the adhesion coefficient as the function of the number of cycles under different quantities of liquid are obtained. The recovery time and lubrication state are studied under three liquid conditions. The results show that the wheel-rail adhesion curves of recovery process under different liquid conditions are quite different. Compared with the dry condition, the water, glycerin solution and FM conditions could result in a significant decrease in the adhesion coefficient. Under the conditions of water and glycerin solution, the adhesion coefficient was declined twice, and then gradually increased to a stable level. The recovery time gradually increased subsequently to a stable level with the increase in the quantity of FM. With the excess of FM, the lubrication state of the recovery process experienced the elastohydrodynamic lubrication, mixed lubrication, boundary lubrication, and the dry condition at last. When the addition amount was 200 μL, the initial adhesion coefficient was reduced to less than 0.1 and the limit of FM addition was 200 μL. With the increase in cycle revolutions, the rheological index of FM gradually and the pressure carried by FM gradually were decreased, and the pressure carried by asperity was gradually increased. The load carried by asperity was increased from 1% to 46% with the rheological index decreasing from 1 to 0.75. The research reveals the wheel/rail adhesion recovery mechanism under the action of water-based FM, which provides and accumulates reference basis for its practical field application. |
| Key words: wheel/rail adhesion friction modifier lubricate state recovery process |
