High Speed Cryogenic Blasting for Rail Cleaning to Alleviate Low Adhesion

用于钢轨清洁的高速低温喷砂可缓解低附着力

• 批准号: 971745
• 金额: $ 47.84万
• 依托单位: UNIVERSITY OF SHEFFIELD
• 依托单位国家: 英国
• 项目类别: Small Business Research Initiative
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=971745
• 关键词: Speed; Cryogenic; Blasting; Rail; Cleaning

High Speed Cryogenic Blasting for Rail Cleaning to Alleviate Low Adhesion Low adhesion in the wheel/rail interface causes safety concerns if a train is unable to stop as required. Associated delays result in fines and passenger dissatisfaction. Unpredictable braking and traction is the variation in adhesion conditions in the wheel/rail contact. The fluctuations that occur are largely related to the presence of contaminants on the rail head such as water (as dew or precipitation), leaves, oil, metal oxides or wear debris. One way to overcome the problem is to clean the rail head to leave a more consistent surface. Previous work has shown that rail head cleaning using dry-ice blasting provides many benefits over the water jetting currently used. As the dry-ice pellets impact a contaminant layer they cool it causing it to crack and debond. Further bombardment, and the blast as the pellets turn into gas, then acts to remove it. This approach leaves no residual material and will not damage wheels or rails. In Autumn 2019 a road-to-rail mounted system was successfully trialled with Network Rail across five routes. This system can now be rolled out to clean rail where rail head treatment trains (RHTTs) are unable to pass and will be used on the West Highland Line to clean for the whole of Autumn 2020. In this project, with support of stakeholders such as Network Rail, Northern Trains Ltd., Stagecoach Supertram (Sheffield) and Nexus (Tyne and Wear Metro), work will be carried out develop a high speed cryogenic cleaning system that can operate at at least 60mph to match the operating capability of a current RHTT and asses the viability of having cleaning capability on passenger trains. This will involve adapting the technology for trials on the Nexus Rail Head Treatment Train and a Northern Trains Ltd. passenger train. Development work will be carried out using the University of Huddersfield HAROLD full-scle wheel/rail test-rig (which can operate up to 125mph) to find the optimum application parameters for the higher speeds attained by these vehicles over those used in previous testing. As the cryogenic pellets can be generated onboard a train, their use allows a high speed rail head treatment platform to be much smaller than a current RHTT and they will be able to clean for longer distances.

如果列车不能按要求停车，轮轨界面的低附着力会引起安全问题。相关的延误导致罚款和乘客不满。不可预测的制动和牵引力是车轮/轨道接触时附着条件的变化。所发生的波动在很大程度上与钢轨头部存在污染物有关，例如水（如露水或降水）、树叶、油、金属氧化物或磨损碎片。克服这个问题的一种方法是清洁导轨头部以留下更一致的表面。以前的工作表明，使用干冰爆破清洁轨道头部比目前使用的水射流有许多好处。当干冰颗粒撞击污染物层时，会使其冷却，导致其破裂和脱落。进一步的轰击，当弹丸变成气体时，爆炸就会把它移走。这种方法不会留下任何残留材料，也不会损坏车轮或轨道。2019年秋季，英国铁路网在5条线路上成功试用了公路到铁路安装系统。该系统现在可以用于清洁铁路车头处理列车（rhtt）无法通过的轨道，并将在2020年整个秋季用于西高地线的清洁。在该项目中，在网络铁路，北方火车有限公司，Stagecoach Supertram（谢菲尔德）和Nexus（泰恩和威尔地铁）等利益相关者的支持下，将开展开发高速低温清洁系统的工作，该系统的运行速度至少为60英里/小时，以匹配当前RHTT的运行能力，并评估在客运列车上具有清洁能力的可行性。这将涉及将该技术应用于Nexus Rail Head Treatment列车和Northern Trains Ltd.客运列车的试验。开发工作将使用哈德斯菲尔德大学HAROLD全尺寸轮轨试验台（可运行高达125英里/小时）进行，以找到这些车辆比之前测试中使用的车辆获得更高速度的最佳应用参数。由于低温颗粒可以在火车上产生，它们的使用使得高速铁路头部处理平台比目前的RHTT小得多，并且它们将能够清洁更远的距离。