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Keywords: abrasive water jet, rail maintenance, orthogonal experiment.

Abstract

With the growth of the global economy and technological breakthroughs, not only the mileage and scope of railways have greatly increased, but also the speed and load of trains have also increased rapidly, which has brought enormous pressure to the rails, resulting in increasingly prominent problems such as rail fatigue and wear. Therefore, it is necessary to repair the rail regularly. The current mainstream online repair method is the repair of the rail repair car, which mainly includes the repair of the rail grinding car and the repair of the rail milling and grinding car. However, metal sparks, dust and noise will be generated during the operation. The environment is harsh and may cause the rail to turn blue, the maintenance cost is high, and the versatility is poor. Abrasive water jet machining technology is a cold working technology. If applied to rail repair, it will neither cause thermal damage to the rail surface nor produce metal sparks, dust and noise. The working environment is comfortable and environmentally friendly. Therefore, this paper studies the theoretical and practical feasibility of abrasive water jet repairing rails combined with the existing rail repair technology and abrasive water jet machining technology. The results show that after the single factor and orthogonal experiments, it is found that the factors of water jet pressure, target distance, jet erosion angle, feed speed and abrasive flow rate have different effects on the rail grinding effect. The influence of water jet pressure and feed speed within the range is the most obvious, followed by abrasive flow and jet erosion angle, and the effect of target distance is small. At the same time, when the jet erosion angle is 10° to 15°, the grinding effect is the best, Sand width and depth are balanced.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 32.6 Experiment on abrasive water jet on the maintain of rail C. Huang and X. Long A Key Laboratory of Jet Theory and New Technology of Hubei Province, School of Power and Mechanical Engineering, Wuhan University, Hubei, China doi:10.4203/ccc.1.32.6 Full Bibliographic Reference for this paper C. Huang, X. Long, "Experiment on abrasive water jet on the maintain of rail", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 32.6, 2022, doi:10.4203/ccc.1.32.6 Keywords: abrasive water jet, rail maintenance, orthogonal experiment. Abstract With the growth of the global economy and technological breakthroughs, not only the mileage and scope of railways have greatly increased, but also the speed and load of trains have also increased rapidly, which has brought enormous pressure to the rails, resulting in increasingly prominent problems such as rail fatigue and wear. Therefore, it is necessary to repair the rail regularly. The current mainstream online repair method is the repair of the rail repair car, which mainly includes the repair of the rail grinding car and the repair of the rail milling and grinding car. However, metal sparks, dust and noise will be generated during the operation. The environment is harsh and may cause the rail to turn blue, the maintenance cost is high, and the versatility is poor. Abrasive water jet machining technology is a cold working technology. If applied to rail repair, it will neither cause thermal damage to the rail surface nor produce metal sparks, dust and noise. The working environment is comfortable and environmentally friendly. Therefore, this paper studies the theoretical and practical feasibility of abrasive water jet repairing rails combined with the existing rail repair technology and abrasive water jet machining technology. The results show that after the single factor and orthogonal experiments, it is found that the factors of water jet pressure, target distance, jet erosion angle, feed speed and abrasive flow rate have different effects on the rail grinding effect. The influence of water jet pressure and feed speed within the range is the most obvious, followed by abrasive flow and jet erosion angle, and the effect of target distance is small. At the same time, when the jet erosion angle is 10° to 15°, the grinding effect is the best, Sand width and depth are balanced. download the full-text of this paper (PDF, 5 pages, 262 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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