基于车轮廓形磨耗分析的地铁经济镟修策略
许承焯沈钢
Metro Economic Re-profiling Strategy Based on Wheel Profile Wear Analysis
XU ChengzhuoSHEN Gang
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作者信息:同济大学铁道与城市轨道交通研究院， 201804， 上海
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Affiliation:Institute of Rail Transit, Tongji University, 201804, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.07.003
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中图分类号/CLCN:U270∶331+1∶U231.94
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栏目/Col:学术专论
摘要:
目的：为协助地铁部门制定车辆轮对镟修策略，选择更优的车轮镟修公里数节点及制定每次镟修时的模板选用方案，在保证经济性的前提下延长车轮使用寿命。方法：从轮缘磨耗面积、镟修轮径损失值和车轮轮径3个指标出发，搭建了一种考虑整列车磨耗规律的经济镟修模型。基于所建模型，对某地铁的一个案例进行了研究。找出该地铁列车车轮的轮缘磨耗面积、镟修轮径损失值和车轮轮径3个指标的磨耗变化规律后，将其输入到所建模型中进行迭代计算。根据计算结果中的不同镟修公里数节点下的车轮寿命、单位成本里程数和最后一次镟修后可运行里程数等指标，制定选择镟修公里数节点所应遵循的原则，最后根据计算结果和所提原则给出优选的经济镟修公里数节点和镟修模板选用方案。结果及结论:研究结果表明，若该地铁列车的新轮首次镟修采用轮缘厚度为30 mm的模板，后续的镟修采用轮缘厚度为28 mm的模板，则相较该地铁部门以往在列车运行里程为31.2万km左右时镟轮，采用模型计算给出的21.7万km优选的镟修公里数节点，在保证镟修经济性的情况下，最多能延长车轮总寿命里程为11.7万km，车轮寿命延长了8.3%。
Abstracts:
Objective: To assist metro department in formulating vehicle wheelset re-profiling strategy, a better wheel re-profiling mileage node is selected and the template schemes for each re-profiling operation are formulated, with the goal of prolonging wheel service life while ensuring economic efficiency.Method: Starting from the three indexes: flange wear area, diameter loss of re-profiled wheel and wheel diameter, an economic re-profiling model studying the wear law of the entire train is established. Based on the model, a metro case is studied. After obtaining the wear change law of the above three indexes for metro train wheels, the data is input into the established model for iterative calculation. Based on different indicators at different re-profiling mileage nodes in calculation results such as wheel lifespan, mileage per unit cost, and available mileage after the final re-profiling operation, the principles for selecting the optimal re-profiling mileage nodes are formulated. Finally, based on the calculation results and the proposed principles, the optimal economic re-profiling mileage nodes and template selection schemes are given. Result & Conclusion: Research results show that if the new wheels of a metro train are initially re-profiled using the template with flange thickness of 30 mm, and the template with flange thickness of 28 mm for the subsequent re-profiling, then compared to the metro department past practice of re-profiling wheels at around 312 000 km of train operation mileage, the model calculation recommends an optimal re-profiling mileage node of 217 000 km, which can extend the wheel lifespan total mileage by a maximum of 117 000 km and the wheel lifespan itself by 8.3% while ensuring the economic efficiency of re-profiling.
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