本文通过对轮轨接触几何关系的分析计算,阐述了SY-50型机车车轮磨耗形踏面的设计、各项技术参数及主要技术特性。分析计算表明,SY-50型踏面设计合理,性能可靠,与钢轨有良好的匹配特性,对我国的机车和线路情况有广泛的适应性。几年来的装车试验表明,采用该型踏面可使轮缘磨耗减少50%,并可延长轮箍寿命,节省人力、材料和能源,获得了显著的技术经济效果。 In this paper, through the analysis of wheel-rail contact geometry, the design, technical parameters and main technical characteristics of SY-50 locomotive wheel wear tread are expounded. The analysis shows that SY-50 tread has reasonable design, reliable performance and good matching characteristics with rails, and has a wide adaptability to locomotives and lines in our country. Over the years loading tests have shown that using this type of tread reduces wheel rim wear by 50% and extends tire life, saving manpower, materials and energy, with significant technical and economic benefits.