扭矩作用下垂向载荷对转轴表面微动损伤特性的影响

发布时间：2018-05-31 04:43

本文选题：转轴 + 垂向载荷　；参考：《机械工程材料》2017年01期

【摘要】：利用JD-1型轮轨模拟试验机研究了在扭矩作用下转轴表面的微动损伤,通过改变垂向载荷大小,研究了垂向载荷对转轴与轴承内圈过盈配合面微动损伤特性的影响,并借助激光共聚焦扫描电镜和扫描电子显微镜观察了损伤表面的磨痕和剖面的显微组织,分析了两种垂向载荷下转轴表面的微动损伤机理。结果表明:在垂向载荷作用下,转轴与左右两端轴承内圈过盈配合面处出现了微动损伤,磨损形式主要表现为黏着磨损和磨粒磨损;在垂向载荷较大的工况下,转轴配合面的表面磨损加剧,塑性变形层变厚,微动损伤变得更严重,并且左端配合面的磨损和塑性变形均比右端的严重,塑性变形层的厚度分布更加不均。
[Abstract]:The fretting damage of rotating shaft surface under torque is studied by using JD-1 wheel-rail simulator. By changing the vertical load, the influence of vertical load on the fretting damage characteristics of the interference fit surface between the shaft and the inner ring of the bearing is studied. The wear marks and microstructures of the damaged surface were observed by laser confocal scanning electron microscope and scanning electron microscope, and the mechanism of fretting damage on the surface of rotating shaft under two vertical loads was analyzed. The results show that fretting damage occurs at the interference surface between the rotating shaft and the inner ring of the left and right end bearing under vertical load, and the wear forms are mainly adhesive wear and abrasive wear. The surface wear of the shaft surface is aggravated, the plastic deformation layer becomes thicker, the fretting damage becomes more serious, and the wear and plastic deformation of the left side are more serious than those of the right side, and the thickness distribution of the plastic deformation layer is even more uneven.
【作者单位】：西南交通大学牵引动力国家重点实验室摩擦学研究所;
【基金】：国家自然科学基金资助项目(51475393)
【分类号】：TH117

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