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            常州市嘉权机械制造有限公司嘉权机械制造

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            专业向用户提供质量可靠的轴承产品

            过热造成的轴承损坏原因分析

            发布时间:2020-10-19
            过热造成的滚动轴承损坏现象:轴承部件严重变色*)。滚道/滚动体塑性变形严重。温度急剧变化。轴承多次粘着,见图77。硬度低于58HRC。原因:通常不再检测由于过热导致的失效轴承。可能的原因:– 轴承的工作游隙太小,特别是高速下的轴承– 润滑不足– 由于外部热源造成的径向预载–

            润滑剂过量– 由于保持架断裂造成运转受阻补救措施:– 加大轴承游隙– 如果有外部热源,要确保缓慢加热和冷却,也就是使整套轴承均匀受热– 避免润滑剂堆积– 改善润滑47对拆下的轴承评估运转特性和损坏情况。
             
            滚动轴承的接触模式77:过热的FAG圆柱滚子轴承的滚道上滚子留下了很深的胶着的压痕。*) 变色的说明:当轴承呈现出回火颜色时与过热有关。呈现出的褐色和蓝色与温度高低和过热时间长短有关。这种现象与由于润滑油温度高而使其着色的现象很类似(见3.3.1.1章节)。因此不能仅从变色一

            项上来判断运转温度是否过高。从变色区域可以判断是由回火还是由油脂造成的变色:后者通常仅出现在滚动体和套圈的承载区,前者通常大面积地覆盖在轴承表面。然而,是否存在高温运转的鉴定措施是硬度检测。
             
            轴承出现划痕现象:对于可分离的圆柱滚子轴承或圆锥滚子轴承,其滚动体和滚道上有和轴线平行且与滚动体等间距的材料缺失。有时在周向上会有几组痕迹。通常只在大约B/d的周向而不是整个周向有此痕迹,见图76。原因:在安装单个套圈和带有滚动体的套圈时不对中而且互相挤擦。当移动

            质量大的组件时尤其危险(装有轴承内圈和滚动体组件的粗轴推入已装在轴承座里的外圈时)。补救措施:– 使用合适的安装工具– 避免不对中– 如可能,在安装部件时缓慢转动。
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