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J.of
J.ofTrib.,
抹膜,比氮化硅滚子软的氧化钛微粒可以减少混
合轴承的磨损、降低温升;而比滚子硬的微粒加剧轴承磨损、温度升高。这条结论对认识纳米颗粒的润滑性能也有指导意义。2.3 仍需研究的问题
(1)重载或微载荷下滚动-滑动-自旋复合运动时润滑油脂的摩阻力特性仍需试验研究,以确定轴承中滚动体的摩阻力特性,尤其是缺少这种运动状态下混合润滑时的试验数据。
(2)自润滑保持架材料的摩擦系数仍需在实际保持架/滚子的摩擦碰撞接触工况下测定。
(3)对转移膜润滑的高速球轴承中保持架的磨损率、转移过程及其摩擦系数变化仍需进一步研究,尤其对复合材料保持架在轴承运转中的转移膜特性需要试验研究。
3 结束语
(1)国外滚动轴承动力学分析认为滚动体/保持架兜孔间隙比保持架/引导边间隙小,则保持架会出现涡动。
(2)接触区的摩阻力系数、混合润滑膜的刚度与阻尼随载荷、温度和润滑剂流变特性等参数变化,仍有待进一步研究。
(3)国内的滚动轴承设计中要实现参数优化,必须建立自己的轴承动力学分析软件包,以现有设计数据为基础建立轴承产品的优化设计数据库。
(4)为了降低轴承噪声、消除异常声,更精确的轴承动力学设计是亟待解决的问题。参考文献:
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