论文部分内容阅读
三层复合材料是以钢为基体,烧结铜网为中间层,经过改性增强的塑料为表面层,具有自润滑性能的轴承材料。它弥补了塑料的缺点,克服了金属干摩擦系数过大及不耐磨的弊病。表层以聚四氟乙烯为主的三层复合材料可作为自润滑材料;表层以聚甲醛为主的三层复合材料可作为边界润滑材料。东风_4型内燃机车万向轴十字头轴承原采用滚针轴承。这种轴承在高载荷低速摇摆运动作用下,十字头轴颈常出现布氏压痕,导致滚针压偏、折断。改用Mc尼龙套和铜
Three-layer composite material is based on steel, sintered copper mesh as the middle layer, after modification of the plastic surface layer, with self-lubricating bearing material. It makes up for the shortcomings of plastic, to overcome the shortcomings of the metal dry friction coefficient is too large and not wear-resistant. The polytetrafluorethylene-based three-layer composite material can be used as self-lubricating material; the three-layer composite material with polyoxymethylene as the surface layer can be used as the boundary lubrication material. Dongfeng _4 diesel locomotive universal joint crosshead bearing the original needle roller bearings. This bearing under high load low-speed swinging movement, the crosshead journal often appear Brinell indentation, resulting in needle pressure deviation, broken. Use Mc nylon sleeve and copper