调心滚子轴承参数.doc

调心滚子轴承参数调心滚子轴承内圈有两列滚道，外圈为球面滚道，外圈滚道面与轴承中心一致，具有自动调心性能，一般所允许的调心角度为12.5，适用于转轴可能出现挠曲或偏斜的场合，也可在有一定永久偏斜的情况下使用。该类轴承承受径向载荷的能力较大，同时也能承受任一方向的轴向载荷，但不能承受纯轴向载荷，在轴向力特别大的情况下还常常要附加轴向承载轴承。调心滚子轴承的滚子与滚道的密合度很高，其摩擦远大于圆柱滚子轴承，因此，一般来说，调心滚子轴承所允许的工作转速较低。根据内圈有无挡边及所用保持架的不同，可分为C型与CA型两种基本型式，C型轴承的特点是内圈无挡边并采用钢板冲压保持架，CA型轴承的特点则为内圈两侧均有挡边且采用车制实体保持架。该类轴承特别适用于重载荷或振动载荷下工作。20000 C型轴承采用对称球面滚子和钢板冲压保持架，内圈无固定挡边，滚子加长，承载能力大，活动中挡圈引导滚子，调心性能好。 20000 CC型轴承是20000 C型轴承的改进型，改进后的轴承滚子和滚道间的摩擦减小，载荷能力提高。20000 CA型轴承采用对称球面滚子和实体保持架，内圈带固定小挡边和活动中挡圈。该种结构型式轴承的主参数、额定载荷和极限转速与相应型号的20000 CC型轴承相同。20000 TN1型轴承采用对称球面滚子和尼龙成型保持架，内圈无固定挡边和活动中挡圈，保持架由滚子引导。20000 CC型、20000 CA型和20000 TN1型轴承是近年发展并经优化设计的结构型式，应优先选用。调心滚子轴承多用于轧钢机、造纸机械、动力传动装置及船舶机械等。外 形 尺 寸mm倒角基本额定载荷KN轴承代号重量极限转速r/minDimensionsmmChamferBasic Load RatingsDesignationWeightSpeed 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