曲轴聚焦

  • 曲轴在发动机中的作用是借助连杆将活塞的上下运动转换成旋转运动。其产生的扭力将传递给飞轮。
  • BF提供两种不同工艺的曲轴,整体铸造或通过螺钉固定平衡块的锻造曲轴。活塞、连杆和曲轴一起构成曲轴传动系统。
  • 为了保证高的质量标准,大部分 BF 曲轴使用自有的工具进行生产,并且所有产品均受到严格的检查。
  • 鉴于商用车的高负载,BF 严格遵循原厂配件的产品(OE)规格及标准,提供几乎涵盖所有种类的锻造曲轴。
  • 为确保新更换曲轴具有更长的使用寿命,我们建议您同时更换以下部件:
    • 主轴瓦
    • 主轴瓦螺栓
    • 连杆轴瓦
    • 连杆轴瓦螺栓
    • 密封组件

结构

1.控制或驱动端
2.配重
3.主轴颈
4.连杆轴颈
5.飞轮端/功率输出
6.油孔

组成部件

主轴颈

  • 主轴颈的数量取决于发动机结构形式。
  • 曲轴支撑在发动机缸体的主轴颈上。

连杆轴颈

  • 连杆轴颈中心相对于主轴颈中心的间距限定行程(曲柄半径)。
  • 气缸行程、直径和数量确定发动机的行程容积。

飞轮端

  • 飞轮固定架。

控制或驱动端

  • 减振器/皮带轮的固定架。
  • 凸轮轴驱动装置齿轮

油孔

  • 通过油孔给连杆和主轴承位置供应机油。
  • 主轴颈通过曲轴内的油道给连杆轴颈供油。

曲轴配重

  • 活塞和连杆的单面旋转质量通过曲柄臂配重平衡。由此可以补偿外部力矩,并将内部力矩控制到最小,从而降低振动幅度和轴承负荷。

硬度区

  • 为了降低磨损并提高曲轴负荷能力,主轴颈与连杆轴颈被硬化和抛光。

版本

整体锻造平衡

  • 例如:5 缸直列发动机 OM 611

螺钉铆接式平衡

  • 例如:6 缸直列发动机 OM 335

偏置连杆轴颈

  • 例如:6 缸 V 型发动机 OM 501

扭转式曲轴连杆轴颈

  • “为了在连杆轴颈上实现其它曲轴转角,在锻造成型之后对曲轴再次加热,并且在支点处进行扭转加工。
  • 例如:6 缸直列发动机 OM 906

双连杆曲轴

  • 例如:8 缸 V 型发动机 OM 422

曲轴传动

1 活塞
2 连杆
3 飞轮
4 曲轴

产品范围

锻造曲轴用于:

  • 商用车发动机
  • 工业机械发动机
  • 燃气发动机
  • 农业和林业机械发动机

曲轴配件:

  • 齿轮
  • 曲轴瓦
  • 平衡螺栓
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