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90系列柴油机的连杆螺母上,铣有两条方向错开的切槽,精加工后在端面上施加一定的压力,使切槽产生塑性变形(切槽宽由0.8变为0.5~0.6毫米),起自行锁紧作用。但该螺母经多次拆卸使用后,切槽容易弹性疲劳,使弹力减弱,自锁作用变差或失去自锁作用。如不注意,在运转中切槽螺母会自行松脱,使连杆盖高速甩出,打坏箱体,造成严重事故。为避免上
90 Series diesel engine connecting rod nut, milling two slots staggered direction, after finishing the surface to exert a certain pressure, the slot plastic deformation (slot width from 0.8 to 0.5 ~ 0.6 mm) Self-locking effect. However, after the nut has been dismantled and used for many times, the grooving is easy to be elastically weakened, the elastic force is weakened, the self-locking effect is deteriorated or the self-locking effect is lost. If you do not pay attention, in the operation of slotted nut will be loosened, so that the connecting rod cover thrown at high speed, broken box, causing serious accidents. To avoid it