1曲轴断裂(1)受力过大。汽缸供油过早、过大、曲轴平衡铁装配不当等造成曲轴受力过大致动平衡破坏,会使曲轴折断。预防:保证各缸工作均匀,及时对柴油机进行调整和修理,必要时进行解体修理和调整,保证曲轴转动平衡。(2)螺栓松动。飞轮联接螺栓松动,会造成轴键槽处裂纹;主轴承盖螺母松动,会造成曲轴支承力减弱,冲击力增 1 crankshaft rupture (1) too much stress. Cylinder fuel supply is too early, too large, improper assembly of crankshaft balance iron caused by the crankshaft caused by excessive dynamic balance damage, will make the crankshaft broken. Prevention: to ensure uniform work of the cylinder, timely adjustment and repair of the diesel engine, if necessary, disintegration repair and adjustment to ensure that the crankshaft rotation balance. (2) Loose bolts. Flywheel coupling bolts loose, can cause cracks in the shaft keyway; the main bearing cap nut loose, will cause the crankshaft bearing force decreased, the impact of increased