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一、前言曲轴是柴油机的主要零件之一,它承受交变的弯曲和扭转载荷。曲轴的应力分布是很复杂的,特别是在油孔以及轴颈与曲柄连接处的过渡圆角部分存在着严重的应力集中,这将导致柴油机曲轴发生疲劳破坏。这点已为国内外大量柴油机的运行经验所证明,因而必须对圆角及油孔部分的设计予以特别的注意。戚墅堰机车车辆工厂试制的16V200ZL—2型高速柴油机,为了在不增加曲轴长度和不减薄曲柄的情况下,尽量增加轴颈有效长度,以增加轴瓦
First, foreword Crankshaft is one of the main parts of diesel engine, which bear alternating bending and torsional load. The stress distribution of the crankshaft is very complicated. In particular, there is a serious stress concentration in the oil hole and the transition fillet at the junction of the journal and the crank, which will lead to fatigue damage on the crankshaft of the diesel engine. This point has been proved by the operation experience of a large number of diesel engines both at home and abroad, so special attention must be paid to the design of the fillet and the hole portion. Qishuyan rolling stock factory prototype 16V200ZL-2 high-speed diesel engine, in order not to increase the crankshaft length and without reducing the crank case, try to increase the effective length of the journal to increase the bearing