一、概述曲轴是发动机的主要运动件,一向被人们喻为发动机的脊梁骨。它对整机可靠性起十分重要的作用。由于它的形状和受力复杂,并受邻近各零件装配关系的影响,所以在设计新型发动机或对老产品进行改造时,都必须对曲轴的强度严格地进行安全考核。特别是对弯曲疲劳强度的安全考核,更应引起足够的重视。 First, an overview Crankshaft is the engine of the main moving parts, has been hailed as the backbone of the engine. It plays a very important role in the reliability of the whole machine. Due to its complex shape and force and the influence of the assembly of adjacent parts, the safety of crankshafts must be rigorously evaluated when designing new engines or revamping older products. Especially for the safety assessment of bending fatigue strength, more attention should be paid.