【摘要】 本文论述了连杆螺栓连接松动的原因,并指出横向交变动载荷是使螺纹松动的主要因素。横向振动试验机是评定紧固件连接性能的新型试验装置。通过在此试验机的横向振动对比试验,认为CA6102发动机连杆螺栓的结构设计、材料选择、螺纹配合间隙、硬度值等均属合理。文中指出防止松动的关键是控制其拧紧力矩和保证有关部位的形位公差。更多还原

【Abstract】 In this paper, the mechanism of self-loosening of con-rod bolts is discussed. It has been found that transverse cyclic load is the most important factor affecting self-loosening of con-rod bolts. Transverse vibration testing machine is a new device for evaluating the connecting performance of the fasteners. Based on the comparative tests of various con-rod bolt versions for CA6102 engine it is concluded that the structural design, material adoption, thread fitting and hardness of the exis- ting bolts are all reasonable. Finally, it gives emphasis to the importance of controlling the optional tightening torque and ensuring the form and position tolerance in key area.更多还原