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针对某柴油机连杆小头衬套松脱问题,提出2种连杆小头结构改进方案,分别从安装状态的衬套背压、工作状态的衬套滑移以及小头内孔变形三方面研究关键参数及敏感区域对结构刚度的影响。结果表明:增加衬套壁厚、增大连杆小头支撑刚度可有效增大衬套背压,减小内孔变形,降低衬套由切向力所导致的滑动风险。
In order to solve the problem of loosening of the small head bush of connecting rod of a diesel engine, two schemes for the improvement of the small head structure of the connecting rod are proposed, which are studied from the back pressure of the bush, the bush slippage in the working state and the deformation of the small hole Influence of Key Parameters and Sensitive Area on Structural Stiffness. The results show that increasing the liner wall thickness and increasing the support stiffness of the connecting rod can effectively increase the back pressure of the liner, reduce the deformation of the internal bore and reduce the risk of the liner sliding due to the tangential force.