摘要
为解决某新型发动机在耐久试验时出现的气缸套穴蚀故障,分析气缸套刚度、发动机扭振及其他可能导致气缸套穴蚀的原因,并提出改进措施;对改进后的气缸套装机进行500 h发动机耐久试验。结果表明:气缸套刚度不足且整机振动过大是导致该发动机气缸套发生穴蚀的主要因素,且二者相互耦合,加剧了穴蚀进程;增加气缸套壁厚、对气缸套外壁及凸肩表面实施滚压工艺、调整气缸垫片位置等可以提高缸套刚度;优化飞轮转动惯量可以消除发动机主要振动激励源,减小发动机振动;发动机耐久试验后,气缸套外壁光滑,内壁未出现异常磨损,气缸套穴蚀故障得到解决。
To address the cavitation failure of cylinder liners occurring during the endurance test of a new-type engine,the causes potentially leading to cylinder liner cavitation are analyzed,including cylinder liner stiffness,engine torsional vibration and other related factors,and corresponding improvement measures are proposed.Subsequently,the improved cylinder liners are assembled on the engine for a 500 h endurance test.The results show that insufficient cylinder liner stiffness and excessive overall engine vibration are the primary factors causing cylinder liner cavitation,and the coupling effect between the two further accelerates the cavitation process.Increasing the cylinder wall thickness,adopting rolling process on the outer wall and shoulder surface of the cylinder liner,and adjusting the position of cylinder gaskets can effectively improve the cylinder liner stiffness.Optimizing the flywheel moment of inertia can eliminate the main vibration excitation source of the engine and reduce engine vibration.After the engine endurance test,the outer walls of the cylinder liners remain smooth and no abnormal wear is found on the inner walls,indicating that the cylinder liner cavitation failure has been completely resolved.
作者
郑昊鹏
张广峰
张翠云
张振胜
张新月
王瑞丽
ZHENG Haopeng;ZHANG Guangfeng;ZHANG Cuiyun;ZHANG Zhensheng;ZHANG Xinyue;WANG Ruili(Marine Comprehensive Support Division,No.708 Research Institute,China State Shipbuilding Co.,Ltd.,Qingdao 266071,China;CNPC Jichai Power Company Limited,Jinan 250306,China)
出处
《内燃机与动力装置》
2026年第1期99-104,111,共7页
Internal Combustion Engine & Powerplant
基金
中国石油天然气集团公司研发项目(F-G60023LE)。
关键词
柴油发动机设计
气缸套穴蚀
刚度分析
滚压技术
发动机振动
结构改进
diesel engine design
cylinder liner cavitation
stiffness analysis
rolling technology
engine vibration
structure improvement
