某型柴油机凸轮轴断裂故障监测预警技术研究  

Research on Fault Monitoring and Early Warning Technology forCamshaft Fracture of A Certain Diesel Engine

作　　者：辛博[1] 高志龙[1] 江志农[1] 智海峰 雷建新 XIN Bo;GAO Zhilong;JIANG Zhinong;ZHI Haifeng;LEI Jianxin(Key Laboratory of Engine Health Monitoring-Control and Networking,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China;China North Engine Research Institute(Tianjin),Tianjin 300400,China)

机构地区：[1]北京化工大学发动机健康监控及网络化教育部重点实验室,北京100029 [2]中国北方发动机研究所(天津),天津300400

出　　处：《内燃机工程》2023年第2期100-108,共9页Chinese Internal Combustion Engine Engineering

基　　金：中央高校基本科研业务费专项项目(ZY2104);装备重大基础研究项目(514010507-205)。

摘　　要：基于动力学模型仿真分析揭示凸轮轴断裂故障的发生机理,并且借助振动数据的挖掘分析故障的特征信号,开展基于模型和数据驱动的柴油机凸轮轴断裂故障监测预警技术研究,并通过实际工程案例验证了结论的正确性。研究结果表明:柴油机的凸轮轴第1轴肩与第2缸、第4缸、第6缸缸盖附近为薄弱位置,凸轮轴在满功率高转速的工况下易在这些位置发生断裂。凸轮轴断裂故障发生前,柴油机正时异常,位于前端盖的振动加速度信号轴向明显大于径向,故障临近处的缸盖振动加速度明显大于其他位置。According to the simulation analysis of dynamic model,the occurrence mechanism of camshaft fracture fault was revealed,and the characteristic signal of fault was analyzed by vibration data mining.Fault monitoring and early warning technology for camshaft fracture of a diesel engine based on model and data drive was developed.Through the actual engineering case,the correctness of the research conclusion was revealed.The results show that there were weak positions near the first shoulder of the camshaft and the second,fourth and sixth cylinder heads of the diesel engine.The camshaft tended to break at these positions under the condition of full power and high speed.Before the fracture failure of camshaft occurred,the diesel engine timing was abnormal,and the vibration acceleration signal located in the front cover was obviously larger in the axial direction than in the radial direction.The vibration acceleration of the cylinder head near the fault was significantly greater than that of other positions.

关 键 词：柴油机 凸轮轴 模型 数据 故障监测预警 

分 类 号：TK407[动力工程及工程热物理—动力机械及工程]