发动机连杆轴承异响故障分析研究  

Abnormal Knocking of Connecting Rod Bearing of Engine

作　　者：张玲玲[1,2] 任金成[1] 张海峰 肖静[1] 

机构地区：[1]军事交通学院汽车工程系 [2]96274部队

出　　处：《振动．测试与诊断》2014年第2期379-384,403,共6页Journal of Vibration,Measurement & Diagnosis

摘　　要：从动力学角度对发动机连杆轴承异响故障进行研究，以某军车发动机为研究对象，采用汉氏法求解雷诺方程，计算分析了在相同的润滑条件下，不同工况、不同转速以及轴承配合间隙下连杆轴承的负荷和轴心轨迹。分析结果表明：相同工况下，作用在活塞顶部的气体压力是影响连杆轴颈负荷的主要因素，连杆轴承的横向运行轨迹会随着轴承间隙的增大而扩大，连杆轴承异响最佳诊断转速为中速1200-1600r／min，最佳诊断部位是发动机的右侧曲轴轴承对应的缸体处。In order to explore the abnormal knocking of the connecting rod bearing of engines from the point of view of dynamics,a certain model engine of military vehicle is taken as object.Hamn′s method is adopted to solve Reynolds equation,and the load and center movement track of the connecting rod bearing is accounted and analyzed in the same lubricating state and under different working conditions,rotation speed,and match clearance.Results show that the pressure measured in the engine cylinder worked on piston top is the main factor of the connecting rod bearing′s load.The horizontal running track becomes larger with increasing match clearance of the bearing,the optimum speed is in the middle(1 200~1 600r/ min),and the optimal diagnosis position is located at the right cylinder blocks facing the bearing.

关 键 词：轴心轨迹 汉氏法 异响故障 发动机 

分 类 号：TK428[动力工程及工程热物理—动力机械及工程]