某发动机张紧器故障原因分析及前端轮系优化

Analysis of Tensioner’s Malfunction and Optimization on Engine Front End Accessory Drive System

针对某发动机空调-发电机层自动张紧器故障率高问题,将其与风扇-水泵层轮系进行对比分析,张紧器故障率高是由张紧臂摆角过大导致的。通过优化,将空调-发电机层轮系由曲轴驱动改为风扇托架驱动,通过计算优化后空调-电机层轮系的张紧臂摆角降低到0.5°以下,并通过市场验证,证实了方案的有效性。

Aiming at the high failure rate of the automatic tensioner in the air-conditioner-generator gear train of an engine,it is found that the high failure rate of the tensioner is caused by the excessive swing angle of the tensioner arm by comparing it with the fan-pump gear train.Through optimization,the air-conditioner and generator gear train was changed from crankshaft drive to fan carrier drive.After calculation,the swing angle of the tensioning arm of the air-conditioner and generator gear train was reduced to less than 0.5°,and the validity of the scheme was verified by market verification.