徐贤发^1,2,卜祥玮^1,2,马灵童^1,2,王文平^1,2,朱健^1,2,周竹杰^1,2

1.内燃机可靠性国家重点实验室，山东 潍坊  261061；2.潍柴动力股份有限公司发动机研究院，山东 潍坊  261061

摘要：分析发动机前端轮系张紧轮故障原因，提出在发电机上应用单向超越离合皮带轮的改进措施，对改进后的前端轮系进行功能性、可靠性、耐久性试验和仿真分析。结果表明：发动机超越离合皮带轮具有较高可靠性，可以有效解决张紧轮摆角大导致的张紧器阻尼磨损故障，改善前端轮系的运行状态，提高噪声、振动与声振粗糙度（noise, vibration, harshness，NVH）性能。本文中单向超越离合皮带轮的研发方案不仅可用于解决前端轮系的故障，也可作为解决因转速波动导致的其他传动系统故障的参政。

关键词：前端轮系；转速波动；单向超越；可靠性；NVH

Abstract：The failure of the tensioner in the front end accessory drive (FEAD) is analyzed, the one-way overrunning clutch pulley on the generator is proposed for improvement. The reliability and durability tests and simulation analysis of the improved FEAD are carried out. The results show that the one-way overrunning clutch pulley has high reliability, which can effectively solve the tensioner damping block’s wear failure caused by the large swing angle of the tensioner. The running performance of FEAD and NVH performance are also improved. The research and development scheme of the one-way overrunning clutch pulley, can not only be used for the trouble shooting of the FEAD, but also provide a reference for solving other transmission system failures caused by speed fluctuation.

Keywords:FEAD; speed fluctuation; one-way clutch; reliability; NVH