摘要
强制连续型超越离合器是直升机传动系中的关键部件。在高速超越状态下及楔合过程中均伴有磨损发生,致使超越离合器工作状态发生改变,磨损后导致的楔块翻转和楔块弹出是离合器的主要故障形式。推导了超越离合器正常楔合的摩擦角条件,通过建立超越离合器动力学模型,分析了超越离合器磨损后"弹出现象"的产生原因,以及弹出现象对离合器的影响。通过动力学仿真得知,初始接触角过大和离合器磨损后引起的接触角增大均会导致楔块弹出现象的发生,弹出现象发生后离合器输出转速剧烈波动。讨论结果可用于直升机传动系统的故障诊断。
The Positive -continous -engagement （PCE） overrunning clutch is the key component in hel- icopter transmission system. With wearing happened both in the high - speed differential speed and gripping process that lead to the change of the working condition of PCE overrunning clutch. The sprag flip and the sprag pop - in and out caused by wearing is the main failure mode of the clutch. The grip friction angle condition is derived, by establishing the dynamic model of the clutch, the reason of the sprag pop - in and out phenomenon and its influences on the clutch is analyzed. Based on the result, both the excess of initial engage angle and the increase of the engage angle caused by clutch wear will lead to the sprag Pop - in and out. The result could be used in the fault diagnosis of helicopter transmission system.
作者
盖小涛
赵永强
刘明
Gai Xiaotao Zhao Yongqiang Liu Ming(Department of Mechanical and Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China School of Mecha/ronics Engineering, Harbin Institute of Technology, Harbin 150001, China)
出处
《机械传动》
CSCD
北大核心
2017年第9期106-110,共5页
Journal of Mechanical Transmission
关键词
超越离合器
楔合角
楔块翻转
楔块弹出
Overrunning clutch Engage angle Sprag flip Sprag pop -in and out
