螺旋超越离合器结构设计及动态接合性能研究OA

In order to further improve the bearing capacity of the overrunning clutch under extreme conditions and prolong its serv-ice life,a new type of spiral overrunning clutch with simple structure and low pair instead of high pair was designed.Considering the constraints of self-locking and de-wedge,minimum spring preload,wear resistance and strength,the structural design of the spiral overrunning clutch was carried out.Further,the clutch dynamics simulation model was established for the actual working conditions,and the two working conditions of start-up engagement and differential engagement were simulated and analyzed.The influence of key parameters such as the friction coefficient between the inner and outer rings and the intermediate ring and the thread angle on the differential engagement performance of the clutch was compared and analyzed.The results show that the de-signed spiral overrunning clutch has good engagement performance;the impact torque during differential engagement is larger than that during start-up engagement(approximately 2 times the rated torque),and start-up engagement can be preferentially se-lected in practical use.The thread angle has a great influence on the impact torque of the differential engagement of the spiral over-running clutch,and the friction coefficient between the inner and outer rings and the intermediate ring has a great influence on the engagement time of the clutch,which provides a feasible technical scheme for the application of the spiral overrunning clutch.