Abstract:  Based on the application requirements of aquatic-aerial amphibious propellers for the clutch, a gear overrunning clutch was designed. The engagement characteristics of clutch under different structure parameters were optimized for analysis through simulation. The effects of end face chamfer and displacement coefficient of gear tooth on engagement processes, disengagement speed and contact impact force were discussed. The simulation results show that increase of the angle of end face chamfer and displacement coefficient may accelerate engagement and disengagement speed and reduce contact impact force. When the number of chamfers and the coefficient of displacement are as 44° and 0.84 respectively, the engagement characteristics are optimal. If they continue to increase, the engagement and disengagement speed becomes slower and the contact impact force becomes larger. Finally, the gear tooth structure parameters with the optimal engagement characteristic index are obtained, and the correctness and validity of the simulation analysis results were verified by experiments. And the relative errors of the engagement characteristic index of simulation and experiments are less than 10%. The effectiveness of the optimized design process is proven, and the design results meet the requirements for the use of the propellers.

Key words: aquatic-aerial amphibious propeller, overrunning clutch, engagement characteristics, contact impact force

摘要： 从水空两用推进器对离合器的应用需求出发，设计了一种齿式超越离合器。通过仿真对离合器在不同结构参数下的接合特性进行优化分析，讨论了轮齿端面倒角和变位系数对接合过程、脱开速度和接触冲击力的影响规律。仿真结果表明，增大端面倒角度数和变位系数，可加快接合、脱开速度，减小接触冲击力；当倒角度数和变位系数分别为44°和0.84时，接合特性最优。继续增大倒角度数和变位系数，则接合、脱开速度变慢，接触冲击力变大。最后得到了接合特性指标最优的轮齿结构参数，并通过实验验证了仿真分析结果的正确性和有效性，仿真与实验的接合特性指标相对误差小于10%，证明了优化设计过程的有效性，设计结果满足推进器使用要求。

关键词: 水空两用推进器, 超越离合器, 接合特性, 接触冲击力