弹簧激发段的预压缩量对离合器接合性能的影响

Influence of the Pre-compression Amount of the Spring Excitation Segment on the Meshing Performance of the Spring Clutch

弹簧离合器是通过弹簧两端激发圈在壳体内预压缩产生摩擦力矩实现自激的,弹簧两端激发圈预压缩量的大小直接影响离合器的结合性能及使用寿命。运用有限元方法建立了弹簧离合器动力学模型,求解了不同端部预紧量下高速弹簧离合器输出壳体与输入壳体速度的同步性,以及弹簧的Mises应力和径向位移,由此得到了弹簧离合器自激接合的弹簧预压缩量条件,并与解析求解得到的离合器临界预压缩量进行了对比。此外,有限元分析结果表明,稳态接合后弹簧的应力分布呈M型,弹簧的过渡线圈段应力出现峰值,而中间端应力分布均匀。该分析可为弹簧离合器的优化设计提供依据。

The self-excitation of the spring clutch is realized through the pre-compression between the excitation coils at either end of the spring and housing to generate frictional torque to energize the spring.The pre-compression amount of excitation coils at either end of the spring has a great impact on the binding property and lifetime of spring clutch.The spring clutch dynamics model is established by using the finite element analysis method.On ABAQUS platform,the speed synchronization of high speed spring clutch output shell and the input shell,the Mises stress and radial displacement of spring under different pre-compression are solved,and then the pre-compression amount condition of the self-exciting meshing of the spring clutch is obtained,and it is compared with the critical amount of pre-compression of clutch obtained by the analytic solution.Besides,the finite element analysis results show that the steady state stress distribution of spring exhibits M shape,that is,the transition coils have peak stress while the middle coils have uniform stress distribution.The basis for optimal design of spring clutch can be provided.