摆动活齿传动的热弹耦合变形

摘要

为了提高摆动活齿的传动性能,根据摆动活齿传动的啮合原理,分析了在摆动活齿传动中,活齿与内齿轮的接触传热过程;探讨了活齿与内齿轮啮合副产生的摩擦热流的计算方法;利用有限元分析方法建立了内齿轮的有限元分析模型;提出了摆动活齿传动轮齿本体温度分布、接触弹性变形和热弹耦合变形的分析计算方法.研究结果表明:内齿轮的最高温度出现在工作齿廓曲线的拐点附近,内齿轮的热变形增大了齿厚,对轮齿的弹性变形有一定的补偿作用,应用本文方法计算得到的内齿轮热弹变形符合实际工况,轮齿最大的热弹耦合变形量为0.045 mm.%To improve the transmission performance of swing movable teeth transmission,the contact heat transfer process between the movable teeth and internal gear was analyzed and the calculation method of the friction heat flux generated by the meshing pair was proposed according to the meshing principle of swing movable teeth transmission.Then,a finite element analysis model of the internal gear was established,based on which calculation methods of the body temperature field distribution,contact elastic deformation,and coupled thermo-elastic deformation of the internal gear during swing movable teeth transmission were put forward.The results of a case study show that the highest temperature in the internal gear appears near the inflection point of the internal gear profile curve;and the thermal deformation of the internal gear increases its tooth thickness,providing a certain compensation for the elastic deformation of the internal gear.In addition,the coupled thermo-elastic deformation of the internal gear obtained by the proposed method conforms with the actual working condition,and the maximum value is 0.045 mm.