Coupled Thermo-Elastic Deformation of Swing Movable Teeth Transmission

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.