## Journal of Central South University

 第51卷    第1期    总第305期    2020年1月

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(四川大学 机械工程学院，四川 成都，610065)

Contact mechanics of two-tooth-difference oscillating-disc movable teeth transmission

School of Mechanical Engineering, Sichuan University, Chengdu 610065, China

Abstract:For the two-tooth-difference oscillating-disc movable teeth transmission system, it is easy to produce local crush deformation or fatigue wear under the working conditions of high speed and heavy load. According to the symmetry of the two-tooth-difference movable teeth transmission, the model of the two-tooth-difference oscillating-disc movable teeth transmission system was simplified, and the equivalent stress of each part near the contact point was calculated by the finite element analysis method. The phase of the movable tooth reflecting the dynamic process of the transmission, as well as the influence of the parameters of the movable tooth amplitude, the movable tooth radius and the groove curvature radius coefficient on the contact stress were studied. The classical theory of contact mechanics was used to study the distribution of different types of stress on the surface of the contact point. And based on the static strength check, the system was analyzed for its fatigue, contact fatigue life and the danger area of its pessible fatigue failure. The results show that the stress of each part is concentrated in the tiny area near the contact point, and the distribution state is in line with the expectations. It is a typical contact problem, and the rationality of differential meshing is verified. The increase of amplitude, the increase of the radius of the movable tooth, and the decrease of the radius of curvature of the groove all lead to the decrease of the maximum contact stress, and vice versa.

Key words: oscillating-disc movable teeth transmission; two-tooth-difference; contact mechanics; finite element; phase

 中南大学学报（自然科学版） ISSN 1672-7207 CN 43-1426/NZDXZAC 中南大学学报（英文版） ISSN 2095-2899 CN 43-1516/TBJCSTFT