Research of Time-varying Mesh Characteristics of Cycloid Internal Gear Pair with High Contact Ratio Based on Finite Element Method

doi:10.3901/JME.2021.11.206

Abstract

Abstract: For the newly proposed cycloid internal gear pair with high contact ratio, there is neither applicable theory to design its structure nor proper method to analyze its performance. The key technologies and pretreatment methods of simulation analysis are presented on the basis of loaded contact finite element analysis principle. By Python programming, the secondary development of ABAQUS is carried out and the parametric modeling analysis, automatic operation process and fast convergence settings are realized. Then, the correctness and the effectiveness of the simulation analysis are verified by comparing the simulation results of a couple of gear meshing force and Hertzian contact stress for teeth with the analytical calculation values of those. After this, the influence law is analyzed, about how the engaging characteristic parameters are influenced by the following factors: the number of the gear teeth, the modulus of gear, the top height coefficient of the gear teeth, the friction coefficient and the about load. Then, the paper focuses on the area optimization of the modified tooth profile that is out of mesh near the nodes and on the time-varying meshing characteristics, including effects of the errors during processing and installation. This research is of important basis and reference for the structure design, performance prediction and error control of the gear pair. However, the gear pair studied here requires high precision and the error range should be controlled within micron level. Besides, the load-carrying capacity is limited by the contact strength of the tooth surface.

Key words: contact ratio, cycloid gear, time-varying mesh characteristics, finite element method, loaded contact analysis

CLC Number:

TH132

LI Hongxun, JIN Xiaohui, YE Peng, GUI Xincheng, HOU Weifeng. Research of Time-varying Mesh Characteristics of Cycloid Internal Gear Pair with High Contact Ratio Based on Finite Element Method[J]. Journal of Mechanical Engineering, 2021, 57(11): 206-219.

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