Dynamic characteristics analysis of double-point contact internal meshing gears with curve construction

LIANG Dong; WU Yukang; HU Hanbao; XU Xiangyang; HUA Chengli; HE Zeyin

doi:10.16578/j.issn.1004.2539.2025.10.001

Abstract：[Objective]To further explore the transmission performance of double-point contact internal meshing gears with curve construction,it is necessary to analyze the dynamic characteristics of gears which can provide a basis for the gears'design and test analysis.Taking double-point contact internal meshing gear with curve construction as the research object,dynamic characteristics and meshing laws were discussed.[Methods]Firstly,tooth surface equations of the new gear pair were derived by the spiral motion method based on the given tooth profile parameters and tooth profile form.A three-dimensional model of the double-point contact internal meshing gear with curve construction was established.Secondly,a virtual prototype model of the gear was established by Adams software.The normal contact force,radial force,axial force and circumferential force of the dou-ble-point contact internal meshing gear with curve construction and the conventional involute internal meshing gear under the same parameter conditions were analyzed.The meshing characteristics and variation laws of the two types of gears were compre-hensively compared.Finally,the influence of friction coefficient and rotational speed on the normal contact force of the new gear was investigated.[Results]The results show that the dynamic performance of the double-point contact internal meshing gear with curve construction is better than that of the conventional involute internal meshing gear under the same parameter con-ditions,except for the fluctuation of radial force.In addition,the friction coefficient is positively correlated with the magnitude of the normal contact force and negatively correlated with its fluctuation,while the rotational speed is positively correlated with both the normal contact force and the fluctuation.