Research on meshing performance of high-order segmented topology modification in face gear pair

HE Qinyi; GUO Hui; RUAN Yuhang; ZHOU Zhenyu; LIU Li; HOU Zhihui; MEI Xiangqian

doi:10.16579/j.issn.1001.9669.2026.01.002

Abstract：[Objective]In order to enhance the load-bearing performance of face gear transmission and reduce its sensitivity to installation misalignment,a high-order segmented topological modification method based on a predefined contact path was proposed.[Methods]Firstly,2nd-order and 4th-order segmented modification functions were designed along the predefined contact path of the pinion and the instantaneous contact line direction,respectively.Based on the surface superposition method,the equation of the modified tooth surface was established.Subsequently,the tooth contact analysis(TCA)equation incorporating installation errors was derived.The influence of parameters such as predefined contact path angle,modification length,modification curve order,and maximum modification amount on the contact characteristics of face gear pair under different installation error conditions was investigated.Finally,a comparative analysis of the load-bearing contact characteristics of the face gear pair under different modification functions and modification amounts was conducted using the finite element method.[Results]The calculation results show that compared to 2nd-order modification,the 4th-order modification method reduces the contact stresses of the tooth surface and the error amplitude of load-bearing transmission.Furthermore,the contact trace extends from the root of the inner diameter tooth of the face gear to the tip of the outer diameter tooth.The high-order segmented modification method can reduce the sensitivity of the face gear pair to installation errors,optimize the load distribution of the tooth surface,and enhance meshing performance.