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Design and power loss evaluation of a noncircular gear pair for an infinitely variable transmission
Mechanism and Machine Theory ( IF 5.2 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.mechmachtheory.2020.104137
Gang Li , Weidong Zhu

Abstract A novel noncircular gear design method is proposed in this work based on a modified high-order elliptical pitch curve for an infinitely variable transmission (IVT), and power loss evaluation of a noncircular gear pair is investigated. Modified high-order elliptical pitch curves of noncircular gears are developed by using kinematic equations of the IVT to eliminate cusps between every two neighboring lobes of pitch curves, and improve smoothness of pitch curves and manufacturability of the noncircular gear pair. A power loss evaluation method is developed for the noncircular gear pair by calculating sliding friction power loss of meshing tooth surfaces. The time-varying friction force of every contact position on meshing tooth surfaces of the noncircular gear pair is calculated by using their variable coefficients of friction and sliding velocities. The instantaneous sliding friction power loss of the noncircular gear pair is calculated based on time-varying friction forces and sliding velocities along contact paths of tooth profiles of the noncircular gear pair.

中文翻译:

无级变速器非圆齿轮副设计及功率损耗评估

摘要 本文基于改进的无级变速器(IVT)高阶椭圆节距曲线提出了一种新的非圆齿轮设计方法,并研究了非圆齿轮副的功率损耗评估。利用IVT的运动学方程得到修正的非圆齿轮高阶椭圆节曲线,消除节曲线每两个相邻瓣之间的尖点,提高节曲线的平滑度和非圆齿轮副的可制造性。通过计算啮合齿面的滑动摩擦功率损耗,开发了非圆齿轮副的功率损耗评估方法。非圆齿轮副的啮合齿面上每个接触位置的时变摩擦力是通过使用它们的可变摩擦系数和滑动速度来计算的。基于时变摩擦力和沿非圆齿轮副齿廓接触路径的滑动速度计算非圆齿轮副的瞬时滑动摩擦功率损失。
更新日期:2021-02-01
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