Abstract
Abstract. The planetary gear system consists of several concentric single stage face gears symmetrically meshing with multiple cylindrical gears that as the core component of planetary multistage face gears transmission device (PMFGTD), which is the key to realizing shifting and principle innovation that able to flexibly extend the speed ratio region of single stage face gear. The speed ratio distribution mechanism is directly related to the feasibility of the design scheme. The stability, reliability and loading capacity of each power split branch affect the performance of the whole system directly. For the requirements of maximizing drive efficiency and optimizing drive performance under different conditions, this study analyzes the gear matching relationship and driving characteristics by using numerical calculation method basing on the PMFGTD structural characteristics, and calculates the corresponding transmission ratio value. According to the torque equilibrium equation, the torque relation and power ratio relation of each component are established, and then the power distribution relation between system components is calculated. The flow characteristics of system input power and each branch output power under the condition with or without meshing power loss are analyzed. The influence relationship model of power split coefficient on drive efficiency is established to calculate the corresponding rules, thus the dynamic characteristics of PMFGTD on power split under various working conditions are proved by experiments. The result provides reference for the transmission ratio distribution and structure design of planetary multistage face gears transmission.
Highlights
Multistage face gear shifting mechanism is a planetary gear system consisting of meshing multiple face gears with cylindrical gears (Hu et al, 2019)
The results reveal that the power directions in concentric face gear split-torque transmission system (CFGSTTS) are alterable, and the load sharing coefficients are affected obviously by structural parameters (Dong et al, 2019)
The numerical model established in this paper focuses on transmission ratio distribution conditions of each branch and drive efficiency with or without power loss, and other conditions are simplified
Summary
Multistage face gear shifting mechanism is a planetary gear system consisting of meshing multiple face gears with cylindrical gears (Hu et al, 2019). It is observed that the support stiffness of pinion and backlash have significant influences on the load sharing behaviours of the concentric torque-split face gear transmission (Zhao et al, 2018). The analytic results indicate the effects of the proposed star pinion geometry phase adjustments on dynamic load sharing behaviors of two version differential face gear trains are significant. These contributions would benefit to improve dynamic load sharing designs and engineering applications of differential face gear trains in the future (Li et al, 2016). Power split, analyze the relationship between power split characteristics and drive efficiency, obtain the power split rules, optimize transmission characteristics and design scheme of key components of planetary split
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