考虑安装误差的GTF星型齿轮传动系统均载特性影响规律
Analysis of Load Sharing Characteristics of GTF Star Gear Transmission System Considering Installation Error
王海旭 1杨浩楠 2尤小梅2
作者信息
- 1. 中国航发沈阳发动机研究所,沈阳 110015;机械系统与振动全国重点实验室,上海 200240
- 2. 沈阳理工大学机械工程学院,沈阳 110159
- 折叠
摘要
作为下一代民用航空发动机主要发展方向之一的齿轮传动涡扇发动机(GTF),其引入了星型齿轮传动系统,为探究安装误差对星型齿轮传动系统均载特性的影响规律,基于商用软件建立GTF星型齿轮传动系统刚柔耦合动力学模型,以均载系数为考查指标进行仿真分析.分别考虑太阳轮、齿圈安装误差对系统的影响,并引入柔性支撑刚度改善载荷分配不均的问题,系统地分析其影响规律.结果表明:在健康工况条件下,各啮合副接触力分布均匀,系统的均载特性良好;随着安装误差的增大,均载系数呈增大趋势,内、外啮合副均载系数较健康工况下的最多增大了 21.1％和21.4％,系统的均载特性变差;通过添加柔性支撑并调整支撑刚度,内、外啮合副的均载系数减小到1.00952和1.00187,系统均载特性趋于合理,基本改善了载荷分配不均的问题.
Abstract
As one of the main development directions of the next generation civil aviation engines,the Geared Turbo Fan engine(GTF)introduces a star gear transmission system.In order to study the influence of installation error on load-sharing characteristics of GTF aeroengine star gear transmission system,a rigid-flexible coupling dynamics model of GTF star gear transmission system was established based on commercial software,and the load-sharing coefficient was used as the test index for simulation analysis.The impacts of installation errors of the sun gear and gear ring on the system were considered separately,and the flexible support stiffness was introduced to improve the problem of uneven load distribution,and their impact laws were systematically analyzed.The results show that under a healthy working condition,the contact force of each meshing pair is evenly distributed,and the load-sharing characteristic of the system is good.With the increase of the installation error,the load-sharing coefficient of the inner and outer meshing pairs increases by 21.1％and 21.4％,and the load-sharing characteristics of the system become worse.By adding the flexible support and adjusting the sup-port stiffness,the load-sharing coefficients of the inner and outer meshing pairs can be reduced to 1.00952 and 1.00187,the load-sharing characteristics of the system become more reasonable,and the problem of uneven load distribution is basically improved.
关键词
安装误差/齿轮传动涡扇发动机/星型齿轮传动系统/均载特性/接触力/柔性支撑Key words
Installation error/GTF/star gear system/load-sharing characteristics/contact force/flexible support引用本文复制引用
出版年
2024
NETL
NSTL
万方数据