星型风扇驱动齿轮箱概念设计探讨

风扇驱动齿轮箱在齿轮传动涡扇发动机中发挥重要作用,为了支撑我国宽体客机发动机总体方案论证,进一步开展齿轮传动涡扇发动机的研制工作,以五路分流人字齿星型风扇驱动齿轮箱为研究对象开展概念设计。所设计的齿轮箱的主要结构特征为:太阳轮为浮动构件,通过花键传扭;行星轮采用齿轮/轴承一体化设计并选用调心滚子轴承;齿圈采用柔性支承,通过摩擦传扭。基于概念设计,本文总结并分析了后续研制过程中可能遇到的技术难点,包括传动效率、均载机构、支承与连接结构、齿面修形及系统动力学五个方面,为进一步开展风扇驱动齿轮箱的研制工作指出方向。

Discussion on the conceptual design of fan drive gear system with star gears

In order to support the scheme demonstration of widebody jetliner engine and the further research on geared turbofan, this paper focus on the Fan Drive Gear System conceptual design. The FDGS of star gear configuration consists of five branches which are of herringbone gears. It also has several features as follow. The sun gear is floating while using spine to transmit torque. The planetary gears are of integrated gear/bearing using single row spherical roller bearing. The ring gears are flexible mounted using friction to transmit torque. With the conceptual design, several technical difficulties are analyzed for further research such as transmission efficiency, load sharing, mounting structures, tooth surface modification and system dynamic.