Load Sharing Behavior of Star Gearing Reducer for Geared Turbofan Engine  

作　　者：Shuai MO Yidu ZHANG Qiong WU Feiming WANG Shigeki MATSUMURA Haruo HOUJOH 

机构地区：[1]State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China [2]School of Mechanical Engineering & Automation, Beihang University, Beijing 100191, China [3]AVIC Shenyang Engine Design & Research Institute,Shenyang 100015, China [4]Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan

出　　处：《Chinese Journal of Mechanical Engineering》2017年第4期796-803,共8页中国机械工程学报（英文版）

基　　金：Supported by National Key Technology R&D Program(No.2014BAF08B01);Natural Science Foundation of Tianjin(Grant No.17JCQNJC04300)

摘　　要：Load sharing behavior is very important for power-split gearing system, star gearing reducer as a new type and special transmission system can be used in many industry fields. However, there is few literature regarding the key multiple-split load sharing issue in main gearbox used in new type geared turbofan engine. Further mechanism anal- ysis are made on load sharing behavior among star gears of star gearing reducer for geared turbofan engine. Compre- hensive meshing error analysis are conducted on eccentricity error, gear thickness error, base pitch error, assembly error, and bearing error of star gearing reducer respectively. Floating meshing error resulting from meshing clearance variation caused by the simultaneous floating of sun gear and annular gear are taken into account. A refined mathematical model for load sharing coefficient calculation is established in consideration of different meshing stiffness and support- ing stiffness for components. The regular curves of load sharing coefficient under the influence of interactions, single action and single variation of various component errors are obtained. The accurate sensitivity of load sharing coefficienttoward different errors is mastered. The load sharing coef- ficient of star gearing reducer is 1.033 and the maximum meshing force in gear tooth is about 3010 N. This paper provides scientific theory evidences for optimal parameter design and proper tolerance distribution in advanced devel- opment and manufacturing process, so as to achieve optimal effects in economy and technology.Load sharing behavior is very important for power-split gearing system, star gearing reducer as a new type and special transmission system can be used in many industry fields. However, there is few literature regarding the key multiple-split load sharing issue in main gearbox used in new type geared turbofan engine. Further mechanism anal- ysis are made on load sharing behavior among star gears of star gearing reducer for geared turbofan engine. Compre- hensive meshing error analysis are conducted on eccentricity error, gear thickness error, base pitch error, assembly error, and bearing error of star gearing reducer respectively. Floating meshing error resulting from meshing clearance variation caused by the simultaneous floating of sun gear and annular gear are taken into account. A refined mathematical model for load sharing coefficient calculation is established in consideration of different meshing stiffness and support- ing stiffness for components. The regular curves of load sharing coefficient under the influence of interactions, single action and single variation of various component errors are obtained. The accurate sensitivity of load sharing coefficienttoward different errors is mastered. The load sharing coef- ficient of star gearing reducer is 1.033 and the maximum meshing force in gear tooth is about 3010 N. This paper provides scientific theory evidences for optimal parameter design and proper tolerance distribution in advanced devel- opment and manufacturing process, so as to achieve optimal effects in economy and technology.

关 键 词：Geared turbofan engine GTF engineAero-turbofan engine Star gearing reducer Load sharing behavior 

分 类 号：TH132.46[机械工程—机械制造及自动化] TN915[电子电信—通信与信息系统]