Optimization design of parameters of the stacked compound planetary gear train for helicopter main gearboxes
BAI Lianghe
ZHU Rupeng
Abstract：[Objective]By using the stacked compound planetary gear train,a more compact gear reducer can be obtained,and the radial size and mass of the reducer can be reduced.[Methods]A mathematical model for parameter optimization design of a stacked compound planetary gear train with 5 planetary gears per layer was established,and the parameter optimization analysis was carried out on the background of a certain type helicopter main gearbox NGW planetary gear train.The sequential quadratic programming method was used to optimize the parameters of the gear train.[Results]When the minimum radial size of the gear train is taken as the objective function,the radial size is reduced by 22.5%,and the corresponding volume by 11.7%.When the minimum volume of the gear train is taken as the objective function,the radial dimension is reduced by 11.5%,and the corresponding volume by 23.2%.When the minimum radial size and volume of the gear train are the double objective functions,the radial size and volume of the gear train are reduced by 16%and 21.5%respectively,by the linear weighting method,which is more significant than the single objective optimization.
Keywords：Planetary gear trainStacked compound planetary gearSequential quadratic programming method
Publication Date：2025-11-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 114-120 )