南京航空航天大学学报（英文版）2024，Vol.41Issue(6)：766-782,17.DOI:10.16356/j.1005-1120.2024.06.008
直升机中减速器金属颗粒可及性因素研究及结构优化
Research on Accessibility Factors of Metal Particles and Structural Optimization of Intermediate Gearbox in a Helicopter
摘要
Abstract
The intermediate gearbox of a helicopter operates under splash lubrication.If the bearing produces metal particles due to insufficient lubrication or wear,whether it can be adsorbed by the metal particles signal at the bottom of the gearbox and alarm directly affects the flight safety of the helicopter.Based on the CFD method,the factors affecting the accessibility of metal particles are analyzed by using the volume of fluid-discrete phase model(VOF-DPM)coupling model,the RNG k-ɛ turbulence model and the dynamic grid technology.Furthermore,the optimization research on the casing structure is conducted.Experimental results show that the accessibility of metal particles is optimal when the gear speed is 6 000 rad/min or the immersion depth is 24 mm.The density of metal particles exhibits a nonlinear relationship with their accessibility,and the particle size has a relatively small impact on their accessibility without an order of magnitude change.关键词
减速器/飞溅润滑/金属屑末/CFD/三相流Key words
intermediate gearbox/splash lubrication/metal particles/CFD/three-phase flow分类
机械制造引用本文复制引用
陆凤霞,王泓林,韦坤,冷晟..直升机中减速器金属颗粒可及性因素研究及结构优化[J].南京航空航天大学学报（英文版）,2024,41(6):766-782,17.基金项目
This study was supported by the Na-tional Natural Science Foundation of China(No.52075241),and the National Key Laboratory of Science and Technology on Helicopter Transmission(Nanjing University of Aeronau-tics and Astronautics)(Nos.HTL-A-22K04 and HTL-O-21G13). （No.52075241）
