摘要
根据齿轮驱动风扇构型的航空发动机试验时风扇驱动齿轮箱试验件各滑油喷嘴精确供油要求,在液压加载式功率流封闭齿轮试验台供油路上加装了一个可以多路变压力分油的分油装置,分油装置内腔设计多条油路支路,在支路上安装有节流元件,通过调节节流内孔孔径和长度控制节流元件压降,向试验齿轮箱各滑油喷嘴提供多路不同压力的滑油,使得试验齿轮箱滑油喷嘴流量和流速精确达到试验要求。采用Flowmaster软件对试验台滑油供油系统进行了一维稳态仿真分析,分析了节流元件内孔长度和孔径对试验齿轮箱滑油喷嘴流量和流速的影响作用。结果表明:节流内孔孔径对节流元件压降的影响远大于节流内孔长度对节流元件压降的影响,特别是当节流内孔孔径在1 mm至3 mm之间时,节流元件对滑油供油流路压力具有明显的调节作用。
According to the requirement of accurate oil feeding to each oil nozzle of the test gearbox for a fan drive gear system（ FDGS） testing which was used in Geared Turbofan Aircraft Engines,a multi-line variable-pressure oil-separation unit was designed in the oil supply flow of the gear test system,which is closed power and provided by hydraulic load.The inner cavity of oil separation unit contains a number of branches with throttling components.The pressure drop of each throttling component is controllable by adjusting the diameter and length of throttle holes.In this way,multi-line oil with different pressure is supplied to the oil nozzles,which ensure that the oil flow rate and velocity at the oil nozzles can precisely comply with test requirements.In order to study the effects of the throttle hole diameter and length on oil flow rate and velocity at the oil nozzles,a one-dimensional,steady-state simulation of oil supply line in the gear test system was calculated using Flowmaster.The results show that the throttle hole diameter has much significant impact on pressure drop rather than that of throttle hole length.Especially when the throttle hole diameter is adjusted between 1mm to 3mm,the throttling component exhibits an obvious regulating effect on the oil feeding pressure of the gear test system.
出处
《机械科学与技术》
CSCD
北大核心
2016年第5期815-820,共6页
Mechanical Science and Technology for Aerospace Engineering
