某型齿轮箱试验台多路润滑系统流量仿真分析

Flow Simulation Analysis of Multi Channel Lubrication System of Certain Gear Box Test Bench

按照齿轮传动涡扇发动机中风扇驱动齿轮箱润滑系统对于滑油喷嘴的精确供油要求,在液压加载功率封闭齿轮试验台上设计有多路变压力分油装置。分油装置内腔包含多条油路支路,支路中设计有节流元件,利用对节流元件内孔长度与直径的调节可以控制节流元件的压降,进而向各滑油喷嘴提供不同压力的滑油,以达到精准供油的目的。使用Flowmaster软件对齿轮箱试验台油路进行热交换稳态流动模拟,分析结果表明,节流孔径对节流元件压降的影响远大于节流孔长对节流元件压降的影响,且节流孔径在Φ1 mm~Φ3 mm范围内时节流效果较明显。

According to the precise oil supply requirements of the fan-driven gearbox lubrication system of the geared turbofan engine for the oil nozzle,a multi-way variable pressure oil separation device is designed on the hydraulically loaded power closed gear test bench.The inner cavity of the oil separation device contains multiple oil circuit branches,and the branch circuits are designed with throttle elements.By adjusting the length and diameter of the inner hole of the throttle element,the pressure drop of the throttle element can be controlled,and then lubricating oil with different pressures is provided to each lubricating oil nozzle,so as to achieve the purpose of precise oil supply.Flowmaster software was used to conduct heat exchange steady-state flow simulation on the gear test bench oil circuit.The analysis results show that the influence of the throttle diameter on the pressure drop of the throttle element is much greater than the influence of the throttle length on the pressure drop of the throttle element,and the throttle effect is more obvious in the range ofφ1mm toφ3mm.