摘要
为探究航空发动机滑油系统回油泵入口含气对其工作特性的影响,通过测量旋板式滑油泵不同入口含气率条件下振动信号,获得入口含气率的变化对旋板泵振动特性影响规律,并基于完全集成经验模态分解方法对振动信号进行处理和分析。研究结果表明:入口含气率的增加会减弱旋板泵的振动强度,水平与垂直方向振动强度明显高于轴向方向;前轴承座水平方向在低含气率时的振动主要由旋板泵运行时产生的压力脉动诱发,高含气率时振动的主导因素为机械因素;振动加速度信号的样本熵值随着入口含气率增大而下降,呈现良好的规律性,可用于旋板泵入口体积含气率预测以及故障诊断。
To investigate the effect of inlet gas content of the return pump in the aviation engine lubricating oil system on its working characteristics,the vibration signals of the rotary vane oil pump under different inlet gas fraction conditions were measured to obtain the influence of changes in inlet gas fraction on the vibration characteristics of the rotary vane pump.The vibration signals were processed and analyzed based on the Complete Ensemble Empirical Mode Decomposition(CEEMD)method.The results indicate that an increase in inlet gas fraction will weaken the vibration intensity of the rotary vane pump,and the horizontal and vertical vibration intensities are significantly higher than that in the axial direction.The horizontal vibration of the front bearing seat at low gas fraction is mainly induced by pressure pulsation during the operation of the rotary vane pump,and the dominant factor of vibration at high gas fraction is mechanical factors.The sample entropy value of the vibration acceleration signal decreases with the increase of the inlet gas fraction,showing a good regularity,and can be used for predicting the inlet gas volume fraction of the rotary vane pump and fault diagnosis.
作者
袁佳琦
叶凯杰
王怡锦
贺登辉
阳丽娜
曹明
白博峰
YUAN Jiaqi;YE Kaijie;WANG Yijin;HE Denghui;YANG Lina;CAO Ming;BAI Bofeng(State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China,Xi'an University of technology,Xi'an 710048,China;Department of Power Engineering,Institute of Water Resources and Hydro-electric Engineering,Xi'an University of technology,Xi'an 710048,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China;Shanghai Center of Research for Commercial Aircraft Engine Engineering Techniques,Shanghai 200241,China)
出处
《工程热物理学报》
北大核心
2025年第6期1898-1905,共8页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.52376031)。
关键词
旋板泵
气液两相流
振动
时频特性
CEEMD
样本熵
rotary vane pump
gas-liquid two-phase flow
vibration
time and frequency characteristics
CEEMD
sample entropy
