摘要
针对机载燃油泵可靠性高、寿命长,实际工作环境复杂,而试验应力因素单一等特点,设计搭建了复杂应力条件下燃油泵退化试验平台,并对应力因素影响进行了分析。首先通过对燃油泵失效机理的分析,选取了影响轴承磨损的电应力和机械振动作为主要应力,开展其性能退化研究;然后基于以上选取的应力搭建了燃油泵退化试验平台和振动试验装置,并对压力传感器和流量传感器进行了选型,介绍了信号采集控制系统,设计了燃油泵夹持装置并对其动态性能进行了分析;最后基于正交试验思想设计了试验方案,并采用极差分析和方差分析2种方法对试验结果进行了分析。所提方法缩减了2/3的试验次数,节省了试验时间,并得出电压对燃油泵可靠性的影响更为显著,其置信度可达99%。
Aiming at the characteristics of high reliability,long service life,complex working environment,and single test stress factor of airborne fuel pump,a fuel pump degradation test platform under complex stress conditions was designed and built.And the influence of stress factors was analyzed.Firstly,through the analysis of the failure mechanism of the fuel pump,the electrical stress and mechanical vibration which affect bearing wear were selected as the main stress to study its performance degradation.Secondly,the degradation test platform and vibration test device of fuel pump were built based on the selected stress.And the pressure sensor and flow sensor were selected.The signal acquisition and control system was introduced,the fuel pump clamping device was designed and its dynamic performance was analyzed.Finally,the experimental scheme was designed based on the orthogonal experimental idea,and the test results were analyzed through range analysis and variance analysis.The number of tests was reduced by 2/3.It was concluded that voltage has more significant influence on the reliability of fuel pump and the confidence level was up to 99%.
作者
孙宏达
景博
焦晓璇
章余
王光临
Sun Hongda;Jing Bo;Jiao Xiaoxuan;Zhang Yu;Wang Guanglin(Aviation Engineering School,Air Force Engineering University,Xi'an 710038,China;Unit 95939 of PLA,Cangzhou 061000,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2021年第5期208-218,共11页
Chinese Journal of Scientific Instrument
基金
“十三五”预研专用技术项目(3030507-2)资助。
关键词
机载燃油泵
复杂应力
退化试验
正交试验
极差分析
方差分析
airborne fuel pump
complex stress
degradation test
orthogonal test
range analysis
variance analysis
