涡喷发动机整机振动限制值试验研究  

Study on Vibration Limit Value of Turbojet Engine

作　　者：陈光炯 陆瑶 侯森 廖伟清 

机构地区：[1]杭州华翊科技有限公司,浙江杭州310000 [2]浙江大学航空航天学院,浙江杭州310000

出　　处：《工业控制计算机》2023年第7期51-53,57,共4页Industrial Control Computer

摘　　要：整机振动限制值是航空发动机能够稳定运行的重要参数,在发动机振动监测中起着至关重要的作用。传统的方法一般采用振动位移、速度或加速度这三类参数之一作为振动限制,但单一的参数限制无法兼顾稳态和瞬态发动机振动监测。提出一种同时监测1阶振动加速度、瞬态和稳态振动速度有效值三种参数,综合对发动机整机振动进行限制的试验方法,达到同时监测发动机稳态和瞬态振动的目的。以某小型涡喷发动机(100 kgf级)为试验对象,首先根据涡喷发动机传力路线,确定布置加速度传感器的位置。其次,通过对37组成功试车试验中监测到的振动加速度信号进行分析,得到三组关键振动参数:1阶振动加速度最大值、瞬态速度最大值以及稳态速度最大值。然后,采用Epps-Pulley检验统计方法,发现三个振动参数均满足正态分布特点,进一步利用正态分布“3σ原则”,获得涡喷发动机整机振动的故障监测的限制判据。最后,进行故障验证试验,结果表明提出的采用1阶振动加速度最大值、瞬态以及稳态下速度有效值的最大值的限制值判据,能有效预测整机振动故障,为小型涡喷发动机故障诊断试验提供参考依据。Vibration limit value is an important parameter for aircraft engine to run stably and plays a vital role in engine vibration monitoring.The traditional method generally uses one of the three parameters of vibration displacement,velocity or acceleration as vibration limit,but a single parameter limit cannot take into account both steady state and transient engine vibration monitoring.This paper creatively proposes a test method which can simultaneously monitor the first-order vibration acceleration,the effective values of transient and steady-state vibration velocity,and comprehensively limit the whole engine vibration,so as to achieve the purpose of simultaneously monitoring steady-state and transient vibration of the engine.Taking a small turbojet engine(class 100 kgf)as the test object,firstly,according to the turbojet force transmission route,the position of acceleration sensor is determined.Secondly,through the analysis of 37 groups of vibration acceleration signals detected in successful test,three groups of key vibration parameters are obtained:first-order vibration acceleration maximum,transient velocity maximum and steady-state velocity maximum.Finally,with PPS-Pulley test statistical method,it is found that all three vibration parameters meet normal distribution characteristics,and further use the normal distribution"3σprinciple"to obtain the limiting criteria for vibration fault monitoring of the whole turbojet.

关 键 词：涡喷发动机 振动信号处理 振动限制值 Epps-Pulley检验 

分 类 号：V235.11[航空宇航科学与技术—航空宇航推进理论与工程]