航空发动机空中起动失败故障分析与排除  

Analysis and Elimination of Engine Air Start Failure

作　　者：杜鑫 张立伟 滕德和 DU Xin;ZHANG Li-wei;TENG De-he(AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015

出　　处：《航空发动机》2023年第2期132-135,共4页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：针对某型发动机空中起动失败故障,阐述了发动机空中起动的时序与原理,通过对空中起动失败故障的现象分析,进行初步故障排查,建立空中起动失败故障树,根据故障树对可能导致发动机空中起动失败的因素进行逐一分析、检查及试验验证,确定主燃油泵调节器起动回油活门故障导致空中起动供油异常是发动机空中起动失败的原因。更换主燃油泵调节器后进行试飞验证。结果表明:发动机空中起动正常,空中起动参数正常,发动机空中起动能力满足该型产品的指标要求,发动机可以在规定时间内完成空中的再次起动,达到目标转速,发动机检飞通过。本次排故的思路与经验,可为后续某型产品的相关故障排除提供指导性帮助。Aiming at the air start failure of an aeroengine,the timing and principle of the engine air start are described.Through ana⁃lyzing the phenomenon of the engine air start failure,preliminary troubleshooting was carried out,and a fault tree for the engine air start failure was established.Based on the fault tree,the factors that may cause the engine air start failure were analyzed,inspected and tested one by one.It was found that the failure of the starting fuel spill valve of the main fuel pump regulator,which led to abnormal fuel supply during air start,was the reason for the air start failure.After replacing the main fuel pump regulator,verification was conducted in a flight test during which the engine's air start and starting relative parameters became normal,and the engine's air start ability met the specifica⁃tion of the product.The engine could complete the air restart within the specified time,reach the target rotational speed,and pass the en⁃gine flight inspection.The insight and experiences gained can serve as guidance for future troubleshooting of the product.

关 键 词：空中起动 故障树 主燃油泵调节器 起动回油活门 起动供油 航空发动机 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]