航空兵器2025，Vol.32Issue(3)：108-114,7.DOI:10.12132/ISSN.1673-5048.2024.0212
某航空发动机异常停车故障分析及机理研究
Failure Analysis and Mechanism Research of Abnormal Stopping of a Certain Type of Aero-Engine
摘要
Abstract
Regarding the failure of a certain type of unmanned aerial vehicle(UAV)crashing due to abnormal en-gine shutdown during its flight,in order to determine the cause of the failure,studies encompassing data analysis,fault localization,mechanism analysis,and fault reproduction are carried out around the engine body,fuel system,and en-gine control system.The results indicated that because of the considerable difference in thermal expansion coefficients among materials,the voltage regulator diode in the engine ignition control box experienced fatigue cracking at the weld-ing part between the internal chip and the molybdenum column under the tensile stress of high-temperature epoxy resin,generating a gap.This resulted in the failure of the thyristor to open during the discharge process,preventing the high-voltage coil from generating voltage,causing ignition failure and resulting in a decrease in engine speed and subsequent shutdown.Finally,solutions are proposed,effectively addressing the practical problem and providing technical support for the performance testing of this type of UAV and the efficiency evaluation of the engine.关键词
航空发动机/故障分析/空中停车/控制盒/点火器Key words
aero-engine/failure analysis/in-flight shutdown/control box/ignitor分类
军事科技引用本文复制引用
苏宝全,周德元,何洁..某航空发动机异常停车故障分析及机理研究[J].航空兵器,2025,32(3):108-114,7.基金项目
省部级基金项目(1700010129) （1700010129）
