液压与气动2025，Vol.49Issue(4)：119-126,8.DOI:10.11832/j.issn.1000-4858.2025.04.014
发动机喷口喉道面积控制异常故障分析与改进设计
Fault Analysis and Improvement Design of Nozzle Throat Area Abnormal Control of Engine
夏鹏 1李鹏伟 1王松1
作者信息
- 1. 航空工业庆安集团有限公司,陕西 西安 710077
- 折叠
摘要
Abstract
The engine nozzle throat actuator cylinder regulates the nozzle throat area to control the engine's afterburner operation.To diagnose abnormal nozzle throat area control,we analyze the actuation system's working principles,establish a fault tree,and conduct bottom events.The malfunction is determined to result from the tilting of the piston coaxial sealing ring during pressure reversal,which caused a sudden surge in internal oil leakage between the rod and non-rod chambers of actuator cylinder.By adding oil-guiding grooves on the lateral surface of the piston coaxial sealing ring,and simulating pressure reversal conditions in rod and non-rod chambers of actuator cylinder,experimental validation is performed.Results demonstrate that the modified design significantly reduce internal leakage under pressure reversal,enhance the piston seal integrity,and resolve the nozzle throat area control anomaly.This improvement provides critical guidance for optimizing similar products and developing new-generation actuators.关键词
喷口喉道面积/作动筒/控制异常/泄漏Key words
nozzle throat area/actuator cylinder/control fault/leakage分类
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夏鹏,李鹏伟,王松..发动机喷口喉道面积控制异常故障分析与改进设计[J].液压与气动,2025,49(4):119-126,8.
