【摘要】：為研究航空發(fā)動機矢量噴管作動器電磁閥在不通油工況達到可耐受最高溫度的時間(超溫時間),采用集總參數(shù)法對電磁閥進行非穩(wěn)態(tài)熱分析。分別以整個作動器殼體和電磁閥部件為研究對象,考慮了電磁閥與環(huán)境的對流換熱與輻射換熱,建立了電磁閥溫度與時間的數(shù)學模型,研究了環(huán)境溫度T_(wai)、冷媒初始溫度T0兩個參數(shù)對電磁閥溫度隨時間變化關系的影響。結果表明:電磁閥溫度隨著環(huán)境溫度的升高而升高;超溫(T*℃)時間隨著環(huán)境溫度的升高而縮短。在環(huán)境溫度與加熱時間相同的條件下,電磁閥部件的溫度遠高于殼體的整體溫度。在T_(wai)為250℃的不通油工況下,當T_0為70℃時,電磁閥部件的超溫時間為17 min,電磁閥殼體的超溫時間為59分鐘,當T_0為93.76℃時,電磁閥部件的超溫時間為15 min,電磁閥殼體的超溫時間為50 min。
[Abstract]:In order to study the time (overtemperature time) when the electromagnetic valve of vector nozzle actuator of aero-engine can reach the maximum temperature (overtemperature time) under the condition of oil failure, the lumped parameter method is used to analyze the unsteady state of the solenoid valve. Taking the whole actuator shell and solenoid valve parts as research objects, the convection heat transfer and radiation heat transfer between solenoid valve and environment are considered, the mathematical model of solenoid valve temperature and time is established, and the ambient temperature T _ (wai), is studied. The influence of two parameters of refrigerant initial temperature T _ 0 on the variation of solenoid valve temperature with time. The results show that the temperature of solenoid valve increases with the increase of ambient temperature, and the time of overheating (T * 鈩，

本文編號：2402497