民用飞机舱门通风口机构的设计与研究

Design and Research on Vent Panel Mechanism in a Door of Civil Aircraft

通风口机构作为常见的增压预防措施,阻止飞机在舱门未完全关闭、上闩、上锁情况下增压到不安全水平,有效监控了舱门关闭状态,提升了飞机安全性。针对通风口机构常用的凸轮和四杆机构,结合成熟设计实例提出凸轮和四杆机构的设计要点,介绍有效通风面积计算方法,阐述通风口机构的设计原理。

Vent panel mechanism,as a common provision,prevents the pressurization of the airplane from reaching the unsafe level if any door subject to pressurization is not fully closed,latched,and locked,which monitors the closed state of door system effectively and raises the safe reliability of the airplane. Cam and four-bar linkage are most often applied in vent panel mechanism. Based on successful design case,design cruces and principle for cam,four-bar linkage and vent panel mechanism are given,and calculative method for effective vent area is introduced as well.