民机舱门新型提升助力机构研究

Research on a new type of lifting assist mechanism for civil aircraft cabin door

为满足适航要求并提高操作性能,民用飞机增压舱门、特别是应急出口类舱门的操作手柄力有严格的设计要求。提升助力机构是舱门上最常采用的提升运动辅助机构,可以有效调节舱门的操作手柄力。介绍了"弹簧"和"扭力杆"两种民用飞机半堵塞式舱门典型提升助力机构形式,分析了其工作原理。以某项目提升助力机构为例,分析了其在舱门提升运动过程中的功能,给出了舱门在提升过程中手柄力较大且全行程手柄力突变较剧烈的原因。基于上述应用问题,引入了一种新型舱门提升助力机构,该机构在舱门完全关闭状态下不提供助力,在提升初始阶段可以直接提供较大的驱动力,介绍了该机构的构型,分析了机构的机构原理及工作过程,为舱门提升助力机构设计和舱门其他机构设计提供了参考。

In order to meet the airworthiness requirements and improve the operation performance,there are strict design requirements for the operating handle force of the pressurized cabin door,especially the emergency exit doors.Lifting assist mechanism is the most commonly used lifting auxiliary mechanism on the cabin door,which can effectively adjust the operating handle force of the cabin door.This paper introduces two kinds of typical lifting assist mechanisms of semi-plug cabin door for civil aircraft:"spring"and"torsion bar",and analyzes the mechanism principle.Taking the lifting assist mechanism of a project as an example,this paper analyzes its function in the process of cabin lifting,and the main problems in its application.Based on the above application problems,a new type of lifting assist mechanism for sequence lifting cabin door is introduced,which does not provide assistance when the door is completely closed,and can directly provide larger driving force in the initial stage of lifting.This paper introduces the configuration of the mechanism,analyzes the mechanism principle and working process,and provides a reference for the design of the door lifting assist mechanism and other door mechanisms.