大型容器单轴双销铰链式大门机构设计与分析

Design and analysis of single-axis-double-pin hinged door for large-scale container

大型卧式容器的铰链式大门机构在装配和长期使用过程中由于下沉变形会导致大门关不严,影响密封性能.针对某在建的大型真空羽流试验舱直径Φ5.5 m的大门机构,首次提出了一种新颖的单轴双销铰链式大门机构方案,并对该机构的转动机构、限转装置和大门法兰底部的弹性支撑装置进行了全新的设计和分析,并通过有限元分析对该大门机构的强度进行了校核.有限元分析结果表明,大门合位移变形主要由大门重力引起的y方向位移贡献;在大门法兰底部施加弹性支撑时,铰链机构与大门法兰连接处的两个应力集中范围缩小、量值降低,并能保证大门合位移小于10mm.该大门机构的强度和刚度满足设计要求,对同尺寸的大门设计有重要借鉴意义.

The hinged door of the large-scale,horizontal container is usually deformed and distorted during the process of assembly and long-term usage,which can prevent the door from closing tightly and thus affect the sealing performance.A novel single-axis-double-pin hinged door was developed for a 5.5-meter-diameter,large-scale chamber,which was under construction for the plume experiment in vacuum.The design and analysis was conducted for the rotating mechanism,the restrictive switch device,as well as the elastic support unit at the bottom of the flange.The finite element method（FEM） was finally adopted to check the structural requirements.The results shows that the y-direction displacement,caused by the gravity,is the main factor of the combined displacement of the door.At the junction of the hinge and the flange,the range of the concentrated stress will shrinks,and the value of stress will decline,if a elastic support force is exerted at the bottom of the flange,which also ensures the combined displacement of the door less than 10 mm.The strength and stiffness requirements are satisfied for the single-axis-double-pin hinged door.This work will provide insight for the future design of the similar scale hinged door.