结冰风洞试验段上壁面自动顶盖装置设计与应用

为了解决模型进出试验段安装和拆卸问题，提出在结冰风洞试验段上顶面设计自动开闭顶盖，利用行车吊装模型进出的方法，研制了外形超12m2、重近5t、定位精度1mm的移动顶盖自动开闭装置。在结冰风洞试验段上壁板中心设计与移动顶盖同尺度的开孔，移动顶盖安装在提升机构的下端，通过四轴同步提升机构垂直升降，用于打开或关闭上壁板开孔；平移机构带动提升机构和移动顶盖，沿试验段上框架顶部龙门结构的两侧支撑轨梁的滑轨水平移动，使移动顶盖从风洞上壁面中心移动到过渡扩散段顶部；研制了升降、平移两轴伺服控制系统，实现了大载荷移动顶盖自动升降和平移控制，解决了移动顶盖结构设计、大载荷四轴同步提升时丝杠间相互别劲、高精度定位控制等问题。系统达到设计指标，已经应用到结冰风洞试验中，提高了试验模型更换效率。

Design and application of the automatic removable upper test section wall in icing wind tuunel

In order to solve the problem of installation and disassembly of the model in and out of the test section ,the design of automatic opening and closing removable section wall in the top face icing tunnel test section was put forward, an automatic opening and closing device of mobile with shape over 12m2,weight of nearly 5t and positioning accuracy of 1mm was developed by the crane hoisting model in and out of the test section. At the top in the center of the icing wind tunnel on the chamber wall design and mobile roof openings with scale,mobile head installed on the lower end of the hoisting mechanism,through the four vertical elevating axis synchronous hosting mechanism,used to open or close the hole on the wall:translational mechanism in promoting mechanism and moving head,along the test section on both sides of the frame at the top of gantry structure support rail with slide horizontally,moving a cover from the wind tuunel wall center moved to the transitiondiffusion section at the top;two-axis servo control system of lifting and translating was developed,which realized the automatic lifting and leveling control of moving top cover under large load,and solved the problems of structural design of moving top cover,mutual difference between leadscrews when lifting with large load and 4-axis synchronously,and high-precision positioning system.The system meets the design target and has been applied to the icing wind tunnel test to improve the efficiency of model replacement.