大口径激光发射系统卷帘式窗口密封特性分析  

Analysis of sealing characteristics of rolling blinds window for large aperture laser emission system

作　　者：任天赐 邵帅[1] 孟令武 汪奎 Ren Tianci;Shao Shuai;Meng Lingwu;Wang Kui(Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2019年第5期77-84,共8页Infrared and Laser Engineering

基　　金：吉林省科技发展计划(Y731UC170)

摘　　要：基于600 mm口径的某激光发射系统,提出了一种卷帘覆盖压紧式密封方法,卷帘采用卷曲收放结构,通过电机驱动卷轴转动带动同步带运动,同时利用弹性拉紧机构拉紧卷帘,使卷帘在收放运动过程中一直保持紧贴密封平面来达到密封效果。通过理论分析与有限元建模仿真,对其密封特性进行了分析,得出密封平面的结构形式是影响密封性能的主要因素。通过分析比较,选取PVC作为卷帘材料。设计的结构为密封凸起平面形式,卷帘厚度为0.5 mm,结构边缘带有30°倒角。对其密封特性进行有限元仿真分析,得出卷帘中心挠度为6.269 mm。在设计指标所允许的的极限载荷下卷帘所受应力远小于材料拉伸强度,不会破坏。满足密封要求。Based on a laser emission system of aperture 600 mm, a rolling blinds sealing method was presented. For the rolling blinds, a curly replay structure was applied to drive the synchronous belt through the motor drive roll. At the same time, the rolling blinds was tightened by the elastic tightening mechanism to keep the blinds close to the seal plane to achieve the sealing effect. By theoretical analysis and numerical simulation of Finite Element Analysis, the sealing characteristics were studied. It can be concluded that the structure of the seal plane are the main factors affecting the sealing performance. By analysis and comparison, PVC is selected to be the material for rolling blinds. The designed structure is a sealed protuberance with a chamfering of 30° and thickness of rolling blinds is 0.5 mm. The Finite Element Analysis of the sealing characteristics shows that the center deflection of the rolling blinds is6.269 mm. Under the limit load allowed by the design requirements, the stress of the rolling blinds is far less than the tensile strength of the material and will not be destroyed. The designed window satisfies the sealing requirements.

关 键 词：激光光学 强激光 卷帘式密封 覆盖压紧 有限元分析 

分 类 号：TN243[电子电信—物理电子学]