大型真空容器的漏率控制与密封设计
陆艳君1,石教澜2,杨汉斌2,陆长胜3,岳向吉1,巴德纯1
(1. 东北大学机械工程与自动化学院 沈阳 110819;2. 武汉一冶钢结构有限责任公司 武汉430081;3. 武汉科技大学机械自动化学院 武汉 430081)
Leak rate control and sealing design of large scale vacuum vessels
Yanjun Lu1, Jiaolan Shi2, Hanbin Yang2, Changsheng Lu3, Xiangji Yue1, Dechun Ba1
(1. Northeastern University School of Mechanical Engineering and Automation Shenyang 110819;2. Wuhan Yiye Steel Structure Co.,LTD Wuhan 430081;3. Wuhan University of Science and Technology School of Machinery and Automation Wuhan 430081)
摘 要:随着科技进步,真空装备向大型化,高真空的方向发展。本文针对大型真空容器的检漏和密封设计进行了分析。当容器容积在2000m3量级时,氦质谱检漏仪接到前级真空侧理论上能够实现反应和清除时间约10s,检漏灵敏度约1×10-9Pa m3/s的总装检漏。考虑到实际实施上的不确定性和补漏困难的问题,通过密封和检漏设计,提高建造过程中的检漏水平和质量更为重要。文中对焊缝检漏、大型真空法兰的密封及检漏结构、大型真空阀门的使用等进行了分析。
关键词:大型真空容器;密封;检漏;检漏灵敏度;检漏时间
Abstract: With the advancement of science and technology, vacuum equipment development moves toward large scale and high vacuum. This paper analyzes the leak detection and sealing design of large scale vacuum vessels. When the volume of the vessel is ~2000m3, mounted at the side of the fore stage vacuum, theoretically, helium mass spectrometric leak detector could accomplish an overall leak detection having response and clear time of ~10s and leak detection sensitivity of ~1×10-9Pa m3/s. In consideration of the uncertainty in the practical application and the difficulty of leak repairing, it is more important to enhance the level of leak detection and the construction quality during the construction process by means of sealing and leak detection design. The leak detection of welding seam, the sealing and leak detection structure of large scale vacuum flanges, the usage of large scale vacuum valves, etc. are analyzed.
Keywords: large scale vacuum vessels; sealing; leak detection; leak detection sensitivity; leak detection time
巴德纯:教授、博导,主要研究方向:真空科学与技术、分子动力学与表面过程,联系方式: dchba@mail.neu.edu.cn