定向凝固炉真空密封设计.doc

摘要 真空设备一般除了要求具有高效率外还要求具有高可靠性，密封性能是影响真空设备可靠性的最重要因素之一。高梯度定向凝固设备通过一系列的相关部件来保证其真空环境，而真空及其密封性的好坏，对工艺控制，产品的质量都有着直接的影响。考虑密封性对真空定向凝固炉的重要影响，本文基于5Kg真空定向凝固炉的设计项目，主要完成以下几点设计内容： (1)分析研究真空密封技术各种密封形式、应用场合及各自优缺点。 (2)分析研究真空熔铸设备中密封结构的技术要求和特征参数。确定定向凝固设备的整体结构。 (3)针对高梯度定向凝固设备的法兰、炉门和电极三个关键部件的不同结构特征，并考虑密封材料、结构特点和机械加工精度的要求，分别对其并进行密封设计与研究。 关键词 真空设备 密封技术 定向凝固炉 法兰密封 炉门密封 电极密封 Abstract Vacuum devices typically require high efficiency in addition to things, require high reliability and sealing performance of the vacuum equipment reliability is one of the most important factor. High gradient directional solidification equipment through a series of related components to ensure a vacuum environment, and the vacuum seal is good or bad and, on the process control, product quality have a direct impact. Consider the directional solidification furnace of vacuum sealing the important influence of 5Kg Based on the design of the vacuum directional solidification furnace project, designed primarily to complete the following: (1) analysis of the vacuum seal technology of sealing forms, applications and their respective advantages and disadvantages . (2) analysis of sealed vacuum casting equipment technical requirements and features of the structure parameters. Directional solidification equipment to determine the overall structure. (3) high gradient directional solidification equipment for the flange, door, and the three key components of the different electrode structure, and consider the sealing material, structural characteristics and the requirements of precision machining, respectively, and sealed its Design and Research. keywords: Vacuum Equipment ,Sealing Technology, Directional solidification furnace, Flange Seal , Furnace Door seal , Electrode sealed  目 录 第一章 绪论………………………………………………………………………….1 1.1 前沿 1 1.2 真空设备及应用 1 1.3 真空密封技术进展及应用 2 1.4 本文背景及意义 5 1.4.1高梯度定向凝固设备 5 1.4.2密封特点及难点 6 1.4.3本文设计内容 7 第二章 高梯度定向凝固炉结构设计 ………………………………………………8 2.1定向凝固技术 8 2.2 高梯度定向凝固设备结构 9 2.3密封特点及难点 11 第三章 真空密封技术…………………………………