【作者】 孙桥；

【导师】 杨忠福；

【作者基本信息】 四川大学 ， 机械设计与理论， 2002， 硕士

【摘要】 本论文以原昆山市化工设备二厂设备室提出的生产实际课题为技术背景，针对化工行业最常用的设备之一——换热器，开发研制了参数化的管壳式换热器自动布管CAD系统。本文在对该类型换热器的功能、结构具体分析的基础上，对系统的总体设计、结构方案、布管算法、程序设计等诸多方面做了详细的讨论，定制开发了适宜该行业的CAD系统。本文所作的主要工作如下： 1．实现了管壳式换热器八种常用管程，四种标准布管形式(30°／45°／60°／90°)的参数化、自动化布管。系统具备两种自动布管功能：已知壳体内径布管和已知换热管根数布管。 2．完成了系统必要的设计、编辑和交互功能，包括：折流板的设计与放置，连续增添及删除换热管、拉杆等。 3．标示最大布管边界，自动标注尺寸，自动修改并输出布管参数及结果，包括：自动计算并输出每一管程的管根数、起始排数、终止排数，自动计算并输出每排热管根数与拉杆根数。 4．充分利用AutoCAD的开发性体系结构的特点和对图形数据库的操作功能，以Visual LISP和VBA为开发工具，实现不同功能模块的参数化设计及通信，提供友好直观的人机交互界面。 本系统基本按照《钢制管壳式换热器设计规定》中关于管壳式换热器布管设计的基本要求，进行参数设计与布局排管，具有浓郁的专业色彩，能够满足用户要求与设计规定，使长期以来换热器设计过程中设备与工艺之间的协调问题得到了一定程度的解决，从而缩短了设计周期并提高了设计质量。更多还原

【Abstract】 This paper introduces the auto-arranging of heat tubes for tube-sheet heat-exchangers,the most common pressure vessels used in chemical industry. The emphasis of this paper is put on the research and development of automatic parameterized layout of this kind of heat-exchangers,based on the structural and functional analysis done by us. Therefore,the thesis involves our basic design concept,model design,basic algorithm,programming skills and interface design. The completion of the following tasks leads to our final CAD system:1. Automatic arrangement of four standard patterns of pipelines (30?760?745 ?790 ?) and eight different flow orders, in accordance to two different design conditions:the total number of heat tubes or the inner diameter of the shell;2. The development of basic functional models for computing, designing,editing and intercommunicating, such as the layout algorithm, the design and placement of dead block,and adding and deleting of heat tubes.3. Automatic computation and modification of the dimension, the number of total heat tubes and rows, the body line of layout areas and other results involved.4. The programming of various functional models and their communication,coded with Visual LISP and VBA and based on the opening structure of AutoCAD and its entity database.According to the basic requirements of "The Regulation on the Design of Tube-sheet Heat-exchangers",this CAD system has been developed,which can produce the ideal layout the users need,shorten the designing period and better the designing quality.更多还原