CFETR CS模型线圈低温测试平台的真空室及传输线的结构设计与分析
发布时间：2019-01-30 14:57
【摘要】：聚变能因清洁、安全、原料储量丰富等特点成为解决人类能源问题的一条重要途径。迄今为止,世界上最大可控核聚变试验反应堆—ITER,由7个国家/地区共同组建。中国作为参与方之一,在吸收和消化ITER关键制造技术的同时,也在开展自己的聚变实验堆建设(CFETR)。中心螺管线圈(Central Solenoid Coil)作为CFETR的关键部件之一,需满足最高达12T的磁场及每秒上T的磁场变化率的要求。因为我国没有中心螺管线圈制造经验,所以我们提出了开展CFETRCS模型线圈关键技术的研究工作,即采用与CFETR CS原型线圈相同结构的CICC绕制成的CS模型线圈,确保和CFETR CS线圈具有相同的科学目标和物理参数。在完成CFETRCS模型线圈的研制后,对模型线圈进行一系列的实验来评估模型线圈的性能。而测试实验需要建立一个大型低温测试平台,平台包括大型真空室及内置部件、低温系统、电源系统、电流引线、传输线等。针对低温测试平台的真空室和传输线,本文进行了较为详细的结构设计和强度分析研究工作。真空室是CFETRCS模型线圈低温测试平台的主要部件之一,主要作用是为测试线圈、冷屏等低温部件提供一个高真空、近似绝热的工作环境。真空室的结构设计需满足设计要求,且考虑到结构件一般设计准则和材料使用条件等,主要包括:壁厚值的理论计算和评估、连接法兰设计和强度评估以及开孔补强结构设计。根据真空室正常运行或发生故障时所遇到的状况,研究真空室所承受的载荷类型和大小(主要为重力载荷、压力载荷以及地震载荷),对真空室在不同载荷组成的工况下进行了详细的应力分析计算和强度评估。从分析结果来看,真空室的结构设计是合理的、安全可靠的。真空室主要内置部件为冷屏和结构支撑。针对设计要求,材料为304不锈钢。选用合适尺寸的冷屏和结构支撑在保证冷屏和结构支撑机械强度的同时,也要保证两者的漏热量在一定可接受范围。对冷屏和结构支撑在不同载荷组成的工况下进行了详细的应力分析计算和强度评估。且在"最苛刻"的工况下,冷屏和结构支撑的最大应力值均满足材料的强度要求,冷屏和结构支撑的结构设计符合要求。传输线作为CFETRCS模型线圈低温测试平台的重要组成部分,主要用于连接高温超导电流引线和测试线圈,实现测试线圈的励磁电流传输。传输线从材料选择、电绝缘设计、低温位移补偿设计、支撑设计以及外真空管和冷屏设计等几个方面进行结构设计。对传输线在不同载荷组成的工况下进行了详细的应力分析计算和强度评估,且在"最糟糕"的工况下,传输线的不锈钢铠甲和绝缘层的最大等效应力值均满足材料的应力许用值,传输线的结构设计也是合理的、安全可靠的。
[Abstract]:Fusion energy is an important way to solve the problem of human energy because of its clean, safe and abundant raw materials. To date, ITER, the world's largest controlled nuclear fusion test reactor, has been set up by seven countries. As a member of Fang Zhi, China, while absorbing and digesting the key manufacturing technologies of ITER, is also developing its own fusion experiment reactor to build (CFETR). As one of the key components of CFETR, the central coil (Central Solenoid Coil) needs to meet the requirements of the magnetic field up to 12T and the rate of change of the magnetic field on T per second. Because our country has no experience in the manufacture of central coils, we put forward the research work on the key technology of CFETRCS model coils, that is, CS model coils, which are made by CICC winding with the same structure as CFETR CS prototype coils. Ensure that CFETR CS coils have the same scientific objectives and physical parameters. After the development of the CFETRCS model coil, a series of experiments were carried out to evaluate the performance of the model coil. The test experiment needs to establish a large low temperature test platform, which includes large vacuum chamber and built-in components, low temperature system, power supply system, current lead, transmission line and so on. Aiming at the vacuum chamber and transmission line of the low temperature test platform, the structure design and strength analysis work are carried out in detail in this paper. The vacuum chamber is one of the main components of the CFETRCS model coil low temperature test platform. The main function of the chamber is to provide a high vacuum and near adiabatic working environment for the low temperature parts such as the test coil and the cold screen. The structural design of the vacuum chamber needs to meet the design requirements, and takes into account the general design criteria of structural parts and the application conditions of materials, including: the theoretical calculation and evaluation of wall thickness, the design and strength evaluation of connection flange, and the structural design of perforated reinforcement. According to the conditions encountered in the normal operation or failure of the vacuum chamber, the type and magnitude of the load (mainly gravity load, pressure load and seismic load) under the vacuum chamber are studied. The stress analysis and strength evaluation of the vacuum chamber under different loading conditions are carried out. From the analysis results, the structure design of vacuum chamber is reasonable, safe and reliable. The main components of vacuum chamber are cold screen and structure support. For design requirements, the material is 304 stainless steel. The suitable size of cold screen and structural support should be used to ensure the mechanical strength of cold screen and structural support, and to ensure that the heat leakage between them is in a certain acceptable range at the same time. The stress analysis and strength evaluation of cold screen and structural support under different load conditions are carried out. The maximum stress value of cold screen and structure support meets the strength requirement of material under the "most severe" working condition, and the structural design of cold screen and structure support meets the requirement. As an important part of CFETRCS model coil low temperature test platform, transmission line is mainly used to connect HTS current lead and test coil to realize excitation current transmission of test coil. The transmission lines are designed from several aspects, such as material selection, electrical insulation design, low-temperature displacement compensation design, support design, outer vacuum tube and cold screen design, etc. The stress analysis and strength evaluation of the transmission line under different load components are carried out in detail, and in the "worst" condition, The maximum equal-effect force values of the stainless steel armor and the insulating layer of the transmission line meet the allowable stress value of the material, and the structural design of the transmission line is also reasonable, safe and reliable.
【学位授予单位】：中国科学技术大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TL622
[Abstract]:Fusion energy is an important way to solve the problem of human energy because of its clean, safe and abundant raw materials. To date, ITER, the world's largest controlled nuclear fusion test reactor, has been set up by seven countries. As a member of Fang Zhi, China, while absorbing and digesting the key manufacturing technologies of ITER, is also developing its own fusion experiment reactor to build (CFETR). As one of the key components of CFETR, the central coil (Central Solenoid Coil) needs to meet the requirements of the magnetic field up to 12T and the rate of change of the magnetic field on T per second. Because our country has no experience in the manufacture of central coils, we put forward the research work on the key technology of CFETRCS model coils, that is, CS model coils, which are made by CICC winding with the same structure as CFETR CS prototype coils. Ensure that CFETR CS coils have the same scientific objectives and physical parameters. After the development of the CFETRCS model coil, a series of experiments were carried out to evaluate the performance of the model coil. The test experiment needs to establish a large low temperature test platform, which includes large vacuum chamber and built-in components, low temperature system, power supply system, current lead, transmission line and so on. Aiming at the vacuum chamber and transmission line of the low temperature test platform, the structure design and strength analysis work are carried out in detail in this paper. The vacuum chamber is one of the main components of the CFETRCS model coil low temperature test platform. The main function of the chamber is to provide a high vacuum and near adiabatic working environment for the low temperature parts such as the test coil and the cold screen. The structural design of the vacuum chamber needs to meet the design requirements, and takes into account the general design criteria of structural parts and the application conditions of materials, including: the theoretical calculation and evaluation of wall thickness, the design and strength evaluation of connection flange, and the structural design of perforated reinforcement. According to the conditions encountered in the normal operation or failure of the vacuum chamber, the type and magnitude of the load (mainly gravity load, pressure load and seismic load) under the vacuum chamber are studied. The stress analysis and strength evaluation of the vacuum chamber under different loading conditions are carried out. From the analysis results, the structure design of vacuum chamber is reasonable, safe and reliable. The main components of vacuum chamber are cold screen and structure support. For design requirements, the material is 304 stainless steel. The suitable size of cold screen and structural support should be used to ensure the mechanical strength of cold screen and structural support, and to ensure that the heat leakage between them is in a certain acceptable range at the same time. The stress analysis and strength evaluation of cold screen and structural support under different load conditions are carried out. The maximum stress value of cold screen and structure support meets the strength requirement of material under the "most severe" working condition, and the structural design of cold screen and structure support meets the requirement. As an important part of CFETRCS model coil low temperature test platform, transmission line is mainly used to connect HTS current lead and test coil to realize excitation current transmission of test coil. The transmission lines are designed from several aspects, such as material selection, electrical insulation design, low-temperature displacement compensation design, support design, outer vacuum tube and cold screen design, etc. The stress analysis and strength evaluation of the transmission line under different load components are carried out in detail, and in the "worst" condition, The maximum equal-effect force values of the stainless steel armor and the insulating layer of the transmission line meet the allowable stress value of the material, and the structural design of the transmission line is also reasonable, safe and reliable.
【学位授予单位】：中国科学技术大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TL622
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