摘要：内置低温泵是EAST装置中为防止杂质从偏虑器靶板附近进入等离子体核心的关键部件之一,可以为EAST长脉冲放电试验提供持续的排灰能力实现装置长脉冲放电。主要在EAST低温控制系统基础上,基于DCS结构设计内置低温泵的监控系统,从而实现低温泵阀箱冷却、运行、回温整个过程的自动监控。

摘要：传统氟利昂制冷剂对大气环境有害,破坏臭氧层,是全球气候变暖的主要原因。将空气作为制冷剂的好处是其对环境完全无害,且来源广泛极易获得。空气制冷在低温下性能表现良好,是一种很有前景的新型环保制冷方式。为研究空气制冷循环系统的特性,本文设计、搭建了一套空气制冷循环试验平台,经多次测试,取得了良好的实验结果:透平膨胀机最大转速达到37000r/min,等熵效率83%,系统最低温度达到-86℃,在-30℃时制冷功率达到了6.054k W,制冷效率达到0.504。空气制冷机在低温物流、速冻冷库等众多领域有着良好的应用前景。

摘要：结合工程实际,针对阴极保护工程设计和施工中存在的问题,就阴极保护方法的选择、带状镁阳极的作用、三层PE防腐层的优越性、绝缘装置的安装、阳极导线的处理、管道检测等方面总结了经验,提出了建议。

摘要：本文介绍了EAST低温系统与总控之间的信号报警及联锁保护在DeltaV DCS上的实现。首先介绍了联锁保护的系统要求和设计方案,然后详细说明了该联锁保护的控制逻辑,并提供了相应的软件组态,包括手动按钮监控界面的组态以及联锁模块的组态。

摘要：首先分析了氦制冷机和透平的工作流程,再从透平的众多参数中分析得出被控变量。以提高透平运行效率和制冷量为指导依据,设计了透平转速和入口阀的控制方案,并通过对比说明设计方案的优越性。最后考虑到透平的安全运行,设立了报警与保护信号,同时也对转速设定值进行了预处理,根据设计方案,采用模块化的编程思想设计了PLC的控制程序。

摘要：To make the large-scale helium cryogenic system of fusion device EAST （experimen- tal advanced super-conducting tokamak） run stably, as the core part, the helium turbine expander must meet the requirement of refrigeration capacity. However, previous designs were based on one dimension flow to determine the average fluid parameters and geometric parameters of impeller cross-sections, so that it could not describe real physical processes in the internal flow of the tur- bine expander. Therefore, based on the inverse proposition of streamline curvature method in the context of quasi-three-dimensional flows, the all-over-controlled vortex concept was adopted to design the impeller under specified condition. The wrap angle of the impeller blade and the whole flow distribution on the meridian plane were obtained; meanwhile the performance of the designed impeller was analyzed. Thus a new design method is proposed here for the inverse proposition of the helium turbine expander impeller.

摘要：A large-scale compressor set of a 2 kW helium cryoplant, as one of the subsystems of EAST （the experimental advanced superconducting tokamak）, is arranged in a two-stage seriesparallel structure. A fully automatic control system used to handle the compressors＇ on/off/ scheduling and the pressures＇ adjustment was developed. To reduce the long time lag and the uncertainty with the energy slide valves effectively, expert rules in combination with proportional- integral-derivative （PID） algorithms were applied nisms were built up to reinforce its stability and to the EAST operations and is operated stably. system, such as the big overshoot of pressure and Safety protection and status analysis mecha- robustness. The new system has been applied The problems in the previous semi-automatic complexity of the operations, were solved.

摘要：通过工艺流程分析,明确了500 W氦制冷机的控制流程及控制需求,设计实现了制冷机操作模式与过程参数调节控制回路。针对PLC控制系统的硬件和软件设计做了详细说明,并具体给出了500 W氦制冷机制冷模式自动控制的设计与实现。

摘要：为实现某导弹型号测试中触发行程延时开关的一致性和可靠性,设计了一种行程开关触发装置,分析了行程开关触发装置的机械结构,在ADAMS中建立了虚拟样机模型,并在ADAMS中进行动力学仿真。仿真分析了电磁铁吸合力、驱动力矩以及行程位移等参数,仿真结果验证了行程开关触发装置结构设计、实际应用的正确性、可靠性,为电磁铁型号选择、行程位移选择提供参考依据。

摘要：对高压氦气的除油过程进行理论分析,将过程分为捕集-聚结-排液3个部分,并对捕集过程进行理论计算,在不考虑二次夹带的情况下,一级、二级油气分离器对油滴的理论捕集效率应大于97%和99.6%。对油气分离器进行结构设计,并通过实验检验设计的油气分离器的除油效果。测试结果显示一级油气分离器除油效率达到97.625%,与理论捕集效率较为一致;二级油气分离器除油效率67.37%,对二级除油效率与理论捕集效率存在偏差进行了分析。综合除油效率达到99.25%,满足工程设计要求。