大功率电涡流制动氦透平膨胀机在EAST氦制冷机中的控制与调试

发布时间：2018-02-22 17:00

本文关键词： 氦透平膨胀机氦制冷机电涡流制动控制流程EAST托卡马克　出处：《低温工程》2016年04期 　论文类型：期刊论文

【摘要】：为保障系统的制冷量与可靠性,EAST托卡马克装置2k W氦制冷机采用了动压气体轴承电涡流制动氦透平膨胀机替代原有的油气混合轴承氦透平膨胀机。新电涡流制动氦透平膨胀机配合转子冷却回路运行,制动功率最大可达10 k W。氦透平膨胀机采用全动压径向气体轴承,而下止推轴承则引入静压气体用于增加止推轴承的承载力。目前,大功率电涡流制动氦透平膨胀机已完成在EAST氦制冷机中的安装与调试运行。介绍了电涡流制动氦透平膨胀机的测量与控制设计,在调试运行的基础上总结了氦透平膨胀机的启动与停机控制流程,并对其低温调试进行了详细分析。调试结果表明,电涡流制动的应用简化了氦透平膨胀机的启动、停机与操作流程,有助于EAST氦制冷机全自动控制的实现。
[Abstract]:In order to ensure the refrigerating capacity and reliability of the system, the 2kW helium refrigerator of East tokamak unit has replaced the original helium turbine expander with the eddy current brake with dynamic pressure gas bearing instead of the original helium turbine expander with oil and gas mixed bearing. New Eddy current Brake. Helium turbine expander operates with rotor cooling circuit, The maximum braking power can be up to 10 kW.The helium turbine expander uses full hydrodynamic radial gas bearings, while the down thrust bearings introduce static pressure gas to increase the bearing capacity of the thrust bearings. High power eddy current brake helium turbine expander has been installed and debugged in EAST helium refrigerator. The measurement and control design of eddy current brake helium turbine expander is introduced. On the basis of debugging and running, the starting and stopping control flow of helium turbine expander is summarized, and its low temperature debugging is analyzed in detail. The debugging results show that the application of eddy current brake simplifies the starting of helium turbine expander. Shutdown and operation flow are helpful to realize the automatic control of EAST helium refrigerator.
【作者单位】：中国科学院等离子体物理研究所;
【基金】：国家自然科学基金青年科学基金项目(11505237;51506209)资助
【分类号】：TL631.24;TB651

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