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...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。展开更多
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 refrige...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.展开更多
文摘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。
文摘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.
