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对于中国改进型三环路压水堆(CPR1000)机组余热排出泵电机冷却剂丧失事故(LOCA)环境鉴定试验中,实现对试验装置的热冲击和电机带载稳定运行是关键技术。利用压力为1 MPa大流量饱和蒸汽源实现热冲击阶段蒸汽临界流动,并通过设计使得热冲击在12 s内完成。采用水力测功机作为电机负载。水力测功机安装在LOCA试验容器外,通过中间轴与LOCA试验容器内的电机连接。为减少传动系统振动,将中间轴固定在LOCA试验容器壁面,并采用大挠度联轴器。在试验中电机平稳运行,满足试验要求。
It is the key technology to realize the thermal shock to the test device and the stable operation of the motor in LOCA environment qualification test for the residual heat removal pump motor coolant loss accident of China’s improved CPR1000 (CPR1000) unit. The critical flow of steam at the thermal shock stage was achieved by using a large saturated steam source with a pressure of 1 MPa, and the thermal shock was completed within 12 s through the design. Hydraulic dynamometer as a motor load. The hydro dynamometer is installed outside the LOCA test vessel and connected to the motor in the LOCA test vessel via the intermediate shaft. To reduce driveline vibrations, fix the countershaft to the LOCA test vessel wall and use a large deflection coupling. In the experiment, the motor runs smoothly to meet the test requirements.