Abstract：A highpressure electric actuated gate valve with 25 MPa nominal pressure and 150 mm nominal diameter was designed for the needs of nuclear power industry, the design and calculation method of its main structure was introduced. The reasons for pressure loss production and the locations where the loss happened as the valve was in open. The FSI (fluidstructureinteraction) in the valve was simulated to show the influence of fluid pressure and velocity on the valve structure. The threedimensional structure model and water fluid domain of the valve were established, the CFX software was used to mesh the models and define the boundary conditions, then the pressure and velocity distribution in the valve were calculated, and the locations where the major pressure loss was generated was clarified. The fluid pressure was applied to the gate valve in Ansys to carry out an FSI analysis. The results showed that there are vortices around the valve seat, and the fluid static pressure and velocity near the wall are decreased significantly in rear of the seat, but the pressure drop and velocity magnitude are very small in the upper of the valve central line. The flow resistance coefficient of the valve is 0.093. The maximum deformation and stress of the valve are 19.4 μm, 70.8 MPa, which are located in the tip and side surface of the seat, respectively. These deformation and stress are within the allowable ranges.
刘建瑞, 李昌, 刘亮亮, 何小可, 向宏杰. 高压核电平板闸阀的设计与数值模拟[J]. 排灌机械工程学报, 2012, 30(5): 573-577.
LIU Jian-Rui, LI Chang, LIU Liang-Liang, HE Xiao-Ke, XIANG Hong-Jie. Design and numerical simulation of highpressure nuclear power gate valves. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(5): 573-577.
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