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.
[1]王孝天,杨源泉,贺友宗.不锈钢阀门的设计与制造[M].北京:原子能出版社,1987.[2]陆培文.阀门设计入门与精通[M].北京:机械工业出版社,2009.[3]常丽君.平行式双闸板闸阀的设计[J].设计与开发,2003(6):17-18.Chang Lijun. Design of parallel double plates gate valve[J]. Design & Development,2003(6):17-18.(in Chinese).[4]全国核能标准化技术委员会. EJT 102216—1996 压水堆核电厂NCh级阀门 技术条件[S]. 北京:中国核工业总公司,1996.[5]林砺宗,邢东仕,刘长虹,等.基于流固耦合方法的气压密封阀仿真分析[J].华东理工大学学报:自然科学版,2010,36(1):150-156.Lin Lizong,Xing Dongshi,Liu Changhong,et al. Simulation and analysis of flux in an airpressure sealing valve by fluidsolid interaction method[J]. Journal of East China University of Science and Technology: Natural Science Edition,2010,36(1):150-156.(in Chinese)[6]李兵,何正嘉,陈雪峰.ANSYS Workbench设计、仿真与优化[M].北京:清华大学出版社,2008.[7]张生昌,王宗槐,邓鸿英,等.基于ANSYS的偏心蠕动式转子泵转子强度分析[J].排灌机械工程学报,2010,28(2):132-135.Zhang Shengchang,Wang Zonghuai,Deng Hongying,et al. Rotor′s intensity analysis of eccentric and squirmy rotor pump based on ANSYS[J]. Journal of Drainage and Irrigation Machinery Engineering,2010,28(2):132-135.(in Chinese)[8]娄冬梅,赵飞.闸阀阀座外压分析[J].锅炉制造,2009(6):63-64.Lou Dongmei, Zhao Fei. Analyzing for outside pressure of wedge gate valve′s seat[J]. Boiler Manufacturing,2009(6):63-64.(in Chinese)[9]Hao Wu,Noureddine Benseddiq,Abdellatif Imad. Fracture toughness prediction of a valve body:Numerical analysis[J].Engineering Failure Analysis,2010,17(1):135-142.[10]Kang Dachang, Sun Hongyi, Chen Yu, et al. Research on the "shearextrusion" process to form largescale cutoff valve bodies[J].Journal of Materials Processing Technology, 2001,117(1/2):15-20.