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工程科学与技术:2014,46(2):160-165
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新型梭式结构止回阀的数字仿真与结构优化
(1.四川大学 制造科学与工程学院;2.西南科技大学 制造过程测试技术教育部重点实验室;3.重庆市经贸中等专业学校)
Digital Simulation and Structure Optimization of New Shuttle-type Check Valve
(1.School of Manufacturing Sci. and Eng.,Sichuan Univ.;2.Key Lab. of Testing Technol. for Manufacturing Process of Ministry of Education,Southwest Univ. of Sci. and Technol.;3.Chongqing Economy and Trade Secondary Vocational School)
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投稿时间:2013-08-20    修订日期:2013-11-01
中文摘要: 根据第三代核电技术AP1000中非能动堆芯冷却系统对低压差开启止回阀的技术要求,针对现有旋启式止回阀的结构特点及其在反向压力高、流速快的工况下易发生撞击,引起阀瓣损坏和产生较大噪声的缺点,设计了一种新型梭式结构止回阀。介绍了该阀的基本结构和工作原理;分析了阀内部的湍流特点和基于Reynolds平均法的湍流时均控制方程,并运用计算流体动力学软件中的不可压缩流体流动的标准k-ε模型对梭式止回阀进行了数字仿真;提出了以压力损失最小为目标,对支承架开设泄流孔、减少阀体直径突变和在阀芯增加外弧面的结构优化方案,仿真结果表明优化后压力损失减小了21%。
Abstract:In order to overcome the shortcomings of the existing swing check valves that generate noise and are easy to be damaged by impact when they are subjected to high reverse pressure and high flow speed,a new shuttle-type check valve was designed.The basic structure and the work principle of this new check valve were introduced.Moreover,the characteristics of the turbulent flow in the check valve and the governing equations based on Reynolds average method were analyzed.The operation process of the shuttle-type check valve was then simulated using the standard k-ε model.Further more,through several ways including opening discharge hole on the bearing,reducing sudden change of the diameter of the valve body,and setting curved outer surface on the core,a structural optimization algorithm that aims to minimize the pressure drop was proposed.Numerical simulation results showed that the pressure drop in the optimized structure can be reduced by 21%.
文章编号:201300918     中图分类号:    文献标志码:
基金项目:国家重大科学仪器设备开发专项资助项目(2012YQ130226)
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向北平,殷国富,曾祥炜,李贺军.新型梭式结构止回阀的数字仿真与结构优化[J].工程科学与技术,2014,46(2):160-165.
Xiang Beiping,Yin Guofu,Zeng Xiangwei,Li Hejun.Digital Simulation and Structure Optimization of New Shuttle-type Check Valve[J].Advanced Engineering Sciences,2014,46(2):160-165.