DN100梭式止回阀的数值模拟与结构优化  

Structure Optimization and Numerical Simulation of DN100 Shuttle-type Check Valve

作　　者：张健平[1] 赵周能[2] 李良超[1] 曾祥炜[1] 

机构地区：[1]西南科技大学制造过程测试技术教育部重点实验室,四川绵阳621010 [2]西南科技大学环境与资源学院,四川绵阳621010

出　　处：《机床与液压》2016年第3期174-178,191,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金资金项目(51308480)

摘　　要：为了满足潜艇核动力一回路的技术要求，针对原梭式止回阀阀体A、B两部分体积突变，产生了较大的压力梯度，易引起梭式止回阀的振动，不利于阀的稳定运行，产生较大的水锤现象和流阻等的缺点，利用FLUENT软件进行数值模拟分析，对阀体进行了优化设计。分析比较了优化前后的宏观速度、静压力和流阻力系数。结果表明：优化后的流道线型的曲率增大，型线过渡连续光滑，整个流动过程流速稳定，增大了止回阀的流通能力，漩涡强度减小；阀芯受力均匀，流体对阀芯的水击力较小，流动阻力减小；在阀门开度为5％～20％之间，梭式止回阀优化后的流阻系数相对降低量均大于60％，有效提高了防水锤特性。In order to satisfy the technical requirements of the primary circuit of submarine nuclear power,aimed at the disadvantages of the original shuttle-type check valve having large pressure gradient increasing,frequent vibration of the shuttle-type check valve,unstable operation of the valve,larger water hammer and flow resistance caused by its volume mutation of A and B two parts,its valve body was optimally designed through numercial simulation analysis by using FLUENT software. Its macroscopic velocity,static pressure and flow resistance coefficient were analyzed with comparing before and after optimization. The results show that the flow lines curvature of the optimized shuttle-type check valve is increased,and lines transition is more smooth and continuous. The overall flow process is stable in velocity,followed with increasing of flow capacity of the valve and decreasing of vortex strength,uniformly forcing of the valve core,and decreasing of water hammer on the valve core and flow resistance. Its relatively lowering amount of flow resistance coefficient is more than 60% in the opening of the valve between 5% and 20%. Consequently,the anti-water hammer characteristics of the valve are obviously improved.

关 键 词：梭式止回阀 数值模拟 结构优化 防水锤 

分 类 号：TH137.52[机械工程—机械制造及自动化] TQ027.12[化学工程]