基于流固耦合的阀芯旋转式高速开关阀结构优化

Structural Optimization of Rotary High-Speed On-Off Valve Based on Fluid-Structure Interaction

在阀芯高速旋转时,阀芯旋转式高速开关阀内部流场会对阀结构强度产生影响。针对此问题,利用Fluent对阀进行动态流场分析,将流场仿真结果作为压力载荷,通过Static Structural进行流固耦合分析,在此基础上,对阀芯旋转式高速开关阀的结构进行优化。结果表明:阀内部应力整体分布规律为:越靠近中心应力越大,越靠近边缘应力越小,阀芯中心圆柱与阀芯台肩的接触面为阀的危险区域;阀套窗口处油液流动速度变化梯度明显,对阀套产生显著压力冲击;通过对阀套窗口进行倒角处理、阀芯细化等优化,使得阀内部应力强度减弱,流体对阀的压力冲击显著降低。

The internal flow field of the rotary high-speed on-off valve will affect the strength of the valve structure when the spool rotates at high speed.Aiming at the problem,the dynamic flow field analysis of the valve was carried out by Fluent,and the flow field simulation results were used as pressure loads,and the fluid-structure interaction analysis was carried out through Static Structural,on this basis,the structure of the rotary high-speed on-off valve was optimized.The results show that the overall distribution law of the internal stress of the valve is that the closer to the center,the stress is greater,the closer to the edge the stress is smaller,and the contact surface between the central cylinder of the valve core and the shoulder of the valve core is the danger area of the valve.The gradient of oil flow velocity at the window of the valve sleeve is obvious,which produces a significant pressure impact on the valve sleeve.Through the optimization of the valve sleeve window chamfer treatment and the valve core refinement,the internal stress intensity of the valve is weakened,and the pressure impact of the fluid on the valve is significantly reduced.