Research on structural optimization of ultra-high pressure cage type throttle valve

Abstract:

To address issues such as the susceptibility to failure and insufficient regulation accuracy of existing throttle valves under ultra-high pressure conditions in shale gas extraction in western Hubei， this study conducts structural optimization research on an ultra-high pressure cage-type throttle valve. The key geometric parameters of the throttle orifices were determined through theoretical fluid dynamics calculations. Utilizing ANSYS Fluent software and adopting the Reynolds Stress Model （RSM） for turbulence simulation， flow field simulations were performed to analyze different valve core surface profiles and throttle orifice arrangements. The results indicate that the semi-circular curved valve core exhibits the lowest pressure， superior erosion resistance， and ease of machining. Furthermore， the linear uniform arrangement of throttle orifices is identified as the comprehensive optimal scheme， offering uniform pressure distribution， effectively suppressing vortex generation， enhancing structural stability and regulation accuracy， and providing manufacturing convenience. The optimized throttle valve structure demonstrates excellent throttling performance and regulation accuracy under 100 MPa ultra-high pressure conditions， showing significant engineering application value and promising prospects for enhancing the reliability of key wellhead components in shale gas extraction.