超高压笼套式节流阀结构优化研究

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

摘要:

为解决鄂西页岩气开采超高压工况下现有节流阀易失效、调节精度不足等问题，本研究开展超高压笼套式节流阀结构优化研究。通过流体力学理论计算确定了节流孔的关键几何参数，借助ANSYS软件，采用RSM湍流模型对不同阀芯曲面形状与节流孔排列方式开展流场模拟分析。结果表明，半圆形曲面阀芯受到的压力最小、抗冲蚀性更好且便于加工；节流孔直线均匀排列为综合最优方案，其压力分布均匀，可有效抑制涡流产生，提升结构稳定性与调节精度，且加工便捷。优化后的节流阀结构在100 MPa超高压环境下表现出良好的节流效果与调节精度，对提高页岩气井口关键阀件的可靠性具有显著工程应用价值与推广前景。

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.