液压阀冲蚀磨损特性分析与结构探讨

以传统正顶杆结构的高水基平面先导阀为研究对象，将计算流体动力学理论(CFD)与冲蚀理论相结合，建立高水基液压阀流体湍流和冲蚀的数学模型.通过可视化模拟，分析了煤粒对高水基平面阀不同部位的冲蚀磨损分布.结果表明，平面阀的阀芯冲蚀磨损发生在节流口附近.此外，液压阀在开启过程中，由于阀芯的惯性使阀芯和顶杆间产生微动磨损.磨损的叠加，加剧了阀芯的磨损率，影响液压阀使用寿命.为此，提出了一种将正顶杆结构修改为侧顶杆结构可以减轻阀芯磨损的新方法.

Analyses of erosion wear characteristic and structure research on hydraulic valve

This study was concerned with the conventional center pole structure of high water-based pilot plain valve.Mathematic model of turbulent and erosion wear for high water-based hydraulic valve were established based on the combined technologies of computational fluid dynamics and erosion theory.By visual simulation,the erosion wear distribution that coal particles erode plain valve were predicted.The results show that the erosion wears of plain valve occur at the valve seat orifice near.Moreover,hydraulic valve in work,inertia causes fretting wear between valve core and pole.Wear rates of valve core were pricked up,owing to wear superposition.Finally,a novel means of reduce the valve core wear was suggested to sidepiece pole structure instead of center pole structure.