三用阀阀芯微造型的动压润滑性能

Hydrodynamic Lubrication Performance of Valve Core Micro-texturing on Water Hydraulic Three-function Valve

以煤矿三用阀中的安全阀阀芯的密封面为研究对象,通过在阀芯表面开设微造型以改善其润滑及抗磨损性能。建立阀芯微造型的数学模型,采用基于N-S方程的计算流体力学方法对微造型区域进行流场分析。通过得到不同结构参数及速度参数下的阀芯表面压力分布曲线及阀芯承载力曲线,探究在阀芯表面开设微造型对改善其动压润滑性能的影响效果。分析结果表明:在水压三用阀阀芯表面开设的微造型能产生良好的动压润滑效果;动压润滑性能随壁面间隙的增大,先略有下降然后再逐渐增强;随微造型深度的加深,先提高而后再逐渐下降;而不断增大微造型半径及壁面移动速度均能使动压润滑性能不断提升。

We take the sealing surface of mine water hydraulic three-function valve core through setting up a micro-texturing on valve core surface for improving the lubrication and ance. We establish the mathematical model of valve core micro-texturing, and use comp as the research object, wear resistance perform- utational fluid dynamics method based on the Navier-Stokes equation to analyze the micro-texturing area flow field. By getting the pressure distribution curves on valve core surface and bearing capacity curves of valve core under different structure and speed parameters, we explore the effects of opening micro-texturing on the valve core surface to the improvement of the hydrodynamic lubrication performance. Results show that： the micro-texturing opening on the valve core surface of water hydraulic three-function valve can produce a good effect on hydrodynamic lubrication performance; the next along with the increase of wall clearance, hydrodynamic lubrication performance slightly declines and then gradually gets increased; and with the micro-texturing depth deepening, it first increases and then gradually declines; finally both increasing micro-texturing radius and wall movement speed can make the hydrodynamic lubrication perform- ance improved.