【摘要】 运用计算流体动力学理论,建立高压多路阀滑阀副液固两相流场和冲蚀的数学模型,对阀芯上开有微沟槽和均压槽的滑阀副内流场进行数值模拟,比较微沟槽和均压槽阀芯对泄漏量、卡紧力引起的轴向摩擦力、壁面摩擦力和壁面磨损率等摩擦性能的影响,将数值模拟结果与工程实际结果进行对比。结果表明,高压多路阀芯应用微沟槽表面织构技术后,其泄漏量、壁面摩擦力和磨损率均比均压槽降低,卡紧力引起的最大轴向摩擦力比均压槽稍大,微沟槽的摩擦性能优于均压槽;微沟槽表面织构技术可以有效提高高压多路阀的使用寿命;SST k-ω模型和DPM模型能有效地模拟滑阀副液固两相流的流动规律。更多还原

【Abstract】 Based on CFD theory,a mathematical model of liquid-solid two phase flow field and erosion for slide valve of high pressure multi-way valve were established. Through simulation on the flow field of the slide valve under the different valve spools with micro-groove and pressure groove respectively,the tribological performance of two valve spools were analyzed,Including leakage,axial friction caused by clamping force,wall friction and wear rate. The results of numerical simulation were compared with that of the engineering practice. The results show that the leakage,wall friction and wear rate of the valve spool used micro groove surface texture technology are reduced,and the maximum axial friction caused by clamping force is slightly greater,compared with the pressure groove. The tribological performance of micro-groove is better than that of pressure groove. Seen that the micro-groove surface texture technology can effectively improve the service life of high pressure multi-way valve. SST k-ω model and DPM model can effectively simulate the flowing law of liquid-solid two-phase flow of slide valve.更多还原