固体颗粒对射流偏转板伺服阀前置级冲蚀磨损的影响  

Effect of solid particles on erosion wear of prestage of jet deflector servo valve

作　　者：冀宏[1,2] 张硕文[1,2] 刘新强 陈晓明[1,2] 朱奕[1,2] JI Hong;ZHANG Shuo-wen;LIU Xin-qiang;CHEN Xiao-ming;ZHU Yi(College of Energy and Power Engineering,Lanzhou Univ. of Tech.,Lanzhou 730050,China;Hydraulic and Pneumatic Engineering Technology Research Center of Gansu Province,Lanzhou Univ. of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省液压气动工程技术研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2018年第6期44-48,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51575254)

摘　　要：针对射流偏转板伺服阀油液中的颗粒在高速射流时对其前置级产生冲蚀磨损的问题,将计算流体动力学和冲蚀磨损理论相结合,对射流偏转板伺服阀前置级进行了数值计算.模拟前置级油液的流动及固体颗粒的运动轨迹,计算了不同直径颗粒的最大运动速度及对前置级冲蚀磨损率的影响,分析了不同偏转板位移、V形导流窗口夹角以及不同偏转板厚度与前置级冲蚀磨损率的关系.结果表明:固体颗粒主要对劈尖冲击发生冲蚀磨损,油液中固体颗粒的直径越大其运动速度越小,但较大直径颗粒对前置级的冲蚀磨损较大;偏转板位移、V形导流窗口夹角以及偏转板厚度增大时前置级冲蚀磨损率减小.Aimed at the problem of erosion wear of the prestage of jet deflector servo valve caused by particles in high-speed jet flow of oil,the computational fluid dynamics combined with the erosion theory was used to conduct the numeric computation of the flow field in prestage of jet deflector servo valve.The oil flow and the tracks of solid particles in the prestage were simulated,the maximum velocity of particles with different sizes and their effect on the erosion wear rate of the prestage were calculated and the relationship of prestage erosion wear rate to the deflector displacement,included angle of V-shaped groove,and deflector thickness was analyzed.The result showed that the impact of solid particles on the wedge would be the main origin of erosion,the greater the diameter of solid particles in oil was,the less their motion velocity would be.But larger particle diameter would have higher erosion wear rate of the prestage.The prestage erosion wear rate would decrease when the deflector displacement,included angle of V-shaped flow guide groove,and deflector thickness were increased.

关 键 词：射流偏转板伺服阀 前置级 颗粒速度 冲蚀磨损 

分 类 号：TH137[机械工程—机械制造及自动化]