液压伺服滑阀阀口小开度冲蚀特性  

Orifice Erosion Characteristic of Hydraulic Servo Spool Valve Under Small Opening

作　　者：刘新强[1,2] 刘飞 冀宏 王聪[1] 林广 LIU Xin-qiang;LIU Fei;JI Hong;WANG Cong;LIN Guang(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou,Zhejiang 310027)

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]浙江大学流体动力基础件与机电系统全国重点实验室,浙江杭州310027

出　　处：《液压与气动》2023年第12期55-60,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52005234);流体动力基础件与机电系统全国重点实验室开放基金(GZKF-202215)。

摘　　要：液压伺服滑阀易受油液中固体颗粒的冲蚀而发生性能退化。在工作边冲蚀微观形貌的测量与分析基础上,建立小开度阀口流域颗粒运动可视化模型,研究阀口颗粒运动轨迹,仿真分析工作边冲蚀率随液流方向的变化规律。结果表明:阀口冲蚀工作边上存在多处崩边性的微观缺口形貌,颗粒运动过程中与工作边的高速碰撞、刮擦等是阀口冲蚀的主要形式,迎流区的工作边冲蚀率均值和均方差比背流区分别高约1倍和0.8倍。Hydraulic servo spool valve was susceptible to performance degradation due to erosion by solid particles in oil.On the basis of measuring the micro-topography of the working edges,a particle movement visualization model of valve orifice under small opening was established.The particle movement trajectory of the valve orifice was studied and the variation law of the erosion rate of the working edges with the liquid flow direction was simulated and analyzed.The results showed that there were microscopic notch morphology with chipping on the working edge of the valve orifice erosion,and the high-speed collision and scraping with the working edge during the movement of particles were the main forms of orifice erosion.The mean erosion rate and variance were about 1 and 0.8 times higher than those in the backflow area,respectively.

关 键 词：液压伺服滑阀 阀口冲蚀 微观形貌 颗粒运动 液流方向 

分 类 号：TH137[机械工程—机械制造及自动化]