摘要
针对液压伺服滑阀动态阀口冲蚀磨损的问题,运用Fluent中的离散相模型(DPM)计算分析液压伺服滑阀动态阀口的冲蚀机制和影响因素。结果表明:与固定开度的阀口相比,动态调整过程中提高颗粒冲击频次会显著强化油液中污染物对工作边的冲蚀作用,阀芯工作边平均冲蚀率从6.55×10^(-9)kg/(m^(2)·s)增大到8.32×10^(-7)kg/(m^(2)·s);阀套工作边平均冲蚀率从2.59×10^(-8)kg/(m^(2)·s)增大到6.69×10^(-6)kg/(m^(2)·s)。中频小幅时的工作边平均冲蚀率最大,阀芯和阀套工作边平均冲蚀率均在100 Hz时达到最大值,分别为2.69×10^(-6)、1.16×10^(-5)kg/(m^(2)·s);阀芯和阀套工作边平均冲蚀率在振幅5μm时达到最大值,分别为6.4×10^(-6)、2.38×10^(-5)kg/(m^(2)·s);并通过测量阀口工作边形貌与圆角半径验证了仿真的有效性。
Aiming at the erosion and wear of hydraulic servo spool valve dynamic port,the discrete phase model(DPM)in Fluent was used to analyze the erosion mechanism and influencing factors of dynamic orifice of hydraulic servo spool valve.The results show that compared with the fixed opening port,the increase of particle impact frequency during the dynamic adjustment process significantly intensifies the erosion effect of pollutants in oil on the working edge,and the average erosion rate of the working edge of the spool increases from 6.55×10^(-9)kg/(m^(2)·s)to 8.32×10^(-7)kg/(m^(2)·s).The average erosion rate of the working side of the valve sleeve increases from^(2).59×10^(-8)kg/(m^(2)·s)to 6.69×10^(-6)kg/(m^(2)·s).When the medium frequency is small,the average erosion rate of the working side is the largest,and the average erosion rate of the working side of the spool and valve sleeve reaches the maximum value at 100 Hz,which are 2.69×10-6 kg/(m^(2)·s)and 1.16×10^(-5)kg/(m^(2)·s),respectively.The average erosion rate of the working side of the spool and valve sleeve reaches the maximum value when the amplitude is 5μm,which is 6.4×10^(-6)kg/(m^(2)·s)and 2.38×10^(-5)kg/(m^(2)·s)respectively.The effectiveness of the simulation is verified by measuring the shape of the working edge of the valve port and the round radius.
作者
刘新强
林广
冀宏
王聪
肖尧
齐铭桦
LIU Xinqiang;LIN Guang;JI Hong;WANG Cong;XIAO Yao;QI Minghua(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Key Laboratory of Advanced Pumps,Valves and Flow Control System of the Ministry of Education,Lanzhou Gansu 730050,China;State Key Laboratory of Fluid Power&Mechatronic Systems,Zhejiang University,Hangzhou Zhejiang 310027,China)
出处
《机床与液压》
北大核心
2025年第4期107-113,共7页
Machine Tool & Hydraulics
基金
国家自然科学青年科学基金项目(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)。
关键词
液压伺服滑阀
小开度
动态阀口
冲蚀率
DPM模型
hydraulic servo spool valve
small opening
dynamic orifice
erosion rate
DPM model
