摘要
针对液压集成阀块内部流道的结构形式和结构参数设计不当易引发油液产生漩涡、导致阀块内压力损失增大及液压冲击振动噪声加剧的问题,通过分析流道内油液的速度场和压力场,揭示流道结构形式和结构参数对阀块中油液压力损失和液动力的影响规律。采用计算流体动力学仿真方法,运用Fluent软件并选取Realizableκ-ε湍流模型,对典型流道结构进行流场分析。通过系统改变流道直径、圆角半径、倒角长度、流道长度及退刀槽长度等关键参数,模拟分析油液的速度场与压力场,量化研究各结构参数对压力损失与液动力的影响规律。最后,对阀块中的流道进行参数优化,对比优化前后的液动力和压力损失。结果表明:各参数对压力损失的影响由大到小依次为:T形合流流道入口直径、L形流道入口直径、圆角半径、L形流道入口长度、倒角长度、T形合流流道入口长度、T形分流流道出口长度、退刀槽长度;对液动力的影响由大到小依次为:L形流道入口直径、T形合流流道入口直径、圆角半径、倒角长度、退刀槽长度、L形流道入口长度、T形合流流道入口长度、T形分流流道出口长度;与优化前相比,优化后流道液动力降低3.59%,压力损失平均降低25.59%,最大降幅达34.03%,达到了抑振降噪的目的。研究揭示了液压集成阀块流道结构参数对压力损失与液动力的影响规律。
Inadequate design of the internal flow channel structure and parameters in hydraulic integrated valve blocks can easily cause oil to generate vortices,increase pressure loss within the valve block,and intensify hydraulic shock,vibration and noise.By analyzing the velocity field and pressure field of the oil within the flow channels,the influence laws of the flow channel structure and parameters on the oil pressure loss and hydrodynamic force in the valve block were revealed.Computational fluid dynamics simulation methods were adopted,and the Fluent software was used with the Realizable κ-ε turbulence model to conduct flow field analysis on typical flow channel structures.By systematically varying key parameters such as the flow channel diameter,fillet radius,chamfer length,flow channel length,and relief groove length,the velocity field and pressure field of the oil were simulated and analyzed,and the influence laws of each structural parameter on pressure loss and hydrodynamic force were quantitatively studied.Finally,the flow channels in the valve block were parameter-optimized,and the hydrodynamic force and pressure loss before and after optimization were compared.The results show that the influence of each parameter on pressure loss,from greatest to least,is:the inlet diameter of the T-shaped converging flow channel,the inlet diameter of the L-shaped flow channel,the fillet radius,the inlet length of the L-shaped flow channel,the chamfer length,the inlet length of the T-shaped converging flow channel,the outlet length of the T-shaped diverging flow channel,and the relief groove length.The influence on hydrodynamic force,from greatest to least,is:the inlet diameter of the L-shaped flow channel,the inlet diameter of the T-shaped converging flow channel,the fillet radius,the chamfer length,the relief groove length,the inlet length of the L-shaped flow channel,the inlet length of the T-shaped converging flow channel,and the outlet length of the T-shaped diverging flow channel.Compared with before optimization,the hydrodynamic force of the flow channels is reduced by 3.59% after optimization,and the average pressure loss is reduced by 25.59%,with the maximum reduction reaching 34.03%,achieving the purpose of vibration suppression and noise reduction.The research reveals the influence laws of the flow channel structure parameters in hydraulic integrated valve blocks on pressure loss and hydrodynamic force.
作者
刘晓红
李石林
禹帅
曹学鹏
吴文海
LIU Xiaohong;LI Shilin;YU Shuai;CAO Xuepeng;WU Wenhai(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu Sichuan 611756,China;Key Laboratory of Road Construction Technology and Equipment of MOE,Chang′an University,Xi′an Shaanxi 710064,China)
出处
《机床与液压》
北大核心
2026年第5期182-190,共9页
Machine Tool & Hydraulics
基金
船舶振动噪声重点实验室基金(JCKY2022207CI10)。
关键词
液压集成阀块
压力损失
振动噪声
流道结构
参数优化
hydraulic integrated valve block
pressure loss
vibration noise
flow channel structure
parameter optimization
