电液控换向阀流场仿真与响应面预测  

Flow Field Simulation and Response Surface Prediction of Electro-hydraulic Control Directional Valve

作　　者：叶壮 潘占仁 赖岳华 赵玉贝 崔耀 YE Zhuang;PAN Zhan-ren;LAI Yue-hua;ZHAO Yu-bei;CUI Yao(Beijing Tianma Intelligent Control Technology Co.,Ltd.,Beijing 101399)

机构地区：[1]北京天玛智控科技股份有限公司,北京101399

出　　处：《液压与气动》2024年第6期142-151,共10页Chinese Hydraulics & Pneumatics

摘　　要：大流量电液控换向阀是支架液压系统的关键控制元件之一,仿真手段对于换向阀的流动特性分析具有重要意义,然而流体仿真存在计算复杂度高、仿真时间较长的问题,对于要求实时高效流动特性分析的场合并不适用。因此,针对大流量电液控换向阀在不同阀口开度、不同入口压力、不同流量下的流场分布情况进行了仿真分析,发现换向阀入口压力随阀口关闭值呈指数上升趋势,随流量增加呈上升趋势,与出口压力值接近正比关系,并且阀口关闭位移越大换向阀入口附近涡流越剧烈。在换向阀流场仿真的基础上采用均匀抽样方法进行试验设计,提出并建立了基于多维勒让德正交多项式的响应面模型,采用均方根误差、决定系数和经过调整的决定系数,验证了响应面模型替代Fluent仿真模型进行流场分析的准确性和快速性,通过前期少量的流场仿真数据建立响应面模型,实现了大流量电液控换向阀流动特性的实时高效预测。The large-flow electro-hydraulic control directional valve is one of the key control components of the support hydraulic system.The simulation method is of great significance for analyzing the flow characteristics of the directional valve.However,fluid simulation has the problem of high computational complexity and long simulation time,which is not suitable for field merging that requires real-time and efficient flow characteristic analysis.This paper simulates and analyzes the flow field distribution of the large flow electro-hydraulic control directional valve under different valve openings,different inlet pressures,and different flow rates.It is found that the inlet pressure of the directional valve increases exponentially with the closing value of the valve port,shows an upward trend with the increase of the flow rate,and is close to a proportional relationship with the outlet pressure value,and the larger the valve opening degree is,the more intense the vortex near the valve string is.On the basis of the flow field simulation of the directional valve,the uniform sampling method is used to carry out the design of experiments,and the response surface model based on the multi-dimensional Legendre orthogonal polynomial is proposed and established.The accuracy and rapidity of the flow field analysis using the response surface model instead of the Fluent simulation model are verified by using the root mean square error,the coefficient of determination and the adjusted coefficient of determination,a response surface model was established based on a small amount of simulation data of the flow field in the early stage,achieving real-time and efficient prediction of the flow characteristics of the large flow electro-hydraulic control directional valve.

关 键 词：电液控换向阀 Fluent仿真 多维勒让德正交多项式 响应面 

分 类 号：TH137[机械工程—机械制造及自动化] TD355[矿业工程—矿井建设]