Flow Field Simulation and Response Surface Prediction of Electro-hydraulic Control Directional Valve
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.
electro-hydraulic control directional valvefluent simulationmultidimensional Legendre orthogonal polynomialresponse surface
国家科技期刊平台
NSTL
万方数据
