液压与气动2025，Vol.49Issue(7)：67-76,10.DOI:10.11832/j.issn.1000-4858.2025.07.007
多孔质节流器的材料特性测试及应用验证
Material Property Testing of Porous Restrictors and Application of Porous Restrictor
摘要
Abstract
Porous graphite materials significantly influence the performance of porous restrictors,which are key components of aerostatic guideways.This study employs the compressible Darcy-Forchheimer equation to fit experimental data and determine the permeability and inertia coefficients of porous graphite with five different porosities(18%,17%,13%,12%,11%).A CFD model incorporating these coefficients is established,accurately predicting the flow velocity and pressure drop within the porous medium,with an error margin within 5%.Further analysis under various supply pressures and loading conditions reveals that restrictors made from low-permeability graphite materials exhibit superior load-bearing capacity and gas film stiffness.Specifically,under a supply pressure of 0.45 MPa,the stability of the aerostatic block is significantly enhanced.Based on this research,an experimental platform for an aerostatic guideway with an adjustable gas film thickness is constructed using low-permeability restrictors.The guideway surface straightness is verified using a Keyence laser sensor,achieving better than 2.5 μm/600 mm.关键词
多孔质节流器/材料特性/可压缩Darcy-Forchheimer/气浮导轨/刚度特性Key words
porous restrictors/material properties/compressible Darcy-Forchheimer/aerostatic guideway/stiffness characteristics分类
机械制造引用本文复制引用
张楚鹏,周佳,种林坤,孔德伟,陈肖..多孔质节流器的材料特性测试及应用验证[J].液压与气动,2025,49(7):67-76,10.基金项目
智能制造技术与装备全国重点实验室自主课题(IMETKF2023008) （IMETKF2023008）
现代制造质量工程湖北省重点实验室开放基金资助(KFJJ-2022006) （KFJJ-2022006）
