基于CFD分析转子粗糙度对多孔质气体轴承承载性能的影响

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中图分类号：TH133.3 文献标识码：A 文章编号：2095-2953（2025）05-0067-06

Effect of Rotor Roughness on the Load-bearing Performance of Porous Gas Bearings Based on CFD

LIU Jia-bao’，XIA Peng1*，WU Li-guo²

（1.ColegeofMechanicalandElectricalEngineering，NortheastForestryUniversity，HarbinHeilongjiangl5O4，China; HarbinResearchInstituteofForestryachnery，heStateForestandGrassandAdministration，HarbinHelongangChin

Abstract：In order to examine the impact of rotor surface roughness on the static properties of porous gas bearings，a thermal hybrid lubrication model of porous gas bearings was established，and thestatic features of porous gas bearings were studied in detail byutilizing Fluent software.The rotor eccentricity was simulated by implementing the grid iteration methodand theuser-defined function（UDF）of tile motion.The effectsof eccentricity，roughness height，rotor speed and air supply pressre on the bearing load capacity were examined.The findings demonstrate thatwithin acertain limit，suitable roughnessheight may increase the bearing capacity，particularlyunder thesituationof high eccentricity，high speedand high air supply pressure.It is worth mentioning thatthe surface roughness will have a negative influence on the dynamic pressure effect of the bearing，which has atremendous impact on the dynamic pressure bearing.The outcomes of this research provide an essential reference for the machining precision of rotors of porous gas bearings.

Key words ：porous gas bearings；static properties；roughness； load-bearing capacity

相较于孔口型、槽型及凹槽型等传统节流器，多孔节流器应用于静压轴承时展现出显著优势。（剩余8415字）