多孔质石墨静压气体推力轴承静态特性

发布时间：2018-05-28 13:11

本文选题：多孔质石墨 + 静压气体推力轴承　；参考：《湖南大学学报(自然科学版)》2017年10期

【摘要】：为了研究多孔质石墨静压气体推力轴承的静态特性,建立了相对应的理论计算模型.基于该模型分析了多孔质石墨密度、表面限制层、供气压力以及气体质量流量等因素对多孔质石墨静压气体推力轴承静态特性的影响.理论计算结果表明,轴承承载力与石墨密度成负相关、与供气压力成正相关,并在有表面限制层时较大;气体质量流量与石墨密度成负相关、与供气压力成正相关,并在有表面限制层时较大;轴承的刚度与石墨密度、供气压力成正相关,并在有表面限制层时较大.进一步设计实验台,绘制出多孔质石墨静压气体推力轴承的气膜厚度与承载力的静态特性曲线图.对比发现,实验结果与理论结果吻合较好,从而验证了数值计算方法的可靠性.
[Abstract]:In order to study the static characteristics of the porous graphite static pressure gas thrust bearing, a corresponding theoretical calculation model is established. Based on this model, the effects of factors such as porous graphite density, surface confinement layer, gas pressure and gas mass flow on the static characteristics of the multi porous graphite hydrostatic thrust bearing are analyzed. The theoretical calculation results are given. Bearing capacity of bearing is negatively correlated with graphite density, which is positively related to gas supply pressure and is larger when there is a surface limiting layer; gas mass flow is negatively correlated with graphite density, and is positively related to gas pressure and is larger when there is a surface limiting layer; bearing stiffness is positively correlated with gas pressure, and there is a surface limiting layer. The experimental bench is further designed to plot the static characteristic curves of the gas film thickness and bearing capacity of the multi hole graphite static pressure gas thrust bearing. The comparison shows that the experimental results are in good agreement with the theoretical results, thus verifying the reliability of the numerical calculation method.
【作者单位】：湖南大学汽车车身先进设计制造国家重点实验室;
【基金】：国家自然科学基金资助项目(51575170) 国家科技支撑计划资助项目(2015baf32b01)~~
【分类号】：TH133.35

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