双向均压槽节流静压气体轴承静态特性分析  

Analysis of Static Characteristics of Bidirectional Pressure Equalizing Groove Throttling Static Pressure Gas Bearings

作　　者：卢然 齐向阳[1] 付双松 马文竹 李泽岩 吴承亮 LU Ran;QI Xiangyang;FU Shuangsong;MA Wenzhu;LI Zeyan;WU Chengliang(School of Mechanical Engineering,Tiangong University,Tianjin 300387,China;Guizhou Liyang Equipment Technology Developmet Co.,Ltd.,Guiyang Guizhou 550000,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]贵州黎阳装备科技发展有限公司,贵州贵阳550000

出　　处：《润滑与密封》2024年第6期98-106,共9页Lubrication Engineering

基　　金：国家重点研发计划项目(2018YFB1701201)。

摘　　要：为进一步优化径向静压气体轴承的静态性能,提出在传统小孔节流的基础上配合开设轴向和周向均压槽的复合节流式静压气体径向轴承。利用Fluent软件对比分析传统孔式节流与不同形式复合节流静压气体轴承的静态特性,探究均压槽截面形状及供气压力对轴承静态特性的影响规律;利用正交试验探究节流器各结构参数对承载特性的影响。结果表明:复合节流式静压气体轴承在一定程度上提升了轴承的静态性能,其中均压槽以“口”字形布置以及截面形状为矩形时效果最优;供气压力的增大也可提升轴承静态特性;节流孔直径和均压槽深度对轴承静态特性的影响要大于节流孔深度和均压槽宽度,节流孔直径以及均压槽深度的增大均使得承载力与刚度呈现出先增大后减小的趋势。To further optimize the static performance of static pressure gas radial bearings,a composite throttling type static pressure gas radial bearing with axial and circumferential pressure equalizing grooves was proposed based on the traditional small hole throttling.Fluent was used to compare and analyze the static characteristics of the bearings with traditional orifice throttling and different forms of composite throttling,and the influence of the cross-sectional shape of the equalizing groove and the gas supply pressure on the static characteristics of bearings was explored.The orthogonal experiments were used to explore the influence of the structural parameters of the restrictor on the bearing characteristics.The results show that the composite throttling static pressure gas bearing improves the static characteristics of the bearing to a certain extent,and the best effect is achieved when the pressure equalizing groove is arranged in a “mouth” shape and the cross-sectional shape is rectangular.An increase in gas supply pressure can also improve the static characteristics of bearings.The influence of the diameter of the orifice and the depth of the equalizing groove on the static characteristics of bearings is larger than that of the depth of the orifice and width of the equalizing groove.The increase in the diameter of the orifice and the depth of the equalizing groove results in a trend of first increasing and then decreasing in the bearing capacity and stiffness of bearings.

关 键 词：径向静压气体轴承 均压槽布置形式 承载力 刚度 

分 类 号：TH122[机械工程—机械设计及理论]