小间隙下狭缝节流静压气体止推轴承静态性能的研究

发布时间：2018-04-24 18:14

本文选题：狭缝节流 + 止推轴承　；参考：《机床与液压》2017年13期

【摘要】：减小气膜间隙可以提高气体轴承的刚度和承载,为研究小间隙下狭缝节流气体止推轴承静特性,运用FLUENT软件对小间隙下狭缝节流止推轴承进行流场仿真。采用滑移边界条件对小间隙下轴承流场进行计算,结果表明,随着气膜厚度的增加,滑移的影响逐渐减小,当膜厚大于等于4μm时滑移影响可以忽略。计算了狭缝结构对轴承静特性的影响,结果表明,在其他参数相同的条件下,轴承的承载力随狭缝的宽度的增加而增加;随着狭缝深度的增加而减小。在其它结构参数相同的条件下,随着狭缝宽度的减小,最大刚度值增加,最大刚度对应的气膜厚度逐渐减小;随着狭缝深度的增加,最大刚度值增加,最大刚度对应的气膜厚度逐渐减小。
[Abstract]:The stiffness and bearing capacity of gas bearing can be improved by reducing the film clearance. In order to study the static characteristics of narrow slit throttling gas thrust bearing with small clearance, the flow field simulation of narrow slit throttling thrust bearing with small clearance is carried out by using FLUENT software. The slip boundary condition is used to calculate the flow field of the bearing with small clearance. The results show that the effect of slippage decreases with the increase of the film thickness, and the slip effect can be neglected when the film thickness is greater than or equal to 4 渭 m. The influence of slit structure on the static characteristics of bearing is calculated. The results show that the bearing capacity increases with the width of slit and decreases with the increase of slit depth under the same conditions of other parameters. Under the same structural parameters, with the decrease of slit width, the maximum stiffness value increases, the film thickness corresponding to the maximum stiffness decreases gradually, and the maximum stiffness value increases with the increase of slit depth. The film thickness corresponding to the maximum stiffness decreases gradually.
【作者单位】：大连海事大学交通运输装备与海洋工程学院;
【基金】：辽宁省科学研究资助项目(L2014026) 国家青年基金资助项目(51405523) 中央高校基本科研业务费资助项目
【分类号】：TH133.36

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