Numerical modeling of mechanical performances of aerostatic bearing with orifice-type restrictor

Yi-fei LI; Yi-hui YIN

doi:10.3788/OPE.20172402.0417

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Numerical modeling of mechanical performances of aerostatic bearing with orifice-type restrictor

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-07-07

- Numerical modeling of mechanical performances of aerostatic bearing with orifice-type restrictor
- Optics and Precision Engineering Vol. 25, Issue 2, Pages: 417-424(2017)
- 作者机构：
  
  中国工程物理研究院总体工程研究所, 四川绵阳 621900
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172402.0417
  CLC： TH133.36
- Received：15 August 2016，
  
  Accepted：20 October 2016，
  
  Published：25 February 2017
- 稿件说明：
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Yi-fei LI, Yi-hui YIN. Numerical modeling of mechanical performances of aerostatic bearing with orifice-type restrictor[J]. Optics and precision engineering, 2017, 25(2): 417-424.
DOI：

Yi-fei LI, Yi-hui YIN. Numerical modeling of mechanical performances of aerostatic bearing with orifice-type restrictor[J]. Optics and precision engineering, 2017, 25(2): 417-424. DOI： 10.3788/OPE.20172402.0417.

摘要

为了讨论小孔节流空气静压支承轴承的节流器尺寸，气膜厚度与供气压等轴承参数对轴承力学性能的影响。针对圆柱腔小孔节流静压支承止推轴承，首先进行了轴承间隙流场的数值仿真与分析，其中以小孔尺寸，气腔尺寸，供气压及气膜厚为设计变量，利用正交实验设计的基本原理构造正交表，通过对轴承间隙流场的数值计算进行采样以获取轴承的承载力与刚度；其次在设计变量范围内基于径向基神经网络模型建立承载力与刚度的分析数学模型，在该分析模型中全面考虑了各轴承参数的作用，同时考虑了轴承间隙的流场结构对力学性能的影响，得到的模型经过拟合校验以证明具有足够的精度；最后基于该分析模型讨论了小孔与气腔尺寸对轴承承载力与刚度的影响，为工程设计提供了参考。

Abstract

To discuss the impact of bearing parameters

including the restrictor size

air film thickness and air supply pressure

on mechanical performance of the orifice restricted aerostatic bearing. Firstly

taking the orifice restricted hydrostatic thrust bearing with cylindrical chamber for an example

carried out a numerical simulation and analyzed in the bearing clearance flow field

in which the orifice size

air chamber size

air supply pressure and air film thickness were taken as the design variables

established an orthogonal array by utilizing the basic principle of orthogonal experimental design

and then took samples through numerical calculation of the bearing clearance flow field to obtain load carrying capacity and stiffness of the bearing; secondly

built an analysis mathematical model for load capacity and stiffness

in which the functions of each parameter and the impact of flow field structure on the mechanical performance were taken into consideration

within the range of design variables based on the radial basis functions model

and the obtained model was proved with sufficient precision through fitting verification; finally

analyzed the impact of orifice size and air chamber size on load capacity and stiffness of the bearing

which provided a reference for engineering design.

关键词

Keywords

references

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