Dynamic Characteristics Analysis and Experimental Study for Gas Bearings

doi:10.7652/xjtuxb201908009

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Dynamic Characteristics Analysis and Experimental Study for Gas Bearings

更新时间：2025-07-09

- Dynamic Characteristics Analysis and Experimental Study for Gas Bearings
- Vol. 53, Issue 8, Pages: 68-75(2019)
- 作者机构：
  
  北京工业大学先进制造技术北京市重点实验室,北京,100024
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201908009
  CLC： TH133.35
- Online First：10 August 2019，
  
  Published：2019
- 稿件说明：
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Dynamic Characteristics Analysis and Experimental Study for Gas Bearings[J]. 2019, 53(8): 68-75.
DOI：

Dynamic Characteristics Analysis and Experimental Study for Gas Bearings[J]. 2019, 53(8): 68-75. DOI： 10.7652/xjtuxb201908009.

摘要

针对气体静压主轴回转误差求解不准确的问题

提出了一种利用气膜阻尼模型预测气体轴承动态特性的计算方法

揭示了气膜阻尼影响气体轴承动态特性的内在机制。首先通过微扰动法和分离变量法对气体轴承的气膜阻尼系数建模并求解分析; 然后将气膜阻尼系数引入轴承转子系统进行动力学建模

计算分析阻尼系数对气体轴承动态特性的影响; 最后搭建气体轴承回转误差测量试验台

得到主轴实时回转跳动误差信号并与理论结果进行对比。实验结果表明:与未考虑气膜阻尼特性的回转跳动误差相比

考虑气膜阻尼特性计算的主轴回转跳动误差值更加接近实验测量值

考虑气膜阻尼特性使主轴跳动误差率减小了4.93%～8%。研究结果可为气体轴承动态特性的预测和精度控制提供理论参考。

Abstract

A calculation method for predicting the dynamic characteristics of gas bearings is proposed to solve the problem of inaccurate solution to the aerostatic spindle rotation error and to reveal the internal mechanism of the film damping affecting the dynamic characteristics of gas bearings. The method uses the film damping model

and the gas film damping coefficient of the air bearing is modeled and solved by the micro-perturbation method and the variable separation method. Then

the film damping coefficient is introduced into the dynamic model of bearing-rotor system

and the influence of the damping coefficient on the dynamic characteristics of a gas bearing is calculated and analy-ed. Finally

a test bench for measuring the gas bearing rotation error is set up

and the real-time rotary runout error signal of the spindle is obtained and compared with the theoretical result. Experimental results and a comparison with the rotation runout error without considering the damping characteristi

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references

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