Miniature Aerodynamic Elastic Foil Gas Bearing for Palm-Sized High Speed Turboexpander

doi:10.7652/xjtuxb201407001

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Miniature Aerodynamic Elastic Foil Gas Bearing for Palm-Sized High Speed Turboexpander

更新时间：2025-07-09

- Miniature Aerodynamic Elastic Foil Gas Bearing for Palm-Sized High Speed Turboexpander
- Vol. 48, Issue 7, Pages: 1-4(2014)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201407001
  CLC： TH117
- Online First：10 July 2014，
  
  Published：2014
- 稿件说明：
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Miniature Aerodynamic Elastic Foil Gas Bearing for Palm-Sized High Speed Turboexpander[J]. 2014, 48(7): 1-4.
DOI：

Miniature Aerodynamic Elastic Foil Gas Bearing for Palm-Sized High Speed Turboexpander[J]. 2014, 48(7): 1-4. DOI： 10.7652/xjtuxb201407001.

摘要

为了满足微小型高速透平稳定、可靠运转的要求

设计研制了一种以精密机加工制作为目的的微小型箔片气体轴承

提出了以弹性鼓泡支承的新型波箔结构

其中箔片元件由表面光滑的平箔和半球型鼓泡突起体的弹性底箔组成

鼓泡箔片可采用单层鼓泡或多层鼓泡

多层鼓泡的第一层鼓泡在第二层鼓泡的跨距中央。在一台主轴轴径为6 mm的掌上高速透平上首次进行了振动特性及稳定性试验

结果表明:新型鼓泡箔片轴承具有良好的阻尼特性

对转子不稳定涡动的抑制能力较强; 鼓泡自身变形具有调节刚度和阻尼的特点; 在全动压条件下

试验透平稳定运转达到近36万r/min。

Abstract

To meet the operation requirement of miniature high speed turbo-machinery

a new type of compliant aerodynamic foil gas bearing manufactured by conventionally precise machining is developed

where the foil configuration is composed of smooth top foil and elastic bump foil with series of hemispherical convex dots. This kind of bump foil contains one layer or multilayer structure. For multilayer structure

the convex dots on the first layer are set on the middle of span of second layer convex dots. This foil bearing is firstly applied to a palm-sized high speed turboexpander with shaft diameter of 6 mm

and an experiment on a high speed gas bearing turboexpander test rig is conducted to examine the vibration characteristic and stability. It indicates that the proposed foil bearing is endowed with fine damping performance to restrain unstable whirling. The hemispherical convex dots on the foil are able to adjust foil stiffness and damping by the self-deformation. The maximum rotational speed of the tested palm-sized turboexpander reaches 360 000 r/min.

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references

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陈汝刚,陈韬,龚超.箔片动压止推气体轴承流固耦合数值模拟.2014,48(5):72-77.[doi:10.7652/xjtuxb201405013]

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陈汝刚,周权,刘烨,等.新型箔片动压止推气体轴承承载特性的试验研究.2010,44(9):54-58.[doi:10.7652/xjtuxb 201009011]

陈汝刚,侯予,陈纯正.微型气浮轴承高速透平膨胀机的研制.2010,44(1):61-65.[doi:10.7652/xjtuxb201001014]

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Related Institution

Institute of Cryogenic Engineering, Xi’an Jiaotong University

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University

State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University

Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology

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