Low-frequency vibration characteristic of gas bearing turbo-refrigerator

ZHAO Chen; YANG Jinfu; HAN Dongjiang; QI Weijun; CHEN Changting

doi:10.3969/j.issn.0438-1157.2012.z2.034

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Low-frequency vibration characteristic of gas bearing turbo-refrigerator

更新时间：2025-12-10

- Low-frequency vibration characteristic of gas bearing turbo-refrigerator
- CIESC Journal Issue S2, Pages: 181-186(2012)
- 作者机构：
  
  1. 中国科学院工程热物理研究所,北京,100190
  2. 中国科学院研究生院,北京,100039
  3. 华北电力大学能源动力机械工程学院,北京,102206
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2012.z2.034
  CLC： H113.1TK14
- Online First：28 December 2012，
  
  Published：28 December 2012
- 稿件说明：
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ZHAO Chen, YANG Jinfu, HAN Dongjiang, et al. Low-frequency vibration characteristic of gas bearing turbo-refrigerator[J]. CIESC Journal, 2012, (S2): 181-186.
DOI：

ZHAO Chen, YANG Jinfu, HAN Dongjiang, et al. Low-frequency vibration characteristic of gas bearing turbo-refrigerator[J]. CIESC Journal, 2012, (S2): 181-186. DOI： 10.3969/j.issn.0438-1157.2012.z2.034.

摘要

针对气体轴承结构的某航空用空气透平膨胀机出现的低频振动现象

进行了不同轴承供气压力与升速率下的转子低频振动特性试验研究。通过分析不同参数下转子的气膜涡动和气膜振荡特性

证实了低频振动对转子运动行为及失稳的影响

在合适的供气压力和升速率下低频振动可以得到有效的抑制和消除。揭示了转子低频振动与系统机械效率之间的关系

并提出了一种计算低频振动耗能的方法。

Abstract

Experimental studies on low-frequency vibration

which are apt to happen on the gas bearing turbo-expander in the air refrigerator system for the airplanes

are carried out in this paper.Tests are conducted at various journal bearing supply pressure and run-rate to research the characteristics of low-frequency vibration i.e.gas-film whirl and gas-film whip.The experimental results verify the impact of low-frequency vibration on stability

and appropriate bearing supply pressure and run-rate can abate and eliminate the low-frequency vibration.More importantly

the results reveal the relationship between low-frequency vibration and the mechanical efficiency of rotor-bearing system

and an effective calculation equation is proposed.

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