化工学报 ›› 2012, Vol. 63 ›› Issue (S2): 181-186.DOI: 10.3969/j.issn.0438-1157.2012.z2.034

• 能源和环境工程 • 上一篇    下一篇

气体轴承透平膨胀制冷机的低频振动特性

赵晨1,2, 杨金福1, 韩东江1,2, 齐伟军3, 陈昌婷1,2   

  1. 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
  • 收稿日期:2012-09-21 修回日期:2012-09-28 出版日期:2012-12-28 发布日期:2012-12-28
  • 通讯作者: 赵晨
  • 作者简介:赵晨(1988-),女,硕士研究生。
  • 基金资助:

    国家科技支撑计划项目(2012BAA11B02)。

Low-frequency vibration characteristic of gas bearing turbo-refrigerator

ZHAO Chen1,2, YANG Jinfu1, HAN Dongjiang1,2, QI Weijun3, CHEN Changting1,2   

  1. 1. Institute of Engineering Thermo Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;
    3. School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
  • Received:2012-09-21 Revised:2012-09-28 Online:2012-12-28 Published:2012-12-28
  • Supported by:

    supported by the Key Projects in the National Science & Technology Pillar Program(2012BAA11B02).

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。

关键词: 气体轴承, 透平膨胀制冷机, 低频振动

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.

Key words: gas bearings, turbo-refrigerator, low-frequency vibration

中图分类号: