| 气体轴承透平膨胀制冷机的低频振动特性 |
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| 引用本文： | 赵晨,杨金福,韩东江,齐伟军,陈昌婷.气体轴承透平膨胀制冷机的低频振动特性[J].化工学报,2012,0(Z2):181-186. |
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| 作者姓名： | 赵晨 杨金福 韩东江 齐伟军 陈昌婷 |
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| 作者单位： | 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 |
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| 基金项目： | 国家科技支撑计划项目(2012BAA11B02)~~ |
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| 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。
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| 关 键 词： | 气体轴承 透平膨胀制冷机 低频振动 |
| 收稿时间： | 2012-09-21 |
| 修稿时间： | 2012-09-28 |
Low-frequency vibration characteristic of gas bearing turbo-refrigerator |
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| ZHAO Chen,YANG Jinfu,HAN Dongjiang,QI Weijun,CHEN Changting.Low-frequency vibration characteristic of gas bearing turbo-refrigerator[J].Journal of Chemical Industry and Engineering(China),2012,0(Z2):181-186. |
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| Authors: | ZHAO Chen YANG Jinfu HAN Dongjiang QI Weijun CHEN Changting |
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| Affiliation: | 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 |
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| 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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| Keywords: | gas bearings turbo-refrigerator low-frequency vibration |
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