Experimental research on the dynamic characteristics of gas-hybrid bearing-flexible rotor system

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	Experimental research on the dynamic characteristics of gas-hybrid bearing-flexible rotor system
	Han, Dongjiang; Yang, Jinfu; Chen, Changting; Tang, Changliang
刊名	JOURNAL OF VIBROENGINEERING
	2014-08-01
卷号	16 期号:5 页码:2363-2374
关键词	vibration gas-film whirling stability gas-film whip bearing supply air pressure
英文摘要	High-speed gas bearings for turbomachinery can dramatically improve the isentropic efficiency of turbine plants. Vibrations, especially low-frequency vibrations caused by the gas-film self-excited vibrations, significantly affect the safety and economy of the turbomachinery, which is dangerous at high rotational speeds. This experimental study focuses on the dynamic characteristics of a flexible rotor supported by gas hybrid bearing and driven by a radial turbine with high-pressure air. Cylindrical whirling, conical whirling, and first-order bending natural frequencies that change with bearing supply pressures were obtained by experimental modal analysis. Nonlinear mechanic behaviors, including gas film half-speed whirling and gas-film whip, in the experiments were identified by nonlinear measurements and analyses. The occurrence mechanism of gas-film whirling and whip is also discussed in this paper. Experiments for eliminating and restraining whirling and whip were conducted to investigate the gas bearing-rotor system stability effect of bearing supply pressure and elastic foundation. Some simple and effective measures were given to improve the stable rotational speed.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Biomedical ; Engineering, Mechanical
研究领域[WOS]	Engineering
收录类别	SCI
语种	英语
WOS记录号	WOS:000340726000023
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/106040]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Han, Dongjiang,Yang, Jinfu,Chen, Changting,et al. Experimental research on the dynamic characteristics of gas-hybrid bearing-flexible rotor system[J]. JOURNAL OF VIBROENGINEERING,2014,16(5):2363-2374.
APA	Han, Dongjiang,Yang, Jinfu,Chen, Changting,&Tang, Changliang.(2014).Experimental research on the dynamic characteristics of gas-hybrid bearing-flexible rotor system.JOURNAL OF VIBROENGINEERING,16(5),2363-2374.
MLA	Han, Dongjiang,et al."Experimental research on the dynamic characteristics of gas-hybrid bearing-flexible rotor system".JOURNAL OF VIBROENGINEERING 16.5(2014):2363-2374.