NDLI: Experimental Analysis of Dynamic Oil Film Pressure of Tilting-Pad Journal Bearings

Content Provider	Springer Nature Link
Author	Shen, Jiexi Xiong, Xin Li, Guoping Wang, Xiaojing Hua, Zikai Nie, Zhou
Copyright Year	2016
Abstract	With the increase in capacity demand, the development of rotating machinery is toward larger scale, higher speed, and intellectualization. In order to achieve a safer and more reliable operation, a better vibration performance of the rotor-bearing system is expected. Tilting-pad journal bearings have many advantages such as improved dynamic performance and drastic reduction in instability; therefore, they are widely used in rotating machinery. The nonlinearity of the dynamic oil film force is one of the fundamental parameters for an oil film bearing supported rotor system. A mounts of scholars and technicians have conducted theoretical research in this field. This paper focuses on the experimental research of the nonlinearity of dynamic oil film force. Oil film force was measured in various experiments, where relevance and sensitivity to vibration responses were evaluated under different operation speeds and excitation frequencies. The research was mainly divided into three steps. Firstly, experimental measurements data of oil film pressure under different speeds and static loads were verified by theoretical numerical calculation. Secondly, the feature information of displacement and pressure under different dynamic loads and excitation frequency was obtained from experiments. In addition, the frequency compositions of displacement and pressure were compared. Finally, a newly developed time–frequency analysis tool, named the synchrosqueezing wavelet transform, was employed to characterize the displacement and pressure features. Through the comparison between the time–frequency compositions of these two features,there are more signal characteristics presented in the time–frequency spectrums of dynamic oil film force. Characteristics like amplitude of both excitation frequency and half-frequency whirl frequency are more obvious in those spectrums. It can be concluded that the measurement of dynamic oil film force is an effective method to monitor the real-time status of the rotor-bearing system vibration.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	63
Issue Number	3
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2016-08-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dynamic oil film pressure Spectrum analysis Tilting-pad journal bearing Rotor-bearing system Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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