Frequency Enhancement of Oil Whip and Oil Whirl in a Ferrofluid–Lubricated Hydrodynamic Bearing–Rotor System by Magnetic Field with Permanent Magnets

The article describes the effect of a magnetic field applied to a ferrofluid–lubricated hydrodynamic journal bearing–rotor system. A rotor with a single journal bearing in one end was built to be the test rig. The experimental results showed that 3 to 8 permanent magnets, arranged by different metho...

Full description

Saved in:
Bibliographic Details
Published inApplied sciences Vol. 8; no. 9; p. 1687
Main Authors Luo, Liao-Yong, Fan, Yi-Hua, Tang, Jyh-Haw, Chen, Ting-Yu, Zhong, Nai-Rong, Feng, Pin-Chieh, Kao, Yu-Chun
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2018
Subjects
bearing lubricating fluid
Computational fluid dynamics
ferrofluid
Ferrofluids
Field strength
Fluids
hydrodynamic bearing
Journal bearings
Lubricants & lubrication
Lubrication
Magnetic fields
Magnetic fluids
Magnetic permeability
oil whip
Oil whirl
Permanent magnets
Permeability
Permeability coefficient
Pressure distribution
Researchers
Rheology
Rotor-bearing systems
Sensors
Stiffness
Temperature
Vacuum
Viscosity
United States > US
Taiwan
Online AccessGet full text

Cover

More Information
Summary:The article describes the effect of a magnetic field applied to a ferrofluid–lubricated hydrodynamic journal bearing–rotor system. A rotor with a single journal bearing in one end was built to be the test rig. The experimental results showed that 3 to 8 permanent magnets, arranged by different methods, can all increase the instability threshold of the oil bearing. Especially, the magnetic field formed by eight magnets has the optimal effect. The whirl speed and the whip speed can be increased from 3024 rpm to 4480 rpm, and from 3184 rpm to 5268 rpm.
ISSN:2076-3417
2076-3417
DOI:10.3390/app8091687