Magnetorheological fluids (MRFs) are applicable for achieving semi-active control in smart bearings. For hydrodynamic bearings lubricated with MRF, changes of the viscosity induced by magnetic field lead to changes of the dynamic characteristics such as stiffness and damping properties, providing the controllability to the bearings in rotor applications. Two main defects of the MRF, however, may potentially limit the use of this kind of bearings. One is that the magnetic field-induced viscosity alteration capability decreases as the shear rate increases; the other is the extra friction introduced by iron particles in the MRF in external magnetic field. In this study, the floating ring bearing (FRB) and semi-floating ring bearing (sFRB) are introduced to replace common journal bearing for MRF-lubricated smart bearings. Performance enhancement is achieved using FRB and sFRB. The lubrication behavior of MRF is studied using the Herschel–Bulkley (HB) model that incorporates the yield stress and the shear-thinning effect, which are the two main features of the MRF under shearing. A kind of MRF is developed for lubrication application, and a test rig is setup to measure its shear rate–stress relationship and then to identify its HB model parameters. With the identified HB model, stiffness and damping characteristics of the MRF-lubricated FRB and sFRB are studied. Results show that, compared to MRF-lubricated common journal bearings, the MRF-lubricated FRB and sFRB both achieve better performances in damping enhancement, while limiting the journal friction to a relatively lower degree.
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September 2017
Research-Article
Stiffness and Damping Properties of (Semi) Floating Ring Bearing Using Magnetorheological Fluids as Lubricant
Xiaohu Wang,
Xiaohu Wang
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Search for other works by this author on:
Hongguang Li,
Hongguang Li
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Search for other works by this author on:
Wen Lu,
Wen Lu
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Search for other works by this author on:
Guang Meng
Guang Meng
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Search for other works by this author on:
Xiaohu Wang
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Hongguang Li
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Wen Lu
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
Guang Meng
State Key Laboratory of Mechanical System
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
and Vibration,
Shanghai Jiao Tong University,
Shanghai 200240, China
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 7, 2016; final manuscript received December 4, 2016; published online May 17, 2017. Assoc. Editor: Bugra Ertas.
J. Tribol. Sep 2017, 139(5): 051701 (11 pages)
Published Online: May 17, 2017
Article history
Received:
March 7, 2016
Revised:
December 4, 2016
Citation
Wang, X., Li, H., Lu, W., and Meng, G. (May 17, 2017). "Stiffness and Damping Properties of (Semi) Floating Ring Bearing Using Magnetorheological Fluids as Lubricant." ASME. J. Tribol. September 2017; 139(5): 051701. https://doi.org/10.1115/1.4035773
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