Journal
TRIBOLOGY INTERNATIONAL
Volume 75, Issue -, Pages 61-68Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2014.03.001
Keywords
Ferrofluids; Oil-film bearing; Viscosity calculation; Monitoring strategy
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Funding
- National Youth Science Foundation of China [51205269]
- Shanxi Provincial Natural Science Foundation of China [2012011018-2]
- Shanxi Scholarship Council of China [2013-093]
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Ferrofluid application in the oil-film bearing can improve the viscosity and the load-carrying capacity in a magnetic field. A solenoid was developed to provide magnetic field for ferrofluid, using which the distribution of magnetic induction intensity was calculated. The viscosity equation of ferrofluid was derived. The effects of oil-film temperature T, oil-film pressure P and magnetic intensity H on ferrofluid viscosity eta(f) was analyzed and tested by an unifactor experiment method. The control equations and transfer functions of each variable were given based on a large-scale oil-film bearing test rig. The variations of P, T, H and eta(f) were simulated and monitored by a reasonable control strategy. The results suggest that the viscosity increment by magnetic intensity could compensate the viscosity decrement by temperature rise. (C) 2014 Elsevier Ltd. All rights reserved.
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