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Technical Brief

Design and Development of Permanent Magneto-Hydrodynamic Hybrid Journal Bearing

[+] Author and Article Information
K. P. Lijesh

Department of Mechanical Engineering,
Indian Institute Technology Delhi,
New Delhi 110016, India
e-mail: lijesh_mech@yahoo.co.in

Harish Hirani

Professor
Department of Mechanical Engineering,
Indian Institute Technology Delhi,
New Delhi 110016, India
e-mail: hirani@mech.iitd.ac.in

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received April 2, 2016; final manuscript received October 14, 2016; published online March 29, 2017. Assoc. Editor: Bugra Ertas.

J. Tribol 139(4), 044501 (Mar 29, 2017) (9 pages) Paper No: TRIB-16-1107; doi: 10.1115/1.4035153 History: Received April 02, 2016; Revised October 14, 2016

Fluid film bearings (FFBs) provide economic wear-free performance when operating in hydrodynamic lubrication regime. In all other operating conditions, except hydrostatic regime, these bearings are subjected to wear. To get wear-free performance even in those conditions, a hybrid (hydrodynamic + rotation magnetized direction (RMD) configured magnetic) bearing has been proposed. The hybrid bearing consists of square magnets to repel the shaft away from the bearing bore. Load-carrying capacities of four configurations of hybrid bearings were determined. The results are presented in this paper. The best configuration of hybrid bearing was developed. A test setup was developed to perform the experiments on the fluid film and hybrid bearings. The wear results of both the bearings under same operating conditions are presented.

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Figures

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Fig. 1

Arrangement of magnets to increase the load-carrying capacity

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Fig. 2

Fluid film bearing test setup

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Fig. 3

Fluid film bearing: (a) bearing 1, (b) bearing 2, and (c) bearing 3

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Fig. 4

Hybrid bearing stator

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Fig. 5

Proposed hybrid bearing

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Fig. 6

Different configurations of magnetic bearing considered for the present case: (a) configuration 1, (b) configuration 2, (c) configuration 3, and (d) configuration 4

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Fig. 8

Load-carrying capacity for different configurations

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Fig. 9

Hybrid bearing: (a) bearing and magnets and (b) assembled hybrid bearing

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Fig. 10

Hybrid bearings: (a) bearing 4, (b) bearing 5, and (c) bearing 6

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Fig. 11

Cylindrical rotor and stator with square magnets: (a) front view and (b) side view

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Fig. 12

Sector magnets: (a) front view and (b) sectional side view

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Fig. 13

Cuboidal magnets: (a) front view and (b) sectional side view

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