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Research Papers: Hydrodynamic Lubrication

Performance Characteristics of an Innovative Journal Bearing With Adjustable Bearing Elements

[+] Author and Article Information
R. Pai

Professor
Department of Mechanical and
Manufacturing Engineering,
Manipal Institute of Technology,
Manipal University,
Manipal 576 104, Karnataka, India
e-mail: rbpai@yahoo.com

D. W. Parkins

Lubrication Research Group,
Cranfield University,
Cranfield MK43 0AL, Bedford, UK

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received July 8, 2017; final manuscript received January 17, 2018; published online February 22, 2018. Assoc. Editor: Mihai Arghir.

J. Tribol 140(4), 041705 (Feb 22, 2018) (11 pages) Paper No: TRIB-17-1271; doi: 10.1115/1.4039134 History: Received July 08, 2017; Revised January 17, 2018

The development of new machines capable of running at high loads and speeds is an important industrial requirement, which demands that the performance envelope of the support systems for these machines be extended. Conventional full cylindrical fluid film bearings may present instability problems at higher speeds and loads, which has been countered by the use of different bearing bore shapes. In this paper, the performance characteristics of a novel fluid film bearing, comprising of a number of adjustable bearing elements is presented. Experiments have been performed to measure the static characteristics of the novel bearing with different radial and tilt adjustments of the bearing elements. The test bearing has an L/D ratio of 0.53 and was run at 2000, 5000, and 7000 rpm. The load on the bearing was varied from 0 to 600 N. Eccentricity, attitude angle, temperature of oil; power absorbed; and stability are measured. Experimental results are compared with those for a conventional axial groove plain cylindrical bearing having the same L/D ratio and run under similar conditions. Test results indicate that the novel bearing is very stable at zero loads and at 8800 rpm. Typical results obtained are presented. A few of the attributes and features of the novel bearing are also presented.

FIGURES IN THIS ARTICLE
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Copyright © 2018 by ASME
Topics: Bearings , Stress , Stability
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References

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Figures

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Fig. 1

Novel bearing geometry showing tilt and radial adjustment

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Fig. 2

Schematic representation of novel bearing

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Fig. 3

Experimental prototype bearing

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Fig. 6

Loading arrangement

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Fig. 7

Test bearing arrangement

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Fig. 8

Location of center of rotation

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Fig. 9

0 mm radial adjustment: (a) ε—ϕ plot, (b) ε—load plot, (c) ε—flow rate plot, and (d) ε—power loss plot

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Fig. 10

+0.015 mm radial adjustment: (a) ε—ϕ plot, (b) ε—load plot, (c) ε—flow rate plot, and (d) ε—power loss plot

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Fig. 11

−0.012 mm radial adjustment: (a) ε—ϕ plot, (b) ε—load plot, (c) ε—flow rate plot, and (d) ε—power loss plot

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Fig. 12

Conventional axial groove bearing: (a) ε—ϕ plot, (b) ε—load plot, (c) ε—flow rate plot, and (d) ε—power loss plot

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