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RESEARCH PAPERS

An Experimental Study of Journal Bearing Lubrication Effected by Journal Misalignment as a Result of Shaft Deformation Under Load

[+] Author and Article Information
Jun Sun, Changlin Gui, Zhiyuan Li

School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China

J. Tribol 127(4), 813-819 (Jun 23, 2005) (7 pages) doi:10.1115/1.2033007 History: Received January 04, 2005; Revised June 23, 2005

Journal bearing friction pair system is one of the most general and essential parts used in various mechanical devices. A special test bench is developed for the study on lubrication performance of cylindrical journal bearings. The effect of journal misalignment as a result of shaft bending under load is studied. The results show obvious changes at distribution and value of oil film pressure, oil film thickness and oil temperature of journal bearing due to journal misalignment. The higher the load on the shaft, the larger the journal misalignment resulted from shaft deformation, the more obvious effect on lubrication performance of journal bearing.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic representation of a shaft-journal bearing system

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Figure 2

View of experimental rig

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Figure 3

Schematic representation of mechanical parts for experimental rig

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Figure 4

Testing system of the experimental rig

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Figure 5

Angle γ of journal misalignment in bearing, maximum film pressure pmax, minimum film thickness hmin and average film temperature Tave on two sections of bearing against shaft load P (L=40mm,n=1500r∕min,c=0.045, 0.07, and 0.095 mm, load P acts on center of shaft)

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Figure 6

Angle γ of journal misalignment in bearing, maximum film pressure pmax, minimum film thickness hmin and average film temperature Tave on two sections of bearing against shaft load P (L=40mm,n=1500r∕min,c=0.045, 0.07, and 0.095 mm, load P acts on two sides of shaft)

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Figure 7

Angle γ of journal misalignment in bearing, maximum film pressure pmax, minimum film thickness hmin and average film temperature Tave on two sections of bearing against shaft load P (c=0.07mm,n=1500r∕min,L=30, 40, and 50 mm, load P acts on center of shaft)

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Figure 8

Angle γ of journal-bearing misalignment, maximum film pressure pmax, minimum film thickness hmin and average film temperature Tave on two sections of bearing plotted against shaft load P (c=0.07mm,n=1500r∕min,L=30, 40, and 50 mm, load P acts at two sides of shaft)

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Figure 9

Change of film pressure p and film thickness h on two sections of bearing at a cycle of shaft load P (rotating angle θ of eccentric weight is 0–360°, and θ=0° when P acts upwards), (c=0.07mm,L=40mm,n=1500r∕min, load P acts at shaft center and P=400, 1100, and 2050 N)

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Figure 10

Change of film pressure p and film thickness h on two sections of bearing during a cycle of shaft load P (rotating angle θ of eccentric weight is 0–360°, and θ=0° when P acts upwards), (c=0.07mm,L=40mm,n=1500r∕min, load P acts at both sides of shaft and P=400, 1100, and 2050 N)

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