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Hydrodynamic Lubrication

A Laser Surface Textured Journal Bearing

[+] Author and Article Information
V. Brizmer1

SKF Engineering & Research Centre Kelvinbaan 16, 3439 MT Nieuwegein, The Netherlandsvictor.brizmer@skf.com

Y. Kligerman2

Department of Mechanical Engineering, Technion, Haifa 32000 Israelmermdyk@technion.ac.il

1

Present address: SKF ERC, Nieuwegein, Netherlands.

2

Corresponding author.

J. Tribol 134(3), 031702 (Jun 18, 2012) (9 pages) doi:10.1115/1.4006511 History: Received November 08, 2011; Revised March 16, 2012; Published June 18, 2012; Online June 18, 2012

The potential use of laser surface texturing (LST) in hydrodynamic journal bearings is examined theoretically. The regular surface texture has the form of micro-dimples with preselected diameter, depth, and area density. It can be applied to only a certain portion of the bearing perimeter (partial LST) or the full bearing perimeter (full LST). The effect of such a texture on load capacity and on the attitude angle of the journal bearing is investigated in the present work. The optimum parameters of the dimples and favorable LST mode for maximum load capacity have been found.

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Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of LST journal bearing

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Figure 2

The theoretical model of LST journal bearing in the Cartesian coordinates. The solution domain for the infinitely long journal bearing (i.e., one half of the dimple column) is denoted by the dotted rectangle.

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Figure 3

(a) Local coordinate system; (b) local depth of a dimple

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Figure 4

Short journal bearings (L/D = 0.2), nontextured versus fully textured: (a) the Sommerfeld number S, and (b) the attitude angle φ, versus the eccentricity ratio ψ

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Figure 5

The hydrodynamic pressure distribution in a nontextured short journal bearing at low eccentricity, in the middle cross-section (z = L/2). L = 5, D = 14.3, ψ = 0.05.

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Figure 6

The hydrodynamic pressure distribution in a fully textured short journal bearing at low eccentricity, in the middle cross-section (z = L/2). L = 5, D = 14.3, ψ = 0.05, δ = 0.05, ɛ = 0.06, Sp  = 13%

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Figure 7

Short journal bearing, L/D = 0.2, partially laser treated, with optimum ɛ/δ, θ1 and θ2 (see Table 1). (a) The Sommerfeld number and (b) the attitude angle versus dimple density at low eccentricity ratios (ψ≤0.3).

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Figure 8

Infinitely long journal bearing, partially laser treated, with optimum ɛ/δ, θ1 and θ2 (See Table 2). (a) Sommerfeld number and (b) attitude angle versus dimple density at low eccentricity ratios (ψ≤0.3).

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