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Hydrodynamic Lubrication

Hydrodynamic Lubrication of Conformal Contacting Surfaces With Parabolic Grooves

[+] Author and Article Information
Yonghong Fu

 School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. C.

Jinghu Ji1

 School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. C.andyjee@163.com

Qinsheng Bi

 Faculty of Science, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. C.

1

Corresponding author.

J. Tribol 134(1), 011701 (Feb 09, 2012) (9 pages) doi:10.1115/1.4005518 History: Received May 22, 2011; Revised November 30, 2011; Published February 08, 2012; Online February 09, 2012

The effect of surface texturing in the form of parabolic grooves on the hydrodynamic lubrication properties is investigated in this paper. Numerical simulation of the pressure distribution of lubricant between a textured slider and a smooth, moving slider has been performed. The evaluation criterion of hydrodynamic effect of dimensionless average pressure is calculated and presented with the variation of minimum film thickness, groove width, groove depth, spacing and orientation angle. Optimum values of geometrical parameters such as the dimensionless groove depth, spacing and orientation angle are obtained which correspond to maximum average pressure. It is also noted that the average pressure increases monotonically with increasing groove width. The results show that the hydrodynamic effect can be improved by employing optimized surface texturing design.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Parallel sliders model

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Figure 2

Geometry of slider surface texturing, (a) parabolic grooves distribution on a slider surface; (b) cross-section geometry of the grooves in a textured slider along the direction of A-A

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Figure 3

A multi-grid W-cycle for M = 4

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Figure 4

(a) The dimensionless film thickness distribution; (b) dimensionless pressure distribution; (c) dimensionless film thickness and pressure along X-direction at Y = 25; (d) dimensionless film thickness and pressure along Y-direction at X = 25 (θ = 30°)

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Figure 5

(a) The dimensionless film thickness distribution; (b) dimensionless pressure distribution; (c) dimensionless film thickness and pressure along X-direction at Y = 25; (d) dimensionless film thickness and pressure along Y-direction at X = 25 (θ = 45°)

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Figure 6

(a) The dimensionless film thickness distribution; (b) dimensionless pressure distribution; (c) dimensionless film thickness and pressure along X-direction at Y = 25; (d) dimensionless film thickness and pressure along Y-direction at X = 25 (θ = 60°)

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Figure 7

Dimensionless average pressure, Pav  , versus dimensionless slider length, L (H0  = 0.1, Wg =2, Sg  = 4, θ = 45°)

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Figure 8

Dimensionless average pressure, Pav  , versus dimensionless minimum film thickness, H0 , for various values of groove depth, Hg . (H0  = 0.1, Wg =2, Sg  = 4, θ = 45°)

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Figure 9

Dimensionless average pressure, Pav  , versus dimensionless groove depth, Hg , for various values of groove width, Wg (H0  = 0.1, Sg  = 4, θ = 45°)

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Figure 10

Dimensionless average pressure, Pav  , versus dimensionless groove depth, Hg , for various values of spacing, Sg and orientation angle, θ (H0  = 0.1, Wg  = 2, θ = 45°)

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Figure 12

Dimensionless average pressure, Pav  , versus dimensionless spacing, Sg , for various values of groove width, Wg (H0  = 0.1, Hg  = 0.06, θ = 45°)

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Figure 11

Dimensionless average pressure, Pav  , versus dimensionless groove width, Wg , for various values of orientation angle, θ (H0  = 0.1, Hg  = 0.06, Sg  = 4)

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