Research Papers: Hydrodynamic Lubrication

Influence of Geometric Shapes on the Hydrodynamic Lubrication of a Partially Textured Slider With Micro-Grooves

[+] Author and Article Information
Jinghu Ji

School of Mechanical Engineering,
Jiangsu University,
Jiangsu 212013, China
e-mail: andyjee@163.com

Yonghong Fu

School of Mechanical Engineering,
Jiangsu University,
Jiangsu 212013, China

Qinsheng Bi

Faculty of Civil Engineering and Mechanics,
Jiangsu University,
Jiangsu 212013, China

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 1, 2012; final manuscript received April 9, 2014; published online June 6, 2014. Assoc. Editor: C. Fred Higgs, III.

J. Tribol 136(4), 041702 (Jun 06, 2014) (8 pages) Paper No: TRIB-12-1001; doi: 10.1115/1.4027633 History: Received January 01, 2012; Revised April 09, 2014

The effect of partial surface texturing in the form of parabolic grooves, rectangular grooves, and triangular grooves on the hydrodynamic pressure is investigated in the present work. The dimensionless hydrodynamic pressure generated by the partial surface texturing is obtained by the multigrid method. The effect of the texturing parameters on the dimensionless average pressure is analyzed for a given set of operating parameters. The results indicate that the geometric shape, area density, groove depth, and orientation of the grooves have an obvious influence on the hydrodynamic pressure. However, the groove width has little effect on the dimensionless average pressure. The results of the present work demonstrate that surface texturing design is very important to generate additional hydrodynamic pressure according to the operating parameters of the mechanical components.

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Fig. 2

A geometrical model of a partially textured surface: (a) grooves distribution, (b) cross section geometry of the parabolic grooves along the direction of A-A, (c) cross section geometry of the triangular grooves along the direction of A-A, and (d) cross section of the rectangular grooves along the direction of A-A

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Fig. 3

A multigrid W-cycle for M = 4

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Fig. 4

Rectangular unit of grooves

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Fig. 5

(a) Pressure distribution for the parabolic grooves, θ = 0, (b) pressure distribution for the parabolic grooves, θ = 45 deg, (c) pressure distribution for the rectangular grooves, θ = 45 deg, and (d) pressure distribution for the triangular grooves, θ = 45 deg (Wg = 1, Hg = 1, γ = 0.6)

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Fig. 6

Dimensionless average pressure Pav versus orientation angle θ (Wg = 1, Hg = 1, Sp = 0.5, γ = 0.6)

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Fig. 7

Dimensionless average pressure Pav versus area density Sp (Wg = 1, Hg = 1, θ = 0, γ = 0.6)

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Fig. 8

Dimensionless average pressure Pav versus dimensionless groove depth Hg (Wg = 1, Sp = 0.5, θ = 0, γ = 0.6)

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Fig. 9

Dimensionless average pressure Pav versus dimensionless groove width Wg (Hg = 1, Sp = 0.5, θ = 0, γ = 0.6)

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Fig. 10

Dimensionless average pressure Pav versus textured fraction γ (Wg = 1, Hg = 1, Sp = 0.5, θ = 0)



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