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Slider-bearing design with micro-machined wavy-cavity: Parametric Characterization of thermohydrodynamic-operation-scheme

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Abstract

Slider bearings are widely applied in mechanical systems, where the design needs cover increased load capacity, lowered friction and power consumption and creative designs. This work is governed to perform a parametric characterization, by generating a novel structure on the upper slider surface, which can formally be expressed in micro-machined wavy-form, where the individual and combined influences of various structural design parameters and boundary conditions, on the performance records, are also evaluated. Computations put forward that the contribution of the wave amplitude on power loss values is highly dependent on the level of inlet pressure; higher amplitudes are determined to increase power loss in the lowest inlet pressure case of 1.01, whereas the contrary outcome is determined in the higher inlet pressure cases of 3.01 & 5.01. Designing the slider bearing system, based on optimal load capacity, produced the optimum wave number ranges as 10–45, 7–11 and 5–8 for the pad inclinations of 5°, 4° and 3° respectively.

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Abbreviations

Cp :

Constant pressure specific heat, J/kgK

Ff :

Friction force, N

h:

Bearing height, m

k, b, ζ:

Viscosity parameters

L:

Bearing length, m

n:

Number of sequential cells

m:

Lubricant flow rate, kg/s

P:

Static pressure, Pa

qx :

Volumetric flow rate per unit width, m3/ms

T:

Temperature, K

u:

Flow velocity, m/s

V:

Surface velocities of bearing, m/s

W:

Load carrying capacity, N

x, y:

Cartesian coordinates, m

β:

Inlet to exit pressure ratio

Δ:

Rise

ε:

Error, %

φ:

Wave amplitude, μm

\(\gamma ,\bar \omega \) :

Coefficient matrices

λ:

Wave number

μ:

Dynamic viscosity, Pas

θ:

Mean pad inclination, degree

ρ:

Density, kg/m3

τ:

Shear stress, Pa

Ωloss :

Power loss, W

*:

non-dimensional

abs, rel:

Absolute, relative

cr:

Critical

i:

Node number

in, ex:

Inlet, exit

l, u:

Lower-upper surfaces

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Authors and Affiliations

  1. Department of Industrial Engineering, Uludag University, 16059, Gorukle Bursa, Turkey

    B. Turker Ozalp & A. Alper Ozalp

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  1. B. Turker Ozalp
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Correspondence to A. Alper Ozalp.

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Ozalp, B.T., Ozalp, A.A. Slider-bearing design with micro-machined wavy-cavity: Parametric Characterization of thermohydrodynamic-operation-scheme. J Mech Sci Technol 20, 1590–1606 (2006). https://doi.org/10.1007/BF02916263

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  • DOI: https://doi.org/10.1007/BF02916263

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