Balancing Wedge Action: A Contribution of Textured Surface to Hydrodynamic Pressure Generation

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

This paper suggests a new mechanism called 'balancing wedge action', which is based on the hydrodynamic lubrication theory for textured surfaces. While past studies have considered the local wedge film action produced by textured feature, this new mechanism is based on the promotion of a wedge film action between surfaces by the incorporation of a textured feature. The analytical model used in the current study is a one-dimensional centrally pivoted pad bearing having a single dimple on the pad, which considers the equilibrium of the moment applied to the surfaces. Analytical equations are derived for the pressure, shear stress, load, friction, and moment by integrating the Reynolds equation. A series of parametric simulations of the depth, width, and location of a dimple were conducted. The analytical results showed that the incorporation of a single dimple on the pad surface increases the convergence ratio between the surfaces, producing a load capacity and reducing the friction. No negative pressure can be found within the dimple, where a positive pressure with a greater positive gradient causes a higher shear stress than that outside the dimple. The trends for the load and friction in relation to the dimple depth and location are complex. The creation of the dimple closer to the centre results in a failure to obtain an equilibrium solution for the moment.

Original languageEnglish
Pages (from-to)349-364
Number of pages16
JournalTribology Letters
Volume50
Issue number3
DOIs
Publication statusPublished - Jun 1 2013

Fingerprint

wedges
Hydrodynamics
hydrodynamics
Bearing pads
friction
Friction
moments
shear stress
Shear stress
Reynolds equation
promotion
lubrication
Lubrication
Analytical models
Loads (forces)
trends
gradients
causes
simulation

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Balancing Wedge Action : A Contribution of Textured Surface to Hydrodynamic Pressure Generation. / Yagi, Kazuyuki; Sugimura, Joichi.

In: Tribology Letters, Vol. 50, No. 3, 01.06.2013, p. 349-364.

Research output: Contribution to journalArticle

@article{22f189868f934529a96cb7097fab4e6c,
title = "Balancing Wedge Action: A Contribution of Textured Surface to Hydrodynamic Pressure Generation",
abstract = "This paper suggests a new mechanism called 'balancing wedge action', which is based on the hydrodynamic lubrication theory for textured surfaces. While past studies have considered the local wedge film action produced by textured feature, this new mechanism is based on the promotion of a wedge film action between surfaces by the incorporation of a textured feature. The analytical model used in the current study is a one-dimensional centrally pivoted pad bearing having a single dimple on the pad, which considers the equilibrium of the moment applied to the surfaces. Analytical equations are derived for the pressure, shear stress, load, friction, and moment by integrating the Reynolds equation. A series of parametric simulations of the depth, width, and location of a dimple were conducted. The analytical results showed that the incorporation of a single dimple on the pad surface increases the convergence ratio between the surfaces, producing a load capacity and reducing the friction. No negative pressure can be found within the dimple, where a positive pressure with a greater positive gradient causes a higher shear stress than that outside the dimple. The trends for the load and friction in relation to the dimple depth and location are complex. The creation of the dimple closer to the centre results in a failure to obtain an equilibrium solution for the moment.",
author = "Kazuyuki Yagi and Joichi Sugimura",
year = "2013",
month = "6",
day = "1",
doi = "10.1007/s11249-013-0132-z",
language = "English",
volume = "50",
pages = "349--364",
journal = "Tribology Letters",
issn = "1023-8883",
publisher = "Springer New York",
number = "3",

}

TY - JOUR

T1 - Balancing Wedge Action

T2 - A Contribution of Textured Surface to Hydrodynamic Pressure Generation

AU - Yagi, Kazuyuki

AU - Sugimura, Joichi

PY - 2013/6/1

Y1 - 2013/6/1

N2 - This paper suggests a new mechanism called 'balancing wedge action', which is based on the hydrodynamic lubrication theory for textured surfaces. While past studies have considered the local wedge film action produced by textured feature, this new mechanism is based on the promotion of a wedge film action between surfaces by the incorporation of a textured feature. The analytical model used in the current study is a one-dimensional centrally pivoted pad bearing having a single dimple on the pad, which considers the equilibrium of the moment applied to the surfaces. Analytical equations are derived for the pressure, shear stress, load, friction, and moment by integrating the Reynolds equation. A series of parametric simulations of the depth, width, and location of a dimple were conducted. The analytical results showed that the incorporation of a single dimple on the pad surface increases the convergence ratio between the surfaces, producing a load capacity and reducing the friction. No negative pressure can be found within the dimple, where a positive pressure with a greater positive gradient causes a higher shear stress than that outside the dimple. The trends for the load and friction in relation to the dimple depth and location are complex. The creation of the dimple closer to the centre results in a failure to obtain an equilibrium solution for the moment.

AB - This paper suggests a new mechanism called 'balancing wedge action', which is based on the hydrodynamic lubrication theory for textured surfaces. While past studies have considered the local wedge film action produced by textured feature, this new mechanism is based on the promotion of a wedge film action between surfaces by the incorporation of a textured feature. The analytical model used in the current study is a one-dimensional centrally pivoted pad bearing having a single dimple on the pad, which considers the equilibrium of the moment applied to the surfaces. Analytical equations are derived for the pressure, shear stress, load, friction, and moment by integrating the Reynolds equation. A series of parametric simulations of the depth, width, and location of a dimple were conducted. The analytical results showed that the incorporation of a single dimple on the pad surface increases the convergence ratio between the surfaces, producing a load capacity and reducing the friction. No negative pressure can be found within the dimple, where a positive pressure with a greater positive gradient causes a higher shear stress than that outside the dimple. The trends for the load and friction in relation to the dimple depth and location are complex. The creation of the dimple closer to the centre results in a failure to obtain an equilibrium solution for the moment.

UR - http://www.scopus.com/inward/record.url?scp=84878223501&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84878223501&partnerID=8YFLogxK

U2 - 10.1007/s11249-013-0132-z

DO - 10.1007/s11249-013-0132-z

M3 - Article

AN - SCOPUS:84878223501

VL - 50

SP - 349

EP - 364

JO - Tribology Letters

JF - Tribology Letters

SN - 1023-8883

IS - 3

ER -