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 language | English |
|---|---|
| Pages (from-to) | 349-364 |
| Number of pages | 16 |
| Journal | Tribology Letters |
| Volume | 50 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 1 2013 |
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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 journal › Article
}
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.
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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 -