Theoretical and experimental analysis of a partially textured thrust bearing with square dimples

Abstract Surface texturing has proved to be very efficient in full and mixed lubrication, reducing the friction coefficient and the wear rate of mating surfaces. By partially texturing the inlet zone of a thrust washer pad load carrying capacity is generated in the system. In the present paper, a partially textured thrust bearing with square dimples is analysed theoretically using a thermohydrodynamic model. The equations are solved numerically by the finite-difference method. The bearing was realized by the photolithographic method and the theoretical results (fluid film thickness and friction torque) were compared with the experimental data obtained on the test rig. It is found that an optimal number of 12 sectors maximize the load carrying capacity of the bearing. The optimal textured fraction, which maximizes the load carrying capacity is 0.5 on the circumferential direction and 0.9-1 on the radial direction. A good correlation was found between the theoretical and experimental results for the two measured parameters (fluid film thickness and friction torque).

[1]  Izhak Etsion,et al.  A Laser Surface Textured Parallel Thrust Bearing , 2003 .

[2]  Yoshiteru Yasuda,et al.  Effect of surface texturing on friction reduction between ceramic and steel materials under lubricated sliding contact , 2003 .

[3]  I. Etsion,et al.  Experimental Investigation of Partial Laser Surface Texturing for Piston-Ring Friction Reduction , 2005 .

[4]  Kôji Katô,et al.  Loads carrying capacity map for the surface texture design of SiC thrust bearing sliding in water , 2003 .

[5]  Izhak Etsion,et al.  The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact. , 2005 .

[6]  Lyndon Scott Stephens,et al.  Effect of Deterministic Asperity Geometry on Hydrodynamic Lubrication , 2004 .

[7]  Izhak Etsion,et al.  Experimental Investigation of Laser Surface Textured Parallel Thrust Bearings , 2004 .

[8]  I. Etsion,et al.  Improving Tribological Performance of Piston Rings by Partial Surface Texturing , 2005 .

[9]  Oscar Pinkus,et al.  Centrifugal Effects in Thrust Bearings and Seals Under Laminar Conditions , 1981 .

[10]  Roland Larsson,et al.  Two-Dimensional CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication , 2005 .

[11]  Koshi Adachi,et al.  Running-in effect on the load-carrying capacity of a water-lubricated SiC thrust bearing , 2005 .

[12]  Staffan Jacobson,et al.  Influence of surface texture on boundary lubricated sliding contacts , 2003 .

[13]  I. Etsion,et al.  A Laser Surface Textured Hydrostatic Mechanical Seal , 2002 .