Investigations on the thermal effects in non-circular journal bearings

Abstract A comparative study based on the thermal performance of elliptical and offset-halves journal bearings has been carried out by solving energy equation while assuming Parabolic Temperature Profile Approximation across the fluid film for faster computation of temperatures. Investigation for the rise in oil film temperatures, thermal pressures, load capacity, and power loss for three commercially available grade oils have been carried out for bearing configurations under study. It has been found that the offset-halves journal bearing runs cooler when compared with elliptical journal bearing profile with minimum power loss and good load capacity using Oil 2 as lubricant for which minimum thermal degradation has been observed.

[1]  B. C. Majumdar,et al.  Computer-aided design of hydrodynamic journal bearings considering thermal effects , 2005 .

[2]  Ronald D. Flack,et al.  Temperature, pressure and film thickness measurements for an offset half bearing , 1987 .

[3]  R. Sinhasan,et al.  Finite element analysis of elliptical bearings lubricated by a non-newtonian fluid , 1982 .

[4]  R. Sinhasan,et al.  Elastothermohydrodynamic effects in elliptical bearings , 1989 .

[5]  N. P. Mehta,et al.  Stability Analysis of Finite Offset-Halves Pressure Dam Bearing , 1986 .

[6]  Raj K. Pandey,et al.  An Investigation into the Validity of the Temperature Profile Approximations across the Film Thickness in THD Analysis of Infinitely Wide Slider Bearing , 2006 .

[7]  Rakesh Sehgal,et al.  A comparative study of the thermal behaviour of circular and non-circular journal bearings , 2000 .

[8]  W. A. Crosby.  Thermal considerations in the solution of finite journal bearings , 1980 .

[9]  C. M. Taylor,et al.  An experimental investigation of thermal effects in circular and elliptical plain journal bearings , 1996 .

[10]  Jean Frene,et al.  Cavitation in dynamically loaded journal bearings using mobility method , 1996 .

[11]  Ajeet Singh,et al.  Stability analysis of orthogonally displaced bearings , 1984 .

[12]  K. Athre,et al.  Temperature profile of an elliptic bore journal bearing , 2007 .

[13]  Amit Chauhan,et al.  Thermohydrodynamic analysis of elliptical journal bearing with different grade oils , 2010 .

[14]  K. Mistry,et al.  Thermal Analysis of Noncircular Bearings , 1996 .

[15]  Ajeet Singh,et al.  Stability limits of elliptical journal bearings supporting flexible rotors , 1982 .