Calculation of High Speed Multilobe Journal Bearings Available to Purchase

The bearing systems of turbocompressors, compressors and turbine gear trains consist the multilobe journal bearings. In these bearings, high speed of journal causes, that the oil film of bearing is not laminar but turbulent one. Turbulent oil film affects the bearing operating characteristics. Calculations in this case can not be carried-out on the condition of laminar oil film but on the assumption of turbulent one. The paper introduces theoretical calculations of the high speed multilobe journal bearing affected by turbulent oil film. For the 4-lobe journal bearing the different values of lobe clearance ratio and relative length of the bearing were assumed. The Reynolds, energy and viscosity equations were solved numerically on the assumption of incompressible lubricant and the turbulent adiabatic flow of oil in the bearing gap.