Hydrodynamic Air Lubricated Compliant Surface Bearing for an Automotive Gas Turbine Engine. I. Journal Bearing Performance

摘要

A 38.1 mm diameter Hydresil Compliant Foil Bearing was designed and tested at room temperature and 315 exp 0 C. Test speeds of 60,000 rpm and loads of 1.75 x 10 exp 5 N/m exp 2 were obtained. A unique adaptation of capacitance proximity probes mounted in the rotating journal was utilized to directly measure the bearing film thickness. Test bearings with an L/D (length/diameter) = 1 and L/D = exp 1 / sub 2 were used and the experimental data are compared with predicted minimum film thickness values for an L/D = infinity bearing and the results presented as a series of curves. Experimental data were obtained at 315 exp 0 C which showed relatively low cooling air flow requirements to remove self-generated heat. The detrimental influence of porous journal surface coatings on bearing load performance was demonstrated. (ERA citation 03:053063)