Hydrodynamic air lubricated compliant surface bearing for an automotive gas turbine engine. I. Journal bearing performance | Zendy

D. Ruscitto | Zendy; J. McCormick | Zendy; Stanley Gray | Zendy

Open Access

Hydrodynamic air lubricated compliant surface bearing for an automotive gas turbine engine. I. Journal bearing performance

Author(s) -

D. Ruscitto,

J. McCormick,

Stanley Gray

Publication year - 1978

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/7095892

Subject(s) - bearing (navigation) , materials science , foil bearing , foil method , composite material , fluid bearing , bearing surface , porosity , gas turbines , mechanical engineering , lubrication , mechanics , physics , engineering , astronomy

A 38.1 mm diameter Hydresil Compliant Foil Bearing was designed and tested at room temperature and 315/sup 0/C. Test speeds of 60,000 rpm and loads of 1.75 x 10/sup 5/ N/m/sup 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 = /sup 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/sup 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.

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