Reduced hydrodynamic bearing seal air cycle machine

Details Reduced hydrodynamic bearing seal air cycle machine Reduced hydrodynamic bearing seal air cycle machine

F - Mech Eng,Light,Heat,Weapons

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F01D 25/12 (2006.01) B64D 13/08 (2006.01) F01D 25/16 (2006.01) F04D 29/04 (2006.01) F04D 29/58 (2006.01) F16C 37/00 (2006.01)

Patent

CA 2057960

BEARING COOLING ARRANGEMENT FOR AIR CYCLE MACHINE ABSTRACT In air cycle machines with hydrodynamic bearings, the mass flow rate of coolant (363 passing through a series of bearings (32, 28, 30) is metered before the coolant passes through the final bearing (30). The final bearing operates at an internal pressure equivalent to that present in the region (72) into which coolant exhausts after exiting the final bearing. Since coolant in the final bearing is at the same pressure as air immediately downstream from the bearing, no rotating seal is required at the outlet of the bearing cooling flowpath. - 15 -

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