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US 2015/0176431 A1Published application
Double frangible bearing support
AssigneePratt & Whitney Canada Corp.
InventorsLENA RAYKOWSKI, HARVEY SMAILYS, DAVE BEAMISH
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AssigneePratt & Whitney Canada Corp.
InventorsLENA RAYKOWSKI, HARVEY SMAILYS, DAVE BEAMISH
Estimating the term…
A double frangible bearing support structure supports a low pressure rotor of an aircraft engine. The support structure has a first bearing assembly including a first bearing supported by a first bearing support adapted to buckle or frange when subject to a predetermined critical load resulting from an abnormal rotor imbalance. The support structure has a second bearing assembly comprising a second bearing having rolling elements disposed between inner and outer races. The outer race is connected to a second bearing support by means of frangible bolts adapted to fail when subject to a predetermined critical load resulting from radial displacements and loads of the low pressure rotor following decoupling/franging at the first bearing support.
A turbofan gas turbine engine comprising a rotor including a shaft coupled to a propulsive fan, a plurality of axially spaced-apart bearing assemblies supporting the shaft on a stator structure of the engine, the plurality of bearing assemblies including a first bearing assembly adjacent the rotor, a second bearing assembly adjacent to and spaced apart from the first bearing assembly, and at least a third bearing assembly supporting an aft portion of the shaft, the first bearing assembly including a first bearing supported by a fusible conical support structure, the second bearing assembly including a second bearing having rolling elements disposed between inner and outer races, the inner race being affixed to the shaft, the outer race being connected to a second bearing support by frangible bolts.
A double frangible bearing support structure for supporting low pressure rotor of an aircraft engine, the low pressure rotor including a fan and a low pressure shaft, the support structure comprising:
Dependencies are inferred from the claim text.