Composite material turbine wheel

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 5/34 (2006.01) F01D 5/02 (2006.01) F01D 5/14 (2006.01) F01D 5/28 (2006.01) F16D 1/076 (2006.01)

Patent

CA 2052436

The wheel (10), which is made from a composite material having a ceramic matrix comprises a hub that bears a drive gear (16) formed of teeth (20) that extend radially on one of the wheel's surfaces (10a). Each tooth is asymmetrical with respect to a meridian plane (21) that passes through its apex, and has a first shoulder (20b) that subtends an angle a, preferably between 15 and 45°, relative to that plane, and a second shoulder (20c) that subtends an angle b preferably between 55 and 85°, relative to that plane. Advantageously, the sum of the two angles is at least equal to 100°. By this configuration, the turbine wheel has an improved resistance against inter-laminar shear stresses that result from tightening to a drive gearwheel.

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