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A GEAR, A METHOD OF MANUFACTURING A GEAR AND A GEARED GAS TURBINE ENGINE

A gas turbine engine (10) comprises a gearbox (28) comprising a sun gear (30), an annulus gear (32), a plurality of planet gears (34) and a carrier (36). The sun gear (30) meshes with the planet gears (34) and the planet gears (34) mesh with the annulus gear (32). A planet gear (34) comprises a first annular structure (44), a plurality of teeth (46) extending radially from the first annular structure (44) and a second annular structure abutting and secured to a cylindrical surface (45) of the first annular structure (44). The first annular structure (44) and the teeth (46) consist of steel, the second annular structure (48) comprises a metal matrix composite, the metal matrix (50) comprising aluminium, aluminium alloy, steel, titanium or titanium alloy, the reinforcing material (52) comprising titanium diboride, titanium carbide or titanium nitride. The second annular structure (48) reduces the mass but maintains, or increases, the stiffness of the planet gear (34) to carry centrifugal loads and to maintain roundness of the planet gears (34).


» Number: CA2998700A1 (A1)

» Publication Date: 18//2/13/1

» Applicant: ROLLS ROYCE PLC?[GB]

» Inventor: CLARKE DEREK WJ?[GB]

» More Information

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [609203].

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