LIGHTWEIGHT GEAR ASSEMBLY FOR EPICYCLIC GEARBOX
First Claim
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1. An epicyclic gearbox, comprising:
- a gearbox housing including an inner cavity receiving an input shaft from a low pressure turbine and an output shaft to a fan;
a sun gear disposed within said housing;
at least one planetary gear which engages and orbits said sun gear;
said at least one planetary gear being formed of a first material;
an insert disposed between a gear rim of said at least one planetary gear and a journal;
said insert being formed of a second material distinct from said first material and of a density which is less than said first material.
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Abstract
An epicyclic gearbox comprises a gearbox housing including an inner cavity receiving an input shaft from a low pressure turbine and an output shaft connected to a fan. A sun gear is disposed within the housing and at least one planetary gear engages and orbits the sun gear. The at least one planetary gear is formed of a first material and an insert is disposed between a gear rim of the at least one planetary gear and a journal. The insert is formed of a second material distinct from the first material and of a weight which is lighter than the first material. The gearbox may include but is not limited to both star gearbox and planetary gearbox configurations.
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Citations
15 Claims
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1. An epicyclic gearbox, comprising:
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a gearbox housing including an inner cavity receiving an input shaft from a low pressure turbine and an output shaft to a fan; a sun gear disposed within said housing; at least one planetary gear which engages and orbits said sun gear; said at least one planetary gear being formed of a first material; an insert disposed between a gear rim of said at least one planetary gear and a journal; said insert being formed of a second material distinct from said first material and of a density which is less than said first material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification