REDUCTION GEARBOX FOR A GAS TURBINE ENGINE

摘要

The described reduction gearbox of a gas turbine engine includes a first gear reduction stage having an input gear adapted to be driven by a turbine output shaft. The input gear transfers power received from the turbine output shaft laterally away from the input gear to an input speed gear. Each input speed gear engages an output speed gear to define a main speed reduction gear set, and the main speed reduction gear sets are laterally spaced apart from one another to define a gap. The gearbox has a second gear reduction stage driven by the output speed gears, the second stage adapted to drive an engine output shaft.

主权项

1. A reduction gearbox for a gas turbine engine for reducing the rotational speed of a turbine output shaft and driving an engine output shaft, comprising a first gear reduction stage having an input gear adapted to be driven by the turbine output shaft about a longitudinal input axis, the input gear transferring power to drive laterally spaced apart input speed gears about at least one transversely extending gear axis, each said input speed gear engaging an output speed gear to form a main speed reduction gear set, each main speed reduction gear set being spaced laterally from the longitudinal input axis of the input gear on opposed sides thereof to define a transverse gap therebetween, the engaged input and output speed gears of the main speed reduction gear set performing a majority of the reduction in the rotational speed of the turbine output shaft.