GEARBOX AND TURBINE ENGINE WITH GEARED FAN

摘要

A gearbox (10) includes: a carrier (16) having a central axis and forward and aft walls with respective forward an aft coaxial bores; a pin received in the bores, and secured against axial movement; an inner race mounted on the pin between the forward and aft ends, and secured against axial movement relative to the carrier (16); a planet gear mounted for rotation about the pin, wherein a cylindrical interior surface of the planet gear defines an outer race surrounding the rollers, wherein either the inner race or the interior surface of the planet gear defines at least two axially-spaced apart annular raceways; a plurality of generally cylindrical rollers made of a ceramic material disposed in each of the raceways, between the inner and outer races; a sun gear mounted for rotation about the central axis and engaged with the planet gear; and a ring gear engaged with the planet gear.