Double row cylindrical roller bearing with high length-diameter roller

摘要

A planet gearbox is provided for connection to a carrier of an epicyclic gearing arrangement with a single input and single output and including a sun gear 80, a ring gear 86 and at least one double helix planet gear rotatable on a cylindrical roller bearing wherein the ratio of each cylindrical roller's length to each cylindrical roller's 104 diameter exceeds 1.0. A gas turbine engine 10 includes a shaft 36 coupling a compressor 22 of a compressor section to a turbine 30 of a turbine section. An epicyclic gearing arrangement has a single input from the shaft coupled to a sun gear, a single output from the carrier that is coupled to the shaft of a fan and includes a planet gearbox with cylindrical rollers having a length-to-diameter ratio exceeding 1.0.