Mechanical transmission device for driving in rotation counter-rotating propellers of a dual-propeller turboprop

摘要

A mechanical transmission device to driving in rotation counter-rotating propellers of a dual-propeller turboprop, including: an epicyclic gear train having a sun gear carried on a sun gear shaft centered on a longitudinal axis and which is connected upstream to a turbine rotor of the turboprop driven in rotation; at least one planet gear meshing with the sun gear; a planet gear carrier carrying the planet gear free to rotate and which is carried by a planet carrier shaft connected downstream to a first set of propellers to drive it in rotation; and a ring gear meshing with the planet gear and which is carried on a ring gear shaft connected downstream to a second set of propellers to drive it in rotation, is disclosed.

主权项

1. A mechanical transmission device for driving in rotation counter-rotating propellers of a dual-propeller turboprop, including an epicyclic gear train comprising:
a sun gear carried by a sun gear shaft which is centered on the longitudinal axis of the turboprop and which is designed to be connected upstream to a rotor of a turbine of the turboprop to be driven in rotation; at least one planet gear meshing with the sun gear; a planet carrier carrying, free to rotate, the planet gear and which is carried by a planet carrier shaft designed to be connected downstream to a first set of propellers to drive the first set of propellers in rotation; and a ring gear meshing with the satellite and which is carried on a ring gear shaft designed to be connected downstream to a second set of propellers to drive the second set of propellers in rotation; wherein the sun gear shaft includes an upstream end provided with an upstream web extending radially outward, and a downstream end opposite the upstream end and provided with a downstream web formed downstream of the epicyclic gear train and extending radially outward.