Drive mechanism for a pair of contra-rotating propellers through an epicyclic gear train

Patent metadata

Field	Value
Publication number	US-8967950-B2
Application number	US-201013255389-A
Country	US
Kind code	B2
Filing date	Mar 9, 2010
Priority date	Mar 11, 2009
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A turbine driving a planet gear and an epicyclic gear train and including a planet pinion cage and a ring driving two propellers in rotation, is connected to the planet gear through a flexible sleeve surrounding a turbine support shaft rather than through a support shaft itself to achieve a flexible assembly with a limit stop position in contact with the shaft to limit parasite internal forces applied to the epicyclic gear train without tolerating a loose assembly or breakage of the sleeve due to a condition of the limit stop after a clearance has been eliminated.

First claim

The invention claimed is:

1. A mechanism comprising:
a pair of contra-rotating propellers;
a drive turbine;
a shaft connected to the turbine;
a static casing supporting the turbine through the shaft and two bearings, wherein the two bearings include a first bearing and a second bearing, said shaft extending in said first and second bearings, and said first and second bearings supporting said shaft;
a transmission including an epicyclic gear train including a central planet…

Assignees

• Charier Gilles Alain
• Gallet Francois
• Snecma

Inventors

• Charier Gilles Alain
• Gallet Francois

Classifications

• F02K3/072

  Mechanical Engineering · mapped topic

• F02C7/36

  Mechanical Engineering · mapped topic

• B64D35/06

  Operations & Transport · mapped topic

• F02C3/10

  Mechanical Engineering · mapped topic

• F05D2240/62

  Mechanical Engineering · mapped topic