Suspension structure for suspending a turboprop having two unducted propellers from a structural element of an aircraft with rigid fastening of the air intake structure

Patent metadata

Field	Value
Publication number	US-2016376016-A1
Application number	US-201515110670-A
Country	US
Kind code	A1
Filing date	Jan 7, 2015
Priority date	Jan 10, 2014
Publication date	Dec 29, 2016
Grant date	—

Abstract

A suspension structure for suspending a turboprop including two unducted propellers from a structural element of an aircraft, the structure including a suspension frame for fastening to a structural element of the aircraft and including a main beam extending parallel to a longitudinal axis of the turboprop, the suspension frame being fastened to an air intake structure of the turboprop by an attachment frame.

First claim

1 - 10 . (canceled)

11 . A suspension structure for suspending a turboprop including two unducted propellers from a structural element of an aircraft via an attachment pylon, the structure comprising:
a suspension frame for fastening to an extremity of the attachment pylon of the aircraft and including a main beam extending parallel to a longitudinal axis of the turboprop, the suspension frame being rigidly fastened to an air intake structure of the turboprop by an attachment frame, the attachment frame including two longitudinal arms connected together firstly by a front frame rigidly fastened to the air intake structure of the turboprop with a degree of freedom for adjustment in a plane that is transverse relative to the longitudinal axis of the turboprop, and secondly by a rear frame fitted into the suspension frame.

12 . A structure according to claim 11 , wherein the suppression frame further includes two lateral beams fastened to the main beam, each of the lateral beams being triangular in shape such that the suspension frame presents a V-shaped structure.

13 . A structure according to claim 12 , wherein each of the two lateral beams includes at its free end opposite to the attachment frame a fastening to rigidly fasten the suspension frame.

14 . A structure according to claim 11 , wherein the attachment frame is fastened to the air intake structure of the turboprop by bolt fasteners passing through holes of oblong shape formed in the attachment frame to impart the degree of freedom for adjustment in a plane that is transverse relative to the longitudinal axis of the turboprop to the connection between the attachment frame and the air intake structure.

15 . A structure according to claim 11 , wherein the attachment frame is configured to allow passing of pipework of the turboprop to the attachment pylon.

16 . A structure according to claim 11 , wherein a connection between the attachment frame and the air intake structure of the turboprop includes at least one sliding pivot connection enabling the air intake structure to be opened.

17 . A structure according to claim 16 , wherein the air intake structure of the turboprop includes two lugs, each co-operating with a pin secured to the attachment frame to form two sliding pivot connections.

18 . A structure according to claim 16 , further comprising a closure catch between the air intake structure of the turboprop and a stationary fan cover of the turboprop to avoid untimely opening of the air intake structure.

19 . A structure according to claim 18 , wherein the closure catch and the sliding pivot connection are diametrically opposite.

20 . A structure according to claim 11 , wherein the suspension frame further includes two thrust take-up rods for connecting a main beam to an engine casing, and a downstream suspension rod and an upstream suspension rod for connecting the two ends of the suspension frame to the engine casing.

Assignees

• Snecma

Inventors

• Poisson Mathieu Ange
• Bellabal Francois Robert
• Florent Nicolas

Classifications

• B64D27/404

  Suspension arrangements specially adapted for supporting vertical loads · CPC title

• B64D33/02 Primary

  of combustion air intakes · CPC title

• B64D2027/005

  Aircraft with an unducted turbofan comprising contra-rotating rotors, e.g. contra-rotating open rotors [CROR] · CPC title

• B64D27/26 Primary

  Operations & Transport · mapped topic

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title