Engine attachment system for an aircraft engine

Patent metadata

Field	Value
Publication number	US-10934009-B2
Application number	US-201816180129-A
Country	US
Kind code	B2
Filing date	Nov 5, 2018
Priority date	Nov 8, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

An engine attachment system comprising an engine pylon with a top wall, a bottom wall and two lateral walls, and a front engine attachment with a beam which bears two connecting rods for fixing the engine. The engine attachment system also comprises an intermediate piece with a bottom wall and four lateral walls, wherein the beam is fixed against an outer face of the bottom wall, wherein the intermediate piece is fitted at a front-end face of the engine pylon in such a way that an inner face of the bottom wall comes against the front-end face of the engine pylon, and in such a way that the lateral walls of the intermediate piece are superposed with the walls of the engine pylon. In such an engine attachment system, the front engine attachment is thus located on the front-end face of the engine pylon, allowing a space saving.

First claim

The invention claimed is:

1. An engine attachment system for an engine of an aircraft, the engine attachment system comprising:
an engine pylon comprising a top wall, a bottom wall and, on each side, a lateral wall, which together delimit a front-end face in a front part of the engine pylon, and
a front engine attachment comprising a beam to which is fixed, on either side of a median plane, a connecting rod, where each connecting rod is fixed in an articulated manner by a first end to the beam and is configured to be fixed in an articulated manner by a second end to the engine,
an intermediate piece which is formed as a cup with a bottom wall and four lateral walls which extend around the bottom wall,
the beam being fixed against an outer face of the bottom wall,
wherein the intermediate piece is fitted at the front-end face of the engine pylon in such a way that an inner face of the bottom wall comes against the front-end face of the engine pylon,
wherein a lateral wall of the intermediate piece comes to bear against a lateral wall of the engine pylon,
wherein another lateral wall of the intermediate piece comes to bear against another lateral wall of the engine pylon,
wherein another lateral wall of the intermediate piece comes to bear against the top wall of the engine pylon,
wherein another lateral wall of the intermediate piece comes to bear against the bottom wall of the engine pylon, and
wherein each lateral wall of the intermediate piece and an associated wall of the engine pylon are fixed to one another,

wherein each lateral wall of the engine pylon is formed as a U that is open towards the interior of the engine pylon and comprising a bottom which constitutes the lateral wall, a first turned edge which extends parallel to the top wall and a second turned edge which extends parallel to the bottom wall,
wherein the top wall is pressed on the outside against the lateral walls of the intermediate piece.

2. The engine attachment system according to claim 1 , wherein each lateral wall of the engine pylon is positioned between the lateral walls of the intermediate piece, and the bottom wall is pressed on the outside against the lateral walls of the intermediate piece.

3. The engine attachment system according to claim 1 , wherein each lateral wall of the engine pylon is positioned on an outside of the lateral walls of the intermediate piece, wherein the top wall is pressed on the outside against the lateral wall of the intermediate piece and the first turned edge, and wherein the bottom wall is pressed on the outside against the second turned edge.

4. The engine attachment system according to claim 1 , wherein each connecting rod, the beam and the intermediate piece together define a primary path for forces between the engine and the engine pylon to withstand loads of the engine, and wherein, there comprises for each connecting rod, a waiting fail-safe fixing point activated in case of failure of the primary path for forces and which creates an auxiliary path for forces between the engine and the engine pylon, and wherein the two waiting fail-safe fixing points are disposed on either side of the median plane.

5. The engine attachment system according to claim 4 , wherein each waiting fail-safe fixing point comprises a yoke joint produced in the engine and an axis fitted into said yoke joint and which passes through a bore of the beam whose diameter is greater than a diameter of the axis.

6. An aircraft comprising a structure, an engine and an engine attachment system according to claim 1 , wherein the engine pylon is fixed to the structure, and wherein a front part of the engine is fixed to said second ends of the connecting rods.

Assignees

• Airbus Operations Sas

Inventors

• Combes Stéphane
• Geliot Jean
• Deforet Thomas
• Soulie Adeline
• Orteu Benoit

Classifications

• B64D27/404 Primary

  Suspension arrangements specially adapted for supporting vertical loads · CPC title

• B64D2027/266

  Operations & Transport · mapped topic

• B64D27/26 Primary

  Operations & Transport · mapped topic

• B64D2027/268

  Operations & Transport · mapped topic

• B64D27/406

  Suspension arrangements specially adapted for supporting thrust loads, e.g. thrust links · CPC title