Turbofan comprising a nacelle equipped with a reverser system and a mobile cascade grill

Patent metadata

Field	Value
Publication number	US-11255293-B2
Application number	US-202016832344-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Apr 4, 2019
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A turbofan with a secondary duct and including a fixed structure and a mobile assembly including a frame with openwork regions. The mobile assembly is translatable between advanced and extended positions. The openwork regions are positioned across the window in the extended position. A plurality of blocking doors is provided, each being mobile between stowed and deployed positions. An array of rams move the mobile assembly. A cascade grille mounts on the frame across the openwork region. The grille slides on the frame parallel to the translational direction. For each grille, a rear stop limits rearward movement, and a compression spring pushes the grille to the rear for abutment against a rear stop. For each grille, the fixed structure comprises a stop element against which the grille abuts upon movement from the advanced position to the extended position.

First claim

The invention claimed is:

1. A turbofan comprising a motor and a nacelle, surrounding the motor, and wherein a secondary duct for a secondary flow is delimited between the nacelle and the motor, the nacelle comprising:
a fan casing comprising an exterior wall,
a fixed assembly comprising a fixed structure forming an interior wall of the fan casing,
a mobile assembly comprising a mobile cowl and a frame having openwork regions to the front of the mobile cowl, the mobile assembly being mobile in translation relative to the fixed structure in a direction of translation between an advanced position in which the mobile assembly is positioned such that the mobile cowl is moved close to and extends the exterior wall, and an extended position in which the mobile assembly is positioned such that the mobile cowl is moved away to a rear of the exterior wall so as to open a window between the secondary duct and an exterior of the nacelle, wherein the openwork regions are positioned across the window in the extended position,
a plurality of blocking doors, wherein each blocking door is mounted to be mobile between a stowed position in which the blocking door is outside the secondary duct and a deployed position in which the blocking door extends across the secondary duct,
an array of rams configured to move the mobile assembly in translation from the advanced position to the extended position, and vice versa, wherein the extended position corresponds to an abutment of the rams,
at least one cascade grille mounted on the frame and arranged across the openwork region, wherein the at least one cascade grille is mounted to undergo a sliding movement on the frame parallel to the direction of translation,
for the at least one cascade grille, at least one front stop limiting the movement of the cascade grille to the front and at least one rear stop limiting the movement of the cascade grille to the rear,
for the at least one cascade grille, at least one compression spring that pushes back the cascade grille to the rear for abutment against the rear stop, and
for the at least one cascade grille, the fixed structure comprises at least one stop element against which the cascade grille abuts upon movement from the advanced position to the extended position, and wherein the at least one stop element is arranged to guarantee a functional clearance between the cascade grille and the at least one front stop, even when the mobile assembly reaches the extended position.

2. The turbofan as claimed in claim 1 , wherein the cascade grille comprises two front slides and two rear slides distributed at four corners of the cascade grille and mounted to slide on the frame, and wherein each slide is mounted to slide between a front stop arranged at a front relative to the slide and a rear stop arranged to a rear relative to the slide.

3. The turbofan as claimed in claim 2 , wherein a link between each slide and the frame is formed as a clevis, with U-walls which form the front stops and the rear stop of the respective slide.

4. The turbofan as claimed in claim 2 , wherein, for each front slide, the compression spring is arranged between the front stop and the front slide.

5. An aircraft comprising at least one turbofan as claimed in claim 1 .

Assignees

• Airbus Operations Sas

Inventors

• Gardes Pascal
• Ridray Frédéric
• Orteu Benoit
• Gougeon Pascal
• Piard Frédéric

Classifications

• F02K1/72 Primary

  the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow · CPC title

• B64D27/18 Primary

  within, or attached to, wings · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · CPC title

• B64D29/06

  Attaching of nacelles, fairings or cowlings · CPC title

• B64D29/02

  associated with wings · CPC title