Propulsion unit including lifting points disposed on thrust reverser cylinder supports

Patent metadata

Field	Value
Publication number	US-11300076-B2
Application number	US-202016998720-A
Country	US
Kind code	B2
Filing date	Aug 20, 2020
Priority date	Feb 20, 2018
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A propulsion unit includes a nacelle, a turbojet engine, and a thrust reverser having gratings provided with movable thrust reversal gratings arranged around an annular duct for fresh air from the turbojet engine. The propulsion unit further includes actuators arranged around the annular duct and each actuator has a front end attached to the turbojet engine and a rear end which translates movable rear covers and gratings for opening, in the annular duct, radial passages which receive said gratings. The propulsion unit further has lifting points that are arranged around the annular duct for lifting the turbojet engine. At least one of the lifting points is formed on a beam for attaching an front end of an actuator.

First claim

What is claimed is:

1. A propulsion unit comprising:
a nacelle comprising moveable rear cowls;
a bypass turbojet engine comprising lifting points;
a cascade thrust reverser equipped with movable thrust reverser cascades disposed around an annular flow path of fresh air of the bypass turbojet engine; and
a plurality of cylinders disposed around the annular flow path, wherein each of the cylinders has a front end fastened to the bypass turbojet engine and a rear end that drives, in translation, the movable rear cowls and cascades to open, in the annular flow path, radial passages receiving the cascades, wherein:
the lifting points of the bypass turbojet engine are disposed around the annular flow path of fresh air of the turbojet engine, and
at least one of the lifting points is formed on a fitting for fastening the front end of the cylinders to the bypass turbojet engine.

2. The propulsion unit according to claim 1 , wherein for a cylinder from among the plurality of cylinders, the at least one lifting point includes, on each side of the cylinder, at least one fastening interface formed on the fitting to mount a handling and hoisting tooling.

3. The propulsion unit according to claim 2 , wherein the at least one fastening interface has a flat surface extending tangentially relative to an axis of the nacelle and defines bores for fastening a handling interface.

4. The propulsion unit according to claim 2 , wherein the fitting for fastening the front end of the cylinder comprises:
a central portion securely connected to a shell of a motor casing disposed downstream of a fan casing of the turbojet engine, wherein the front end of the cylinder is fastened to the central portion, and
lateral portions secured to the central portion, wherein each of the lateral portions includes the at least one fastening interface.

5. The propulsion unit according to claim 4 , wherein the central portion of the fitting is fastened to a frame forming a flange fastened to the shell of the motor casing.

6. The propulsion unit according to claim 4 , wherein the motor casing is constituted by an outer shell of an intermediate casing, wherein the outer shell of the intermediate casing comprises blades for straightening the flow of the annular flow path of fresh air of the turbojet engine.

7. The propulsion unit according to claim 4 , wherein the central portion of the fitting is further fastened to the fan casing.

8. The propulsion unit according to claim 1 , wherein the nacelle embeds, on each of two lateral sides thereof, a lifting point disposed on a cylinder fitting, the cylinder fitting being mounted on a right or left upper quadrant of the nacelle.

9. The propulsion unit according to claim 1 , wherein each fastening point of the cylinder is disposed behind a hatch formed on a cowl of the nacelle.

Assignees

• Safran Nacelles
• Safran Aircraft Engines

Inventors

• Boileau Patrick
• Garnaud Quentin
• Hellegouarch Antoine Elie
• Ferrier Gina

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

• F01D25/28 Primary

  Supporting or mounting arrangements, e.g. for turbine casing · CPC title

• B64D27/40

  Arrangements for mounting power plants in aircraft · CPC title

• B64C7/02

  Nacelles · CPC title

• F02C7/20

  Mounting or supporting of plant; Accommodating heat expansion or creep · CPC title