ENGINE ASSEMBLY FOR AN AIRCRAFT COMPRISING A PRIMARY STRUCTURE OF A MOUNTING PYLON EQUIPPED WITH A BOX EXTENSION COMPRISING TWO PARTS IN THE OVERALL SHAPE OF AN ARCH

摘要

An engine assembly for an aircraft rigid structure comprising a mounting pylon comprising a central box and a box extension connected to a reducing gear case of the turboreactor. The box extension includes two parts bearing the front engine attachments, these pieces each comprising a structure forming a reinforcing rib of the central box, as well as two parts of horseshoe shape surrounding the reducing gear case.

主权项

1. An engine assembly for an aircraft comprising:
a turbofan turbine engine having a fan which is driven by a reduction gear, the turbine engine comprising a reducing-gear case surrounding the reduction gear; a turbine engine mounting pylon, comprising a primary structure equipped with a central box; and an attachment mechanism to attach the turbine engine to the primary structure of the mounting pylon, wherein the primary structure of the mounting pylon also comprises a box extension connected to a front of the central box, the box extension comprising:
a first component produced as a single piece and arranged in a vertical and transverse plane of the engine assembly, the first component comprising a first part in the overall shape of an arch extending around the reducing-gear case, and a first connecting structure constituting a transverse stiffening rib of the central box, the first part in the overall shape of an arch having two first opposite ends; anda second component produced as a single piece and comprising a second part in the overall shape of an arch extending at least partly around the reducing-gear case, and a second connecting structure constituting an interior transverse stiffening rib of the central box, the second part in the overall shape of an arch having two second opposite ends respectively mounted on the two first opposite ends, the second part in the overall shape of an arch extending rearward and toward the central box from its second opposite ends, andwherein the attachment mechanism comprises two lateral front attachments and a central front attachment, each of the two lateral front attachments connecting the reducing-gear case to one of the two first ends of the first part in the overall shape of an arch and each reacting load in a longitudinal direction and in a vertical direction of the engine assembly, and the central front attachment connecting the reducing-gear case to a first central portion of the first part in the overall shape of an arch and reacting load in a transverse direction of the engine assembly.