Casing structure with connection tabs
View Patent ↗A casing structure interposed between the engine and the nacelle of an aircraft, the casing structure including a shroud surrounding the engine and including a plurality of sectors; at least one radial arm providing the connection to the nacelle; and a plurality of fasteners for securing the plurality of shroud sectors to one another or to the at least one radial arm; the plurality of fasteners including a plurality of connection tabs, each provided with two parallel series of holes for receiving two respective series of headed bolts, a first series passing through a corresponding set of orifices of one shroud sector, and a second series passing through a corresponding set of orifices of an adjacent shroud sector or an adjacent radial arm.
1. A casing structure fitted for providing a mechanical junction between an engine and a nacelle of an aircraft, the casing structure comprising:
a shroud configured to surround the engine and comprising a plurality of shroud sectors;
at least one radial arm arranged around said shroud and configured to provide the connection with the nacelle; and
a plurality of fasteners configured to secure said plurality of shroud sectors to one another or to said at least one radial arm;
said plurality of fasteners comprising a plurality of connection tabs, each provided with two parallel series of holes for receiving two respective series of headed bolts, a first series passing through a corresponding set of orifices of one shroud sector, and a second series passing through a corresponding set of orifices of an adjacent shroud sector or an adjacent radial arm,
wherein each of said connection tabs is in the form of a bridge with a top portion for receiving said two parallel series of holes and extended by two lateral portions, each terminated by a rim that is to form a support for a corresponding lateral portion of said shroud sector or of
said at least one radial arm,
wherein a length of each of said connection tabs corresponds to a width of said shroud, and wherein each of said connection tabs has running along its entire length a central groove for receiving a sealing gasket that, by putting said adjacent shroud sectors or the at least one radial arm adjacent to said shroud sector edge to edge, serves to guarantee aerodynamic airtightness between said shroud sectors or said at least one radial arm.
2. The casing structure according to claim 1 , wherein said orifices of said shroud sectors or said at least one radial arm include chamfers at their inlets in order to fit against the heads of said headed bolts and thus enable them to be mounted flush.
3. An aeroengine including the casing structure according to claim 1 .
4. The casing structure according to claim 1 , wherein the two lateral portions are provided on opposite ends of the top portion.
5. The casing structure according to claim 1 , wherein said two parallel series of holes are absent in said two lateral portions.