Turbofan jet engine with an ancillary-connecting arm, and the ancillary-connecting arm
View Patent ↗A turbofan jet engine includes an external easing, connected by radial arms to an annular internal device, downstream of which is mounted, opposite to the external casing, a shell forming a fairing, ancillaries on the outside of the external casing, and ancillaries on the inside of the shell. The turbofan jet engine further includes at least one monoblock arm for the connection of ancillaries between the outside of the external casing and the inside of the shell, placed parallel to a radial arm.
1. A turbofan jet engine, comprising:
an external casing connected by radial arms to an annular internal device, downstream of which is mounted, opposite to the external casing, a shell forming a fairing,
ancillaries on an outside of the external casing,
ancillaries on an inside of the shell,
a monoblock arm for the connection of ancillaries between the outside of the external casing and the inside of the shell, wherein said monoblock is placed parallel to one of said radial arms, wherein the monoblock arm includes ancillary connections between the external casing and the shell, a block of ancillary-connection passages through the external casing, and a box for distribution of the ancillary connections, and
a gasket support sector to provide continuity on the external casing downstream of the block employed for passage of the connections for ancillaries, an arm cover to cover the ancillary connections downstream of the radial arm, and a fairing support to cover the distribution box for the connection of ancillaries and provide continuity for the shell.
2. A turbofan jet engine according to claim 1 , wherein the box is fire-resistant.
3. A turbofan jet engine according to claim 2 , wherein nipples entering from the box and welded to the latter, are fixed to the ancillary connections.
4. A turbofan jet engine according to claim 3 , wherein each nipple includes a collar, a nut, and a ferrule for connection to an ancillary, the nut being tightened on one side of the box and the collar welded on the other.
5. A turbofan jet engine according to claim 1 , wherein said engine is a double-flow turbofan jet engine, wherein the external casing is the external casing of an intermediate casing, the radial arm is a structural radial arm of the intermediate casing, and the internal annular device is the internal annular device of the intermediate casing.
6. A turbofan jet engine according to claim 1 , further comprising an engine core inside said shell, and wherein said ancillaries on the outside of the external casing are routed into said core through said external casing and through said shell via said monoblock arm.
7. A turbofan jet engine according to claim 6 , wherein said monoblock arm extends radially from said external casing to said shell.
8. A turbofan jet engine according to claim 1 , wherein said monoblock arm is removable as a block between the external casing and the shell.