Nacelle comprising at least one surge trap
View Patent ↗The invention relates to a nacelle for a turbojet engine, comprising a rear section forming an outer structure which defines, together with a concentric inner structure ( 4 ) comprising an inner panel ( 10 ) for surrounding a downstream part of the turbojet engine, an annular flow channel for a so-called secondary flow. The invention is characterized in that the exhaust means ( 11 ) are arranged in the inner panel in such a way that any inopportune surge is exhausted in the annular channel.
1. A nacelle for a jet engine, of the type comprising a rear section forming an outer structure which, together with a concentric inner structure comprising an inner panel intended to surround a downstream portion of the jet engine, defines an annular flow duct for a secondary stream, said nacelle comprising:
exhaust means formed in the inner panel and
at least one excess pressure flap equipped with spacing means for guaranteeing a minimum discharge flow rate to an outside in an event of an untimely excess pressure, said spacing means being produced with the aid of at least one strut equipped with locking means designed to lock said strut in a spacing position in an event of excess pressure requiring opening of the excess pressure flap,
wherein the strut comprises a hollow casing in which a rod can slide, said casing having an end fixed in the excess pressure flap and said rod having an end fixed in the inner panel, wherein the casing has a U-shaped outer shoulder, and the locking means are produced with aid of a U-shaped insert which is slid into the outer shoulder and held in position by at least one retention finger housed in the casing and connecting two free arms of said insert.
2. The nacelle as claimed in claim 1 , wherein elastic return means are provided between the casing and the insert in such a way as to move said insert away from the outer shoulder when the rod has slid in the casing, thereby forcing the retention finger to position itself on a return path of said rod.
3. The nacelle as claimed in claim 1 , wherein the exhaust means are positioned at a front of the inner panel.
4. The nacelle as claimed in claim 1 , further comprising detection means designed so as to make actuation of the exhaust means visible from the outside.
5. The nacelle as claimed in claim 4 , wherein the detection means comprise a control system whose activation is conditioned by activation of the exhaust means.
6. The nacelle as claimed in claim 5 , wherein the control system is connected to at least one external mechanical display member via transmission means.
7. The nacelle as claimed in claim 6 , wherein the control system comprises a pre-stressed trigger connected to the transmission means, the release of which is conditioned by actuation of the exhaust means.
8. An aircraft, comprising at least one nacelle as claimed in claim 1 .