摘要:
A thrust reverser is disclosed for a turbojet engine having a cowling forming an outer boundary of a gas flow duct through which gases flow from a front to a rear, the cowling having at least one reverse thrust opening communicating with the gas flow duct and a thrust reverser door pivotally connected to the cowling so as to move between a forward thrust position wherein the thrust reverser door covers the reverse thrust opening, and a reverse thrust position wherein the reverse thrust opening is uncovered and the thrust reverser door directs at least a portion of the gases flowing through the duct through the reverse thrust opening. The thrust reverser also includes at least one panel having an inner surface, a first lateral side pivotally connected to the cowling so as to pivot about a panel pivot axis extending generally parallel to the gas flow direction through the duct and an actuating mechanism connected to a second lateral side of the panel so as to move the panel about the panel pivot axis between a first position in which the inner surface forms a portion of the outer boundary of the gas flow duct and a second position wherein the second lateral side is disposed within the gas flow duct. The actuating mechanism may include a mechanical linkage interconnecting the second lateral side of the panel to the thrust reverser door such that movement of the thrust reverser door between the forward and reverse thrust positions causes movement of the panel between the first and second positions.
摘要:
A thrust reverser is disclosed for a turbofan type turbojet engine assembly with a cowling having an inner cowling surface forming an outer boundary of a gas flow duct, and an outer cowling surface spaced from the inner cowling surface, the inner and outer cowling surfaces joining at a rearmost edge of the cowling, the thrust reverser having a thrust reverser baffle with an outer baffle surface and an inner baffle surface, a forward linkrod pivotally connected to a forward portion of a thrust reverser baffle and to the cowling, and a rear linkrod pivotally connected to the thrust reverser baffle and to the cowling. The thrust reverser baffle is movable between a forward thrust position wherein the outer baffle surface is substantially flush with the outer cowling surface, a forward portion of the thrust reverser baffle covering an inner rear cowling portion having the inner cowling surface, and a reverse thrust position in which the reverse thrust baffle is disposed rearwardly of the rearmost cowling edge so as to redirect gases flowing through the gas flow duct. When in the forward thrust position, the forward and rear linkrods are totally enclosed between the spaced apart inner and outer cowling surfaces.
摘要:
A pivot system is disclosed for pivotally connecting a movable component to a fixed component, the pivot system having a swivel device mounted on one of the movable and fixed components, a headed shaft passing through a portion of the other of the movable and fixed components and engaging the swivel device, the headed shaft having a longitudinal axis forming the pivot axis between the components, an anti-rotation device engaging the shaft so as to prevent relative rotation between the shaft and the component to which it is mounted, and an anti-axial movement device engaging the shaft as to prevent relative movement between the shaft and the component to which it is mounted along the longitudinal axis of the shaft. This structure enables the shaft to be installed having access to only one end of the pivot shaft, improving over the known systems in which it is necessary to have access to both ends of the pivot shaft.
摘要:
A thrust reverser is disclosed for a turbojet engine having an outer cowling and an inner cowling forming a generally annular gas flow duct therebetween, the thrust reverser having at least one thrust reverser door pivotally attached to the outer cowling so as to pivot about a first stationary axis to move between a forward thrust position and a reverse thrust position, a thrust reverser panel pivotally attached to the inner cowling so as to pivot about a second stationary axis to move between a forward thrust position and a reverse thrust position, and a connector connecting the thrust reverser door and the thrust reverser panel such that when the thrust reverser door is in the reverse thrust position, the thrust reverser panel is in the reverse thrust position and when the thrust reverser door is in the forward thrust position, the thrust reverser panel is also in the forward thrust position.
摘要:
The reverser includes a partition (28) exhibiting openings (19) and separating the cavity (16) which exists, when the doors (2) are in the closed position, between the front part (7) of the internal panel (11) of the door and the stream of gaseous flow (15) flowing in direct jet mode through the jet pipe CA, thus overcoming the aerodynamic losses which result from the presence of this cavity.
摘要:
The invention relates to thrust reversers with doors for a jet engine. The upstream edge of the reverser doors is equipped with a deflecting structure consisting of a rigid frame (10, 12, 13) fixed to the door and delimiting a space (14) capped by a stiffener (15). In the space (14) are housed vanes (16) with aerodynamic profile in the form of a wing which is inclined by an angle a with respect to the plane of the frame (10, 12, 13) in order to orient laterally the flow of the gases which is diverted by the reverser. This arrangement makes it possible to reduce, or even to prevent, re-ingestion by the engine of the diverted gases, or interference of the latter with the wing structure of the aircraft.
摘要:
An improvement made to jet-engine thrust reversers and, more particularly, to reversers called tilting-door reversers. The doors are equipped, on their upstream portion, with a flow-deflecting overlay 90 which, in the open-door position, is in a position close to a line PM parallel to the axis of the engine 1, the overlay making with the inner door skin an angle B greater than 90.degree., preferably between 105.degree. and 110.degree.. The invention is more particularly applicable to dual-flow engines.
摘要:
A thrust reverser system for fan jet type aircraft gas turbine engines using a "sliding hinge" arrangement for moving blocker doors between the stowed and deployed positions. Blocker doors fill a plurality of radially arranged openings in an engine nacelle near the aft end of the nacelle. In the stowed position, each blocker door forms and inner and outer streamlined surface corresponding to the nacelle walls, with no actuator mechanisms extending into the air flow stream within the nacelle. Each blocker door is moved to the deployed position by an extensible rod, such as a hydraulic piston rod, extending between the nacelle near the forward edge of the opening and the approximate centerline of the door. As the door begins to move rearwardly, slider pins on the door edges slide along tracks on the adjacent nacelle islands between adjacent openings. Meanwhile, a hinged bar secured at its aft end to the adjacent nacelle island and at its forward end to the door edge rotates, pivoting the aft end of the door inwardly into contact with the engine core while the door forward end pivots outwardly of the opening. The doors substantially block airflow through the duct between nacelle and core and direct it in an outward, reverse or forward, direction.
摘要:
An apparatus for influencing a flow of air through a passageway defined between an inner wall and a double outer wall that includes first and second walls each formed with an opening, comprises a first door, a second door, vortex generation means positioned between the first and second walls and adjacent the upstream end of the opening in the first wall, and an actuator pivotally attached to the first and second doors. The actuator has a first condition wherein the first and second doors close the openings in the first and second walls respectively and has a second condition wherein the first door is at the downstream end of the opening in the first wall and extends across the passageway and directs the flow of air through the opening in the first wall, and the second door is at the down-stream end of the opening in the second wall and deflects the flow of air through that opening.
摘要:
The present invention relates to a thrust reverser system for a turbofan-type turbojet engine having thrust reverser doors with movable deflectors. The deflectors are movably attached to an upstream edge of the thrust reversing doors and are movable between retracted and extended positions. When the thrust reversing door is closed and the turbojet engine operates in its normal thrust mode, the deflectors are retracted thereby enabling the difference between the inner surface of the thrust reversing door and the theoretical aerodynamic flow line to be reduced or eliminated. When the thrust reversing door is in the thrust reversing position, the deflector is extended so as to protrude beyond the inner surface of the door so as to direct the air flow in a more forward direction to increase the thrust reversing capabilities of the system. The deflectors are mounted on the thrust reversing door such that they are automatically extended when the thrust reversing door moves to the thrust reversing position.