323 results about "Thrust reversal" patented technology

A translating cowl composed of two sub-structures forms the thrust reverser for a turbofan engine. The two sub-structures form the rear part of a nacelle, are translatable, and have operative and inoperative modes of operation. The operative mode is used for direct or reverse thrust operation of the engine and the inoperative mode is used for access to the engine.

A gas turbine engine system includes a fan (14), a housing (28) arranged about the fan, a gas turbine engine core having a compressor (16) at least partially within the housing, and a fan bypass passage (30) downstream of the fan for conveying a bypass airflow (D) between the housing and the gas turbine engine core. A nozzle (40) associated with the fan bypass passage includes a first nozzle section (54a) that is operative to move in a generally axial direction to influence the bypass airflow, and a second nozzle section that is operative to also move in a generally axial direction between a stowed position and a thrust reverse position that diverts the bypass airflow in a thrust reversing direction. An actuator (42) selectively moves the first nozzle section and the second nozzle section to influence the bypass airflow and provide thrust reversal.

A nacelle (55) for a gas turbine engine (10), the engine (10) comprising accessories (34) mounted to a fan casing (28) and a core engine (9), the nacelle (55) substantially surrounds the engine (10) and comprises an intake (12) and a thrust reverser unit (31). The thrust reverser unit (31) is formed by two generally C-shaped portions (31a, 31b). The thrust reverser unit (31) is openable to provide access to the accessories (34) and the core engine (9). The nacelle (55) further comprises a fan containment casing (33) that is integral with the intake (12).

A thrust reverser includes reverser doors circumferentially spaced around a nacelle. An arcuate yoke is disposed coaxially around the nacelle. An actuator is mounted tangentially to the yoke for rotary movement thereof. Actuator rods join the doors to the yoke for simultaneous deployment of the doors as the yoke is rotated.

A thrust reverser for a jet engine comprises a translating wall section moveable between a stowed position and a deployed position. The translating wall section is adjacent an annular fan duct wall or other fixed portion of the jet engine when in the stowed position and is separated from the annular fan duct wall when in the deployed position, thereby creating an aperture through which a fluid stream passes. A fluid flow reverser element directs the fluid stream in a direction generally forward relative to the jet engine when the translating wall section is in the deployed position. The fluid flow reverser element extends only partially into the fluid stream such that only a first portion of fluid of the fluid stream engages the fluid flow reverser element. A second portion of the fluid stream is entrained in the first portion and is thereby directed forward relative to the jet engine.

A fan thrust reverser includes an outer louver door joined to an inner blocker door by a drive link in a bifold configuration. The louver door is stowed closed in the outer skin of a fan nacelle outside the blocker door stowed closed in the inner skin of the nacelle. An actuator deploys open the louver and blocker doors, with the louver door extending radially outwardly and the blocker door extending radially inwardly for reversing fan exhaust flow during thrust reverse operation.

The invention relates to a thrust reverser (9) for an aircraft nacelle (1), including: a front frame (11), a cowl (21) which can move between an operating position and an intermediate maintenance position downstream of the front frame (11), means (26) for moving the cowl (21) between closed and open positions, and an inner structure (23) which can move between an operating position and an intermediate maintenance position downstream of the front frame (11). In addition, the cowl (21) comprises two half-cowls (21a, 21b) and the inner structure (23) comprises two structure halves (23a, 23b), whereby said half-cowls (21a, 21b) and said inner structure halves (23a, 23b) can open outward when the cowl (21) and the inner structure (23) are in the intermediate maintenance position.

A thrust reverser for a turbofan engine having an air duct defined radially inwardly by a wall around the turbofan engine and radially outwardly in part by a fan cowl of the engine. A bulkhead is adapted to be mounted on the fan cowl having a shaped surface defining an upstream wall. A translating cowl is supported for movement axially between a closed position substantially adjacent the bulkhead and an open position spaced axially apart from the bulkhead so as to form an outlet for discharge of air from the air duct. The translating cowl has a first wall and a kicker plate defining a shaped surface. The kicker plate and / or the bulkhead may have a dimension which varies at different radial locations about a circumference of the translating cowl to selectively control the forward component of velocity of the air discharged from the air duct. A plume control device may extend longitudinally across the outlet to divide the air discharged from the air duct into a plurality of plumes. A vane spaced axially aft from the bulkhead has an airfoil section to guide air to the outlet in order to control turning and area match when the translating cowl is in the deployed position.

A turbofan nacelle includes forward and aft cowls adjoining at a joint, and including an exhaust duct having a main outlet for discharging exhaust. A variable nozzle surrounds the exhaust duct and includes a secondary outlet around the main outlet. A thrust reverser bridges the forward and aft cowls upstream from the variable nozzle. The variable nozzle is inductively powered and controlled across the closed joint, and is uncoupled inductively from the forward cowl when the joint is open.

The invention relates to a thrust reverser (1) comprising an opening with fixed grids (4) that is closed by a sliding lid (2) in case of direct thrust, and opened by the downstream longitudinal translation displacement of the lid (2) in case of thrust reversal. A flap (20) is pivotally mounted at one upstream end on the lid (2) and can move between a retracted position and an expanded position in which, in case of thrust reversal, it blocks an annular channel (10) in order to redirect a gas flow towards the grid opening (4). A slider (24) for driving the flap (20) is mounted so as to be capable of displacement in at least one translation guiding rail (33) provided in the structure of the lid (2), and is connected to a downstream end of the flap (20) through a driving connecting rod (30) so that a translation movement of the slider (24) in the guiding rail (33) results in a pivoting of the connecting rod (30) and of the flap (20). Actuation means (22) are provided for driving the slider (24) in a translation movement in the guiding rail (33) when the lid (2) is in a downstream translation phase.

A thrust reverser comprises a translating sleeve, a torque beam, a plurality of cascades, a plurality of blocker doors, and a plurality of actuators. The translating sleeve is positioned at the rear of an aircraft nacelle and is translated rearward during thrust reverser deployment. The torque beam is positioned within the nacelle and configured to prevent airflow into the nacelle during thrust reverser deployment. The plurality of cascades are positioned around the circumference of the torque beam during thrust reverser stowage and are translated rearward during thrust reverser deployment. The plurality of blocker doors are positioned in alignment with the plurality of cascades and direct airflow through the plurality of cascades during thrust reverser deployment. The plurality of actuators are coupled to the forward edge of the sleeve and configured to translate the sleeve rearward during thrust reverser deployment.

A latch for a thrust reverser duct on an aircraft engine. The latch accomplishes work during both the closing stroke and the handle folding stroke. An outer handle 100 release trigger 112 can lock an outer handle 100 to an inner handle 60 to fix the relative position of the outer handle 100, the inner handle 60, an idler link 80, a rocker link 78 and a secondary link 75. While they are in fixed position, the parts act as a closing handle unit 125 during the closing stroke. Once the closing stroke is completed, the inner handle 60 is locked into a fixed position with hook arm 40 and a primary link 70. The outer handler release trigger 112 can then be disengaged and the secondary link 75, the rocker link 78 and the idler link 80 work to provide mechanical advantage during the folding of the outer handle 100.

Methods are provided for manufacturing a thrust reverser cascade. One of these methods includes providing a first cascade segment and providing a second cascade segment. The first cascade segment includes a first frame rail, a second frame rail and an array of first vane segments laterally between the first and the second frame rails. The second cascade segment includes an array of second vane segments. The second cascade segment is bonded laterally to and between the first and the second frame rails and transversely to the array of first vane segments. In another method, first and second cascade segments are discretely molded. Each of the cascade segments includes an array of vane segments and comprises fiber reinforcement in a polymer matrix. The second cascade segment is bonded to the first cascade segment and is nested into the first cascade segment.

A fan thrust reverser includes a nacelle having radially outer and inner skins. An outer door is disposed in the outer skin, and mounted to the nacelle at a hinge joint. A toggle link is pivotally joined between the outer door and the nacelle for latching stowed the outer door in the nacelle. An actuator is provided for rotating the outer door about the hinge joint for deploying the door outwardly from the nacelle and toggling off the toggle link, and stowing inwardly the outer door upon reverse rotation thereof and toggling on the toggle link to latch the door stowed in the nacelle.

A thrust reverser for a turbofan jet engine having a stationary structure defining an upstream part of a fan cowling and an axially displaceable, annular structure located downstream of the stationary structure, wherein the inner surface of the fan cowling is spaced from an outer surface of an engine cowling to form an annular duct. A plurality of flaps form a portion of the inner surface of the fan cowling during a forward thrust position, and in a reverse thrust position, the flaps pivotably rotate about a stationary pivot so that their first edges are adjacent with the outer surface of the engine cowling to block the annular duct. A plurality of thrust reverser baffle portions are covered by the flaps during the forward thrust position, and during the reverse thrust position, the thrust reverser baffle portions cover a passageway in the fan cowling between the stationary structure and the displaceable structure. The plurality of thrust reverser baffle portions are radially offset and substantially parallel, and comprise a stationary baffle portion and at least one movable baffle portion. In a reverse thrust position, the movable baffle portions are displaced so that the plurality of thrust reverser baffles are longitudinally juxtaposed, redirecting the deflected gas flow.

A ducted fan gas turbine assembly has a propulsive fan driven by a core engine. The turbine assembly has an annular bypass duct which receives an airflow from the fan and is bounded on the radially inward side by the core engine and on the radially outward side by an engine nacelle. The turbine assembly has a thrust reverser assembly having a vane arrangement including a first set of turning vanes for channelling airflow from the duct in a rearward direction, a second set of turning vanes for channelling airflow from the bypass duct in a forward direction. The thrust reverser assembly includes a plurality of blocker doors which are deployable to block the bypass duct. The nacelle has stationary and movable cowl portions that cooperate with the thrust reverser assembly to provide several operational configurations.

A gas turbine engine system includes a nozzle having a plurality of positions for altering a discharge flow received through the nozzle from a gas turbine engine fan bypass passage. The nozzle is integrated with a thrust reverser having a stowed position and a deployed position to divert the discharge flow and generate a reverse thrust force. At least one actuator is coupled with the nozzle and the thrust reverser to selectively move the nozzle between the plurality of positions and to move the thrust reverser between the stowed position and the deployed position.

A gas turbine engine system includes a nozzle having a plurality of positions for altering a discharge flow received through the nozzle from a gas turbine engine fan bypass passage. The nozzle is integrated with a thrust reverser having a stowed position and a deployed position to divert the discharge flow and generate a reverse thrust force. At least one actuator is coupled with the nozzle and the thrust reverser to selectively move the nozzle between the plurality of positions and to move the thrust reverser between the stowed position and the deployed position.

A thrust reverser includes reverser doors circumferentially spaced around a nacelle. An arcuate yoke is disposed coaxially around the nacelle. An actuator is mounted tangentially to the yoke for rotary movement thereof. Actuator rods join the doors to the yoke for simultaneous deployment of the doors as the yoke is rotated.

A target type thrust reverser is provided for reversing the thrust of jet engines, particularly on aircraft. The thrust reverser preferably has a plurality of doors that occupy a stowed position about the nozzle of the jet engine until deployed. In the stowed position, the doors are out of the exhaust stream of the jet engine. The doors are mounted to pivot joints on the rear portions of the doors. To deploy the thrust reverser, actuators connected to the pivot joints cause the pivot joints to translate linearly aft, and link rods attached to the forward portions of the doors cause the doors to pivot about the sliding pivot joints. In this manner, the distance between the doors and the engine exhaust nozzle is minimized during deployment, which enables significant weight savings due to reduced loads and fewer parts. A novel lock is also provided for simultaneously locking the thrust reverser doors and the actuators.

A thrust reverser system actuator assembly is provided that includes a torque limiter to limit the number of torque that may be applied to the actuator assembly. The actuator assembly includes an actuator and a torque limiter assembly. The actuator is adapted to receive a drive force and is configured, in response to receipt of the drive force, to move between a stowed position and a deployed position. The torque limiter assembly is coupled to an end of the actuator and is configured to limit torque applied to the actuator assembly upon a torque magnitude being reached in at least the actuator.

A gas turbine engine system includes a fan (14), a housing (28) arranged about the fan, a gas turbine engine core having a compressor (16) at least partially within the housing, and a fan bypass passage (30) downstream of the fan for conveying a bypass airflow (D) between the housing and the gas turbine engine core. A nozzle (40) associated with the fan bypass passage includes a first nozzle section (54a) that is operative to move in a generally axial direction to influence the bypass airflow, and a second nozzle section that is operative to also move in a generally axial direction between a stowed position and a thrust reverse position that diverts the bypass airflow in a thrust reversing direction. An actuator (42) selectively moves the first nozzle section and the second nozzle section to influence the bypass airflow and provide thrust reversal.

The present invention relates to a thrust reverser for the nacelle of a turbojet engine comprising, on the one hand, means (11) for deflecting at least some of an air flow of the turbojet engine and, on the other hand, at least one hood (10) able to move translationally in a direction substantially parallel to a longitudinal axis of the nacelle and able to switch alternately from a closed position in which it ensures the aerodynamic continuity of the nacelle and covers the deflection means, and an open position in which it opens a passage in the nacelle and uncovers the deflection means, characterized in that the moving hood comprises at least one outer part (10a) having a downstream extension forming a nozzle and at least one internal part (10b) each of which parts is mounted such that it is translationally mobile and is connected to at least one actuating means able to allow it to be moved, each independently of the other, or together, in a substantially longitudinal direction of the nacelle. The present invention also relates to a turbojet engine nacelle comprising such a thrust reverser.

A thrust reverser includes forward and aft louvers pivotally mounted in a compartment defining a flow tunnel through the outer and inner skins of a fan nacelle. An aft flap is integrally joined to the aft louver for rotation therewith. A unison link joins together the forward and aft louvers. And, an actuator is joined to the louvers for rotation thereof between a stowed position in which the louvers and flap are closed in the nacelle skins and a deployed position in which the louvers and flap are pivoted open from the skins.

A turbojet thrust reverser includes two doors each displaceable between an open position and a closed position of the reverser by at least one respective control actuator. Two electric motors drive the control actuators for the doors; each motor being controlled by an electronic control unit connected to a full authority digital engine control. Two servo-control devices control the displacement of the doors as a function of determined position references. The servo-control devices enable the doors to be displaced synchronously as a function of any variation in the forces exerted on the reverser and as a function of any force difference between the two doors.

A power unit for providing propulsive thrust includes an efflux duct defining a first fluid flow path along which gaseous fluid travels for discharge from a first fluid exit opening to provide propulsive thrust. The power unit also has a thrust reversing structure which, when in a deployed position, redirects the flow of gaseous fluid along a second fluid flow path to discharge from a second fluid exit opening to provide reverse thrust. The thrust reversing structure includes longitudinally translating cowl portions, which are moveable from a stowed position to the deployed position where the translating cowl portions block a major portion of the first fluid exit opening to cause gaseous fluid to efflux from the second fluid exit opening. The translating cowl portions move in a generally longitudinal direction towards the deployed position along a path which is inclined to the power unit axis.

A lock assembly for a thrust reverser system that prevents thrust reverser deployment when the thrust reversers are in the stowed position, but does not prevent thrust reverser movement, in either the deploy or stow directions, when the thrust reversers are out of the stowed position and the lock assembly is in the locked position.

The invention relates to a system and a method for operating a thrust reverser for a turbofan propulsion system. A thrust reverser assembly for use in a turbofan engine assembly is provided. The engine assembly includes a core gas turbine engine and a core cowl which circumscribes the core gas turbine engine. A nacelle is positioned radially outward from the core cowl to define a fan nozzle duct between the core cowl and a portion of the nacelle. The nacelle includes a stationary cowl. The thrust reverser assembly includes a first translating cowl that is slidably coupled to the nacelle. The first translating cowl is positionable with respect to the stationary cowl. A second translating cowl is slidably coupled to the nacelle such that the first translating cowl is positioned between the stationary cowl and the second translating cowl. The second translating cowl is positionable with respect to the first translating cowl. A positioning assembly is coupled to the first translating cowl. An actuator assembly is operatively coupled to the second translating cowl for selectively moving the second translating cowl. The actuator assembly is configured to engage the positioning assembly to selectively move the first translating cowl.

Aircraft nacelle comprising a cowling and an engine, the cowling comprising a fixed portion and a mobile portion able to slide in order to define a radial opening with the mobile portion, a thrust reverser system comprising a plurality of flaps intended to be deployed in order to seal at least partially an annular channel surrounding the engine, the mobile portion of the cowling comprising an annular housing extending longitudinally in order to receive the flaps in rest position. Each flap is linked to the fixed portion by a pivot joint and is linked to the mobile portion by a sliding-pivot joint, in such a way that a sliding of the mobile portion in separating from the fixed portion provokes a rotation of each flap around the axis of rotation of the joint with the fixed portion.