AIRCRAFT PROPULSION SYSTEM HAVING A LINEAR ELECTRIC MOTOR

    公开(公告)号:US20220355942A1

    公开(公告)日:2022-11-10

    申请号:US17734212

    申请日:2022-05-02

    Abstract: A propulsion system for an aircraft, which has a chassis, a propeller able to move in rotation about an axis of rotation, a main gear as one with the propeller, an electric generator, at least one linear electric motor having a fixed element and a slider able to move in translation, for each linear electric motor, a secondary gear meshing with the main gear and mounted to be able to move in rotation about an axis of rotation perpendicular to the axis of rotation, and a rod of which one end is articulated on the corresponding slider and of which the other end is articulated on the corresponding secondary gear at an articulation that is offset with respect to the axis of rotation of the secondary gear.

    BYPASS TURBOFAN INCLUDING A SYSTEM FOR BLOCKING THE SECONDARY FLOW INCLUDING VEILS

    公开(公告)号:US20240110536A1

    公开(公告)日:2024-04-04

    申请号:US18475570

    申请日:2023-09-27

    CPC classification number: F02K3/04 B64D29/02 B64D29/06 F05D2220/36

    Abstract: A bypass turbofan with a nacelle delimiting a stream and including a cowl mobile in translation between an advanced position in which a window is open between the stream and the exterior, transmission systems, each of which includes at least one arm mobile in rotation between retracted and deployed positions across the stream, in which each transmission system is mobile in translation between advanced and retracted positions, for each arm, a flexible veil fastened to the arm and alternately occupying a folded or unfolded position, and, for each transmission system, an actuator configured to move the mobile cowl, the transmission system and each arm.

    TURBOFAN ENGINE COMPRISING A SYSTEM FOR BLOCKING THE FLOW PATH OF THE BYPASS STREAM COMPRISING VEILS

    公开(公告)号:US20220228541A1

    公开(公告)日:2022-07-21

    申请号:US17580110

    申请日:2022-01-20

    Abstract: A turbofan engine with a nacelle and a flow path, in which the nacelle comprises a movable cowl that makes it possible to define a window between the flow path and the outside, veils with a first edge fixed to the movable cowl and alternately assuming a folded position or a deployed position across the flow path, and a pneumatic system displacing a second edge of the veils from the folded position to the deployed position and vice versa. The pneumatic system comprises a rigid main roll, for each veil, at least one extendable secondary roll fixed to a second edge of the veil, and a pressurization and depressurization system which, alternately, generates a pressure or a depression in each secondary roll. Replacing the reverse doors and their driving mechanisms with flexible veils and a pneumatic system allows for a weight reduction.

    DUCTED FAN TURBINE ENGINE COMPRISING A SYSTEM INVOLVING SCREENS FOR BLOCKING OFF THE DUCT FOR THE SECONDARY FLOW

    公开(公告)号:US20220025832A1

    公开(公告)日:2022-01-27

    申请号:US17379746

    申请日:2021-07-19

    Abstract: A ducted fan turbine engine with a nacelle and a duct for a secondary flow. The nacelle comprises a fixed structure. A mobile cowl is able to move between a forward position and a backward position to define an opening between the duct and the outside. A plurality of rollers are mounted to freely rotate on the mobile cowl. For each roller there is a flexible screen with a first edge fixed to the roller and a second edge, in which the screen is able to adopt a furled position, wound around the roller, or a deployed position deployed across the duct. A deployment mechanism is arranged to move each second edge to move the screen from the furled position to the deployed position. A furling mechanism is arranged to drive each roller in rotation to move the associated screen from the deployed position to the furled position.

    TURBOFAN COMPRISING A SYSTEM COMPRISING SCREENS FOR CLOSING OFF THE BYPASS DUCT

    公开(公告)号:US20210207557A1

    公开(公告)日:2021-07-08

    申请号:US17140717

    申请日:2021-01-04

    Abstract: A turbofan having a nacelle delimiting a duct for a bypass flow and including a fixed structure including a guide vane support with guide vanes, a mobile cowl movable in translation between an advanced position and a retracted position, arms, each one being mobile in rotation on the guide vane support between a stowed position and a deployed position and comprising a distal end and a proximal end, for each pair of adjacent arms, a flexible screen extending angularly between the two arms, and of which an exterior edge is attached to the guide vane support, and wherein the distal end of each arm is fixed along the interior edge, a link rod mounted articulated between the distal ends, actuators to cause the mobile cowl to move, and an operating system which moves each arm. Such an arrangement allows a reduction in weight.

    TURBOFAN COMPRISING A SYSTEM COMPRISING A SCREEN FOR CLOSING OFF THE BYPASS DUCT

    公开(公告)号:US20210207556A1

    公开(公告)日:2021-07-08

    申请号:US17140707

    申请日:2021-01-04

    Abstract: A turbofan has a nacelle delimiting a duct for a bypass flow and comprises a fixed structure comprising a guide vane support with guide vanes, a mobile cowl able to move in translation between an advanced position and a retracted position, arms, each one being mobile in rotation between a stowed position and a deployed position and comprising a distal end and a proximal end, a flexible screen, of which an exterior edge is attached to the guide vane support rearward of the guide vanes, and wherein the distal end of each arm is fixed along the interior edge, actuators to cause the mobile cowl to move, and an operating system which moves each arm. Replacing the reversal doors and their drive mechanisms with the flexible screen and the set of rotationally-mobile arms allows a reduction in weight.

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