ENGINE MOUNT SYSTEM FOR IMPROVED PROPELLER WHIRL STABILITY

    公开(公告)号:US20250153854A1

    公开(公告)日:2025-05-15

    申请号:US18441853

    申请日:2024-02-14

    Abstract: Active control apparatus of gas turbine engine mounts are disclosed. An example apparatus for mounting a casing of an unducted gas turbine engine to a pylon, the apparatus includes a mount system; a plurality of sensors to measure at least one parameter indicating propeller whirl stability; and a controller to tune a stiffness of the mount system depending on a function of the at least one parameter measured by the plurality of sensors, the controller to tune the stiffness of the mount system by signaling an actuator, the mount system including: a first linkage; a second linkage; a first pin; a second pin; an interface to engage with the first and second linkages, the interface to at least one of rotate or slide; and the actuator to cause the interface to engage with the first and second linkages based on the signaling from the controller.

    STUD PUSH OUT MOUNT FOR SPINNER
    5.
    发明申请

    公开(公告)号:US20180265181A1

    公开(公告)日:2018-09-20

    申请号:US15458354

    申请日:2017-03-14

    Abstract: An aircraft spinner assembly includes collar stud joints connecting spinner to forward flange connected to fan rotor disk. Collar stud joint is operable to push out spinner when stud is un-torqued. Collar may be attached to stud disposed through spinner bolt hole in spinner and collar disposed in counterbore of spinner bolt hole. An aft stud thread on collar stud may be threaded into aft nut which may be swaged into flange bolt hole in forward flange. A washer may be in counterbore between collar and spinner and made from low friction and/or sacrificial material. A forward radial clearance may surround stud between stud and spinner. A forward nut may be threaded onto forward stud threads on forward end of the collar stud and abut spinner. External aft stud threads may be on collar studs and threaded into internal flange threads within flange bolt holes in forward flange.

    Variable flowpath casings for blade tip clearance control

    公开(公告)号:US12270308B2

    公开(公告)日:2025-04-08

    申请号:US18493508

    申请日:2023-10-24

    Abstract: Disclosed herein are example variable flowpath casings for blade tip clearance control. An example casing for a turbine engine includes an annular substrate extending along an axial direction, the annular substrate including a first surface and a second surface that is radially inward relative to the first surface; an actuator structure coupled to the second surface of the annular substrate; and a smart structure cantilevered from the second surface of the annular substrate, the smart structure including: a support structure, a first region of the support structure coupled to the second surface of the annular substrate, a second region of the support structure coupled to the actuator structure; and a radially inward surface defining a variable surface, the support structure to move the variable surface in a radial direction.

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