Abstract:
An example active clearance control system for a gas turbine engine includes an actuator, and a case wall portion defining an aperture configured to receive the actuator. The actuator is configured to move an air seal segment, and the actuator is insertable to an installed position within the aperture through a radially outer side of the case wall portion.
Abstract:
The invention relates to an exhaust-gas turbocharger (1) having a regulating flap arrangement (2); and having a pneumatic control capsule (3), having a housing (4), in which housing there is arranged a spring (5) which preloads a diaphragm (6) into a first operating position, and in which housing there is arranged a pressure chamber (7) which is connected via a pressure line (8) to a positive pressure source (9); and having a control rod (10) which is connected at one end (11) to the diaphragm (6) and at the other end (12) to the regulating flap arrangement (2); characterized in that a control valve (15) is arranged in the pressure line (8), which control valve, for an actuation of the regulating flap arrangement (2), operatively connects the pressure chamber (7) to a negative-pressure source (14) which provides negative pressure of greater than 100 mbar, in particular 150 mbar and particularly preferably 200 mbar, and which control valve, for a further actuation of the regulating flap arrangement (2), operatively connects the pressure chamber (7) to the positive pressure source (9).
Abstract:
An active clearance control system for a gas turbine engine includes an annular piston with a multiple of piston lift lugs. A method of active blade tip clearance control for a gas turbine engine includes translating axial movement of an annular piston to radial movement of a multiple of blade outer air seal segments.
Abstract:
An example flow control assembly includes a door that is moved to control flow through a heat exchanger, and a pneumatic device to move the door.
Abstract:
A gas turbine engine includes a nacelle assembly having a core nacelle defined about an engine axis and a fan nacelle assembly mounted at least partially around the core nacelle to define a fan bypass flow path. The fan nacelle assembly includes a fan duct nacelle section and a fan nozzle nacelle section moveable relative to the fan duct nacelle section. A thrust reverser system includes a plurality of pivot doors movable relative to the fan nacelle assembly between stowed and deployed positions. A variable area fan nozzle is in communication with the fan bypass flow path. A first actuator is mounted to the fan duct nacelle section to actuate the pivot door thrust reverser system, and a second actuator is mounted to the fan duct nacelle section to move the fan nozzle nacelle section relative to the fan duct nacelle section to vary a fan nozzle exit area.
Abstract:
Pale (11A) pour une hélice de turbomachine, notamment à soufflante non carénée, comportant sur son bord d'attaque (17) une excroissance (16), caractérisée en ce qu'elle comprend des moyens de réglage de la position de l'excroissance le long de son bord d'attaque.
Abstract:
An example active clearance control system for a gas turbine engine includes an actuator, and a case wall portion defining an aperture configured to receive the actuator. The actuator is configured to move an air seal segment, and the actuator is insertable to an installed position within the aperture through a radially outer side of the case wall portion.
Abstract:
An example flow control assembly includes a door that is moved to control flow through a heat exchanger, and a pneumatic device to move the door.
Abstract:
An active clearance control system for a gas turbine engine includes an annular piston with a multiple of piston lift lugs. A method of active blade tip clearance control for a gas turbine engine includes translating axial movement of an annular piston to radial movement of a multiple of blade outer air seal segments.