摘要:
A propulsion system and methods are presented. A substantially tubular structure (102) comprises a central axis (104) through a longitudinal geometric center, and a first fan (108) rotates around the central axis, and comprises a first fan hub (110) and first fan blades (112). The fan hub (108) is rotationally coupled to the substantially tubular structure (102), and the first fan blades (112) are coupled to the first fan hub (110) and increase in chord length with increasing distance from the first fan hub (108). A second fan (118) is rotationally coupled to the substantially tubular structure (102) and rotates around the central axis and contra-rotates relative to the first fan (108). Second fan blades (118) are coupled to the second fan hub (120), and a nacelle (124) circumscribing the first fan (108) and the second fan (118) is coupled to and rotates with the first fan (108).
摘要:
A gas turbine engine includes a shaft defining an axis of rotation. An outer rotor directly drives the shaft and includes an outer set of blades. An inner rotor has an inner set of blades interspersed with the outer set of blades. The inner rotor is configured to rotate in an opposite direction about the axis of rotation from the outer rotor. A gear system couples the inner rotor to the shaft and is configured to rotate the inner set of blades at a faster speed than the outer set of blades.
摘要:
A turbine engine assembly (10) is provided. A turbine engine assembly (10) includes a core gas turbine engine (12) includes a high-pressure compressor (18), a combustor (20), and a high-pressure turbine (22). A turbine engine assembly (10) further includes a booster compressor (30) coupled upstream from the core gas turbine engine. A turbine engine assembly (10) further includes an intermediate-pressure turbine (32) coupled to the booster compressor, the intermediate-pressure turbine disposed downstream from the core gas turbine engine. A turbine engine assembly (10) further includes a counter-rotating fan assembly (16) disposed upstream from the booster compressor, the counter-rotating fan assembly includes a first fan assembly (50) configured to rotate in a first direction and a second fan assembly (52) configured to rotate in an opposite second direction. A turbine engine assembly (10) further includes a low-pressure turbine (14) disposed downstream from the intermediate-pressure turbine, the low-pressure turbine configured to drive the counter-rotating fan assembly.
摘要:
The invention relates to a system for balancing a movable turbine part (110) of a turbine or of a compressor. The system comprises a balancing weight element (100) with a first hole (101) and a second hole (102) and a fixing element (201). The first hole (101) and the second hole (102) are formed in such a manner that the fixing element (201) is detachably insertable in either the first hole (101) or the second hole (102). The first hole (101) is formed in such a manner that the inserted fixing element (201) in the first hole (101) detachably couples the balancing weight element (100) to the movable turbine part (110) in a spatially fixed position. The second hole (102) is formed in such a manner that the fixing element (201) is receivable in the second hole (102), when the balancing weight element (100) is non-detachably fixed to the movable turbine part (110) in the spatially fixed position.
摘要:
A method for assembling a gas turbine engine (10) that includes providing a low-pressure turbine inner rotor (42) configured to rotate in a first direction, providing a low-pressure turbine outer rotor (38) configured to rotate in a second direction that is opposite the first rotational direction, and coupling at least one foil bearing (100) to at least one of the inner and outer rotors to facilitate improving clearance control between a first rotating component and at least one of a second rotating component and a non-rotating component.
摘要:
Provided is a motor device capable of suppressing undesired vibrations occurring at the time of starting a motor, by canceling a torque in a motor device system so as to reduce a reaction torque acting on a motor base. The motor device is equipped with a dual axis motor 1 having first and second rotating shafts 10a and 10b projecting at either end, a rotational direction converter 2 having an input shaft 20a to which the torque of the dual axis motor 1 is inputted and an output shaft 20b that outputs the torque by rotating in a direction opposite to that of the input shaft 20a, and a flywheel 3 provided at an end portion of the first rotating shaft 10a, for balancing out the reaction torque acting on the input shaft 20a and the output shaft 20b of the rotational direction converter 2 when the dual axis motor 1 rotates.
摘要:
A counter-rotating open-rotor gas turbine engine includes: a forward un-ducted rotor (15) including a plurality of forward rotor blades and including a forward rotor angle actuator (14) for setting blade pitch angles of the plurality of forward rotor blades; an aft un-ducted rotor (13) including a plurality of aft rotor blades and including an aft rotor angle actuator (12) for setting blade pitch angles of the plurality of aft rotor blades; a gas turbine engine (10) driving forward and aft un-ducted rotors and including a fuel actuator (16) for setting the fuel flow to the gas turbine engine; and an open rotor control system (18/20) including, a forward rotor blade pitch angle command (BetaF) electrically connected to the forward rotor angle actuator, an aft rotor blade pitch angle command (BetaA) electrically connected to the aft rotor angle actuator, a fuel flow command (Wf) electrically connected to the fuel actuator, a forward rotor speed feedback signal (Nf), an aft rotor speed feedback signal (Na), and an engine core speed feedback signal or engine pressure ratio signal (EPR). The open rotor control system may include a multiple-input-multiple output (MIMO) control algorithm including a dynamic inverstion approach for at least the forward rotor blade pitch angle command (BetaF), the aft rotor blade pitch angle command (BetaA), the forward rotor speed feedback signal (Nf) and the aft rotor speed feedback signal (Na).