Abstract:
A linear actuator for use with a fan with deployable fan blades to deploy the fan blades when in use and stow the fan blades when not in use. The linear actuator utilizes a drive element having a driver that moves linearly along a shaft of the linear actuator. Linear movement of the driver causes radial movement of arms connected to the linear actuator and the fan blades. Radial movement of the arms causes rotational movement of gears attached to the ends of the fan blades to cause the fan blades to rotate into the deployed or stowed configuration.
Abstract:
Le plateau cyclique sur rotor utilise une partie cylindrique du rotor pour se centrer par rapport à l'axe principal de rotation. Plus compact, plus robuste, avec moins de pièces ce dispositif où la rotule-couronne porte au centre un dispositif de rotation représenté ici par un roulement et dont la partie interne porte un plan interne qui est manœuvré en au moins trois points, forme l'ensemble du plateau cyclique (rotule-couronne, roulement, et la partie interne), cette partie qui entraine l'ensemble du plateau cyclique est représenté ici par la couronne triangulaire, elle peut être déplacée dans le sens de l'axe du rotor, et également de telle sorte que son plan soit libre de mouvement angulaire par rapport à cet axe, et rend ainsi possible d'agir cycliquement sur l'angle du pas des pales par des liens entre la rotule couronne et les pieds de pale, toutes les manœuvres des voilures tournantes sont assurées.
Abstract:
A closeout structure for a rotor blade includes a first fluid channel for supplying a first pressure to a first port of a trailing edge (TE) device, a second fluid channel for supplying a second pressure to a second port of the TE de vice, and a trough disposed between the first fluid channel and the second fluid channel. The closeout structure forms a double- W shape.
Abstract:
A connector assembly to connect a swashplate and a rotor shaft or hub is provided. The connector assembly includes a mount configured to fixedly connect to the rotor shaft or hub, a sleeve pivotably attached to the mount, and a translating element translationally retained within the sleeve and configured to engage with the swashplate such that the swashplate and the rotor shaft or hub rotate at the same rotational speed.
Abstract:
The swashplate (2) on a rotor (1) uses a cylindrical part (3) of the rotor to centre itself with respect to the main axis of rotation (8). More compact, more robust and with fewer parts, this device in which the ball joint-ring (4) bears at its centre a rotation device here represented by a rolling bearing (5) and the internal part of which bears an internal plane which is operated at at least three points, forms the swashplate (2) assembly (ball joint-ring, rolling bearing, and the internal part), this part which drives the swashplate assembly is represented here by the triangular ring, it can be moved in the direction of the axis of the rotor, and also in such a way that its plane is free to move angularly relative to this axis and thus allows a cyclic influence on the pitch angle of the blades through connections between the ball joint ring and the blade roots, all rotary wing manoeuvres being provided for.
Abstract:
A helicopter blade position and control mechanism including a hollow rotor shaft (14) for mounting a plurality of rotor blades (22) with provision for pitch adjustment. A control shaft (28) is disposed within the rotor shaft and is rotatable relative thereto and is associated with actuators (20) for the blades such that the pitch of the blades is changed when the control shaft rotates relative to the rotor shaft. A planetary gear assembly (44) interconnects to control shaft and a source of power fixed to the helicopter fuselage (10) and is such that when an input to the planetary gear assembly is quiescent, the control shaft will rotate in the same direction and at the same rate as the rotor shaft to maintain a desired blade pitch. Conversely, when an input is placed on the planetary gear system, relative rotation between the control shaft and the rotor shaft will occur to provide the desired adjustment in blade pitch. The system allows accurate blade position feedback signals to be taken from a feedback device stationarily mounted on the fuselage.
Abstract:
An anti-torque rotor (4) is described for a helicopter (1), comprising: a mast (6) rotatable about a first axis (A); a plurality of blades (8) hinged on the mast (6), extending along respective second axes (B) transversal to said first axis (A) and rotatable about respective said second axes (B) to alter the respective angles of attack; a control element (16) sliding and rotating with respect to the mast (6), and operatively connected to said blades (8) to cause the rotation of said blades (8) about respective second axes (B) following a translation of said element (16) along the first axis (A); a control rod (10) sliding axially along first axis (A) with respect to the mast (6) and angularly fixed with respect to the first axis (A); and a connection element (17) interposed between the control rod (10) and the control element (16), sliding along the first axis (A) with respect to the mast (6) and integrally with the control rod (10); the anti-torque rotor (4) further comprises an interface (18, 93) made of an antifriction material interposed between said control rod (10) and said connection element (17).
Abstract:
A magnetorheological fluid clutch apparatus comprises a stator having at least an annular wall; a first rotor rotatably mounted to the stator, the first rotor having at least one first shear surface; a second rotor rotatably mounted to the stator for rotating about a common axis with the first rotor, the second rotor having at least one second shear surface opposite the at least one first shear surface, the shear surfaces separated by at least one annular space. A magnetorheological (MR) fluid is in an MR fluid chamber including the at least one annular space, the MR fluid configured to generate a variable amount of torque transmission between the rotors when subjected to a magnetic field. An inner magnetic core and an outer magnetic core with an annular cavity therebetween receive the annular wall of the stator, the inner magnetic core and the outer magnetic core connected to at least one of the rotors to rotate therewith so as to be rotatably mounted to the stator. Outer and inner fluid gaps are between the inner magnetic core and the annular wall, and between the outer magnetic core and the annular wall, the outer and inner fluid gaps filled with at least one fluid. At least one coil is supported by the annular wall and actuatable to deliver a magnetic field through the MR fluid, the magnetic field following a path comprising the annular wall, the outer fluid gap, the outer magnetic core, the at least one first shear surface and the at least one second shear surface, the inner magnetic core and the inner fluid gap, wherein one of the rotors is adapted to be coupled to a power input and the other of the rotors is adapted to be connected to an output whereby actuation of the at least one coil results in a variation of torque transmission between the rotors.
Abstract:
The swashplate (2) on a rotor (1) uses a cylindrical part (3) of the rotor to centre itself with respect to the main axis of rotation (8). More compact, more robust and with fewer parts, this device in which the ball joint-ring (4) bears at its centre a rotation device here represented by a rolling bearing (5) and the internal part of which bears an internal plane which is operated at at least three points, forms the swashplate (2) assembly (ball joint-ring, rolling bearing, and the internal part), this part which drives the swashplate assembly is represented here by the triangular ring, it can be moved in the direction of the axis of the rotor, and also in such a way that its plane is free to move angularly relative to this axis and thus allows a cyclic influence on the pitch angle of the blades through connections between the ball joint ring and the blade roots, all rotary wing manoeuvres being provided for.