Abstract: A variable-pitch vane including a plurality of propeller blades (2). Each blade has a variable pitch according to a blade rotational axis (A1) and a root (201). A plurality of rotor connecting shafts (6), each shaft having a foot (602) and a head (601). The root (201) of each blade is mounted on the head (601) of a rotor connecting shaft via a pivot (8) in such a way as to allow each blade (2) to rotate according to the blade rotational axis (A1), in which each blade (2) has a blade pitch, such that the blade rotational axis (A1) is inclined relative to a radial axis (A2) passing through the foot (602) of the corresponding shaft.

Abstract: A part includes a structure and at least one shape memory alloy element that is prestressed and embedded at least in part within said structure. The shape memory alloy is suitable for dissipating the mechanical energy of said structure when it vibrates in a given frequency band.

Abstract: The invention relates to a device (1) for controlling the setting of the blades (2) of a rotor (3) of a propeller, including a radial shaft (6), the rotation of which modifies the setting of the blade (2), a main spring (13), a first end (14) of which is connected to the rotor (3) and a second end (15) of which is connected to a part (8, 10) having an axial movement which drives the rotation of the radial shaft, and has a movement, the travel of which is offset relative to the first end in a direction (7) that is orthogonal to the axial direction (5), the main spring exerting a resilient force which aims to move the parts toward a position in which the cord of the profile of the blade is orthogonal to the plane of rotation of the propeller, in the absence of part control by means of a jack.

Abstract: A control system includes a power actuator coaxial with the axis of rotation of the propeller, and a transmission device connecting the power actuator to pivots, of the blades to be controlled, arranged substantially radially with respect to the axis of rotation. The actuator is a rotary jack whose mobile part rotates about the axis of rotation and is connected to the transmission device by a mobile mechanical connection which transforms the rotation imparted by the mobile part of the jack about the axis of rotation into a rotation of the blades about the axes of the pivots which are perpendicular to the axis of rotation.

Abstract: The invention concerns a device (1) for controlling the pitch of the blades of a fan (4) rotor (3), comprising a radial shaft (6) linked to the blade, a connection rod (8) of which the axial movement controls the rotation of the radial shaft (6), characterized in that it comprises:—a first part (10) that is mobile in rotation with the rotor (3) about the axis (11) of the fan (4), and on which one end of each connection rod (8) is secured,—a second part (12) linked to the first part (10), and—at least three cylinders (14) capable of moving said second part (12) in axial translation, and of varying the tilt of said second part, the translation and tilt of the second part (12) driving a corresponding translation and tilt of the first part (10), such that, when the first part (10) rotates, each connection rod (8) is subject to axial displacement of which the amplitude is variable and is a function of the tilt of the first part (10), making it possible to vary the pitch of the blade during the rotation of same.

Abstract: A variable-pitch vane comprising: a plurality of propeller blades (2), each being of variable pitch according to a blade rotational axis (A1) and each having a root (201), a plurality of rotor connecting shafts (6), each shaft having a foot (602) and a head (601). the root (201) of each blade being mounted on the head (601) of a rotor connecting shaft via a pivot (8) in such a way as to allow each blade (2) to rotate according to the blade rotational axis (A1), in which each blade (2) has a blade pitch, such that the blade rotational axis (A-i) of same is inclined relative to a radial axis (A2) passing through the foot (602) of the corresponding shaft.

Abstract: The invention concerns a device (1) for controlling the pitch of the blades of a fan (4) rotor (3), comprising a radial shaft (6) linked to the blade, a connection rod (8) of which the axial movement controls the rotation of the radial shaft (6), characterised in that it comprises:—a first part (10) that is mobile in rotation with the rotor (3) about the axis (11) of the fan (4), and on which one end of each connection rod (8) is secured,—a second part (12) linked to the first part (10), and—at least three cylinders (14) capable of moving said second part (12) in axial translation, and of varying the tilt of said second part, the translation and tilt of the second part (12) driving a corresponding translation and tilt of the first part (10), such that, when the first part (10) rotates, each connection rod (8) is subject to axial displacement of which the amplitude is variable and is a function of the tilt of the first part (10), making it possible to vary the pitch of the blade during the rotation of same.

Abstract: The invention relates to a device (1) for controlling the setting of the blades (2) of a rotor (3) of a propeller, including a radial shaft (6), the rotation of which modifies the setting of the blade (2), a main spring (13), a first end (14) of which is connected to the rotor (3) and a second end (15) of which is connected to a part (8, 10) having an axial movement which drives the rotation of the radial shaft, and has a movement, the travel of which is offset relative to the first end in a direction (7) that is orthogonal to the axial direction (5), the main spring exerting a resilient force which aims to move the parts toward a position in which the cord of the profile of the blade is orthogonal to the plane of rotation of the propeller, in the absence of part control by means of a jack.

Abstract: A part includes a structure and at least one shape memory alloy element that is prestressed and embedded at least in part within said structure. The shape memory alloy is suitable for dissipating the mechanical energy of said structure when it vibrates in a given frequency band.

Abstract: A part includes a structure and at least one shape memory alloy element that is prestressed and embedded at least in part within said structure. The shape memory alloy is suitable for dissipating the mechanical energy of said structure when it vibrates in a given frequency band.

Abstract: The invention relates to a control device (1) of the pitch of blades of a rotor of a propeller, comprising: a radial shaft (6), a pivot (8) connected to the blade, the rotation of the radial shaft (6) driving the rotation of the pivot (8) for the modification of the pitch of the blade, characterised in that it comprises: an insert (12) fixed rigidly to the pivot (8) so as to block their relative displacement, the radial shaft (6) being configured to drive in rotation the insert (12), at least one peg (24) passing through the insert (12) and the pivot (8) for transmission of the rotation of the insert (12) to the pivot (8), a heat insulation element (15) arranged between the insert (12) and the pivot (8), whereof the thermal conductivity is less than the thermal conductivity of the pivot (8) and of the radial shaft (6). The invention also relates to a propeller comprising this device.

Abstract: The control system (23) comprises a power actuator (24) coaxial with the axis of rotation (A) of the propeller, and a transmission device (25) connecting the power actuator to pivots (15), of the blades to be controlled (16), arranged substantially radially with respect to said axis of rotation. Advantageously, said actuator (24) is a rotary jack whose mobile part (28) rotates about said axis of rotation and is connected to the transmission device (25) by means of a mobile mechanical connection (34) which transforms the rotation imparted by the mobile part (28) of the jack about said axis of rotation into a rotation of the blades (16) about the axes (B) of the pivots (15) which are perpendicular to the axis of rotation (A).

Abstract: A part includes a structure and at least one shape memory alloy element that is prestressed and embedded at least in part within said structure. The shape memory alloy is suitable for dissipating the mechanical energy of said structure when it vibrates in a given frequency band.

Abstract: A method of fabricating a turbomachine rotor disk is disclosed. In the method, a metal container is defined, made up of a plurality of parts that define between them at least one annular cavity, an insert made of composite material is positioned in the at least one cavity, the assembly is subjected to hot isostatic compacting, and a rotor disk is machined.

Abstract: A process for manufacturing an integrally bladed disk for a turbomachine rotor by friction welding is disclosed. The manufacturing process includes arranging a plurality of blades in the form of a ring in a mold having symmetry of revolution; casting a degradable material, preheated to a temperature above its melting point, onto the ring of blades in the mold; extracting the molded ring which is obtained after the degradable material has solidified; welding the molded ring onto a disk; and eliminating the degradable material.

Abstract: The present invention includes a microfluidic filter and concentrator that can separate a filtrate from a fluid containing components, e.g. a suspension of particles, to be removed from the fluid at least to some extent. The filter may employ principals of tangential flow filtration, also known as cross-flow filtration. In one aspect, a microfluidic filter described herein includes at least a first, main channel and one or more secondary, filtering channels that connect to the main channel. Filtration occurs when a fluid portion of a sample that is flowed through the main channel enters one or more of the filtering channels and at least some of the components in the sample do not enter or do not flow through the secondary, filtering channels. The secondary channels may be dimensioned to inhibit flow of components through them, and/or a porous material such as a layer may be positioned to inhibit flow of components through the secondary channels.

Abstract: The present invention relates to the manufacture of an integrally bladed disk, especially for a turbomachine rotor. It relates more particularly to a process for manufacturing such a disk by friction welding. The manufacturing process comprises the following successive steps: arrangement of a plurality of blades (1) in the form of a ring in a mold (2) having symmetry of revolution; casting of a degradable material (3), preheated to a temperature above its melting point, onto the ring of blades (1) in the mold (2); extraction of the molded ring (10) obtained after the degradable material (3) has solidified; welding of the molded ring (10) onto a disk (4); and elimination of the degradable material (3). According to the invention, the welding is carried out by friction welding.

Abstract: Fabricating an IBR, in particular a two-part IBR. A metal container is defined, made up of a plurality of parts that define between them at least one annular cavity, an insert made of composite material is positioned in the or each cavity, the assembly is subjected to hot isostatic compacting, and a rotor disk is machined.