Abstract: The invention concerns a controllable variable length link device. It comprises a first half-link (12) having a first end (12a) for connection to a driving system (16) and a second end (12b), a second half-link (14) having a first end (14a) for connection to a driven system (18) and a second end (14b), a rotary displacement member (20) including a rotator shaft (22) and a rotary head (24, 26) cooperating with said second ends (12b, 14b) of said links to bring about opposite movement of said half-links, bearing means (34, 36) in which said rotator shaft (22) is mounted, respective means (38, 40) for guiding said two half-links (12, 14) in translation in at least two parallel directions, said drive means being mechanically connected to said bearing means; and means for driving said shaft (22) in rotation in both directions in accordance with a predetermined law.

Abstract: A pivot bushing for a variable-pitch vane of a turbomachine, the bushing being for mounting in a recess in a ring of the turbomachine, the recess being of a shape that is substantially complementary to the shape of the bushing. The bushing comprises a substantially tubular body of longitudinal axis provided at one end with a first conical collar and at an opposite end with a second conical collar, the conical surfaces defined by the first and second collars being disposed facing each other.

Abstract: A bushing for a variable-pitch vane pivot in a turbomachine, the bushing being for mounting in a recess in a ring of the turbomachine, the recess being of a shape that is substantially complementary to the shape of the bushing, the bushing comprising a body that is substantially tubular having a longitudinal axis, and at least three branches extending radially outwards relative to the longitudinal axis of the tubular body, and axially over the full height of said tubular body, said branches being distributed in substantially equidistant manner around the circumference of the tubular body.

Abstract: A system for controlling two stages of variable-pitch stator vanes of a turbomachine, the system comprising a drive element for turning the control ring of one of the stages via a leader member pivotally mounted on the casing, a synchronization bar for transmitting the turning movement of the ring driven by the drive element to the control ring of the other stage via a follower member pivotally mounted on the casing, and an additional pivot member interposed between the follower member and the follower ring, said additional pivot member being pivotally mounted on the follower member and being connected to the casing by a wheel sliding in a slot secured to the casing.

Abstract: A system for controlling two stages of variable-pitch stator vanes of a turbomachine, the system comprising a drive element for turning the control ring of one of the stages via a leader member pivotally mounted on the casing, a synchronization bar for transmitting the turning movement of the ring driven by the drive element to the control ring of the other stage via a follower member pivotally mounted on the casing, and an additional pivot member interposed between the follower member and the follower ring, said additional pivot member being pivotally mounted both on the casing and on the follower member.

Abstract: Member (1) for the guidance of a movable piece, comprising at least one surface (12, 14) in friction and sliding contact with a complementary surface of the movable piece, consisting of several separate ceramic elements (2, 4) carried by a support (20) having resilience characteristics, for example made of elastomer.

Abstract: A variable-pitch stator vane stage in which said vanes are moved by a rotary actuator ring driven by an electric motor. The outer actuator ring is connected by cranks to the vanes and is constrained to move in rotation only, centered on the axis of the turbomachine; the drive system comprises two coaxial portions, an inner portion secured to the casing and an outer portion including the actuator ring, with an electrical drive unit being arranged between the two portions.

Abstract: Assembling a plurality of parts together in a manner that enables a device of complex shape to be reconstituted. At least one of the parts includes two ribs in a chevron configuration and at least one other part includes two grooves in a chevron configuration, the ribs and the grooves being complementary in shape and of corresponding dimensions.

Abstract: A rigid connection of constant length between two moving parts is made adjustable by a device comprising a link installed between the two parts and hinged by a clevis to one of the parts via a hinge pin that is provided with an eccentric portion of angular position that is adjustable by means of two corrugated washers.

Abstract: A variable pitch stator vane stage, said vanes being moved by an automatically-centered rotary actuator ring. The casing carries a stationary coaxial annular rail projecting from its outside surface, and circumferentially spaced apart moving equipments are provided that are constrained to move along said rail, each moving equipment being coupled to the actuator ring via a radial guide arrangement.

Abstract: A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link, connection means forming a hinge between a first end of the link and a control ring, fixing means for fixing a second end of the link on a pivot of a vane to be controlled, and pinch means acting transversely relative to a longitudinal midplane of the link to lock the second end of the link in rotation without slack on the pivot.

Abstract: A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link, connection means forming a hinge between a first end of the link and a control ring, and fixing means for fixing a second end of the link on a pivot of a vane to be controlled, a radial recess formed in the vane pivot for receiving the second end of the link, the recess having at least one plane edge inclined relative to a longitudinal midplane of the recess and co-operating with a corresponding inclined edge of the second end of the link, and a clamping cap bearing against the second end of the link and on which the fixing means act, the clamping cap having an inside surface providing plane contact with the outside face of the second end of the link in order to maintain the second end of the link against the vane pivot without slack by means of contact between theinclined edges.

Abstract: A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link, connection means forming a hinge between a first end of the link and a control ring, and fixing means for fixing a second end of the link on a pivot of a vane to be controlled, a radial recess formed in the vane pivot for receiving the second end of the link, the recess having at least one plane edge inclined relative to a longitudinal midplane of the recess and co-operating with a corresponding inclined edge of the second end of the link, and a clamping cap bearing against the second end of the link and on which the fixing means act, the clamping cap having an inside surface providing plane contact with the outside face of the second end of the link in order to maintain the second end of the link against the vane pivot without slack by means of contact between the-inclined edges.

Abstract: A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link, connection means forming a hinge between a first end of the link and a control ring, fixing means for fixing a second end of the link on a pivot of a vane to be controlled, and pinch means acting transversely relative to a longitudinal midplane of the link to lock the second end of the link in rotation without slack on the pivot.

Abstract: A sealing and retention device for the blades of a rotor which engage with axial pin settings of the rotor wherein the device includes, in a first embodiment, a flange in the shape of a circular collar which engages the rotor and a locking ring which engages the blades and the flange wherein the locking ring has a conical portion which engages a first protuberance portion of the blades such that upon centrifugal sliding of the locking ring in a radially outward direction, the locking ring is axially displaced toward the flange. The device may also include a conical crest located on the rotor and the flange may have a conical surface for engaging the conical crest of the rotor.

Abstract: A system for locking turbine blades onto a turbine wheel is disclosed in which a locking member is disposed totally radially inwardly of the turbine blade platforms, thereby enabling the platforms to define a continuous annular wall. Turbine blades are each inserted through a "window" and circumferentially displaced in a turbine wheel groove until space remains on the circumference of the turbine wheel for three turbine blades. The locking device cooperates with the last three turbine blades to lock the blades in position on the turbine wheel. The locking device is resiliently deformable and has a central portion having a cross-sectional shape generally similar to that of the circumferential groove. Locking flanges extend in an axial direction from the center section and engage locking notches defined by circumferentially extending ribs formed on the turbine wheel on either side of the circumferential groove.

Abstract: The invention concerns the fastening of a gasket to the inner flange of a stributor of a turbine engine. According to the invention, a ring support has a flange which in turn has a plurality of cutouts arranged to coincide with corresponding cutouts provided in the flange of the distributor. U-shaped clips hold the two flanges together by embracing of the flanges at edges of the cutouts and at the level of the cutouts and are retained in place by a latch.