Abstract: An arming and safety device for a pyrotechnic chain, the device including a housing presenting an inlet zone for a pyrotechnic stream and an outlet zone for the pyrotechnic stream, an arming element housed in the housing between the inlet and outlet zones and adapted to move between a disarmed position in which it blocks the passage of the pyrotechnic stream and an armed position in which it allows the pyrotechnic stream to pass, and an electric motor for driving the arming element. The stator of the electric motor is situated outside the housing, and the rotor is contained entirely inside the housing.

Abstract: An assembly for a stator stage of a turbomachine is disclosed. The assembly includes: an outer shroud presenting a series of openings for mounting each stationary vane by welding between the edge of an opening and the outline of the platform of the vane, the outline of the outer segment of an opening surrounding, in radial projection, the outline of the inner segment thereof, the shroud not having any other holes; and at least one stationary vane with its top including a non-pierced platform received in one of the openings prior to the welding step, such that an inside face of the platform bears against a bearing face of the shroud, the outline of the platform presenting a shape that is identical to the shape of the outline of the opening.

Abstract: A platform for a bladed wheel of a turbomachine including a drum and blades of hammer-head attachment type, the foot of which is retained in a circumferential groove of the drum, having bearing and/or retaining faces cooperating with the drum is disclosed. The platform includes at least two openings spaced apart circumferentially and each able to receive the foot of a blade, whereby it constitutes a multiple-blade platform in the form of a piece separate from the blades.

Abstract: A system for connecting two substantially tubular members, particularly ferrules of an axial compressor case, is disclosed. The system includes two flanges, where each flange has a proximal face and a distal face; securing members for clamping distal faces one against the other having a junction latch adapted to be housed into at least one cavity; and at least one collar having two side faces provided so as to abut against the flange proximal faces.

Abstract: Use of the stator blade platforms for the deposition of a track of adjacent abradable material inside an external turbomachine shell is disclosed. The stator blades are attached to the shell so as to define an annular edge that is substantially continuous and the abradable material is deposited using this edge to delimit a boundary of the track of abradable material.

Abstract: A system for connecting two ferrules in an axial compressor case is disclosed. Each of the ferrules includes a substantially annular flange with a proximal face adapted to be integral with the ferrule, and a distal face. The system further includes securing members for clamping distal faces of both flanges one against the other. The securing members include at least one pair of jaws provided for being connected by a set of tensile members, each of the jaws of the pair being provided for abutting against the proximal face of one of the flanges. At least one jaw of the pair further includes a portion, such as substantially radial shoulders, provided for forming a positive connection with complementary portions in both flanges for a transmission of circumferential stresses between both flanges.

Abstract: A system for connecting two ferrules of an axial compressor case. A ferrule includes a female flange, while the other ferrule includes a male flange. Both the female flange as well as the male flange are substantially annular and include a proximal face intended to be integral with the ferrule, and a distal face. The male flange is intended to be introduced into a space bound by an axial extension of the female flange. The system further includes a trim intended to be introduced behind the male flange into the space and clamped between the proximal face of the male flange and a surface of the extension substantially opposite in order to space them apart and thus clamp the distal faces of both flanges one against the other.

Abstract: The invention concerns a novel type of turbomachine. The stator of the turbomachine comprises a plurality of profiled members forming stiffeners arranged on the blade stage. The profiled members are distributed uniformly at periphery of the blade stage and individually between two consecutive blades. The stiffeners are fixed to the internal and external ferrules of the stator in order to uniformly increase the axial and radial stiffness of the stator in normal operation of the turbomachine and to allow the internal ferrules to have a limited displacement during the normal functioning of the turbomachine. This makes it possible to reduce the axial sizing of the turbomachine, and consequently its mass.

Abstract: A straightener blade for a turbomachine, comprising a platform arranged at a radially external end of the blade and adapted to be engaged in a annular groove of a housing, and a threaded rod radially extending outwardly from the platform and adapted to pass through an orifice of the housing in order to receive a fixing nut, the upstream and downstream edges of the platform each comprising a protrusion extending in the plan of the platform in order to limit the rotation of the platform in the groove when the nut screwed on the threaded rod is tightened.

Abstract: The invention relates to an assembly for a stator stage of a turbomachine, the assembly comprising: an outer shroud presenting a series of openings for mounting each stationary vane by welding between the edge of an opening and the outline of the platform of the vane, the outline of the outer segment of an opening surrounding, in radial projection, the outline of the inner segment thereof, the shroud not having any other holes; and at least one stationary vane with its top including a non-pierced platform received in one of said openings prior to the welding step, such that an inside face of the platform bears against a bearing face of the shroud, the outline of the platform presenting a shape that is identical to the shape of the outline of the opening. The invention is applicable to the stator stage of an axial compressor or a turbine of a turbomachine.

Abstract: A turbo-engine stator blading is disclosed. The turbo-engine stator blading includes a crown of fixed blades mounted on a ring. Each blade includes a platform and each blade is fastened to the ring. The ring includes a plurality of individual receptacles for the each of the platforms, the receptacles being machined in the thickness of the ring, the form of each receptacle being complementary to that of the corresponding platform. By means of the receptacles, the mounting of the blades within the blading is both simple and accurate.

Abstract: A method and a system for lubricating a turbomachine including an oil tank, an oil feed pump, an oil/air separator, and at least two enclosures closed by air flow rate seals, each including a low outlet and housing shaft-supporting rolling bearings. The method injects oil from the tank into the enclosures by the pump to lubricate the bearings, introduces compressed air at a low flow rate into the enclosures via the seals to pressurize the enclosures, recuperates all of the air and the oil introduced into the enclosures via their low outlet, uses gravity and the pressurization of the enclosures to convey the oil/air mixture as recovered in this way to the oil/air separator, separates the oil and the air of the mixture by the oil/air separator, returns the oil to the tank, and exhausts the air to outside the turbomachine.

Abstract: The invention relates to a platform (150) for a bladed wheel of a turbomachine comprising a drum (130) and blades (120) of hammer-head attachment type, the foot (122) of which is retained in a circumferential groove (131) of the drum (130), having bearing and/or retaining faces cooperating with the drum (130). Characteristically, the platform (150) comprises at least two openings (151) spaced apart circumferentially and each able to receive the foot of a blade (120), whereby it constitutes a multiple-blade platform in the form of a piece separate from the blades (120). Applicable to a bladed wheel or a turbomachine compressor.

Abstract: Use of the stator blade platforms for the deposition of a track of adjacent abradable material inside an external turbomachine shell. The stator blades (13) are attached to the shell (11) so as to define an annular edge (33) that is substantially continuous and the abradable material is deposited using this edge to delimit a boundary of said track of abradable material (15).

Abstract: The invention concerns a novel type of turbomachine. According to the invention, the stator of the turbomachine comprises a plurality P of profiled members forming stiffeners arranged on the blade stage while being distributed uniformly at its periphery and individually between two consecutive blades, the stiffeners being fixed to the internal and external ferrules of the stator in order to uniformly increase the axial and radial stiffness of the stator in normal operation of the turbomachine and to allow to the internal ferrules to have. The invention makes it possible to reduce the axial sizing of the turbomachine, and consequently its mass. Application to aircraft engines, such as jet engines.

Abstract: The invention relates to an air-oil heat exchanger located at the inner shroud of the secondary duct of a turbojet. In characteristic manner, it comprises an oil circuit placed inside the separator nose and fins placed outside the top wall of the separator nose, between the leading edge of the separator nose and the outlet guide vanes.

Abstract: A straightener blade for a turbomachine, comprising a platform arranged at a radially external end of the blade and adapted to be engaged in a annular groove of a housing, and a threaded rod radially extending outwardly from the platform and adapted to pass through an orifice of the housing in order to receive a fixing nut, the upstream and downstream edges of the platform each comprising a protrusion extending in the plan of the platform in order to limit the rotation of the platform in the groove when the nut screwed on the threaded rod is tightened.

Abstract: A system for connecting two substantially tubular members, in particular ferrules of an axial compressor case, comprising two flanges, each comprising a proximal face and a distal face and securing members for clamping distal faces one against the other comprising a junction latch adapted to be housed into at least one cavity and at least one collar having two side faces provided so as to abut against the proximal faces.

Abstract: This invention relates to a system for connecting two ferrules of an axial compressor case. A ferrule comprises a female flange, while the other ferrule comprises a male flange. Both the female flange as well as the male flange are substantially annular and comprise a proximal face intended to be integral with the ferrule, and a distal face. The male flange is intended to be introduced into a space bound by an axial extension of the female flange. The system further comprises a trim intended to be introduced behind the male flange into the space and clamped between the proximal face of the male flange and a surface of the extension substantially opposite in order to space them apart and thus clamp the distal faces of both flanges one against the other.

Abstract: This invention relates to a system for connecting two ferrules in an axial compressor case. Each of the ferrules comprises a substantially annular flange and comprising a proximal face adapted to be integral with the ferrule, and a distal face. The system further comprises securing members for clamping distal faces of both flanges one against the other. Said securing members comprise at least one pair of jaws provided for being connected by a set of tensile members, each of the jaws of said pair being provided for abutting against the proximal face of one of the flanges. At least one jaw of said pair further comprises means, such as substantially radial shoulders, provided for forming a positive connection with complementary means in both flanges for a transmission of circumferential stresses between both flanges.