Abstract: An aircraft turbomachine (10) comprising a gas generator (12) and a fan (14) located upstream of the gas generator and surrounded by a fan casing (16), the gas generator comprising a high-pressure body (12b) and a low-pressure body (12a) which is connected to a shaft of the fan (32), the high- and low-pressure bodies comprising compressors (22, 20) between which is located an intermediate casing (40) which connects the gas generator to said fan casing, the turbomachine further comprising first decoupling means (60) configured to disconnect the fan shaft from the low-pressure body, following a detection of a critical event, characterised in that it comprises second decoupling means configured to disconnect a blades stator from the compressor of the low-pressure body opposite the intermediate casing, these second fixing means comprising fusible means (62) for fixing the bladed stator to the intermediate casing.

Abstract: Method for establishing a sizing specification for an equipment intended to be mounted on a turbomachine structure such as a casing, the method comprising the following steps: selecting (S8) an incident likely to occur on the structure, such as the loss of a rotor element of the turbomachine; simulating (S14) the presence of the equipment on the structure, at an attachment point, by means of a mechanical oscillator having at least a natural frequency (f0) and at least a damping rate (?); varying the natural frequency and/or damping rate according to at least two values; determining (S18) a sizing acceleration for the mechanical oscillator in response to the incident for each of said values of the natural frequency and damping rate; delivering (S20) the specification comprising the sizing accelerations and the corresponding natural frequency and damping rate values.

Abstract: An aircraft turbomachine (10) comprising a gas generator (12) and a fan (14) located upstream of the gas generator and surrounded by a fan casing (16), the gas generator comprising a high-pressure body (12b) and a low-pressure body (12a) which is connected to a shaft of the fan (32), the high- and low-pressure bodies comprising compressors (22, 20) between which is located an intermediate casing (40) which connects the gas generator to said fan casing, the turbomachine further comprising first decoupling means (60) configured to disconnect the fan shaft from the low-pressure body, following a detection of a critical event, characterised in that it comprises second decoupling means configured to disconnect a blades stator from the compressor of the low-pressure body opposite the intermediate casing, these second fixing means comprising fusible means (62) for fixing the bladed stator to the intermediate casing.

Abstract: A power transmission system for a turbine engine is provided. The power transmission system includes a transmission shaft that is connected to a drive shaft by bevel gears, and that drives equipment or accessories. The transmission shaft is designed to operate under supercritical conditions and includes a damper system for damping vibration at its resonant speed.

Abstract: The invention relates to a power transmission system, in particular for a turbine engine such as an airplane turboprop or turbojet, the system comprising a transmission shaft (40) connected to a drive shaft (31) by connection means (30), such as bevel gears, and that drive equipment or accessories. The transmission shaft (40) is designed to operate under supercritical conditions and includes damper means for damping vibration at its resonant speed.

Abstract: A shaft mounted to rotate with respect to another fixed or rotary element of a rotary engine to which the shaft is connected by at least one bearing, it being possible for the engine to operate in at least two different operating speeds, the shaft comprising a connection to the bearing that has a state of stiffness that varies with engine operating speed. The connection comprises a squirrel cage comprising at least two points of attachment, one to the bearing and one to the shaft, between which points there extends a flexible portion, the shaft comprises an actuator able to adopt at least two positions for controlling the state of stiffness of the squirrel cage, the actuator comprises a piston designed to be displaced by oil pressure in a chamber formed between the piston and shaft from a rigid state of stiffness position to a soft state of stiffness position.

Abstract: The rotary engine of the invention comprises at least a shaft, mounted to rotate with respect to another element of the engine, fixed or rotary, to which it is connected by at least one bearing, it being possible for the engine to operate in at least two different operating speeds, the shaft comprising means of connection to the bearing that have a state of stiffness that can vary with the engine operating speed.