An epicyclic gearbox is configured to transfer rotational motion between a first rotating component and a second rotating component of the gas turbine engine. The gearbox includes a centrally located sun gear, two or more planet gears circumscribing the sun gear, and a ring gear circumscribing the plurality of planet gears. The gearbox is configured such that the sun gear is drivingly coupled to the first rotating component, such that rotation of the sun gear causes rotation of each planet gear, and such that the ring gear rotates relative to the plurality of planet gears. The gearbox includes one or more shape memory alloy dampers provided in association with the sun gear, the ring gear, and/or the plurality of planet gears. The shape memory alloy damper(s) is configured in order to reduce vibrations transferred through the epicyclic gearbox to the frame, the first rotating component, and/or the second rotating component.

A geared motor includes a gear unit having a first intermediate shaft, an input shaft and an output shaft. The gear unit has two connection surfaces set apart from each other to which a device to be driven by the gear unit is connectable to the gear unit, each connection surface having a drilling pattern. The housing part is asymmetrical such that the plane whose normal direction is aligned in parallel with the axis of rotation of the first intermediate shaft and includes the axis of rotation of the input shaft, is no plane of symmetry in relation to the entire outer surface of the housing part and also no plane of symmetry in relation to the housing wall of the housing part. The plane is a plane of symmetry with regard to the two connection surfaces together with their drilling patterns.

The disclosure provides rotary machines that include, in one embodiment, a shaft defining a central axis A, the shaft having a first end and a second end. The shaft can have a first gearbox disposed thereon defining one or more cavities therein. At least one contour is slidably received into an arcuate cavity in an exterior surface of the gearbox. The contour has a convex outer surface that cooperates with an inwardly facing curved surface of a housing to form a working volume. A gearbox mechanism consisting of gears, crankshafts, bearings and connecting rod creates an oscillatory motion 2 times per revolution such that the contour can navigate about the arcuate cavity without contacting the cavity at a high rate of rotating speed. Thus, said working volume can expand and compresses twice per rotatable shaft revolution.

A planetary gear box, which has a sun gear, a plurality of planet gears, a ring gear, a plurality of planet pins an axially front carrier plate and an axially rear carrier plate, wherein the planet pins are connected to the carrier plates. Provision is made whereby the planet pins, at their axial ends, have in each case one platform, radially oriented slots are formed on the carrier plates, and the platforms are pushed via guide grooves into the radially oriented slots. The invention furthermore relates to a method for the assembly of a planetary gear box.

A gas turbine engine for an aircraft includes an engine core with a turbine, a compressor, and a core shaft connecting the turbine and compressor; a fan upstream of the engine core including a plurality of fan blades; and a gearbox that receives an input from a gearbox input shaft portion of the core shaft and outputs drive to a fan shaft so as to drive the fan at a lower rotational speed than the core shaft, the gearbox being an epicyclic gearbox including a sun gear, a plurality of planet gears, a ring gear, and a planet carrier arranged to have the plurality of planet gears mounted thereon, and wherein the sun gear receives input from the core shaft. At cruise conditions the torque on the core shaft is greater than 10,000 Nm and a ratio of core shaft stiffness to core shaft torque is within a specified range.

A combined cycle power generation system for an aircraft includes fuel cell and supercritical CO.sub.2 cycles. The fuel cell cycle includes a compressor and turbine disposed on a first shaft, a fuel cell in fluid communication with the compressor and a fuel source, and a combustor in fluid communication with the fuel cell and the turbine. The combustor is configured to combust partially spent fuel from the fuel cell and produce combustion exhaust gas for delivery to the turbine. The supercritical CO.sub.2 cycle includes a compressor and turbine disposed on a second shaft, a supercritical CO.sub.2 fluid circuit in thermal communication with the combustor and configured to deliver CO.sub.2 to the turbine and compressor, and a heat exchanger in thermal communication with the supercritical CO.sub.2 fluid circuit and a source of cooling fluid. A mechanical linkage is configured to transfer power from the second shaft to the first shaft.

An actuation system includes a power drive unit that drives a plurality of drive shafts that each has a first end individually connected to the power drive unit. The power drive unit includes a geartrain including a plurality of individual gears that are offset relative to each other along the gearbox, and a motor-driven rotation of one of the plurality of individual gears drives rotation of the other individual gears, and each of the plurality of individual gears rotates to drive rotation of a respective one of the plurality of drive shafts. A plurality of torque brakes is mounted to the gearbox, the torque brakes being mechanically coupled to respective individual gears and drive shafts. When the torque being passed through is above a predetermined threshold value, a locking of one of the torque brakes stops rotation of all gears simultaneously to maintain positional symmetry in the actuation system.

The present invention includes a cooling system for a gearbox, the cooling system comprising: a pressurized housing in fluid communication with the gearbox configured to circulate a pressurized lubricant; and one or more cooling fins about the pressurized housing, wherein heat from the pressurized lubricant within the pressurized housing is actively convected through the one or more cooling fins.

A vibration damping component, comprising a hydraulic cylinder and a hydraulic motor; The hydraulic oil cylinder comprises an oil storage cylinder and a working cylinder, wherein the working cylinder is internally provided with a first piston piece and is divided into an expansion cavity and a contraction cavity by means of the first piston piece; the expansion connects the oil storage cylinder by means of a first one-way oil discharge; the contraction connects the oil storage cylinder by means of a second one-way oil discharge; the oil storage cylinder is provided thereon with an oil outlet hole; an input end of the hydraulic motor is connected to the oil outlet hole; and an output end of the hydraulic motor is in communication respectively with the expansion by means of a first one-way oil return pipe and with the contraction by means of a second one-way oil return pipe.

A geared motor includes a gear unit having a first intermediate shaft, an input shaft and an output shaft. The gear unit has two connection surfaces set apart from each other to which a device to be driven by the gear unit is connectable to the gear unit, each connection surface having a drilling pattern. The housing part is asymmetrical such that the plane whose normal direction is aligned in parallel with the axis of rotation of the first intermediate shaft and includes the axis of rotation of the input shaft, is no plane of symmetry in relation to the entire outer surface of the housing part and also no plane of symmetry in relation to the housing wall of the housing part. The plane is a plane of symmetry with regard to the two connection surfaces together with their drilling patterns.