A planetary gearset including a gear arrangement including a centrally arranged sun gear rotationally fixable to a drive shaft, a set of planet gears distributed circumferentially around the sun gear, a ring gear member extending circumferentially around the planet gears, a ring gear, planet gear shafts arranged centrally in a corresponding planet gear, planet gear bearings arranged between a corresponding planet gear shaft and planet gear, wherein each planet gear shaft includes a planet gear shaft channel with an inlet opening and an outlet opening, a planet carrier connected to the set of planet gears via the planet gear shafts, wherein each planet gear shaft extends in an axial direction from the planet gear through the planet carrier and includes a protruding portion that protrudes out from the planet carrier and includes the inlet opening.

An oil transfer unit has a rotating part extending along an axis, a stationary part provided with an oil mouth, and a floating part coupled to the stationary part; the floating part is provided with a cylindrical surface fitted onto an outer cylindrical surface of the rotating part in a non-contact configuration, with an annular groove therebetween to put the oil mouth into communication with an inner chamber of the rotating part; both sides of the groove are sealed by oil films at a radial gap between the cylindrical surfaces of the floating and rotating parts; the unit has a plurality of recesses, which are delimited outwardly by the floating part and inwardly by the rotating part, are arranged on the opposite axial sides of the groove so as to locally enlarge the radial distance with respect to the radial gap and are inwardly closed by the rotating part.

An oil transfer unit has a rotating part, a stationary part provided with an oil mouth, and a floating part having a support body coupled to the stationary part; the floating part has an annular pad, that is distinct from the body and is provided with a cylindrical surface fitted onto an outer cylindrical surface of the rotating part in a non-contact configuration, with an annular groove provided between the pad and the rotating part to put the oil mouth into communication with an inner chamber of the rotating part; both sides of the groove are sealed by a hydrostatic seal between the cylindrical surfaces; an angular retaining constraint is provided to retain angularly the pad with respect to the body; at least one element is breakable or plastically deformable to release the angular constraint when the torque transferred to the body, in use, exceeds a defined threshold.

A planetary transmission includes a planetary gear set (1), another planetary gear set (2), a fluid line (3) through which fluid is flowable to the planetary gear set (1) and to the other planetary gear set (2), and a fluid collecting device (4) which is in fluid communication with the fluid line (3). The fluid collecting device (4) is connected in a rotationally fixed manner to the planetary gear set (1). The fluid collecting device (4) is configured for dividing the fluid from the fluid line (3) which has flowed into the fluid collecting device (4) into a fluid part which is flowable to the planetary gear set (1) and another fluid part which is flowable to the other planetary gear set (2).

A sun gear for a mechanical reduction gear of a turbine engine, in particular for aircraft, the sun gear having a general annular shape about an axis and comprising at the outer periphery thereof, a meshing gearing with planet gears of the reduction gear, and at the inner periphery thereof, splines for coupling with an input shaft of the reduction gear, characterised in that the sun gear has a staged profile in axial cross-section, and preferably comprises an annular recess opening radially inwards and configured to receive at least one oil jet.

A gas turbine engine according to an example of the present disclosure includes, among other things, a propulsor section including a propulsor supported on a propulsor shaft, a turbine section including a turbine shaft, and an epicyclic gear train interconnecting the propulsor shaft and the turbine shaft. The epicyclic gear train includes a sun gear coupled to the turbine shaft, intermediary gears arranged circumferentially about and meshing with the sun gear, a carrier supporting the intermediary gears, and a ring gear including first and second portions each having an inner periphery with teeth intermeshing with the intermediate gears. The first and second portions have axially opposed faces abutting one another at a radial interface and respective flanges extending along the radial interface radially outward from the teeth. The first and second portions define a trough axially between and separating the teeth of the first portion from the teeth of the second portion. The first and second portions include facing recesses that form an internal annular cavity along the radial interface.

An axle assembly having at least one lubricant passage. A differential carrier, a motor housing, and a cover may cooperate to at least partially define a first lubricant passage that routes lubricant from an axle housing to the cover. The differential carrier, motor housing, and cover may cooperate to at least partially define a second lubricant passage that routes lubricant from the cover to the axle housing.

A gear assembly for an aeronautical engine includes a first gear disposed at a centerline axis of the gear assembly, a second gear coupled to the first gear in adjacent radial arrangement to form a first mesh between the first gear and the second gear, a static portion coupled to the second gear in adjacent circumferential arrangement, the static portion defining a pocket, and a spraybar disposed within the static portion such that a supply opening of the spraybar is directed at the first mesh between the first gear and the second gear. The supply opening provides a flow of lubricant to the first mesh between the first gear and the second gear and at least a portion of the flow of lubricant is collected by the pocket. The flow of lubricant is continuously released from the pocket to the gear system.

An annular cap for collecting lubricating oil for turbomachine equipment is configured to extend around the equipment and to rotate about an axis. The cap includes through-orifices through which the oil can pass radially under the effect of spinning. The cap further includes means of deflecting the oil leaving the orifices in a direction substantially transverse to the axis and substantially tangential to the cap.

An axial bearing arrangement formed substantially of two rotating carrier components (1, 2) with circular ring-shaped end faces (3, 4) and an axial anti-friction bearing (5) arranged between the carrier components (1, 2). This axial anti-friction bearing (5) has a first ring-shaped angle disk (6), which rests on the end face (3) of the first carrier component (1) and which is made from a thin steel sheet, and a second ring shaped angle disk (7), which rests on the end face (4) of the second carrier component (2) and a needle cage (10), which rolls between the axial inner sides (8, 9) of the angle disks (6, 7) and which is formed from a plurality of bearing needles (12) arranged adjacent to one another and held at equal distances to one another by a bearing cage (11), and is lubricated and cooled by a lubricant flow (13) emitted by a shaft which passes centrally through the axial anti-friction bearing (5). According to the invention, a circular ring-shaped ramp disk (14), which is designed as a spring, is arranged between the first carrier component (1) and the first angle disk (6), by which ramp disk a radial annual gap (15) between the first carrier component (1) and the first angle disk (6), which results from the axial clearance of the axial anti-friction bearing (5) in the no-load state, can be sealed to prevent a wrong direction of the lubricant flow (13) and the lubricant flow (13) at the same time, can be systematically routed into the inside of the bearing (16) between the angle disks (6, 7).