A rotary machine includes a fixed internal body, a rotating external body and a lubrication system to lubricate one or more components of the internal body or external body during rotation. The lubrication system includes: an inlet conduit for a lubricant, formed in the internal body; one or more distribution conduits for the lubricant; a lubricant collection chamber between the external body and the internal body; and an outlet conduit communicating with the collection chamber.

An oil distribution system for a casing having at least one component to be supplied with oil in the interior of the casing, where the oil can be fed into the interior of the casing by at least one distribution device and where during operation the oil is conveyed by a centrifugal force to the at least one component, including at least one seal, in particular a contact seal or labyrinth seal for sealing off the casing from the environment, with the at least one seal being designed and/or arranged in the oil distribution system such that during operation it releases, due to the centrifugal force, at least one sealing gap for pressure equalization to provide a connection between the interior of the casing and the environment. Furthermore, the invention relates to an aircraft engine.

A fluid delivery assembly for delivering fluid to a component in a gas turbine engine includes a rotating shaft having a central bore and at least one fluid exhaust in communication with the central bore for centrifugally expelling fluid, and a delivery scoop disposed around the rotating shaft and spaced apart from the rotating shaft by an annular gap. The delivery scoop includes an annular body having at least one impingement surface facing the at least one fluid exhaust and configured to scoop the fluid expelled by the at least one fluid exhaust. The impingement surface has at least one outlet for delivering the scooped fluid to the component. A method of delivering pressurised fluid in a fluid system is also presented.

An auxiliary oil supply apparatus for a rotating device (50, 51), the rotating device comprising a primary oil supply (52), a rotating component (50) and a static component (51) situated radially outwardly of a centre of rotation of the rotating component (50) and arranged to collect oil (58) held radially outwardly from the rotating component (50) as the rotating component rotates. The auxiliary oil apparatus comprises a scoop (56) associated with the rotating component (50) and is responsive to a change in a known parameter to move between a first position in the static component (51) to a second position between the static component (51) and the centre of rotation.

A wind turbine drive train component (22) comprising a rotating shaft (61) with a radial seal (50) is provided. The radial seal (50) comprises a stationary part and a rotating part. The stationary part comprises a ring (51) with an inner edge and an outer edge, the inner edge being configured for contactlessly surrounding the shaft (61). The rotary part comprising a disc (52), coaxially connected to the shaft (61) for rotation therewith and comprising a flange (53) that wraps around the outer edge of the ring (51). The radial seal (50) further comprises an annular air lock gap (55) for containing an amount of lubrication fluid (64) and thereby closing off the air lock gap (55) when the rotary part rotates at a rotational speed above a predetermined threshold speed, the annular air lock gap (55) being formed by an inner surface of the flange (53), an outer part of the opposing parallel surface of the disc (52) and the outer edge of the ring (51).

According to an aspect, a method of providing internal shaft lubrication includes drip feeding a lubricant to a feed tube within a central bore of a shaft body. The lubricant is urged along a lubrication flow path including at least one rifling groove on an inner wall of the shaft body formed by the central bore and a plurality of lubrication holes axially distributed along the shaft body that fluidically connects the inner wall with an outer wall of the shaft body. The lubricant is sprayed out of the lubrication holes responsive to rotation of the shaft body.

A gear device with at least one rotating structural component, with a further structural component that delimits at least one supply area and with at least one consumption point that is to be supplied with hydraulic fluid via the supply area. Hydraulic fluid from at least one hydraulic fluid supply device can be introduced into the at least supply area via at least one supply opening, and can be discharged via at least one outlet opening from the at least one supply area for supplying the at least one consumption point. Inside the supply area, at least one pumping appliance driven by the structural component is provided for transporting hydraulic fluid from the at least one supply opening in the direction of the at least one outlet opening.

A gear box assembly includes an outer housing and a gear box shaft at least partially disposed in the outer housing. The gear box shaft includes an interior region, a reservoir dam that separates the interior region into a reservoir volume and a spline volume and one or more gear box shaft venting holes formed through the gear box shaft near an end thereof. The assembly also includes a regulator disposed at least partially within the gear box shaft, the regulator including one or more regulator vent holes, wherein at least one of the regulator venting holes is in fluid communication with one of the one or more gear box shaft vent holes.

An example lubrication system for a rotating component has a primary lubrication system providing continuous lubrication during normal operation of the rotating component and secondary lubrication system with a reservoir co-rotating with the component. The reservoir is continuously replenished from the primary lubrication system during normal operation of the rotating system, with the lubricant being forced through a discharge orifice by the centrifugal force generated by the rotation toward, for example, a bearing or a gear. When the primary pressurized lubrication system fails, lubrication will continue to be provided by the lubricant in the supplemental lubricant reservoir while the rotation speed or power supplied to the shaft is controllably decreased in an emergency.

The invention relates to a refrigerant compressor, comprising: a preferably hermetically sealable compressor housing; an electric drive unit, comprising a rotor (4) and a stator (3); a crankshaft (1), which is connected to the rotor (4) for conjoint rotation and which has a longitudinal axis (2); a piston-cylinder unit, which can be driven by the crankshaft (1); wherein the electric drive unit is designed as an external rotor motor and the rotor (4) has a carrier element (12) extending outward radially with respect to the longitudinal axis (2) at least in some sections and the carrier element (12) is connected to the crankshaft (1) for conjoint rotation. According to the invention, in order to enable an increased delivery rate of lubricant from a lubricant sump together with preferably low or reduced height of the compressor, a sleeve-shaped lubricant receiver (8) for centrifugally conveying lubricant from a lubricant sump formed in a bottom region of the compressor housing toward the piston-cylinder unit is provided on a side of the carrier element (12) facing away from the piston-cylinder unit (5), the sleeve-shaped lubricant receiver (8) being joined to the carrier element (12) for conjoint rotation.