Rotating coalescer elements that maximize the radial-projected separation surface area in a given (rotating) cylindrical volume, where flow to be cleaned is passing axially upward or downward through a separating media of the rotating coalescer element. Various example package assemblies are provided with various types of rotating configurations including cylindrical coiled media packs, frustum coiled media packs, concentric cylinders, coiled metal or polymer films with and without perforations, and/or alternating layers of different materials. The described rotating coalescers may be driven by hydraulic turbine, electric motor, belt, gear or by mounting on rotating machine components, such as rotating engine shafts or connected components.

A turbine having a turbine wheel, as used for example as a drive for active oil separators, and to a liquid separator using the turbine is described.

Various example embodiments relate to rotating coalescers. One embodiment includes a housing comprising a first housing section having a blowby gas inlet structured to receive crankcase blowby gases from a crankcase. The housing further comprises an oil outlet. The rotating coalescer includes an endcap and filter media. The filter media is arranged in a cylindrical shape and is coupled to and positioned between the first housing section and endcap. The filter media is structured to filter the crankcase blowby gases passing through the filter media by coalescing and separating oils and aerosols contained in the crankcase blowby gases. The rotating coalescer includes a hollow shaft extending through the housing and positioned radially inside of the filter media. The hollow shaft forms a blowby gas outlet structured to route filtered crankcase blowby gases out of the housing. The rotating coalescer further includes a drive mechanism operatively coupled to the hollow shaft.

An oil separator for separating oil droplets and/or oil mist from gases, in particular from blow-by gases of an internal combustion engine is described.

A centrifugal separator structure is configured for cleaning of crankcase gases from an internal combustion engine. The centrifugal separator structure includes a separator rotor configured for rotation about a centre axis arranged inside a stationary housing. The separator rotor includes an axle member configured for connection to a shaft of a driving device. A stack of separation discs is supported on the axle member. The axle member is un-journaled inside the stationary housing when the centrifugal separator structure is separate from the driving device. Further, an assembly includes the centrifugal separator structure and a driving device.

An oil separator with a housing, in which is rotatably mounted a rotor containing a drive element, an oil separating element and a shaft for driving the oil separating element of the rotor via the shaft of the rotor around the shaft axis. At least one element of the rotor is seated in such a way that it is displaceable via an actuator element axially from a first inoperative positive to a second operating position.

An oil separator for separating oil mist and/or oil droplets out of gases to be cleaned is described. A ventilation system that has the oil separator that may be used with an internal combustion engine is also described.

A part for a centrifugal breather for an air/oil mixture of a turbomachine is configured to rotate about a longitudinal axis of symmetry. The breather forms an annular chamber for centrifugal separation of said mixture. The chamber includes mesh structure that takes up at least one space in a duct which closes communication between an axial inlet and an internal radial outlet. The mesh structure is formed by the spatial repetition of the material or of the space of a single pattern produced by the interconnection of simple shapes. The pattern is designed such that the spaces between the materials paths passing through the materials in at least three dimensions of space forming a trihedron.

A gas and liquid separation system could be said to have a passage with an inlet connected to receive a mixed gas and liquid flow. An air separation tube extends into the passage at a location downstream of where the inlet is connected with an upstream tube end upstream in the passage relative to a downstream tube end. The upstream tube end provides an obstruction to the mixed gas and liquid flow, to cause separation of the gas from the mixed gas and liquid flow. A liquid tube is connected to the passage at a location downstream of the air separation tube.

A centrifugal separator for separating blow-by gases into cleaned air and liquid for recirculation through an engine.