Abstract: A centrifugal separator for cleaning gas containing contaminants including a stationary casing, enclosing a separation space through which a gas flow is permitted, said stationary casing comprising a surrounding side wall, an upper end wall and a lower end wall, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member comprising a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation, a gas outlet arranged in the stationary casing and configured to permit discharge of cleaned gas and comprising an outlet opening through a wall of the stationary casing, a drainage outlet arranged in a lower portion of the stationary casing and configured to permit discharge of liquid contaminants separated from the gas to be cleaned, a drive member for rotating the rotating member, wherein the centrifugal separator further comprises at least one guiding vane arranged for guiding separated liquid impu

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing module including a surrounding side wall enclosing a separation space through which a gas flow is permitted, a gas outlet for cleaned gas, and at least one drainage opening for draining separated liquid contaminants from a lower portion of the stationary casing module; a rotating module including a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation; a drive member arranged for rotating the rotating module around the axis of rotation; and an inlet module arranged axially above the stationary casing module, including an inlet pipe for supply of the gas to be cleaned to the inlet module. The inlet module is in fluid contact with the separation space and a liquid outlet module arranged axially below the stationary casing module and configured to permit discharge of liquid contaminants drained from the stationary casing module.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, a gas inlet, a rotating member, a gas outlet including an outlet opening through a wall of the stationary casing, a drainage outlet arranged in the lower portion of the stationary casing, a drive member for rotating the rotating member, and a stationary axial surface extending into the separation space. The rotating member includes a rotatable axial surface arranged radially outside the stationary axial surface. The rotatable axial surface is arranged at the gas inlet such that liquid contaminants present in the gas to be cleaned is pressed against the rotatable axial surface during operation. The rotating member includes a brim portion extending radially inwards from the rotatable axial surface and forms a ring-shaped sealing gap between the rotating member and the stationary axial surface.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, the stationary casing including a surrounding side wall, an upper end wall and a lower end wall; a gas inlet; a rotating member including a plurality of separation members; a gas outlet; a drainage outlet; a drive member for rotating the rotating member; at least one guiding vane arranged for guiding separated liquid impurities on the inner surface of the lower end wall from a radial outer position to the drainage outlet; and a radial disc element arranged on top of the at least one guiding vane. The radial disc element extends radially in the separation space to a position radially inwards from the surrounding side wall, thereby forming an annular channel for separated liquid impurities at the inner surface of the surrounding side wall.

Abstract: A disc stack of frustoconical separation discs is configured to be mounted in a separation chamber of a centrifugal separator. The discs are stacked upon each other in a manner forming narrow separation spaces between adjacent discs. The discs are welded to each other at radially outer portions of the discs. A rotor unit for a centrifugal separator, a centrifugal separator including a rotor unit, a method of providing a disc stack of frustoconical separation discs, and a method of providing a rotor unit for a centrifugal separator are also disclosed.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member including a plurality of separation members arranged in the separation space and being arranged to rotate around an axis of rotation. The separator includes a gas outlet arranged in the stationary casing and configured to permit discharge of cleaned gas and including an outlet opening through a wall of the stationary casing, a drainage outlet arranged in the stationary casing and configured to permit discharge of liquid contaminants separated from the gas to be cleaned. The separator includes a turbine casing in which a turbine wheel that is drivingly connected to the rotating member is arranged; and a nozzle arranged for directing a jet of pressurized liquid towards the turbine wheel, thereby rotating said turbine wheel.

Abstract: A crankcase gas separator includes a separator housing delimiting at least part of a separation space and forming at least part of a liquid phase receiving circumferential inner wall surface, a wall member forming at least part of a gas passage, and a gas pressure regulating valve including at least part of the gas passage. The separator includes a separate tube member extending from a position radially inside the inner wall surface into the gas passage. A liquid tight seal between the separate tube member and the wall member is formed by a joint arranged radially outside the inner wall surface.

Abstract: A centrifugal separator is configured to separate liquid and solid particles from a flow of gas generated by a machine. The centrifugal separator includes a centrifugal rotor, a hydraulic drive arrangement configured to rotate the centrifugal rotor, a hydraulic connection for connecting the hydraulic drive arrangement to a hydraulic circuit of the machine, and a connecting portion for connecting the centrifugal separator to the machine. The hydraulic connection is arranged on the connecting portion, and the connecting portion is configured to be inserted into a connecting aperture of the machine. A machine includes the centrifugal separator.

Abstract: A crankcase gas separator includes a separator housing delimiting at least part of a separation space and forming at least part of a liquid phase receiving circumferential inner wall surface, a wall member forming at least part of a gas passage, and a gas pressure regulating valve including at least part of the gas passage. The separator includes a separate tube member extending from a position radially inside the inner wall surface into the gas passage. A liquid tight seal between the separate tube member and the wall member is formed by a joint arranged radially outside the inner wall surface.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member including a plurality of separation members arranged in the separation space and being arranged to rotate around an axis of rotation, the rotating member being journaled within the stationary casing via at least one bearing retained in a bearing holder. The centrifugal separator includes a gas outlet arranged in the stationary casing and configured to permit discharge of cleaned gas and including an outlet opening through a wall of the stationary casing, a drainage outlet arranged in the stationary casing and configured to permit discharge of liquid contaminants separated from the gas to be cleaned and a drive member for rotating the rotating member.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, the stationary casing including a surrounding side wall, an upper end wall and a lower end wall; a gas inlet; a rotating member including a plurality of separation members; a gas outlet; a drainage outlet; a drive member for rotating the rotating member; at least one guiding vane arranged for guiding separated liquid impurities on the inner surface of the lower end wall from a radial outer position to the drainage outlet; and a radial disc element arranged on top of the at least one guiding vane. The radial disc element extends radially in the separation space to a position radially inwards from the surrounding side wall, thereby forming an annular channel for separated liquid impurities at the inner surface of the surrounding side wall.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing module including a surrounding side wall enclosing a separation space through which a gas flow is permitted, a gas outlet for cleaned gas, and at least one drainage opening for draining separated liquid contaminants from a lower portion of the stationary casing module; a rotating module including a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation; a drive member arranged for rotating the rotating module around the axis of rotation; and an inlet module arranged axially above the stationary casing module, including an inlet pipe for supply of the gas to be cleaned to the inlet module. The inlet module is in fluid contact with the separation space and a liquid outlet module arranged axially below the stationary casing module and configured to permit discharge of liquid contaminants drained from the stationary casing module.

Abstract: A centrifugal separator for separating a liquid phase from a crankcase gas includes a housing, a separation chamber inside the housing, a rotor shaft, a rotor connected to the rotor shaft, a bearing arranged at an end portion of the rotor shaft, and a liquid outlet for the separated liquid phase. The end portion of the rotor shaft extends through the bearing outside the separation chamber. A ring-shaped sealing gap is formed between the housing and a member connected to the rotor shaft outside the separation chamber. The liquid outlet is arranged, seen in relation to the axial direction, radially outside the bearing and radially inside a radially outer end of the ring-shaped sealing gap.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, a gas inlet, a rotating member, a gas outlet including an outlet opening through a wall of the stationary casing, a drainage outlet arranged in the lower portion of the stationary casing, a drive member for rotating the rotating member, and a stationary axial surface extending into the separation space. The rotating member includes a rotatable axial surface arranged radially outside the stationary axial surface. The rotatable axial surface is arranged at the gas inlet such that liquid contaminants present in the gas to be cleaned is pressed against the rotatable axial surface during operation. The rotating member includes a brim portion extending radially inwards from the rotatable axial surface and forms a ring-shaped sealing gap between the rotating member and the stationary axial surface.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, a gas inlet, a rotating member including a plurality of separation members, a gas outlet, a drainage outlet arranged in the lower portion of the stationary casing and a drive member for rotating the rotating member. The axial inner side surface of the stationary casing incudes at least one straight recess extending in the axial direction for accumulating oil that has been separated in the plurality of separation members. The at least one recess includes a first radial recess surface extending from the axial inner side surface of the stationary casing. The at least one recess extends axially on the inner side surface at least along the axial length of the radially outermost portion of the separation members.

Abstract: A disc stack of frustoconical separation discs is configured to be mounted in a separation chamber of a centrifugal separator. The discs are stacked upon each other in a manner forming narrow separation spaces between adjacent discs. The discs are welded to each other at radially outer portions of the discs. A rotor unit for a centrifugal separator, a centrifugal separator including a rotor unit, a method of providing a disc stack of frustoconical separation discs, and a method of providing a rotor unit for a centrifugal separator are also disclosed.

Abstract: A centrifugal separator is configured to separate liquid and solid particles from a flow of gas generated by a machine. The centrifugal separator includes a centrifugal rotor, a hydraulic drive arrangement configured to rotate the centrifugal rotor, a hydraulic connection for connecting the hydraulic drive arrangement to a hydraulic circuit of the machine, and a connecting portion for connecting the centrifugal separator to the machine. The hydraulic connection is arranged on the connecting portion, and the connecting portion is configured to be inserted into a connecting aperture of the machine. A machine includes the centrifugal separator.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member including a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation, a gas outlet configured to permit discharge of cleaned gas and including an outlet opening through a wall of the stationary casing, a drainage outlet configured to permit discharge of liquid impurities separated from the gas to be cleaned, and a drive member, for rotating the rotating member.

Abstract: A housing for a centrifugal separator is disclosed, wherein the centrifugal separator is configured to separate a liquid phase from crankcase gases of an internal combustion engine using a rotor. The housing includes a housing body forming a separation chamber, an opening in the housing body, a bearing retainer arranged at the opening, and a bearing inserted into the bearing retainer. The bearing is configured to receive a rotor shaft extending into the separation chamber. The bearing retainer includes a bearing seat portion provided with a number of plastically deformed zones retaining the bearing in the bearing retainer. A centrifugal separator and a method of retaining a bearing of a rotor shaft in a housing for a centrifugal separator are also disclosed.

Abstract: A centrifugal separator for cleaning gas containing contaminants includes a stationary casing enclosing a separation space through which a gas flow is permitted, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member including a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation, a gas outlet configured to permit discharge of cleaned gas and including an outlet opening through a wall of the stationary casing, a drainage outlet configured to permit discharge of liquid impurities separated from the gas to be cleaned and an electrical motor for rotating the rotating member.