A separator includes a rotor, a plurality of flow channels each of which has an inlet and an outlet for gas and are in a vicinity of a rotation axis of the rotor, an air current producer configured to cause gas to flow through the plurality of flow channels, a driving device configured to rotate the rotor to rotate the plurality of flow channels around the rotation axis, and a discharger for allowing discharge of solid materials suspended in airstream produced in each of the plurality of flow channels, in a direction away from the rotation axis.

A rotor of a centrifugal separator, including a central shaft, a plurality of identical discs arranged in a stack on the central shaft, the central shaft having on an outer circumference an engagement contour for a rotationally fixed, axially slidable engagement with a corresponding contour on an inner circumference of the discs, the engagement and corresponding contours engageable with one another in multiple rotational positions at a circumferential distance from one another, and each disc having spacing elements situated at a disc circumferential distance from one another, which spacing elements hold each two adjacent discs at an axial distance from one another, forming an intermediate flow gap having a gap dimension. The spacing elements are formed and configured such that, via different rotational positions relative to one another of adjacent discs, at least two different axial dimensions of the flow gap between adjacent discs may be set.

Aspects of the disclosure are directed to a system associated with an engine of an aircraft, comprising: a deoiler configured to receive a mixture of air and oil at an input of the deoiler and separate the air from the oil, and a baffle coupled to the input of the deoiler and configured to prevent debris that is larger than a threshold from entering the deoiler.

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. The centrifugal separator further includes a control unit configured to control the drive member to rotate the rotating member at a first speed during a separation phase and at a second speed, which is higher than the first speed, during a cleaning phase to remove clogging on or between said separation members, wherein the cleaning phase is shorter in time than the separation phase.

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.

When this centrifuge is operated, local stress applied to a liquid-feeding groove formed in the upper surface of a rotor core is averaged to minimize deformation of the rotor core. A rotor core, which is mounted inside a rotor used for continuous centrifugation, has a columnar solid section, blades expanding radially outward from the solid section, and a disc section extending radially outward from the upper surface of the solid section, the upper surface of the rotor core being provided with a liquid-feeding grove that continues radially outward from the center vicinity to the outer side. A stress-mitigating groove that extends radially outward is formed in the lower surface of the liquid-feeding grove. The stress-mitigating groove is formed in a position overlapping the position of the liquid-feeding grove when the disc section is viewed along the axial direction.

Method and apparatus for cleaning an air flow from particles, such as bacteria and other microorganisms. According to the invention, an aerosol of liquid droplets is generated in the air flow, whereafter the liquid droplets and the air flow are mixed and the droplets and particles are centrifugally separated from the air flow.

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. The centrifugal separator further includes a control unit configured to control the operation of the electrical motor and to drive the electrical motor in at least two different operational modes and to further switch between operational modes depending at least on information of at least one measured internal parameter of the electrical motor.

Various rotating coalescer elements are described. The rotating coalescer elements include various arrangements of stacked separator discs or cones. In some arrangements, the described rotating coalescer elements include a combination of stacked separator discs or cones and filter media. In some arrangements, the stacked separator discs are designed to provide the largest possible amount of radial-projected separation surface area in a given rotating cylindrical volume, where flow to be cleaned is passing radially (outwardly or inwardly) through the rotating coalescer element. In some arrangements, this is achieved by stacking non-conical separating plates containing various area-maximizing features (e.g., spiral ribs, axial cylinders, spiral grooves, or spiral “V” shapes).

An apparatus for conditioning drilling fluid on a drilling rig or other location having a housing defining at least one inner chamber having a fluid inlet and a fluid outlet. At least one rotating ring, which is operationally attached to a drive shaft, and at least one stationary ring, are positioned in the inner chamber. The rotating ring further has movable geometric protrusions extending therefrom, while the stationary ring has stationary geometric protrusions extending therefrom. Selective rotation of the drive shaft causes the rotating ring and attached geometric protrusions to rotate. Drilling mud is pumped through the housing and is mixed at a very high rate without shearing or degrading entrained solids in the mud.