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.

An oil separator for separating oil from oil-laden gases includes a housing having a plurality of cavities with an auger disposed in each cavity. Each auger has a helical flight extending about a longitudinal central axis between inlet and outlet ends. At least one of the augers has an annular wall extending from the inlet end with an end cap, including an inlet, extending thereover to delimit an inlet chamber. A valve head is disposed in the inlet chamber, wherein a spring member biases the valve head to perfect a seal over the inlet to inhibit the flow of oil-laden gases therethrough. The valve head is moveable against the bias of the spring member to an open position in response to pressure applied against the valve head sufficient to overcome the spring member bias to promote the flow of oil-laden gases through the inlet chamber and about the auger.

A pump device may include a side channel compressor that may include a housing having a conveying chamber and a fluid inlet and outlet. The compressor may include an impeller having blades radially on an outside and which may be mounted rotatably in the housing, the blades lying in the conveying chamber, and a shaft mounted rotatably about an axis of rotation and on which the impeller may be fastened. The conveying chamber may have at least one side channel running in a region of the blades and connecting the fluid inlet and outlet to one another in a circumferential direction. An intermediate region may be formed in the circumferential direction between the fluid inlet and outlet and in which a distance of the blades in an axial direction to the nearest wall may be such that no more than a predetermined amount of fluid flows in the intermediate region.

A gas turbine engine includes a fan section including a fan rotor, a compressor section, a turbine section including a fan drive turbine that drives the fan rotor through a gear reduction, and a lubrication system that supplies oil to the gear reduction and includes a lubricant pump that supplies a mixed air and oil to an inlet of a deaerator during operation. The deaerator includes a shell defining a cavity and a separator that separates the mixed air and oil in the cavity, delivers separated air to an air outlet of the deaerator and delivers separated oil back into an oil tank during operation. A method of designing a gas turbine engine is also disclosed.

A degas bottle for inducing a cyclonic direction of flow to incoming coolant is disclosed. The degas bottle includes a body and an air separator having a cylindrical wall. An incoming coolant inlet is attached to the upper end of the air separator and is positioned at a tangent with respect to the cylindrical wall of the air separator, thus inducing cyclonic action as the coolant enters the air separator. The air separator may be of a cylindrical shape or of a conical shape. As air trapped coolant tangentially flows into the air separator, it will follow the cylindrical or conical shape of the air separator. The centrifugal force keeps the incoming coolant pressed against the inner wall of the air separator coolant on the wall while air separates from the coolant. The cyclonically flowing coolant circles downward to the reservoir while air remains on top of the coolant.

An oil separator for separating an oil in a blow-by gas, includes a housing forming a flow passage, and defining an annular shoulder face facing a downstream side; a valve member reciprocatable between a blocking position abutting an end face thereof against the annular shoulder face to block the flow passage, and an open position separating the end face from the annular shoulder face to open the flow passage; a spring device urging the valve member toward the blocking position; and a reflux device for refluxing the oil separated from the blow-by gas. The valve member includes a first side face facing a wall face of the flow passage and spaced from the wall face at a predetermined interval. A relation wherein a gap between the end face of the valve member and the annular shoulder face in the open position is narrower than the predetermined interval is always established.

A separator (1) for separating contaminants from a fluid stream having entrained particulate contaminants, comprises a cylindrical dividing wall (28) concentrically arranged within an impaction surface (35). The cylindrical dividing wall defines a first chamber (42) into which a fluid stream enters and flows axially through. The dividing wall has apertures (29) through which the fluid stream passes towards the impaction surface. As the fluid impacts the impaction surface, the contaminants are separated from the fluid and flow down to an oil outlet (23). A diaphragm (31) moves along an axis to adjust the open cross-sectional area of the apertures in the dividing wall according to a pressure differential between fluid pressure in the first chamber and a pressure reference by moving along the dividing wall to progressively occlude the apertures. The apertures are spaced so that there is no overlap between them along the actuator axis.

A liquid separation device for the separation of liquid or liquid mist from a gas, with at least one pair of basic carriers being a first and a second plate-shaped basic carrier, where in each of the first and the second basic carrier, at least two separator elements are formed. The separator elements each have a passage pipe with a gas inlet and a gas outlet, which are arranged at opposite sides of the respective plate-shaped basic carrier in such a way that the passage pipe extends through the respective plate-shaped basic carrier. The first and the second basic carrier being arranged one next to the other in flow direction of the gas. Each of the two separator elements in both basic carriers in which the separator elements are arranged adjacent to each other, with their passage pipes form continuous flow paths for the gas. At least in the transition area of a flow path from an upstream passage pipe to an adjacent downstream passage pipe, the inner diameter of the downstream passage pipe is larger than the inner diameter of the adjacent upstream passage pipe.

A gas turbine engine comprises a fan drive turbine for driving a gear reduction. The gear reduction drives a fan rotor. A lubrication system supplies oil to the gear reduction. The lubrication system includes a lubricant pump supplying a mixed air and oil to a deaerator inlet. The deaerator includes a separator that for separating oil, and delivering separated air to an air outlet, and for delivering separated oil back into an oil tank. The separator includes a member having lubricant flow paths on both of two opposed sides. A method of designing a gas turbine engine is also disclosed.

A gas turbine engine comprises a fan drive turbine for driving a gear reduction. The gear reduction drives a fan rotor. A lubrication system supplies oil to the gear reduction. The lubrication system includes a lubricant pump supplying a mixed air and oil to a deaerator inlet. The deaerator includes a separator that for separating oil, and delivering separated air to an air outlet, and for delivering separated oil back into an oil tank. The separator includes a member having lubricant flow paths on both of two opposed sides. A method of designing a gas turbine engine is also disclosed.