A nacelle for a wind turbine extends along a longitudinal axis between a front side where a wind rotor is rotatably attachable to the nacelle for rotating about the longitudinal axis and a longitudinally opposite rear side is provided. The nacelle includes an outer surface delimiting an inner volume of the nacelle, a cooling path for circulating a cooling flow in the inner volume. The nacelle further includes a pressure source for generating an overpressure inside the inner volume of the nacelle, the pressure source including an inlet at the outer surface for receiving the cooling flow and an outlet for delivering the cooling flow in the inner volume, at least one heat exchanger provided in the outer surface for receiving the cooling flow from the inner volume.

A system for cooling a tower of a wind turbine including at least one cooling fluid inlet arranged in a tower wall for receiving a cooling fluid into the tower, a filtration assembly arranged within the tower, and at least one cooling fluid outlet for directing the filtered cooling fluid within the tower. The filtration assembly including a plurality of flow guiding structures that define a plurality of flow paths for providing a plurality of flow direction changes and/or flow velocity changes to the cooling fluid.

A system for cooling a tower of a wind turbine including at least one cooling fluid inlet arranged in a tower wall for receiving a cooling fluid into the tower, a filtration assembly arranged within the tower, and at least one cooling fluid outlet for directing the filtered cooling fluid within the tower. The filtration assembly including a plurality of flow guiding structures that define a plurality of flow paths for providing a plurality of flow direction changes and/or flow velocity changes to the cooling fluid.

An oil field pump installed within a pipe that connects to an oil field, feeds accumulated extraction oil in a predetermined direction and includes a rotor, a stator mounted on the outer circumference of the rotor, a flow path for flow of the extraction oil connecting an area formed within the rotor to an area formed between the rotor and the stator, a thrust bearing that supports the axial weight of the rotor and the stator, and a supply pipe that supplies a portion of the extraction oil in the flow path to the thrust bearing. The thrust bearing includes a protrusion part fixed to the outer circumference of the rotor and rotating as one piece with the rotor, and a facing part fixed to the stator and facing opposite a surface in the axial direction of the protrusion.

The present invention relates to a lubrication system for a wind turbine (105). The lubrication system comprises at least one or more pumps (310), a tubing system (206, 207, 209), one or more lubricant reservoirs, and a filtering system (200). The filtering system (200) comprises at least one cylindrical filter container (100). Each cylindrical filter container (100, 100a) comprises at least one filter element (301-304). Each cylindrical filter container (100, 100a) defines a central axis (101) along its axial direction and the central axis (101) of each cylindrical filter container (100, 100a) is oriented in a direction forming an angle of at least 10 with respect to a vertical direction (102).

A turbine engine incorporating a fine particle separation means. The turbine engine includes: a compressor, a diffuser, and a flow path positioned downstream from the diffuser, wherein the flow path comprises an outer annular wall and an inner annular wall between which the compressed air flows, and wherein the flow path comprises an arc that redirects the compressed air from flowing in a substantially radial flow direction to a substantially axial flow direction. The turbine engine further includes an extraction slot in the outer annular wall that fluidly connects with a scavenge plenum, the extraction slot also being positioned downstream axially along the flow path from the arc. The turbine engine further includes an aspiration slot, downstream from the extraction slot, that allows air from the plenum to recirculate back into the flow path.

An air-inlet duct includes an outer wall, an inner wall, and a splitter. The splitter cooperates with the outer wall and the inner wall to establish a particle separator which separates particles entrained in an inlet flow moving through the air-inlet duct to provide a clean flow of air to a compressor section of a gas turbine engine.

Apparatus and methodologies are provided for pumping fluids from a body of fluids. Herein, an apparatus operably connected to at least one pump for pumping fluids from a body of fluids is provided, the apparatus having a pump hose with a first intake end for receiving the pumped fluids and a second outlet end operably connected to the pump, a pump intake assembly, fluidically connected to the intake end of the pump hose, the pump intake assembly having at least one fluid control valve, a rotatable filter cage, centrally disposed about the pump intake assembly, and at least one fluid injection pipe centrally disposed within the pump hose for supporting the at least one fluid control valve, and for injecting fluids to drive the rotation of the rotatable filter cage. Herein, methods of utilizing the fluid pumping apparatus are provided.

A nacelle for a wind turbine extends along a longitudinal axis between a front side where a wind rotor is rotatably attachable to the nacelle for rotating about the longitudinal axis and a longitudinally opposite rear side is provided. The nacelle includes an outer surface delimiting an inner volume of the nacelle, a cooling path for circulating a cooling flow in the inner volume. The nacelle further includes a pressure source for generating an overpressure inside the inner volume of the nacelle, the pressure source including an inlet at the outer surface for receiving the cooling flow and an outlet for delivering the cooling flow in the inner volume, at least one heat exchanger provided in the outer surface for receiving the cooling flow from the inner volume.

A vortex pump with an impeller is provided. The impeller includes blades for delivering solids-containing media which are arranged in bundles. The spacing the blades in the bundles is smaller than the spacing of the bundles from each other.