Abstract: A system for installing on a wind turbine tower at least one moving objects monitoring device and/or at least one moving objects collision prevention device, comprising: a mounting base (1) adapted to be mounted on the tower and comprising a flat surface (A) and at least one pair of opposite walls (2, 2?), a box (10) for installing the aforementioned devices comprising a flat base (11) and four sides (12, 12?, 12?, 12?), wherein the box (10) is adapted to be connected to the mounting base (1) to form a closed space inside the box (10) and comprises at least one opening (13, 13?, 13?), and at least one supporting base (14, 14?, 14?) for supporting the aforementioned devices on the flat base (11) so that only the part which is necessary to be located outside the box (10) for performing the monitoring and/or collision prevention functions protrudes from the opening (13, 13?, 13?).

Abstract: An information processing system includes a printed circuit board assembly and a chassis to receive and support the printed circuit board assembly. The printed circuit board assembly includes a plurality of fan connectors. A bracket is configured to be coupled with the chassis. The system further includes a fan module, which comprises a fan rotor contained within a fan housing, an electrical connector, and a bracket connector to removably couple the fan module to the bracket. The fan module further includes an electrical connector couplable to a fan connector of the printed circuit board assembly.

Abstract: A fan assembly, including a fan body including first and second retention assemblies and an inlet surface defining an air inlet. A motor-driven impeller contained within the fan body generates an airflow. A filter assembly attached to the fan body includes one or more flexible filter media, a first engagement element positioned at first edge of the filter media, and a second engagement element positioned at a second, opposite edge of the filter media. The filter assembly is furlable, and the first and second engagement elements releasably engage with the respective first and second retention assemblies of the fan body to retain the filter assembly tautly over the inlet surface in an at least partially unfurled state, such that, in use, airflow drawn through the air inlet by the motor-driven impeller is drawn through the filter media. The fan body is cylindrical in shape and the filter assembly wraps around substantially all the fan body.

Abstract: Systems and methods associated with sound dampening in blowers are provided. A blower including an air inlet; an air outlet; a conduit extending between the air inlet and the air outlet, the conduit defining a fan location and a fan stator disposed in series with the fan location, the fan stator defining at least one stator blade; and an axial fan disposed at the fan location, the axial fan defining at least one blade, wherein the conduit is coated with a first flocking at the fan location, wherein the at least one stator blade is coated with a second flocking, or both.

Abstract: Disclosed is a method, performed by an electronic device, for control of operation of a wind turbine. The method comprises obtaining wind turbine data indicative of one or more alerting events of the wind turbine, wherein the wind turbine data comprises warning data indicative of a warning of the wind turbine, and/or alarm data indicative of an alarm state of the wind turbine. The method comprises obtaining sensor data from a plurality of sensors of the wind turbine indicative of operating conditions associated with the wind turbine. The method comprises predicting, based on the wind turbine data and the sensor data, an upcoming safety stop by applying a machine learning model to the wind turbine data and the sensor data. The method may comprise providing, based on the predicted upcoming safety stop, control data indicative of a controlled stop or a derating to be performed by the wind turbine.

Abstract: A ceiling fan is provided. The ceiling fan includes a mounting fixture configured to removably connect the ceiling fan to an installation location; a connecting rod, one end of which is connected to the mounting fixture; a motor assembly including a housing, a rotor and a stator located in the housing, and a motor shaft fixed to the stator, wherein a first end of the motor shaft is connected to the other end of the connecting rod, a second end of the motor shaft extends out of the housing, the motor shaft includes a hollow channel, and the rotor is sleeved on outside of the stator; a protective grill including an upper grill and a lower grill that are removably connected to each other, wherein the upper grill is connected to the housing; a fan blade assembly, accommodated in the accommodation space and connected to the rotor.

Abstract: A control device is provided with a control section that operates an apparatus on board a vehicle and controls a first frequency, which relates to an operation sound of the apparatus, such that the first frequency corresponds with a second frequency, which relates to an ambient sound in the vehicle.

Abstract: A blower apparatus includes a fan and motor generating an airflow from an inlet end to an outlet end of the debris blower. The airflow defines an airflow axis and a cross-sectional plane normal to the airflow axis. An enclosure provides an airflow path towards the outlet end. A resonant chamber is proximate an airflow entrance end of the enclosure. The resonant chamber has first and second sections encompassing corresponding first and second volumes of different sizes. The different sizes are selected to form an acoustic resonator. The acoustic resonator attenuates noise from the blower over a selected attenuation frequency range.

Abstract: The present invention provides support frames for positive pressure blowers having one or more wheels mounted at a lower corner of the frame, wherein the wheels are mounted to roll in a direction that is perpendicular to the flow of air through the blower. This sideways orientation of the wheels allows a frame carrying a blower to be easily moved from side to side, such as when placed into or removed from a side compartment on an emergency vehicle, and allows such a frame carrying a blower to be easily tilted, turned and rolled around at the scene of a fire in much the same manner as a wheelbarrow. Embodiments of the invention may include an upper handle or grip which allows a user to control the frames by tilting and rolling them around on the wheels. Embodiments of the invention may include a support bracket for holding a battery or other power supply.

Abstract: The disclosure features subaquatic power generation systems and methods of their use in bodies of water. Some implementations feature a subaquatic power generation system that includes (a) a housing having an inlet, an outlet, and, between the inlet and outlet, a channel through which water can pass in a fluid flow direction, and a power generating area defining a watertight and airtight chamber configured to provide an air pocket within the housing when the housing is fully submersed in water; and (b) a waterwheel disposed within the power generating area such that a longitudinal axis of the waterwheel is oriented generally horizontally and generally perpendicular to the fluid flow direction, an upper portion of the waterwheel is disposed within the chamber, and a lower portion of the waterwheel is disposed within the channel and acted upon by fluid flow through the channel.

Abstract: Provided is a wind turbine component for a wind turbine, in particular for a wind turbine tower and/or a rotor blade, to a wind turbine tower, to a rotor blade, to a wind turbine and to a method for producing a wind turbine component. Provided is a wind turbine component for a wind turbine, in particular for a wind turbine tower and/or a rotor blade, comprising a first wall element with a first inner surface and a first outer surface arranged opposite the latter, a corrugated structural element, wherein the structural element is arranged on the first inner surface or on the first outer surface, wherein the first wall element is connected to the structural element.

Abstract: The disclosure concerns a compressor blade for gas turbine engine. Specifically the blades of the compressor are modified according to predetermined requirements for both aerodynamic stability and fuel economy in multiple planes.

Abstract: A guiding mechanism, includes a guiding surface enclosed by a first curve segment, a second curve segment, a third curve segment and a first straight line segment; a starting point of the first curve segment is defined as an origin of coordinates, two perpendicular straight lines passing through the origin of coordinates on a plane where the first curve segment is located are respectively defined as X-axis and Y-axis, and a line perpendicular to both the X-axis and the Y-axis is defined as Z-axis; coordinates of an ending point of the first curve segment is (x3,y3), x3?0 and y3?0. The present invention also discloses a centrifugal fan and a range hood.

Abstract: In a first example there is provided a method of servicing a wind turbine rotor blade. The blade comprises an outer shell defining an interior cavity, and the rotor blade is part of a rotor connected to a wind turbine. The method comprises arranging the rotor such that the 5 blade is in a first orientation, installing a work platform in the interior cavity of the blade when the blade is in the first orientation, and subsequently arranging the blade in a second orientation. The method further comprises using the work platform, when the blade is in the second orientation, to support a technician performing a service operation on the blade.

Abstract: A neck hanging fan is provided, which includes a bracket that can be worn on a human's neck. The bracket includes extension arms located on two sides of the human's neck, extension ends of the extension arms are provided with a wind duct. The wind duct is provided with an air channel and a fan component. One end of the wind duct away from the extension arms is provided with an air inlet, an air outlet is provided at a connection between the wind duct and the extension arms. The fan component is located between the air inlet and the air outlet, and the air inlet is provided with an air inlet mesh cover. The air inlet mesh cover is provided with a plurality of first air guide holes, the air outlet is provided with an air outlet mesh cover.

Abstract: The coupling can have a female member having a plurality of female member connections circumferentially arranged along a radially inner face; a male member having a plurality of male member connections circumferentially arranged along a radially outer face; and a coupling member extending annularly around the axis, the coupling member having a strip, the strip having, circumferentially relative the axis, an alternating sequence of outer folds and inner folds, the outer folds connected to the female member via respective ones of the female member connections, the inner folds connected to the male member via respective ones of the male member connections, the inner folds being circumferentially offset from the outer folds in a given angular direction.

Abstract: A wind turbine, a method and a control system for aligning a nacelle of a wind turbine with a target yaw angle is provided, wherein the control system includes a detection device configured for detecting at least one parameter indicative of wind forces acting on at least one component of the wind turbine for determining a current yaw angle of the nacelle, and an actuation device configured for manipulating a position of the nacelle until the current yaw angle is aligned with the target yaw angle, wherein the detection device includes at least one first bending moment sensor on a first component, wherein the detection device is configured for determining a bending moment of the first component based on data received from the first bending moment sensor as the at least one parameter indicative of wind forces acting on the at least one component of the wind turbine.

Abstract: A blade access system (24) includes a support frame (28) configured to be coupled to a nacelle (14) of a wind turbine (10), the support frame (28) having at least one connecting member (42) configured to be selectively attached to and detached from at least one connecting member (40) included with the nacelle (14). A nacelle (14) includes at least one connecting member (40) configured to be coupled to at least one connecting member (42) of a support frame (28) of a blade access system (24). The at least one support frame connecting member (42) is configured to cooperate with the at least one nacelle connecting member (40) to define an unlocked position which is configured to allow the support frame (28) to attach to and detach from the nacelle (14), and a locked position which is configured to prevent the support frame (28) from detaching from the nacelle (28). A method of connecting the blade access system (24) to the nacelle (14) is also disclosed.

Abstract: A piston seal ring including a body shaped as an annular ring having an inner diameter and an outer diameter; an end gap formed in the body; a first interface surface formed on the body between the inner diameter and the outer diameter; a second interface surface orthogonally adjacent the first interface surface; and a receiver extending from the first interface surface substantially opposite the end gap, the receiver including a cavity configured to support a lug.

Abstract: An axial fan includes: an impeller including a rotating part, and a blade part connected to the rotating part; a bellmouth including a flat part orthogonal to an extension direction of a rotation axis of the rotating part; a rising part rising from the flat part; and an opening along which the rising part extends, the impeller being located in the opening, the rising part surrounding the impeller, the bellmouth including a plurality of grooves located at a surface of the bellmouth, the surface of the bellmouth being connected to an inner surface of the rising part, the inner surface of the rising part facing the blade part of the impeller, the plurality of grooves being located in at least a corner portion connecting the flat part and the rising part, the plurality of grooves extending in a direction crossing the flat part.