Abstract: A telescopic wind turbine tower includes a base, a telescopic tubular tower, a wind turbine assembly, and one or more jacking systems. The telescopic tubular tower is configured with a bottom section and one or more upper sections. The bottom section is concentrically mounted onto the base. The upper section or sections are slidably engaged to the bottom section through one or more jacking systems. The wind turbine assembly is mounted onto a top section from the upper sections and as the telescopic tubular tower is positioned between the base and the wind turbine assembly.

Abstract: Provided is a method of shaping an initial edge seal along a longitudinal edge step of an add-on part mounted on the outer surface of a rotor blade, which method includes the steps of providing an initial edge seal along a longitudinal edge step of an add-on part mounted on an outer surface of a rotor blade, and removing a top layer of the initial edge seal. Further provided is wind turbine rotor blade.

Abstract: A fan structure including a center portion, multiple fan blades, and a fixing ring is provided. The center portion includes a bottom surface and a center shaft. The center shaft is perpendicular to the bottom surface, and the direction in which the center shaft extends is an axial direction. The fan blades are mutually separated and connected to the bottom surface of the center portion and are disposed around the axial direction. Each of the fan blades has a height which is parallel to the axial direction. The fixing ring simultaneously contacts the side of the fan blades which is away from the center shaft. Along the axial direction, with the bottom surface of the center portion as a reference surface, the fixing ring is disposed at a range of 40% to 80% of the height of each of the fan blades.

Abstract: A blower includes a first extension having a first discharge port formed in a first wall, a second extension having a second discharge port formed in a second wall facing and spaced apart from the first wall, a fan provided below the first and second extensions to guide air toward each of the first tower and the second tower, a first gate provided inside the first tower or protruding from the first wall, a second gate provided inside the second tower or protruding from the second wall, a first guide motor to change a position of the first gate, and a second guide motor to change a position of the second gate.

Abstract: A blower is disclosed. The blower of the present disclosure comprises: a fan generating flow of air; a lower body providing an internal space in which the fan is installed, and having a suction hole through which air passes; an upper body being an upper body, which is installed over the lower body and forms a channel that communicates with the internal space of the lower body, and having a space formed through the upper body in a front-rear direction; a slit formed to pass through the upper body and discharging air flowing through the channel of the upper body to an outside of the upper body; and a vane or a door movably installed inside the upper body, and adjusting a flow direction of the air passing through the slit.

Abstract: A gutter cleaner comprising: a fan assembly; a guide configured to at least partially support the fan assembly on a gutter, wherein the guide comprises a skid configured to slide along the gutter; a handle coupled to the fan assembly at a location adjacent to a first axial end of the handle; and a battery port disposed at a location adjacent to a second axial end of the handle, the second axial end of the handle being opposite the first axial end of the handle, wherein the gutter cleaner is supportable via the handle by an operator located at an elevation below the gutter, and wherein the gutter cleaner has an approximately neutral operational buoyancy.

Abstract: A fan wheel includes a hub having a passage extending along an axis, where the passage is configured to receive a shaft. The hub includes a first mounting surface positioned at a first location along the axis and a second mounting surface offset from the first mounting surface and positioned at a second location along the axis. The fan wheel also includes a fan blade having a first mounting tab and a second mounting tab, where first mounting tab is configured to engage with and couple to the first mounting surface and the second mounting tab is configured to engage with and couple to the second mounting surface.

Abstract: A propeller pitch adjustment assembly is provided with a base hub operatively connected by blade shafts to propeller blades in which each blade rotates about an axis of each shaft. Each blade shaft is radially disposed about a propeller drive shaft and parallel to a pressure flange of a base hub spring plate. The spring plate counterforces the blade rotation with a lever screw that impacts the plate. An opposing spring transfers a load to the plate. The equilibrium position of the plate is determined by the spring force on the lever and a counteracting force exerted on the lever by a lift force generated by fluid flow over a propeller blade. A capping mechanism can provide a preload to the spring. A force exerted by the lift of the blade on the lever screw results in a blade pitch change.

Abstract: A fan hub for an extractor for a harvesting machine that harvests a crop. The fan hub having a hub cover positioned along a rotation axis of a fan of the extractor. The hub cover is adjustable to alter the profile of the hub cover relative to the rotation axis.

Abstract: A wind turbine apparatus for use in movement of components of a wind turbine. The wind turbine apparatus has an upright support means, the upright support means being adaptable to be set on a surface below a load in use, such that the weight of the load is transferred to the surface. The wind turbine apparatus further has a load bearing means for engaging a load, the load bearing means being operably coupled with the upright support means and being configured to be moveable laterally when bearing a load. The wind turbine apparatus further has a means for raising and lowering the load bearing means. The wind turbine apparatus can be used for supporting, raising and lowering yaw brake calipers.

Abstract: A backpack blower has a backpack with a load-bearing frame, a blower tube with a backpack-side tube section which is held on a rear side of the load-bearing frame, and a hand-side tube section which extends past a first side region of the load-bearing frame, a drive motor, an energy source for the drive motor, and an axial fan which is driven by the drive motor, has an axial fan axis, and is arranged in the backpack-side tube section of the blower tube. The backpack-side tube section of the blower tube runs with a main direction component in a backpack transverse direction of the load-bearing frame and has an axial blower tube end termination which projects laterally beyond a second side region of the load-bearing frame, which second side region faces away from the first side region, and/or is surrounded at least on a part of its circumference by a protective ring element which is connected to the load-bearing frame. The blower may be an electric leaf blower.

Abstract: A housing for a fan, in an embodiment for an axial or diagonal fan, with the fan including an impeller and at least one flow-through region, wherein immediately downstream of the impeller or the blades of the impeller in an outer region of the housing and thus in the flow-through region, multiple individual, free-standing guide elements are provided. A fan includes a corresponding housing.

Abstract: An axial-flow fan includes: a hub; and blades disposed on an outer peripheral surface of the hub and spaced apart from each other in a circumferential direction. The hub includes: an outer wall having a tubular shape; an inner wall having a tubular shape and being disposed radially inward of the outer wall; a boss to which a shaft is mounted and that is disposed radially inward of the inner wall; a first sidewall connecting an end portion of the outer wall that is closer to a first side in a rotation axis direction of the hub with an end portion of the inner wall that is closer to the first side in the rotation axis direction; and a second sidewall connecting the end portion of the inner wall with an end portion of the boss that is closer to the first side in the rotation axis direction.

Abstract: A blower includes a blower body and a nozzle. The blower body includes a housing having an inlet opening, a motor housed in the housing and at least one fan housed in the housing. The nozzle is connected to the blower body and extends in an axial direction. The nozzle has a discharge opening formed in its one end in the axial direction and at least one vent hole formed in a different position from the discharge opening.

Abstract: The fan includes a fan frame, blades positioned inside the fan frame, a grill frame on a side of the fan frame, a centerline of the grill frame traversing through a midpoint of the grill frame, a first motor configured to rotate the blades to produce an air flow in a first direction through the grill frame, the first direction being parallel to a centerline of the grill frame, a second motor configured to rotate the grill frame within the fan frame, a plurality of louvers affixed within the grill frame, the plurality of louvers including a first subset of louvers and a second subset of louvers, the first subset of louvers possessing no offset angle relative an angle of the centerline, each one of the second subset of louvers being angled toward a first side of the grill frame due to the at least one first offset angle.

Abstract: A steam turbine stator vane includes a vane body portion which has a vane surface including a pressure surface and a suction surface, a moisture removal channel disposed in the vane body portion, at least one slit opening to the vane surface to communicate with the moisture removal channel and extending along a height direction from a base end portion toward a tip end portion of the vane body portion, and at least one groove portion disposed in the vane surface and extending from the base end portion along the height direction, at least a part of the at least one groove portion overlapping the at least one slit along the height direction.

Abstract: Blowers having noise reduction features are provided. A blower may include a main body defining an airflow path therethrough, the main body extending between and defining an inlet end and an outlet end. The blower may further include an inlet muffler provided at the inlet end. The inlet muffler includes a plurality of inlet ports, each of the plurality of inlet ports including a peripheral surface defining a port aperture therethrough. At least one of the plurality of inlet ports further includes a damper material provided on the peripheral surface of the at least one inlet port and further defining the port aperture therethrough.

Abstract: A fan frame turbulence structure includes a frame body having a wind incoming side and a wind outgoing side respectively on two sides of the frame body. The frame body defines an airflow passage which passes through the frame body from the wind incoming side to the wind outgoing side. The wind incoming side has an inlet in communication with the airflow passage. The inlet has a breaking section between the wind incoming side and the passage inner wall. The breaking section includes densely distributed breaking units. The breaking units define therebetween gaps in communication with the airflow passage. The breaking units serve to break and fracture airflow sucked in from the wind incoming side, whereby part of the airflow passes through the gaps between the breaking units and is broken and fractured into multiple gap turbulences to flow into the air passage so as to lower the wideband noise.

Abstract: An assembling structure of a ceiling fan has a motor shaft and a driving assembly mounted on the motor shaft. The motor shaft is mounted through the driving assembly. The driving assembly has an upper cover, a lower cover, a chamber, a circuit board, and a positioning mechanism. The lower cover has a covering board and a mounting cylinder mounted in a center of the covering board, and is mounted on the motor shaft via the mounting cylinder. The chamber is formed between the upper cover and the lower cover. The circuit board is mounted in the chamber. The upper cover, the lower cover, and the circuit board are sequentially arranged from top to bottom. The positioning mechanism is mounted in the chamber and limits a mounting position of the circuit board. The present invention solves the noise issue.

Abstract: A composite nacelle cover (1;22) equipped with main machinery components (9a;9b;10) for a wind turbine has a composite wall (3,4,5,6,7) constituting a first load-carrying structure for at least one component of a first part (9a;9b) of the main machinery components. The length of the conventional load-carrying frame can be reduced and a lot of weight of the overall nacelle structure be eliminated.