Abstract: A wind turbine blade includes an air brake flap flush mounted within a recess in the suction side of the blade. The air brake flap is actuatable from a retracted position within the recess to an open position wherein the air brake flap extends transversely or vertically from the suction side. A fail-safe actuator is operatively coupled to the air brake flap and is configured to hold the air brake flap at the retracted position in a powered state of the actuator and to release the air brake flap to the open position upon loss of power to the actuator.

Abstract: A blade extension for a rotor blade and a rotor blade assembly for a wind turbine are disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge each extending in a generally span-wise direction between a tip and a root. The rotor blade assembly further includes a blade extension including a first panel and an opposed second panel. Each of the first panel and the second panel includes an interior surface and an exterior surface each extending between a proximal end and a distal end. The distal end of each of the first panel and the second panel is spaced apart from the rotor blade in a generally chord-wise direction in a standard operation position.

Abstract: A pilot circuitry is disclosed for controlling the activation of an emergency feathering system of a wind turbine by means of a pilot pressure, wherein the pilot circuitry comprises at least two parallel control circuits for providing a pilot pressure. Additionally, a selector may provided for selectively preventing a control circuit from providing the pilot pressure to the emergency feathering system in case of malfunction of the control circuit.

Abstract: A wind turbine rotor blade assembly includes a rotor blade having a pressure side, a suction side, a leading edge, and a trailing edge extending in a generally span-wise direction between a tip and a root. An edge extension is attached along the trailing edge and includes a first strip member having a span-wise attachment section attached to pressure side, and a second strip member having a span-wise attachment section attached to the suction side. Each of the first and second strip members has an outboard edge and an extension section that projects chord-wise beyond the trailing edge. The extension sections are adhesively attached to each other outboard of the trailing edge along a span-wise length of the first and second strip members and define an adhesively bonded closure edge of the edge extension. A method is also provided for forming an edge extension on a wind turbine rotor blade.

Abstract: A wind turbine generator includes: a rotor hub configured to be provided inside a rotor head and contain apparatuses; a hatch configured to be provided in a front of the rotor hub; and a heat exchanger configured to be provided in an opening of the hatch. The heat exchanger includes: a partition portion configured to be put on the opening, and heat exchanging members configured to be provided so as to penetrate the partition portion, a side of one end being located inside the rotor hub and a side of the other end being located outside the rotor hub.

Abstract: A fluid turbine comprising a rotor, having an axis of rotation, comprising at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle. The fluid turbine comprises a mechanism comprising an actuation rod secured to an internal portion of each rotor blade, operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade between various pitch angles as the blade moves circumferentially about the axis of rotation of the rotor.

Abstract: A fluid turbine comprising a rotor, having an axis of rotation, comprising at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle. The fluid turbine comprises a mechanism operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade between various pitch angles as the blade moves radially about the axis of rotation of the rotor.

Abstract: A fluid turbine comprising a blade pitch control mechanism comprising a cam and at least one rocker assembly, each rocker assembly comprising a rocker arm operable to pivot about an axis of rotation, the blade pitch control mechanism being operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.

Abstract: A hub for a propeller having variable pitch blades for a turbine engine, for example for a propfan turbine engine. The propeller hub includes: a polygonal ring having substantially radial cylindrical housings distributed about a central axis of the ring for receiving the blades; a rotor element for the turbine of the turbine engine; a supporting flange attached to the ring so as to connect the ring to the rotor element; and a plurality of backup retaining members linked to the rotor element, and each of which includes at least one bearing surface opposite an outer surface of the ring with a radial spacing.

Abstract: A wind turbine having a plurality of airfoils disposed on the end of spokes which extend from a hub connected to a drive shaft. The airfoils are preferably disposed on an angle of about 40 to about 50 degrees with respect to the plane of rotation of the hub.

Abstract: A wind generator that includes a lightweight, collapsible blade assembly mounted on a supporting structure that holds the blade assembly in fixed position that is exposed to low to moderate winds. The blade assembly is coupled to the distal end of a drive shaft linked to a low RPM, axial magnetic generator designed to produce A.C. electric current when rotated at low speeds. The blade assembly is a cylindrical structure with a longitudinally axis. Coaxially aligned around the longitudinal axis is an outer blade component and an inner blade component. The outer blade component is a non-rotating structure which includes a plurality of directional blades designed to direct the wind into and towards the blades on the inner blade assembly. The inner blade component is designed to rotate inside the outer blade component and coupled to the generator's drive shaft.

Abstract: A balancing method and system for a partial pitch rotor blade for a wind turbine is described. Balancing elements are mounted to the pitch system of the rotor blade, which remove the need for complicated balancing operations to be performed which may affect the structural stability of the rotor blade body. A method is described wherein a suitable compensating balancing weight for mounting to the pitch system may be used, the weight chosen based on the known tip and root weights of standard blade extender and rotor blade parts used.

Abstract: Lightning rod system for wind turbine blades formed by various connections set up on carbon fiber laminates (2) on the blade (1), equipotentializing the surface of the flanges (4) of the beam (10) through the deviations of a primary cable (6) with the respective auxiliary cables (5), carried out with the use of a device (12) whose terminals are connected between the ends of the cited auxiliary cable (5). The use, given the elevated inductance of device (12) mounted on the connection between the carbon laminates (2) and the conductor cable or primary cable (6), is to reduce the passage of current across the carbon laminate and favor the conduction through the metal cable.

Abstract: A pitch driving unit according to the present invention is equipped with hydraulic actuators that change the pitch angles of wind turbine blades; a hydraulic pump that supplies oil to the hydraulic actuators; a high-pressure oil line that guides the oil discharged from the hydraulic pump to the hydraulic actuators; a low-pressure oil line that returns the oil discharged from the hydraulic actuators to the hydraulic pump; and a pressure control unit that stores a surplus amount of the oil and that refills the low-pressure oil line with the oil so as not to generate negative pressure at an oil intake portion of the hydraulic pump, wherein the hydraulic actuators 15, the hydraulic pump, the high-pressure oil line, the low-pressure oil line, and the pressure control unit constitute a closed hydraulic circuit that does not open to the atmosphere, the closed hydraulic circuit being filled with the oil.

Abstract: A wind turbine is disclosed having a rotor with at least two blades and a blade pitch system for controlling the pitch angle of the blades. The blade pitch system comprises for each of the blades, a hydraulic blade pitch drive and at least two valves mutually connected in parallel for controlling a flow of liquid to the hydraulic blade pitch drive for that blade. The valves each comprises an arrangement for providing a variable flow of liquid.

Abstract: A fluid turbine comprising a rotor, having an axis of rotation, comprising at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle. The fluid turbine comprises a phase-adjustable mechanism operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade between various pitch angles as the blade moves radially about the axis of rotation of the rotor.

Abstract: A safety system for wind turbines and a wind turbine fitted with this safety system. The safety system comprises a propeller shaft adapted to be solidly connected to a wind turbine rotor, an adjustment shaft movable with respect to this propeller shaft for adjusting the pitch angle of at least a rotor blade, actuating means connected to the adjustment shaft for moving it and triggering means of said actuating means being normally disconnected to said actuating means until to overcoming a certain speed of the propeller shaft. The peculiarity of the wind turbine safety system is that triggering means comprise mechanical means connected to the actuating means through direct drive transmission as to overcoming said certain speed for moving said actuating means until rotor blades being safety set. This solution ensures the safety system maximum effectiveness and certainty of operation.

Abstract: A lubrication system and wind turbine are provided having one or more input ports in a component and one or more output ports in the component. An expandable lubrication receptacle is connected to the one or more output ports, and the expandable lubrication receptacle is configured for receiving a lubrication medium from the component.

Abstract: A rotordynamic pump for delivering continuous flow of fluids, such as blood, is provided. In one embodiment, the pump includes a stator housing having an inlet and an outlet. A rotor hub is disposed within the stator housing having a mixed-stage or mixed-flow impeller. The mixed flow impeller includes both principle blades and splitter blades, the splitter blades exhibiting a shorter axial length than the principle blades. One or more stator vanes and extend radially inwardly from the stator housing. The splitter blades and principle blades are arranged in a circumferentially alternating pattern. The stator vanes include principle stator vanes and splitter stator vanes, the splitter stator vanes exhibiting a shorter axial length than the principle stator vanes. The splitter vanes and principle vanes are arranged in a circumferentially alternating pattern. The rotor hub may be magnetically suspended and rotated within the stator housing.

Abstract: A root attachment for a wind turbine rotor blade having a blade root is disclosed. The root attachment may include a wall panel configured to be coupled to the rotor blade at or adjacent to the blade root. The wall panel may define at least a portion of an airfoil shape and may include an inner side and an outer side. In addition, the wall panel may define a non-uniform cross-section between the inner and outer sides.

Abstract: A gas turbine engine includes a disk having an annular hub circumscribed about a centerline with an annular web extending radially outward from the hub to an annular rim. A multiple of slots extend generally axially through the rim and at least one of the multiple of slots having an asymmetric slot root for lower stress and higher service life.

Abstract: A connection means (1) for mounting a rotor blade (2) to a rotor hub, particularly for mounting a rotor blade (2) to a rotor hub of a helicopter, with at least two bolts (4, 5) inserted vertically relative to a main plane of said rotor blade (2) into an end (7) of said rotor blade (2) that is generally directed towards the rotor hub. At least two bolts (4, 5) are arranged distant from each other along a longitudinal axis (6) of said rotor blade (2) to said rotor hub.

Abstract: A blade extension for a rotor blade and a rotor blade assembly for a wind turbine are disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge each extending in a generally span-wise direction between a tip and a root. At least one of the leading edge or the trailing edge has a modified aerodynamic contour. The rotor blade assembly further includes a blade extension including a first panel and an opposed second panel. Each of the first panel and the second panel includes an interior surface and an exterior surface each extending between a proximal end and a distal end. The distal end of each of the first panel and the second panel is spaced apart from the rotor blade in a generally chord-wise direction in a standard operation position.

Abstract: A noise reducer for a rotor blade of a wind turbine and a rotor blade assembly are disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root. The rotor blade further defines a span and a chord. The rotor blade assembly further includes a noise reducer configured on the rotor blade. The noise reducer includes a plurality of rods each having a body extending between a first end and a second end. The body of each of the plurality of rods contacts and extends parallel to the body of a neighboring rod of the plurality of rods when the noise reducer is in a stable position.

Abstract: Methods for deploying a section of a wind turbine rotor blade include compressing a section of skin from an airfoil profile to a retracted profile, wherein the section of skin includes a shape memory polymer composite, and heating the section of skin to at least a transition temperature of the shape memory polymer composite so that the section of skin transitions from the retracted profile back to the airfoil profile.

Abstract: A composite airfoil includes a core that has a three-dimensional network of fibers. The core defines an airfoil section and a root section. A composite skin covers a portion of the core excluding the root section.

Abstract: In one aspect, a rotor hub assembly for a wind turbine is disclosed. The rotor hub assembly may generally comprise an inner hub including a plurality of hub segments assembled together and a hub enclosure including a plurality of enclosure segments assembled together. The hub enclosure may be configured to at least partially enclose the inner hub. In addition, the rotor hub assembly may include a plurality of support members extending between the inner hub and the hub enclosure.

Abstract: A tower for a wind turbine is disclosed. The tower includes an outer shell defining a yaw axis and a main frame for a nacelle. The tower further includes a first yaw bearing and a second yaw bearing each connecting the outer shell and the main frame. The first yaw bearing and the second yaw bearing are spaced apart from each other along the yaw axis and each rotatable about the yaw axis.

Abstract: A wind wheel having a vertical axis of rotation (7) is described, comprising a rotor (1) with a vertical shaft (2) and at least one support arm (4) which extends diametrically to the shaft (2) and is provided with blades (5) on both sides of the shaft (2) and is rotatably supported about the longitudinal axis thereof relative to the shaft (2), with the blades (5) on both sides of the shaft (2) being arranged at an angular offset from each other about the longitudinal axis of the support arm (4) and having a centroid of their areas of wind attack which lies at a radial distance from the longitudinal axis of the support arm (4). In order to achieve advantageous blade adjustments it is proposed that the blades (5) are mounted on the support arm (4) thereof so as to be rotatable about an axis (9) perpendicular to the radial distance of the centroid and to the longitudinal axis of the support arm (4).

Abstract: A nose cone assembly is provided comprising a nose cone 104, a support ring 106 on which the nose cone 104 is mounted, and an insulating layer 110 disposed between the nose cone 104 and the support ring 106, the insulating layer 110 at least partially comprising glass fibres. A composite nose cone is also provided comprising an attachment region A, in which composite fibres are oriented substantially perpendicular to an axis of rotation of the nose cone 104, and an impact region I, in which composite fibres are oriented substantially parallel to the axis of rotation of the nose cone 104. Also provided is a support ring 106 for a nose cone assembly, the support ring 106 comprising an annular main body 140 and an annular projecting attachment flange 142, the attachment flange 142 terminating in a plurality of circumferentially spaced attachment tabs 144, wherein the attachment flange 142 forms with the main body 140 a cross section having at least two C curves 160, 162.

Abstract: A nose cone assembly 102 is disclosed, comprising a one piece nose cone 104 and a support ring 106 on which the nose cone 104 is mounted. The support ring 106 comprises a plurality of circumferentially distributed resilient attachment tabs 114, via which the nose cone 104 is mounted on the support ring 106. The support ring 106 further comprises a load spreader 122, and each of the resilient attachment tabs 114 is operably connected to the load spreader 122, such that deflections and forces experienced by any one attachment tab 114 are distributed to other attachment tabs 114 via the load spreader 122.

Abstract: A blade (30?) for a gas turbine has an airfoil (31) and a blade root (32) for mounting the blade (30) on a rotor shaft of the gas turbine. The airfoil (31) is provided with cooling channels (33, 35) in the interior thereof, which cooling channels (33, 35) preferably extend along the longitudinal direction and can be supplied with cooling air (45) through cooling air supply passages (40-43() within the blade root (32). The blade root (32) includes a blade channel (40) running transversely through the blade root (32) and is connected to the cooling channels (33, 35), and an insert (41) is inserted into the blade channel (40) for determining the final configuration and characteristics of the connections between the blade channel (40) and the cooling channels (33, 35).

Abstract: Provided is a wind turbine generator that prevents an increase of weight of a wind turbine blade and a reduction in ventilation efficiency and that realizes good ventilation cooling of a rotor head with a simple structure. The wind turbine generator includes: a hollow interior space formed in a wind turbine blade; an exhaust path provided through a wind-turbine-blade forming member at a tip end of the wind turbine blade or in a vicinity of the tip end, so as to allow the interior space to communicate with an outside of the wind turbine blade; and an opening that allows the interior space to communicate with a rotor head main body. Ventilation cooling inside the rotor head main body is performed by using a pressure difference between the tip end of the wind turbine blade and the rotor head main body, produced by a rotation of the wind turbine blade.

Abstract: Apparatus and method for supplying lubricant to a plurality of lubrication sites. Embodiments include a pump with venting and non-venting piston return, a pump with stirrer and direct feed mechanism, a pump with CAN system and self-diagnostics, a pump with heated housing and reservoir and a pump with stepper motor and overdrive control.

Abstract: A hydraulic fan circuit is disclosed. The hydraulic fan circuit may have a primary pump, a high-pressure passage fluidly connected to the primary pump, and a low-pressure passage fluidly connected to the primary pump. The hydraulic fan circuit may also have at least one accumulator in selective fluid communication with at least one of the high- and low-pressure passages, a motor, and a fan connected to the motor. The hydraulic fan circuit may further have a fan isolation valve fluidly connected to the high- and low-pressure passages. The fan isolation valve may be movable between a flow-passing position at which the motor is fluidly connected to the primary pump via the high- and low-pressure passages, and a flow-blocking position at which the motor is substantially isolated from the primary pump.

Abstract: A character parameters obtaining method for a displacement control mechanism of a hydraulic pump and a detecting device for carrying out the method are disclosed. The method involves constructing a hydraulic system; outputting hydraulic energy by the hydraulic pump driven by a primary motor; detecting pressure of a displacement control mechanism; obtaining middle parameters by obtaining the time required for preset change of the pressure at the output end of the displacement control mechanism; obtaining character parameters of the displacement control mechanism according to the middle parameters. The method can obtain the character parameters of the displacement control mechanism by the pressure detection, so that the performance of the displacement control mechanism can be judged according to the obtained character parameters.

Abstract: A condition monitoring system for use with a reciprocating device. The condition monitoring system includes at least one pressure sensor that is configured to sense a pressure within the reciprocating device. At least one vibration sensor is configured to sense a vibration of the reciprocating device. A protection system is communicatively coupled to the pressure sensor and the vibration sensor. The protection system is configured to calculate a stiffness value of the reciprocating device based on the sensed pressure within the reciprocating device and the sensed vibration of the reciprocating device.

Abstract: A compressor comprising a liquid acting as piston that is displaceable in the piston compartment is described. According to the invention, a piston dummy (5) that can be displaced with the liquid (3) is arranged in the liquid. This piston dummy (5) is preferentially designed in such a manner that upon reaching the top dead centre it brings about an acceleration of the liquid (3) in the ring gap defined by said piston dummy and the piston chamber wall.

Abstract: A Venturi tube assembly includes: a Venturi tube having a body section with an inlet end, an outlet end and an internal flow passage between the inlet end and the outlet end, a pneumatic sucking passage outward extending from a low static pressure section of the internal flow passage to an outer circumference of the body section; and a blocking member having an exhaustion space for communicating the outlet end with the atmosphere, a blocking body movable between an unblocking position and a blocking position and a micro-section movable between a full open position and a micro-position. When positioned in the full open position, the exhaustion space fully communicates the outlet end with the atmosphere, whereby full amount of airflow is exhausted from the outlet end to the atmosphere. When positioned in the micro-position, only a micro-amount of airflow is exhausted from the outlet end to the atmosphere.

Abstract: Jet-pumping techniques for wells comprises mounting a logging tool, sealing member and jet pump on a flexible smooth tube. The pump contains nozzle and mixing chamber with diffuser with outlet connected to a tube cavity, nozzle inlet connected to space outside the tube. The tube is movable within a packer tubing string. Packer through channel diameter D1 is at least 12 mm smaller than the inside tubes diameter D2. A tube closing ball crane is provided between the pump and the member. The cylindrical body member is filled with elastic liners with bearing washers and top bearing pusher member. An insert with flange and mobile ring attaches below the body, a sleeve is provided between mobile ring and body . The flange diameter<diameter D1 of the packer through channel. The ring diameter D3>diameter D1. The ring lower surface is coated with elastic material.

Abstract: A differential pressure control valve has a valve seat made of magnetic material, a valve body having a lid made of magnetic material, and a guiding member. Fluid passes through a valve hole formed in the seat. The body on the downstream side of the seat separates from or is seated on the seat in accordance with the pressure difference between the upstream and downstream sides to selectively open and close the hole. The guiding member fixed to the seat guides the body. The lid is seated on the seat to close the hole. A guided member is made of nonmagnetic material. One of the seat and the lid has a permanent magnet. The body is urged in the direction approaching the seat by the force of the magnet located at a position outside the area where the body is seated on the seat.

Abstract: A hydraulic power module is provided with a plurality of hydraulic actuators. A piston of each of the hydraulic actuators is coupled with a drive plate and a screw is rotatably coupled with the drive plate. Rotation of the screw longitudinally displaces the drive plate to simultaneously actuate each of the hydraulic actuators. A second hydraulic power module may be coupled with the hydraulic power module, such that rotation of the screw also drives the screw of the second hydraulic power module.

Abstract: A series-connected motor unit includes a first motor, a second motor and a separation member. The first motor has a first circuit board and the second motor has a second circuit board. The separation member has a first face and a second face opposite to the first face, wherein the first face abuts against the first circuit board and the second face abuts against the second circuit board.

Abstract: A synchronous air blower, a HVAC system and a HVAC rooftop unit is disclosed. In one embodiment, the synchronous air blower includes: (1) a permanent magnet motor having a motor shaft with a first cogged sprocket attached thereto, (3) a fan having a fan shaft with a second cogged sprocket attached thereto and (4) a synchronous belt coupled to the motor shaft and the fan shaft via the first and second cogged sprockets, the synchronous belt having teeth configured to mate with the first cogged sprocket and the second cogged sprocket.

Abstract: A piezoelectric fan includes a blade that is joined to a piezoelectric oscillator that bends in response to an application of a voltage, and the blade of the piezoelectric fan is arranged to swing in a space between neighboring heat dissipating fins of a heat sink. The formation of a hole in the blade increases the amplitude of the blade and also improves the sweep effect of sweeping high-temperature air in the vicinity of the wall of the heat dissipating fin, and thus, improves the cooling capability of the piezoelectric fan.

Abstract: A scroll compressor and assembly includes a suction duct to direct refrigerant from the housing inlet to a location upstream of a motor. Additionally, the suction duct includes drain ports that act to drain oil received in the suction duct into the oil sump. This can be used for filling and charging the oil sump with oil initially by using the common refrigerant inlet port through the housing and also acts to collect coalesced oil from oil mist generated by operation of the scroll compressor in a refrigeration system and likewise drain the lubricant oil into the lubricant sump.

Abstract: A “TurboMotor” positive displacement rotary-piston machine comprises a casing having an annular working chamber and intake and exhaust ports, two drive shafts coaxial with the annular surface defining the working chamber and provided with rotary pistons on one end thereof and with arms on the other end thereof, a stationary central gear coaxial with the surface defining the working chamber and with the drive shafts, an output shaft concentric with the drive shafts and having an offset portion carrying a carrier and a planetary gear, the planetary gear being in mesh with the stationary central gear the carrier being pivotally connected to the arms of both drive shafts through the connecting rods. The annular working chamber of the casing communicates with the intake ports and exhaust ports and/or exit channels and entrance channels arranged sequentially and contiguously.

Abstract: Exemplary embodiments provide a progressive cavity pump or motor including a stator having a longitudinal bore and a rotor rotatably disposed within the longitudinal bore of the stator. The rotor includes a rotor core and a resilient outer layer formed of a resilient material bonded onto the outer surface of the rotor core. The resilient outer layer sealably connects the helical configurations on the outer surfaces of the rotor and the stator as the rotor rotates within the longitudinal bore of the stator.

Abstract: The present invention relates to a scroll pump (10) comprising two scrolls (20, 22) which are co-operable for pumping fluid from an inlet (24) to an outlet (26) on relative orbiting motion of the scrolls. Each scroll comprises a scroll base (30, 36) from which a spiral scroll wall (28, 34) extends generally axially towards the base of the opposing scroll. The pump comprises a tip seal arrangement comprising an axial end portion of one or both of the scroll walls which locates a tip seal (508) for resisting the passage of pumped fluid across the or both scroll walls between the or both scroll walls and the scroll base of the opposing scroll. The tip seal arrangement limits axial movement of the tip seal towards the scroll base of the opposing scroll along a first spiral region (507) of the or both scrolls between the inlet and the outlet.

Abstract: The present application relates to a scroll pump (10) which comprises two scrolls (20, 22) which are co-operable for pumping fluid from an inlet to an outlet on relative orbiting motion of the scrolls. Each scroll (20, 22) comprises a scroll base (30, 36) from which a scroll wall (28, 34) extends generally axially towards the base of the opposing scroll. At least a first portion of one or each of the scroll walls has formed in an axial end face (3 thereof a plurality of pockets (38) distributed along said first portion for disrupting leakage of fluid from a high pressure side of said scroll wall to low pressure side of said scroll wall.