摘要:
A horizontal-axis wind turbine using airfoil blades with uniform in width and thickness, comprising a tower installed vertically from ground surface, a nacelle rotatable connected to center of a vertical axis on top of the tower, a rotating body axially bonded to the nacelle, and one or more blades connecting and forming a pitch angle on the outer periphery of the rotating body, and the blade having an airfoil shape and having uniform in width and thickness in a longitudinal direction and generating torque from lift about a tip of the blade is provided.
摘要:
The present subject matter directed to a rotor blade assembly for a wind turbine having at least one rotatable aerodynamic surface feature configured thereon. The rotor blade assembly includes a body shell including a pressure side surface and a suction side surface extending between a leading edge and a trailing edge. The aerodynamic surface feature is disposed adjacent to the pressure side surface, the suction side surface, and/or both. In addition, the surface feature may have a generally airfoil-shaped cross section. As such, an actuator can be configured at least partially within an internal volume of the surface feature, the actuator being configured to rotate the surface feature relative to the body shell.
摘要:
A high-efficiency compressor section (10) for a gas turbine engine is disclosed. The compressor section includes a vane carrier (12) adapted to hold ring segment assemblies (16) that provide optimized blade tip gaps (28,29) during a variety of operating conditions. The ring segment assemblies include backing elements (30) and tip-facing elements (32) urged into a preferred orientation by biasing elements (40) that maintain contact along engagement surfaces (44,46). The backing and tip-facing elements have thermal properties sufficiently different to allow relative growth that strategically forms an interface gap (42,43) therebetween, resulting in blade tip gaps that are dynamically adjusted operation.
摘要:
A wave energy convertor for extracting energy from ocean waves. The wave energy convertor may include a buoy arranged to oscillate relative to a reference point about an equilibrium position and a negative spring device connected between the buoy and the reference point, wherein the negative spring device is for applying a positive force in the direction of displacement when the buoy moves away from the equilibrium position.
摘要:
The present subject matter directed to a rotor blade assembly for a wind turbine having at least one rotatable aerodynamic surface feature configured thereon. The rotor blade assembly includes a body shell including a pressure side surface and a suction side surface extending between a leading edge and a trailing edge. The aerodynamic surface feature is disposed adjacent to the pressure side surface, the suction side surface, and/or both. In addition, the surface feature may have a generally airfoil-shaped cross section. As such, an actuator can be configured at least partially within an internal volume of the surface feature, the actuator being configured to rotate the surface feature relative to the body shell.
摘要:
An object is to provide a cylinder driving device of a wind-power generation system capable of appropriately controlling a pitch angle of each rotor blade at a time of power failure with a simple configuration. The present invention achieves the object by including a piston connected to the rotor blade; a cylinder that moves the piston by a hydraulic pressure; an urging member that urges the piston in one direction; an accumulator that is connected to the cylinder, and supplies hydraulic oil urging the piston in an opposite direction to a direction where the piston is urged by the urging member to the cylinder; and an on/off valve that controls opening or closing of a channel between the accumulator and the cylinder.
摘要:
An improved sail restraint for Migler's vertical axis wind turbine in which excessive wind speed automatically causes the sails to be feathered, protecting them from wind damage, and, when the wind speed is reduced to an allowable level, the improved sail restraint automatically allows the sails to be reset to their nonfeathered, working position.
摘要:
A pendulum mass damper is directed to damping oscillation of tall buildings, towers or similar flexible structures requiring a low frequency tuned mass damper (TMD) for reducing a e.g. wind or earthquake induced displacement response of the structure. A mass (1) is balanced by a first spring system (2a, 2b, 2c) and supported by a carrying part (4) to maintain a vertical position, the carrying part (4) carrying the mass in the vertical direction extends between the mass and a position (C) below the mass, i.e. the weight of the mass is carried or supported from or at a point or level below the mass, wherein the mass at the position (C) below the mass is fixed and/or connected to a unit (5) constituting a base of a supporting system for the mass which unit is floating i.e. the unit can move either horizontally or both horizontally and vertically.
摘要:
A generating apparatus for converting kinetic energy from a water flow to electrical energy includes a housing including an inlet, a passage, and an outlet; an actuation device including a cylindrical member secured to the housing; an actuation member pivotably secured to the cylindrical member and having a spring biased downward extension in the passage and a horizontal lever; and a striking member disposed on an end of the lever; a rotational device including a power wheel rotatably mounted on a column; and a generator operatively connected to the rotational device. The generator produces electrical power output in response to water currents flowing through the inlet and impinging the extension, both the extension and the lever pivoting counterclockwise, the striking member hitting the power wheel, and the power wheel rotating about to the column. There is a guide member at an end of the downward extension.
摘要:
An elastic body and a linear compressor including the same are provided. The linear compressor comprises a cylinder; a piston reciprocating axially inside the cylinder; a drive unit disposed outside the cylinder; a stator cover coupled to a rear of the drive unit; a spring supporter comprising a body portion coupled to a rear of the piston and a seating portion extending outward from the body portion and disposed at a rear of the stator cover; a back plate disposed at a rear of the seating portion; a plurality of first elastic bodies disposed between the stator cover and the seating portion; and a plurality of second elastic bodies disposed between the seating portion and the back plate, wherein the plurality of first elastic bodies and the plurality of second elastic bodies each form a closed space in which a gas is accommodated.