Abstract:
Technologies relating to two way transmissions are disclosed. A two way transmission may comprise a differential or epicyclic gear train disposed inside a case, with input/output shafts extending out of case. A speed variator may link inputs and outputs of the differential or epicyclic gear train. The speed variator may comprise, inter alia, a continuously variable transmission (CVT) and a speed range gear. The CVT may link to an input/output shaft outside the case, and the speed range gear may link to an input/output shaft or carrier gear inside the case.
Abstract:
Bei den meisten im Einsatz befindlichen Windkraftanlagen ist der Generator mit dem Rotor am oberen Ende des Turms angeordnet und die erzeugte elektrische Energie wird über Kabel nach unten geführt. Um das Kopfgewicht, d. h. das Gewicht von Rotor mit Maschinengondel, zu reduzieren, wird zwischen Rotor und Generator üblicherweise ein Getriebe geschaltet, um die Verwendung von schnell laufenden und leichteren Generatoren zu ermöglichen. Aufgabe der Erfindung ist es, das Kopfgewicht einer Windkraftanlage bei gleicher elektrischer Leistung zu verringern. Die Kombination eines vergleichsweise kleinen mechanischen Getriebes mit einem ein- oder mehrstufigen Riemengetriebe ermöglicht hohe Drehzahlen an der Generatorwelle und damit kleinere und leichtere Generatoren. Bei zwei Getrieben sind jeweils kleinere Übersetzungen pro Getriebe möglich. Wenn das mechanische Getriebe dem Riemengetriebe nachgeschaltet ist, werden die durch Windlasten am Rotor verursachten Schläge durch das vergleichsweise unempfindliche Riemengetriebe gedämpft. Dadurch wird das mechanische Getriebe weniger beansprucht und verursacht geringere Investitions- und Wartungskosten.
Abstract:
An offshore floating wind turbine for electric power generation comprising a tower (1) with a bottom portion (1 b) water-tightly connected to an upper portion of a water-tight container body (1d) which comprises an inner machine room (12) housing an electric power generator (22); an inner hollow (1c) of the tower (1) extending into the machine room (12); transmission means (4) extending through the inner hollow (1c) of the tower (1), for transmitting rotational movement of the rotor (25) to the electric power generator (22); receiving portion (2a) of the floating base (2) into which at least a lower portion of the container body (1d) is rotatably inserted; driving means (11) driven by at least one electric motor (3) and arranged around an outer peripheral portion (1 e) of the container body (1d) to engage the peripheral portion (1e) to rotate the container body (1d) within the receiving portion (2a).
Abstract:
A wave energy converter (WEC) system includes WEC devices which can function to produce useful energy (power) efficiently in response to heave motion and/or pitch motion and/or roll motion. Pitch responsive devices are deployed around the outer periphery of a container and one (or more) heave responsive device is located about the center of the container. The pitch responsive devices may be of the type defined as PDWECs which include two reaction masses which are primarily operable in response to pitching motion or they may be of the type which includes one reaction mass operable in response to pitch and/or heave motion,
Abstract:
A vertical axis wind turbine with blades which articulate to reduce drag when they are moving upwind and which are suitable for use in small scale electrical generators. The turbine has blades which are rotatable about a blade axis of rotation and said blade axis is rotatable about a turbine axis of rotation. A vane is coupled to the blade axis of rotation to change the orientation of the blades in response to changes in wind direction. The vane maximises the effect of the wind on the one or more blade by adjusting the blade position to maximise the blade surface area facing into the wind when the blade is moving downwind and to minimise said blade surface area facing into the wind when the blade is moving upwind.
Abstract:
Several embodiments of a device for economically harvesting wave energy are disclosed. A sealed vessel for air storage, the spar buoy, is mostly submerged under water is also used as an inertial body that surface floats move relative to. The spar buoy may take many geometrical forms, but all have a stem that is above the water surface. Piston pumps are placed at the top of the stem. The pump has a gearing reduction to optimize the rotational motion of the pump drive shaft. Small angular motion at the drive shaft results in multiple cycles of linear reciprocal motion of the piston. Various mechanisms could convert the relative motion between the floats and the spar buoy to a rotational motion of the shaft. The compressed air generated by the pump is stored in the spar buoy and regenerated as electrical energy by expanding the compressed air in a turbine.
Abstract:
A device for harnessing wind energy to supply power to a load. This device comprises a duct made of duct sections of uniform cross section or a plurality of Venturis to channelize wind and converts the kinetic energy of the wind to mechanical energy which is further converted into electrical energy which is supplied to the load.
Abstract:
Device producing unidirectional rotation motion as output from any bidirectional rotation motion as input, comprising : - a first input rotation axis (1); - a second input rotation axis (2), orthogonal to the first input rotation axis (1); - an output rotation axis; transmission means (6A, 6B, 6C, 91, 9B, 9C) provided between the first input rotation axis and the output rotation axis and between the second input rotation axis and the output rotation axis, in order to convert a clockwise or anti-clockwise rotation motion on the first input rotation axis and/or on the second input rotation axis into a unidirectional rotation motion on the output rotation axis, characterized in that one of the first input rotation axes is the same as the output rotation axis.
Abstract:
Eine Windkraftanlage (10) zur Erzeugung von elektrischer Energie aus Windkraft mit einem vom Boden (12) aufragenden Turm (14), einem durch Wind antreibbaren Rotor (16), welcher oberhalb des Bodens (12) am Turm (14) angeordnet ist, sowie einem Generator (18) zum Umwandeln mechanischer Energie in elektrische Energie wird bereitgestellt. Die Windkraftanlage (10) ist dadurch gekennzeichnet, dass der Generator (18) im Bereich des Bodens (12) angeordnet ist und die Windkraftanlage (10) umfasst weiterhin: eine Kraftübertragungseinrichtung (20) zur mechanischen Kraftübertragung vom Rotor (16) zum Generator (18), sowie einen Schwungspeicher (22) zum Speichern kinetischer Energie mittels Drehung einer Schwungmasse (24), wobei der Schwungspeicher (22) eine Kupplungseinrichtung (26) aufweist, mit der die Schwungmasse (24) derart mit dem Generator (18) zur mechanischen Übertragung von Rotationsbewegung gekoppelt ist, dass die Schwungmasse (24) erst ab einer bestimmten Mindestdrehzahl des Generators (18) in Bewegung versetzt wird.
Abstract:
A device for a wave-powered generator which is provided with at least one energy generator (19) and lines (35) for trans-ferring energy to a consumer, the wave-powered generator com-prising - a main module (1) provided with a running rod (2) which is substantially vertical in its longitudinal extent, several supporting devices (13) arranged around a portion of the running rod (2) and arranged for sliding or rolling movement on surface portions extending in the longitudinal direction of the running rod (2), at least one sheave (15a, 15b) which is arranged to roll on the running rod (2), and transmission means (10) which are arranged to translate the rotating motion of the at least one sheave (15a, 15b) into rotation of the drive shaft (19a) of the at least one generator (19); and - a first float (3) which is floatingly disposed in an area affected by waves (5) and which is connected to the running rod (2) by a primary driving line (4) substantially of tensile strength.