Provided is a pitch apparatus of a wind turbine. The wind turbine includes a wheel hub and multiple blades. The pitch apparatus includes a pitch bearing, a transmission element and a driving mechanism for driving the transmission element. The pitch bearing includes a bearing inner race and a bearing outer race. The bearing inner race is fixedly connected to the blade, the bearing outer race is fixedly connected to the wheel hub. The transmission element is driven by the driving mechanism, and drives the bade and the bearing inner race to rotate in relative to the wheel hub. A load level of ultimate bending moment for a blade root and a safety factor of the pitch apparatus increase, failure risks of the pitch bearing, bolts and the transmission belt are reduced. A wind turbine having pitch apparatus are provided.

Substantially horizontal axis water turbine assemblies for generating electrical power in areas having poor sources of water flow including rotors mounted within housings in such a manner so as to minimize water resistance to the rotor blades with rotor blades passing through upper rotor return air spaces created within the housings and wherein the turbine assemblies may be mounted within support structures that both channel water flow to the turbine assemblies and facilitate access to the components thereof.

Disclosed are a wave power generation system for generating power by means of a hydraulic circuit, and a method for controlling same. The wave power generation system comprises: a tension transmission member for transmitting motion energy which is generated by means of six-degrees-of-freedom motion of a movable object floating on the waves; a power conversion unit comprising a fluid pressure generation unit which is connected to the tension transmission member and is for generating a fluid pressure; and an equalizer connected to the tension transmission member and for maintaining the tension of the tension transmission member. In the power conversion unit, if tension is applied from the tension transmission member, the fluid pressure generation unit enables a fluid to flow in a first direction by means of the tension and, if tension is not applied from the tension transmission member, the fluid pressure generation unit enables a fluid to flow in a second direction by means of the equalizer.

In a rotating machine having a fluidic rotor, the rotor comprises at least one blade mounted on an arm rotating about a rotor shaft forming a main axis of the rotor, the rotor being kept by a supporting structure in an orientation such that said axis is substantially perpendicular to the direction of flow of the fluid, the blade being mounted so as to pivot about an axis of rotation of the blade parallel to the main axis. The machine comprises means for generating a relative oscillation movement of the blade with respect to the arm at the axis of rotation of the blade, in order in this way to vary the inclination of the blade during the rotation of the rotor. Said means comprise, at the arm end, a mechanism comprising a first rotating element (A; B) known as the drive element and a second rotating element (B; A) known as the driven element, the elements being mounted on mutually parallel axes of rotation and separated by an inter-axis distance, the orientation of the drive element being controlled depending on the orientation of the rotor shaft while the orientation of the driven element determines the orientation of the blade, one of the rotating elements comprising a finger (D) spaced apart from its axis of rotation and the other rotating element comprising a groove (C) which receives the finger and in which the finger can slide. Application notably to wind turbines, to marine turbines and to nautical and aircraft propellers.

The present invention is directed to a system for producing energy via use of gravity. The system is for generating energy, and in particular electrical energy, by utilizing the abundant force of gravity that exists and then integrating such a force into a system design of energy power generation by converting the force of gravity into potential energy then into kinetic energy and from kinetic energy back into potential energy again, by using the system's autonomous methodology of fluid recycling to produce electric power generation in the process.

Device for conversion of wave energy into electrical energy and the process for its deployment at the exploitation location, wherein the device comprises a supporting construction composed of buoyancy elements and having a supporting tube attached on the upper side. The device comprises a joint gear on the inner circumference connected with the outside surface of the supporting tube in a sliding manner and a sphere to which is the floating body pivotally connected. The device has two gears, the first flexible gear for connecting the floating body to the second gear and the second gear for connecting the flexible gear to the generator. The flexible gear consists of pulleys and a flexible element, e.g. a rope or a steel cable and the second gear can be arranged in several suitable forms, e.g. rigid elements as a set of a gear and a rack positioned inside the lower supporting tube or a flexible element, e.g. a chain and a sprocket wheel set in the buoyancy element. The supporting construction is by ropes connected to the anchor weight that is made in a form of a sphere segment either directly or through the rolling elements placed in the spherical dent of the anchor base. The invention comprises the process for device deployment at the exploitation location which is particularly suitable due to stable transport with low draught.

Device for conversion of wave energy into electrical energy and the process for its deployment at the exploitation location, wherein the device comprises a supporting construction composed of buoyancy elements and having a supporting tube attached on the upper side. The device comprises a joint gear on the inner circumference connected with the outside surface of the supporting tube in a sliding manner and a sphere to which is the floating body pivotally connected. The device has two gears, the first flexible gear for connecting the floating body to the second gear and the second gear for connecting the flexible gear to the generator. The flexible gear consists of pulleys and a flexible element, e.g. a rope or a steel cable and the second gear can be arranged in several suitable forms, e.g. rigid elements as a set of a gear and a rack positioned inside the lower supporting tube or a flexible element, e.g. a chain and a sprocket wheel set in the buoyancy element. The supporting construction is by ropes connected to the anchor weight that is made in a form of a sphere segment either directly or through the rolling elements placed in the spherical dent of the anchor base. The invention comprises the process for device deployment at the exploitation location which is particularly suitable due to stable transport with low draught.

A adjustment unit for an azimuth adjustment and/or for a pitch adjustment of a wind turbine, to an adjustment apparatus, to a pitch adjustment apparatus, to an azimuth adjustment apparatus, to a wind turbine, and to methods for the rotor blade adjustment and wind direction tracking, and to the use of an adjustment unit and/or adjustment apparatus. The adjustment unit for an azimuth adjustment and/or for a pitch adjustment of a wind turbine comprises a drive unit which can be arranged on a first annular flange and has an eccentric shaft, a first engagement element which can be arranged on a circumference of a second annular flange which is arranged such that it can be rotated with respect to the first annular flange, a multiplicity of concavely and convexly configured first cam sections being arranged on a circumferential face of the first engagement element, and a second engagement element, with concave and convex second cam sections which are arranged on a circumferential face and correspond to the first cam sections.

A blade pitch drive comprising a driver sprocket, a driven sprocket, a toothed belt trained between the driver sprocket and driven sprocket, the toothed belt having a free span between the driver sprocket and driven sprocket, the free span having an arcuate form when the free span is in a slack condition, the toothed belt having a second span between the driver sprocket and driven sprocket in a tight condition when the free span is in a slack condition, and the free span operable as the second span and the second span operable as the free span according to an operating direction of the drive.

A mass displacement electricity generator, having a tower and a first mass suspended by the tower for falling and lifting. The first mass is suspended by a pulley arrangement including a first set of pulleys fixed to the tower above the first mass and a second set of pulleys fixed to the first mass. A cable extends through the first and second sets of pulleys and one end of the cable is fixed to one of the tower or to the first mass. A winch includes a barrel about which the cable winds off as the first mass falls and winds on as the first mass lifts. The winch is in driving connection with a flywheel so that as the first mass falls, the cable winds off the barrel and barrel rotation drives the flywheel to rotate. The flywheel is in driving connection with a generator so that rotation of the flywheel drives the generator for generating electrical energy.