1296 results about "Wave power generation" patented technology

Described herein are marine devices and methods that convert mechanical energy in one or more waves to mechanical energy that is better suited for conversion into electrical energy. The marine devices employ a mechanical energy conversion system that harnesses wave energy and converts it into limited motion that is suitable for input to an electrical energy generator.

Described herein are systems and methods that use an electroactive polymer transducer to convert mechanical energy, originally contained in one or more waves, to electrical energy. Marine devices described herein may employ a mechanical energy conversion system that transfers mechanical energy in a wave into mechanical energy suitable for input to the electroactive polymer transducer.

A floating type wave power generation system is characterized in that the system consists of eight sets of lever-type floating bodies and a hydraulic energy accumulation converter with the hydraulic pump function. On a floating workbench 7, eight sets of levers 2 and a floating body 1 are connected through supporting hinge bearers 10 and 11; in this way, the highly undulating displacement caused by waves can be converted to relatively lesser displacement of a piston rod 4, and the minor force that the floating body bears can be converted through the lever to the major force on the piston rod. The piston rod drives a hydraulic tank 3 to switch and transmit the hydraulic energy through a connecting oil pipe5, a high-pressure oil pipe6, a hydraulic oil tank and four no-return valves of each set to a hydraulic motor in a hydraulic power generation control chamber 9; in this way the generator is driven to work. The present system can absorb, convert and accumulate the intermittent unstable wave energy in a highly effective way and can buffer the destructive effect of waves. The floating platform can be suitable to different marine space by adjusting the length of an anchor chain 8. And in various sea conditions, kinetic energy and potential energy possessed by waves in the sea surface can be converted and accumulated as hydraulic mechanical energy by utilization of the wave drop; thus the generator is driven to unremittingly provide electric power.

Systems are provided for obtaining electrical energy from sea waves using deflectable material, especially EAP (electro-active polymers) type SSM (stretchable synthetic material) that generates electricity when an electrostatic charge is applied to the polymer and it is stretched. In one system (10), a buoyant element (12) has upper and lower parts (14, 22) connected by a quantity (36) of SSM, with the lower part anchored at a fixed height above the sea floor (24) and with the upper part movable vertically to stretch and relax the SSM as waves pass over. In another system (50) the buoy is rigid, but is anchored to the sea floor by at least one line (60) that includes, or is connected to at least a length (64) of SSM material. In still another system (160) a plurality of rigid buoys (162) that float on the sea surface, are connected in tandem by SMM (166, 172) that is stretched and relaxed as the buoys pivot relative to each other in following the waves. The buoys preferably lie with at least 80% of their volume below the average sea surface.

The linear dynamo used in wave power generation relates to a permanent magnetic linear synchronous motor, which comprises a primary pole and a secondary pole. The primary pole of the permanent magnetic linear synchronous motor comprises two primary iron cores (2), a primary tri-phase winding (3). The primary tri-phase winding (3) is bedded in the wire ducts of the primary iron cores (2). The secondary pole comprises a secondary permanent magnet (1) which is arranged on a buoy (6) by a spring (5). The bottom of the container which contains the linear dynamo is fixed on the seabed. Both the primary pole and the secondary pole of the linear dynamo are in rectangle shape. The secondary permanent magnet (1) is positioned between the two primary iron cores (2). And air gaps (4) are provided between the secondary permanent magnet (1) and the two primary iron cores (2). The invention uses the linear dynamo instead of traditional rotating dynamo, with non-contact driving, reduces the dielectric loss and increases the electricity generation efficiency; sustains the pressure of wave, with strong structure; has the advantages of no poisonous gas released, no extra noise, environment-protection and health, with the cost as low as common electricity generation.

The invention discloses a hydraulic transmission-based method and a hydraulic transmission-based device for storing energy and realizing stabilized voltage and constant frequency in wave power generation. In the device, a floating pendulum is connected with a hydraulic cylinder, high pressure oil outputted by a non-rod cavity of the hydraulic cylinder enters a high pressure energy storing device and an oil inlet of a variable motor through a control integrated valve and through a high pressure oil tube, low pressure oil outputted by an oil outlet of the variable motor enters a low pressure big-capacity energy storing device and returns to the rod cavity of the hydraulic cylinder through the control integrated valve, the main shaft of the variable motor is connected with a permanent magnet synchronous generator, and the permanent magnet synchronous generator is connected to a rectifying module and a direct-current electric energy charging-discharging control module and then connected to a stepless unload adjustable load and a storage battery. The high pressure energy storing device and the low pressure big-capacity energy storing device realize the energy storage by absorbing the fluctuation, caused by the change of transient waves, of pressure and flow rate. A controller realizes the pressure stabilization constant frequency by the stepless unload adjustable load and the displacement of the hydraulic motor respectively. The device has the advantage of making the wave power generating device output more smoothly, more free from influence of the wave impact and have higher efficiency.

An apparatus for converting wave energy into electrical energy includes a wave power generation unit including a frame and float guides. A wave power generation float is joined to the float guides for vertical motion in response to the wave energy. The wave power generation float includes at least one wave power conversion module. The wave power conversion module includes a module case and an air sealing tube formed in the module case for generally preventing fluids from entering the module case. A power transmission cable transmits electrical energy where one end of the power transmission cable passes through the air sealing tube and is joined to the frame. A cable reel winds and unwinds the power transmission cable. A power transmission drive translates a bidirectional rotation of an input shaft into a unidirectional rotation. A generator generates electrical energy in response to the unidirectional rotation.

The invention discloses a multi-functional combined ocean power generating platform capable of being congregated and a congregating group. The congregating group comprises a plurality of polygonal power generating platform bodies, each of the power generating platform bodies comprises buoy platforms, vertical axial wind driven generators, solar power generating units, tidal power generating units, wave power generating units and an ocean aquaculture region, wherein a buoy platform is arranged at each of polygonal angle points; a vertical axial wind driven generator and a solar power generating unit are arranged at the top of each of the buoy platforms; a tidal power generating unit is arranged at the bottom of each of the buoy platforms; the wave power generating units are used for connecting the buoy platforms in a flexible manner; the ocean aquaculture region is formed by surrounding a fishing net hooked in the wave power generating units. According to the congregating group disclosed by the invention, various power generation such as wind power generation, solar power generation, tidal power generation and wave power generation, fishery aquaculture and sea water desalination are integrated, structure problems caused by large spans among buoys in rigid coupling can also be solved, mutual interference distances among the vertical axial wind driven generators are short, the gravity center of a generator group on the platform is lower, distances among the buoys are short, wave energy can be collected, and impact from waves to the buoys is retarded.

A wave power generation system adaptive to tidal fluctuation comprises a seafloor foundation which is arranged on seabed, two or more than two guide pile legs and a hydraulic lifting system which are fixed on the seafloor foundation respectively, and a support framework which is connected to the top end of the hydraulic lifting system. The support framework is movably connected with the two or more than two guide pile legs and rises and drops along slide ways which are arranged on the guide pile legs driven by the hydraulic lifting system, a swinging plate device which swings with the wave of the sea water and a power generation device which is connected with the swinging plate device are arranged on the support framework, and a tide level sensor which is connected with the hydraulic lifting system through a lead is installed on the part of the swinging plate device above the sea surface. The wave power generation system adopts the automatic hydraulic lifting system, needs no human operation and can adjust the position of the swinging plate device with the tidal fluctuation; moreover, the wave power generation system has advantages of high energy conversion efficiency, simple mechanism, high reliability, low production cost and the like.

The invention discloses a wave power generation device based on a linear magnetic gear motor. The wave power generation device comprises a motor stator core, a motor converter, a magnetism regulating ring, a magnetic gear low-speed moving part, an inner floating barrel and an outer floating barrel. The motor stator core is sleeved with the motor converter, the motor converter is sleeved with the magnetism regulating ring, the magnetism regulating ring is sleeved with the magnetic gear low-speed moving part, the magnetic gear low-speed moving part is sleeved with the inner floating barrel, and the inner floating barrel is sleeved with the outer floating barrel. A first air gap is formed between the motor stator core and the motor converter, a second air gap is formed between the motor converter and the magnetism regulating ring, and a third air gap is formed between the magnetism regulating ring and the magnetic gear low-speed moving part. A motor stator shaft and the magnetism regulating ring are fixed in position, and the magnetic gear low-speed moving part and the inner floating barrel are fixed in position. The wave power generation device has the advantages that no huge speeders need to be additionally arranged, the size is small, energy capture and power generation efficiency is high, and convenience is brought to design, debugging and maintenance of an electrical control system through the whole floating suspended structure.

The invention discloses a wave-activated power generation method and a system for implementing the same, which is mainly used for solving the problems that the existing wave-activated power generation method is complicated in technique and high in cost, the power generating system is short in service time, and the like. The invention is characterized in that the wave-activated power generation method comprises the following steps: carrying out conversion between the mechanical reciprocating motion and the one-way rotary motion on a discrete power source by way of combining an overrunning coupler and a straight bevel gear so as to drive a multipolar squirrel-cage AC (alternating current) asynchronous motor to generate power; connecting the multipolar squirrel-cage AC asynchronous motor by the overrunning coupler, so that the AC asynchronous motor keeps running by virtue of the input revolving speed of a transcendental inertial source power at a low ebb; and setting a plurality of multipolar squirrel-cage AC asynchronous motors and matching devices so as to generate power by way of combining the motors and the devices to the grid. The method and system provided by the invention have the advantages that the whole power generation process is performed in a full-automatic and self-adapting state, and no other electrical and mechanical control measure is required, therefore, the control on wave-activated power generation, which is high in technique, high in efficiency and low in cost, can be realized.

The invention provides a submerged floating energy-gathered guiding type wave power generation platform and belongs to the field of ocean engineering and wave power generation equipment technologies. The submerged floating energy-gathered guiding type wave power generation platform is high in wave energy utilization rate and comprises a submerged floating body, an energy conversion device and a mooring system. The platform can adapt to multiple working conditions by controlling and adjusting ballast water quantity in ballast tanks in the submerged floating body through an automatic adjusting ballast water system and can not be affected by tide level changes and water level changes. The platform can adapt to wind wave current force in different directions by adjusting the mooring system so that a swing board on the platform can be adjusted to the head sea working direction. The wave end of the submerged floating body is provided with a contracted energy-gathered guiding wave path and can substantially improve the wave energy conversion rate. The bottom of the submerged floating body is provided with an electric generator, storage batteries and other energy conversion devices. The maintenance cost is low, the conversion distance from mechanical energy to electric energy is shortened, and the generating efficiency is improved. According to the submerged floating energy-gathered guiding type wave power generation platform, a power generation system can be established in a nearshore sea area just through the manner that the submerged floating body is located through anchor chains, and the submerged floating energy-gathered guiding type wave power generation platform is a reliable, efficient and economical marine power generation platform.

The invention discloses a circumference magnet-cutting fluid power generation device, which comprises a rotor, a stator and a rear-end processing circuit, wherein the rotor comprises a rotary bearing, a blade and an inner wheel; one end of the blade is connected with the rotary bearing, and the other end of the blade is connected with the inner wheel; the stator comprises an outer wheel and a supporting structure, which are connected with each other; a wire is connected with the rear-end processing circuit; a magnet is arranged on the inner wheel, and the wire is arranged on the outer wheel; or, the wire is arranged on the inner wheel, and the magnet is arranged on the outer wheel; and the blade is driven by fluid and stressed, the inner wheel rotates and moves relative to the outer wheel, and the wire cuts a magnetic force line which is generated by the magnet to generate induced electromotive force, so current is generated. According to the characteristic that the circumference of the inner wheel of the rotor has maximum line speed, the magnetic force line is directly cut for power generation, and the circumference magnet-cutting fluid power generation device can be applied to the fields of wind power generation, river power generation, wave power generation, tail gas power generation and the like, and is simple in structure, high in efficiency and low in cost.

The invention provides a novel pendulum-rod-type ocean wave energy power generation device which comprises a pendulum rod, a connecting rod mechanism, a gear mechanism, built-up gears, a power generator gear, a power generator, a base and a plurality of bearings. The pendulum rod converts undulatory motion of waves into oscillating of the pendulum rod, two sides of the pendulum rod are connected with the gear mechanism and the connecting rod mechanism respectively, the gear mechanism and the connecting rod mechanism drive the built-up gears corresponding to the two sides of the pendulum rod to rotate, a hub and a gear ring of each built-up gear are separated, a clutch mechanism is arranged between the hub and the corresponding gear ring to enable the corresponding built-up gear to be capable of only working unidirectionally and outwards, and the power generator gear is fixed on an input shaft of the power generator and arranged between the two built-up gears. The whole device is assembled into a whole through the base, can be fixed on a sea floating body or a ship for power generation and is a novel small wave power generation device, the problem that existing wave energy power generation devices are low in power generation efficiency, high in cost and the like is effectively solved, and the novel pendulum-rod-type ocean wave energy power generation device has great significance in ocean energy development.

An up-and-down oscillating and swinging combined type efficient wave power generation device comprises a liquid level sensor, floating blocks, anticorrosive oil cylinders, a swinging oil cylinder, a second supporting board, a platform body, a first hollowed-out part, pile legs, a hydraulic system, a nut, a bearing bracket, a lead screw, a supporting frame, a motor, a connection board, sliding rails, sliding blocks, a first air cylinder, first pin shafts, a first supporting board, a shearing fork arm, second pin shafts, a second hollowed-out part, a connection column, a weight and a controller, wherein the four pile legs are symmetrically installed on the platform body; the controller and the hydraulic system are installed on the platform body; the anticorrosive oil cylinders are installed on the left and right sides of the pile legs and are connected with the hydraulic system through pipelines; piston rods of the anticorrosive oil cylinders are connected with the floating blocks; the floating blocks are installed on the pile legs. The up-and-down oscillating and swinging combined type efficient wave power generation device has the advantage of being capable of utilizing the up-and-down floating kinetic energy and swinging kinetic energy of waves at the same time.

The present invention is related to a method and system for wave power generation. When a floating body rises with the wave, a hydraulic cylinder is being pulled to drive a hydraulic motor; the hydraulic motor will in turn drive the generation of power. When a stroke action of the hydraulic cylinder is completed, signals will be transmitted to a drum to release the rope, at which time the hydraulic cylinder will be reset. When the reset is completed, the distance between the floating body and the anchor base increases, the hydraulic cylinder is pulled again, thus repeating the above process. When the floating body drops along with the wave, the hydraulic cylinder is reset at first and then the drum retracts the rope. This system can automatically reset the hydraulic cylinder and do work multiple times during the process of one rising wave.

The invention discloses a mixed-type wave power generation device. The device is composed of a wave energy conversion device capable of absorbing kinetic energy of a floater in multiple degrees of freedom, and a hydraulic type energy output system arranged inside the wave energy conversion device, and belongs to a wave power generation device. The wave energy conversion device captures wave energy and further converts the energy into mechanical reciprocating motion, and the hydraulic type energy output system conducts peak clipping and valley filling on captured fluctuation energy and outputs the energy to an electric generator stably. The mixed-type wave power generation device has the characteristics of being high in energy capture width ratio and sea condition adaptability, and meanwhile capable of capturing the kinetic energy of the floater in multiple degrees of freedom, thereby being a mixed-type wave energy conversion device.