230results about How to "Low start wind speed" patented technology

The invention discloses a method for collecting electric energy by utilizing low-speed airflow flow-induced vibration. According to the method, low-speed airflows are subjected to rectification and acceleration through a wind flow collecting passage, a flow surrounding vibration blunt body generates vortex shedding, the vibration blunt body is excited to vibrate, fluid flowing energy is converted into the vibration mechanical energy of the vibration blunt body, and an electro-magnetic induction generator is utilized for converting the vibration mechanical energy of the vibration blunt body into electric energy; and in the vortex forming process, the downstream moving is caused, a flexible piezoelectric vibration sheet is further excited to generate deformation and swings along with the vortex flowing, the vibration blunt body drives the flexible piezoelectric vibration sheet to move, and the fluid flowing energy is directly converted into the electric energy. The method for collecting the electric energy by utilizing low-speed airflow flow-induced vibration is simple, the required starting wind speed is low, the energy conversion efficiency is high, two modes including electro-magnetic induction and piezoelectric effect are adopted, and the electric generation capability is greatly improved.

A vertical shaft maglev wind power generator is composed of vanes, a rotary shaft, a power generator, a radial magnetic bearing, an axial TDOF magnetic bearing, an upper protection bearing, a lower protection bearing, an upper protection bearing retainer ring and a lower protection bearing retainer ring; the rotational part and the stationary part of the fan are not in mechanical contact, the mechanical friction in the fan is completely eliminated and the FDOF levitation of the fan rotor is realized. The axial magnetic bearing of the fan supplies gravity offset through 4 stator magnetic poles and the effect of a suction disc and performs axial translation and two radial rotational DOF control on the rotor; and the radial magnetic bearing finishes the two radial translation control of the fan rotor. The invention has reasonable layout of the components, completely eliminates the friction problem of the vertical shaft fan bearing, greatly reduces the starting wind speed of the wind power generator and improves the wind energy utilization rate.

The invention provides a megawatt-stage vertical shaft wind power generator with an adjustable attack angle. The vertical axis wind power generator comprises an electric power conversion device, a speed increasing box, a power generator, a variable pitch motor, a main vertical shaft, a cantilever cylinder, blade crossbeams, and blades with airfoils, wherein the cantilever cylinder is sleeved on the outer side of the main vertical shaft; the main vertical shaft is connected with the cantilever cylinder through a bearing; one end of each blade crossbeam is fixed on the cantilever cylinder, and blade autorotation devices are mounted at the other end of each blade crossbeam; a lightning rod is mounted at the top end of the main vertical shaft; an anemoscope is connected with an electronic control device; and the electronic control device controls the blade autorotation devices on each cantilever crossbeam, so as to enable the blades to adjust the windward angles according to a preset program and enable the power generator to be throughout in a state capable of producing the maximum torque. The starting wind speed is effectively reduced, and the wind energy utilization rate is increased.

The invention provides a vertical-axis wind-driven dynamo of a variable-attack angle resistance and lift mixed type, which comprises a power transfer device, a dynamo, a dynamo V-pulley mechanism, a main shaft, a sleeve, a cantilever bracket and blades, wherein the exterior of the main shaft is directly connected with the sleeve by a bearing, the sleeve is connected with the cantilever bracket which is provided with a blade rotating device, and the top end of the main shaft is provided with a wind vane; optimal attack angle control by utilizing the wind energy of the four blades which are driven by the motor is realized by a plurality of synchronous belt mechanisms; a low-pressure alternating current output by the dynamo is rectified by an inverter to output a direct current which is charged into an accumulator battery to provide the blade rotating device with a power supply; and a dogvane is connected with a controller which controls the blade rotating device. The invention adopts a vertical-axis windmill mode combining resistance type and lift type and can automatically adjust the attack angles of the blades according to a wind direction measured by the dogvane so that a blower is constantly in a state capable of generating the maximum torque, thereby effectively reducing the starting wind speed and improving the utilization rate of wind energy.

The invention discloses a Halbach permanent magnetic bearing obtained by lap piling of permanent magnetic rings having triangular sections. The Halbach permanent magnetic bearing comprises a rotor and a stator corresponding to the rotor. Multiple movable magnet rings are piled around the shaft of the rotor. Multiple static magnet rings are piled on the inner circle surface of the stator. The multiple static magnet rings and multiple movable magnet rings are respectively piled to form cylindrical structures. The movable magnet rings and the static magnet rings are obtained by lap piling of the permanent magnetic rings having triangle sections according to a Halbach array. The movable magnet rings and the static magnet rings comprise the permanent magnetic rings having triangle sections and different radiuses. The invention also discloses a magnetic force determination method of the Halbach permanent magnetic bearing obtained by lap piling of the permanent magnetic rings having triangle sections. The device and method have the advantages that obvious improvement of a radial force or an axial force is realized, a permanent magnet material is saved, an operation process is simple and accuracy is high.

The invention discloses a small vertical shaft magnetic suspension wind driven generator which comprises a static part and a rotating part, wherein the static part comprises upper and lower end cover baffle rings, upper and lower protective bearings, and upper and lower radial magnetic bearing stators which are symmetrically fixed on a vertical stator support shaft from outside to inside along the axial direction, and a generator stator fixed in the middle; an axial magnetic bearing static magnetic ring is fixed on the lower end cover baffle ring, and the stator support shaft is supported on a tower on the ground; the rotating part comprises a wind turbine blade fixed on the shell of a wind turbine; generator double outer rotors are respectively connected to the insides of the upper end cover and the lower end cover of the shell; radial magnetic bearing rotors are respectively embedded into the double outer rotors; and an axial magnetic bearing mobile magnetic ring is embedded to the inner hole of the lower end cover of the shell. According to the invention, the upper and lower radial magnetic bearings respectively realize suspension in four degrees of freedom, namely the left, the right, the front and the back; repulsive force between axial mobile and static magnetic rings and attraction between the mobile magnetic ring and a compression nut support the weight of the wind turbine and can keep balance of axial degree of freedom, thus realizing steady suspension, having no noise and no friction loss, and being low in start wind speed.

The roof wind driven generator set includes a wind mill of diameter smaller than 3 m, a short tower rooted on the roof beam, a generator fixed to the top of the short tower and connected to the generator room through bearings with heat sink, a housing of asymmetrical structure, an orientating wing in the outer surface of the housing for the wind inlet always in the wind direction, a lightning arrester and other parts. The generator is connected electrically to the power supply of the building and may provided with an incorporating regulator for incorporating to power network.

The invention relates to a passive gas jet method and a device for improving performances of a vertical axis wind turbine. When natural wind enters an inlet duct always installed facing the downwind direction, passes through a hollow steadying bar and is sprayed out of an air exhausting device installed at the external end or a thrust nozzle of a blade at the opposite direction to the rotation of a windmill, extra force moment for pushing the windmill to rotate is generated completely without any extra power consumption. The method not only obviously improves the output efficiency of windmill but also reduces the starting wind velocity and enlarges the operating range, thereby obviously reducing the generating cost. The invention belongs to the fields of windmill design, manufacture and application.

The invention provides a magnetic suspension wind power generator, comprising impeller, shaft, motor and bearings, where the impeller is arranged at one end of the shaft, the motor is arranged at the other end of the shaft, and one or two sides of the motor are equipped with bearings, and it is characterized in that: one or two sides of the bearing are equipped with magnetic suspension devices, which comprise one or one group of magnetic or magnetic-conducting rotators fixed on the shaft and magnetic stator device arranged outside the rotators, where the magnetic stator device comprises stator magnet which makes a height difference from the rotator and keeps an axial gap from the rotor. And the invention has features of simple, reasonable and compact structure, low cost, maintenance-free, reducing the starting wind speed of the wind power generator and able to effectively raise the output power of the power generator.

The invention discloses a permanent-magnetic wind driven generator, which comprises a base, a pair of base end covers connected to two ends of the base, a carbon brush and an electrical energy leading-out wire. The permanent-magnetic wind driven generator also comprises a wound rotor assembly, a permanent-magnetic rotor assembly and a pair of fan blades with opposite deflection angles; the permanent-magnetic rotor assembly is coaxially nested in the wound rotor assembly; the wound rotor assembly is coaxially nested in the base through the support of the pair of base end covers; the carbon brush is contacted with the wound rotor assembly and is fixedly connected to the side wall of the first base end cover; the electrical energy leading-out wire is connected with the carbon brush, and is led out through a corresponding open pore on the base; and the pair of fan blades with the opposite deflection angles are fixedly connected with the wound rotor assembly and the permanent-magnetic rotor assembly respectively. By adopting the permanent-magnetic wind driven generator, a wound rotor can rotate relative to a permanent-magnetic rotor at the same speed in the opposite direction, so the starting wind speed is reduced, and the utilization rate of wind energy is remarkably improved.

The invention discloses a flexible and retractable auxiliary blade mechanism of a vertical-axis wind turbine and belongs to wind turbines. According to the flexible and retractable auxiliary blade mechanism of the vertical-axis wind turbine, an auxiliary blade is assembled on an upper beam and a lower beam of the vertical-axis wind turbine and located between a main blade and a main shaft, a flexible auxiliary blade provided with a rigid balance weight bar is connected to the auxiliary blade through a coiling block, a dead bolt, a torsion spring, a bearing sleeve, a bearing and a fixed shaft are assembled in the coiling block, the fixed shaft is fixedly installed on the upper beam and the lower beam, a reel and a planar volute spiral spring are assembled on the upper beam and the lower beam, the two ends of a stay cord are connected to the rigid balance weight bar and the reel, and then the flexible and retractable auxiliary blade mechanism is formed. The flexible and retractable auxiliary blade mechanism is novel in structural design, scientific and reasonable in utilization of wind energy, high in adaptability, reliable in use and high in automation degree.

The invention discloses a stirring heating device capable of tracking the maximum wind energy utilization rate. The stirring heating device comprises a wind turbine, a gearbox, a heating device, a circulating pump, a heat exchanger and a stirring working medium. The stirring heating device is characterized in that signals collected by a wind speed sensor and a rotation speed sensor are input to aprogrammable logic controller (PLC) to be processed, then, output signals control a motor to drive the circulating pump, and the stirring working medium is conveyed from the heat exchanger to the heating device; the rotation speed of the wind turbine under the operation working condition is adjusted in real time, the utilization section of the wind speed is broadened, the wind turbine can operateat the optimal tip speed ratio under various wind speeds, and the maximum wind energy utilization rate is achieved through the wind energy stirring heating device; and the wind energy resource is effectively utilized, and the stirring heating device has important theoretical and engineering practical significance to sufficient and efficient wind energy utilization and has wide commercial prospects.

The invention belongs to the field of wind energy utilization, and discloses an approaching airstream energy recovery device of an electric automobile. The device comprises a generator, a wind energy concentration device and a wind turbine, wherein the wind energy concentration device is a pipeline of which an inlet and an outlet in the two ends are wide and the middle is narrow, and is arranged in a front cabin of the automobile; the inlet is positioned in the rear side of an air inlet grille of the automobile; the outlet is formed in the bottom of the front cabin of the automobile; the wind turbine is arranged in the wind energy concentration device; the generator and the wind turbine are connected through a permanent magnetic bearing; the tail ends of the wind turbine and the generator are connected with rolling bearings respectively; the wind turbine is formed by combining lift genre blades and resistance genre blades, so the starting performance and the actual operation performance of the wind turbine are improved; during the running of the electric automobile, an airstream which enters the front cabin of the automobile from the air inlet grille is firstly introduced into the wind energy concentration device, and flow field optimization is performed through rectification and speed-up effects of the concentration device; the optimized airstream flows to the blades of the wind turbine to drive the wind turbine to rotate, and the generator starts to work under driving of the wind turbine, so that the conversion of wind energy to electric energy is realized.

The invention discloses a novel axial magnetic flux double-salient permanent magnet generator. The technical problem that an existing generator is excessively complex in structure, large in self energy consumption and the like is solved. According to the technical scheme, the novel axial magnetic flux double-salient permanent magnet generator comprises a rotor, a generator outer stator, a generator inner stator, a permanent magnet ring and a rotor shaft. The generator inner stator is embedded in the generator outer stator, and a gap is reserved between the generator inner stator and the generator outer stator, the permanent magnet ring is installed in the gap, the rotor shaft is arranged in the center of the rotor, and the rotor shaft and the rotor are fixed into a whole; the rotor shaft penetrates through the center of the generator inner stator and is not in contact with the generator inner stator; the rotor is located above the generator outer stator and the generator inner stator. By means of the novel axial magnetic flux double-salient permanent magnet generator, a double-salient permanent magnet motor and an axial magnetic flux motor are organically combined; the novel axial magnetic flux double-salient permanent magnet generator has the advantages of being high in efficiency, high in power density, compact in structure, low in noise and low in starting air speed.

The invention discloses a self-adapting sail capable of generating power. The self-adapting sail comprises a movable wing-type blade, a hydraulic drive device, a hydraulic positioning device, a mast and a power generator, wherein the mast is arranged on a ship through a bearing; the lower end of the mast is connected to the input shaft of the power generator through a transmission mechanism; the movable wing-type blade consists of a plurality of blades; the movable wing-type blade is arranged in a slide block slot in the upper end of the mast through a supporting slide block mechanism; while closed, the outer surface of the movable wing-type blade is smoothly transited to integrally form a circular-arc-shaped sail form; and when power generation is needed, the movable wing-type blade is driven by the hydraulic drive device to stretch, and the position of each blade is fixed through the hydraulic positioning device, so that a vertical-axis wind driven generator form is integrally formed. According to the self-adapting sail, the ship utilizes the sail to assist navigation during navigation, and utilizes a fan to assist power generation during mooring, so that the utilization rate of wind energy is remarkably increased, and energy resources are saved.

The invention discloses a turbo type vertical shaft windmill, belonging to the field of wind energy utilization. The invention is characterized in that the windmill comprises a wind collector soleplate, a wind collector top slab, a left wind collecting plate, a right wind collecting plate, a volute case, an upper blade hoop, a lower blade hoop, a blade, a blade inner barrel, a shaft, a wind collector bearing, a tail fin of the left wind collecting plate, a guide plate of the right wind collecting plate, a right ventilation inlet, an air outlet of the wind collector, a guide lever, a guide lever bracket, a vertical guiding tail fin and a transverse tail fin. The shaft of the blade is arranged vertically; the wind collector soleplate, the wind collector top slab, the left wind collecting plate, the right wind collecting plate and the volute case form a wind collector; the volute case, the tail fin of the left wind collecting plate and the guide plate of the right wind collecting plate form a wind guiding device; the guide lever, the vertical guiding tail fin and the transverse tail fin form a wind mechanism. The invention has the advantages that the air current flows into the blade along the left wind collecting plate and the right wind collecting plate, and has the characteristics of good wind collecting performance, high utilization coefficient of the wind energy, and low starting wind speed.

The invention discloses a magnetoelectricity type micro generator which comprises a micro generator body and a power source. The micro generator body is a disc type permanent magnet micro generator. The power source is a wind turbine. The magnetoelectricity type micro generator obtains energy by the fact that the turbine converts wind energy, rotating mechanical energy is converted to electricity energy through the disc type permanent magnet micro generator, and the magnetoelectricity type micro generator is a high-power-energy-density micro energy device. A magnet in a rotor is an integral type axial multipole annular magnet machined with axial multipole magnetizing technology, the magnet and a magnet yoke are fixedly combined into a whole, and meanwhile a single-phase concentric type winding plane coil is used as a stator, and the coil is arranged in a floating mode. The magnetoelectricity type micro generator has the advantages of being simple in structure, small in size, large in power density, good in output voltage waveform (sine wave) and low in starting wind speed.

The invention relates to a vertical-shaft maglev wind-driven power generator. The vertical-shaft maglev wind-driven power generator consists of blades, a rotating shaft, a power generator, a radial permanent magnetic bearing, a radial hybrid magnetic bearing, an axial permanent magnetic bearing, an upper protection bearing and a lower protection bearing. Radial two degrees of freedom of the upper end of a wind turbine are realized through the permanent magnetic bearing, the power generator is arranged in the middle, the lower end is supported by the radial hybrid magnetic bearing in a two-degree-of-freedom manner, the axial permanent magnetic bearing is arranged at the bottom and is used for supporting the entire weight of the wind turbine, and when external disturbing force is very small and close to zero, five-degree-of-freedom stable levitation of a main shaft system can be realized without consuming any electric power. Since the rotating shaft supporting structure only has the radial hybrid magnetic bearing at the lower end, the radial two-degree-of-freedom active control of the lower end can be realized by changing current in a coil. The maglev supporting scheme fundamentally eliminates mechanical friction caused by the traditional mechanical supporting manner, reduces the starting resistance moment, thus reduces the wind speed for starting the wind-driven power generator and improves the utilization ratio of wind energy.

The invention discloses a method and a device for improving performance of a resistance-type vertical axis wind turbine, which belong to the fields of design, manufacture and application of wind turbines and are used for remarkably improving the pneumatic performance of the resistance-type wind turbine. The upwind side of the conventional resistance-type wind turbine is provided with an additional device capable of rotating along with the wind, the additional device is practically a contraction-expansion pipeline, and the inside at the throat of the pipeline is provided with an air suction port; and when the wind flows, a negative pressure area is formed at the air suction port due to the generated venturi effect to cause low pressure at the upwind side of the wind turbine and further greatly reduce the operating resistance thereof; and the rotating speed of the wind turbine is increased, and the torque thereof is improved, so the power coefficient of the wind turbine is remarkably improved. The device has the advantages of simple structure, low manufacturing cost and convenient implementation, can work more efficiently at the low wind speed area, can work safely under the condition of higher stop wind speed, and shows greater advantage in strong wind, so the annular power generation quantity is remarkably improved. Meanwhile, the wind turbine can be applied in ocean current and tide environments.

The invention relates to a wind power generation module which is in the shape of a cuboid and provided with a shrinkage curve wind power-gathering wind channel. A horizontal shaft vane wheel is arranged on a wind outlet of the wind power-gathering wind channel, and a rotation shaft of the horizontal shaft vane wheel is connected with an electric generator. The invention also provides a matrix wind power generation device which is erected on the ground and is provided with a plurality of wind power generation modules arranged in matrix, wind inlets of the wind power-gathering wind channels of the plurality of wind power generation modules face the same side, and any two adjacent wind power generation modules are fixed together by adopting a mechanical connecting structure. Compared with the traditional triple-propeller long-blade wind power generation device, the matrix wind power generation device has the advantages of high generating capacity in unit vane wheel area, low manufacturing cost, optional combination of installed capacity and capability of power generation in gentle breeze; and when more wind power generation modules are piled in a height direction by adopting the mechanical connection, generating capacity can be greatly increased by fully utilizing high altitude stream, thereby greatly reducing the generating cost and being the ideal mode of new generation of wind power generation.

The invention discloses a hot runner carbon fiber direct-shaping technique of vanes of a wind driven generator, which is implemented by steps of die assembly, injection, die maintenance and die sinking. In the injection step, raw materials fused in hot runner enter into the die cavity from at least five nozzles; the five nozzles are arranged along the length direction of the die cavity; the temperature of the raw materials passing through each nozzle is gradually increased by 3-5 DEG C from tip of the vane to the root of the vane of the wind driven generator correspondingly, ranging within thetemperature scope of fusion state of the raw materials.