EP2044323A2 - Wind-powered device for producing electrical energy - Google Patents

Abstract

The invention relates to a wind-powered device for producing electrical energy, comprising an electric generator set (1) which works by converting mechanical energy into the electrical energy, a wind-powered set (3) designed to capture the energy of the wind and convert it into mechanical energy, a transmission (2) positioned between said wind-powered set (3) and said generator set (1), said transmission (2) being designed to transmit mechanical energy produced by said wind-powered set (3) to said generator set (1), characterized in that said wind-powered set (3) comprises at least two air turbines known as wind turbines (4) comprising non-coaxial shafts (5) coupled to the transmission (3), said wind turbines (4) being designed in such a way as to present an equivalent surface area to the wind that exceeds the surface area exposed to the wind of each of the wind turbines (4).

Description

 WIND POWER DEVICE FOR GENERATING ELECTRIC POWER

The invention relates to a wind power device for producing electrical energy.

The constant increase in the costs of fossil fuels combined with a depletion of fossil fuel reserves - oil, coal, natural gas - and an awareness of the imbalance they cause on the carbon cycle, lead to a great deal of research aimed at to develop renewable and inexhaustible energy production devices, including wind power generation devices. There are many wind power generation devices. The general principle of these devices, which derives from the principle of windmills used formerly for pumping water or grinding grain, is to use the force of the wind to drive a rotating shaft and to place an electric machine, such as a generator, at the end of this tree, so that it can transform the mechanical energy of the tree into electrical energy. To do this, a wind turbine device typically comprises a paddle wheel adapted to ensure the rotation of a shaft by transforming the energy of the wind into mechanical energy, a rotor comprising magnets and coils, arranged at the end of the shaft and whose rotation allows the generation of an inductive field captured through the stator of an alternator, which ensures the production of an electric current.

It is in particular known to arrange a plurality of wind turbines in a given space to form a wind power plant. Each wind turbine of the wind power plant comprises a shaft at one end of which is arranged an electric machine, such as a generator. The currents generated by this plurality of generators are added by the wind power plant for the purpose of being conveyed by a power transmission network to users.

The quantity of energy produced by a wind turbine being, as a first approximation, proportional to the speed of rotation of the rotor of the electric machine, itself dependent on the speed of rotation of the wind turbine, known devices use blades as large as possible so as to achieve high speeds, including low wind.

In addition, large blades can achieve a sufficient start torque to start the wind turbine. The disadvantages of such a device concern the complexity of the device, especially with regard to the design of the blades, the difficulties of installation and implementation, manufacturing costs, the noise generated by the rotation of the blades, etc. Such devices are therefore reserved for large energy producers, must be installed far from homes, and are, as such, totally unsuitable for urban or peri-urban household use.

To facilitate the start of wind turbines, without however resorting to oversized blades, it is known to add a device, including electrical, help start wind turbines.

This solution only reinforces the disadvantages related to the complexity and the cost of such a device.

To alleviate some of these problems, other devices have been proposed to increase the rotational speed of the rotor and the start torque without, however, using oversized blades. For example, JP 2004-162684 discloses a wind power generating device comprising two wind turbines adapted to rotate in opposite directions, one comprising the rotor of the alternator and the other comprising the stator of the alternator. Therefore, the apparent rotational speed of the rotor relative to the stator is substantially doubled compared to a fixed stator device.

The disadvantage of this device concerns in particular a poorly optimized performance due to the arrangement of the paddle wheels facing one another, the lee wheel then necessarily being less in the wind than the wind wheel . In addition, the wind wheel creates turbulence that can impede the proper rotation of the wheel downwind.

JP 2004-340116 discloses a wind turbine device comprising a shaft around which is arranged a plurality of paddle wheels and at the end of which is arranged a generator. Such a device therefore allows the generation a high starting torque, which allows the drive of the rotor. Generator without booster assist device.

On the other hand, the speed of rotation of the rotor is limited and remains dependent on the dimensions of the paddle wheels arranged on the shaft of the device. Moreover, the problem related to the arrangement of wheels in the wind and leeward remains.

The object of the invention is to provide a wind power device for producing electrical energy that overcomes the aforementioned drawbacks.

The invention relates to a wind generator device

10 of electrical energy that is economical, and whose implementation is simple and does not require fine and / or complex adjustments.

The invention relates to a wind power device for producing electrical energy that generates little noise.

The invention also relates to a wind power device 15 for producing electrical energy suitable for domestic use.

The invention also relates to a wind power generating device that is adapted to urban and peri-urban use.

The invention also relates to a wind power device for producing electrical energy whose maintenance is easy, including by a non-specialist.

To do this, the invention relates to a wind power device for producing electrical energy comprising:

an electrical energy generator group adapted to generate an electrical energy by a conversion of a mechanical energy

25 in this electrical energy,

- a wind group adapted to capture wind energy and convert it into mechanical energy,

a transmission arranged between said wind group and said generator group, said transmission being adapted to transmit a transmission

Mechanical energy produced by said wind group at said generating unit, characterized in that said wind group comprises at least two air turbines, called wind turbines, comprising non-coaxial shafts coupled to said transmission and arranged so that said wind turbines can have a wind surface, said equivalent surface, greater than the windward surface of each wind turbine.

A wind turbine device according to the invention thus allows the production of electrical energy by the cooperation of at least two non-coaxial wind turbines with a generator group. In addition, a device according to the invention comprising at least two non-coaxial wind turbines arranged so that they can have a surface equivalent to the wind greater than the wind surface of each wind turbine, allows the area of surface equivalent to the wind swept by all the wind turbines during their rotations is greater than the area of the wind surface swept by each of these wind turbines during their respective rotations. The windward surface of a wind turbine is the surface of a wind turbine in direct contact with the wind, before it is partially braked by other wind turbines. In other words, it is the surface of a wind turbine which is not masked by any other wind turbine of the device. The power recoverable by a wind turbine being in first approximation proportional to the area of the surface swept by the blades of the wind turbine and to the cube of the wind speed, a device according to the invention makes it possible to provide more power than wind turbine device comprising wind turbines with coaxial shafts. Throughout the text, two wind turbines are said to be non-coaxial if their trees are non-coaxial.

The inventors have succeeded in overcoming the prejudice of the person skilled in the art who systematically arranges the electrical machine for generating electrical energy in the axis of the wind turbine. In particular, the inventors have determined that a wind device, comprising at least two non-coaxial wind turbines, in particular of small dimensions, makes it possible to generate a quantity of electrical energy that is sufficient for domestic applications, despite a loss of yield induced by the use. a more complex transmission than in the prior art. Moreover, a wind turbine device according to the invention comprising wind turbines whose arrangement allows the equivalent surface directly in the wind force swept by all wind turbines is greater than the wind area of each wind turbine, contributes to provide a high starting torque, without, however, requiring a start-up device.

Moreover, the inventors have devised a device at lower cost by replacing the electrical addition of wind turbine devices of the prior art, by mechanical addition. In particular, it is more economical to develop a mechanical transmission adapted to ensure the rotation of a single shaft from the rotation of a plurality of shafts than to have a plurality of electrical machines. Therefore, a wind turbine device according to the invention may comprise a plurality of non-coaxial wind turbines and a single generator, which allows the generation of electrical energy more economically than with the devices of the prior art.

The generator group according to the invention may comprise one or more electrical machines. Nevertheless, advantageously and according to the invention, said generator group comprises a single electric machine.

An electric machine according to the invention is in a known manner a DC generator, a permanent magnet alternator or a brushless alternator.

An air turbine according to the invention may be an axial turbine or a radial turbine. Typically, an axial air turbine is in the form of a horizontal axis turbine and a radial air turbine is in the form of a vertical axis turbine. In particular, an air turbine according to the invention may be a wind turbine known as a conventional wind turbine, comprising a plurality of blades arranged around a shaft and forming a propeller, a wind turbine, a wind turbine Savonius type with a horizontal or vertical axis, a wind turbine of the classical Darrieus or delta type, etc. . Nevertheless, advantageously and according to the invention, said wind group comprises at least two axial air turbines comprising non-coaxial shafts coupled to the transmission and arranged so that said turbines can have a wind surface greater than the wind surface of each of the turbines.

An axial air turbine is an air turbine which has a good price / performance ratio and whose manufacture and implementation are easy.

A transmission according to the invention can be of any known type. A transmission according to the invention makes it possible to transmit to the generating unit a mechanical energy produced by the wind group, the wind group comprising at least two non-coaxial wind turbines, such that the mechanical energy produced by the wind generator, in particular the torque at the start-up of the wind farm, may be more important than that produced by a previous-party wind farm.

Advantageously and according to the invention, said transmission comprises at least one shaft, said drive shaft, coupled to said generator unit, and at least one shaft, said input shaft, coupled to said wind generator, said input shaft being rotated by at least two non-coaxial shaft wind turbines of said wind group.

Couplings between rotating shafts are easy to perform and allow torque and speed transmissions with known performance. Moreover, the kinematics of such couplings is easy to understand and allows simple maintenance, including by a non-specialist.

Furthermore, a transmission according to the invention comprising at least one input shaft adapted to be driven in rotation by at least two non-coaxial wind turbine shafts makes it possible to supply the input shaft with a torque at start greater than the torque of each of these wind turbine trees.

Therefore, the torque transmitted to the motor shaft may be greater than the torque of each of the wind turbine shafts. However, it is known that the torque at starting of a wind turbine shaft is proportional to the area swept by the wind turbine, that is to say, the length ^'and / or width of the blades which constitute this wind turbine. For this reason, in particular, the wind turbine devices typically comprise large blades to allow the provision of a sufficient starting torque and compatible with the rotation of the generating set. In case of insufficient starting torque, some devices of the prior art require an external auxiliary device to initiate the rotation. On the contrary, a wind turbine device according to the invention makes it possible, by meshing a plurality of wind turbine shafts on the same input shaft, to provide a higher starting torque to each of the pairs of each of the wind turbines, without however, require the use of oversized blades, or external devices to help rotation.

A wind device according to the invention may comprise a single input shaft which coincides with the motor shaft. In a variant, a wind turbine device may comprise a plurality of input shafts, the latter all of them driving the same intermediate shaft separate from the motor shaft. According to another variant, a device according to the invention may comprise one or more shafts driven by one or more intermediate shafts and adapted to drive the motor shaft. The transmission of a wind turbine device according to the invention is not limited in the number of trees and in the type of arrangement between the shafts.

The couplings between the shafts can be made by any means known per se. They may in particular be made by gears, such as pinion gears, in particular spur gears, helical gears, etc. They can also be made by bevel gears, hypoid, cylindrical, herringbone, screw, etc., or by gear trains, such as epicyclic gear trains, spherical trains, etc.

Couplings between shafts can also be made by belts, magnetic contacts, hydraulic devices, etc.

Advantageously and according to the invention, at least one pinion, said driven pinion, is mounted on at least one input shaft of said transmission and at least two pinions, said driving pinions, are respectively mounted on two wind turbine shafts, said driving gears being adapted to be coupled to said driven gear, so that these wind turbines can drive this input shaft in rotation. Commonly, the driving gears and the driven gear are chosen to have an identical pitch, a necessary condition to allow meshing.

Moreover, each pinion driving a wind turbine shaft may have a number of teeth identical to the number of teeth of the driven pinion of the input shaft to which it is geared, so that the speed of rotation of the input shaft is the same as the speed of this windmill shaft. The drive gear of a wind turbine shaft may also include a number of teeth smaller than or greater than the number of teeth of the driven gear such that the speed of the output shaft is respectively less than or greater than the rotational speed of the output shaft. this Petolienne tree. The gears of the wind turbine shafts meshing on the same output shaft may have an identical or different number of teeth.

Nevertheless, advantageously and according to the invention, at least two driving gears of at least two wind turbine shafts comprise a number of different teeth.

Such a gear system offers a wide range of use of the wind turbine device. In particular, two wind turbines comprising driving gears with a number of different teeth geared to the same driven gear of an input shaft, allow a progressive start of the wind turbine device. In low wind, the wind turbine associated with the gear pinion comprising the largest number of teeth, called wind turbine starter, will impose its rotation speed to the input shaft. On the other hand, when the wind increases, the wind turbine associated with the gear pinion comprising a smaller number of teeth imposes its speed on the input shaft. The starting turbine will then partially brake the input shaft, which not only provides a device according to the invention a gradual start, but also provides a guarantee against a risk of runaway wind device.

A wind turbine device according to the invention may comprise a plurality of wind turbines comprising a different number of teeth, so that the wind turbine can be started in such a way that progressive.

Advantageously, a device according to the invention can be equipped with freewheels whose function is to limit, if necessary, the braking effects of the wind turbines associated with the gears forming transmission ratios with the driven gear less than 1.

Alternatively or in combination, the transmission comprises belt and / or chain couplings.

Alternatively or in combination, the transmission comprises hydraulic couplings. . A wind group according to the invention comprises at least two wind turbines with non-coaxial shafts.

Nevertheless, advantageously and according to the invention, the wind group comprises at least fifty wind turbines, including two hundred wind turbines. • All wind turbines can be non-coaxial or just some of them.

Advantageously, a wind turbine according to the invention comprises blades arranged around the shaft of this wind turbine. A wind turbine according to the invention may comprise one, two, three, four, five or more blades. These blades can be made of any type of material, including plastic, wood, fiberglass, carbon fiber, etc., and have all types of dimensions.

Nevertheless, advantageously and according to the invention, each wind turbine comprises at least two blades arranged around its shaft and adapted to drive the shaft in rotation by the action of the wind, said blades having lengths of less than 30 cm, in particular of the order of 10 cm.

A wind turbine according to the invention having blades of less than 30 cm in length, in particular of the order of 10 cm, is very economical to manufacture. Such a wind turbine will advantageously be made of recyclable plastic, so that a device according to the invention not only has an advantageous manufacturing cost, but also constitutes a ecological device.

A wind turbine of a wind turbine device according to the invention may also consist of a wind turbine microsystem, in particular with a vertical axis, so as to be able to drive its shaft in rotation in particular by a surface wind. Such a microsystem has micro-blades having a length of less than 1 cm, especially less than 1 mm. A wind turbine device equipped with a plurality of such micro-wind turbines makes it possible to constitute a source of energy adapted in particular to the supply of an electronic device. It is therefore conceivable to associate a wind turbine device according to the invention with each device requiring a power supply, such as a household appliance, a television, a telephone, etc.

A wind device according to the invention is not only suitable for feeding a given apparatus, but also for feeding a dwelling or a residential group. To do this particular, ^• a wind power device according to the invention advantageously comprises a large number of small wind turbines with blades of a length of the order of 10 cm. These wind turbines being non-coaxial, they can be arranged so that their axes are in the wind direction, and remain in the wind direction, for example by a known wind vane system. Therefore, the area of the equivalent surface swept by all the wind turbines is substantially equal to the sum of the areas of the surfaces swept by each wind turbine. Therefore, a wind turbine device according to the invention makes it possible to achieve performances substantially equal to a single large-blade wind turbine sweeping a surface substantially equal to the equivalent surface swept by all the wind turbines.

In case of failure of one of the wind turbines, it is very easy and very economical to replace it. Furthermore, a device according to the invention can continue to operate, even in the event of failure of one of the wind turbines. Advantageously, a wind turbine device according to the invention comprises at least two hundred wind turbines, each wind turbine having at least two blades of 10 cm in length, so that the area of the surface swept by. each wind turbine is, in square meters, of the order of O.Olπ, said device being adapted to produce of the order of 0.01 kW per square meter of surface in the presence of a wind of the order of 15 km / h. The invention further relates to a wind power device for producing electrical energy characterized in combination by all or some of the characteristics mentioned above or below.

Other characteristics, objects and advantages of the invention will become apparent on reading the following description which, by way of nonlimiting example, presents embodiments of the invention, with reference to the appended drawings; in these drawings:

- Figure 1 is a schematic sectional view of a wind power device for producing electrical energy according to one embodiment of the invention, - Figure 2 is a schematic perspective view of a wind device according to another mode embodiment of the invention,

- Figure 3 is a schematic perspective view of a wind device according to an embodiment of the invention mounted on a dwelling. In the figures, the proportions between the different organs and the scales are not respected for the sake of clarity.

FIG. 1 presents a wind turbine device comprising a group 1 generator of electrical energy, a group 3 wind and a transmission

2 arranged between the wind group 3 and the generator group 1, so as to be able to transmit a mechanical energy produced by the group 3 wind to group 1 generator of electrical energy.

According to the embodiment of FIG. 1, the wind turbine group 3 comprises two axial air turbines, called wind turbines 4. An axial air turbine is a rotary device adapted to receive the force of the wind and convert it into a mechanical energy which is translates as the rotation of a tree, this tree to be located as much as possible in the axis of the flow of air. According to other embodiments, the wind turbines may be vertical-axis air turbines, in particular of the Savonius or Darrieus type.

According to the embodiment of the figures, each wind turbine 4 comprises a shaft 5 around which blades 6 are arranged. The shafts 5 of the two wind turbines 4 are non-coaxial. These shafts 5 are, according to the advantageous embodiments shown in the figures, parallel to each other. According to other embodiments, these shafts 5 may be non-parallel, for example, for wind turbines not equipped with a wind vane system and whose wind from the installation region of this wind turbine device repeatedly blows into one or several privileged directions; a first group of wind turbines can then be arranged so that the trees of these wind turbines are in the axis of one of the preferred directions, and a second group of wind turbines can be arranged so that the trees these wind turbines are in the axis of the other preferred direction. Wind turbines 4 can be of any type known per se.

The shaft 5 of each wind turbine is coupled to a shaft, said input shaft 7, of the transmission 2. According to the embodiment of FIG. 1, this coupling is produced by means of a gear system. To do this, the shaft 5 of each wind turbine comprises a pinion 8 arranged at the end of the shaft 5, opposite the blades 6. These pinions 8 are meshing in a driven gear, said toothed wheel 9. These pinions 8 and 9 toothed wheel are selected so that the induced transmission ratio is consistent with the desired use and preferably meets the standards in force. For example, the numbers of teeth are preferably chosen first between them so that each tooth of each pinion 8 meets each tooth of the toothed wheel 9. Preferably, the toothed wheel 9 has a number of teeth greater than the number of teeth of each pinion 8, so that the input shaft 7 is rotated at a speed less than the speed of rotation of each of the teeth. wind turbines 4 and that the torque of the input shaft 7 is greater than the torque of each of the wind turbines 4. The input shafts 7 can be considered as slow trees of the wind turbine device. The input shaft 7 of the transmission 2 is coupled to a transmission 2. This transmission 2 may comprise several shafts and several coupling devices so as to modify the torque and / or the speed of rotation. Preferably, the transmission ratio of this transmission 2 is chosen so that the speed of rotation at the output of the transmission 2 is greater than the rotational speed of the input shaft 7. In this way, a motor shaft coupled to the transmission 2 may have a high rotational speed suitable for generating a large amount of electrical energy. The motor shaft can thus be considered as the fast shaft of the wind turbine device. This transmission 2 is known and is not described in detail According to one embodiment of the invention, this transmission 2 is a direct transmission 2 between the input shaft 7 and the output shaft.

The output shaft 10 is associated with the group 1 generator of electrical energy. According to one embodiment of the invention, the generator group 1 comprises a single rotating electrical machine, which makes it possible to reduce substantially the costs of a wind turbine device according to the invention. This electric machine comprises, according to the embodiment of Figure 1, a rotor 13 and a stator 14 adapted to allow the generation of electrical energy by the rotation of the rotor 13 relative to the stator 14. This rotor 13 can be directly arranged on the output shaft. This electric machine may be, in known manner, a permanent magnet alternator, a direct current generator or a brushless alternator.

The various shafts of the wind turbine device according to the invention are conventionally mounted on bearings. The bearings of the transmission are preferably arranged inside a housing, not shown in the figures.

2 shows another embodiment of the invention comprising a plurality of non-coaxial windmills with each ^'other. In this figure, a non-limiting embodiment of the transmission between the wind generator group and the generator set has been shown. In this figure, each input shaft 7 is rotated by three wind turbines 4. According to other embodiments, an input shaft 7 can be rotated by more than three wind turbines and each input shaft 7 is not necessarily rotated by an equal number of wind turbines 4. In addition, a wind turbine 4 may comprise more than one blade wheel 6 arranged on its shaft 5.

According to the embodiment of Figure 2, each input shaft 7 is in turn coupled to a shaft, said first shaft 11 intermediate. Each first intermediate shaft 11 is coupled to another shaft, said second shaft 12 intermediate. Each second intermediate shaft 12 is coupled to the output shaft. Of course, according to other embodiments, the transmission may comprise a different number of intermediate shafts.

The couplings between the different shafts can be made by gear systems according to the principle of Figure 1. According to other embodiments, these couplings are bevel gear couplings, hypoid, cylindrical, herringbone, screw, etc. ., or gear trains, such as planetary gear trains, spherical trains, etc.

In other embodiments, these couplings are belt couplings, hydraulic couplings, magnetic couplings, and so on.

Figure 2 shows by way of example, a belt coupling between each second intermediate shaft 12 and the motor shaft. These couplings are known per se and are not described in detail.

A wind device according to the invention is particularly intended and adapted to the generation of electrical energy for an individual dwelling. Also, so as to limit in particular the aerodynamic noise resulting from the rotation of the wind turbines, a wind turbine device comprises small blades, the aerodynamic noise generated being proportional, at constant wind speed, to the length of the blades of the wind turbine. To do this, each wind turbine 4 according to the invention preferably comprises blades of less than 30 cm in length, in particular the order of 10 cm in length, and less than 10 cm in width, in particular of the order of 5 cm. The area of the surface swept by the blades 6 is therefore preferably less than 0.78 square meters, in particular of the order of 0.03 square meters. The blades 6 of the wind turbine are preferably plastic blades, including injection-molded plastic blades, so as to minimize manufacturing costs. According to other embodiments, these blades 6 can be made of another material, in particular wood, fiberglass, carbon fiber, etc. According to the embodiment of the figures, each wind turbine 4 comprises three blades 6 arranged around the shaft

5 of the wind turbine 4. According to other embodiments, the wind turbines 4 may comprise a lower or higher number of blades, the number of blades determining the starting torque of a conventional wind turbine with horizontal axis blades. According to the embodiment of the invention in which the wind turbines scan surfaces of the order of 0.03 square meters, a wind device comprising two hundred wind turbines covers an equivalent area of

6 meters squared and can deliver, under a wind of 25 km / h, a power of 297 W. If the blades have lengths of 20 cm, the area of the equivalent swept surface is 25 square meters and the power delivered under a wind speed of 25 km / h is 1.16 kW. It therefore appears that the energy potential of a wind turbine device according to this embodiment is identical to a single wind turbine whose blades have a length of 2.82 meters. The realization of such a wind turbine proves in practice much more complex than the realization of a device according to the invention. Moreover, in case of failure of one of the wind turbines of a device according to the invention, the wind turbine device can continue to produce energy, whereas a single equivalent wind turbine can not afford a failure, under pain to interrupt the production of energy.

Figure 3 shows a possible use of a wind device according to one embodiment of the invention. ^•

In Figure 3, a dwelling 15 has a roof of 25 square meters of surface on which is arranged a wind device according to one embodiment of the invention comprising two hundred wind turbines 4 (not all shown in Figure 3 for the sake of clarity), each wind turbine 4 comprising blades of 20 cm of length. Therefore, under an average wind of 25 km / h, such a device can deliver a power of 1.16 kW. If you consider an area of 100 square meters, it is possible to arrange eight hundred wind turbines, each with blades of 20 cm in length. In this configuration, a device according to the invention is capable of generating a power of 5 kW under a wind of 25 km / h and a power of 70 kW under a wind of 60 km / h. According to one embodiment, a device according to the invention comprises at least two hundred wind turbines, in particular four hundred wind turbines, each wind turbine having at least two blades 6 of 10 cm in length, so that the area of the surface swept by each wind turbine 4 is of the order of 0.0 lπ square meters, said device then being adapted to produce at least 0.310 kW, in particular 0.621 kW, in the presence of an average wind of 25 km / h.

According to the embodiment of FIG. 3, the generator group comprises a single generator. According to other embodiments, the generating unit may comprise several generatrices, for example a generatrix arranged at the end of each of the three rails 16, each rail 16 being rotated by a plurality of wind turbines 4.

The invention is not limited to the embodiments described. In particular, a wind turbine device according to the invention may have various configurations and may comprise wind turbines of different sizes and unspecified couplings between the different shafts of the different wind turbines.

A wind turbine device according to the invention may also comprise non-axial wind turbines of the anemometer or other type.

A wind turbine device according to the invention makes it possible to provide a reasonable power for domestic applications and appears to be appropriate for an additional energy supply. . A wind device according to the invention is advantageously associated with a solar device for generating electrical energy. In particular, a wind turbine device according to the invention is advantageously associated with an accumulator, this accumulator is preferably rechargeable by the wind turbine device and by an associated solar device.

A wind device according to the invention is a device for generating a clean and renewable energy.

Furthermore, a wind turbine device according to the invention is economical, low noise, and can, as such, be located in urban and peri-urban areas.

Claims

1 / - A wind power device for producing electrical energy comprising: a group (1) generating electrical energy adapted to generate an electrical energy by a conversion of a mechanical energy into this electrical energy, - a group (3) wind adapted to capture wind energy and convert it into mechanical energy, a transmission (2) arranged between said wind group (3) and said generator group (1), said transmission (2) being adapted to transmit a mechanical energy produced by said wind generator group (3) to said generator group (1), characterized in that said group (3) wind turbine comprises at least two air turbines, called wind turbines (4), comprising non-coaxial shafts (5) coupled to said transmission (2) and arranged so that said wind turbines (4) can present a wind surface, said equivalent area, greater than the wind surface of each of the wind turbines (4). 21- Device according to claim 1, characterized in that said group (3) wind turbine comprises at least two wind turbines (4) axial, comprising non-coaxial shafts (5) coupled to said transmission (2) and arranged so that said wind turbines (4) may have a wind surface, referred to as the equivalent area, greater than the wind area of each of the wind turbines (4). 31- Device according to one of claims 1 or 2, characterized in that said transmission (2) comprises at least one shaft, said shaft (10) motor, coupled to said group (1) generator, and at least one shaft, said input shaft (7), coupled to said wind generator (3), said input shaft (7) being rotated by at least two non-coaxial shaft wind turbines (4) of said wind group (3). Al-Device according to one of claims 1 to 3, characterized in that said transmission (2) comprises couplings by sprockets. 5 / - Device according to claims 3 and 4 taken together, characterized in that at least one pinion, said pinion (9) led, is mounted on at least one input shaft (7) of said transmission (2) and in that at least two pinions, said pinions (8) driving, are respectively mounted on two shafts (5) of wind turbines, said pinions (8) driving being adapted to be coupled to said pinion (9) driven, so that these wind turbines (4) can drive this shaft (7) to enter rotation. 6 / - Device according to claim 5, characterized in that at least two gears (8) leading to at least two shafts (5) wind turbines comprise a different number of teeth. Il- device according to one of claims 1 to 6, characterized in that said transmission (2) comprises belt couplings. 8 / - Device according to one of claims 1 to 7, characterized in that said transmission (2) comprises hydraulic couplings. 91- Device according to one of claims 1 to 8, characterized in that said group (3) comprises wind turbines (4) trees (5) non-coaxial and wind turbines with coaxial shafts. 10 / - Device according to one of claims 1 to 9, characterized in that each wind turbine (4) comprises at least two blades (6) arranged around its shaft (5) and adapted to drive the shaft (5) in rotation by the action of the wind, said blades (6) having lengths less than 30 cm, in particular of the order of 10 cm. 11 / - Device according to one of claims 1 to 10, characterized in that said group (3) wind comprises at least one hundred wind turbines (4), in particular of the order of two hundred wind turbines (4). 12 / - Device according to one of claims 1 to 11, characterized in that said generator group (1) comprises a single generator. 13 / - Device according to one of claims 1 to 12, characterized in that it comprises at least two hundred wind turbines (4), including four hundred wind turbines (4), each wind turbine having at least two blades (6) of 10 cm in length, so that the area of the surface swept by each wind turbine (4) is of the order of 0.0 lπ square meters, said device then being adapted to produce at least 0.310 kW, in particular 0.621 kW, in the presence an average wind of 25 km / h.