RO135399A2 - Wind turbine - Google Patents

Abstract

The invention relates to a wind turbine with horizontal axis meant to produce electric power for both the national power system and for domestic or isolated consumers, at low or medium wind velocity. According to the invention, the turbine comprises an assembly consisting of a deflector (1) which has the shape of a spherical segment, a confusor (2) with a flange, having the shape of a spherical segment of flange positioned at the back part of the confusor (2) in connection with which two counter-rotating propellers (9 and 11), a front one and a back one, respectively, are mounted, each on the shaft of an alternator (6 and 10), components which are mounted by means of a support (12) and of some profiled ribs (5), on a supporting string course (13) which is placed, in its turn, on a supporting pillar (14).

Description

WIND TURBINE

STATE OFFICE FOR INVENTIONS AND MARKET Patent Application

Nr.

Deposit date

The invention relates to a wind turbine with a high-efficiency horizontal axis of rotation, consisting of two counter-rotating coaxial propellers, two alternators, a deflector, a flange mixer, the wind installation is capable of providing greater efficiency in extracting energy from a fluid, intended to be used for the production of electricity both in the national energy system but also for domestic or isolated consumers, in conditions of low or medium wind speeds.

The wind turbine is designed to capture, divert and direct the airflow that moves the propellers of the wind turbine, with the role of converting the kinetic energy of the wind into mechanical energy of rotation.

The efficiency performance expressed in coefficient of power (Cp) according to the Betz limit is durable and significantly higher than a conventional single-turbine wind turbine of comparable diameter.

There are two known types of horizontal axis wind turbines with two counter-rotating coaxial propellers either mounted upstream, for the situation when the wind blows on the surface of the propeller blades, in the direction of the wind turbine or with a propeller mounted either upstream and downstream, for situations when the wind blows on the back of the blades, compared to the body of the wind turbine.

These counter-rotating coaxial propellers, which consist of blades arranged radially in a vertical plane, perpendicular to the gripping axis and the wind direction, have a relatively small active surface compared to the blade span, and the torque of the shaft is small, due to the shape construction of the blades.

There are known wind installations with deflector deflection, concentration and acceleration of air flow, which move the blades of a wind propeller, deflector consisting of various screens in the air intake area and which directs the air only to one area of the blades.

Also known are wind turbines that have airflow directional blowers to the blades of the wind turbine propeller, blowers consisting of outer walls mounted at the entrance of the wind turbines, in the shape of a cone.

Wind turbines are known, consisting of a different number of blades arranged radially in a vertical plane, perpendicular to the axis of attachment and the direction of the wind; they have a relatively small active surface compared to the span of the blades, and the torque of the shaft is small, a phenomenon due to the constructive shape of the blades.

The diameter of a propeller is directly related to the theoretical power of the wind, as shown in the report on page 15 of the publication "HOW TO BUILD A WIND TURBINE", technological guide for the design and construction of wind turbines, Pitesti, ARTEMIS Publishing House, 2019.

There are also various wind turbines mounted on supports with the possibility of orienting the blades of some propellers in the direction of the wind, to which the airflow is directed by means of deflectors, but these installations have the disadvantage that they do not achieve a maximum concentration of air to the wind turbine propeller.

The patent literature is relatively extensive in describing solutions aimed at horizontal-axis wind turbines with two counter-rotating propellers, solutions featuring wind turbines equipped with deflectors for deflection, concentration and acceleration of airflow, some confusing direction of flow. There is also another type of wind turbine that has a flange diffuser designed to accelerate the flow of wind as it enters the wind turbine as an attempt to be more energy efficient. electric and less invasive for both humans and nature.

in the patent no. RO 122051B1 shows a wind turbine with low intensity wind, used in wind turbines, its blades being characterized by a certain spatial configuration, based on some angular values in order to create microturbulences that increase the load-bearing force of the blades.

in the patent no. RO 122502B1 presents a solution comprising a wind turbine with double inclined blades and an outer bandage, which have the role of converting wind energy into mechanical rotating energy.

An interesting solution regarding the creation of an intentional obstacle for the concentration of wind energy is presented in the patent no. RO 122738B1, according to which the concentration of wind energy is carried out by means of a space module, inside which is located a network of support beams, connected to some support elements, which are placed on a steering and support device, provided with two rack-type mechanisms for orienting and maneuvering the space module, respectively.

Patent no. The purpose of the RO 122739B1 is a concentrator collector for a wind turbine that uses it, the concentrator collector capturing a moving amount of fluid and directing it to the area of use.

in the patent no. US 4482290A shows a wind power amplification solution using a diffuser that captures airflow and directs it to the blades of a wind turbine.

A solution for capturing the air mass generated by the wind by means of a deflector is presented in patent no. US 4278896A, in which there are a multitude of wind turbines that drive an electric generator.

in patent no. US 6717285B2 discloses a wind turbine composed of several tubular wind energy collectors that direct the moving air mass at the base of a hyperboloid, in which a vertical shaft wind turbine driven by an ascending air current is located.

A wind turbine with two rotors which is the subject of patent no. US 6945747B1 consists of two coaxial propellers of different sizes, each of which drives an electric generator.

A wind generator system, based on a battery of several devices for capturing wind energy, with the role of concentrating it to the wind turbine is presented in patent no. US 6932561B2.

A wind turbine, which comprises two counter-rotating propellers, of different geometric and aerodynamic configurations, which drives the electric generator by a planetary type mechanism, is presented in the patent no. US 7384239B2.

The literature on patents is relatively extensive in solutions aimed at wind turbine rotors.

The invention patent RO 125465A2 discloses a wind rotor made in the form of a hub-spoke-beam assembly necessary to obtain an electrical power comparable to that required for a dwelling.

U.S. Pat. No. 7,198,471B2 discloses a method of manufacturing a wind turbine blade comprising prefabricated strips made of carbon fiber and arranged on the outside.

U.S. Pat. No. 4,714,852B2 discloses a model of a wind turbine blade that has an aerodynamic shape with the front surface facing the wind direction and the back with an orientation in a downwind direction, the blade profile is characterized by an angle ratio between base and peak of about 4%.

Known wind turbine rotors with a different number of blades have the disadvantage that they are structurally complicated and have a low efficiency at low wind speeds.

Also known are wind turbines that have airflow directional blowers to the blades of the wind turbine propeller, blowers consisting of outer walls mounted at the entrance of the wind turbines, in the shape of a cone.

in patent no. WO 2012143734A1 shows an outer ring, consisting of three speakers, around two counter-rotating propellers, which pull the wind even further through the turbine and increase the power of the wind turbine.

Another object of the turbine according to the claimed invention is that the horizontal axis wind turbine consists of a fairing subassembly which in turn consists of a deflector and a flanged confusing which by the ingenious manner of assembly between them, one after the other, makes a new important component, namely flange baffle, all components are made of lightweight materials, the two counter-rotating propellers each move a wind alternator at a power depending on the diameter of the propellers and wind speed, with a specific speed, the electricity produced is used for industrial and domestic purposes.

U.S. Pat. Nos. 20110042952A1 and US Pat. No. 2,600,0000,662 are shown an outer ring around the wind turbine propeller, which is actually a fairing, or a diffuser that can create a low pressure zone, which blows even more through the turbine and triples. the power.

in patent no. WO 2010090543A3 shows an outer ring around two counter-rotating propellers, which pull the wind even further through the turbine and increase the power of the wind turbine.

All of these inventions are in fact applications of the inner Coanda effect with all known implications.

These deflectors and jammers have the disadvantage that they do not deviate, concentrate and accelerate the maximum flow of air to move the propeller blades of the wind turbine.

These self-known solutions generally have the disadvantage of a relatively low efficiency of converting wind energy into electricity, as they generally use a single propeller, which leads to the use of a relatively large number of installations to achieve a certain power threshold.

The technical problem solved by the wind turbine, according to the invention, is to increase the efficiency of converting wind energy into electricity, at low and average wind speeds below the threshold of 4 m / s.

The wind turbine, according to the invention, removes the disadvantages shown above by the fact that it consists of a subassembly of collection, deflection, concentration and acceleration of the fluid current, according to the Coandă effect in relation to which are placed some counter-rotating propellers with aerodynamic profile. Geometrically shaped, they are relatively close to a Gothic delta wing with rounded edges, so that the wind that attacks the aerodynamically profiled blades creates the load-bearing effect on the extrados of the profile, each mounted on the axis of an alternator. the fluid stream consisting of a deflector and a flanged confusing having rounded front surfaces, the deflector and flanged confusing being mounted by means of support elements which in turn are mounted on a wind turbine support pillar so that the flow of air that moves the rear propeller es composed of 3040% of the airflow passing between the blades of the first propeller cumulated with the airflow of 60 ^ 70% deflected to the outside by the deflector and the flange confused which represents the subassembly of collection, deflection, concentration and acceleration of the current fluid, all these components direct, channel and increase airflow, accelerating airflow as it enters the turbine, increasing efficiency and reducing noise considerably.

The object of this invention is to provide a wind turbine with a horizontal axis of rotation which, together with two counter-rotating propellers set in motion by an alternator, also comprises a deflector and a flanged confuser, components necessary to increase the air supply by deflection of the fluid, according to the Coandă effect, respectively by deflection of fluid jets near the curved surfaces in the initial flow direction, as well as directing the air flow to the wind propeller blades through a flange confusing is constant.

The positioning of the flange by positioning the flange at the rear creates vortices that cause a low pressure zone to form behind the flange confused, the wind then flows into the low pressure area between the wind turbine blades so that increased airflow passes through the wind turbine propellers. leads to an increase in electricity production.

The design of the baffle and the flange diffuser allows a substantial supply of air, so that the baffle deflects the air through the shape of the curved outer surfaces and the flange baffle serves to direct the continuous, progressive reduction of the air passage section with a constant flow. to the rear propeller of the wind turbine, while the flange positioned behind the blower is designed to create a low pressure zone and accelerates the flow of air as it enters the wind turbine.

In order to increase the amount of air that will move the second propeller, it can be used together with the flow of air passing through the first propeller whose maximum speed is V / 3 and the air passing through the deflector-flange confectioner assembly, which adds twice the air intake behind the first propeller by deflecting the fluid according to the outer and inner Coand effect, or by deflecting fluid jets near the curved surfaces in the initial direction of air flow, as well as directing the fluid air to the blades of the second propeller through the flange confused, the flow of fluid passing through the interior of the confusing being kept constant.

We can say that even the most modern wind turbines cannot capitalize on 100% of the theoretical power of the wind because the air must come out from behind the first propeller with a certain speed, the air flow cannot be completely stopped in the propeller thus keeping some of its kinetic energy. In other words, the ratio between the wind speed in front of the first propeller and behind it reaches the optimum level when the wind speed at the level of the first propeller is reduced by 2/3, so the speed behind the first propeller is equal to 1/3 of the wind speed in front.

In other words, the air needed to set in motion the two counter-rotating propellers, for the purpose of producing electricity, consists of the flow of air that sets in motion the first propeller cumulated with the flow of air passing between the blades of the first propeller cumulated with the deflected air. the second propeller, on the outside of the deflector and inside the confusing by the Coanda effect, to which is added the increase in air velocity through the vortex created by the confusing flange which is designed to accelerate the flow of air as it enters the wind turbine.

With regard to the vortex, if the surface is not too curved, the jet of fluid can adhere to the surface even after flowing on a curved cylindrical surface (the flange confusing) and therefore move in a direction opposite to its original direction. The forces that cause these changes in the direction of air flow determine an equal and opposite force on the surface along which the fluid flows.

The vortex that forms is a vortex with air entrainment, which occurs when the air in the nozzle is sucked in, and the flange positioned on the outer surface at the rear of the confuser, at the point where the fluid jet begins to flow on that surface improves the deviation. The initial flow direction of the air jet and the subsequent adhesion to the surface, this results from the fact that a low pressure vortex is formed behind the flange, favoring the inclination of the jet towards the surface.

The wind turbine, according to the invention, operates according to the indoor and outdoor Coanda effect, the basic principle consists of two conversion processes performed by the main components, namely counter-rotating propellers which extract the kinetic energy of the wind and convert it into mechanical torque and in electricity and deliver it to consumers, everything is coupled with an increase in air speed through the vortex created by the flange of the confusing which has the role of accelerating the flow of air as it enters the wind turbine.

The components of the wind turbine according to the invention, the deflector, the flange mixer and the propellers, allow the realization of modular configurations which can be made of removable elements, of materials such as epoxy resin with glass fiber or carbon fiber, aluminum sheet, composite materials, plastics, reinforced fiberglass, outer surfaces and inner surfaces shall have a roughness of 0,40,6 pm ensuring a low coefficient of friction in contact with the fluid jet.

The aerodynamic shapes of the wind turbine propeller blade profile according to the invention can be of type NACA 44 or CK220, profiles obtained by gluing two cavities in the mirror, removable components can be made of carbon fiber, the inside of the cavities can be individually reinforced by a very flexible and resistant honeycomb system, ensuring aerodynamic efficiency and a reduction in mechanical stress, respectively, prolonging the life of the wind turbine propeller and reducing maintenance costs.

The substantial increase in the efficiency of the conversion of electricity into mechanical energy at the axles essentially also leads to an increase in the efficiency of electricity production through the electrical alternators related to the two propellers of the wind turbine, obtaining 300000% more electricity than in the case a classic single-propeller wind turbine with a comparable diameter.

The wind turbine with two counter-rotating propellers, with deflector and flange confused according to the invention, has the following advantages:

- ensures a similar operating regime to each of the two propellers, which leads to a conversion efficiency 300000% higher than that of a wind turbine, with a single propeller, of comparable diameter;

- simple and reliable construction;

- easy maintenance;

- allows a relatively simple replacement, in a short time, of the components;

&

- the deflector and the flange confiscator ensure a more efficient operation of the wind propellers by increasing the pressure of the air current;

- the deflector and the flange configurator serve to change the initial direction of air flow, increasing the air flow, on the outside;

- the deflector and the flange confiscator allow an efficient use of the kinetic energy of a larger amount of air, being possible the realization of wind installations in a very wide range of powers;

- wind installations equipped with flange deflector-jammer are operational at low wind speeds of 2.5 = 3 m / s, well below the permissible limits of current wind installations, obtaining an increased torque at the propeller shafts;

- the deflector and the flange confiscator serve for the continuous and progressive directing and reduction of the air passage section, in which the flow is kept constant;

- can operate for various types of wind propellers that can have a different number of blades, from 6 blades for one propeller;

- propellers have a high torque obtained at the axis of rotation for low wind speeds;

- larger active area at the same span of the blades;

- improved conversion of kinetic wind energy into mechanical mechanical rotational energy;

- propellers have an increased load-bearing force due to the aerodynamic shape of the blade profile;

- propellers have a maximum conversion efficiency;

- propellers have low noise and vibration;

- low execution, transport, installation and maintenance costs.

An embodiment of the invention is given below in connection with Figures U4, which represent:

- fig.1., visualization of the air fluid flow inside and outside the wind turbine

- fig.2., wind turbine assembly

- fig.2.a., rear view of the wind turbine

- fig.2.b., turbine cross section

- fig.2.c., isometric isometric representation of wind turbine

- fig.3., deflector

- fig.3.a., deflector cross section

- fig.3.b., isometric axometric representation of the deflector

- fig.4., confusing with flange

- fig.4.a., confusing cross section with flange

- fig.4.b., confusing isometric axonometric representation with flange

- fig.5., propeller

- fig.5.a., front view of the propeller

- fig.5.b., see propeller profile

- fig.5.c., isometric isometric representation of the propeller.

The wind turbine, according to the invention, consists of a subassembly consisting of a deflector 1 (fig.3) which has the role of deflection, concentration and acceleration of air flow and a confusing with flange 2 (fig.4) consisting of the confusing 3 which has the role of directing the air flow towards the blades of the wind turbine propeller and the flange 4 which creates the vortex (fig.l) and thus accelerates the wind flow as it enters the wind turbine, in connection with which two counter-rotating propellers are mounted 9 and rear 11 respectively (fig.5), having the elastic blades 7 inclined at an angle a with values between 5 ° and 30 °, mounted on a propeller hub 8 which in turn is mounted on the axis of the alternator 6 of the respective front propeller on the shaft of the alternator 10 of the rear propeller, alternators that operate independently, both in terms of rotational motion and in terms of electromagnetic, the propellers are stiffened inside the deflector by means of a support bracket black 12 and the flange confused is stiffened by the deflector by means of profiled ribs 5, all these components (fig.2) are stiffened by a support band 13 which is supported in a rotational motion depending on the wind direction by a support pillar 14, which also has the role of allowing access for the operation and execution of maintenance operations for the wind turbine.

The propellers of the wind turbine with low and medium intensity, according to the invention, the front propeller 9 is counter-rotating to the rear propeller 11, have a propeller diameter De, chosen according to the power of the wind turbine, on which are mounted blades 7, inclined at an angle with values between 5 ° and 30 °, the elastic blades are mounted on a propeller hub 8 which in turn is mounted on the axis of the alternator 6 of the front propeller respectively on the axis of the alternator 10 of the rear propeller.

The blades of this type of propeller have a relatively close shape with a Gothic delta wing with rounded edges, De / 3 radii, lengths less than 0.75'D _E , with semicircular extremities with De / 40 radii, a large bearing surface both outside and inside the propeller, this bearing surface has the effect of creating a shaft torque 2.5 ^ 3 times larger than a conventional wind turbine with a single propeller, of comparable diameter; the bearing surface of the blades can be increased or decreased by changing the angle of the blade width from 10 ° to 60 °.

The shape of the blades in cross section is asymmetrical, so that the air flowing due to the rotational movement of the blades tends to first reach the thickened front area of the blades which are geometrically relatively close to a Gothic delta wing with rounded edges. the particular shape of the blade profile, the dynamic air pressure produces two different effects on the blades, on the one hand, the blade will be subjected to an action that will tend to buckle (bend) the blade towards the pillar, and on the other hand, the blade will be subjected a motor action, which tends to rotate the blade (propeller), thus producing the lifting phenomenon.

During operation, the force of the wind will rotate each blade 7 due to the angle a, the wind being deflected due to the aerodynamic shape of the profile, both its surfaces, top extrados and bottom respectively - intrados contributes to the return of flow, thus creating a depression behind the blades, and the resulting moment at the propeller shaft increases.

Deflector 1 is a subassembly in the shape of a spherical segment with two bases, with rounded front edges, serves to produce deflection, is used to change the initial direction of wind flow, being an application of the Coanda effect resulting from deflection of fluid jets nearby curved surfaces.

The wind turbine propellers have blades with an aerodynamic design of an identical shape in the mirror, have a rotational movement in a parallel plane for simultaneous counter-rotating operation, the rotational movement is performed by two electric alternators 6 and 10, these components are mounted inside of the deflector by means of a support 12, all these components are stiffened by a support band 13, the wind turbine is supported in a rotational motion depending on the wind direction by a support pillar 14 which also has the role of allowing access to view of the operation and execution of maintenance operations for the wind turbine.

Flange 2 is a subassembly in the shape of a spherical segment with two bases, consisting of 3 which has the role of directing the air flow to the blades of the wind turbine propeller and the flange 4 which creates the vortex and thus accelerates the flow of wind as it enters. In the wind turbine, with a larger diameter than the deflector, it is mounted by means of profiled ribs 5 on the outside of the deflector at the rear and serves to continuously, progressively reduce the passage section of a fluid in which the flow is kept constant.

Accelerating the wind flow as it enters the confuser can also be achieved by building transverse profiled slots on the surface of the confuser, which make the air communicate between the outer area of the confuser and its inner area, as soon as the airflow passes through the outer surface. of the confusing the profiled slots are immediately connected to the energy source of the fluid, inside them a zone of depression is generated and thus a secondary, entrained flow of air appears.

Deflector 1, which is used to produce deflection, is used to change the initial direction of air flow, being an application of the Coandă effect, which consists in deflecting fluid jets near curved surfaces.

The connection between the diameter D _d of the deflector 1 and the diameter D _E of the propellers 9 and 11 is given by the relation:

Dd = (1.04-1.14) -D _and (1)

The confusing flange 2 which is mounted by means of profiled ribs 5 on the outside of the deflector 1, consists of the confusing 3 which has the role of directing the air flow to the blades of the wind turbine propeller and serves to continuously, progressively reduce the flow section of the wind turbine. air at a constant flow and flange 4 which creates the vortex and thus accelerates the flow of wind as it enters the wind turbine.

The connection between the diameter D _d of the deflector 1 and the diameter of the flangeless confused D _c is given by the relation:

D _c = (1.4-1.8) -D _d (2)

The connection between the diameter Dcf of the confusing flange and the diameter of the confusing without flange Dc is given by the relation:

Dcf = (1,2-1,6) D _C (3)

The subassembly consisting of the deflector 1 and the flange confusing 2 can be made of epoxy resin with fiberglass or carbon fiber, aluminum sheet, composite materials or plastics, with a roughness of 0.4-1.6 pm which ensures a low coefficient of friction in contact with fluid jet.

Propeller 9 and propeller 11 have a diameter D _E in direct relation to the theoretical wind power as it results from the relation:

Pt = ϋ _Ε ² · π · ρι / 8 · ν ³ [W] (4) where:

P _t - represents the theoretical power existing in the wind, in [W] pi - air density at sea level, pi = 1.25 [kg / m ³ ]

D - diameter of the propeller, in [m]

V - wind speed, in [m / s]

Each blade 7 is made of durable and at the same time flexible materials, such as fiberglass epoxy resin, carbon fiber, aluminum sheet, composite materials or plastics, the propellers 6 and 11 are practically geometrically identical and aerodynamic but are made in the mirror.

In order to increase the amount of air, according to Fig. 1, which represents the visualization of the air fluid flow inside and outside the wind turbine, which drives the propeller 9 together with the propeller 11 set in motion by wind speed, the subassembly consisting of deflector 1 and flange confusing , which adds an air intake of 604-70% by deflecting the fluid flow, according to the Coandă effect, respectively by deflecting the fluid jets near the curved surfaces in the initial direction of flow, as well as directing the air fluid to the blades 7 of the propeller 9 through the confusing 3, the fluid flow passing through the respective section being kept constant.

As a result of the above, the flow of air that moves the propeller 11 is composed in a proportion of approx. 304-40% of the air flow passing through the blades 7 of the propeller 9 cumulated with the air flow, of approx. 60-470%, deviated on the outside by the deflector-confusing subassembly with flange by the Coanda effect.

Propellers 9 and 11 extract the kinetic energy of the wind and convert it into mechanical torque, and electric alternators 6 and 10 convert this torque into electricity and deliver it to the grid.

Electricity can be discharged into the system both separately and in a cumulative manner by means of inverters and, as the case may be, by means of that of high-voltage transformers, in order to discharge the electricity in the national energy system.

The plane of rotation of the two propellers 9 and 11 is controlled so as to be kept perpendicular to the wind direction by means of an orientation system, known in itself and the resulting air flow on the blades 7 of the wind turbine propellers produces a pressure difference between the blades exposed to the wind and the opposite, the blades of each propeller are rigidly connected to the propeller hub 8.

The propeller 9, positioned on the same imaginary axis as the propeller 11 is also driven by the additional airflow which represents 604-70% of the flow produced by deflection of subflector deflector with flange, the wind attacks the blades 7 of the propellers which being aerodynamically profiled, creates on the extrados profile bearing effect.

The force of the wind, as it passes through the deflector-confusing sub-assembly with the flange, is diminished by the blades 7 of the front propeller 9, so that in order to move the rear propeller 11, at rotational speeds close to those of the front propeller, it is necessary an additional flow of air that is produced by the deflection of fluid jets near the curved surfaces of the deflector and flange confused.

The constructional shapes of the deflector 1 and the flange confused 2 have been designed to allow additional air supply to the propeller 9, produced by deflection so that the deflector deflects the air in the form of curved outer surfaces, and the confused 3 serves to direct, continuous, progressive reduction on wind direction of the air passage section, with a constant flow to the propeller 11.

Thus the air flow passing through the propeller 9 cumulated with the deflected air flow and directed by the constructive form of the deflector 1 and that of the flanged confused 2 moves the propeller 11 at comparable rotational speeds of up to 100% of the rotational speed of in front of the propeller, the flange 4 of the confusing creates a vortex that results in a depression accelerating the flow of wind as it enters the turbine, which directly leads to an increase in the conversion efficiency of the entire wind installation by values higher by 300 ^ -400% than in the case of a classic single-propeller wind turbine, known in itself.

The deflector 1 and the flange confused 2 ensure both an increase in airflow and a change in the initial direction of air flow by increasing the air flow on the outside for the propeller 11.

The area occupied by the wind turbine according to the invention, due to the use of counter-rotating propellers 9 and 11, the deflector 1 and the flanged confusing 2, is up to twice as small as the area occupied by two wind turbines equipped with a single propeller. known, this wind turbine can be transported, assembled and disassembled relatively easily, in a relatively short time due to the modular construction made of removable elements.

The wind turbine, according to the invention, operates in such a way that at a wind speed with a value of around 9 m / s the kinetic energy of the wind determines the rotation of the propeller 9 with a rotational speed Vi, the air flow passing through the propeller 9 reaches the surface. propeller bearing 11, diminished by a maximum of three times.

Due to the deflector and flange confusing subassembly 2, the Coanda effect provides an additional air intake of 6 (K70% to the blades 7 of the propeller 11, thus the rear propeller, having a mirror configuration to the front propeller 9 will be driven in the opposite direction of rotation, with the rotational speed V2, a rotational speed which tends to be equal in value to the rotational speed Vi of the propeller 9.

BIBLIOGRAPHY

1. HOW TO BUILD A WIND TURBINE, technological guide for the design and construction of wind turbines, Pitești, Edit. ARTEMIS, 2019

2. RO 122051B1

3. RO 122502B1

4. RO 122738B1

5. RO 122739B1

6. US4482290A

7. US4278896A

8. US6717285B2

9. US 6945747B1

10. US 6932561B2

11. US 7384239B2

12. RO 122972B1

13.RO 125465A2

14.US 7198471B2

15.WO 2012143734A1

16.US 7614852B2

17.US 4482290B2

18.RO 122737B1

19.US 2137169A1

20.WO 2010090543A3

21.US 7018166B2

22.US 20120086216A1

23.US 20110042952A1

Claims (5)

demand 1. A wind turbine, characterized in that it consists of a deflector (1) which ensures both an increase in airflow and a change in the initial direction of flow of the air stream, a confusing flange (2) which acts as a directing the air flow to the blades of the wind turbine propeller and serves to continuously, progressively reduce the passage of the passage of air fluid under conditions of a constant flow creating the vortex that accelerates the flow of wind as it enters the wind turbine, according to the Coandă effect. with which are placed some propellers, front (9) and rear (11), respectively, counter-rotating, each mounted on the shaft of an alternator (6 and 10), components which are mounted, by means of a support bracket (12) and some profiled ribs (5), on a support band (13) positioned in turn on a support turbine (14) for the wind turbine. The wind turbine according to claim 1, characterized in that the diameter (Dd) of the deflector (1), the diameter (Dc) of the flange mixer (2) and the diameter (Dcf) of the flange of the confused (2) are given by the relations: D _d = (1,04-1,14) -D _e (1) which shows that the diameter (Dd) of the deflector (1) is 4-14% larger than the diameter (D _E ) of the propellers (9 and 11) the wind turbine, propellers which are mounted by means of a support bracket (12) inside the deflector and the flange confused (2); Dc - (1,8-2,2) * Dd (2) which shows that the diameter (Dc) of the confuser (3) is 80 ^ -120% larger than the diameter (Dd) of the baffle (1) and is mounted by by means of profiled ribs (5) on the outside of the baffle at the rear of the baffle; Dcf = (1, H1,5) -D _c (3) which shows that the diameter (Dcf) of the confusing flange (4) is 10 ^ 50% larger than the diameter (Dc) of the confusing (3) and the flange, which can be also a removable element, it is mounted in the rear of the confusing. Wind turbine according to Claims 1 and 2, characterized in that the propellers (9 and 11), front and rear, are counter-rotating and constructively identical, are made and mounted in the mirror and are constructed of blades ( 7) configured in a Gothic delta wing profile, with an angle a, mounted on a propeller hub (8); the front propeller (9) is located in the deflector (1), and the rear propeller (11) is located in a plane parallel to the one in which the front propeller is placed, behind the flange confused (2) by means of a support ( 12). Wind turbine according to Claims 1 to 3, characterized in that the electric alternators are positioned in front (6) and rear (10), respectively, placed back to back in relation to each other, operating counter-rotatingly and independently electromagnetically, energy electricity can be charged in the system, both separately and in a cumulative mode by means of inverters and, as the case may be, by means of that of voltage transformers in order to discharge the electric current in the national energy system; the blades (7) are relatively close in shape with a rounded Gothic delta wing with rounded edges, with radii De / 3, of lengths less than 0,75-D _E , with semicircular extremities with radii De / 40 and propellers (9 and 11) are composed of 3 + 6 blades each (7), preferably three blades because three-bladed propellers are much easier to balance. Wind turbine components according to Claims 1 to 4, characterized in that the deflector, flange and propellers allow modular configurations to be made of removable elements, such as fiberglass or fiberglass epoxy. carbon, aluminum sheet, composite materials, plastics, reinforced fiberglass, outer surfaces and inner surfaces must have a roughness of 0.4 + 1.6 pm ensuring a low coefficient of friction in contact with the jet of fluid; propellers can be of type NACA 44 or CK220, profiles obtained by gluing two cavities in the mirror, removable components can be made of carbon fiber, the inside of the cavities can be individually reinforced by a very flexible and resistant honeycomb system, ensuring aerodynamic efficiency and a reduction in mechanical stress, respectively, prolonging the life of the wind turbine propeller and reducing maintenance costs.