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INVENTION
Patent of the Russian Federation RU2211949
WIND POWER GENERATOR
The name of the inventor: Voronezh State Technical University
The name of the patent holder: Voronezh State Technical University
Address for correspondence: 394026 , Voronezh, Moscow Ave, 14, VSTU, Pat. Department
Date of commencement of the patent: 2001.10.31
The invention relates to the field of wind power and can be used in wind turbines for power generation. The technical result, which consists in reducing the weight and dimensions of the wind generator, is provided by the fact that the wind generator mounted on the tower and containing the rotary wind wheel, the segment rotor with windings and the stator, according to the invention, comprises an additional rotatable wind wheel, the winding device, the generator stator is made in The segments of the rotor and stator are installed at the ends of the blades of the two windscreens, which are located on the same base and are provided with flexible coupling, and the zone of interaction of the segments is located between the centers of rotation of the wind-wheels.
DESCRIPTION OF THE INVENTION
The invention relates to the field of wind power and can be used for power generation.
A wind turbine is known with a rotary wind wheel, a magnetic system with windings, in the gap of which the rotor moves, the magnetic system being located on the base located in the zone of the lower position of the blades, and the blades are equipped with ferromagnetic gear plates constituting the rotor, the rotor thus covers the ends of the blades, plates Pass through the air gap of the magnetic system (see SU 861716 A, class F 03 D 1/00, 07.09.1981), on the basis of the essential features of the invention, adopted for the closest analog (prototype).
The disadvantage of the wind generator is the increased mass of the rotor, which actually has a diameter equal to the diameter of the wind wheel itself, which is practically unacceptable in the case of large diameter wind-driven wheels.
The technical result, which consists in reducing the weight and dimensions of the wind generator, is provided by the fact that the wind generator mounted on the tower and containing the rotary wind wheel, the segment rotor with windings and the stator, according to the invention, comprises an additional rotatable wind wheel, the winding device, the generator stator is made in The segments of the rotor and stator are installed at the ends of the blades of the two windscreens, which are located on the same base and are provided with flexible coupling, and the zone of interaction of the segments is located between the centers of rotation of the wind-wheels.
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In Fig. 1 shows a wind generator with two movable pairs of poles facing each other; FIG. 2 shows a top view of the pole pairs, FIG. 3 shows a general view of the installation (front view), FIG. 4 shows a wind generator (top view), FIG. .5 and 6 show variants without intermediate magnetic cores with one air gap, respectively top view and front view. |
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The wind power generator contains 1 two-section coils 2 with cores 3 mounted on the ends of the blades, and segmented pole pieces 4 are attached to the ends of the cores 3. The generator contains intermediate magnetic cores 5. The fastening is carried out by a bolt 6 passing in the channel between the coil sections 2 and in the magnetic core 5, which interacts with Nut 7 installed in the opening at the end of the blade 1. For better closure of the flow there are two pole pieces 4 on each of the ends of the core 3 which are connected by a bridge 8.
The wind power generator is installed on the tower 9, with the tail 11 fixed on the base 10, the flexible connection 12 surrounding the pulleys (sprockets) 13 fixed to the shafts of the turnwheel 14 and the additional turning wind wheel 15. The wind wheels 14 and 15 are equipped with current collectors 16 (" Rotating ring - brush ", similar to the contact rings of an asynchronous motor with a phase rotor). The base 10 is fixed to the rotating platform 17.
In the variant with one clearance of the wind wheel 14, 15, they can be installed with a slight shift in the axis, and the magnetic cores 5 have pole pieces 18. The fastening variants shown in FIGS. 5, 6 include rods 19 at whose ends perpendicular to the axis are threaded, Bolts 6 running through the openings near the pole pieces 4 come into it. The rods 19 and the nut 7 are inserted into the holes formed in the blades 1. In this case, the magnetic cores 5 are located between the rotor 20 and the stator 21.
The first variant of a wind-electric generator with two air gaps (Figures 1, 2) is designed for conventional blades that allow bending in the plane of rotation. The second variant with one gap (Fig. 5, 6) can be used with blades of increased stiffness, when the bend does not exceed the gap size.
Active elements (coils 2 with magnetic conductors 5) are the same type and unified, however one of the coils 2 (rotor 20) is exciting, wound with a thin wire or replaced with washers (not shown) from permanent magnets. Another coil 2 (stator 21 or "counter-rotor") is wound with a thicker wire, the main current collector is carried out from it. The coils 2 and current collectors 16 are connected by wires running in the longitudinal channels of the blades and shafts 1 (not shown).
As a flexible link 12, a chain or a toothed belt is used to prevent the windscreens 14, 15 from slipping and to stabilize the interaction zone of the rotor segments 20 and the stator 21 located midway between the rotation centers of the windscreens 14, 15.
In the second version of the fastening (Fig. 5, 6), the bolts 6 are nonmagnetic or it is expedient to carry out the non-magnetic rod 19. The coil 2 must be made two-section for passage of the fixing bolt 6.
WORK OF THE WIND GENERATOR
Under the influence of the wind flow of the wind wheel, 14 and 15 come into rotation in one direction, and in phase (due to the presence of a flexible connection 12 and gear pulleys (sprockets) 13). At the same time, in the interaction zone located in the middle between the centers of rotation of the wheels 14, 15, displacement of the ends of the blades 1 in mutually opposite directions is observed. Since electromechanical elements - coils 2 with cores 3 are installed on the ends of the blades 1, when excitation of one of the elements - the rotor 20 - the excitation current in the second element - stator 21 will be induced by the emf due to mutual movement of elements periodically entering into the magnetic coupling (twice per revolution For the case of two-bladed wheels). Therefore, in the winding of the stator 21 closed for any load, the current will flow through the circuit: the coil 2 of the stator 21 - the conductor inside the blade 1 and the shaft (not shown) - the current collector 16 - the load.
When the wind direction is changed, the upper part of the tower 9 together with the tail 11 rotates in the bearing of the rotary part (not shown). At the same time, the magnetic systems of the generator are turned. Thus, the air gap of magnetic systems at any orientation of the wheels 14, 15 to the wind retains its parameters, and the generator - efficiency. The electric power received in this way is transformed into any other kinds of energy: mechanical, thermal, etc., and supplied to the consumer.
CLAIM
A wind generator mounted on a tower and comprising a rotary wind wheel, a segment rotor with windings and a stator, characterized in that the generator comprises an additional rotatable wind wheel, a winding device, the stator of the generator is made in the form of segments, the rotor and stator segments being mounted at the ends of the blades of the two windscreens , Which are located on the same base and are provided with a flexible connection, and the interaction zone of the segments is located between the centers of rotation of the wind-wheels.
print version
Publication date 31.01.2007gg
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