CN114658598A - Wind power generation device and its wind wheel - Google Patents

Abstract

The invention relates to a wind power generation device and a wind wheel thereof, wherein the wind wheel comprises fan blades capable of driving a main shaft to rotate; the fan blades are under the action of electromagnetic force, so that the wind area of the fan blades is larger in a downwind area than in an upwind area. The wind power generation device comprises a tower cylinder vertically standing on the ground, more than 1 wind wheel is respectively arranged on one side or two sides of the tower cylinder, and the wind wheels drive a main shaft which is horizontally arranged; or more than 1 wind wheel is stacked and distributed by taking the tower barrel as the center; the wind wheel drives the vertically arranged main shaft. The invention utilizes the principle that like poles repel and opposite poles attract among magnets, controls the wind area of the fan blade by periodically switching the current direction or rotating the magnetic level, and has high power generation efficiency, small structural loss and long service life. The invention is also suitable for hydroelectric power generation by tide and the like.

Description

Wind power generation device and its wind wheel

technical field

The invention relates to a wind power generating device, in particular to a wind power generating device and a wind wheel thereof which use electromagnetic signals to control the opening and closing of blades in a wind wheel.

Background technique

Wind turbines convert wind energy into mechanical energy and then into electrical energy. Today, there are three common modes of wind turbines on the technical route: propeller type, vertical axis wind turbine type, and horizontal axis wind turbine type.

Generators that use hydroelectric power, such as tidal power, have components similar to wind turbines.

Most of the mainstream propeller-type wind turbines have a horizontal axis, which is characterized by the fact that under normal power generation, the axial direction of the fan is generally parallel to the wind direction. In the process of wind power generation, this type of generator has shortcomings such as large axial pressure, large wind speed damage, weak resistance to strong wind, poor stability, and small torque. High-power propeller wind turbines need to be equipped with extra-long blades to obtain a huge swept area. At present, the common vortex wind turbines have two shortcomings: 1. The blades are too long, and the linear speed of the blade edge is too fast, which poses a threat to the flight of birds; 2. With the change of the wind, the speed of the fan changes greatly, which is not conducive to power generation. stable output of machine current.

Through actual comparison, it is found that under normal working conditions, the wind energy conversion efficiency of the wind turbine wind turbine whose wheel plane is generally parallel to the wind direction is higher than that of the propeller generator, but the following problems still exist in the prior art solution:

1. The larger area of the wind deflector will cause the main shaft and the base to be subjected to excessive force against the wind in the case of strong winds, which will reduce the life of the main shaft;

2. During operation, the blades in the downwind area are not closed tightly to allow ventilation, which reduces the power generation efficiency;

3. During operation, the blades in the upwind area cannot maintain the optimal ventilation angle from beginning to end, which increases the reverse flow resistance.

Therefore, the existing wind power generators and tidal power generators cannot make full use of wind energy or tidal energy, and the power of output electric energy fluctuates greatly, the maintenance frequency is high, and the service life is insufficient.

SUMMARY OF THE INVENTION

In order to solve the deficiencies of the existing wind power generation device, the present invention provides a wind power generation device and a wind wheel thereof.

The technical scheme provided by the present invention is as follows:

A wind wheel of a wind power generation device includes a wind blade that drives a main shaft to rotate under the driving of wind; the wind blade is subjected to the action of electromagnetic force, so that its wind receiving area is larger in the downwind area than in the upwind area.

In one embodiment, the wind blade is a flat-plate structure, and is perpendicular to the circular plane where the wind rotor is located in the downwind region, and parallel to the circular plane where the wind rotor is located in the upwind region.

In one embodiment, the fan blade is a flat-plate structure and is perpendicular to the circular plane where the fan wheel is located; the fan blade further includes a blade that can rotate around a rotation axis, and the rotation of the blade changes the fan blade wind area.

In one embodiment, the rotation axis of the blade coincides with the radial or tangential direction of the circular plane of the rotor.

In one embodiment, the axis of rotation of the blade is its mass balance centerline.

A wind power generation device, using the aforementioned wind wheel.

In one embodiment, the wind power generation device includes a tower standing vertically on the ground, and includes one or two wind rotors located on one side or both sides of the tower, and a circle where the wind rotors are located. The planes are perpendicular to the horizontal plane and both drive the main axis of the horizontal arrangement.

In an embodiment, the wind power generation device includes a tower standing vertically on the ground, and one or more of the wind rotors are respectively centered on the tower and vertically distributed on the tower. On the central axis; the circular plane where the wind wheel is located is parallel to the horizontal plane and drives the vertically arranged main shaft.

In one embodiment, the electromagnetic force driving the wind blade or the blade to rotate to change the wind-receiving area of the wind power generation device is consistent with the periodicity of the relative displacement between the inner and outer shafts generated by the rotation of the main shaft.

In an embodiment of a vertical-axis wind power generation device, a large-mass disk is provided at the bottom of the tower, the moment of inertia of the large-mass disk is greater than that of the wind wheel, and the main shaft drives the large-mass disk to rotate .

The invention utilizes the same-sex repulsion and opposite-sex attraction principle between electromagnets and/or fixed permanent magnets, and automatically controls and periodically switches the wind blades in the wind power generation device by switching the current direction or using the rotating magnetic stage synchronous with the wind wheel. The angle of the wind turbine can change its wind receiving area, which improves the wind energy utilization efficiency and service life of the wind power generation device. When the opening and closing rules of the wind blades are adapted to the change of the water flow direction of the tide, the present invention can also be applied to tidal power generation.

Description of drawings

FIG. 1 is a schematic diagram of the outline structure of a wind power generation device of the present invention.

FIG. 2 is a schematic view of the wind turbine from the top view of the wind power generation device shown in FIG. 1 .

FIG. 3 is a schematic diagram of other operating states of the rotor shown in FIG. 2 .

FIG. 4 is a schematic diagram of the control structure of the fan blade state of the present invention.

FIG. 5 is a schematic diagram of the structure of a fan blade of the present invention.

FIG. 6 is a schematic diagram of another fan blade structure of the present invention.

7 is a schematic diagram of the electromagnet power supply circuit of the present invention.

In the figure, 2. main shaft; 3. direction regulator; 5. wind wheel; 51. fan blade; 513. fan blade root magnet; 514. tangential rotating blade magnet; 515. radial rotating blade magnet; 516. tangential direction Rotating blade; 517. Radial rotating blade; 52. Electromagnet; 54. Sleeve; 56. Sleeve; 7. Tower; 9. Base;

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings. The implementation of the present invention is not limited to the embodiments described below, but can also be implemented in many different forms. The following embodiments are provided for the purpose of facilitating a more thorough and comprehensive understanding of the contents disclosed in the present invention.

It should be noted that the description in this specification that an original is "fixed" to another original means that the original is directly on another original, or there are other centered originals in between; an element described in this specification is "connected" "to another element, means that the original is directly connected to another element, or there is an intervening element in between.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention, and the terms used herein are only for describing specific embodiments, not for limiting the present invention .

The wind wheel of the wind wheel type fan is driven by the wind to rotate to provide power for the generator. The circular plane of the wind wheel is perpendicular to the horizontal plane is the horizontal axis power generation device; the circular plane of the wind wheel is parallel to the horizontal plane is the vertical axis power generation device. For the wind wheel of the horizontal axis power generation device, when it rotates clockwise under the driving force of wind, the upper half circular plane is in the downwind area, and the lower half circular plane is in the upwind area. Similarly, for the wind rotor of the vertical axis power generation device, when it rotates under the driving force of the wind, there are also half circular planes in the downwind area, and half circular planes in the upwind area. If a ray is used to express the wind direction, the wind direction is parallel to the circular plane of the rotor in the working state.

The key point of improving the power generation efficiency of the wind turbine type wind turbine is: when the wind rotor rotates, it should be ensured that the blades rotating downwind can block the wind to the greatest extent to obtain thrust, and at the same time, the blades rotating upwind can maximize the ventilation to reduce the reverse resistance. The key to achieving this is to find a way to allow the blades to change the angle in a timely manner to ensure that the blades in the downwind area are perpendicular to the circular plane of the wind rotor, while the blades in the ventilation area are parallel to the circular plane of the wind rotor. The solution proposed by the present invention is to establish a coupling relationship between the rotation of the blade and the rotation of the main shaft of the wind rotor: every time the main shaft rotates half a circle or 180 degrees, the rotation of the blade changes the angle once. If the blade takes the radial direction of the rotor as the rotation axis, the blade only needs to rotate 90 degrees each time.

As shown in FIG. 1 , it is a schematic diagram of the external structure of a wind power generation device of the present invention. The wind power generation device includes a base 9 placed on the ground, a tower 7 standing on the base 9, 6 wind wheels 5 stacked in turn with the axis of the tower 7 as the center, and a diverter 3 placed at the top . The circular plane of the rotor 5 is a horizontal plane. Each wind wheel 5 also includes 4 wind blades 51, the two wind blades 51 on the right side in the figure are perpendicular to the horizontal plane, and the wind resistance is large; the two wind blades 51 on the left side in the figure are parallel to the horizontal plane, and the wind resistance is small. If the fan blade 51 on the right is located in the downwind area at this time, and the fan blade 51 on the left is located in the upwind area, the fan rotor 5 rotates counterclockwise on the horizontal plane. When each wind wheel 5 rotates under the driving force of the wind, it drives the main shaft perpendicular to the horizontal plane to rotate, and the main shaft transfers the mechanical energy of rotation to the generator to realize wind power generation.

As shown in FIG. 2 , it is a schematic structural diagram of the wind turbine 5 from the top view of the wind power generator shown in FIG. 1 . The center of the circular plane of the wind wheel 5 is the main shaft 2, and when the wind wheel 5 rotates under the driving force of the wind, the main shaft 2 is driven to rotate. Each wind wheel 5 includes four wind blades 51 . The main body of the fan blade 51 is a flat plate structure. The left and lower fan blades 51 are parallel to the horizontal plane, and the right and upper fan blades 51 are perpendicular to the horizontal plane.

As shown in FIG. 3 , it is a schematic diagram of other operating states of the wind wheel 5 shown in FIG. 2 . The four fan blades 51 in FIG. 3A are all perpendicular to the horizontal plane, and the four fan blades 51 in FIG. 3B are all parallel to the horizontal plane. In the state of the wind wheel 5 shown in FIG. 3B , the wind resistance of each wind blade is the smallest, and the main shaft cannot be driven to rotate by the wind force.

FIG. 4 is a schematic diagram of the control structure of the state of the fan blade 51 of the present invention. The fan blade 51 is rotatably connected to the sleeve 56 and can be rotated around the sleeve shaft 54 . There is a fixed connection between the fan blade 51 and the sleeve shaft 54 , and a fixed connection between the sleeve 56 and the main shaft 2 . The fan blade 51 and the sleeve shaft 54 can rotate as a whole because they are also provided with a bearing inside. The fixed circle of the bearing is fixedly connected with the main shaft, and the rotating circle part is fixedly connected with the fan blade 51 . Two sets of electromagnets 52 are distributed on the sleeve 56. When the fan blade 51 is located in the downwind area, one set of electromagnets works, attracting and fixing the fan blade 51 perpendicular to the horizontal plane; when the fan blade 51 is located in the upwind area, the other set of electromagnetic The iron works, attracting and fixing the fan blades 51 parallel to the horizontal plane. There is magnetism on both sides of the root of the fan blade 51 close to the main shaft. For example, a permanent magnet 513 is fixed at the root of the fan blade 51 , or the root of the fan blade 51 is made of magnetic material.

As mentioned above, it can be seen that when the plane of the wind blade 51 of the wind wheel 5 is perpendicular to the circular plane of the wind wheel 5, it has a larger wind resistance area and can obtain the effective promotion of the wind force; on the contrary, the plane of the wind blade 51 is parallel to the wind wheel. 5 circular plane, the wind resistance area is small, and the effective promotion of the wind cannot be obtained.

Figure 5 is a schematic diagram of the structure of a fan blade of the present invention. A blade 516 is rotatably embedded in the interior of the fan blade 51 , and the blade 516 is rotatable about a radial axis (not shown in FIG. 5 ) located at the radial center of the blade 516 . The fan blade 51 includes an electromagnet 52, which can control the blade 516 to be in different opening and closing positions. When the fan blade 51 is located in the downwind area, the electromagnet 52 attracts and fixes the plane of the blade 516 to coincide with the plane of the blade 51. As shown in FIG. 5A, the overall structure of the fan blade 51 is a flat plate; The iron 52 attracts and fixes the blade 516 perpendicular to the plane of the fan blade 51, as shown in Figure 5B. The wind blade 51 shown in FIG. 5 is always perpendicular to the horizontal plane in the wind power generation device, and its state is fixed. When the plane of the blade 516 is coincident with the plane of the wind blade 51, the wind resistance is large, and the wind wheel is driven to rotate; When the plane of the wind blade 51 is vertical, the wind resistance is small, and it can turn over the upwind area. The blades 516 are magnetic, magnetically permeable, or have permanent magnets 514 fixed thereon.

When the radial rotation axis of the vane 516 is located on its radial mass centerline, the vane 516 can dynamically and automatically balance on the horizontal plane when no external force is applied. In the vertical axis wind power generation device, the blade 516 rotates through the upwind region in a manner parallel to the horizontal plane, so in the vertical axis wind power generation device, no electromagnetic force may be applied to the blade 516 at this time.

FIG. 6 is a schematic diagram of another fan blade structure of the present invention. Two blades 517 are rotatably embedded inside the fan blade 51 , the blades 517 being rotatable about a tangential axis (not shown in FIG. 6 ) located at the tangential centerline of the blades 517 . The blade 51 includes an electromagnet 52, which can control the blade 517 to be in different positions in different opening and closing states. When the fan blade 51 is located in the downwind region, the electromagnet 52 attracts and fixes the blade 517 to coincide with the plane of the fan blade 51 , as shown in FIG. 6A . The overall structure of the fan blade 51 is a flat plate; when the fan blade 51 is located in the upwind area, the electromagnet 52 attracts and fixes the blade 517 perpendicular to the plane of the fan blade 51, as shown in FIG. 6B . As shown in FIG. 6, the wind blade 51 is always perpendicular to the horizontal plane in the wind power generation device, and its state is fixed. When the blade 517 coincides with the plane of the wind blade 51, the wind resistance is large, and the wind wheel is driven to rotate; When it is perpendicular to the plane of the wind blade 51, the wind receiving area is small and the wind resistance is small, and it can turn over the upwind area with a small resistance. The blade 517 is magnetic, can be magnetically permeable, or has a permanent magnet 515 fixed thereon.

When the tangential rotation axis of the blade 517 is located on its tangential mass centerline, the blade 517 can dynamically and automatically balance on the horizontal plane when no external force is applied. In the horizontal axis wind power generation device, the blade 517 rotates through the upwind region in a manner parallel to the horizontal plane, so in the horizontal axis wind power generation device, no electromagnetic force may be applied to the blade 517 at this time.

As can be seen in FIG. 6 , the electromagnet of the fan blade 51 is located in the middle of the two blades 517 of the fan blade. When the electromagnet is energized, an electromagnetic force can be applied to the two blades 517 at the same time, so that the two blades 517 are closed and opened at the same time. .

7 is a schematic diagram of the electromagnet power supply circuit of the present invention. The positive and negative poles of the DC power supply are two corresponding semi-circles. The two input ends A and B of the electromagnet periodically sweep over the electrodes of the DC power supply according to the rotation speed of the wind wheel 5. Flip, the N/S polarity of the corresponding electromagnet is periodically flipped. Or the two input ends A and B of the electromagnet periodically swing between the positive and negative poles of the DC power supply, driving the polarity of the electromagnet to periodically reverse.

The rotational degrees of freedom of the blades in Figures 5 and 6 are 90 degrees. In FIG. 7 , the two input ends A and B of the electromagnet are periodically switched between the power supply nodes 1 and 3 through the switches K1 and K2 according to the position of the directional regulator 3 and the rotational speed of the wind rotor 5 , so as to control the wind blade 51 or The electromagnets of vanes 516 and 517 periodically change polarity. The two input ends A and B of the other electromagnet in FIG. 7 are connected to both ends of the DC power supply following the rotation of the wind wheel 5, thereby changing the N/S polarity of the electromagnet.

Specifically, the left side of FIG. 7 is a circuit diagram of a conventional electromagnet magnetic pole reversal caused by the reversal of the positive and negative electrodes of the current. Among them, A and B are respectively connected to the current input and output terminals of the electromagnet coil. When the two switches K1 and K2 are reversed from the contact 3 to the contact 1 at the same time, the current direction of the electromagnet is reversed, which causes the magnetic pole of the electromagnet to reverse. On the right side of Fig. 7, A and B are both arranged on the rotating shaft, and their contacts all rotate with the rotating shaft. A and B are respectively drawn out from the two ends of the rotating shaft and connected with the inlet and outlet ends of the electromagnet. The positive and negative electrodes of the DC battery are respectively connected with two semicircular fixed conductive shells outside the rotating shaft. When the internal rotating shaft rotates 180 degrees, the positive and negative electrodes contacted by A and B are switched once, so that the current direction of the electromagnet is reversed and the magnetic pole of the electromagnet is reversed. In the same way, it can also be set that the inner shaft is fixed and the outer shaft rotates. After the outer shaft rotates 180 degrees relative to the inner shaft, the positive and negative electrodes contacted by A and B will be switched once, so that the current direction of the electromagnet will be reversed. turn, causing the poles of the electromagnet to flip. On one main shaft, multiple groups of A and B (such as A1 and B1, A2 and B2, A3 and B3, and so on) can be set up and connected to different electromagnet coils to control the opening and closing of multiple blades at the same time. combine. The electromagnet set on the fan blade 51 and the spokes of the fan wheel are connected with two power sources (named as Y1 and Y2 respectively), so as to ensure that only one power source is in the power supply state at any time. When the rotor is in a non-generating state (eg in the upwind area), the Y1 power supply makes the magnetic pole directions of all electromagnets the same as the magnetic pole directions of the permanent magnets adjacent to the blade. This causes all the blades on the rotor to be in open mode, a mode with less wind resistance. When the wind turbine is switched to the power generation mode (for example, in the downwind area), the Y1 power supply will be cut off and the Y2 power supply will be turned on. In the case of Y2 power output, the electromagnet on the wind wheel will automatically enter the rotation reversal state. That is, according to the mode of the circuit diagram in Figure 7, every 180 degrees of rotation, the electromagnet poles on each group of spokes or the fan blades 51 are automatically flipped once, thereby driving the corresponding blades to open and close periodically, and then driving the rotor to enter around its main axis. Rotational work and power generation modes.

As an embodiment of the present invention, as shown in FIG. 7 , the DC power supply and the power supply ring are fixed on the tower, the outer part of the power supply ring is an insulating layer, and the inner part is a conductive layer. The inner conductive layer XA of the power supply ring includes two semicircles insulated from each other; they are respectively connected to the positive and negative electrodes of the DC battery. Under the control of the control system, the angles of the two semi-circles can track the azimuth of the top directional controller and keep the azimuth synchronization all the time. The wires of the power input end and output end of the electromagnet YA that control the wind blade are drawn out from the upper and lower perforations adjacent to the blade, respectively, and are connected to the ends of the conductive columns A and B respectively. The central part of the cylinder at the ends of the conductive columns A and B is the conductor. , the other parts are insulators. The terminal A of the conductive column and the terminal B of the conductive column are provided with contacts on the inner layer of the power supply ring, and the contacts of the ends A and B of the conductive column are dynamically divided on the inner conductive layer of the power supply ring, and the angle between them is 180 degrees. .

The wind turbine power generation device of the present invention can be a horizontal axis and/or a vertical axis, as well as a single wind wheel, a double wind wheel or a multi-wind wheel scheme and the freedom of the horizontal axis single/double wind wheel and the vertical axis multi-wind wheel combination. The movement of the wind wheel in the wind power generation device with the horizontal axis wind wheel is similar to the rotation of the Ferris wheel in the amusement park, and the movement of the wind wheel in the vertical axis wind power generation device is similar to the movement of the carousel in the amusement park.

In the wind turbine power generation device of the present invention, its blades can be automatically opened and closed by technical means, and the opening and closing rules include but are not limited to:

When the remote command and/or the wind turbine system determines that there is no wind, or the wind speed exceeds the standard according to the rotational speed of the diverter 3 and the wind rotor 5, or when it is not suitable for the wind rotor 5 to rotate and generate electricity, all the blades in the wind rotor 5 are automatically placed in the Open for ventilation. That is: regardless of whether the rotor itself is stationary or rotating, all blades automatically maintain an angle parallel to the horizontal plane or at the lowest flow resistance angle.

For the horizontal axis wind turbine to generate power, when the remote command and/or the wind turbine system determines that the wind speed is within the range suitable for power generation, the blades will automatically switch the angle during the rotation of the wind turbine. The switching method is as follows: when the blade is in the lower semicircle, its angle always maintains a horizontal or low flow resistance penetration angle; and when the blade is in the upper semicircle, the angle of the blade always maintains the same and the plane of the blade 51 where it is located. A closed state where the spoke angles are flush.

For the case of vertical axis wind turbine power generation, when the remote command and/or the wind turbine system determines that the wind speed is in a suitable range for power generation, the blades will automatically switch the angle during the rotation of the wind turbine. The switching method is: with the direction of the direction regulator 3 as the distal end, when the blade is in the left semicircle, its angle always maintains a low flow resistance penetration angle parallel to the horizontal plane; and when the blade is in the right semicircle, the blade automatically Rotation switches to a closed state that remains in contact with the spoke face and perpendicular to the horizontal plane.

Implementation method: The wind wheel of the present invention is composed of a main shaft, spokes and an outer ring (optional), where the spokes are equivalent to the aforementioned fan blades, and the fan blades are fixed in position and do not rotate around their own rotation axis. A wind wheel is provided with at least one set of spokes, preferably two, three or four sets of spokes. The combination of the blade and the spoke includes at least two ways: the first type of the blade rotates around the radial rotation axis, and the second type is that the blade rotates around the tangential rotation axis. When the blades are parallel to the circular plane of the rotor, the blades are in a ventilation state (open state). When the blade rotates to be perpendicular to the circular plane of the wind rotor, the blade is in a wind-blocking state (closed state).

If a blade rotates to a state that coincides with the horizontal plane and passes through the upwind area, no electromagnetic force is applied to the blade in the upwind area, but a gravity self-balancing blade is designed. The mass centerline of the blade can achieve equal weight on both sides of the blade without external force, so that the blade remains horizontal until it enters the downwind area, at which time electromagnetic force is applied to deflect it. On the spokes of the rotor, one or more gravity self-balancing blades can be fixed.

In the horizontal axis wind power generation device, when the wind rotor drives the main shaft to rotate, and a certain group of spokes in the wind rotor and the blades to which they belong are located in the lower semicircle below the horizontal line centered on the main shaft, the permanent magnet poles (or electromagnetic poles at both ends of the blade) ferromagnetic poles) and the magnetic poles of the adjacent spoke rungs are in a state of like repulsion. At this time, the blade is kept in a horizontal state due to its own gravity self-balancing. When wind or water flows through the gravity self-balancing blade, the fluid Bernoulli effect is superimposed, and the blade will automatically rotate and adaptively adjust to the lowest flow resistance. The angle of the state, and the low flow resistance angle is always maintained during the rotation of the wind rotor; whenever any group of spokes and the blades included are in the position where the upper semicircle does work, the magnetic poles of the blades are fixed on the adjacent spoke crosspieces. The magnetic poles of the electromagnet will automatically switch to the opposite sex attracting state. Through the switching action of electromagnetic force and/or mechanical lock (automatic engagement of mechanical hooks), a fixed or locked relationship is formed between the two ends of the blade and the respective adjacent spoke rungs, so that the group of blades is in a closed state, the wind resistance is the largest, and the to the blocking effect of wind or water flow.

During the rotation of the wind rotor, the orderly switching between the transparent and closed states of the blades is continuously maintained, so that the blades of the semicircular part of the wind rotor can obtain thrust under the action of wind or water flow, which drives the entire wind rotor to rotate around the main axis. The wind rotor blades in the retrograde/ventilation semicircle part are in a horizontal or low flow resistance transparent state, which ensures that the spoke blade group in the non-power semicircle area of the wind rotor is in the process of retrograde flow with the fluid. The resistance of the wind turbine generator is very small, thereby improving the overall efficiency of the rotating work of the wind turbine generator.

For the switching circuit of the direct current direction of each group of spoke (blade) electromagnets, FIG. 7 is an embodiment of the present invention. When any group of spokes are in the lower semicircle position, the current direction of the electromagnet is automatically switched to the reverse direction, so that the magnetic pole of the driving electromagnet and the permanent magnet on the blade repel each other; when the spoke is in the upper semicircle position, its electromagnetic The current direction of the iron is switched to the positive direction again, thereby creating an opposite attraction with the permanent magnet of the blade. Further, the spoke crosspiece and the two ends of the blade are driven by the electromagnet to form a bite or lock. When the current of the electromagnet is turned, the engagement or locking relationship is automatically released.

Further, in order to realize the low flow resistance self-balancing of the blade in the open/transparent state, the shape of the blade can be designed with a curved surface; in order to reduce the impact force between the blade and the spoke due to the opening and closing, the permanent The periphery of the magnet is wrapped with cushioning materials such as rubber.

The invention utilizes the same-sex repulsion and opposite-sex attraction principles between electromagnets and/or fixed permanent magnets, and automatically controls and periodically switches the opening and closing states of the blades in the fan blades by switching the current direction or the rotating magnetic stage direction. During the rotation of the wind rotor, the vanes in the semicircular area facing the wind are automatically closed to block the wind, and the vanes in the semicircular area facing the wind are automatically opened to ventilate the wind. Furthermore, when the blade is in the state of automatic opening, through the gravity self-balancing and wind resistance effect of the blade, the penetration angle of the minimum wind resistance can be automatically maintained during the rotation process. In this way, the wind turbine generator can achieve maximum wind resistance in the semicircular part of the wind turbine power generation device, and maximize wind ventilation in the counterwind rotating semicircle part, so as to reduce the resistance of the headwind.

The present invention can also be applied to tidal power generation. Taking the horizontal axis wind rotor as an example, it is only necessary to change the blade opening and closing rules of the upper and lower semicircles, that is: when the tide hits the front, the blades in the upper semicircle area are automatically locked, and the blades in the lower semicircle area are automatically opened. Automatically switch to the upper semi-circular blade that automatically opens and penetrates the water, and the lower semi-circular blade automatically locks and blocks the water, so that the wind wheel can rotate in one direction throughout the whole process to generate electricity.

The wind wheel of the present invention can be applied to both the horizontal axis power generation device and the vertical axis power generation device. For the horizontal axis wind turbine power generation device, the center of the main shaft is taken as the midpoint and the horizontal line is used as the separation, and the wind rotor is divided into an upper semicircle and a lower semicircle.

For the vertical axis wind turbine power generation device, the empennage (also known as the tail rudder, the steering device) and the main shaft center line are used as the longitudinal separation line, and the wind rotor is divided into left semicircle and right semicircle. Since multiple sets of wind turbine generator sets can be set from top to bottom on the vertical axis, both the wind-receiving area of the blades and the space utilization rate of the power generation equipment are much higher than those of the existing propeller-type wind generators. The horizontal axis wind power generation device can also be provided with multiple sets of wind rotors.

The vertical axis wind turbine generator can be installed on a tower, from top to bottom, with multiple groups of wind turbine generators with the same diameter or different diameters, and its space utilization rate is high.

The wind turbine fan and the automatic blade opening and closing method of the present invention can be preset as all the blades are in the open and ventilated state, and can also be switched to the working state of automatic closing of the power area and automatic opening of the blades in the upwind area at any time. This switching can be carried out at any time to meet the commanded demand for power grids such as grid peak shaving and valley filling, and realize flexible power output.

The invention can also realize that the speed of the main shaft of the fan rotates at a more stable medium and low speed by increasing the moment of inertia to generate electricity. The specific method is to set a large-mass disc at the base of the vertical axis fan or below the ground plane, and the main shaft drives the rotation. The greater the moment of inertia of the vertical axis of the fan, the more stable its speed, and the better the stability of the entire fan and the stability of the power output. By increasing the moment of inertia and reducing the rotational speed of the fan blades, the threat to bird safety from wind power equipment is greatly reduced. Moreover, the large disc and generator set are located underground to improve the sound insulation effect, and the noise problem of high-power wind turbines can also be solved.

As an embodiment, it is a control system suitable for a wind turbine power generation device with its own blade turning function. Its technical feature is that it possesses at least one automatic turning mechanism. Specifically, the reversal mechanism is the reversal of the magnetic pole caused by the instantaneous reversal of the current flow in the electromagnet coil. Including: because the DC power supply connected to the coil of the electromagnet changes with the connection between the dynamic contact of the flip circuit and the power supply, the connection of the positive and negative poles is switched and the magnetic pole of the electromagnet is flipped. Among them, the dynamic contact is the conductive connection point between the rotating shaft of the main shaft of the wind wheel and the relatively stationary shaft. When the positive and negative poles of the DC power supply are periodically switched with the rotation of the main shaft, it will inevitably cause the NS magnetic poles of the electromagnets on the spokes to synchronously produce periodic reversals, and then push the blades of the same group on the spokes in the magnetic force. Under the action, periodic rotation around the axis is generated to realize the opening and closing of the blades; the magnetic force refers to the force generated between adjacent magnetic poles due to the attraction of opposites and the repulsion of identicals.

As one embodiment of the present invention, there is a power generating device that rotates around a main shaft and converts kinetic energy output into electricity. It is characterized in that the main shaft of the wind rotor and the flow direction of the external fluid such as wind or water flow, through the self-adjusting device such as the tail, try to keep the main shaft centerline and the fluid streamline at a right angle of 90 degrees, and some blades are subjected to the force of the wind or water flow. And drive the spindle to rotate. According to the different relationship between the main shaft of the wind rotor and the horizontal plane, it can be divided into two categories: horizontal axis wind rotor and vertical axis wind rotor. These two types of wind rotors (referring to the horizontal axis wind rotor and the vertical axis wind rotor) can be provided with one or more sets of supporting structures with the main shaft of the wind rotor as the center and the spokes as the skeleton of the wind rotor. The support structure can be provided with one or more a blade shaft. When a group of blades is in a fully closed state, a radiating surface with the centerline of the main shaft of the wind rotor as the center and the spokes as the skeleton can be formed as a working surface for obtaining fluid thrust.

As an embodiment of the present invention, the wind turbine power generation device includes a main shaft, an outer circle, and a plurality of sets of spokes connecting the main shaft and the outer circle in structure. The blade can rotate around the blade rotating shaft, and the blade rotating shaft and at least one group of spokes form a working surface combination relationship. For the horizontal axis wind rotor, the blade rotation axis is in a parallel relationship with the main shaft centerline of the wind rotor; for the vertical axis wind rotor, the blade rotation axis is in a 90-degree right-angle relationship with the main axis centerline of the wind rotor.

In one embodiment, the layered stacking of multiple vertical-axis wind turbines can be realized by relying on the same support column, so as to more fully utilize the vertical longitudinal space of the support column; these stacked multiple wind turbine power generation devices can also be shared. A set of control system realizes centralized control of power generation power regulation and grid-connected power transmission.

In one embodiment, a wind power plant group that automatically adjusts the output power of wind power according to wind changes and grid commands. Its technical feature lies in the blade main control opening and closing circuit whose control system can be switched freely. Specifically, it includes: automatically putting all the blades of the wind turbine generator in the open state; and, switching to the working state, the blades of the corresponding wind turbine generator automatically enter the automatic opening and closing rotation state based on dynamic rotation, thereby driving Spindle and motor generate electricity. The benefit is that it can better meet the needs of grid grid power load regulation.

In one embodiment, the horizontal axis wind turbine power generation device is technically characterized in that in the design of the blade cross-section, a spindle-shaped or water-drop-shaped streamline structure is used to reduce the fluid resistance when opening and ventilating, and by means of wind resistance and blade self-propelling The balancing effect reduces retrograde drag when the blades are open.

In one embodiment, a wind-wheel power generation device sharing a vertical axis and a combination thereof are technically characterized in that a plurality of wind-wheel power generation devices can share a support column and a tail wing, and the main shafts are fixed in a longitudinally superimposed manner to form a As a whole, it realizes the driving of the same power generation device.

The technical features of the above-described embodiments can also be combined in other combinations, and for the sake of brevity, all possible combinations of the technical features are not fully described here. It is stated here that as long as there is no contradiction in the combination of these technical features, they all belong to the scope of the description in this specification.

The above-mentioned embodiments specifically and in detail describe several embodiments of the present invention, which are not intended to limit the scope of the invention patent. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention belong to the protection scope of the present invention, and the protection scope of the patent of the present invention shall be subject to the claims.

Claims (10)

1. A wind wheel of a wind power generator, comprising a wind blade that drives a main shaft to rotate under the driving of wind force; it is characterized in that, the wind blade is subjected to the effect of electromagnetic force so that its wind-receiving area is larger in the downwind area than in the upwind area. 2 . The wind rotor of a wind power generator according to claim 1 , wherein the wind blade is a flat-plate structure, and is perpendicular to the circular plane where the wind rotor is located in the downwind area, and is parallel to the circular plane in the downwind area. 3 . Describe the circular plane where the wind wheel is located. 3. The wind wheel of claim 1, wherein the wind blade is a flat plate structure and is perpendicular to the circular plane on which the wind wheel is located; the wind blade further comprises a rotating shaft that can surround A rotating blade, the rotation of the blade changes the wind receiving area of the fan blade. 4 . The wind rotor of a wind power generating device according to claim 3 , wherein the rotation axis of the blade coincides with the radial or tangential direction of the circular plane of the wind rotor. 5 . 5 . The wind wheel of claim 4 , wherein the rotation axis of the blade is the center line of its mass balance. 6 . 6. A wind power generating device, characterized in that the wind rotor according to claims 1-5 is used. 7. The wind power generation device according to claim 6, characterized in that it comprises a tower standing vertically on the ground, and comprises one or two said wind wheels which are placed on one side or two sides of said tower. , the circular plane on which the wind wheel is located is perpendicular to the horizontal plane and drives the horizontally arranged main shaft. 8. The wind power generation device according to claim 6, characterized in that, it comprises a tower standing vertically on the ground, and one or more of the wind rotors are respectively centered on the tower and are vertically distributed in the on the central axis of the tower; the circular plane where the wind wheel is located is parallel to the horizontal plane and drives the vertically arranged main shaft. 9 . The wind power generator according to claim 7 or 8 , wherein the electromagnetic force that drives the fan blade or the blade to rotate to change the wind-receiving area of the fan blade has a difference between the inner and outer shafts generated by the rotation of the main shaft. 10 . The periodicity of the relative displacement between them is consistent. 10 . The wind power generation device according to claim 8 , wherein a large-mass disc is provided at the bottom of the tower, the moment of inertia of the large-mass disc is greater than that of the wind wheel, and the main shaft drives the large-mass disc. 11 . The mass disc rotates.

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