KR101555922B1 - Wind power generator haviing air brake - Google Patents

Abstract

The present invention relates to a wind power generator having an air brake and comprises: a first blade for inducing rotation by energy of wind; a second blade for inducing rotation by energy of wind wherein the second blade is arranged in an inner side of a rotary shaft from the first blade; a link arm for coupling the first and second blades with a rotary arm; the rotary arm expanded between the link arm and the rotary shaft; the rotary shaft rotated by the rotary arm wherein the rotary shaft is coupled with the rotary arm; and an electric generator for generating power by rotation of the rotary shaft wherein the generator is coupled with one end of the rotary shaft. The link arm is rotated in a rotation direction within a predetermined angle by centrifugal force during rotation.

Description

[0001] WIND POWER GENERATOR HAVIING AIR BRAKE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind power generator, and more particularly, to a wind power generator capable of controlling an output using an air brake by centrifugal force.

A wind turbine generator is a generator that converts wind power into mechanical rotational kinetic energy and then converts it into electrical energy. The wind turbine generator is largely divided into a horizontal axis wind turbine and a vertical axis wind turbine according to the direction of the rotation axis relative to the ground. The vertical axis wind power generator is a wind power generation system that is suitable for small wind power generation or less windy urban area in which the rotation axis of the rotor is perpendicular to the ground. Vertical axis wind power generators are classified into drag type and lift type according to aerodynamic characteristics used for power generation. The form of wind power using drag is called Savonius, and the form of wind power using aerodynamic lift is called Darrieus. Darius wind turbines are known to generate higher efficiencies compared to SABONIS wind turbines. A conventional wind turbine is a vertical axis turbine type in which one blade is connected to two or more arrays of arms around a rotation axis, and generally, two to five columns are most commonly known.

On the other hand, a wind turbine generator is a power generation system using natural energy, that is, energy by wind, and it is necessary to appropriately control its output. Methods for controlling the output of such wind power generators are known such as inverter control, blade pitch control, and electric brake control.

 1 shows a method of controlling the output of a conventional wind power generator, which shows a pitch-variable vertical wind power generator.

In Fig. 1, a indicates a blade, b indicates a first link arm, c indicates a link pin, d indicates a rotational connection arm, e indicates a spring rod, and f indicates a spring.

1, the pitch-variable vertical axis wind turbine is provided with a first link arm b and a first link arm b and a rotary connection arm d to the spring rod e and the spring f Thereby controlling the output using the principle that the sense of reception of the blade is stalled when the blade is relaxed by the force corresponding to the tension of the spring when centrifugal force is generated according to the rotation of the turbine.

Figs. 2 and 3 are enlarged views of the blades of the pitch variable type axial wind turbine generator of Fig. 1. Fig.

Fig. 2 shows an initial state of the blade with an attachment angle of 5 deg., And Fig. 3 shows a state in which the attachment angle of the blade is changed to -5 deg by the rotation of the first link arm b as the blade at the time of rotation. That is, the rotational torque decreases as the operating range increases from -5, 4, 2, 1, 0 ° (lift generated) to -1, -2, -3, -4, -5 °. In this case, when the - value becomes large, the angle of attack into the blade becomes large, the blade stalls, and eventually the lift is lost, and the speed deceleration occurs, and the output is controlled using this principle.

However, these techniques have the following problems.

1) Since the spring structure corresponding to the centrifugal force is connected to the rotary link arm of the first link arm, the spring structure is exposed to the rotating field of the turbine, causing flow interference and turbulence, and causing noise.

2) If the turbine size is large, there is a technical limitation in mechanical implementation.

3) Externally exposed type, durability is low and spring elasticity change is serious, so there is a problem in reliability.

4) When the angle of the initial link arm is increased by the aerodynamic force according to the length of the link arm, the maneuverability is improved, but the initial maneuverability is lowered when the initial angle is decreased.

5) The minimum angle is given to the stall area by the spring coefficient corresponding to the centrifugal force and the maximum angle at the point where the link arm is perpendicular to the tangential line of the rotary axis do.

6) At this time, to perform the aerodynamic blake function, the initial attachment angle should be set to 0. Otherwise, it may not be able to perform the aerodynamic braking function because the blade attachment angle at the maximum point is not placed in the stall area.

Korean Registered Patent No. 10-0995880 (issued Nov. 22, 2010) Korean Patent Laid-Open Publication No. 10-2012-0123120 (published on July 11, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wind power generator that provides an air brake function by a centrifugal force corresponding means provided inside a rotary arm using centrifugal force.

Another object of the present invention is to provide a wind power generator capable of controlling an output by controlling a speed increasing unit by means of a wire provided inside a rotary arm by a centrifugal force, thereby controlling the speed change of the speed increasing unit.

According to an aspect of the present invention, there is provided a wind power generator including an air brake, the wind power generator including: a first blade for inducing rotation by energy caused by wind; A second blade disposed inside the rotary shaft from the first blade to induce rotation by wind energy; A link arm coupling the first and second blades with the rotary arm; A rotary arm extending between the link arm and the rotary shaft; A rotating shaft coupled to the rotating arm and rotated by the rotating arm; And a generator that is coupled to one end of the rotary shaft and generates electric power by rotation of the rotary shaft, wherein the link arm is configured to rotate in a rotation direction within a predetermined angle range by a centrifugal force at the time of rotation, And a wind power generator.

Here, it is preferable that the first blade and the second blade are disposed so that their initial attachment angles are different from each other.

The rotary arm may include a first rotary arm coupled to an upper portion of the rotary shaft; And a second rotary arm coupled to a lower portion of the rotary shaft.

The first and second rotary arms include a centrifugal force corresponding bracket that is coupled to the link arm so as to be rotatable by a centrifugal force when the link arm rotates; And a centrifugal force corresponding spring disposed at one end of the centrifugal force corresponding bracket.

The second rotary arm is connected to the centrifugal force corresponding bracket and the variable means of the speed reducer in the interior thereof to transmit a wire for transmitting a force for operating the lever of the variable means of the speed increasing device upon rotation of the centrifugal force corresponding bracket .

Further, the lever of the variable means of the above-described speed reducer can be configured to be shifted by the force transmitted through the wire to shift the speed increasing device.

The output of the booster is coupled to the generator.

The apparatus may further include a wire guide for fixing the wire.

According to the present invention, it is possible to provide a wind power generator that provides an air brake function by a centrifugal force corresponding means provided inside a rotary arm using centrifugal force.

Further, according to the present invention, it is possible to provide a wind power generator capable of controlling an output by controlling a speed increasing unit by means of a wire provided in a rotary arm by a centrifugal force, thereby controlling a speed change of the speed increasing unit.

1 shows a method of controlling the output of a conventional wind power generator, which shows a pitch-variable vertical wind power generator.
Figs. 2 and 3 are enlarged views of the blades of the pitch variable type axial wind turbine generator of Fig. 1. Fig.
FIG. 4 is a diagram illustrating a configuration of a wind turbine generator having an air brake according to an embodiment of the present invention. Referring to FIG.
5 is a view showing the internal structure of the rotary arm 40. As shown in Fig.
Figs. 6 and 7 are diagrams for explaining how the speed changer 80 is shifted by the operation of the wire 73. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a diagram illustrating a configuration of a wind turbine generator having an air brake according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 4, a wind turbine generator including an air brake according to the present embodiment includes a first blade 10, a second blade 20, a link arm 30, a rotary arm 40, a rotary shaft 50, Generator (60).

The first blade 10 and the second blade 20 are rotated by the wind to induce rotation of the rotary arm 40 and the rotary shaft 50. The second blade 20 is disposed closer to the rotation axis 50 than the first blade 10, i.e., inside.

Here, it is preferable that the first blade 10 and the second blade 20 are arranged so that their initial attachment angles are different from each other.

The link arm (30) engages the first blade (10) and the second blade (20) with the rotary arm (40). 4, the link arm 30 is connected to the first blade 10 through the second blade 20 to thereby engage and support the first blade 10 and the second blade 20, Function.

The rotary arm 40 has a function of extending between the link arm 30 and the rotary shaft 50 and transmitting the force generated by the rotation of the first and second blades 10 and 20 to the rotary shaft 50 do.

The rotary shaft 50 is engaged with the rotary arm 40 and rotates by the rotary arm 40 to transmit the force to the generator 60.

The generator 60 is coupled to one end (lower end in FIG. 4) of the rotary shaft 50 and functions to generate electric power by rotation of the rotary shaft 50.

Here, the rotary shaft 50 and the generator 60 can be used as they are known in the prior art, and they are not directly related to the present invention, and detailed description thereof will be omitted.

The wind turbine having the air brake according to the embodiment of FIG. 4 having such a configuration is characterized in that it operates as follows. That is, the first blade 10, the second blade 20, the link arm 30, and the rotary arm 40 are rotated by the wind to generate electric power in the generator 60, The arm 30 rotates within a predetermined angle range in the rotation direction and extends substantially parallel to the rotation arm 40. [ Accordingly, since the angle of attack of the first and second blades 10, 20 is stalled, the air brake effect is generated by this principle, so that the output can be controlled using the air brake effect.

5 is a view showing the internal structure of the rotary arm 40. As shown in Fig.

5, the rotary arm disposed above the rotary shaft 50 is referred to as a first rotary arm 41, and the rotary arm disposed below the rotary shaft 50 is referred to as a second rotary arm 42 for convenience of explanation.

The first rotary arm 41 and the second rotary arm 42 include a centrifugal force corresponding bracket 71 and a centrifugal force corresponding spring 72 in the interior thereof.

The centrifugal force corresponding bracket 71 engages the link arm 30 and the first and second rotary arms 41 and 42. When the link arm 40 is rotated in a predetermined angle range So as to extend in parallel with the rotary arms 41, 42. Although not explicitly shown in the drawing, the rotary arms 41 and 42 pivotally fix the link arm 30 to the rotary shaft, which is the center of rotation, by the rotary link. In other words, the centrifugal force causes the link arm 30 to rotate in the rotational direction about the rotational axis by the rotational link (upward direction in FIG. 5), so that the centrifugal force corresponding bracket 71 rotates counterclockwise Direction).

One end of the centrifugal force corresponding spring 72 is coupled to the end of the centrifugal force corresponding bracket 71 and the other end is fixed inside the rotary arms 41 and 42. When the centrifugal force corresponding bracket 71 rotates as described above, Thereby performing a function corresponding to the centrifugal force. The link arm 30 can be rotated within a predetermined angle when the link arm 30 is rotated by the centrifugal force corresponding spring 72. [

The second rotary arm 42 is connected to the centrifugal force corresponding bracket 71 and variable means of the speed reducer 80 (see FIGS. 6 and 7) And a wire (73) for transmitting a force for operating the lever (81) of the variable means of shorthand. The wire 73 is fixed to the centrifugal force corresponding bracket 71 by the connecting pin 74.

Further, a wire guide 75 is provided so that the wire 73 can be fixed without being shaken.

As described above, when the centrifugal force corresponding bracket 71 is rotated by the rotation of the link arm 30 at the time of rotation, the wire 73 is pulled, and by this force, the lever 81 of the variable means of the speed- So that the speed changer 80 can be shifted. The output of the booster 80 is connected to the generator 60 to drive the generator 60.

The turbine is connected to the input shaft of the speed changer 80. The turbine is connected to the input shaft of the speed changer 80 and the variable means and the output . The variable means provides a shift function, and the accelerator according to the present invention is characterized by using a variable means by a lever system, that is, a method of operating a lever as a variable means. Except for this point, what is known from the prior art can be used as it is, so a detailed description thereof will be omitted. The output of the booster 80 is coupled to the generator 60 to operate the generator 60.

5, the centrifugal force corresponding bracket 71 and the centrifugal force corresponding spring 72 are commonly included in the first rotary arm 41 and the second rotary arm 42, and only the second rotary arm 42 is connected to the accelerator It is needless to say that the first rotary arm 41 may include such a structure.

Figs. 6 and 7 are diagrams for explaining how the speed changer 80 is shifted by the operation of the wire 73. Fig.

6 and 7, the wire 73 is connected to the lever 81 of the variable means of the speed changer 80 so that the lever 81 is moved by the force of the wire 73 moving as described above It is understood that the shifting operation is performed in the speed changer 80.

The present invention described above has the following advantages.

1) It is possible to increase the shift displacement by doubling the blade.

2) Since the transmission means is provided inside the rotary arm, noise is small and interference and turbulence are less generated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Of course.

10 ... first blade
20 ... second blade
30 ... link arm
40 ... rotary arm
50 ... rotation shaft
60 ... generator
80 ... Speedometer

Claims (8)

A wind turbine generator comprising an air brake,
A first blade for inducing rotation by energy by wind;
A second blade disposed inside the rotary shaft from the first blade to induce rotation by wind energy;
A link arm coupling the first and second blades with the rotary arm;
A rotary arm extending between the link arm and the rotary shaft;
A rotating shaft coupled to the rotating arm and rotated by the rotating arm; And
A generator connected to one end of the rotary shaft and generating electric power by rotation of the rotary shaft;
Lt; / RTI >
Wherein the link arm is formed so as to rotate in a rotating direction within a predetermined angle range by a centrifugal force at the time of rotation.
The method according to claim 1,
Wherein the first blade and the second blade are disposed such that the initial attachment angles are different from each other.
The method according to claim 1,
The rotary arm
A first rotary arm coupled to an upper portion of the rotary shaft; And
And a second rotary arm
And an air braking device for supplying the air to the wind turbine.
The method of claim 3,
Wherein the first and second rotary arms have, inside thereof,
A centrifugal force corresponding bracket that engages with the link arm such that the link arm is rotatable by a centrifugal force at the time of rotation; And
A centrifugal force corresponding spring disposed at one end of the centrifugal force corresponding bracket
And an air brake.
5. The method of claim 4,
The second rotary arm
A bracket that is connected between the centrifugal force corresponding bracket and the variable means of the speed reducer and transmits a force for operating the lever of the variable means of the speed increasing /
Further comprising: an air brake for generating an output signal of the wind turbine.
6. The method of claim 5,
Wherein the lever of the variable means of the speed reducer is operated by a force transmitted through the wire to shift the speed increasing device.
The method according to claim 6,
Wherein the output of the wind turbine is coupled to a generator.
6. The method of claim 5,
And a wire guide for fixing the wire.

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