KR101998423B1 - Wind power generator including reinforcing structure and control method of the same - Google Patents

Abstract

A wind turbine generator comprising a reinforcing structure is provided. The wind turbine includes a hub, a rotating part and a driving part, a driving part, a hub, and a hub disposed in turn on the tower, at least one blade positioned on the hub, and a reinforcing structure connected to the at least one blade. . The reinforcing structure includes a tension adjusting member, a connecting member and a wire between the hub and the at least one blade. The wind power generator may include a reinforcing structure connected to the blade to disperse or minimize the stresses at the root portion and the central portion of the blade.

Description

TECHNICAL FIELD [0001] The present invention relates to a wind power generator including a reinforcing structure and a control method of the wind power generator.

The present invention relates to a wind power generator, and more particularly, to a wind power generator including a reinforcing structure.

Generally, wind power generators are devices that produce electricity using natural winds. That is, the wind power generator is a device configured to convert kinetic energy of wind into electric energy. The kinetic energy of the wind is converted into electrical energy by rotating the blades and hub of the wind power generator.

When the wind turbine has a horizontal turbine blade (hereinafter referred to as a " blade "), the blade has a cantilever structure protruding from the hub in combination with the hub. The blades are shaped to have aerodynamic shape on the hub and structural stiffness against wind bending stress.

However, since the blade has a cantilever structure on the hub, the blade has a large stress at the root portion and the central portion. In this case, since the root portion and the central portion of the blade are opposed to a large stress, the structure stiffness of the blade is further reinforced, so that the blade can have a large structure and weight. Through this, the wind power generator can have a high manufacturing cost.

In addition, the blade must be thicker than the aerodynamically optimized shape because more advanced materials must be applied to reinforce the structural rigidity. Therefore, although the efficiency of the wind turbine increases as the size of the wind turbine increases, the efficiency of the blade is increased due to the reinforcement of the stiffness of the blade, resulting in a higher manufacturing cost.

In order to solve the problems of the prior art as described above, a problem to be solved by the present invention is to provide a wind power generator including a reinforcement structure adapted to distribute stresses at root portions and central portions of blades.

Other problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here will be fully understood by those skilled in the art from the following description.

Embodiments of the present invention provide a wind turbine including a reinforcing structure. The wind turbine includes a hub, a rotating portion, and a drive portion that are sequentially positioned on the tower, at least one blade positioned on the hub, and a reinforcing structure connected to the hub and the at least one blade reinforcing structure. Wherein the reinforcing structure comprises a tension regulating member, a connecting member and a wire, the tension regulating member being configured to project from the hub and move horizontally with respect to the hub, the connecting member being located on the at least one blade And the wire is configured to connect the tension regulating member and the connecting member and rotate about the tension adjusting member and the connecting member.

Wherein the tension regulating member includes a regulating shaft projecting from the hub, a gear member located inside the hub at a rear end of the regulating shaft, a first bearing located outside the hub and surrounding the regulating shaft, And a first connection link fixed to the first connection link. The wire is coupled to the first connection loop through one end.

Wherein the adjustment shaft is configured to be able to move horizontally relative to the hub in engagement with the gear member and the gear member is configured to be rotatable in the interior of the hub using a linear transfer device including a rack and pinion or a combination of bolts / The first bearing is configured to contact the adjustment shaft and rotate relative to the adjustment shaft.

The at least one blade includes a groove. The connecting member includes a fixed shaft fixed to the at least one blade in the groove portion, a second bearing surrounding the fixed shaft, and a second coupling ring fixed to the second bearing. And the wire is coupled to the second link through the other end.

The second bearing is configured to contact the fixed shaft and rotate with respect to the fixed shaft, the at least one blade configured to rotate with respect to the rotating portion, and the fixed shaft is positioned on the rotating shaft of the rotating portion.

The driving portion is electrically connected to the hub, the rotating portion, and the at least one blade.

As described above, the wind power generator according to the embodiments of the present invention can disperse or minimize the stresses at the root portion and the central portion of the blade, including the reinforcing structure connected to the blade.

Since the wind turbine uses a reinforcing structure to reduce the weight of the blade, the blade can have a large degree of design freedom.

The wind turbine can extend the operating range of the blades using a reinforcing structure.

The wind turbine uses a reinforced structure to control the structural stiffness of the blades, thereby enabling active avoidance from the dangerous operating frequency (resonance).

Since the wind turbine reduces the weight of the blades, it can increase the cost competitiveness.

1 is a schematic diagram showing a wind turbine generator according to embodiments of the present invention.
FIG. 2 is a side view partially enlarging the wind turbine of FIG. 1; FIG.
3 is a cross-sectional view showing the coupling relationship of the regulating shaft, the rotational shaft, and the bearings of FIG. 2;

Below. The wind turbine generator according to embodiments of the present invention will be described in detail with reference to Figs.

1 is a schematic diagram showing a wind turbine generator according to embodiments of the present invention.

Referring to FIG. 1, a wind turbine 140 according to embodiments of the present invention includes a tower 10, a driving unit 20, a rotation unit 30, a hub 40, blades 50 , 60, 70 and a reinforcing structure (S). The tower (10) supports the driving part (20). The driving unit 20, the rotation unit 30, and the hub 40 are sequentially positioned on the tower.

The driving unit 20 is configured to be mechanically connected to the rotation unit 30 and the hub 40. The blades 50, 60, 70 are positioned at a constant pitch on the hub 40. Each of the blades (50, 60, 70) is configured to rotate with respect to the rotation part (30). The blades 50, 60, 70 refer to but are not limited to three in number.

The reinforcing structure S is connected to the hub 40 and the blades 50, 60, 70. In this case, the reinforcing structure S connects the blades 50, 60, and 70 to the hub 40 using the grooves 55, 65, and 75 of the blades 50, . The reinforcing structure S will be described in more detail in FIG.

FIG. 2 is a side view partially enlarging the wind turbine of FIG. 1; FIG. In this case, FIG. 2 does not show a particular blade 60, but in the detailed description, a particular blade 60 will be described with the remaining blades 50 and 70. FIG.

Referring to FIG. 2, the reinforcing structure S includes a tension adjusting member 100, a connecting member 120, and a wire 130. The reinforcing structure S is inserted into the grooves 55, 65 and 75 of the blades 50, 60 and 70 using the tension adjusting member 100, the connecting member 120 and the wire 130. The tension regulating member 100 is configured to project from the hub 40 and move horizontally with respect to the hub 40.

The tension regulating member 100 includes an adjusting shaft 93, a first bearing 95, a first connecting ring 97, and a gear member 99. The adjustment shaft 93 protrudes from the hub 40.

The adjustment shaft 93 is configured to be able to move horizontally with respect to the hub 40 by being engaged with the gear member 99. The first bearing 95 is located outside the hub 40 and is configured to surround the adjustment shaft 93. The first bearing 95 is configured to rotate about the adjustment shaft 93 in contact with the adjustment shaft 93. The first connection ring 97 is fixed to the first bearing 95. The first linking ring 97 may correspond to the number of the blades 50, 60, 70.

The gear member 99 is located inside the hub 40 at the rear end of the adjustment shaft 93. The gear member 99 is configured to horizontally move the adjustment shaft 93 within the hub 40 using a linear transfer device including a rack-and-pinion, or a combination of bolts / nuts. The connecting member 120 is positioned on each of the blades 50, 60, and 70, respectively. The connecting member 120 includes a fixed shaft 113, a second bearing 116, and a second connecting ring 119.

The fixed shaft 113 is located in the grooves 55, 65 and 75 of the blades 50, 60 and 70 and is fixed to the blades 50, 60 and 70. The fixed shaft 113 is positioned on each rotation axis RA that adjusts the angle of the blades 50, 60, and 70. The second bearing 116 is configured to surround the fixed shaft 113. The second bearing 116 is configured to rotate with respect to the fixed shaft 113 in contact with the fixed shaft 113.

The second connection ring 119 is fixed to the outside of the second bearing 116. The wire 130 includes a first connection ring 97 positioned on the adjustment shaft 93 for coupling the hub 40 and the blades 50, 60 and 70, To the second connection loop 119, The wire 130 is configured to correspond to the number of the blades 50, 60, and 70. Through this, the wire 130 is configured to connect the tension adjusting member 100 and the connecting member 120.

3 is a cross-sectional view showing the coupling relationship of the regulating shaft, the rotational shaft, and the bearings of FIG. 2;

3, the reinforcing structure S includes an adjustment shaft 93 on the hub 40 and a fixed shaft (not shown) on each of the grooves 55, 65, 75 of the blades 50, 113). The adjustment shaft 93 and the fixed shaft 113 are configured to pass through the through holes 96 and 117 of the first bearing 95 and the second bearing 116. The first bearing 95 and the second bearing 116 are configured to surround the adjustment shaft 93 and the fixed shaft 113.

The first bearing 95 includes a first inner ring 95A and a first outer ring 95B. The second bearing 116 includes a second inner ring 116A and a second outer ring 116B. The first inner ring 95A and the second inner ring 116A are fixed to the adjustment shaft 93 and the fixed shaft 113. [ The first outer ring 95B and the second outer ring 116B are connected to the first inner ring 95A and the second inner ring 116A using the first balls 98 and the second balls 118 .

The reinforcing structure S includes a first connection loop 97 and a second connection loop 119 which are fixed to the first outer ring 95B and the second outer ring 116B, respectively. Through this, the wire 130 of FIG. 2 is configured to rotate relative to the tension regulating member 100 and the connecting member 120.

Next, a method of driving a wind turbine according to embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG.

1 to 3, a wind turbine 140 according to embodiments of the present invention is prepared as shown in Figs. 1 and 2. Fig. The wind power generator 140 includes a tower 10, a driving unit 20, a rotation unit 30, a hub 40, blades 50, 60 and 70, and a reinforcing structure S. The tower 10, the drive 20, the rotation 30, the hub 40, the blades 50, 60, 70 and the reinforcement structure S are described in FIGS.

Power is supplied to the wind power generator 140. The power source may be supplied to the tower 10, the driving unit 20, the rotation unit 30, the hub 40, and the blades 50, 60 and 70. The driving unit 20 may drive the rotating unit 30, the hub 40, and the blades 50, 60, and 70. The rotation unit 30 may be rotated together with the blades 50, 60, and 70 with respect to the driving unit 20.

The blades 50, 60 and 70 may be rotated on the rotary part 30 in response to the wind intensity. The hub 40 and the blades 50, 60, 70 are rigidly coupled to the reinforcing structure S. Since the reinforcing structure S is rotated relative to the hub 40 and the blades 50, 60 and 70, the reinforcement structure S may be twisted or twisted to the hub 40 and / or the blades 50, 60, It does not have a tangling phenomenon.

The reinforcing structure S moves the adjustment shaft 93 from the hub 40 appropriately when weak winds that do not cause deformation are applied to the initial mounting configuration of the blades 50, So that a proper tension can be maintained on the wire 130 between the adjustment shaft 93 and the fixed shaft 113.

The reinforcing structure S moves the adjustment shaft 93 from the hub 40 to the maximum extent by applying a strong wind that causes deformation to the initial mounting configuration of the blades 50, 93 and the fixed shaft 113 can maintain a large tension on the wire 130. Through this, the reinforcing structure (S) can pull the blades (50, 60, 70) against the strong wind against the hub (40).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10; Tower, 20; The driving unit
30; A rotating part, 40; Hub
50, 60, 70; Blade, 55, 65, 75; Groove
93, 113; Adjustment axis, fixed axis, 95, 116; bearing
96, 117; Through hole, 97, 119; Connecting ring
98, 118; Ball, 99; Gear member
100; Tensioning member, 120; Connecting member
130; Wire, 140; Wind generator
RA; Rotation axis, S; Reinforcement structure

Claims (10)

A hub, a rotary part, and a driving part, which are sequentially positioned on the tower;
At least one blade positioned on the hub; And
A hub, and a reinforcing structure connected to the at least one blade,
Wherein the reinforcing structure includes a tension adjusting member, a connecting member, and a wire,
Wherein the tension regulating member is configured to protrude from the hub and be movable with respect to the hub,
The connecting member being located on the at least one blade, and
Wherein the wire is configured to couple the tension regulating member and the connecting member and rotate about the tension regulating member,
Wherein the tension adjusting member comprises:
An adjustment shaft projecting from the hub,
A first bearing located outside the hub and surrounding the adjustment shaft, and
And a first connection ring fixed to the first bearing,
And the wire is coupled to the first link through one end. The method according to claim 1,
And the wire is rotatably mounted to the connecting member. 3. The method of claim 2,
Wherein the tension adjusting member comprises:
And a gear member located inside the hub at a rear end of the regulating shaft. The method of claim 3,
The adjustment shaft being configured to be axially movable with respect to the hub in engagement with the gear member,
The gear member is configured to horizontally move the adjustment shaft in the interior of the hub using a linear transfer device including a rack-and-pinion, or a combination of bolts / nuts, and
Wherein the first bearing is configured to contact the adjustment shaft and rotate about the adjustment shaft. 3. The method of claim 2,
Wherein the at least one blade includes a groove,
The connecting member includes:
A fixed shaft fixed to the at least one blade in the groove,
A second bearing surrounding the fixed shaft, and
And a second connection ring fixed to the second bearing,
And the wire is coupled to the second connection loop via the other end. 6. The method of claim 5,
Wherein the second bearing is configured to rotate with respect to the fixed shaft in contact with the fixed shaft,
Wherein the at least one blade is configured to rotate relative to the rotating portion, and
And the fixed shaft is located on the rotation axis of the rotary part. 3. The method of claim 2,
Wherein the driving portion is electrically connected to the hub, the rotating portion, and the at least one blade. And a reinforcing structure, wherein the reinforcing structure includes a tension adjusting member provided on the hub, a connecting member provided on the blade, a connecting member provided on the hub, a connection member connected to the tension adjusting member, A method of controlling a wind turbine generator comprising a wire coupled to a member,
When the wind is increased, the tension adjusting member is moved in the axial direction to increase the tension of the wire,
Wherein the tension regulating member includes a regulating shaft projecting from the hub, a gear member located within the hub at a rear end of the regulating shaft, a first bearing located outside the hub and surrounding the regulating shaft, And a first connecting link to be fixed,
Wherein the control shaft is axially moved by the gear member. 9. The method of claim 8,
And wherein the tension adjusting member is moved while allowing the wire to rotate relative to the tension adjusting member and the connecting member. delete

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