KR101466098B1 - Wind power generator - Google Patents

Abstract

A wind turbine generator is disclosed. A wind turbine according to an embodiment of the present invention includes: a rotor including a hub and a plurality of blades coupled to the hub; tower; A nacelle cover fixed to the tower and formed with a slit-shaped opening; A base plate provided on the inside of the nacelle cover and rotatable about an axis Axis facing the longitudinal direction of the tower; A main bearing coupled to the base plate; A main shaft rotatably supported by the main bearing and connected to the hub through an opening; A main shaft rotatably supported by the main bearing and connected to the hub through an opening; And a reinforcing member for reinforcing the strength of the nacelle cover, wherein the reinforcing member comprises: a reinforcing plate extending from the base plate toward the upper wall of the nacelle cover; And a roller provided on the top of the reinforcing plate and supporting the top wall in contact with the top wall and rolling.

Description

WIND POWER GENERATOR {WIND POWER GENERATOR}

The present invention relates to a wind turbine generator, and more particularly, to a wind turbine generator that converts kinetic energy of wind into electric energy.

Wind power is a non-polluting energy source in a natural state, and is one of the most economical energy sources among alternative energy sources. A wind turbine using such wind power is a power conversion device that converts wind energy into rotational kinetic energy and then converts it into electrical energy.

The wind turbine includes a rotor rotating by wind, a nacelle for receiving various mechanical and electrical devices, and a tower for supporting rotors and nacelles. The nacelle includes an energy conversion device for converting the rotational energy of the rotor into electric energy, For example, a main shaft, a gear box, a generator, and a converter.

The rotor and the nacelle are rotated to obtain the maximum power according to the direction of the wind, and the nacelle yaw system for yawing the nacelle includes elements such as yaw bearings, yaw drive, and yaw brakes do.

However, in the case of a conventional wind turbine, since the total weight of the objects to be yaw, that is, the rotor, the nacelle, and the energy conversion device is tens of tons or more, not only an excessive load is applied to the yaw drive motor but also yawing There is a problem that the drive motor consumes a lot of power.

Open Patent Publication No. 10-2012-0127013 (2012.11.21.) Registration Utility Model Bulletin No. 20-0460935 (Jun. 14, 2012)

An embodiment of the present invention is to provide a wind power generator that minimizes the power consumption required for yawing by reducing the total weight of a yawing object.

According to an aspect of the invention, there is provided a rotor comprising: a hub; and a plurality of blades coupled to the hub; tower; A nacelle cover fixed to the tower and having a slit-shaped opening portion; A base plate provided on the inside of the nacelle cover and rotatable about an axis Axis of the tower; A main bearing coupled to the base plate; And a main shaft rotatably supported by the main bearing, the main shaft being connected to the hub through the opening.

The nacelle cover may have a hollow cylindrical shape, and the opening may be formed along the circumferential direction on the side wall of the nacelle cover.

The wind power generator may further include a shield member having an arc shape and formed with a through hole through which the main shaft is inserted and shielding the opening while being rotated together with the main shaft and the base plate.

The wind turbine further includes a rotation drive member for rotating the base plate, wherein the rotation drive member includes: a ring-shaped driven gear coupled to the base plate and having a tooth on an inner peripheral surface; A driving gear engaged with the driven gear; And a driver for providing a rotational force to the driving gear.

The wind turbine further includes a reinforcing member for reinforcing the strength of the nacelle cover, wherein the reinforcing member includes: a reinforcing plate extending from the base plate toward the upper wall of the nacelle cover; And a roller provided at an upper end of the reinforcing plate and supporting the upper wall in contact with the upper wall and rolling.

The reinforcing plate may be located on the base plate opposite to the rotor with respect to the main bearing.

According to an embodiment of the present invention, the wind turbine further includes an energy conversion member for converting rotational energy of the main shaft into electric energy, wherein the energy conversion member includes a first bevel gear ; A vertical axis disposed perpendicularly to the main shaft and passing through a hole formed at the center of the base plate; A second bevel gear coupled to the vertical shaft and meshing with the first bevel gear; A gear box provided in the tower and connected to the vertical shaft; And a generator provided in the tower and connected to the gear box.

The wind power generator may further include a balance weight provided on a side of the main shaft opposite to the rotor about the first bevel gear.

The balance weight has a disk shape and can maintain a constant rotation speed of the rotor and the main shaft by rotational inertia.

According to another embodiment of the present invention, the wind turbine further includes an energy conversion member for converting rotational energy of the main shaft into electric energy, wherein the energy conversion member is disposed on the base plate, A gear box connected to the shaft; And a generator disposed on the base plate and connected to the gear box.

According to the embodiment of the present invention, the total weight of the yawing object can be reduced.

According to the embodiment of the present invention, the consumed electric power of the yaw drive motor can be reduced as compared with the conventional wind power generator.

Further, according to the embodiment of the present invention, the yawing speed of the yawing object can be increased.

1 is a side view showing a wind turbine according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the internal construction of the nacelle cover and the tower of FIG. 1. FIG.
3 is a longitudinal sectional view showing the internal construction of the nacelle cover and the tower of FIG.
4 is a cross-sectional view taken along line A-A 'in Fig.
5 is a view showing yaw operation of a wind turbine according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view illustrating an inner configuration of a nacelle cover and a tower according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

1 is a side view showing a wind turbine according to an embodiment of the present invention.

1, a wind turbine 1 includes a rotor 10, a nacelle cover 20, and a tower 30. As shown in Fig. The rotor 10 is rotatably coupled to the front of the nacelle cover 20 and the nacelle cover 20 is supported by the tower 30.

The rotor 10 includes a hub 12, a hub cover 14 and a blade 16. The hub 12 is connected to a main shaft 220, which will be described later, and may have an hollow hollow shape. A pitch system (not shown), a lubricating system (not shown), various sensors (not shown), and the like may be provided inside the hub 12.

The hub cover (14) surrounds the hub (12) while maintaining a predetermined gap with the hub (12). The hub cover 14 may be provided with a nonconductive material, for example, fiber reinforced plastics (FRP).

A plurality of blades 16 are provided and disposed radially about the hub 12. The blades 16 have an airfoil cross-section and are coupled to the hub 12 to have a constant angle of attack with respect to wind blowing from the front. The wind blowing from the front of the wind turbine generator 1 generates a lift force as it passes over the surface of the blade 16, and the lift force rotates the blade 16 and the hub 12.

The nacelle cover 20 can have a hollow cylindrical shape and is fixed to the top of the tower 30. [ A slit-shaped opening 22 is formed in a side wall of the nacelle cover 20 and a main shaft 220 connected to the hub 12 extends inwardly of the nacelle cover 20 through the opening 22. do. The opening 22 may be shielded by a shielding member 500 to be described later, and a detailed description thereof will be described later.

The tower 30 has a hollow cylindrical shape and supports the nacelle cover 20. A plurality of platforms (not shown) may be provided inside the tower 30. The platform (not shown) may be installed on the inner wall of the tower 30 so as to be vertically spaced apart, and may provide a work space for installation and maintenance of facilities.

FIG. 2 is a perspective view showing the internal construction of the nacelle cover and the tower of FIG. 1, FIG. 3 is a longitudinal sectional view showing the internal structure of the nacelle cover and the tower of FIG. 2, Sectional view. 5 is a view showing yaw operation of the wind turbine according to the embodiment of the present invention.

2 to 5, a base plate 100 is provided inside the nacelle cover 20. The base plate 100 may have a disk shape, and a hole 110 is formed in the center region thereof. The base plate 100 may be arranged in a horizontal direction perpendicular to the longitudinal direction of the tower 30 and may be located below the opening 22 inside the nacelle cover 20. [ The base plate 100 can be rotated about an axis Axis toward the longitudinal direction of the tower 30 by a rotation drive member 400 to be described later.

The main bearing 210 is coupled to the upper surface of the base plate 100 and the main bearing 210 rotatably supports the main shaft 220 extending inside the nacelle cover 20 through the opening 22. [ do.

The rotational energy transmitted through the main shaft 220 is converted into electric energy by the energy converting member 300. The energy conversion member 300 may include a vertical shaft 310, a first bevel gear 320, a second bevel gear 330, a gear box 340, and a generator 350.

The vertical axis 310 may be disposed perpendicular to the main shaft 220. The vertical axis 310 may extend from the top of the base plate 100 through the hole 110 in the central region to the tower 30.

The first bevel gear 320 is coupled to the main shaft 220 and the second bevel gear 330 is coupled to the upper end of the vertical shaft 310. The first bevel gear 320 and the second bevel gear 330 mesh with each other and transmit the rotational force of the main shaft 220 to the vertical shaft 310.

The gear box 340 and the generator 350 may be disposed in the upper space of the tower 30. [ The gear box 340 is connected to the lower end of the vertical shaft 310 and increases the rotational speed input from the vertical shaft 310 to the rated rotational speed of the generator and transmits the rotational speed to the generator 350. The generator 350 converts rotational energy output from the gear box 340 into electric energy.

The rotor 10 (see FIG. 1) and the main shaft 220 may be yawed in the direction of wind blowing to obtain maximum power when the direction of the wind blown by the wind turbine generator 1 (see FIG. 1) have. The rotary drive member 400 is for rotating the rotor 10 (see FIG. 1) and the main shaft 220 and includes a driven gear 410, a drive gear 420, and a driver 430 .

The driven gear 410 is provided in the shape of a ring having teeth on the inner peripheral surface thereof and can be coupled to the lower surface of the base plate 100. The drive gear 420 is coupled to the rotational shaft of the driver 430 and meshes with the driven gear 410.

When the rotational force of the driving unit 430 is transmitted to the base plate 100 by the driving gear 420 and the driven gear 410, the rotational force of the driving unit 420 is transmitted to the base plate 100 by the main bearing 210 on the base plate 100, The main shaft 220 is rotated, whereby the rotor 10 (see Fig. 1) is rotated. At this time, the opening 22 of the nacelle cover 20 provides a path of movement of the main shaft 220.

Through the opening 22 of the nacelle cover 20, an animal such as a bird or rainwater can penetrate. To prevent this, a shielding member 500 for shielding the opening 22 may be provided.

The shielding member 500 may be formed as a plate bent in an arc shape. A through hole is formed in the center of the shield member 500 to allow the main shaft 220 to be inserted therethrough and a bearing 510 for rotatably supporting the main shaft 220 may be installed in the through hole. The shielding member 500 is in contact with the inner surface of the side wall of the nacelle cover 20 forming the opening 22 and can be connected to the base plate 100 by the engaging member 520.

The shield member 500 may have a length that is at least two times longer than the circumferential length of the opening 22 and shields the opening 22 while rotating together with the main shaft 220 and the base plate 100.

On the other hand, the main shaft 220 may be provided with a balance weight (600). The balance weight 600 may be coupled to the opposite side of the rotor 10 (see FIG. 1) about the first bevel gear 320 on the main shaft 220.

The balance weight 600 can balance the weight of the main shaft 220 supported by the main bearing 210. That is, since the rotor 10 (see FIG. 1) is coupled to one end of the main shaft 220 and the balance weight 600 is coupled to the other end of the main shaft 220, See Fig. 1).

The balance weight 600 may have a disk shape so as to function as a fly wheel that keeps the rotational speed of the rotor 10 (see Fig. 1) and the main shaft 220 constant by the rotational inertia.

On the other hand, the nacelle cover 20 may be provided with a reinforcing member 700 for reinforcing the strength of the nacelle cover 20. [ The reinforcing member 700 may include a reinforcing plate 710 and a roller 720.

The reinforcing plate 710 may extend upwardly from the base plate 100 toward the top wall 24 of the nacelle cover 20. The roller 720 is provided at the upper end of the reinforcing plate 710 and can support the upper wall 24 while making contact with the upper wall 24 of the nacelle cover 20 and rolling. The reinforcing plate 710 may be positioned on the base plate 100 on the opposite side of the rotor 10 (see FIG. 1) relative to the main bearing 210 and may also be located on the opposite side of the main shaft 220 and other components Can be located anywhere.

In the above description, the gear box 340 and the generator 350 are provided in the tower 30, but the gear box and the generator may be provided inside the nacelle cover 20. This is explained as follows.

FIG. 6 is a cross-sectional view illustrating an inner configuration of a nacelle cover and a tower according to another embodiment of the present invention. Hereinafter, the same or corresponding components as those shown in FIG. 3 are denoted by the same reference numerals, and a description thereof will be omitted.

Referring to FIG. 6, the energy conversion member including the gear box 340 'and the generator 350' may be provided inside the nacelle cover 20. That is, the gear box 340 'is disposed on the base plate 100 and can be connected to the main shaft 220. Also, the generator 350 'may be disposed on the base plate 100, and the generator 350' may be connected to the gearbox.

The nacelle cover 20 is fixed to the tower 30 and the main shaft 220, the gear box 340 'and the generator 350' provided on the base plate 100 are rotated And the rotor 10 (see FIG. 1) can be yawed by yawing of the main shaft 220.

According to the construction as described above, the wind power generator according to the embodiment of the present invention can reduce the total weight of the yawing object, thereby reducing the power consumption of the actuator (i.e., yaw drive motor) In addition, by increasing the rotation speed of the yawing object, it is possible to promptly respond to the change in the wind direction to increase the power generation efficiency.

While the present invention has been described in connection with certain exemplary embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Wind generator 10: Rotor
20: Nacelle cover 30: Tower
100: base plate 210: main bearing
220: main shaft 300: energy conversion member
310: vertical axis 320: first bevel gear
330: second bevel gear 340: gear box
350: Generator 400: Rotary drive member
410: driven gear 420: drive gear
430: actuator 500: shielding member
600: balance weight 700: reinforcing member

Claims (10)

A rotor including a hub and a plurality of blades coupled to the hub;
tower;
A nacelle cover fixed to the tower and having a slit-shaped opening portion;
A base plate provided on the inside of the nacelle cover and rotatable about an axis Axis of the tower;
A main bearing coupled to the base plate;
A main shaft rotatably supported by the main bearing and connected to the hub through the opening; And
And a reinforcing member for reinforcing the strength of the nacelle cover,
The reinforcing member
A reinforcing plate extending from the base plate toward an upper wall of the nacelle cover; And
And a roller provided on an upper end of the reinforcing plate and supporting the upper wall in contact with the upper wall and rolling. The method according to claim 1,
Wherein the nacelle cover has a hollow cylindrical shape,
And the opening is formed along the circumferential direction on the side wall of the nacelle cover. 3. The method of claim 2,
And a shielding member having an arc shape and formed with a through hole through which the main shaft is inserted and shielding the opening while rotating together with the main shaft and the base plate. The method according to claim 1,
And a rotation driving member for rotating the base plate,
The rotation drive member includes:
A ring-shaped driven gear coupled to the base plate and having a tooth on an inner peripheral surface thereof;
A driving gear engaged with the driven gear; And
And a driver for providing rotational force to the drive gear. delete The method according to claim 1,
Wherein the reinforcing plate is located on the base plate opposite to the rotor with respect to the main bearing. The method according to any one of claims 1 to 4 and 6,
Further comprising an energy conversion member for converting rotational energy of the main shaft into electric energy,
Wherein the energy conversion member comprises:
A first bevel gear coupled to the main shaft;
A vertical axis disposed perpendicularly to the main shaft and passing through a hole formed at the center of the base plate;
A second bevel gear coupled to the vertical shaft and meshing with the first bevel gear;
A gear box provided in the tower and connected to the vertical shaft; And
And a generator provided in the tower and connected to the gearbox. 8. The method of claim 7,
Further comprising a balance weight provided on the main shaft opposite to the rotor about the first bevel gear. 9. The method of claim 8,
The balance weight,
And has a disk shape and maintains the rotational speed of the rotor and the main shaft at a constant level by rotational inertia. The method according to any one of claims 1 to 4 and 6,
Further comprising an energy conversion member for converting rotational energy of the main shaft into electric energy,
Wherein the energy conversion member comprises:
A gear box disposed on the base plate and connected to the main shaft; And
And a generator disposed on the base plate and connected to the gear box.

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