KR20130027544A - Wind power generator - Google Patents

Abstract

A wind generator is disclosed. Wind generator according to an embodiment of the present invention, the hub and a rotor including a plurality of blades coupled to the hub; tower; A nacelle cover fixed to the tower and having an slit-shaped opening; A base plate provided inside the nacelle cover and rotatable about an axis facing the tower in a longitudinal direction; A main bearing coupled to the base plate; And a main shaft rotatably supported by the main bearing and connected to the hub through the opening.

Description

WIND POWER GENERATOR {WIND POWER GENERATOR}

The present invention relates to a wind generator, and more particularly to a wind generator for converting the kinetic energy of the wind into electrical energy.

Wind power is a pollution-free energy source in a natural state, and is one of the high economical energy sources among alternative energy sources. The wind generator using the wind refers to a power conversion device that converts the wind energy into rotational kinetic energy, and then converts it into electrical energy.

The wind generator includes a rotor rotated by wind, a nacelle accommodating various mechanical and electrical devices, and a tower supporting the rotor and the nacelle, wherein the nacelle includes an energy conversion device for converting the rotor's rotational energy into electrical energy, For example, main shafts, gear boxes, generators, converters and the like are housed.

The rotor and nacelle are rotated to obtain maximum power as the wind changes, and the Nacelle Yaw System that yaws the nacelle includes elements such as yaw bearings, yaw drives and yaw brakes. do.

However, in the case of the conventional wind generator, since the total weight of the yawing object, that is, the rotor, nacelle and the energy conversion device is tens of tons or more, not only the yaw drive motor is excessively loaded, but also for yawing of the yawing object. This drive motor consumes a lot of power.

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

According to an aspect of the invention, the hub and a rotor comprising a plurality of blades coupled to the hub; tower; A nacelle cover fixed to the tower and having a slit-shaped opening; A base plate provided inside the nacelle cover and rotatable about an axis facing the longitudinal direction of the tower; A main bearing coupled to the base plate; A generator may be provided that is rotatably supported by the main bearing and includes a main shaft connected to the hub through the opening.

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

The wind generator may further include a shielding member having an arc shape and having 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 wind generator further includes a rotation drive member for rotating the base plate, wherein the rotation drive member, a ring-shaped driven gear coupled to the base plate, the tooth is formed on the inner peripheral surface; A drive gear meshing with the driven gear; And it may include a driver for providing a rotational force to the drive gear.

The wind generator 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 while rolling in contact with the upper wall.

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

According to one embodiment of the present invention, the wind generator further comprises an energy conversion member for converting the rotational energy of the main shaft into electrical energy, the energy conversion member, the first bevel gear coupled to the main shaft ; A vertical axis disposed perpendicular to the main shaft and passing through a hole formed in the center of the base plate; A second bevel gear coupled to the vertical axis and engaged with the first bevel gear; A gear box provided on the tower and connected to the vertical axis; And a generator provided in the tower and connected to the gear box.

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

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

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

According to an embodiment of the present invention, it is possible to reduce the total weight of the yawing object.

And, according to an embodiment of the present invention, compared to the conventional wind generator, it is possible to reduce the power consumption of the yaw drive motor.

In addition, according to an embodiment of the present invention, the yawing speed of the yawing object may be increased.

1 is a side view showing a wind generator according to an embodiment of the present invention.
Figure 2 is a perspective view showing the internal configuration of the nacelle cover and tower of Figure 1;
3 is a longitudinal cross-sectional view showing the internal configuration of the nacelle cover and tower of FIG.
4 is a cross-sectional view taken along line AA ′ of FIG. 3.
5 is a view showing the yawing operation of the wind generator according to an embodiment of the present invention.
6 is a cross-sectional view showing the internal configuration of the nacelle cover and 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.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the following description with reference to the accompanying drawings, the same or corresponding components will be given the same reference numerals and redundant description thereof will be omitted. do.

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

Referring to FIG. 1, the wind generator 1 includes a rotor 10, a nacelle cover 20, and a tower 30. 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 may be connected to the main shaft 220 to be described later, and may have a hollow shape inside. Inside the hub 12, a pitch system (not shown), a lubrication system (not shown), various sensors (not shown), and the like may be provided.

The hub cover 14 surrounds the hub 12 while maintaining a predetermined distance from the hub 12. The hub cover 14 may be provided of a non-conductive material, for example, Fiber Reinforced Plastics (FRP) material.

The blade 16 is provided in plurality, and is disposed radially about the hub 12. The blade 16 has an airfoil cross section and is coupled to the hub 12 to have a constant angle of attack against the wind blowing from the front. Wind blowing from the front of the wind generator 1 generates lift as it passes over the surface of the blade 16, which lifts the blade 16 and the hub 12.

The nacelle cover 20 may have a hollow cylindrical shape and is fixed to the top of the tower 30. Slit-shaped openings 22 are formed in the side wall of the nacelle cover 20 along the circumferential direction, and the main shaft 220 connected to the hub 12 extends through the opening 22 into the nacelle cover 20. do. The opening 22 may be shielded by the 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 to be spaced apart in the vertical direction, and may provide a work space for installation and maintenance of the facilities.

Figure 2 is a perspective view showing the internal configuration of the nacelle cover and tower of Figure 1, Figure 3 is a longitudinal sectional view showing the internal configuration of the nacelle cover and tower of Figure 2, Figure 4 is taken along line AA 'of Figure 3 Cross section view. And, Figure 5 is a view showing the yawing operation of the wind generator according to an 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 disc shape, and the hole 110 is formed in the center area thereof. The base plate 100 may be disposed in the horizontal direction perpendicular to the longitudinal direction of the tower 30, and may be positioned below the opening 22 in the nacelle cover 20. The base plate 100 may be rotated about an axis facing the longitudinal direction of the tower 30 by the rotation driving 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, which extends into the nacelle cover 20 through the opening 22. do.

The rotational energy transmitted through the main shaft 220 is converted into electrical energy by the energy conversion 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 to the tower 30 through the hole 110 in the central area.

The first bevel gear 320 is coupled on the main shaft 220, and the second bevel gear 330 is coupled to the upper end of the vertical axis 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 axis 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 to transmit to the generator 350. The generator 350 converts rotational energy output from the gear box 340 into electrical energy.

When the direction of the wind blowing into the wind generator 1 (see FIG. 1) is changed, the rotor 10 (see FIG. 1) and the main shaft 220 may be yawed in the direction of the wind blowing to obtain maximum power. have. The rotation drive member 400 is for rotating the rotor 10 (see FIG. 1) and the main shaft 220, and may include a driven gear 410, a drive gear 420, and a driver 430. Can be.

The driven gear 410 may be provided in a ring shape having teeth formed on an inner circumferential surface thereof, and may be coupled to a bottom surface of the base plate 100. The drive gear 420 is coupled to the rotational axis of the driver 430 and meshes with the driven gear 410.

When the rotational force of the driver 430 is transmitted to the base plate 100 by the driving gear 420 and the driven gear 410, it is supported by the main bearing 210 on the base plate 100 as shown in FIG. 5. The main shaft 220 is rotated, thereby rotating the rotor 10 (see FIG. 1). At this time, the opening 22 of the nacelle cover 20 provides a movement path of the main shaft 220.

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

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

The shield member 500 may have a length that is at least twice as long as the circumferential length of the opening 22, and rotates together with the main shaft 220 and the base plate 100 to shield the opening 22.

Meanwhile, a balance weight 600 may be provided on the main shaft 220. 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 may 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, the balance weight 600 is coupled to the rotor 10,. Weight balance).

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

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

The reinforcement plate 710 may extend upward from the base plate 100 toward the upper wall 24 of the nacelle cover 20. The roller 720 is provided on top of the reinforcing plate 710 and can support the upper wall 24 while rolling in contact with the upper wall 24 of the nacelle cover 20. The reinforcement plate 710 may be located on the base plate 100 opposite the rotor 10 (see FIG. 1) relative to the main bearing 210, and in addition to interference with the main shaft 220 and other components. It can be located anywhere it doesn't work.

In the above, the case in which the gear box 340 and the generator 350 are provided to the tower 30 has been described as an example. Alternatively, the gear box and the generator may be provided inside the nacelle cover 20. This is explained as follows.

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

Referring to FIG. 6, an energy conversion member including a gear box 340 ′ and a generator 350 ′ may be provided inside the nacelle cover 20. That is, the gear box 340 ′ may be disposed on the base plate 100 and connected to the main shaft 220. In addition, a generator 350 ′ may also be disposed on the base plate 100, and the generator 350 ′ may be connected to a gear box.

According to the above configuration, the nacelle cover 20 is fixed to the tower 30, the main shaft 220, the gear box 340 'and the generator 350' provided on the base plate 100 is rotated The rotor 10 (see FIG. 1) may be rotated by the yaw of the main shaft 220.

By the configuration as described above, the wind generator according to an embodiment of the present invention, can reduce the total weight of the rotating (Yawing) object, thereby reducing the power consumption of the driver (that is, the yaw drive motor). In addition, by increasing the rotational speed of the yaw object, the power generation efficiency can be increased in response to the change in the wind direction.

As described above, the embodiments of the present invention have been described, but those skilled in the art may add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention may be modified and changed in various ways, which will also be included within the scope of the present invention.

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: driver 500: shield member
600: balance weight 700: reinforcement member

Claims (10)

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;
A base plate provided inside the nacelle cover and rotatable about an axis facing the longitudinal direction of the tower;
A main bearing coupled to the base plate;
And a main shaft rotatably supported by the main bearing and connected to the hub through the opening. The method of claim 1,
The nacelle cover has a hollow cylindrical shape,
And the opening is formed along the circumferential direction on the sidewall of the nacelle cover. The method of claim 2,
And a shielding member having an arc shape, through-holes through which the main shaft is inserted, and shielding the opening while rotating together with the main shaft and the base plate. The method of claim 1,
Further comprising a rotation drive member for rotating the base plate,
The rotation drive member,
A ring-shaped driven gear coupled to the base plate and having teeth formed on an inner circumferential surface thereof;
A drive gear meshing with the driven gear; And
And a driver for providing rotational force to the drive gear. The method of claim 1,
Further comprising a reinforcing member for reinforcing the strength of the nacelle cover,
The reinforcing member,
A reinforcement plate extending from the base plate toward the upper wall of the nacelle cover; And
And a roller provided at an upper end of the reinforcing plate and supporting the upper wall while rolling in contact with the upper wall. The method of claim 5, wherein
The reinforcement plate is located on the base plate, on the opposite side of the rotor with respect to the main bearing. 7. The method according to any one of claims 1 to 6,
Further comprising an energy conversion member for converting the rotational energy of the main shaft into electrical energy,
The energy conversion member,
A first bevel gear coupled to the main shaft;
A vertical axis disposed perpendicular to the main shaft and passing through a hole formed in the center of the base plate;
A second bevel gear coupled to the vertical axis and engaged with the first bevel gear;
A gear box provided on the tower and connected to the vertical axis; And
And a generator provided to the tower and coupled to the gearbox. The method of claim 7, wherein
And a balance weight provided on said main shaft, said balance weight being provided opposite said rotor about said first bevel gear. The method of claim 8,
The balance weight,
A wind generator having a disc shape and maintaining a constant rotational speed of the rotor and the main shaft by rotational inertia. 7. The method according to any one of claims 1 to 6,
Further comprising an energy conversion member for converting the rotational energy of the main shaft into electrical energy,
The energy conversion member,
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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