JP2010168937A - Upwind type wind power generation facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an upwind type wind power generation facility inhibiting the deterioration of the power generation efficiency even for a wind blowing in a direction intersecting a horizontal direction, such as a blow-up wind. <P>SOLUTION: The upwind type wind power generation facility is provided with: a plurality of rotating blades 6 receiving wind to be rotatively driven and a main shaft; a power generation section 73 rotatively driven by the plurality of rotating blades 6 and the main shaft; a case 3 in which the rotating blades 6 are arranged on a windward side and the power generation section 73 is accommodated; a support strut 2 with the case 3 arranged at an upper end; a tilt angle varying section 9 for varying a tilt angle, which is the angle between the horizontal plane and the main shaft, based on a direction in which a wind blows; and a cone angle varying section 41 for varying a cone angle, which is the angle between a plane perpendicular to the main shaft and the rotating blades 6, based on the tilt angle. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an upwind type wind power generation facility.

  Generally, a wind power generation facility is provided with a rotor blade and a generator at the upper end of a tower, which is a support column extending upward from the ground, and transmits the rotational driving force of the rotor blade that rotates by receiving wind to the generator. By doing so, it is equipment that generates electric power in the generator.

  Since the rotor blades are located at the upper end of the tower, a fixed tilt angle (angle between the horizontal direction and the main axis of the rotor blades) is used to avoid contact between the individual rotor blades and the tower during rotation. It is arranged to have.

  On the other hand, wind power generation facilities are sometimes built in hilly areas, and particularly in Japan, they are often built in hilly areas. In the above-described hilly area, the wind tends to blow along the terrain, and the wind is rarely blown along the horizontal direction.

  Therefore, in the wind power generation facilities constructed in the hilly area, there are many cases where the rotor blades cannot face the direction in which the wind blows. In such a case, since the wind receiving area in the rotor blade is narrowed, there is a problem that the power generation efficiency of the wind power generation facility tends to decrease.

  In order to solve the above-described problem, a windmill having a tilt angle in accordance with a wind blowing direction such as a blowing angle has been proposed in an apparatus including a downwind type windmill (see, for example, Patent Document 1). .

JP 2003-35249 A

  However, in the downwind type windmill described in Patent Document 1, a nacelle, which is a housing containing a tower, a generator, and the like, is disposed on the upstream side of the wind with respect to the rotor blades. For this reason, there is a problem that a wind whose flow is disturbed by a tower or a nacelle may affect the rotor blades.

  In other words, there is a problem that the power generation efficiency in the wind power generation facility is reduced, load fluctuations on individual blades constituting the rotor blades are increased, and noise is increased.

  The present invention has been made in order to solve the above-described problem, and is an upwind type that can suppress a decrease in power generation efficiency even with a wind blowing in a direction intersecting a horizontal direction such as a blowing wind. The purpose is to provide wind power generation facilities.

In order to achieve the above object, the present invention provides the following means.
The upwind type wind power generation facility of the present invention includes a plurality of rotor blades and a main shaft that are rotationally driven by receiving wind, a power generation unit that is rotationally driven by the plurality of rotor blades and the main shaft, and the rotor blades on the windward side. The tilt angle, which is an angle between a housing in which the power generation unit is housed, a support column in which the housing is disposed at an upper end, and a horizontal plane and the main shaft, is based on the wind blowing direction. And a cone angle changing unit that changes a cone angle, which is an angle between a plane orthogonal to the main axis and the rotor blade, based on the tilt angle. It is characterized by.

According to the present invention, by reducing the tilt angle so that the rotating surface of the rotor blade faces the wind blowing direction, it is possible to suppress a decrease in the wind receiving area of the rotor blade.
For example, by changing the tilt angle so that the rotating surface of the rotor blades faces the wind blowing direction, in other words, by changing the direction in which the main shaft extends downward, Reduction of wind area is suppressed.

Further, by changing the cone angle based on the tilt angle, it is possible to avoid contact between the rotary blade and the support column.
For example, when the tilt angle is changed so that the rotor blades face the wind blowing direction, in other words, when the direction in which the main shaft extends is changed downward, the tip of the rotor blade and the support column are There is a risk of both coming close to each other. In this case, by increasing the cone angle, the tip of the rotor blade is separated from the surface orthogonal to the main axis, that is, the support column, so that contact between the rotor blade and the support column can be avoided.

  In the above invention, it is desirable that the tilt angle changing unit changes the tilt angle by changing an attachment angle of the housing with respect to the support column.

  According to the present invention, when the mounting angle of the housing with respect to the support column is changed, the attitude of the main shaft and the rotor blades arranged in the housing to the wind changes. Therefore, the tilt angle is changed by changing the mounting angle of the casing so that the rotating surface of the rotating blade faces the wind blowing direction, and the reduction of the wind receiving area in the rotating blade can be suppressed.

  For example, compared to the case where the tilt angle is changed by changing the mounting angle of the rotor blade and part of the main shaft by providing a flexible coupling on the main shaft, the number of movable parts to which a load such as a flexible coupling is applied is reduced. Can be reduced. For this reason, it is possible to suppress an increase in periodic inspection work or the like of parts that are loaded, and it is possible to suppress a decrease in reliability of the wind power generation facility.

  In the above invention, the main shaft is connected to the rotor blade, and the first main shaft is connected to the power generation unit, the first main shaft being supported so as to be rotatable and capable of changing the direction extending with respect to the housing. And a rotational driving force is transmitted between the second main shaft fixed in a direction extending with respect to the housing and rotatably supported, and the first main shaft and the second main shaft, and A variable connecting portion that enables an angle change between a direction in which the first main shaft extends and a direction in which the second main shaft extends, and the tilt angle changing portion changes a direction in which the first main shaft extends. Is desirable.

According to the present invention, by changing the direction in which the first main shaft extends, the rotation surface of the rotor blades faces the direction in which the wind blows, in other words, the tilt angle can be changed.
Furthermore, even if the tilt angle is changed, the rotational driving force can be transmitted from the first main shaft to the second main shaft and the power generation unit by the variable connecting portion.

  For example, the tilt angle can be changed by changing the attachment angle of only the rotor blade, the first main shaft, and the like as compared with the method of changing the attachment angle of the entire casing. Therefore, the tilt angle can be easily changed.

  In the above invention, when the diameter of the rotating surface of the rotor blade is D, the distance between the central axis of the support column and the rotating surface is in the range of 0.26D to 0.31D. desirable.

  According to the present invention, it is possible to ensure a distance between the tip of the rotor blade and the support column. In particular, even if the tilt angle is changed, the contact between the tip of the rotor blade and the support can be prevented.

  According to the upwind type wind power generation facility of the present invention, it is possible to suppress a decrease in the wind receiving area of the rotor blade by changing the tilt angle so that the rotating surface of the rotor blade faces the wind blowing direction. It is possible to produce an effect that it is possible to suppress a decrease in power generation efficiency even for a wind blowing in a direction intersecting the horizontal direction such as a blowing wind.

1 is an overall view illustrating a configuration of a wind turbine generator according to a first embodiment of the present invention. It is a schematic diagram explaining the internal structure of the wind power generator of FIG. It is a block diagram explaining control of the tilt angle change part and cone angle change part of FIG. 1 and FIG. It is a schematic diagram explaining the state by which the tilt angle was changed by the tilt angle change part of FIG. It is a schematic diagram explaining the structure of the tilt angle change part in the wind power generation equipment of the 2nd Embodiment of this invention. It is a schematic diagram explaining the structure of the support | pillar in the wind power generation equipment which concerns on the 1st modification of the 2nd Embodiment of this invention. It is a schematic diagram explaining the structure of the support | pillar in the wind power generation equipment which concerns on the 2nd modification of the 2nd Embodiment of this invention. It is a schematic diagram explaining the structure of the support | pillar in the wind power generation equipment which concerns on the 3rd modification of the 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, an upwind type wind power generation facility according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is an overall view illustrating the configuration of the wind turbine generator according to this embodiment. FIG. 2 is a schematic diagram illustrating the internal configuration of the wind turbine generator of FIG.
As shown in FIG. 1 and FIG. 2, the wind power generation facility (upwind type wind power generation facility) 1 is a so-called upwind type wind power generation facility that performs wind power generation by receiving wind.

FIG. 3 is a block diagram illustrating control of the tilt angle changing unit and the cone angle changing unit of FIGS. 1 and 2.
As shown in FIG. 1 to FIG. 3, the wind power generation facility 1 has a support column 2 erected on the foundation, a nacelle (housing) 3 installed at the upper end of the support column 2, and a rotation with respect to the nacelle 3. A rotor head 4 rotatably provided around an axis L, a head capsule 5 covering the rotor head 4, a plurality of rotor blades 6 attached radially around the rotation axis of the rotor head 4, A device 7 in the nacelle that generates electric power by rotation, an anemometer 8 that measures the wind direction and wind speed around the wind power generation facility 1, a tilt angle changing unit 9 that adjusts the relative attitude of the nacelle 3 with respect to the column 2, and a tilt angle And a control unit 10 for controlling the changing unit 9 and the like.

  In the present embodiment, the description is applied to an example in which three wind turbine rotor blades 6 are provided. However, the number of wind turbine rotor blades 6 is not limited to three, and the number of wind turbine rotor blades 6 may be two or three. It may be applied to more cases, and is not particularly limited.

  As shown in FIGS. 1 and 2, the support column 2 has a columnar configuration extending upward from the foundation (upward in FIGS. 1 and 2), for example, a configuration in which a plurality of units are connected in the vertical direction. . A nacelle 3 is provided at the top of the support 2. When the support column 2 is composed of a plurality of units, the nacelle 3 is installed on the unit provided at the top.

As shown in FIGS. 1 and 2, the nacelle 3 rotatably supports the rotor head 4, and houses an in-nacelle device 7 that generates electric power by the rotation of the rotor head 4.
The nacelle 3 is provided with, for example, an opening through which a main shaft (not shown) for transmitting the rotational driving force of the rotor head 4 passes and a maintenance doorway.

As shown in FIGS. 1 and 2, the rotor head 4 has a plurality of rotor blades 6 that extend radially about the rotation axis L and are attached at equal intervals in the circumferential direction. Is covered by the head capsule 5.
As shown in FIG. 1, the rotor head 4 is arranged so that the rotation axis L thereof has a tilt angle α that is inclined upward (upward in FIG. 1) from the horizontal direction toward the windward side (left side in FIG. 1). ing.

On the other hand, as shown in FIGS. 1 and 2, the rotor head 4 is provided with a cone angle changing unit 41 that changes a cone angle β described later.
Here, the cone angle β is an angle at which the tip of the rotary blade 6 is inclined toward the windward side from a plane orthogonal to the rotation axis L of the rotor head 4.
As shown in FIG. 3, the cone angle changing unit 41 receives a control signal for controlling the cone angle β from the control unit 10.

Further, as shown in FIGS. 1 and 2, the rotor head 4 has a pitch control unit (not shown) that changes the pitch angle of the rotary blade 6 by rotating the rotary blade 6 around the axis of the rotary blade 6. ) Is also provided.
Thus, when wind strikes the rotor blades 6 from the direction of the rotation axis of the rotor head 4, a force is generated on the rotor blades 6 to rotate the rotor head 4 around the rotation axis L, and the rotor head 4 is driven to rotate.

As shown in FIG. 2, the in-nacelle device 7 supports the rotor head 4 so as to be rotatable and generates electric power by the rotational driving force of the rotor head 4.
In the nacelle device 7, a main bearing 71, a speed increaser 72, and a generator (power generation unit) 73 are mainly provided.

The main bearing 71 rotatably supports the main shaft that transmits the rotational driving force of the rotor head 4 to the generator 73.
The speed increaser 72 increases the rotation of the rotor head 4 and transmits it to the generator 73.
The generator 73 is rotationally driven by the rotation of the rotor head 4 transmitted via the main shaft and the speed increaser 72 to generate power.

As shown in FIGS. 1 and 2, the wind direction anemometer 8 measures the wind direction and the wind speed outside the nacelle 3. The anemometer 8 is disposed on the upper surface of the nacelle 3 behind the rotor blade 6 (the right side in FIGS. 1 and 2) and extends from the nacelle 3 upward (upward in FIGS. 1 and 2). It is arranged at the tip.
The wind direction and the wind speed measured by the wind direction anemometer 8 are output to the control unit 10 described later.

  The anemometer 8 may be disposed on the upper surface of the nacelle 3 as described above, or may be disposed in a tower provided separately from the wind power generation facility 1, and is not particularly limited. . The method of arranging the anemometer 8 in a separate tower is a method suitable for application to a wind farm having a plurality of wind power generation facilities 1.

As shown in FIGS. 1 and 2, the tilt angle changing unit 9 is disposed between the support column 2 and the nacelle 3, and changes the relative attitude of the nacelle 3 with respect to the support column 2, in other words, the inclination angle of the nacelle 3 with respect to the horizontal direction. It is something to control. In this way, by controlling the tilt angle of the nacelle 3, the tilt angle α of the rotor head 4 and the main shaft that are rotatably supported by the main bearing 71 in the nacelle 3 can be changed.
As shown in FIG. 3, the tilt angle changing unit 9 receives a control signal for changing the tilt angle of the nacelle 3, in other words, the tilt angle α, from the control unit 10.

  The configuration of the tilt angle changing unit 9 may be a known configuration such as a hydraulic cylinder, an actuator, or an electric motor, and is not particularly limited.

The control unit 10 controls the tilt angle changing unit 9 and the cone angle changing unit 41 as shown in FIGS.
Information relating to the wind direction and the wind speed measured from the wind direction anemometer 8 is input to the control unit 10. On the other hand, the control unit 10 outputs a control signal for changing the tilt angle α to the tilt angle changing unit 9 and a control signal for changing the cone angle β.

  Next, an outline of a power generation method in the wind power generation facility 1 having the above configuration will be described.

In the wind power generation facility 1, the wind force that hits the rotor blades 6 from the direction of the rotation axis of the rotor head 4 is converted into power that rotates the rotor head 4 around the rotation axis L.
The rotation of the rotor head 4 is transmitted to the in-nacelle device 7, and the in-nacelle device 7 generates electric power according to the power supply target, for example, AC power having a frequency of 50 Hz or 60 Hz.

  Here, at least during power generation, the rotor head 4 is directed to the wind by appropriately rotating the nacelle 3 on the horizontal plane in order to effectively apply the wind force to the wind turbine rotor blades. .

Next, control of the tilt angle α and the cone angle β in the wind power generation facility 1 that is a feature of the present embodiment will be described.
Here, description will be made by applying to control of the tilt angle α and the cone angle β when the wind blows up from the lower side of the wind power generation facility 1.

  The direction and direction of the wind blowing toward the wind power generation facility 1 are measured by an anemometer 8 as shown in FIGS. 1 and 2. Information on the measured wind direction and direction is input to the control unit 10 as shown in FIG. 3, and the control unit 10 sends control signals for changing the tilt angle α and the cone angle β to the tilt angle changing unit 9 and Output to the cone angle changing unit 41.

  For example, the control unit 10 determines whether or not the current tilt angle α and the measured wind direction and direction are within a predetermined range. As a result of the determination, when the current tilt angle α and the measured wind direction are out of a predetermined range, the control unit 10 determines the tilt angle α with respect to the measured wind direction and direction. A control signal is output to the tilt angle control unit 10 so that is within a predetermined range.

  More preferably, the control signal is output so that the rotating surface of the rotor blade 6 faces the wind blowing direction, in other words, the wind receiving area of the rotor blade 6 is increased.

FIG. 4 is a schematic diagram illustrating a state in which the tilt angle is changed by the tilt angle changing unit in FIG.
As shown in FIG. 4, the tilt angle changing unit 9 to which the control signal is input tilts the nacelle 3 downward (downward in FIG. 4) by an angle γ toward the windward side (left side in FIG. 4). Reduce the angle α.
By doing in this way, the rotating surface of the rotor blade 6 comes to face the wind blowing direction.

  At the same time, the control unit 10 determines whether or not the distance between the tip of the rotary blade 6 and the column 2 is narrower than a predetermined distance. As a result of the determination, when the interval between the tip of the rotor blade 6 and the support column 2 is narrower than the predetermined interval, the control unit 10 increases the cone angle β and sets the interval between the tip of the rotor blade 6 and the support column 2. A control signal is output to the cone angle changing unit 41 so as to widen.

  By doing in this way, the space | interval of the front-end | tip of the rotary blade 6 and the support | pillar 2 is ensured, and the contact with the rotary blade 6 and the support | pillar 2 is prevented.

  As a method of changing the cone angle β by the cone angle changing unit 41, there are a method of simultaneously changing the cone angle β in the three rotor blades 6 and a method of changing only the cone angle of the rotor blade 6 approaching the support column 2. It can be illustrated.

  The method of simultaneously changing the cone angle β of the three rotor blades 6 is, in other words, a method of fixing the cone angle β of the rotor blade 6 to the changed value, and the rotor blade 6 is in the state of the cone angle β after the change. It is rotated.

  In other words, the method of changing only the cone angle β of the rotor blade 6 approaching the column 2 is a method of changing the cone angle β of the rotor blade 6 based on the positional relationship with the column 2.

  Specifically, in a section where the rotor blade 6 makes one rotation and is separated from the support post 2, there is no possibility of contact with the support post 2, so the cone angle β of the rotor blade 6 is the angle before the change. The On the other hand, in a section where the rotary blade 6 is close to the support 2, there is a possibility of contact with the support 2, so that the cone angle β in the rotary blade 6 is the changed angle.

According to said structure, the reduction of the wind receiving area in the rotary blade 6 can be suppressed by changing the tilt angle (alpha) so that the rotating surface of the rotary blade 6 may face the wind blowing direction.
For example, the tilt angle α is changed so that the rotating surface of the rotor blade 6 faces the wind blowing direction with respect to the wind blown up, in other words, the direction in which the rotation axis L of the main shaft extends is changed downward. Thereby, the reduction of the wind receiving area in the rotary blade 6 is suppressed.
As a result, in the wind power generation facility 1 of the present embodiment, it is possible to suppress a decrease in power generation efficiency even with respect to wind that blows in a direction intersecting the horizontal direction, such as blowing wind.

Further, by changing the cone angle β based on the tilt angle α, it is possible to avoid contact between the rotary blade 6 and the support column.
For example, when the tilt angle α is changed so that the rotor blade 6 faces the blowing direction of the wind, that is, when the direction in which the rotation axis L of the main shaft extends is changed downward, the rotor blade There is a possibility that the tip of 6 and the support column 2 approach each other and come into contact with each other. In this case, by increasing the cone angle β, the tip of the rotary blade 6 is separated from the rotary surface, that is, the support column 2, which is a surface orthogonal to the rotation axis L of the main shaft. It can be avoided.

  When the mounting angle of the nacelle 3 with respect to the column 2 is changed by the tilt angle changing unit 9, the rotation axis L of the main shaft arranged in the nacelle 3 and the attitude with respect to the wind on the rotary blade 6 change. Therefore, the tilt angle α is changed by changing the mounting angle of the nacelle 3 so that the rotating surface of the rotor blade 6 faces the wind blowing direction, and the reduction of the wind receiving area in the rotor blade 6 can be suppressed. it can.

  For example, by providing a flexible coupling on the main shaft, the tilt angle α is changed by changing the mounting angle of the rotor blade 6 and a part of the main shaft, etc. The number can be reduced. For this reason, it is possible to suppress an increase in periodic inspection work or the like of parts that are loaded, and it is possible to suppress a decrease in reliability of the wind power generation facility 1.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
The basic configuration of the wind power generation facility of the present embodiment is the same as that of the first embodiment, but the configuration of the tilt angle changing unit is different from that of the first embodiment. Therefore, in the present embodiment, only the configuration of the tilt angle changing unit will be described with reference to FIG. 5, and description of other components and the like will be omitted.
FIG. 5 is a schematic diagram illustrating the configuration of the tilt angle changing unit in the wind power generation facility of the present embodiment.
In addition, about the component same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, a first main shaft 104A, a second main shaft 104B, and a flexible coupling (variable) are provided between the rotor head 4 and the generator 73 in the wind power generation facility (upwind type wind power generation facility) 101. A connecting portion) 105 and a tilt angle changing portion 109 are provided.

As shown in FIG. 5, the first main shaft 104 </ b> A transmits the rotation of the rotor head 4 to the generator 73 together with the flexible coupling 105 and the second main shaft 104 </ b> B. The first main shaft 104 </ b> A is a member formed in a substantially cylindrical shape, and is a member that is rotatably supported by the main bearing 71.
The rotor head 4 is connected to the end portion on the leeward side (left side in FIG. 5) of the first main shaft 104A, and the flexible coupling 105 is connected to the end portion on the leeward side (right side in FIG. 5).

As shown in FIG. 5, the second main shaft 104B transmits the rotation of the rotor head 4 to the generator 73 together with the flexible coupling 105 and the first main shaft 104A. The second main shaft 104B is a member formed in a substantially cylindrical shape.
A flexible coupling 105 is connected to the leeward end of the second main shaft 104B, and a generator 73 is connected to the leeward end.

As shown in FIG. 5, the flexible coupling 105 transmits the rotation of the rotor head 4 to the generator 73 together with the first main shaft 104 </ b> A and the second main shaft 104 </ b> B. The flexible coupling 105, for example, absorbs eccentricity and declination between the first main shaft 104A and the second main shaft 104B by the deflection of the flexible portion.
The upstream end of the flexible coupling 105 is connected to the first main shaft 104A, and the downstream end is connected to the second main shaft 104B.

  As described above, the flexible coupling 105 may be disposed between the first main shaft 104A and the second main shaft 104B, and the eccentricity or declination between the other first main shaft 104A and the second main shaft 104B. The member which absorbs may be arrange | positioned and it does not specifically limit.

  As shown in FIG. 5, the tilt angle changing unit 109 is disposed between the floor surface inside the nacelle 3 and the main bearing 71, and can change the attitude of the rotation axis L of the first main shaft 104 </ b> A with respect to the nacelle 3. Is. In other words, the tilt angle α can be changed.

The tilt angle changing unit 109 changes the tilt angle α by expanding and contracting.
Specifically, the main bearing 71 is pushed up in a direction away from the floor surface inside the nacelle 3 by extending the tilt angle changing unit 109. Then, the first main shaft 104A rotates about the flexible coupling 105, and the tilt angle α increases.
On the other hand, the main bearing 71 approaches the floor surface inside the nacelle 3 as the tilt angle changing unit 109 contracts. Then, the first main shaft 104A rotates with the flexible coupling 105 as a fulcrum, and the tilt angle α decreases.

According to the above configuration, by changing the direction in which the first main shaft 104A extends, the rotating surface of the rotor blade 6 can face the direction in which the wind blows, in other words, the tilt angle α can be changed.
Furthermore, even if the tilt angle α is changed, the rotational driving force can be transmitted from the first main shaft 104A to the second main shaft 104B and the generator 73 by the flexible coupling 105.

  For example, the tilt angle α can be changed by changing the mounting angle of only the rotor blade 6 and the first main shaft 104A, etc., compared to the method of changing the mounting angle of the entire nacelle 3. Therefore, the tilt angle α can be easily changed.

[First Modification of Second Embodiment]
Next, a first modification of the second embodiment of the present invention will be described with reference to FIG.
The basic configuration of the wind power generation facility of this modification is the same as that of the second embodiment, but the configuration of the support is different from that of the second embodiment. Therefore, in this modification, only the structure of the support will be described with reference to FIG. 6, and the description of the other components will be omitted.
FIG. 6 is a schematic diagram illustrating the configuration of the support in the wind power generation facility according to this modification.
In addition, the same negative code | symbol is attached | subjected to the component same as 2nd Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 6, an inclined portion 102 that inclines upward toward the windward side is provided at the upper end of the column 2 in the wind power generation facility (upwind type wind power generation facility) 101 </ b> A.

By providing the inclined portion 102, a distance S between the central axis CL of the support column 2 and the rotation surface RP of the rotary blade 6 is secured.
The distance S is set to be in the range of 0.26D to 0.31D when the diameter D of the rotating surface of the rotor blade 6 is used as a reference.

  By doing in this way, the space | interval between the front-end | tip of the rotary blade 6 and the support | pillar 2 can be ensured, and even if the tilt angle (alpha) is changed, the contact with the front-end | tip of the rotary blade 6 and the support | pillar 2 can be prevented. .

  Furthermore, since the weight of the nacelle increases and the load applied to the support column 2 increases, the weight placed on the tip of the support column 2 such as the nacelle does not increase as compared with the method of increasing the total length of the nacelle. Increase in load can be suppressed.

[Second Modification of Second Embodiment]
Next, a second modification of the second embodiment of the present invention will be described with reference to FIG.
The basic configuration of the wind turbine generator of this modification is the same as that of the second embodiment, but the configuration of the nacelle is different from that of the second embodiment. Therefore, in this modification, only the configuration of the nacelle will be described with reference to FIG. 7, and description of other components and the like will be omitted.
FIG. 7 is a schematic diagram illustrating the configuration of the support in the wind power generation facility according to this modification.
In addition, the same negative code | symbol is attached | subjected to the component same as 2nd Embodiment, and the description is abbreviate | omitted.

As shown in FIG. 7, the nacelle (casing) 103B in the wind power generation facility (upwind type wind power generation facility) 101B is a portion on the rotary blade 6 and head capsule 5 side from the support column 2, in other words, the windward side (FIG. 7 is formed so as to protrude.
Furthermore, a weight portion 113B that balances with the portion projecting to the leeward side is disposed in the leeward side (right side in FIG. 7) inside the nacelle 103B.

  By doing in this way, the distance S between the central axis CL in the support | pillar 2 and the rotating surface RP of the rotary blade 6 is ensured. Therefore, a space between the tip of the rotor blade 6 and the support column 2 can be secured, and contact between the tip of the rotor blade 6 and the support column 2 can be prevented even if the tilt angle α is changed.

Furthermore, as compared with the method of forming the inclined portion on the support column 2, the formation of the support column 2 is facilitated and it is possible to prevent the load applied to the support column 2 from being biased.
On the other hand, the total length of the nacelle can be shortened as compared with the method in which the total length of the nacelle is increased and protruded toward the windward and leeward sides.

[Third Modification of Second Embodiment]
Next, a third modification of the second embodiment of the present invention will be described with reference to FIG.
The basic configuration of the wind turbine generator of this modification is the same as that of the second embodiment, but the configuration of the nacelle is different from that of the second embodiment. Therefore, in this modification, only the configuration of the nacelle will be described with reference to FIG. 8, and description of other components and the like will be omitted.
FIG. 8 is a schematic diagram illustrating the configuration of the support in the wind power generation facility according to this modification.
In addition, the same negative code | symbol is attached | subjected to the component same as 2nd Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 8, the nacelle (casing) 103C in the wind power generation facility (upwind type wind power generation facility) 101C is a portion on the rotary blade 6 and head capsule 5 side from the support column 2, in other words, the windward side (FIG. 8 is formed so as to protrude, and the portion on the opposite side, that is, the leeward side (right side in FIG. 8) is formed to protrude by the same length.

  By doing in this way, the distance S between the central axis CL in the support | pillar 2 and the rotating surface RP of the rotary blade 6 is ensured. Therefore, a space between the tip of the rotor blade 6 and the support column 2 can be secured, and contact between the tip of the rotor blade 6 and the support column 2 can be prevented even if the tilt angle α is changed.

Furthermore, as compared with the method of forming the inclined portion on the support column 2, the formation of the support column 2 is facilitated and it is possible to prevent the load applied to the support column 2 from being biased.
On the other hand, compared to a method in which only the windward side of the nacelle is protruded and a weight part for balancing is provided in the nacelle, it is not necessary to arrange a weight part that does not contribute to power generation in the nacelle.

1, 101, 101A, 101B, 101C Wind power generation equipment (upwind type wind power generation equipment)
2 Prop 3, 103B, 103C Nacelle (housing)
6 Rotor 9,109 Tilt angle changing unit 41 Cone angle changing unit 73 Generator (power generating unit)
104A 1st spindle 104B 2nd spindle 105 Flexible coupling (variable connection part)
α Tilt angle β Cone angle

Claims (4)

A plurality of rotor blades and a main shaft that are rotationally driven in response to wind;
A power generation unit that is rotationally driven by the plurality of rotor blades and the main shaft;
A casing in which the rotor blade is disposed on the windward side and the power generation unit is housed;
A support column in which the housing is arranged at the upper end;
A tilt angle changing unit that changes a tilt angle, which is an angle between a horizontal plane and the main axis, based on a direction in which the wind blows;
A cone angle changing unit that changes a cone angle, which is an angle between a surface orthogonal to the main axis and the rotor blade, based on the tilt angle;
An upwind type wind power generation facility characterized in that is provided.   The up-wind type wind power generation equipment according to claim 1, wherein the tilt angle changing unit changes the tilt angle by changing an attachment angle of the housing with respect to the support column. In the main shaft,
A first main shaft connected to the rotor blade and capable of changing a direction extending with respect to the casing and rotatably supported;
A second main shaft connected to the power generation unit, fixed in a direction extending with respect to the housing, and rotatably supported;
A variable connecting portion that transmits a rotational driving force between the first main shaft and the second main shaft, and enables an angle change between the extending direction of the first main shaft and the extending direction of the second main shaft; Is provided,
The upwind type wind power generation facility according to claim 1, wherein the tilt angle changing unit changes a direction in which the first main shaft extends. If the diameter of the rotating surface of the rotor blade is D,
The upwind wind power according to any one of claims 1 to 3, wherein a distance between a central axis of the support column and the rotation surface is in a range of 0.26D to 0.31D. Power generation equipment.

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