JP4638163B2 - Windmill equipment - Google Patents

Description

  The present invention is applied to wind turbine apparatuses in general, such as a wind turbine power generator, and a prop is erected on a foundation surface of a floating body suspended on the ocean or a foundation surface on the ground, and rotational force is generated by wind force acting on a plurality of wings. The present invention relates to a windmill device configured to support a nacelle housing a rotating device such as a generator driven by the windmill and a generator driven by the windmill on an upper portion of the column.

In recent years, the output of wind turbine devices applied to wind turbine generators has been increasing rapidly, but there are restrictions on the installation area and the installation location for obtaining high wind speed on land (ground). Because of this, it is expanding to the ocean. In Europe, stationary offshore wind turbines are installed, but there is not enough area for installation of bottomed top wind turbines in coastal areas where the water depth increases drastically as in Japan, so floating offshore wind turbines are considered. Has been.
Since the offshore wind turbine device can obtain a higher wind speed than a wind turbine device installed on land (ground), the power generation amount of the wind turbine power generation is increased, and the wind speed fluctuation depending on the time zone is small. There are many advantages such as higher utilization factor of equipment and less influence on fatigue strength, and extremely few problems on the boundary of the living environment in noise and landscape.

As an example of such an offshore wind turbine apparatus, a technique disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2003-252288) is provided.
In the technology of Patent Document 1, a floating body-type foundation structure for standingly supporting a windmill power generator on the ocean is provided, and the foundation structure surrounds the main float and a main float that is long in the vertical direction. A plurality of sub-floating bodies provided integrally with the main floating body in a truss shape, and a horizontal plate having a diameter larger than the cross section of the main floating body is installed horizontally at the draft portion below the draft line of the main floating body, Even in the offshore where the offshore wind speed increases without being affected by the water depth, it is possible to suppress the same of the entire device due to the influence of wave external force or wind external force.

JP 2003-252288 A

In the offshore wind turbine device provided for the purpose of increasing the output, the outer diameter of the wing is configured to be large, so that the nacelle that houses the wind turbine and a rotating device such as a generator driven to rotate by the wind turbine is also large and large. It becomes weight. For this reason, the driving force of the yaw control for following and controlling the large and heavy blades and nacelles in the wind direction inevitably requires a large driving force, and the yaw control driving system becomes large and expensive.
Further, in the yaw control, the connecting portion between the upper end of the long column and the heavy nacelle is relatively rotated, so that the operating force applied to the connecting portion is increased and the connecting portion is damaged due to an excessive load. There is a fear.

In addition, in such a conventional offshore wind turbine device, since a support column is erected vertically on the floating body, and the nacelle is connected via a connecting portion provided with a yaw control system on the support column. The vertical vibration acting on the floating body acts directly on the nacelle side through the support column, and the connection portion is likely to be damaged by the vibration.
Furthermore, in such a conventional offshore wind turbine device, the outer diameter of the wing is configured to be large in order to obtain a large output. However, since the support pillar is erected vertically on the floating body, the large diameter, large The tip part easily interferes with the support post due to the deflection of the wing formed in the weight, and if the overhang amount from the nacelle of the wing is increased for the purpose of preventing such interference, the total length of the wind turbine upper part (nacelle mounting part) becomes longer. As the wind turbine becomes larger and the amount of overhang from the nacelle of the blades becomes larger, the bending load of the connecting portion becomes excessive and it becomes easy to induce breakage of the connecting portion.
And so on.

  In view of the problems of the prior art, the present invention enables yaw control of the entire wind turbine device in an offshore wind turbine device, and does not require yaw control at the connecting portion between the support column and the nacelle. An object of the present invention is to provide a wind turbine device that improves the durability of the wind turbine device by reducing the load on the connecting portion of the wind turbine, and further enables the blade to have a large diameter and high output while avoiding interference between the prop and the blade. And

The present invention achieves such an object, and a wind turbine in which a prop is erected on a floating body floated on the ocean and a rotational force is generated by wind force acting on a plurality of wings, and a generator driven to rotate by the wind turbine. In a wind turbine device configured to support a nacelle containing a rotating device such as a top of the support, a propulsion unit attached to the bottom of the floating body and propelling the floating body, and steering the propulsion device A steering device that changes a direction of the floating body; and a control device that controls the steering device according to a wind direction of an air flow acting on the blades, and the control device controls the steering device according to the wind direction to control the steering device. together formed by constituting the floating direction as allowed to changes following the wind direction, the struts et provided inclined to the lower side than the upper side for supporting the nacelle on the top is located downstream of the air flow Further attaching an auxiliary wing allowed to generate a lift direction of suppressing the lateral loads including bending load of the strut by the air flow in the air flow downstream of the strut, the strut and the cross-sectional shape of the ailerons the air flow is formed in a wing-like profile so allowed to generate lift, said ailerons one or are several attached along the longitudinal direction of the struts on the air flow downstream of the struts, fitted with the aileron assisted An auxiliary wing drive device is provided that reversibly rotates the wing drive shaft around its axis to change its direction.

  According to such an invention, in the wind turbine device configured to support the nacelle in which the prop is erected on the floating body and the rotating device is accommodated on the upper portion of the prop, a plurality of propulsion devices are attached to the bottom of the floating body, The propulsion unit is configured to be able to integrally propel the floating body and the windmill device, the propulsion unit is steered by the steering device to change the orientation of the floating body, and the air flow acting on the blades by the control unit By changing the direction of the floating body in accordance with the wind direction of (wind), yaw control that follows the wind direction can be performed on the floating body and the entire windmill device mounted on the floating body.

  Therefore, according to this invention, the steering device can be used to steer a plurality of propulsion devices, and the direction of the floating body floating on the ocean can be made to follow the wind direction so that the yaw control can be performed. Even if the wind turbine device has a large output, yaw control can be easily performed without requiring a particularly large driving force, and it is unnecessary to provide a drive system for yaw control in the wind turbine device as in the prior art. As a result, it is possible to suppress the increase in size and cost of the wind turbine device, and it is not necessary to provide a yaw control mechanism at the connection portion between the upper end of the long pillar and the heavy nacelle as in the prior art, so the connection due to excessive load The damage of the windmill device can be improved and the durability and reliability of the windmill device can be improved.

Preferably, in this invention, an anemometer that measures the wind direction of the airflow (wind) acting on the blade and inputs the wind direction to the control device is provided, and the control device operates the steering device with respect to a preset wind direction. A target value in a direction and a measured value of the wind direction from the anemometer are compared, and the steering device is controlled based on the comparison result, so that the wind turbine device corresponds to the measured value of the wind direction through the floating body. Configured to adjust in direction.
According to this configuration, the steering device is controlled using the measurement value of the wind direction by the anemometer, so that the floating body and the windmill device can be steered accurately following the wind direction, and the yaw of the floating body and the windmill device can be controlled. The control accuracy of the control can be increased.

In the invention, preferably, the propulsion device includes a variable speed drive device that controls a propulsion speed, and the control device performs both speed control of the drive device and steering control of the steering device based on the wind direction. Configured.
If comprised in this way, the speed control of several propulsion units can be performed simultaneously with the steering control using the measured value of a wind direction by a control apparatus, and the speed of several propulsion units can be changed freely The steering controllability can be further improved.

Further, according to the present invention , an auxiliary wing that generates lift in a direction that suppresses a lateral load including a bending load of the column due to the air flow is attached to the downstream side of the air flow of the column, and the cross-sectional shapes of the column and the auxiliary wing are The airflow is formed in a wing-like profile so as to generate lift, and one or a plurality of the auxiliary wings are attached to the downstream side of the airflow of the support along the longitudinal direction of the support. An auxiliary wing drive device is provided that reversibly rotates the attached auxiliary wing drive shaft around its axis and changes its orientation.
Further, in this invention, an anemometer for measuring a wind direction of an air flow (wind) acting on the column, and a measurement value of the wind direction is input from the anemometer, and the auxiliary blade driving device is controlled according to the measurement value of the wind direction. And an auxiliary wing controller for controlling the direction of the auxiliary wing.

According to this invention, the auxiliary wing for generating lift in a direction to suppress the lateral load including the bending load of the column due to the airflow is attached to the downstream side of the column in the airflow, and the cross-sectional shapes of the column and the auxiliary wing Is formed in a wing-like profile so that lift is generated by the air flow, and one or a plurality of auxiliary wings are provided on the downstream side of the air flow (wind) of the support via the auxiliary wing drive shaft in the longitudinal direction of the support. Attaching and controlling the direction of the auxiliary wing by controlling the auxiliary wing controller using the measured value of the air flow (wind) from the anemometer, and suppressing the bending load acting on the column by the air flow (wind). By adjusting so as to generate lift in the direction, it is possible to reduce the load from the lateral direction including the bending load of the column due to the air flow (wind). Furthermore, since the load acting on the wind turbine is supported by the mooring force, it is necessary for the load acting on the mooring device or the propulsion unit to reduce the load with respect to the unexpected lateral load. Output can also be reduced.
Accordingly, the section modulus of the support can be reduced to reduce the weight of the support, and the specification of the mooring device that supports the entire floating body can be suppressed. Steering performance is improved by reducing the resistance of the strut due to airflow (wind).

In this invention, a plurality of the auxiliary blades provided in the longitudinal direction of the support column can be formed in a profile having the same shape.
If comprised in this way, the manufacturing cost of an auxiliary wing can be reduced by forming several auxiliary wings in the profile of the same shape.

Moreover, in this invention, the said auxiliary wing provided with two or more in the longitudinal direction of the said support | pillar can also form each auxiliary wing in the profile of a different shape.
With this configuration, by changing the size of the auxiliary wing in the longitudinal direction of the column, the lift generated on the auxiliary wing by the air flow (wind) is adjusted, and the bending load acting on the column, and further the mooring The force or the output of the propulsion device can be suppressed to the minimum value.

Further, the present invention is characterized in that the support column is provided so as to be inclined so that the lower side is located downstream of the air flow from the upper side supporting the nacelle at the upper side.
In this invention, it is preferable that the support column is inclined in a straight line with respect to the vertical line, and the inclination angle is 5 ° to 20 °.

According to such an invention, the support is tilted with respect to the vertical line so that the lower side is positioned downstream of the air flow (wind) rather than the upper side, thereby flexibly making the blade contact with the support due to the inclination. In addition, the vertical vibration from the floating body or the like can be attenuated by the elastic support by the spring action of the inclined column and the vertical vibration can be reduced, and damage on the nacelle side due to the vertical vibration can be avoided.
In addition, since the prop is inclined to the downstream side of the air flow (wind) with respect to the wing and is separated from the wing, even if the outer diameter of the wing is increased, the tip of the wing is supported by the deflection of the wing. Therefore, it is possible to easily increase the output of the wind turbine by making the outer diameter of the blade large.

Moreover, in this invention, the said support | pillar can be comprised in the concave-curved support | pillar with the height direction intermediate part curved in the downstream direction.
With this configuration, the flexibility of bending with respect to vertical vibration is increased, the natural frequency of the column is lowered, the damping effect due to the spring action of the column is increased, and transmission of the vertical vibration to the nacelle side is further suppressed. Is done.

Moreover, in this invention, the said support | pillar can also be comprised in the convex-curved support | pillar with the height direction intermediate part curved in the upstream direction.
If configured in this way, the rigidity against vertical vibration is increased compared to the concavely curved support column, and even if the nacelle side is heavy, it can be firmly supported by the convexly curved support column and set according to the required natural frequency. Is possible.

  According to the present invention, it is possible to perform yaw control by steering a plurality of propulsion devices with a steering device and causing the direction of the floating body floating on the ocean to follow the wind direction, so that the outer diameter of the wing increases. Therefore, even if the output of the windmill device is increased, yaw control can be easily performed without requiring a particularly large driving force, and it becomes unnecessary to provide a drive system for yaw control in the windmill device as in the prior art. Therefore, it is possible to suppress the increase in the size and cost of the windmill device, and it is not necessary to provide a yaw control mechanism at the connection portion between the upper end of the long pillar and the heavy nacelle as in the prior art. The damage and reliability of the windmill device can be improved.

Further, according to the present invention, one auxiliary blade or a plurality of auxiliary blades are attached in the longitudinal direction of the column via the auxiliary blade driving shaft on the downstream side of the air flow (wind) of the column, and the auxiliary blade is driven by the auxiliary blade driving device. The direction of
By adjusting the auxiliary wing controller using the measured value of the air flow (wind) from the anemometer, the lift is adjusted so as to generate a lift force in a direction to suppress the bending load acting on the support column by the air flow (wind). Thereby, the bending load of the support | pillar by an air flow (wind), the mooring force of a floating body, or the output of a propulsion device can be reduced.
Thereby, the section modulus of the support can be reduced to reduce the weight of the support, and the resistance of the support due to the air flow (wind) can be reduced to improve the steering performance.

Further, according to the present invention, by tilting the support column with respect to the vertical line, the deflection of the wing can be absorbed by the flexibility of the inclined support column, and the vertical vibration from the floating body etc. can be absorbed by the spring action of the inclined support column. Attenuation by the support and transmission to the nacelle side can be suppressed, and damage on the nacelle side due to such vertical vibration can be avoided.
In addition, since the prop is inclined to the downstream side of the air flow (wind) with respect to the wing and is separated from the wing, even if the outer diameter of the wing is increased, the tip of the wing is supported by the deflection of the wing. Therefore, it is possible to easily increase the output of the wind turbine by making the outer diameter of the blade large.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

  FIG. 1 is a schematic side view showing the overall structure of an offshore wind turbine apparatus according to a first embodiment of the present invention. FIG. 2 is a control block diagram in the first embodiment. FIG. 3 is a view corresponding to FIG. 1 showing the second embodiment. 4 is an enlarged view of a portion Z in FIG. 3, and FIG. 5 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a schematic side view of a windmill device showing a third embodiment, and FIG. 7 is a schematic side view of the windmill device showing a fourth embodiment.

In FIG. 1 showing the first embodiment of the present invention, reference numeral 103 denotes a floating body floated on the ocean (104 is the sea surface), and a column 1 is erected on the base surface of the floating body 103. Reference numeral 100 denotes a windmill that generates a rotational force by wind force acting on a plurality of blades 101, and reference numeral 102 denotes a nacelle that houses a rotating device such as a generator that is rotationally driven by the windmill 100. Since the structure of the windmill 100 is known, a detailed description of the structure is omitted.
A nacelle 102 of the windmill 100 is fixed to the upper portion of the support 1. In this case, the yaw control device is not interposed between the upper portion of the support column 1 and the nacelle 102 as in the conventional wind turbine device, and both are directly fixed.

  The support column 1 is linear with a constant inclination angle α with respect to the vertical line so that the lower side attached to the floating body 103 is located downstream of the air flow (wind) rather than the upper side connected to the nacelle 102. It is inclined and is erected on the base surface of the floating body 103. The inclination angle α is preferably 5 ° to 20 ° from the grounds described later. In this embodiment, the support column 1 may be erected perpendicularly to the base surface of the floating body 103 as in the prior art.

Reference numeral 2 denotes a plurality of propulsion devices for propelling the floating body 103, which are attached to four locations (a plurality of locations may be sufficient) near the outer periphery of the bottom of the floating body 103. The propulsion unit 2 propels the floating body 103 by the rotation of the propeller 4 that is directly connected to the propulsion unit drive motor 3.
Reference numeral 5 denotes a propulsion device steering device, which is provided for each of the propulsion devices 2, and the propulsion device 2 is attached to the lower portion. And the direction of the said propelling device 2 is changed by rotating this propelling device steering apparatus 5, Furthermore, the direction of the floating body 103 is changed.
Reference numeral 7 denotes an anemometer that measures the wind direction of an air flow (wind) acting on the blade 101. Reference numeral 6 denotes a propulsion unit controller, which performs an operation to be described later based on a wind direction measurement value input from the anemometer 7 to control the propulsion unit steering device 5 and the propulsion unit drive motor 3, thereby the floating body 103 and the windmill 100. Is changed to follow the wind direction.

Next, the operation of the first embodiment will be described with reference to FIG.
The measured value of the wind direction of the air flow (wind) to the blades 101 from the anemometer 7 is input to the wind direction calculation unit 61 of the propulsion device controller 6. A steering direction setting unit 62 is a relationship between the wind direction of the air flow (wind) to the blades 101 and the steering directions of a plurality of (four in this example) propellers 2, that is, the target steering direction with respect to the wind direction The rotation speed of the propulsion device drive motor 3 in the plurality of propulsion devices 2 is set.
In the wind direction calculation unit 61, the measured value of the wind direction from the anemometer 7 is matched with the target steering direction and the motor rotation number, and the steering direction and each of the propulsion devices 2 corresponding to the measured value of the wind direction are matched. The motor rotation number in the propulsion device 2 is calculated and input to the steering device control unit 64 and the motor rotation control unit 63.

The steering device control unit 64 obtains a correction operation amount from the current steering direction of each propulsion unit 2 based on the steering direction calculation value from the wind direction calculation unit 61, that is, the steering angle calculation value, and the propulsion unit control unit 64 Output to the direction device 5. Further, the motor rotation control unit 63 obtains a correction amount from the current value of the motor rotation number of each propulsion unit 2 based on the motor rotation number calculation value from the wind direction calculation unit 61 and outputs it to the propulsion unit drive motor 3. .
Thereby, the propulsion device steering device 5 corrects the steering direction of each propeller 2 by the correction operation amount, and the rotation speed of each propulsion device drive motor 3 is corrected by the rotation speed correction amount. Therefore, each propulsion unit 2 is operated with the steering direction and the motor rotation speed corresponding to the measurement value of the wind direction, and the floating body 103 is directed in the direction following the wind direction by the operation of each propulsion unit 2. Controlled, the direction of the windmill 100 is adjusted to a direction adapted to the wind direction.

  According to the first embodiment, a plurality of propulsion devices 2 are attached to the bottom of the floating body 103 so that the floating body 103 and the windmill 100 can be integrally propelled by the propulsion device 2. The direction of the floating body 103 is changed by steering by the propelling device steering device 5, and the direction of the floating body 103 is changed by following the wind direction of the air flow (wind) acting on the blade 101 by the propelling device controller 6. By controlling so that the floating body 103 can be damped, yaw control can be performed in which the floating body 103 and the entire windmill device placed on the floating body 103 follow the wind direction.

Therefore, according to the first embodiment, yaw control can be performed by manipulating the plurality of propulsion devices 2 by the propulsion device steering device 5 so that the direction of the floating body 103 floating on the ocean follows the wind direction. Therefore, even if the outer diameter of the blade 101 is increased and the wind turbine 100 is increased in output, yaw control can be easily performed without requiring a particularly large driving force, and the wind turbine 100 can be controlled by yaw as in the prior art. It becomes unnecessary to provide the drive system.
As a result, the wind turbine 100 can be prevented from becoming large and expensive, and it is not necessary to provide a yaw control mechanism at the connecting portion between the upper end of the long strut and the heavy nacelle as in the prior art. Breakage of the connecting portion can be avoided.

Further, since the propulsion device steering device 5 is controlled using the measurement value of the wind direction by the anemometer 7, the floating body 103 and the windmill 100 can be steered accurately following the wind direction, and the floating body 103 and the windmill 100 can be steered. The control accuracy of yaw control can be improved.
Furthermore, since the propulsion unit controller 6 can perform the motor rotation speed control of the plurality of propulsion units 2 simultaneously with the steering control using the measurement value of the wind direction, the speed of the plurality of propulsion units 2 can be freely set. Further improvement of steering controllability can be realized by changing the distance.

In the second embodiment shown in FIG. 3 to FIG. 6, the support column 1 is arranged such that the lower side attached to the floating body 103 is located downstream of the air flow (wind) rather than the upper side connected to the nacelle 102. The upstream surface 1a and the downstream surface 1b are inclined in a straight line so that the upstream surface 1a has a constant inclination angle α with respect to the vertical line, and is erected on the base surface of the floating body 103. The inclination angle α is preferably 5 ° to 20 ° from the grounds described later.
If the inclination angle α is less than 5 °, the blade 101 and the support 1 may interfere with each other when the deflection of the blade 101 is increased. If the inclination angle α exceeds 20 °, the support 1 may be bent due to the inclination. Occurs and the support rigidity of the support column 1 is lowered.
As described above, the strut 1 is inclined straight at an inclination angle α with respect to the vertical line so that the lower side is positioned downstream of the air flow (wind) rather than the upper side, so that the deflection of the blade 101 is reduced. It is possible to flexibly avoid contact with the support column 1 due to the inclination of 1 and to attenuate the vertical vibration from the floating body 103 by the elastic support by the spring action of the inclined support column 1 to absorb the vibration caused by the vertical vibration. Thus, damage on the nacelle 102 side due to such vertical vibration can be avoided.
Further, since the support column 1 is inclined to the downstream side of the airflow (wind) with respect to the blade 101 so as to be separated from the blade 101, even if the outer diameter of the blade 101 is increased, the deflection of the blade 101 is increased. As a result, the tip of the blade does not come into contact with the support 1, and it is possible to easily increase the output of the wind turbine 100 by making the blade 101 large.

Reference numeral 11 denotes an auxiliary wing, which is provided on the support column 1 along the longitudinal direction of the support column 1 (one or more may be provided). The auxiliary wing 11 is fixed to an auxiliary wing drive shaft 11 extending in parallel with the support column 1 on the downstream side of the air flow (wind) of the support column 1. As shown in FIG. 5, the cross-sectional shapes of the support column 1 and the auxiliary wings 11 include a wing-like profile that generates lift F by an air flow, that is, a lateral load including bending load of the support column 1 due to an air flow (wind). It is formed in a profile that generates a lift F in a direction to suppress the directional load.
Further, the auxiliary wing 11 is configured to be reversibly rotated around the auxiliary wing drive shaft 12 by a rotation angle θ by the rotation of the auxiliary wing drive shaft 12 so that the direction thereof can be changed. Reference numeral 12a denotes an upper bearing of the auxiliary blade drive shaft 12, and the upper bearing 12a rotatably supports the upper portion of the auxiliary blade drive shaft 12 on the support column 1.

  FIG. 4 shows a drive unit and a lower support structure of the auxiliary blade drive shaft 12, and reference numeral 23 denotes a lower bearing that rotatably supports the lower portion of the auxiliary blade drive shaft 12 on the column 1. Reference numeral 21 denotes an auxiliary blade drive motor that rotationally drives the auxiliary blade drive shaft 12 and is configured by a reversible stepping motor. Reference numeral 22 denotes a gear reduction section device, and the reversible rotation of the drive motor 21 is decelerated by the gear reduction section device 22 and transmitted to the auxiliary blade drive shaft 12.

Reference numeral 7 denotes an anemometer that measures the wind direction of an air flow (wind) acting on the blade 101. Reference numeral 10 denotes an auxiliary wing controller that receives the measurement value of the wind direction from the anemometer 7 and controls the direction of the auxiliary wing 11 by the auxiliary wing drive motor 21 constituting the auxiliary wing drive device according to the measurement value of the wind direction. It is.
That is, when the wind direction measurement value of the airflow (wind) is input to the auxiliary blade controller 10 by the anemometer 7, the auxiliary blade controller 10 uses the auxiliary blade drive shaft 12 and the auxiliary blade 11 corresponding to the wind direction. And the auxiliary wing drive motor 21 is driven to the position of the chain line in FIG. 5 so that the auxiliary wing drive shaft 12 and the auxiliary wing 11 are at the rotation angle θ.
Accordingly, for example, as shown in FIG. 5, when the air flow enters obliquely below the support column 1, the upper side of the auxiliary wing 11 in FIG. 5 is driven by the rotation angle θ up to the chain line position of the auxiliary wing 11. Lifting force F is generated due to a decrease in the air flow velocity, and the lateral load including the bending load due to the air flow of the column 1 is canceled by a certain amount.

Therefore, according to the second embodiment, one or a plurality of auxiliary blades 11 are attached to the downstream side of the airflow (wind) of the support column 1 via the auxiliary blade drive shaft 12 in the longitudinal direction of the support column 1, The direction of the auxiliary wing 11 includes a bending load acting on the support column 1 by the air flow (wind) by the control of the auxiliary wing controller 10 using the measured value of the air direction (wind) from the anemometer 7. By adjusting so as to generate the lift F in the direction to suppress the lateral load, the lateral load including the bending load of the column 1 due to the air flow (wind) can be reduced.
Thereby, the resistance of the support column 1 due to the air flow (wind) can be reduced and the steering performance is improved, and the bending stress of the support column 1 can be reduced, the mooring force can be reduced, and the propulsion output can be reduced.

In the second embodiment, if a plurality of the auxiliary wings 11 provided in the longitudinal direction of the support column 1 are formed in the same profile, the plurality of auxiliary wings 11 can be constituted by the same member. 11 production costs can be reduced.
Further, when the plurality of auxiliary blades 11 are formed in profiles having different shapes, the size of the auxiliary blades 11 is changed in the longitudinal direction of the support column 1, thereby causing an air flow (wind). By adjusting the lift F generated in the auxiliary wing 11, the lateral load including the bending load acting on the support 1 can be suppressed to the minimum value.

In the second embodiment, reference numeral 2 denotes a plurality of propulsion devices for propelling the floating body 103, which are attached to four locations (may be a plurality of locations) near the outer periphery of the bottom of the floating body 103. The propulsion unit 2 propels the floating body 103 by the rotation of the propeller 4 that is directly connected to the propulsion unit drive motor 3.
Reference numeral 5 denotes a propulsion device steering device, which is provided for each of the propulsion devices 2, and the propulsion device 2 is attached to the lower portion. And the direction of the said propelling device 2 is changed by rotating this propelling device steering apparatus 5, Furthermore, the direction of the floating body 103 is changed.
The configurations of the propulsion device 2 and the propelling device steering device 5 described above are the same as those in the first embodiment.

In the third embodiment shown in FIG. 6, the support column 1 has the upstream surface 1a and the downstream surface 1b at the intermediate portion in the height direction curved in the downstream direction of the air flow (between the upper and lower portions of the upstream surface 1a). It is configured as a concavely curved support column on the upstream side.
If comprised in this way, the bending | flexion flexibility with respect to a vertical vibration becomes large, can absorb the fluctuation of a perpendicular direction, and the transmission to the nacelle 102 side of this vertical vibration is further suppressed rather than the said 2nd Example.

In the fourth embodiment shown in FIG. 7, the support column 1 has an upstream surface 1a and a downstream surface 1b in the middle in the height direction curved in the upstream direction of the air flow (between the upper and lower portions of the upstream surface 1a). Is shifted by A) and is formed as a convex support column on the upstream side.
If comprised in this way, the rigidity with respect to a vertical vibration will become large, and even if the nacelle 102 side is heavy weight, it can be supported firmly by a convex-curved support | pillar.
6 to 7, the same members as those in the first and second embodiments are denoted by the same reference numerals.
The second to fourth embodiments can be applied to wind turbine apparatuses installed on land.

1 is a schematic side view showing an overall structure of an offshore wind turbine apparatus according to a first embodiment of the present invention. FIG. 3 is a control block diagram in the first embodiment. It is a figure corresponding to FIG. 1 which shows 2nd Example. It is the Z section enlarged view of FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a schematic side view of the windmill apparatus which shows 3rd Example. It is a schematic side view of the windmill apparatus which shows 4th Example.

DESCRIPTION OF SYMBOLS 1 support | pillar 2 propulsion device 3 propulsion device drive motor 5 propulsion device steering apparatus 6 propulsion device controller 7 anemometer 10 auxiliary wing controller 11 auxiliary wing 12 auxiliary wing drive shaft 21 auxiliary wing drive motor 100 wind turbine 101 wing 102 nacelle 103 floating body

Claims (9)

A prop is installed on a floating body that is floated on the ocean, and a nacelle that houses a wind turbine that generates rotational force by wind power acting on a plurality of blades and a rotating device such as a generator that is driven to rotate by the wind turbine. In the wind turbine device configured to support the upper part of the
The propulsion device attached to the bottom of the floating body to propel the floating body, the steering device that steers the propulsion device to change the direction of the floating body, and the steering by the wind direction of the airflow acting on the blades A control device for controlling the device, the control device is configured to control the steering device according to the wind direction to change the direction of the floating body following the wind direction, and
The support column is provided so as to be inclined so that the lower side is positioned downstream of the air flow from the upper side supporting the nacelle on the upper side, and further , a direction in which a lateral load including a bending load of the support column due to the air flow is suppressed. An auxiliary wing that generates a lift is attached to the downstream side of the airflow of the column, and the cross-sectional shape of the column and the auxiliary wing is formed into a wing-like profile so as to generate a lift by the airflow. One or more attached along the longitudinal direction of the support column on the downstream side of the air flow of the support column, and the auxiliary blade drive shaft to which the auxiliary blade is attached rotates reversibly around the axis to change its direction. A windmill device provided with a blade driving device.   An anemometer that measures a wind direction of an air flow acting on the blade and inputs the measured wind direction to the control device, the control device includes a target value of the steering direction of the steering device with respect to a preset wind direction and the anemometer It is configured to adjust the wind turbine in a direction corresponding to the wind direction measurement value via the floating body by comparing the measurement value of the wind direction from the wind and controlling the steering device based on the comparison result. The wind turbine apparatus according to claim 1.   The propulsion device includes a variable speed driving device that controls a propulsion speed, and the control device is configured to perform both speed control of the driving device and steering control of the steering device based on the wind direction. The windmill device according to claim 1. The wind turbine apparatus according to claim 3, wherein a plurality of the auxiliary blades provided in the longitudinal direction of the support are formed in a profile having the same shape . The wind turbine apparatus according to claim 3, wherein a plurality of the auxiliary blades provided in the longitudinal direction of the support column are formed in profiles having different shapes . An anemometer that measures the wind direction of the airflow acting on the support, and the wind direction measurement value is input from the anemometer, and the direction of the auxiliary blade is controlled via the auxiliary blade driving device according to the wind direction measurement value The wind turbine apparatus according to claim 1, further comprising an auxiliary wing controller . The wind turbine apparatus according to claim 1, wherein the support column is inclined in a straight line with respect to a vertical line, and an inclination angle is set to 5 ° to 20 ° . The wind turbine apparatus according to claim 1, wherein the strut is configured as a concavely-curved strut whose middle portion in the height direction is curved in the downstream direction . The wind turbine apparatus according to claim 1, wherein the strut is configured as a convexly-curved strut whose middle portion in the height direction is curved in the upstream direction .

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