WO2007105260A1

WO2007105260A1 - Wind-driven power generator and construction method for the same

Info

Publication number: WO2007105260A1
Application number: PCT/JP2006/304545
Authority: WO
Inventors: Shoichi Tanaka
Original assignee: Shoichi Tanaka
Priority date: 2006-03-02
Filing date: 2006-03-02
Publication date: 2007-09-20

Abstract

A lifting device (3) is placed at the upper end of a tower (1) so as to be horizontally rotatable, and the lifting device (3) lifts and lowers a wind-driven power generation unit (4). This increases safety of the wind-driven power generation unit (4) in strong wind and facilitates maintenance. Also, a rotating member (6) having a fish shape cross-section and rotating horizontally by wind is attached to the tower (1), and this reduces overturning moment on the tower (1).

Description

Specification

Wind power generation apparatus and construction method thereof

The present invention relates to a wind turbine generator, and more particularly to a wind turbine generator excellent in wind resistance performance and economy. Technical background

High-power wind turbines are known to be more economical than constructing multiple small-power wind turbines. In addition, a high-power wind power generator has the important advantage of being able to increase the output per unit ground area because it can use upper winds than a small-power wind power generator. However, increasing the output of the wind turbine generator requires an increase in the propeller radius, so it is necessary to construct a tower of more than 100 meters, more preferably 150 meters. In such a large-power wind turbine generator with a large tower and a large propeller, the strong wind resistance measures constitute a major part of the construction cost. Even if a very large typhoon occurs only once every few decades, there is a possibility that it will occur within a few years. Therefore, it is necessary to take into account strong winds of 8 ◦ m or more due to super-large typhoons in the construction of wind turbine towers and propeller production. Techniques in the following literature have been proposed for solving this problem.

Patent Document 1 Japanese Patent Laid-Open No. 2 0 0 3— 4 9 7 6 1

Patent Document 2 Japanese Patent Laid-Open No. 2 0 0 2— 1 4 7 3 3 5

In Patent Document 1, in a horizontal axis type wind power generator in which a wind turbine and a generator are arranged at the top of a columnar tower, a Karman vortex generated in the wake region of the columnar tower causes the tower to vibrate. In order to prevent this, it is proposed that a cylindrical member is rotatably fitted to the tower, and a plate is projected from the outer peripheral surface of the cylindrical member to the boundary layer separation region. Since this plate protrudes toward the boundary layer separation region that occurs in the vicinity of the downstream side of the outer peripheral surface of the cylindrical member, the vortex generated in this boundary layer separation region propagates and develops, causing the tower to vibrate. Is prevented. In Patent Document 2, the force that inclines the tower from its root in a strong wind, and the wind force acting on the tower can be reduced by defeating it. Propose to reduce.

However, since the plate of Patent Document 1 protrudes radially outward from the outer peripheral surface of the plate, it may be expected to have an effect of suppressing the development of Karman vortices. Increases the total drag that acts on In addition, the plate itself may cause separation of the boundary layer and turbulence. As a result, it is difficult to expect the effect of reducing the collapse moment (wind drag moment) due to the total drag. Next, tilting or tilting the tower from its root during strong winds proposed in Patent Document 2 has a problem that it is difficult to increase the size of the tower because of the wind resistance acting on the pivot point of the tower. Was. In addition, the problem that a large space is required around the tower, the problem that the tower tilting mechanism becomes large and complicated, and the problem that the tilting operation of the tower under strong wind is dangerous are derived,

It is possible to increase the strength of each member such as a table if the cost is increased. However, since there is a certain limit to the amount of power produced by wind power, it is very important to reduce construction costs and maintenance costs in the wind power generation equipment business. To explain further, in consideration of maintenance costs and land rents, it is necessary to cancel construction costs at least about 10 years after construction. In other words, the construction cost including the tower construction cost and the wind power generation unit installation cost must be less than 10 times the annual power production and sales volume, and the total construction cost is 5 times the annual power production and sales volume. Should be less than, and more preferably less than 2 times. An increase in the weight of the tower directly leads to an increase in tower construction costs, including basic construction costs, tower transportation costs, and tower startup costs. Similarly, reducing maintenance costs is also very important, but in the past, propellers have been prevented from fatigue failure due to wind resistance (proper component generated in propellers against wind power) applied to the propellers in strong winds. Therefore, periodic replacement and inspection of the propellers was important. However, high-place work such as inspection and replacement of the wind power generation unit fixed at the top of the tower is extremely dangerous, and maintenance costs have increased accordingly. Disclosure of the invention

The present invention has been made in view of the above problems, and is a wind excellent in economic efficiency and wind resistance. Its purpose is to provide a power generator.

The wind power generation apparatus of each invention described below includes a propeller, a wind power generation unit including a power generator driven by the propeller, and a columnar tower that supports the wind power generation unit. Applies to wind power generators. This type of wind turbine generator is known as a horizontal axis wind turbine generator.

The wind turbine generator according to the first aspect of the invention has a fish-shaped cross-section rotating member that has a streamline shape substantially equal to a shape of a fish viewed from above and is rotatably held by the table. It is said. A fish-shaped cross-section rotating member refers to a shape in which fluid resistance is substantially minimum in an air flow. The horizontal cross-sectional shape of the fish-shaped cross-section rotating member has a substantially symmetrical shape with the middle line in the thickness direction as the center. This fish-shaped cross-section rotating member has a shape approximately equal to the shape of two plane wings combined. However, unlike an airplane wing, an increase in lift is not necessary, so a shape with a minimum drag is preferred. Preferably, the thickness of the fish-shaped cross-section rotating member increases continuously in the accelerated pressure reduction region from the wind upper end to the center point of the substantially cylindrical tower, and from the center point of the table to the wind lower end. It is preferable to decrease continuously in the deceleration pressure increase region. Of the length from the windward end to the windward end of the fish-shaped cross-section rotating member, the distance from the windward end to the center point of the tower, that is, the length of the accelerated depressurization region, is the distance from the tower center point to the windward end. It is preferable that the distance is shorter than the length of the deceleration pressure increasing region. This is a speed-increasing and depressurizing region in which the former is unlikely to cause boundary layer separation, but the latter is a decelerating and pressure increasing region in which boundary layer separation is likely to occur, so the thickness reduction rate is reduced to suppress boundary layer separation. Because. It is preferable that the surface of the fish-shaped cross-sectional rotating member be smooth. Since the fish-shaped cross section provides a significant fluid resistance effect compared to a cylindrical member having the same cross-sectional area, the total amount of wind drag acting on the tower can be significantly reduced to, for example, less than a fraction. Since the tower bending moment required to prevent collapse during a typhoon should be larger than the wind-resistant momentum applied to each part of the tower, reducing the wind-resistant force reduces the tower construction cost by reducing the weight of the tower. This will improve economic efficiency. This means that wind power generators can be installed even at locations that have not been profitable so far, and large-scale, high-output wind power generators can be installed even in areas that are difficult to enlarge, such as typhoon passages. It means a great advantage in practical use. Note that the columnar tower can be made of, for example, a steel cylinder. The multi-pole tower may be a combination of multiple poles with a small cross-sectional area instead of a single column (or cylinder). In this case, the fish-shaped cross-section rotating member can be installed on each pole. In this case, the spacing between the poles where each fish-shaped cross section can be freely rotated should be secured. The fish-shaped cross-section rotating member that fits in the tower may be divided into a plurality of parts. For example, if you consider a 100 meter tower, you can place four fish-shaped rotary members, each about 20 meters high, in the 20 to 100 meter section of the tower. . Since the wind resistance acting on the tower is small near the ground, the effect of providing a fish-shaped cross-section rotating member is relatively small. In the above-described structure in which a plurality of fish-shaped cross-section rotating members are provided, the fish-shaped cross-section rotating member can be easily attached to and detached from the table. For example, first attach the first fish-shaped section rotating member to the lower part of the tower, lift it with a lifting member such as a mouthpiece, and attach the next fish-shaped section rotating member to the lower part of the table, By repeating this process, the fish-shaped cross-section rotating member can be installed up to the top of the tower. If the above process is reversed, each fish-shaped cross-section rotating member can be removed and inspected and replaced. This is also important in raising and lowering the wind power unit, which will be described later.

A wind turbine generator according to a second aspect of the present invention includes a base on which the wind generator unit is mounted and fitted to the table so as to be movable up and down, and a lift device that lifts and lowers the base. Yes. In this way, since the wind power generation unit can be lowered during strong winds, the bending moment applied to the tower can be reduced, so the tower construction cost can be reduced. Also, since the wind speed near the ground surface is relatively weak, it is possible to prevent propeller damage due to strong winds by lowering the wind power generation unit during a typhoon. In addition, the wind power unit installed at the top of the tower can be lowered and repaired on the ground, making it possible to work safely. Preferably, a two-blade type propeller is employed, and the two-blade type propeller is held horizontally when lowered. In this way, the wind power generation unit can be lowered almost to the ground level, making it easy to inspect and replace propellers and repair generators. To put in a shelter You can also. Preferably, the wind power generation unit can be automatically lowered based on wind speed and typhoon information.

It is preferable that the base includes a base having a cylindrical portion that is fitted to a columnar tower so as to be movable up and down, and a deck plate portion that protrudes from the cylindrical portion in a substantially horizontal direction. A wind power generation unit is fixed to the deck plate. In order to fix the base to the tower, it is preferable that a fixture hanging from the upper end of the tower and a fixture protruding upward from the base are joined by raising the base. Various known separable link mechanisms, such as train coupling mechanisms, can be employed for detachably coupling a pair of fasteners of this type.

The wind power unit can be raised or lowered by, for example, extending or shortening the wire that suspends the base. The expansion and contraction of the wire can be controlled by a winding device provided on the top or inside of the tower or on the ground. When the winding device is installed on the ground or inside the tower, a wire suspension roller that reverses the direction of the wire should be provided at the top of the tower. Such a lifting system is essentially the same as an elevator lifting system.

The power cable that connects the generator to the ground electrical equipment may be a power cable that is installed on the top surface of the tower and hangs from the structure that rotates with the wind power unit to the generator of the wind power unit. Is preferred. However, when the wind turbine unit is lowered for inspection and repair, it is preferable to separate the connection provided in the middle of the power cable.

When the fish-shaped cross-section rotating member is provided in the tower, it is preferable that the reinforcing wire and the power cable are arranged inside the fish-shaped cross-sectional rotating member. Preferably, the wind power generation unit is arranged on the windward side of the tower. In this case, the balance weight is arranged on the leeward side of the tower on the base on which the wind power generation unit is mounted. As a result, the weight of the wind turbine unit and the weight of the balance weight are balanced, making it easy to raise and lower the base. The balance weight can include the weight of the vertical tail located on the leeward side of the tower. This vertical tail is biased by the wind to maintain the propeller's swivel plane perpendicular to the wind direction. Of course, instead of the vertical tail, a wind power unit is installed based on an electrical signal indicating the wind direction. The base may be electrically driven.

A wind turbine generator according to a third aspect of the present invention includes a wind power detection device that detects whether or not the wind force exceeds a predetermined threshold value, and that when the wind force exceeds the threshold value, the rotating surface of the propeller is a wind direction. And a unit rotating device for rotating the wind power generation unit so as to be substantially parallel to each other. In this way, the cross-sectional area perpendicular to the wind direction of the propeller can be greatly reduced under strong winds such as when a typhoon is passing, greatly reducing the anti-bending moment acting on the propeller. can do. Therefore, it is possible to improve the durability of the propeller by reducing the wind resistance strength of the propeller. Preferably, the propeller is a two-blade type. In this way, when the propeller's rotating surface is substantially parallel to the wind direction under strong winds, the propeller is placed horizontally to further reduce the wind-resistance bending moment acting on the propeller. can do. Note that the horizontal rotation of the wind power generation unit may be performed by rotating a base that is mounted with the wind power generation unit and that extends horizontally around the tower. It may be fixed and the wind power unit on the base may be rotated horizontally.

A wind turbine generator according to a fourth aspect of the present invention includes an auxiliary wing that is disposed at an outer peripheral end of the propeller and generates lift in the centripetal direction of the propeller. In order to improve the economic efficiency of wind power generators, it is very important to generate electricity by rotating the propellers normally because the wind energy is large during strong winds. However, since the propeller rotation speed increases when the wind speed increases, there is a problem that a large centrifugal force acts on the propeller. Increasing the mass of the propeller to withstand this centrifugal force is limited because it increases the centrifugal force further. In the present invention, since the auxiliary wing is provided at the tip of the propeller and generates lift in the centripetal direction of the propeller, the centrifugal force of the propeller can be reduced by the lift of the auxiliary wing. However, the drag of the auxiliary wing increases the loss. However, this auxiliary wing can reduce the eddy current loss at the tip of the propeller, so that it can compensate for the increase in loss due to the resistance of the auxiliary wing. In addition, since the speed of the propeller tip is much higher than the wind speed, a significantly larger lift can be generated by a small auxiliary wing than the propeller. However, the mass of the aileron should be reduced as much as possible. According to a fifth aspect of the present invention, there is provided a wind power generator construction method comprising: a lift-up step of vertically lifting a cylinder of a predetermined length that forms a part of the cylinder; and a next cylinder directly below the cylinder from a lateral direction. The tower is constructed by repeating a shifting lateral shift step and a joining step of joining the upper end of the shifted cylinder to the lower end of the lifted cylinder. In this way, it is possible to construct a wind power generator much more easily than before, and it is possible to reduce the tower construction cost and increase the location where the wind power generator can be built. If a device or a wind power generation unit for raising and lowering the wind power generation unit is provided at the upper end of the uppermost cylinder forming the upper end of the tower, the installation process of the wind power generation unit and the like can be facilitated. Brief Description of Drawings

FIG. 1 is a schematic side view of a wind turbine generator according to an embodiment.

FIG. 2 is a schematic plan view of a fish-shaped cross-section rotating member.

FIG. 3 is a schematic horizontal cross-sectional view showing the main part of the fish-shaped cross-section rotating member. FIG. 4 is a schematic explanatory diagram showing the wind power unit and the vertical tail during strong winds.

In FIG. 5, (a) is a partial schematic front view showing the tip of the propeller during turning, and (b) is a schematic partial side view of the tip of the propeller 42 during turning in the circumferential direction. is there.

Figure 6 is a side view of the tower under construction.

FIG. 7 is a schematic partial plan view showing the main part of the tower support device.

Figure 8 is a side view of the tower under construction.

Figure 9 is a side view of the tower under construction.

Figure 10 is a side view of the tower under construction.

Figure 11 is a side view of the tower under construction.

In FIG. 12, (a) is a front view of the pedestal for supporting the tower during the construction of the tower, and (b) is a plan view of the pedestal for supporting the tower during the construction of the tower. BEST MODE FOR CARRYING OUT THE INVENTION

A preferred embodiment of the wind power generator utilizing each of the inventions described above will be described below. However, the present invention should not be construed as being limited to this embodiment, and may be realized by combining other technologies.

The wind turbine generator of this embodiment will be described with reference to a schematic side view thereof shown in FIG. The wind power generator according to this embodiment includes a column-shaped tower 1 standing vertically from the ground surface GL, a base 2 fitted to the tower 1 so as to be rotatable and movable up and down, and a lifting device that lifts and lowers the base 2 3, a wind power generation unit 4 fixed to the base 2, a vertical tail 5 fixed to the rear of the base 2, and a number of fish-shaped cross sections fitted to the tower 1 so as to be rotatable and movable up and down And a rotating member 6.

The height of Tower 1 is about 100 meters and its radius is about 3 meters. Tower 1 has a cylindrical structure, but the structure and construction method of Tower 1 will be described later. The base 2 includes a cylindrical part 21 fitted to the tower 1 and a flat deck plate part 2 2 extending in a horizontal direction from the cylindrical part 21. A wind power generation unit 4 is fixed to the front end of the deck plate portion 2 2, and a vertical tail 5 is fixed to the rear end of the deck plate portion 2 2. The lifting device 3 includes a horizontal rotating table 3 1 supported on the upper end of the tower 1 so as to be horizontally rotatable, a wire winding device 3 2, 3 3 fixed to the horizontal rotating table 3 1, and a horizontal rotating table. 3 1 and a cover 3 4 surrounding the wire hoisting devices 3 2 and 3 3, and a table driving device 3 5 embedded in the upper end of the tower 1. 3 6 is a rotating shaft of the horizontal rotating table 31.

The horizontal rotating table 31 is slowly rotated horizontally by the table driving device 35 below it. Since this type of table driving device incorporating a reduction motor is well known as a turntable driving mechanism, detailed description thereof is omitted. The wire winding devices 3 2 and 3 3 have a speed reduction motor Μ and a wire winding roller 3 2 1 driven by the motor Μ. The wire 3 2 2 hangs down from the wire winding roller 3 2 1, and the tip of the wire 3 2 2 is fixed to the wire fixing portion 2 2 1 at the upper end of the deck plate portion 2 2. The cover 3 4 has a force pouch part 3 4 1 surrounding the wire hoisting devices 3 2 and 3 3, and a cylindrical skirt part 3 4 2 hanging from the lower end of the capsule part 3 4 1 to surround the upper end part of the tower 1 have. The wind power generation unit 4 includes a generator 41 that is mounted and fixed at the front end of the deck plate portion 22, and a propeller 42 that is fixed to the front end of the rotating shaft of the generator 41. The generator 41 may be accommodated in the nacelle. Propeller 4 2 is a two-blade type. The vertical tail 5 is fixed to the rear end of the deck plate portion 2 2 so as to be horizontally rotatable and extends rearward from the deck plate portion 2 2. The vertical tail 5 is arranged vertically like the vertical tail 5 of the airplane. To rotate the vertical tail 5 horizontally, for example, a vertically extending tail support shaft (not shown) is fixed to the rear end of the deck plate section 2 2, and the vertical tail 5 is horizontally rotated about the tail support shaft. You can hold it freely.

A total of five fish-shaped cross-section rotating members 6 are arranged below the base 2. Each fish-shaped cross-section rotating member 6 has a streamline shape substantially equivalent to the shape of the fish viewed from above, and is rotatably held by the tower 1. The fish-shaped cross-section rotating member 6 has a height of about 20 meters, a horizontal length of about 10 meters, and a maximum thickness of about 3.2 meters. The upper end opening of each fish-shaped cross-section rotating member 6 is closed by the upper plate 61, and the lower end opening is closed by the lower plate 62. Thereby, the inside of each fish-shaped cross-section rotating member 6 is sealed. Yes.

Further details of the fish-shaped cross-section rotating member 6 will be described with reference to FIG. FIG. 2 is a schematic plan view of the fish-shaped cross-section rotating member 6. The fish-shaped cross-sectional rotating member 6 is formed by joining semi-fish-shaped cross-sectional rotating members 6 a and 6 b. The semi-fish-shaped cross-section rotating member 6 a and the semi-fish-shaped cross-section rotating member 6 b have a line-symmetric shape. The semi-fish-shaped cross-section rotating members 6a and 6b have semi-cylindrical grooves 6 2 0, respectively. By joining the semi-fish-shaped cross-section rotating members 6a and 6b, a pair of grooves 6 2 0 is a complete cylindrical hole. Tower 1 is fitted in this cylindrical hole. The fish-shaped cross-section rotating member 6 is configured by joining the semi-fish-shaped cross-section rotating members 6 a and 6 b in this way, so that the fish-shaped cross-section rotating member 6 can be easily attached to and detached from the tower 1. This is because.

FIG. 3 shows a schematic horizontal cross-sectional shape showing the main part of the fish-shaped cross-section rotating member 6. The fish-shaped cross-section rotating member 6 has six rollers 63. The upper and lower ends of each roller 63 are rotatably supported by the upper plate 61 and the lower plate 62. Two rollers 6 3 are arranged adjacent to the front of Tower 1, and four rollers 6 3 are arranged adjacent to the rear of Tower 1. Each roller 63 is in contact with the outer peripheral surface of the tower 1 to facilitate the horizontal rotation of the fish-shaped cross-section rotating member 6. The five fish-shaped cross-section rotating members 6 stacked one above the other have a lower plate and a lower fish-shaped cross-section so that they can be horizontally rotated independently of each other. The upper plate of the shape rotating member 6 may be contacted via a roller. The fish-shaped cross-section rotating member 6 has a streamline shape, that is, a shape in which two upper surfaces of airplane wings are combined. That is, the upstream portion of the fish-shaped cross-section rotating member 6 has a nozzle function for increasing and decreasing the air flow, and the middle and downstream portions of the fish-shaped cross-section rotating member 6 are diffusers that increase and decrease the air flow. It has a function. The thickness reduction of the downstream part and the downstream part of the fish-shaped cross-section rotating member 6 is gradually performed to prevent separation of the boundary layer. As a result, the fluid resistance of the fish-shaped cross-sectional rotating member 6 is substantially minimized.

Next, the operation of the wind turbine generator shown in FIGS. 1 to 3 will be described below. However, in the following description, the base 2 is fixed to the tower 1 at the upper end. The propeller 4 2 is rotated by the wind, and the generator 4 1 generates power. The generated power is sent through a power cable (not shown) to a horizontal rotation table 31 that rotates integrally with the base 2, and is sent to the ground from the horizontal rotation table 3 1 through a power cable in the tower 1. The vertical tail 5 is fixed in a posture extending in the front-rear direction, and as a result, the turning surface of the propeller 42 is maintained at right angles to the wind direction. The front end of the fish-shaped cross-section rotating member 6 is always located on the windward side due to the force received from the wind. The lowermost fish-shaped cross-section rotating member 6 is placed on a support cylinder (not shown), thereby preventing the fish-shaped cross-section rotating member 6 from dropping.

In the wind speed range exceeding the allowable maximum wind speed, the base 2 linked integrally with the horizontal turntable 31 is horizontally turned to the position shown in FIG. 4 by turning the horizontal turntable 31. FIG. 4 is a schematic explanatory view showing the wind power unit 4 and the vertical tail 5 in a strong wind state. The turning surface of the propeller 42 is parallel to the direction of the wind. The extending direction of the vertical tail 5 is also parallel to the direction in which the wind flows. As a result, the rotational moment (collapse moment) acting on the tower 1 due to the wind drag on the wind power generation unit 4 and the vertical tail 5 is greatly reduced.

When the wind direction changes frequently and the wind speed is very high, such as during the passage of a very large typhoon, the wind power generation unit 4 is crossed to near the ground. This method is described below. First, release the link connection that connects the base 2 and the horizontal rotating table 3 1. The wire hoisting devices 3 2 and 3 3 are driven to lower the base 2 and the wind power generation unit 4. By this descent, each fish-shaped cross-section rotating member 6 is also lowered. When the lowermost fish-shaped cross-section rotating member 6 is lowered to the upper surface of the pedestal described later provided on the ground, the joining of the two semi-fish-shaped cross-section rotating members 6a, 6b is released and the lowermost Remove the fish-shaped cross-section rotating member 6 from the tower 1. Next, the wire hoisting devices 3 2 and 3 3 are driven again, the base 2 and the wind power generation unit 4 are further lowered, and the next fish-shaped cross-section rotating member 6 is removed from the tower 1. Thereafter, this operation is sequentially repeated to lower the base 2 to the upper surface of the base. At this time, the two-blade propeller 42 is held horizontally. The increase may be performed in the reverse manner.

As shown in FIGS. 5 (a) and 5 (b), an auxiliary wing 7 is attached to the tip of the propeller 42. Fig. 5 (a) is a partial schematic front view showing the tip of the propeller 4'2 during turning, and Fig. 5 (b) is a schematic partial side view of the tip of the propeller 4 2 during turning in the circumferential direction. FIG.

As shown in FIG. 5 (a), the auxiliary wing 7 has a vertical cross-sectional shape of an airplane wing when viewed from the windward side. As a result, the auxiliary wing 7 that turns at high speed generates a large lift toward the center of the propeller 42. This lift reduces the centrifugal force acting on the propeller 42. The auxiliary wing 7 should be made as light as possible. As shown in Fig. 5- (b), the auxiliary wing 7 separates both sides of the propeller 42 and is known as a tip loss in the airplane wing. Suppresses the tip vortex. Next, a method for constructing the tower 1 in this embodiment will be described with reference to FIGS. Figures 6 and 8 to 11 are side views of the tower 1 under construction. Fig. 7 is a schematic partial plan view showing the main part of the tower-support device 8, Fig. 1 2 (a) is a front view of the pedestal 9 for supporting the tower during construction of the tower 1, and Fig. 1 2 (b) is FIG. 3 is a plan view of a pedestal 9 for supporting the tower during the construction of the tower 1.

The tower support device 8 has a hydraulic cylinder 10 for tower lift-up and a hydraulic clamp device 11 for the cylinder clamp. As shown in FIG. 12 (a), the reinforced concrete pedestal 9 has a square block shape, but is formed with a groove 91 that reaches one side from the center of the upper surface 90 of the pedestal 9. As shown in FIG. 6, a hydraulic cylinder 10 is accommodated in the groove portion 9 1 of the base 9. Ten a is a plate that pushes the tower partial cylinder 100 fixed to the upper end of the rod of the hydraulic cylinder 10 upward. As shown in FIGS. 6 and 7, a clamp device 11 is disposed above the pedestal 9. The clamping device 1 1 has a pair of left and right grip plates 1 1 a and 1 1 b. The grip plates 1 1 a and 1 1 b are attached to the tips of rods 1 2 a and 1 2 b of a hydraulic cylinder (not shown). It is fixed. The grip plates lla and lib move back and forth in the left-right direction to grip and release the tower partial cylinder 100. The gripping surfaces of the gripping plates 11a and lib have a substantially partial cylindrical shape for gripping the tower partial cylinder 100.

FIG. 6 shows a state where the upper tower partial cylinder 100 is gripped by the clamp device 11, and the lower tower partial cylinder 100 is mounted on the plate 10 a of the hydraulic cylinder 10. The lower end surface of the upper partial cylinder for tower 100 and the upper end surface of the lower partial cylinder for tower 100 are in close contact. In this state, the lower end face of the upper tower partial cylinder 100 and the upper end face of the lower tower partial cylinder 100 are integrated by welding or fastening. Next, the grip plates 1 1 a and 1 1 b are slightly retracted from the upper tower partial cylinder 1 0 0. Thereby, the upper tower partial cylinder 100 and the lower tower partial cylinder 100 are completely mounted on the plate 10 a. Next, the plate 1 0 a is raised. At this time, the grip plates 11 a and l i b serve as guide members when the upper partial cylinder for tower 100 and the lower partial cylinder for tower 10 1 rise.

FIG. 7 shows a state where the lower partial cylinder for tower 1 0 1 is raised to a position where it is gripped by the gripping plates 1 1 a and 1 1 b. Next, the gripping plate 1 1 a, lib is advanced toward the lower partial cylinder for tower 1 0 1. As a result, the lower tower partial cylinder 10 1 is gripped by the grip plates 1 1 a and 1 1 b. Next, as shown in Fig. 9, plate 1 0 a is lowered to its original position. Next, as shown in FIG. 10, the next tower partial cylinder 100 is slid on the upper surface 90 of the pedestal 9 and moved onto the plate 10 a. Next, the plate 10 a is slightly raised so that the upper end surface of the tower partial cylinder 10 0 2 is in close contact with the lower end surface of the tower partial cylinder 1 0 1, and then the tower partial cylinder 1 0 2 The upper end surface of the tower partial cylinder 1 0 1 is welded to the lower end surface of. After that, by carrying out the work process from Figure 7 onwards, Tower 1 Is completed.

After the tower 1 is completed, with the gripping plates 1 1 a and 1 1 b clamped the tower 1, remove the hydraulic cylinder 10 from the groove 9 1 of the base 9 and replace it with the basic partial cylinder. (Not shown) is moved laterally and placed coaxially with tower 1 in groove 9 1. Then loosen the gripping plates 1 1 a and l i b slightly. As a result, the lower end surface of the tower 1 is brought into close contact with the upper end surface of the foundation partial cylinder, and they are welded. Next, the partial cylinder for the foundation is pedestal made of ready-mixed concrete placed in the groove 9 1 of the pedestal 9.

As a result, tower 1 is fixed to pedestal 9.

In the above embodiment, the wind power unit 4, the base 2, the lifting device 3, and the fish-shaped cross-section rotating member 6 were attached later to the completed tower 1, but even if they were previously installed in the tower partial cylinder Good. In addition, it is possible to reinforce the rigidity of tower 1 by tightening the high-tensile wire that is placed before or after construction of tower 1 and penetrates the partial cylinder for each tower after tower 1 is completed.

In the above embodiment, the propeller 42 is directly connected to the rotating shaft of the generator 41. However, it is a matter of course that the propeller 42 may be connected through a speed increasing gear mechanism. In addition, the vertical tail 5 is omitted, and the wind direction is detected by a sensor.

1 may be rotated. Industrial applicability

By providing a wind power generator that is economically excellent in wind resistance, energy production with low carbon dioxide emissions can be achieved.

Claims

The scope of the claims

1. A wind turbine generator comprising: a wind power generator unit including a propeller, a generator driven by the propeller, and a cylindrical tower that supports the wind generator unit;

A wind turbine generator having a fish-shaped cross-section rotating member having a streamline shape substantially equal to a shape of a fish viewed from above and rotatably held by the tower.

2. A wind turbine generator comprising: a wind turbine unit comprising a propeller; a generator driven by the propeller; and a cylindrical tower that supports the wind turbine unit.

A base on which the wind power unit is mounted and fitted to the table so as to be movable up and down;

A wind power generator comprising a lifting device for lifting and lowering the base.

3. A wind turbine generator comprising a propeller, a wind power generator unit including a generator driven by the propeller, and a cylindrical tower that supports the wind generator unit,

A wind power detection device for detecting whether or not the wind force exceeds a predetermined threshold; and when the wind force exceeds the threshold, the wind power generation unit is configured such that a rotating surface of the propeller is substantially parallel to a wind direction. A wind power generator comprising a unit rotating device for rotating the unit.

4. A wind power generator comprising a propeller, a wind power generation unit including a generator driven by the propeller, and a cylindrical tower that supports the wind power unit.

A wind turbine generator having an auxiliary wing disposed at an outer peripheral end of the propeller and generating lift in a centripetal direction of the propeller.

5. Wind power unit comprising a propeller and a generator driven by the propeller And a wind turbine generator having a cylindrical tower that supports the wind power unit,

A lift-up process for vertically lifting a cylinder of a predetermined length forming a part of the tower;

A lateral shift step of shifting the next cylinder from the lateral direction directly below the cylinder;

A joining step of joining the upper end of the shifted cylinder to the lower end of the lifted cylinder;

The construction method of the wind power generator characterized by constructing the tower by repeating