JP7202551B1 - Floating offshore wind power generator - Google Patents

Abstract

[Problem] Floating offshore wind power generators, which are expected to increase in the future, are said to require construction and maintenance costs, so they can be installed in sea areas with a water depth of 50m to 150m without trouble and in a stable manner. Provided is a floating offshore wind power generator that can be moored and that can reduce costs by substituting the functions of devices required in conventional wind power generators with other devices. A rotating ring (17) is attached to a post (14) attached to a main float (13), mooring ropes (23) attached to an auxiliary float (20) are connected to the outer side of the rotating ring and arranged radially to moor a plurality of moorings when a wind power generator is set. By simultaneously pulling the cable bodies with the same degree of force and tying them to the rotating ring, the wind body 9 can be stably moored at a fixed position on the sea surface. At the same time, since the main float is rotatably held on the sea surface, the wind body can be turned by natural wind force. [Selection drawing] Fig. 10

Description

The present invention relates to a floating offshore wind power generator suitable for generating electric power by mooring and installing in the sea at a depth of about 50 m to 150 m at a relatively short distance from the coastline.

It is expected that the construction of offshore wind power generators will increase in Japan in the future as the use of renewable energy increases in recent years. On the ocean, there are few obstacles that block the wind compared to the ground, and the direction and speed of the wind are more constant than on the ground, so it is expected that stable power can be obtained. The offshore wind power generation facilities currently in practical use basically have the same structure as the wind power generators in practical use on land. It was relocated to the ocean where there are fewer restrictions on the sea.

In Japan, which is surrounded by the sea on all sides, it is thought that there are many coastal areas where offshore wind power generators can be installed. For this reason, the technology development of offshore wind power generators in the future will mainly focus on the ground-mounting type (a method in which the base of the tower is fixed to the seabed and the wind power generator is installed on the top of the tower that protrudes above the sea surface). ), the current situation is shifting to a floating type (a method in which the entire wind power generator including the tower floats on the sea and is moored and held by multiple ropes attached to anchors anchored on the seabed). be.

As described in Non-Patent Document 1, floating offshore wind power generation facilities currently in practical use include the spar type, TLP type, semi-sub type, and barge type, each of which has advantages and disadvantages. ing. With the exception of the barge type, the position of the mooring ropes attached to the floating body is in the water, so it takes a lot of time and effort to install them.
In addition, when constructing an offshore wind power generator, work to install the nacelle, which is equipped with a generator, gearbox, control device, etc. It needs to be carried out at a high place, and a dedicated work boat equipped with large heavy machinery is required. This point is also considered to lead to an increase in construction costs.

Furthermore, with regard to the main body of the wind power generator, in order to increase the ratio of the effect (=power generation output) to the construction cost, there is a desire to increase the output per unit of equipment, and accordingly the mass of the nacelle tends to increase. In such a high-output wind power generator, yaw control, which rotates a large-mass nacelle with long blades on the tower according to the wind direction, and pitch control, which changes the angle of attack of the blades with respect to the wind, are very effective. Since actuators and highly reliable gear devices are required, and such actuators generally have a high added value, this is also expected to lead to an increase in construction costs. (See Non-Patent Document 2, page 68)

In addition, in Patent Document 2, a compact semi-sub type floating body is used to reduce the vibration of the wind power generator caused by waves. Proposals to reduce costs have been presented. With this configuration, the effect of the wind receiving surface of the wind turbine body trying to face the wind (wind direction followability) can be obtained, enabling efficient operation of the offshore wind power generator and at the same time reducing operating costs. .
On the other hand, since the mooring point with a rotating mechanism described in Patent Document 2 is underwater, it is necessary to periodically inspect and maintain the mooring point underwater. is presumed to be required.

Furthermore, Patent Document 3 proposes the position of an anchor installed on the seabed for mooring a barge-type floating wind power generator and the length of a mooring rope. The barge type can be mass-produced at factories in coastal areas, etc., and is expected to spread in the future. Patent Literature 3 introduces a high-level description of mooring line setting for mooring a large barge-type floating body, which is also considered to require special technology.

Japanese Patent Application No. 2010-248511 "Rotating and swinging control device for wind power generation facility and floating offshore wind power generation facility" Japanese Unexamined Patent Publication No. 2019-67041 "Floating Foundation and Floating Power Generator" JP 2019-128995 "Installation method of mooring system and installation method of mooring floating body"

“Current status and prospects for wind power generation” November 2020 Agency for Natural Resources and Energy "Tokoton Gentle Wind Power Generation Book" B&T Books Nikkan Kogyo Shimbun

One of the problems to be solved by the present invention is, when installing a floating offshore wind power generator in a sea area with a water depth of 50 m to 150 m, the work of attaching the mooring rope to the floating body and the work of adjusting the tension of the mooring rope during installation. and to reduce labor and construction costs by performing anchor setting work on the sea floor as much as possible on the sea surface.

Another problem to be solved by the present invention is to provide a mooring device for a floating wind power generator that is less affected by changes in tide level and waves offshore.

The third problem to be solved by the present invention is that the nacelle is expected to increase in size and mass as the output of each floating offshore wind power generator increases in the future. Turning control (or yaw control) toward the wind is considered to be technically difficult. In order to solve this problem, we propose a configuration that rotates the entire wind turbine body, including the wind power generator and the tower, horizontally on the sea surface to facilitate turning control.

The fourth problem to be solved by the present invention is to omit the yaw actuator, pitch actuator, speed-up gear, brake at the time of load shedding, etc., which are required in conventional general wind power generators, and replace them with other devices. By doing so, it is possible to reduce the construction cost and maintenance cost of the floating offshore wind power generator.

A floating offshore wind power generator according to Example 1 of the present invention is configured as follows.
The wind power generator to which the present invention is directed is generally a horizontal shaft multi-rotor type with a vertical wind receiving surface, in which the wind turbine body is constructed by installing a plurality of blades in a direction perpendicular to the horizontal rotation axis. It is called a wind turbine. In this type of wind power generator, the wind-receiving surface faces the wind, and the rotational force of the wind body generated when the wind hits the blades is transmitted to the drive shaft of the generator to generate electricity.
The rotation shaft of the wind turbine body according to the first embodiment of the present invention is horizontally held by a plurality of supports installed on a pedestal on the sea surface. This rotary shaft has a structure in which bearings are attached to both ends, or a structure in which a double-end fixed shaft that plays the role of a bearing is passed through a hollow structure rotary shaft, and the hollow structure rotary shaft rotates while being held by the fixed shaft. Either
In order to hold the above-described wind turbine body on the sea surface, a support is attached vertically upward to the central portion of the main float that is floating on the sea surface, and the lower surface of the pedestal is fixed at the upper end of the support. In addition, a weight is attached in the water below the main float to restore the oscillation of the main float caused by waves on the sea surface. With the above configuration, the wind turbine body is held floating on the sea surface by the main float.

Furthermore, the column installed on the main float has a cylindrical shape, and a rotating ring having a sliding surface matching the cross-sectional shape of the column is attached to the column so as to be horizontally rotatable. A plurality of hooks are attached to the outer surface of this rotating ring, and an auxiliary rope is attached to each hook. The other end of the auxiliary rope is connected to an auxiliary float floating on the sea surface, and a mooring rope is connected to each auxiliary float. The configuration is connected with
A combination of a pair of hooks, auxiliary ropes, auxiliary floats, mooring ropes, and anchors described above is hereinafter referred to as a mooring rope. Therefore, the auxiliary float of the mooring cable floats above the sea surface, the auxiliary rope is above the sea surface, and the mooring rope and the anchor are installed at a position submerged in the sea.

Next, a plurality of anchors for mooring ropes are installed on the sea floor at positions away from the main float radially around the main float when viewed from above, and then the auxiliary ropes for the mooring ropes are simultaneously tensioned to the same level. and fastened to the hook of the mooring ring. With this setting work, the main float is pulled horizontally outward with equal force by multiple auxiliary ropes near the center of the mooring cable installed radially, and as a result, the main float is above the sea surface. is expected to stay in a fixed position.
Furthermore, since the rotating ring is rotatably attached to the strut, the wind receiving surface of the wind turbine body is held at a fixed position while being able to rotate 360 degrees horizontally on the sea surface. Therefore, if the main float has a cylindrical shape or the like, it is considered that the resistance when the main float floating on the sea surface rotates will be reduced.

In addition, when the wind blowing on the wind receiving surface is above a certain wind speed, the wind body with the vertical wind receiving surface configured as described above receives the wind on the right side of the central axis perpendicular to the wind receiving surface. and the resistance of the wind on the left side try to balance.
On the other hand, by forming the main float in a cylindrical shape, as described in (0016), it is possible to reduce the resistance force when the main float floats on the sea surface and rotates. At the same time, if the shape is cylindrical, it is thought that there will be little effect from tidal currents near the sea surface. ) is considered feasible.

A floating offshore wind power generator according to Embodiment 2 of the present invention has a configuration in which a plurality of auxiliary floats in the mooring cable described in Embodiment 1 are attached in the pulling direction of the mooring cable. With this configuration, it is possible to stably hold the main float at a fixed position even in a sea area with a large difference between the minimum tide level and the maximum tide level or a sea area with high waves.

In the floating offshore wind power generator according to the third embodiment of the present invention, a propulsion device having a screw or the like having forward and backward propulsion is attached to the main float according to the first or second embodiment. The angle is fixed and multiple are attached. With this propulsion device, it is possible to rotate the main float horizontally on the sea surface clockwise or counterclockwise 360 degrees at any angle. It is possible to turn the head in an optimum direction, such as a direction to face or a direction along the wind.

In the floating offshore wind power generator according to the fourth embodiment of the present invention, the brake disc is attached to the strut described in the first to third embodiments, and the braking device attached to the rotating ring applies braking to the brake disc, Fig. 4 shows a configuration for temporarily stopping the rotational movement of the strut; With this configuration, it is considered possible to stably maintain the wind receiving surface of the wind body at a constant angle even under conditions where wind speed and wind speed change unstably on the sea.

A floating offshore wind power generator according to Example 5 of the present invention represents a configuration in which a universal joint mechanism that allows tilting in the front-rear direction and the left-right direction is added to the rotating ring described in Examples 1 to 4. there is With this configuration, it is possible to reduce frictional resistance generated between the support and the rotating ring during rotation even when the support is greatly tilted by waves or the like.

In the floating offshore wind power generator according to Embodiment 6 of the present invention, the wind turbine body described in any one of Embodiments 1 to 5 has blade beams in the middle of the blades or between the tips for the purpose of increasing the strength. The structure is connected by In addition, by using the blade beam attached to the tip of the blade and attaching a flat plate between the blade beams, the strength is further increased, and at the same time when the wind is strong like a typhoon, the wind body can be turned in the direction of the wind. , it is possible to block the direct hit of the strong wind to the blade. (See Example 10)

In a floating offshore wind power generator according to Embodiment 7 of the present invention, a plurality of spokes are installed in the direction perpendicular to the outer surface of the rotation shaft of the wind turbine body, which is the wind turbine body described in any one of Embodiments 1 to 5. 3 shows a configuration in which the tips of the spokes are connected by spoke beams at positions of the same radius from the center of the rotating shaft, blades are attached from the tips of the spokes in the outer peripheral direction, and the tips of the blades are connected by blade beams. With this configuration, part of the wind that hits the wind receiving surface of the wind body passes through the blade-less portion in the center of the wind body, so it is considered that the wind flow through the wind body as a whole is improved.

In a floating offshore wind power generator according to Embodiment 8 of the present invention, the tips of the blades of the wind turbine body described in any one of Embodiments 1 to 5 are connected with a cylindrical frame, and the outer surface of the cylindrical frame is A wheel attached to the tip of the drive shaft of the generator comes into contact with the wheel and rotates to generate power. With this configuration, the generator drive shaft can rotate at high speed, so that the generator can be downsized.

A floating offshore wind power generator according to Example 9 of the present invention has a horizontal arm installed at the tip of the support column described in any one of Examples 1 to 8, and on the windward side of Examples 1 to 8 on the arm. A configuration is shown in which the wind-powered body including the pedestal described in any one of the eighth embodiments is attached, and a vertical wing for receiving the wind and a horizontal wing are further installed on the leeward side of the arm. With this configuration, even when the wind speed is low, the vertical blades flutter in the wind, making it easier to turn the wind receiving surface of the wind body toward the wind. In addition, by setting the angle of attack of the horizontal blades in a direction that offsets the tilting force of the wind turbine due to the wind force during strong winds, an effect of suppressing the tilt of the wind turbine can be expected.

The floating offshore wind power generator according to the tenth embodiment of the present invention includes an anemoscope for measuring the wind direction and an anemometer for measuring the strength of the wind near the wind turbine body described in any one of the third to ninth embodiments. is installed, and the information about the wind direction and wind speed obtained by those measuring instruments is sequentially transmitted to the control panel as a signal. Information is transmitted to the control panel, the information is processed in the control panel, and the screw is operated and stopped as described in any of Examples 3 to 9 using the results. This makes it possible to automatically and appropriately operate the wind power generator based on wind direction, wind speed, and other necessary operating information.

The floating offshore wind power generators according to Embodiments 1 and 2 of the present invention have a wind turbine, a generator necessary for power generation, auxiliary devices such as bearings, supports, struts, and all other components on the main float. While floating on the surface of the water, it is held in a fixed position on the surface of the sea by the pulling force exerted simultaneously by multiple mooring ropes, and at the same time it can be rotated 360 degrees horizontally on the surface of the sea by a rotating ring attached to the strut. is.
From this, the floating offshore wind power generators according to Examples 1 and 2 are moored at a fixed position on the sea surface, and the wind receiving surface of the wind turbine has the property of facing the wind (wind direction followability). It can be expected that the power generation efficiency will improve due to the natural wind force.

Furthermore, in the floating offshore wind power generators according to Embodiments 1 and 2 of the present invention, the attachment position of the auxiliary rope attached to the rotating ring for mooring the wind turbine and the attachment position of the mooring rope to the auxiliary float are Since it is on or near the sea surface, it is easy to set up the mooring cable during construction, and it is easy to do, and maintenance work during operation of the wind power generator does not take much work, so construction costs , the effect of reducing maintenance costs can be expected.

In the floating offshore wind power generators according to Embodiments 1 and 2 of the present invention, the main float is restored by attaching a fishing rod in the seawater below the main float and attaching a weight to the lower end of the fishing rod. Even when the force is increased and the waves are high, the main float is restrained from rocking and its posture is stabilized.

Moreover, the floating offshore wind power generator according to the second embodiment of the present invention shows a configuration in which a plurality of auxiliary floats in the mooring rope are attached in the direction in which the auxiliary rope and the mooring rope are pulled. With this configuration, even if there is a large difference between the tide level when the mooring cable is installed and the tide level when the wind power generator is in operation, or when the wave height on the sea surface increases during stormy weather, the auxiliary float on the side closer to the anchor will be submerged in the sea. However, it is considered that the auxiliary float near the main float is maintained floating on the sea surface. Therefore, the rotating ring to which the auxiliary rope is attached is pulled substantially horizontally by the auxiliary rope even when the tide level or waves are high. Due to this effect, a stable mooring state is maintained even when the conditions of the sea surface of the main float are severe, so stable operation of the wind power generator can be expected even in stormy weather.

In the floating offshore wind power generator according to the third embodiment of the present invention, the nacelle, which is heavy as a result of housing the components in the conventional wind power generator, rotates horizontally on the tower, so that it is powerful for turning control. Although an actuator was required, in Example 3, by replacing this with a screw attached to the float, the effect of facilitating the turning control of the floating offshore wind power generator, which is expected to increase in size and mass in the future. I can expect it. At the same time, cost reductions during construction and generator operation can also be expected.
At the same time, as in Example 3, by attaching a plurality of screws having propulsive forces in opposite directions to the float, when a power failure occurs in the power supply system and it becomes necessary to cut off the load on the system, multiple By simultaneously moving screws in opposite directions, it is possible to release surplus energy generated in the wind power generator, and the effect of preventing excessive rotation speed (idling) of the power generator due to no load can be expected. As a result, it is possible to eliminate the braking device for the drive shaft that is required in conventional wind power generators.

A floating offshore wind power generator according to a fourth embodiment of the present invention has a configuration in which a rotational braking device is attached to a strut of a wind turbine to temporarily stop the rotational movement of the strut as necessary. With this braking device, the angle of the wind-receiving surface of the wind-body can be maintained constant even under conditions where the wind speed and wind speed change unstably on the sea, so the effect of obtaining a more stable power generation output can be expected.

A floating offshore wind power generator according to a fifth embodiment of the present invention has a configuration in which a universal joint mechanism that allows tilting in the front-rear direction and the left-right direction is attached to a rotating ring attached to a support. As a result, even if the strut is greatly tilted by waves or the like, the frictional resistance generated between the strut and the rotating ring during rotation is reduced, so the effect of facilitating the turning control of the wind turbine can be expected.

A floating offshore wind power generator according to a sixth embodiment of the present invention has a structure in which blade beams are connected at the midpoints of the blades or at the tips thereof for the purpose of increasing the strength of the wind turbine. In addition, by using the blade beam attached to the tip of the blade and attaching a flat plate between the blade beams, the strength is further increased, and at the same time, if the wind body is turned in the direction along the wind during strong winds, etc., It is possible to block direct hits of strong winds to the blades, and the effect of preventing damage to the blades can also be expected. (Refer to Example 10 and the accompanying drawing at the bottom right of FIG. 26 )

In contrast to the blades attached to the wind turbine of Example 6, the floating offshore wind power generator according to Example 7 of the present invention uses a part of the blade on the rotating shaft side as a spoke, so that the central part of the wind receiving surface has A structure is shown in which a region through which the wind passes is formed. With this configuration, part of the wind that hits the wind receiving surface passes through the bladeless portion in the center of the wind body, so that the wind passes through the wind body as a whole, and as a result, the effect of improving the power generation efficiency can be expected.

In the floating offshore wind power generator according to Example 8 of the present invention, the tips of the blades of the wind turbine bodies of Examples 6 and 7 are connected with a cylindrical frame, and the drive shaft of the generator is attached to the outer surface of the cylindrical frame. It shows a configuration that rotates the drive shaft and generates power by contacting the wheels attached to the. With this configuration, the generator drive shaft can rotate at high speed, so it is possible to omit the gearbox that is required in conventional wind power generators. Alternatively, some wind power generators in recent years have been put into practical use that do not require a gearbox even if the rotational speed of the drive shaft is low. It is considered to be large. Therefore, it is expected that the configuration of the eighth embodiment can reduce the construction cost and maintenance cost of the wind power generator by reducing the size of the power generator.
Furthermore, when a power failure or the like occurs in the power supply system and it becomes necessary to cut off the load of the generator to the power system, the wheels are moved away from the cylindrical frame, and the wheels and the outer surface of the cylindrical frame are removed. By eliminating contact with the generator, it is possible to prevent excessive rotation of the generator (idling), so that it is possible to prevent damage to the generator.

In the floating offshore wind power generator according to the ninth embodiment of the present invention, a horizontal arm is installed at the tip of a support column, a wind turbine body including a pedestal is attached on the windward side of the arm, and the wind is received on the leeward side of the arm. It is a configuration with vertical wings and horizontal wings installed. With this configuration, even when the wind speed is low, the vertical blades on the lee side flutter in the wind and face the wind-receiving surface of the wind body toward the wind, so it is considered possible to realize turning by natural wind power. At the same time, if the angle of attack is set so that the wind force acts upward on the horizontal blades, the inclination of the wind body can be offset by canceling the force acting on the wind receiving surface, which tilts the wind body toward the leeward side. A suppressive effect can also be expected.

The floating offshore wind power generator according to the tenth embodiment of the present invention has weather conditions such as the wind direction necessary for the operation of the wind turbine as described in any of the first to the ninth embodiments, the rotation speed of the wind turbine, and the ground speed. Necessary information such as a power outage in the electric power system is transmitted as a signal to the control panel, the information is processed in the control panel, and the result is used to operate and stop the screw. Based on the wind direction, wind speed, and other necessary operational information, this enables automatic control of the direction of the wind turbine body relative to the wind direction, enabling the wind power generator to always operate under optimal conditions. becomes.

FIG. 1 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a rotating shaft portion to which a solid rod is applied to the rotating shaft of Example 1 of the present invention. FIG. 3 is a cross-sectional view of a rotating shaft portion in which a hollow rod is applied to the rotating shaft of Example 1 of the present invention. FIG. 4 is a cross-sectional view of the strut and rotating ring of Example 1 of the present invention. FIG. 5 is an explanatory diagram of the principle of mooring the floating offshore wind power generator according to the first embodiment of the present invention using mooring ropes. FIG. 6 is an explanatory diagram showing the movement of the floating offshore wind power generator according to the first embodiment of the present invention on the sea surface. FIG. 7 is an explanatory diagram showing the installation procedure of the floating offshore wind power generator according to the first embodiment of the present invention. FIG. 8 is a bird's-eye view of the floating offshore wind power generator of Embodiment 2 of the present invention. FIG. 9 is an explanatory diagram of the mooring principle of the floating offshore wind power generator according to the second embodiment of the present invention using mooring ropes. FIG. 10 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 3 of the present invention. FIG. 11 is an explanatory diagram showing the turning situation of the third embodiment of the present invention. FIG. 12 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 4 of the present invention. FIG. 13 is a bird's-eye view showing a brake device attached to a column according to Embodiment 4 of the present invention. FIG. 14 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 5 of the present invention. FIG. 15 is a cross-sectional view of a universal joint attached to a post according to Example 5 of the present invention. 16A and 16B are explanatory diagrams showing the movement of the universal joint attached to the strut in Example 5 of the present invention. FIG. 17 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 6 of the present invention. FIG. 18 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 7 of the present invention. FIG. 19 is an explanatory diagram showing the flow of wind to the wind turbine in Example 7 of the present invention in comparison with a conventional wind power generator. FIG. 20 is a bird's-eye view of the floating offshore wind power generator of Example 8 of the present invention. FIG. 21 is an explanatory diagram of the periphery of the generator of Embodiment 8 of the present invention. FIG. 22 is a bird's-eye view of a floating offshore wind power generator according to Embodiment 9 of the present invention. FIG. 23 is a lateral view of the ninth embodiment of the present invention receiving wind. FIG. 24 is a configuration diagram showing a measurement device, a controlled object, and a signal flow for operating and controlling a screw according to the tenth embodiment of the present invention. FIG. 25 is a block diagram of operation control within the control panel according to the tenth embodiment of the present invention. FIG. 26 is a flow chart of operation control logic according to the tenth embodiment of the present invention.

The floating offshore wind power generator according to the present invention reduces the work of setting mooring ropes when constructing a wind power generator in a sea area with a water depth of 50 m to 150 m, and stabilizes the wind power generator at a fixed position in the same sea area. mooring. In addition, cost reduction can be achieved by replacing the yaw control actuator or the like for performing turning control (or yaw control) required in conventional wind power generators with other devices.
The contents are explained below.

FIG. 1 shows a bird's-eye view of the entire floating offshore wind power generator of the first embodiment.
In the wind turbine body according to the first embodiment of the present invention, a rotating shaft 3 is horizontally held by bearings 4 attached to the tips of a plurality of supports 2 installed on a pedestal 1 on the sea surface. A plurality of blades 6 for receiving the wind are radially fixed in a direction perpendicular to the rotating shaft 3 via a hub 5, and the rotational force generated by the wind hitting the blades 6 is mounted in the nacelle 7. The power is transmitted to the drive shaft of the generator 8 to generate electricity. The wind turbine body 9 is formed by the above combination.
Next, the structure around the rotary shaft 3 and the bearing portion will be described with reference to FIGS. 2 and 3. FIG. 2 and 3 show the AA cross section of FIG. 1. FIG. 2 shows a structure in which a solid round bar is used as the rotary shaft 3 and bearings 4 are attached to both ends of the solid round bar. Alternatively, as shown in FIG. 3, a structure in which the fixed shaft 10 is passed through a rotating shaft 11 having a hollow structure and the hollow rotating shaft 11 rotates around the fixed shaft 10 while being held by the fixed shaft 10 is also implemented. It is possible.
2, the output of the rotating shaft is transmitted directly to the generator or the gearbox, and in FIG. 3, the output of the rotating shaft is transmitted to the generator via the gear 12.
Furthermore, a strut 14 is attached upward to the central portion of the main float 13 floating on the sea surface, and the lower surface of the pedestal 1 is fixed and held by the upper end of the strut 14 . A weight 16 is attached in the water below the main float 13 via a fishing rod 15 for the purpose of restoring the inclination of the main float 13 above the sea surface. With the above configuration, the wind turbine body 9 is held floating on the sea surface by the main float 13 .

FIG. 4 is a cross-sectional view taken along line BB of FIG. 1, showing a cross-sectional view around the rotating ring 17 attached to the strut 14 in the first embodiment. The strut 14 has a cylindrical shape, and a rotating ring 17 having a sliding surface matching the cross-sectional shape is attached to the strut 14 so as to be horizontally rotatable. A plurality of hooks 18 are attached to the outer surface of this rotating ring, and an auxiliary rope 19 is fastened to each hook 18 . In FIG. 1, an auxiliary float 20 is connected to the other end of the auxiliary rope 19, a mooring rope 21 is connected to the auxiliary float 20, and the mooring rope 21 is connected to an anchor 22 installed on the seabed. do. The auxiliary float 20 is assumed to have sufficient buoyancy to float on the sea surface even when the mooring rope 21 is connected.
A combination of the auxiliary ropes 19, the auxiliary floats 20, the mooring ropes 21, and the anchors 22 described above is hereinafter referred to as a mooring rope body 23.

Next, in FIG. 1, the mooring ropes 23 are installed on the sea floor at a position away from the main float radially from above with the main float 13 as the center, and then the auxiliary ropes 19 of the mooring ropes 23 are installed. At the same time, it is pulled with the same tension and fastened to the hook 18 of the rotating ring 17 . This setting operation balances the pulling forces of the plurality of auxiliary ropes connected to the rotating ring 17, so that the main float 13 stays at a fixed position near the center of the mooring cable 23 radially installed.
Furthermore, since the rotating ring 17 is rotatable with respect to the column 14, the wind turbine body 9 attached to the column 14 via the pedestal 1 can be horizontally rotated 360 degrees on the sea surface and held at a fixed position. is held to

Next, the principle of mooring by the mooring cable body 23 of Embodiment 1 will be described with reference to FIG.
5(1), (2), and (3) are views of the floating offshore wind power generator of Example 1 shown in FIG. 1 as seen from the lateral direction. The operation of fastening the plurality of auxiliary ropes 19 to the rotating ring 17 shall be performed when the tide level is low as shown in FIG. 5(1). By this setting work, the wind body is held near the center of the mooring ropes 23 radially set around the main float 13 . (see paragraph 0043)
(2) in FIG. 5 shows a state in which the tide level is higher than in (1). As the tide level rises, the main float moves upward and the auxiliary float accordingly moves upward. However, since the length of the mooring rope 21 attached to the anchor 22 is constant, part of the auxiliary float 20 is submerged, As a result, the 19 horizontal pulling force of the auxiliary rope is increased. Since a plurality of auxiliary ropes 19 are fastened to the rotating ring 17, the tensile forces of the auxiliary ropes are balanced even when the tide level rises, and the wind body 9 stays at the position near the center of the mooring cable body 23.例文帳に追加FIG. 5(3) shows a state in which the tide level has risen further. is held at a sea surface position near the center of the mooring line 23 .

In bad weather, it is expected that some of the plurality of auxiliary floats 20 will be submerged due to waves, etc., and an imbalance will occur in the pulling force of the auxiliary ropes. The main float would then move horizontally over the surface of the sea due to the force of the auxiliary ropes, which had an increased tensile force than the others.
However, since the main float 13 has buoyancy to float the structure including the wind turbine body 9 and the weight 16, the volume and mass are large, so the main float is moved by the pulling force of the auxiliary float, which has a smaller volume than the main float. For this reason, it is thought that a certain amount of time is required. Therefore, even if the floating offshore wind power generator is enlarged and the mass is increased, the movement becomes sluggish, so that the main float moored in the configuration of the first embodiment tends to stay stably at a fixed position even in bad weather. can be expected.

Next, the behavior of the floating offshore wind power generator according to Example 1 on the sea surface will be described with reference to FIG. As described in section (0043), in the configuration of the first embodiment, the main float 13 is rotatably held on the sea surface, so the resistance when the main float 13 rotates is small, and the main float 13 If it is a concentric shape with point symmetry, it is considered that the influence of the tidal current on the rotation operation is small. Therefore, as shown in FIGS. 6(1) and 6(2), it is possible to realize the turning of the wind receiving surface by the natural wind force. This is an effect that could not be achieved with yaw control that rotates the nacelle installed at the top of the tower, as in conventional wind power generators. (See paragraphs 0017 and 0027.)
Further, as shown in FIG. 6(3), the force applied to the outer surface of the rotating ring 18 by the plurality of auxiliary ropes 19 is mainly a horizontal tensile force, and the force acting in the vertical direction is small, so the rotating ring was attached. The force that suppresses the tilting of the strut 14 in the front-rear and left-right directions is small. Therefore, when the column 14 rotates, the frictional resistance of the sliding surface of the rotating ring is small, and even when the column 14 rotates in a tilted state in the horizontal direction, the rotation is smooth.
At the same time, the effect of restoring the posture of the main float 13 on the sea surface by the weight 16 is expected to maintain a stable mooring condition even in bad weather.

Next, a procedure for installing the first embodiment of the present invention when constructing a wind power generator will be described with reference to FIG. In FIG. 7(1), the main float 13, struts 14, rotating ring 17, etc. are assembled at the wind power generation facility production base adjacent to the port, and then the hub 5, nacelle 7, etc. are assembled using temporary supports 24 and stoppers 25. are temporarily assembled, and further the auxiliary float 20, the mooring rope 21 and the anchor 22 are partially connected to combine the mooring rope 23. It floats on the sea in that state and shows how it moves to the installation sea area by a tugboat .
In FIG. 7(1), it is assumed that the strut 14 penetrates through the central portion of the float 13 and is movable in the vertical direction, and is fixed upwardly by a stopper 25 . Also, the anchor 22 is in the form of a caisson-type concrete block, and is assumed to move while floating on the surface of the sea.

Fig. 7 (2) onwards show the setting procedure of the mooring cable body and the main body of the floating wind power generator after arriving at the installation sea area.
In FIG. 7(2), the mooring rope 21 is first thrown into the sea, and at the same time the auxiliary rope 19 is connected to the auxiliary float 20. In FIG. Next, the stopper 25 attached to the strut 14 is removed, the weight is submerged in the sea, and the strut 14 is fixed to the main float 13 at a predetermined position.
Next, as shown in FIG. 7(3), the caisson anchor is sunk at the target position on the seabed by a crane ship, and the opposite end of the auxiliary rope 19 connected to the auxiliary float 20 is temporarily fastened to the rotating ring 17. . At the same time, the blade 6 is attached to the hub 5 using the temporary support, and the pedestal 1 and the support 2 are attached while the temporary support 24 is removed to fix the bearing and the nacelle 7. - 特許庁

Furthermore, as shown in FIG. 7(4), when the anchor has been installed at the target point, the auxiliary ropes temporarily fastened to the rotating ring 17 are pulled at the same time with the same force to move the main float 13 to the mooring ropes 23. set in the center of the
It should be noted that this work must be done when the tide level in the installation sea area is at its lowest. It is necessary to make adjustments so that there is enough power to hold the wind force received by the wind surface.
FIG. 7(5) shows a state in which the installation of the wind power generator shown in Example 1 is completed and the pulling forces of the plurality of auxiliary ropes 19 are balanced.
By following the installation procedure shown in Fig. 7, it is possible to perform operations such as anchor installation, auxiliary rope attachment to the rotating ring, and tension adjustment on the surface of the sea. It is thought that it will be possible to plan

Next, FIG. 8 shows the configuration of a floating offshore wind power generator according to a second embodiment of the present invention.
FIG. 8 shows a configuration in which a plurality of auxiliary floats in the mooring rope body 23 explained in the first embodiment are attached in the pulling direction of the mooring rope body 23 . The one connected to the auxiliary rope 19 is called an auxiliary float A (reference numeral 26), and the one connected to the mooring rope is called an auxiliary float B (reference numeral 27). Auxiliary floats are connected to each other by connecting ropes 28 .
The mooring principle in the second embodiment will be explained with reference to FIGS. 9(1), (2), and (3). FIG. 9(1) is a lateral view of a situation in which the offshore wind power generator of the second embodiment is set when the tide level is low. As explained in (0043), the operation of pulling the plurality of auxiliary ropes 19 toward the rotating ring causes the auxiliary float B (reference numeral 27) to be pulled downward by the mooring ropes 21 and sink into the sea. On the other hand, the auxiliary float A (reference numeral 26) connected to the auxiliary rope 19 is pulled substantially horizontally outward by the connecting rope 28, so that it does not sink in the water and maintains a state of floating on the sea surface. The positional relationship between the auxiliary float A and the auxiliary float B is maintained in FIG. 9(2) where the tide level rises and also in FIG. 9(3) where the tide level further rises to the highest tide level. Due to this action, the pulling force of the auxiliary ropes 19 is balanced even in a sea area with a large tidal level difference, so that the wind body 9 remains in a fixed position and can maintain a stable mooring state.

Next, FIG. 10 shows the configuration of Example 3 of the present invention.
FIG. 10 shows a bird's-eye view of a state in which a plurality of propulsion devices 30 having screws 29 attached in the longitudinal direction of the propulsion devices 30 are attached to the side surface of the float 13 in the sea. It is assumed that the mounting angle of the propulsion device 30 with respect to the float 13 is fixed.
11(1) and (2) show top views of the third embodiment. FIG. 11(1) shows a state in which the float 13 is horizontally rotatably held at the central portion of a plurality of mooring ropes 23, and one side of the propulsion device 30 fixed to the side surface of the auxiliary float 13 is shown. The driving force of the screw 29 is shown to rotate clockwise.
FIG. 11(2) shows a situation in which the propulsive force of the other screw 29 of the propulsion device 30 rotates counterclockwise.
With the above configuration, in the third embodiment, the direction of the wind turbine 9 can be arbitrarily controlled, and the wind turbine 9 can be rotated in an appropriate direction according to the direction of the wind, enabling efficient and stable power generation. becomes.

At the same time, as shown in Example 3, by attaching a plurality of screws having propulsive forces in opposite directions to the main float 13, when a power failure or the like occurs in the power supply system and it becomes necessary to cut off the load on the system, By moving several oppositely directed screws simultaneously, it is possible to release the surplus energy generated by the wind turbine. As a result, an effect of preventing excessive rotation speed (idling) of the generator in a no-load state and preventing damage can be expected. (see 0031)

12 and 13 show the configuration of a floating offshore wind power generator according to a fourth embodiment of the present invention.
FIG. 12 is a bird's-eye view of Example 4, and FIG. 13 shows an enlarged view of part (E) around the rotating ring 17. As shown in FIG. FIG. 13 shows a configuration in which a brake disk 31 is attached to the strut 14 and the brake disk is braked by a brake device 32 attached to the rotating ring 17 to temporarily stop the rotational movement of the strut. .
With this configuration, it is possible to keep the angle of the wind receiving surface of the wind body constant even under conditions where the wind speed and the wind speed change unstably on the sea, and stable power generation is possible.

14 to 16 show the configuration of a floating offshore wind power generator according to a fifth embodiment of the present invention.
FIG. 14 is a bird's-eye view of Example 5, showing a configuration in which a universal joint is added to the rotating ring portion described in Examples 1 to 4. FIG. 15 shows a DD sectional view and an EE sectional view around the universal joint shown in FIG.
The specific structure of the universal joint according to the fifth embodiment is shown in FIG. 15. As shown in FIG. An outer ring A (reference numeral 35) and an outer ring B (reference numeral 36) attached to the outer side of the outer ring A via a pin 34 are employed. Furthermore, hooks 18 are attached to the outer surface of the outer ring B, and auxiliary ropes 19 are fastened to the hooks 18 .
With this configuration, as shown in FIG. 16, the center ring 33 prevents the horizontal rotation of the support column 14 even when the support column 14 is greatly tilted back and forth and left and right due to wind pressure on the wind receiving surface due to waves and strong winds during stormy weather. Since there is no restraint, stable turning control of the wind turbine body 9 is possible.

Next, FIG. 17 shows the configuration of a floating offshore wind power generator according to a sixth embodiment of the present invention.
The floating offshore wind power generator of the sixth embodiment has a structure in which blade beams 37 are used to connect the ends of the blades 6 in the middle or to each other for the purpose of increasing the strength of the wind turbine body 9 . Furthermore, by using the blade beams 37 attached to the tip of the blade and attaching a flat plate 38 between the blade beams 37, a further increase in strength can be expected. In addition, during strong winds such as typhoons, the propulsion device 30 is used to turn the wind receiving surface in the direction along the wind, so that the flat plate 38 blocks the wind and avoids direct hits of the strong winds to the blades 6. It can be expected to prevent damage to the blade at times. (Refer to item 0034 and figure attached to the lower right in FIG. 26)

18 and 19 show the configuration of a floating offshore wind power generator according to Embodiment 7 of the present invention.
FIG. 18 is a bird's-eye view of the floating offshore wind power generator of Example 7. Spokes 39 having the same radius radially outward from the center of rotation shaft 3 are attached to Example 6, and the spokes 39 are connected to each other by spoke beams. 40, the blades 6 are attached to the outer sides of the spokes 39, and the tips of the blades 6 are connected with the blade beams 37. FIG. Further, as in the sixth embodiment, by attaching the flat plate 38 between the blade beams 37, the strength can be further increased.
As shown in FIGS. 19(1) and 19(2), the effect of the seventh embodiment is that when the blades 6 shown in FIG. Part of the wind blows outward due to the aerodynamic resistance of the wind receiving surface. Since the blades pass through the part without blades, the aerodynamic resistance of the wind receiving surface is reduced, and as a result, the wind speed received by the wind receiving surface increases, so the effect of improving the power generation efficiency can be expected.

Next, FIGS. 20 and 21 show the configuration of a floating offshore wind power generator according to an eighth embodiment of the present invention.
FIG. 20 is a bird's-eye view of the floating offshore wind power generator of Embodiment 8. The tips of the blades 6 are connected to each other by a cylindrical frame 41, and the generator drive shaft of the generator unit 42 is attached to the outer surface of the cylindrical frame 41. It shows a configuration that rotates the drive shaft and generates power by contacting the wheels attached to the.
FIG. 21(1) shows the configuration around the generator unit 42. A generator base 43 movable in the direction toward the cylindrical frame 41 is attached on the pedestal 1, and the generator drive shaft is mounted on the generator base 43. A generator 44 with wheels 46 is fixed to the tip of 45 . As shown in FIG. 21(2), power is generated by bringing the wheels 46 of the generator unit into contact with the rotating cylindrical frame 41 . Since the outer diameter of the cylindrical frame 41 is larger than the outer diameter of the wheels 46, the number of rotations of the wheels 46 increases, and the generator drive shaft rotates at high speed. It is conceivable that the gearbox will not be required. In recent years, wind power generators have been put into practical use that do not require gearboxes even if the rotation speed of the drive shaft is low. Therefore, the construction of the eighth embodiment can be expected to reduce the construction cost and maintenance cost of the wind power generator by miniaturizing the power generator.

Next, FIGS. 22 and 23 show the configuration of a floating offshore wind power generator according to a ninth embodiment of the present invention.
FIG. 22 is a bird's-eye view of the floating offshore wind power generator of Embodiment 9. A horizontal arm 47 is installed at the tip of the strut 14, and the wind turbine body 9 including the pedestal 1 is attached to the windward side of the arm 47. Furthermore, a configuration is shown in which a vertical wing 48 and a horizontal wing 49 are installed on the leeward side of the arm 47 for receiving the wind. With this configuration, the vertical wings 48 flutter in the wind even when the wind speed is low, and it is thought that the natural wind force makes it possible to turn the wind receiving surface of the wind body toward the wind.
In addition, as shown in FIG. 23, by setting the angle of attack so that the wind acts upward on the horizontal blades 49, the force that causes the wind body to tilt to the leeward side during strong winds is directed upward by the horizontal blades 49. It can be expected to have the effect of suppressing the tilt of the wind body, which is offset by the force.

Next, FIGS. 24 to 26 show the operation and control of the floating offshore wind power generator according to the tenth embodiment of the present invention. FIG. 24 is a configuration diagram showing an example of a measurement device, a controlled object, and a signal flow for operating and controlling the screw of the offshore wind power generator described in Examples 3 to 8. FIG.
The wind direction is measured by an anemoscope 51 installed at the upper end of a measurement tower 50 that floats above the sea surface and protrudes upward by a floating body, the information is transmitted as a wind direction signal 52 by a radio signal, and a control device 54 with an antenna 53 installed. receives.
Similarly, the wind speed is measured by an anemometer 55 installed at the upper end of the measurement tower 50, the information is transmitted as a wind speed signal 56 as a radio signal, and is received by a control device 54 having an antenna 53 installed.

The angle of the wind body with respect to the wind direction is measured by an angle meter 57 attached to the rotating ring 17, and the information is received by the control panel 54 as a signal 58 of the mooring device angle via the signal cable. In the same manner as described above, the number of rotations of the wind turbine is measured by the tachometer 59, and the information is received by the control panel 54 as a signal 60 of the number of rotations of the wind turbine via the signal cable.
Further, FIG. 24 shows a configuration in which when an operational abnormality such as a power failure occurs in the ground power system 61, the power system power failure signal 62 is received by the control panel 54 via a communication cable.

FIG. 25 shows, in the tenth embodiment, using a wind direction signal 52, a wind speed signal 56, a rotation ring angle signal 57, a wind turbine body rotation speed signal 60, and a power system blackout signal 62, An example of a block diagram for controlling the operation of the wind power generator by a screw operation/stop command signal 63 is shown.

FIG. 26 shows an example of a flow diagram of the operation/control logic for the screw within the control panel in the tenth embodiment. This figure uses a graphic 64 indicating the start or end of the flow, an arrow 65 indicating the input of each signal information, a graphic 66 indicating judgment using each signal information, and a graphic 67 indicating screw operation or stop. , shows an example of the control logic flow.

This application is for floating offshore wind power generators, which are expected to increase in number and size in the future, and can be stably moored at a fixed position even on the sea surface of the coast, which is a little away from the coast, and requires less time and effort to install. Therefore, it is possible to reduce the construction cost. In addition, since it is possible to reduce the value-added equipment required in conventional wind power generators, such as by replacing the functions of conventional yaw actuators with screws, it is possible to reduce construction and maintenance costs.
At the same time, we can make use of our ship-related technology and experience.

1 Pedestal 2 Support 3 Rotating Shaft 4 Bearing 5 Hub 6 Blade 7 Nacelle 8 Generator 9 Wind Body 10 Fixed Shaft 11 Hollow Rotating Shaft 12 Gear 13 Main Float 14 Strut 15 Fishing Rod 16 Weight 17 Rotating Ring 18 Hook 19 Auxiliary Rope 20 Auxiliary float 21 Mooring rope 22 Anchor 23 Mooring cable body 24 Temporary support 25 Stopper 26 Auxiliary float A
27 auxiliary float B
28 Connecting rope 29 Screw 30 Propulsion device 31 Brake disc 32 Brake device 33 Center ring 34 Pin 35 Outer ring A
36 outer ring B
37 blade beam 38 flat plate 39 spoke 40 spoke beam 41 cylindrical frame 42 generator unit 43 generator base 44 generator 45 generator drive shaft 46 wheel 47 arm 48 vertical wing 49 horizontal wing 50 instrumentation tower 51 wind vane 52 wind direction Signal 53 Receiving antenna 54 Control panel 55 Anemometer 56 Wind speed signal 57 Rotating ring angle meter 58 Rotating ring angle signal 59 Wind body tachometer 60 Wind body rotation speed signal 61 Power system 62 Power system blackout signal 63 Screw drive/stop signal 64 Graphic representing the start or end point of the flow on the flowchart 65 Input of signal information on the flowchart 66 Graphic representing judgment using signal data on the flowchart 67 Operation or stop of the screw on the flowchart figure to represent

Claims (10)

Installed on the ocean, a plurality of blades radially mounted in a direction perpendicular to a rotation axis with a horizontal central axis form a wind turbine, and the wind blows against the wind turbine and generates a force on the blades. In an offshore wind power generator that generates electricity by transmitting the rotational force of the vehicle body to the drive shaft of the generator, the rotating shaft is a solid round bar or hollow round bar supported in the horizontal direction, and the rotating shaft is perpendicular to the rotating shaft. A plurality of blades are mounted radially to form a wind-body, and said rotating shaft is supported by a bearing attached to a support placed on a pedestal above sea level and away from sea level, and The pedestal is fixed to the upper end of the main float floating on the sea surface, centered below the center of the wind turbine body, and to the upper end of the post with a circular cross section installed in the center of the main float upward. A fishing rod with a weight attached to the lower end is installed in the sea below the main float, and has a sliding surface that matches the cross-sectional shape of the support, and is fitted to the support. A rotatable ring whose outer periphery is rotatable in a horizontal direction is attached to each other, and one end of a plurality of mooring ropes is connected to a plurality of anchors radially installed on the sea floor centering on the main float, and the mooring ropes are connected to each other. The other end of is connected to a plurality of auxiliary floats floating on the sea surface, and the auxiliary float and the outer surface of the rotating ring are connected with a plurality of auxiliary ropes, and the plurality of auxiliary ropes are almost Pulled toward the rotatable ring with uniform tension and tied to the outer surface of the rotatable ring, the primary float is surrounded by the plurality of auxiliary floats and simultaneously floats on the sea surface. A floating body characterized by being able to rotate horizontally clockwise or counterclockwise 360 degrees on a surface, and the wind body can also rotate horizontally clockwise or counterclockwise 360 degrees on the sea surface. type offshore wind power generator.
A plurality of auxiliary floats according to claim 1 are floated on the sea surface between the mooring rope according to claim 1 and the auxiliary rope according to claim 1, and one of the plurality of auxiliary floats One of the plurality of auxiliary floats is connected to the mooring rope, another one of the plurality of auxiliary floats is connected to the auxiliary rope, and the plurality of auxiliary floats are connected to each other by a connection rope, thereby reducing the difference in tide level. 2. The floating offshore wind power generator according to claim 1, characterized in that it can be used even on the sea surface in a sea area with a large .
A plurality of propulsion devices, each having a screw or the like for generating propulsive force in the forward or rearward direction, are attached to the underwater portion of the outer wall of the main float according to any one of claims 1 and 2 at an angle of attachment to the main float. By fixedly attaching the screw, it is possible to rotate the main float horizontally clockwise or counterclockwise 360 degrees at the sea surface by the driving force of the screw. 3. The floating offshore wind power generator according to claim 1, wherein the wind turbine body according to any one of claims 1 and 2 can be oriented in any direction on the sea surface.
A brake disc is attached to the strut according to any one of claims 1 to 3, and the brake disc is sandwiched between the rotating rings according to any one of claims 1 to 3. The horizontal rotation of the wind turbine body according to any one of claims 1 to 3 is stopped by installing a brake device that applies a brake to the brake disk to stop the movement of the support in the rotational direction. The floating offshore wind power generator according to any one of claims 1 to 3, characterized in that it can
The rotating ring according to any one of claims 1 to 4 is configured to rotatably hold the support column according to any one of claims 1 to 4, while tilting the support column in the front-rear direction or the left-right direction. By providing a universal joint that permits, even if the wind turbine body according to any one of claims 1 to 4 is tilted in the front-rear direction or in the left-right direction due to waves on the sea surface, it can rotate in the horizontal direction at the sea surface. The floating offshore wind power generator according to any one of claims 1 to 4, characterized in that there is a
For the plurality of blades according to any one of claims 1 to 5, in the middle of the blade at the position of the same radius from the center of the rotating shaft according to any one of claims 1 to 5, or the blade The tips of the blade beams are connected with each other with the blade beams, or after connecting the blade beams with the blade beams, the blade beams are connected with a flat plate to form the wind body. 6. The floating offshore wind power generator according to any one of 5.
A plurality of spokes having the same radius from the center of the rotating shaft are installed on the rotating shaft according to any one of claims 1 to 5 radially in a direction perpendicular to the rotating shaft, and the spokes The ends of the blades are connected to each other by spoke beams, and a plurality of blades are radially installed from the ends of the spokes in the outer peripheral direction, and the ends of the blades are connected by the blade beams, or the ends of the blades are connected by the blade beams. The floating offshore wind power generator according to any one of claims 1 to 5, characterized in that a wind turbine is formed by connecting the blade beam and the blade beam with a flat plate.
The tips of the blades according to any one of claims 1 to 5 are separated from each other by a radius of the same length as the length from the rotating shaft to the tip of the blade according to any one of claims 1 to 5, and A wind turbine body is formed by connecting with a cylindrical frame having an outer surface, and a table movable in a direction toward the cylindrical frame is mounted on the pedestal according to any one of claims 1 to 5, A generator having a drive shaft with a wheel attached to the tip is installed on the table to form a generator unit, and the table is moved toward the rotating cylindrical frame, The floating body according to any one of claims 1 to 5, wherein the wheels rotate in contact with the outer surface of the cylindrical frame, and the drive shaft of the generator rotates to generate power. type offshore wind power generator.
An arm is installed horizontally on the upper end of the column according to any one of claims 1 to 8, and the wind turbine body according to any one of claims 1 to 8 is installed at the windward end of the arm. By installing a vertical wing and a horizontal wing having an angle of attack against the wind at the leeward end of the arm, the wind body faces the wind and the wind body moves to the leeward side due to the wind force. The floating offshore wind power generator according to any one of claims 1 to 8, characterized in that the collapse of the wind power generator is suppressed.
The floating wind power generator according to claim 3 is provided with a control panel for controlling the operation and stop of the screw according to claim 3 , and the control board is located near the floating offshore wind power generator. A wind direction signal measured by an installed anemoscope, a wind speed signal measured by an anemometer installed near the floating offshore wind power generator, and an angle of the rotating ring attached to the rotating ring according to claim 3 . A signal of the wind turbine, a signal of the rotation speed of the wind turbine that is attached to the wind turbine according to claim 3 , and a signal of the operation state of the power system on the ground are received, and these signals are used to operate the screw. - Floating offshore wind power generator according to claim 3 , characterized in that the wind turbine body can be maintained in an appropriate operating state under the operating environment by controlling stopping.

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