JP2008063960A - Ocean float type wind and water turbine fluid extracting power generating facilities - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save the construction cost of wind and water power generating facilities which generate power by a vertical rotary shaft type wind and water turbine on a floating body floating on the ocean. <P>SOLUTION: A pair or more of vertical rotary shaft type wind and water turbines are provided on a floating body. Each pair of wind and water turbines are rotated in the directions opposite to each other. By so doing, the reaction force produced by rotating force of the wind and water turbine is offset. As a result, the rotating force produced by the floating body due to the reaction force to the rotating force of the wind and water turbine is eliminated to facilitate a mooring mechanism of the floating body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an offshore floating windmill fluid extraction power generation facility that generates power by driving a generator by converting a fluid force into a rotational force by a windmill and a floating body floating above the ocean.

It is desirable to install the wind-hydraulic power generation equipment that drives the generator by converting the fluid force into the rotational force in a place where a strong fluid force can be obtained. In this sense, there are many places on the ocean where there are fewer obstacles than on land and it is easy to obtain a stable and strong fluid. In Patent Document 1, a super large floating offshore airport using a catamaran is created, and power consumption at the airport is covered by wind power generation equipment on the deck, and fresh vegetables can be harvested in the winter at the bottom of the wind power generation facility. It is disclosed that a surplus electric power obtained from wind power generation is created by creating a simple greenhouse.

Up to now, offshore power generation facilities have been constructed by embedding a foundation on a relatively shallow seabed with a depth of 15 meters or less, starting a support tower on the ocean, and building a power generation facility consisting of a windmill and a generator on top of it. However, the construction cost was high because the foundation was buried under the sea, and the installation location was limited to relatively shallow waters, so the choice of installation location was narrow. On the other hand, if a floating body is floated on the ocean, and a windmill and power generation equipment are installed on this floating body, a mooring mechanism for mooring the floating body is required. Can be reduced. Non-Patent Document 1 includes a research study to examine the technical and economic feasibility of a floating offshore wind power generation system at a distance of 10 km or more offshore from December 2005 to March 2007. It is carried out by the Research Institute for Technology Development and the University of Tokyo Graduate School of Engineering.

However, even in this floating power generation facility, when a horizontal rotating shaft propeller type wind turbine is used, since the rotating shaft of the propeller type wind turbine is horizontal, water and a heavy generator are integrated on the top of the support tower. Since it needs to be installed, the position of the center of gravity of the whole floating body becomes high, and the stability of the floating body decreases. In order to increase the stability of the floating body, the size of the floating body may be increased. However, the construction cost increases as the floating body increases, which is not preferable. Compared with such a propeller-type horizontal rotary wind turbine, as disclosed in Patent Documents 2 and 3 by the inventor of the present application, a floating power generation using a vertical rotary wind turbine such as a straight-wing wind turbine In the case of equipment, since the rotation drive shaft of the wind turbine can be extended downward and coupled to the generator room installed above and below the floating body, there is an advantage that the center of gravity is lowered and the stability of the entire floating body is increased. Therefore, in the present invention, a plurality of vertical rotating shaft wind turbines are stacked in multiple stages so that their rotating shafts are coaxial, thereby improving the stability of the floating ship. Although it is an example of application on land, regarding a wind turbine in which the rotation shafts of a plurality of impellers are coaxial, in Patent Document 4, five Savonius-type wind turbines are stacked coaxially, and a generator is connected to one end thereof. It effectively captures wind energy at different altitudes. In Patent Document 5, a low-speed crossflow type windmill is placed on the upper part and a high-speed Darrieus type windmill is placed on the lower part, and the center axis of rotation of one windmill is inserted into the hollow rotation axis of the other windmill. It is possible to generate electricity at a high rate even up to wind power. Although such a proposal is good on land, since the floating body that supports the wind turbine receives the rotational force of the wind turbine, a rotational force in the horizontal direction that is the same as the rotational direction of the wind turbine is generated in the floating body. Since this rotational force needs to be absorbed by a mooring mechanism that anchors and fixes the floating body, the larger the rotational force, that is, the power generation output, the stronger the mooring and the greater the weight and the higher the strength of the mooring mechanism. In this case, there is also a disadvantage that the construction cost is increased.

When the above-mentioned references are integrated, it is necessary to stack a plurality of vertical rotating shaft wind turbines in multiple stages and make the rotating shafts coaxial so as to improve the stability of the floating ship. Therefore, in order to solve these problems, in the present invention, by rotating a plurality of impeller wind turbines in the opposite directions on the same axis, the floating body supporting the wind turbines cancels the rotational force of the wind turbines. A device for simplifying the mooring mechanism for fixing the mooring is made.

JP 2004-256084 A JP 2003-206848 A JP 2003-206849 A JP 2002-130110 A JP 2006-132514 A Ocean Policy Research Foundation Newsletter No.140 issued on June 5, 2006

The present invention has been made in view of the above-described problems. That is, an object of the present invention is to improve the stability of the windmill and the floating ship, to simplify the mooring mechanism of the floating ship, and to relatively improve the facility location, in order to eliminate the disadvantages of the conventional offshore wind hydroelectric power generation equipment. Is to provide offshore wind and hydroelectric power generation equipment with a wide range of choice and low construction costs.

Therefore, the present invention aims to stabilize the windmill and the floating ship, and to make the mooring mechanism of the floating ship simple, the impellers of a pair of upper and lower vertical rotating shaft wind turbines that are rotating reversely to each other are geared or the like. The speed increasing means is used to drive the rotating element of the rotary generator to extract electric energy.

In the present invention, a generator is driven by a wind turbine on a floating body floating on the ocean. In order to fix the floating body at a predetermined position by a mooring mechanism, the wind turbine is a vertical rotating wind turbine having a vertical rotating shaft, and a plurality of vertical rotating shaft wind turbines are provided on the floating body, and each pair of wind turbines is provided. The rotation directions of one wind turbine and the other wind turbine in the vehicle are selected to be opposite to each other, and the generator is driven by the rotation shaft of each wind turbine.

In the present invention, the impellers of the two wind turbines in each pair of wind turbines can be arranged side by side on the same vertical axis, and the rotation shafts of the wind turbines can be arranged concentrically. In this case, the pair of generators driven by each pair of wind turbines may be arranged side by side on the same vertical axis in the vicinity of the lower end portion of the rotating shaft of the wind turbine. Furthermore, in the present invention, the wind turbine can be a straight airfoil wind turbine. When using straight airfoil wind turbines, the wind speed increases as the altitude from the surface increases, so the diameter of one impeller in each pair of wind turbines can be different from the other. desirable.

As described above, according to the present invention, an impeller for a wind turbine is provided on a floating body floating on the ocean, and an impeller for a water turbine is provided below the floating body, thereby driving the generator via a gear-type gearbox. When the power generating equipment is installed and the floating body is fixed at a predetermined position by a mooring mechanism, the wind turbine is a vertical rotating shaft type wind turbine having a vertical rotating shaft, and a plurality of vertical rotating shaft type wind turbines are installed on the floating body. Provided, the rotation direction of one wind turbine and the other wind turbine in each pair of wind turbines is selected to be opposite to each other, and the generator is driven by the rotation shaft of each wind turbine, so that the rotational force rotating in the opposite directions to each other There is no need to increase the mechanical strength of the mooring mechanism for mooring the floating body by counteracting the reaction forces acting on the floating body. Therefore, it can be installed not only in shallow waters but also in relatively deep waters, so it has a great economic effect.

Hereinafter, an effective embodiment of the present invention will be described in detail with reference to FIGS. In the drawings, the same parts are denoted by the same reference numerals.

FIG. 1 is a schematic configuration diagram in which two sets of wind turbines are provided on a floating ship. In this figure, 1 is a floating body floating on the ocean, on which a pair of generator chambers 2 and 3 for accommodating generators are installed at intervals in the horizontal direction, on the generator chambers 2 and 3. Vertical rotary shaft type wind turbines 10 and 11 in which straight blades 8 and 9 are coupled by vertical rotary shafts 6 and 7 via support mechanisms 4 and 5 are installed. In order to fix the floating body 1, a mooring mechanism 13 stretched between the weight 12 set on the seabed and the floating body 1 is provided. Since the floating body 1 is moored and fixed at a predetermined place on the ocean by the mooring mechanism 13, the mooring mechanism 13 is removed when moving the installation place of the floating body 1, and when the installation place is fixed, the mooring mechanism is again at the destination. If 13 is attached, since the floating body 1 can be moved freely, the selection range of an installation sea area becomes wide. Selection is made so that the rotation directions of the pair of wind turbines 10 and 11 installed on the floating body 1 are opposite to each other. In the case of a straight airfoil wind turbine, this can be easily done by reversing the shape of the blades 8,9. In this way, a pair of vertical rotating shaft type wind turbines installed on the floating body 1 receives wind power on the ocean and rotates in opposite directions to each other by gears installed in the generator chambers 2 and 3, respectively. The gearbox is rotated to generate electricity. The most important thing in the present invention is that the pair of wind turbines installed on the floating body 1 is configured to rotate in opposite directions, and thus acts on the floating body 1 that supports the wind turbine by the rotational force of each wind turbine. The forces cancel each other, and the force due to the rotational force of the windmill does not act on the floating body 1. For this reason, since the force accompanying the rotational force of the windmill to the mooring mechanism 13 is not applied, it is possible to simplify the mooring mechanism and reduce the mechanical strength.

FIG. 2 is a schematic configuration diagram in which two sets of wind turbines having different windmill (impeller) diameters are provided on a floating ship. In this figure, a pair of vertically rotating shaft type wind turbines 10 and 11 having different impeller diameters are arranged in two stages on the same axis. The rotating shaft 16 of the upper windmill 11 passes through the hollow rotating shaft 15 of the lower windmill 10, and extends to the generator chamber 14 on the floating body 1 together with the rotating shafts 15, 16. The gearbox installed inside is rotated and driven to generate electricity. The most important thing in the present invention is that the wind turbine is composed of the straight airfoil wind turbines 10 and 11, and when the wind turbines 10 and 11 are stacked one above the other as described above, the rotating shaft of the wind turbine and the straight airfoil blades 8, In order to prevent contact and interference with each other even if the 9 is deformed, the diameter of the upper windmill 11 is preferably smaller than the diameter of the lower windmill 10. In addition, the opposite may be the case, but generally the wind speed increases as the wind goes up, and the energy density of the wind received by the upper windmill is higher, so in order to equalize the rotational force of the upper and lower windmills It is preferable to reduce the diameter of the upper windmill 11. Further, the rotation directions of the upper wind turbine 11 and the lower wind turbine 10 that are paired are opposite to each other. As a result, the rotational forces of the wind turbines 10 and 11 acting on the floating body 1 cancel each other, and the rotational force of the wind turbine does not act on the floating body 1. Therefore, the structure of the mooring mechanism 13 can be simplified and the mechanical strength can be lowered.

FIG. 3 is a schematic configuration diagram in which two sets of wind turbines and two sets of water turbines are provided above and below the floating ship. In this figure, 1 is a floating body floating on the ocean, on which a pair of generator chambers 2 and 3 for accommodating generators are installed at intervals in the horizontal direction, on the generator chambers 2 and 3. Vertical rotating shaft type wind turbines 10 and 11 in which straight airfoil impellers 8 and 9 are coupled by vertical rotating shafts 6 and 7 through support mechanisms 4 and 5 are installed. The pair of wind turbines 10 and 11 are selected so that the rotation directions are opposite to each other. In the case of a straight airfoil wind turbine, this can be easily done by reversing the shape of the blades 8,9. In this way, a pair of vertical rotating shaft type wind turbines installed on the floating body 1 receives wind power on the ocean and rotates in opposite directions to each other by gears installed in the generator chambers 2 and 3, respectively. The gearbox is rotated to generate electricity. On the other hand, in a pair of turbines 23 and 24 installed under the surface of the water, like a wind turbine, a pair of generator chambers 17 and 18 for storing a generator are installed at horizontal intervals at the bottom of the floating body 1. Under the generator chambers 17 and 18, vertical rotary shaft type turbines 23 and 24, in which the linear airfoil impellers 8 and 9 are coupled by the vertical rotary shafts 21 and 22 via the support mechanisms 19 and 20, respectively, are installed. . And it selects so that the rotation direction of this pair of water turbines 23 and 24 may become mutually opposite. In the case of a straight airfoil wind turbine, this can be easily done by reversing the way the blades 8, 9 are attached and the shape of the leading and trailing edges of the blades. In this way, the pair of vertical rotating shaft type water turbines installed under the floating body 1 receives the flow of the ocean current on the ocean and rotates in opposite directions, and the gears installed in the generator chambers 17 and 18 respectively. The gearbox is driven by rotating to generate electricity. The most important thing in the present invention is that the pair of wind turbines and the pair of turbines installed on the floating body 1 are configured to rotate in directions opposite to each other. The forces acting on the floating body 1 that supports are offset each other, and the force due to the rotational force of the wind turbine does not act on the floating body 1. For this reason, since the force accompanying the rotational force of the wind turbine to the mooring mechanism 13 is not applied, it is possible to simplify the mooring mechanism and reduce the mechanical strength. In order to fix the floating body 1, a mooring mechanism 13 stretched between the weight 12 set on the seabed and the floating body 1 is provided. Since the floating body 1 is moored and fixed at a predetermined place on the ocean by the mooring mechanism 13, the mooring mechanism 14 is removed when moving the installation place of the floating body 1, and when the installation place is fixed, the mooring mechanism is again at the destination. If 13 is attached, since the floating body 1 can be moved freely, the selection range of an installation sea area becomes wide.

FIG. 4 is a schematic configuration diagram in which two sets of wind turbines and two sets of water turbines having different windmill (impeller) diameters are provided above and below the floating ship. In this figure, a pair of vertically rotating shaft type wind turbines 10 and 11 having different impeller diameters are arranged in two stages on the same axis. The rotating shaft 16 of the upper windmill 11 passes through the hollow rotating shaft 15 of the lower windmill 10, and extends to the generator chamber 14 on the floating body 1 together with the rotating shafts 15, 16. The gearbox installed inside is rotated and driven to generate electricity. On the other hand, in the two sets of two turbines 23 and 24 installed under the surface of the water, a pair of generator chambers for storing generators are installed at horizontal intervals at the bottom of the ship 1 like the wind turbine, Under the machine rooms 17 and 18, vertical rotary shaft type water turbines 23 and 24, in which straight airfoil impellers 8 and 9 are connected by vertical rotary shafts 25 and 26, respectively, are installed. And it selects so that the rotation direction of this pair of water wheels 23 and 24 may be mutually opposite. In the case of a straight airfoil wind turbine, this can be easily done by reversing the shape of the blades 8,9. As described above, the two pairs of vertical rotating shaft type turbines installed under the floating body 1 receive the flow of the ocean current on the ocean and rotate in opposite directions to each other, respectively, by the gears installed in the generator chamber 14. The gearbox is rotated to generate electricity. The most important thing in the present invention is that the pair of wind turbines and the two pairs of turbines installed on the floating body 1 are configured to rotate in directions opposite to each other. The forces acting on the floating body 1 that supports are offset each other, and the force due to the rotational force of the wind turbine does not act on the floating body 1. For this reason, since the force accompanying the rotational force of the wind turbine to the mooring mechanism 13 is not applied, it is possible to simplify the mooring mechanism and reduce the mechanical strength. In order to fix the floating body 1, a mooring mechanism 13 stretched between the weight 12 set on the seabed and the floating body 1 is provided. Since the floating body 1 is moored and fixed at a predetermined place on the ocean by the mooring mechanism 13, the mooring mechanism 14 is removed when moving the installation place of the floating body 1, and when the installation place is fixed, the mooring mechanism is again at the destination. If 13 is attached, since the floating body 1 can be moved freely, the selection range of an installation sea area becomes wide.

FIG. 5 is a longitudinal sectional view showing one specific arrangement of the generators in the wind turbine generator room 14 (FIG. 2). In this figure, reference numerals 29 and 30 denote generators housed in the generator chamber 14, which are driven on the outer sides of the rotary shafts 15 and 16 of the wind turbines 10 and 11 via speed increasing gears 32 and 33. In addition, as for 31, the rotating shafts 15 and 16 are supported by the frame 31, and are being fixed on the floating body 1. FIG. The generator 29 is mechanically coupled to the rotating shaft 15 of the windmill 10 drawn into the generator chamber 14 via the gear transmission mechanism 32 and is driven by the windmill 10. Similarly, the generator 30 is mechanically coupled to the rotating shaft 16 (inner side) of the wind turbine 11 drawn into the generator chamber 14 via the gear transmission mechanism 33 and driven by the wind turbine 11. When a pair of generators are juxtaposed horizontally and spaced apart from each other in this way, when checking the generators individually, the other generator can be checked without stopping, so the availability of the windmill and generator can be increased. There are advantages.

FIG. 6 is a longitudinal sectional view showing an arrangement for driving a generator directly in a pair of wind turbines without a speed increasing mechanism. In this figure, a pair of generator chambers 33 and 34 are provided on the floating body 1 so as to be stacked in two stages. The rotating shafts 15 and 16 of the wind turbines 10 and 11 are drawn into the generator chambers 34 and 35, respectively, and are rotatably supported. The rotor 36 of the generator 41 is directly coupled to the rotating shaft 16 of the inner wind turbine 11 extended into the lower generator chamber 34 and rotates together with the rotating shaft 16. A stator 37 of the generator 41 is provided on the outer periphery of the rotor 36. Further, the rotating shaft 15 of the windmill 10 extended into the upper generator chamber 35 is directly coupled to the rotor 39 of the generator 38 and rotates together with the rotating shaft 15. A stator 40 of the generator 38 is provided on the outer periphery of the rotor 39. Each generator is driven by a windmill coupled via a rotating shaft to generate power. Thus, when a pair of generators are arranged in multiple stages, the installation occupation area of the generator room is reduced, so that there is an advantage that the area of the floating body 1 can be reduced and reduced in size.

FIG. 7 is a longitudinal sectional view showing one specific arrangement of the generators in the turbine generator rooms 27 and 28 (FIG. 4). In this figure, reference numerals 29 and 30 denote generators housed in the generator chambers 27 and 28, which are driven on the outer sides of the rotary shafts 25 and 26 of the water turbines 23 and 24 via speed increasing gears 32 and 33. Note that the rotation shafts 25 and 26 are supported by the frame 42 and are fixed to the floating body 1. The generator 29 is mechanically coupled to the rotating shaft 26 of the water wheel 23 drawn into the generator chambers 27 and 28 through the gear transmission mechanism 32 and is driven by the water wheel 23. Similarly, the generator 30 is mechanically coupled to the rotating shaft 25 (inside) of the water turbine 24 drawn into the generator chambers 27 and 28 via the gear transmission mechanism 33 and driven by the water turbine 24. When a pair of generators are juxtaposed horizontally and spaced apart from each other in this way, when checking the generators individually, the other generator can be checked without stopping, so the availability of the windmill and generator can be increased. There are advantages.

FIG. 8 is a longitudinal sectional view showing an arrangement for driving a generator directly in a pair of wind turbines without a speed increasing mechanism. In this figure, a pair of generator chambers 35 and 38 are provided on the floating body 1 so as to be stacked in two stages. The rotating shafts 25 and 26 of the water turbines 23 and 24 are drawn into the generator chambers 43 and 44, respectively, and are supported by the rotors 36 and 39 of the generator. The rotor 36 of the generator 35 is directly coupled to the rotating shaft 26 of the outer water turbine 23 extended into the lower generator chamber 44 and rotates together with the rotating shaft 26. A stator 37 of the generator 35 is provided on the outer periphery of the rotor 36. Further, the rotating shaft 25 of the water turbine 24 extended into the upper generator chamber 43 is directly coupled to the rotor 39 of the generator 38 and rotates together with the rotating shaft 25. A stator 40 of the generator 38 is provided on the outer periphery of the rotor 39. Each generator is driven by a windmill coupled via a rotating shaft to generate power. Thus, when a pair of generators are arranged in multiple stages, the installation occupation area of the generator room is reduced, so that there is an advantage that the area of the floating body 1 can be reduced and reduced in size.

According to the present invention, a plurality of vertical rotating shaft type wind turbines and water turbines are provided on a floating body floating on the ocean, and the rotation directions of one wind turbine and the other wind turbine in each pair of wind turbines are selected to be opposite to each other. Since the generator is driven by the rotating shaft of each wind turbine, there is no need to increase the mechanical strength of the mooring mechanism for mooring the floating body by counteracting the reaction forces acting on the floating body by the rotational forces rotating in opposite directions to each other. . Therefore, it can be installed not only in shallow waters but also in relatively deep waters, so it has a great economic effect. Furthermore, using the electric energy generated by this wind turbine, the production of hydrogen-generating metals such as caustic soda, sodium and magnesium, or fresh water by electrolysis of seawater on the marine resources collection site, and the products are landed at the port of call. As a result, energy loss during production, storage, and transportation can be eliminated, and the efficiency of the entire system can be improved. This has led to a global depletion of resources and high resources, and the rise of resource-providing countries that accompanies this has not only calmed the current situation that is expanding its influence on the international community, but also the inexhaustible clean marine resources. Producing economically without using fossil fuels is an important measure for Japanese industries surrounded by the sea.

Schematic configuration diagram with two sets of windmills on a floating ship Schematic configuration diagram of two wind turbines (impellers) with different diameters provided on a floating ship Schematic configuration diagram with two sets of wind turbines and two sets of turbines installed above and below the floating ship Schematic configuration diagram with two sets of wind turbines and two sets of turbines with different diameters of wind turbines (impellers) provided above and below the floating ship Longitudinal sectional view showing one specific arrangement of the generators in the wind turbine generator room (FIG. 2) A longitudinal sectional view showing an arrangement for directly driving a generator without a speed increasing mechanism for a set of two wind turbines Longitudinal sectional view showing one of the specific arrangements of generators in the generator room for water turbines (FIG. 4) A longitudinal sectional view showing an arrangement for directly driving a generator without a speed increasing mechanism for a set of two wind turbines

Explanation of symbols

1 Floating body 2 Generator room
3 Generator room 4 Support mechanism 5 Support mechanism 6 Windmill rotating shaft 7 Windmill rotating shaft 8 Straight blade (blade)
9 Straight wing (blade)
10 Vertical-shaft impeller 11 Vertical-shaft impeller 12 Anchor
13 mooring mechanism 14 generator chamber 15 outer rotation shaft 16 inner rotation shaft 17 generator chamber 18 generator chamber 19 support mechanism 20 support mechanism 21 turbine rotation shaft 22 turbine rotation shaft 23 turbine (vertical axis turbine)
24 water wheel (vertical axis water wheel)
25 inner rotating shaft 26 outer rotating shaft 27 generator chamber 28 generator chamber 29 generator 30 generator 31 rotating shaft support frame 32 speed increasing gear 33 speed increasing gear 34 generator chamber 35 generator chamber 36 rotor ( rotor)
37 Stator
38 Generator 39 Rotor
40 Stator
41 Generator 42 Rotating shaft support frame 43 Generator room 44 Generator room

Claims (4)

Vertical rotating shaft type wind turbines with two sets installed on a floating ship sailing or moored off the ocean or under the sea surface or on the sea surface and under the sea surface are stacked in multiple stages with the adjacent or rotating shafts concentric. An offshore floating-type wind-hydraulic fluid extraction power generation facility characterized in that the rotation directions of the wind turbine and the other wind turbine are set opposite to each other and the generator is driven by the respective rotation shafts of each wind turbine. The two generators driven by the two wind turbines in which the rotation shafts according to claim 1 are concentrically stacked in a multi-stage manner are arranged side by side above and below the rotation shafts of the wind turbines. The offshore floating type hydro-hydraulic fluid extraction power generation facility described. The wind turbine according to claim 1 is characterized in that the plane shape of the blades is a straight airfoil, and the upper and lower arms supporting the straight blades are also blade cross-sectional shapes. Power generation facility. 5. The offshore floating type wind hydraulic fluid extraction power generation according to claim 1, wherein the diameter of one impeller is different from or equal to the diameter of the other impeller in the straight airfoil wind turbine according to claim 4. Facilities.

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