JP2003307173A - Buoyancy type power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buoyancy type power generation device to make efficient power generation through utilization chiefly of the kinetic energy of a one-direction flow such as a river flow, sea current, etc., having a very small fall, and reciprocative flows due to the ebb and flood or the like, in which the influence upon the natural environment is lessened. <P>SOLUTION: The buoyancy type power generation device includes a water wheel 1 structured so that a plurality of recessed rotary vanes 5 are arranged around an inner cylinder 2 centering on a rotary shaft 6 and that the rotary vanes 5 open at a specified angle only on the side of receiving the water flow by their recessed surfaces and are closed on the opposite side, and the inner cylinder 2 is given such a buoyancy as to support the deadweight of the device or a plurality of buoys 3 are arranged in line in the width direction of the water flow to support the whole device by their buoyancies. It is arranged so that rotation is generated while the upper or lower situated vanes 5 receive water flow, and a generator 4 is installed inside the inner cylinder 2 or each buoy 3, and power generation is conducted by utilizing one-direction flow or reciprocative flows due to the natural energy. The device may serve well even without any weir, but if installed on any existing weir at a river, the initial period construction costs can be reduced to a great extent. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a water turbine having a structure in which a rotary blade around a horizontal axis opens only on the side where a concave surface receives a water flow and closes on the opposite side, and is supported by a floating body. The present invention relates to a floating power generator that mainly uses kinetic energy of a unidirectional flow such as a river flow or a tidal flow or a reciprocating flow caused by a tide.

[0002]

2. Description of the Related Art In recent years, micro hydropower has attracted attention due to the fact that there are few suitable sites for dam construction to construct conventional dams or weirs and to utilize the energy of the head of water. Although turbines and tubular turbines are being adopted, they still require dams or weirs, and their effects cannot be enhanced under extremely low head conditions. In addition, dams and weirs have a problem that the amount of stored water decreases year by year due to the accumulation of sediment. Some floating-type power generators have been proposed, but all of them are designed to contact the lower part of the turbine with fixed rotors, which is not efficient and requires a larger turbine diameter compared to the contact part. It has not been adopted because of problems such as not getting it. Also, in tidal current power generation, power generation using potential energy due to water level difference has been put into practical use in other countries, but power generation using that kinetic energy is endowed with its natural environment such as the Seto Inland Sea in Japan. Nevertheless, it has not been realized yet.

[0003]

DISCLOSURE OF THE INVENTION The present invention improves the above-mentioned drawbacks of the micro-hydroelectric power generation, reduces natural alteration and sedimentation of sediment, and is mainly applied to a water flow having a very small head. It is an object of the present invention to provide a floating power generation device characterized by being capable of efficiently generating power by absorbing kinetic energy and being also applicable as a power generation device using a reciprocating flow or tidal current due to tidal waves or the like.

[0004]

According to a first aspect of the present invention, there is provided a floating power generating apparatus having a horizontal rotating shaft 6 for achieving the above object.
Has a plurality of rotary blades 5 having a concave shape with a curved surface or an inclined surface around the inner cylinder 2, and the rotary blades 5 with respect to the outer peripheral surface of the inner cylinder 2 only on the side where the concave surface receives the water flow. In order to open and close on the opposite side, the lower part is connected to the inner cylinder 2 via the small shaft 8 and the water turbine 1 provided with a means for preventing the opening from exceeding a predetermined angle is used. Both ends thereof are supported by rotating shaft bearings 7 in the width direction, and buoyancy is applied to the inner cylinder 2 so that the lower rotor blade 5 receives a water flow on its concave surface and a part of the water turbine 1 rotates in the water. The generator 4 is connected to the bearing 7, the rotor thereof is connected to the rotary shaft 6, the rotary shaft bearings 7 at both ends are provided with mooring means, and power is generated using a unidirectional flow such as a river flow. Is characterized by.

According to a second aspect of the present invention, in the floating type power generator, the same turbine 1 as that of the preceding paragraph is used, the rotary shaft 6 is supported in the width direction of the water flow by the rotary shaft bearings 7 at both ends thereof, and the upper rotary blades 5 are the same. To receive the water flow near the water surface in the concave surface, the water turbine 1 rotates,
Buoyancy is applied to the inner cylinder 2 and the tips of the rotor blades 5, the generator 4 is connected to the rotary shaft bearing 7, the rotor is connected to the rotary shaft 6, and mooring means is provided on the rotary shaft bearings 7 at both ends. It is characterized in that power is generated using a unidirectional flow such as a river flow or tidal flow, or a reciprocating flow due to tidal flow.

According to a third aspect of the present invention, in the floating type power generator, a plurality of floating bodies 3 are provided in parallel in the width direction of the water flow using the water turbine 1 similar to the preceding paragraph, and they are connected by a connecting body 3A to form an upper side or a lower side. The water turbine 1 is supported by a floating body 3 via a rotating shaft bearing 7 so that the rotary blade 5 on the side rotates by receiving a water flow at its concave surface, and a generator 4 is provided inside the floating body 3 to rotate its rotor. The floating body 3 is connected with the mooring means 6, and mooring means is provided on the floating body 3 to generate electric power by utilizing a unidirectional flow such as a river flow or a tidal flow or a reciprocating flow due to a tidal flow.

A floating body power generator according to a fourth aspect uses the same turbine 1 as in the preceding paragraph, and a plurality of floating bodies 3 are provided in parallel in the width direction of the water flow, and they are connected by a connecting body 3A.
The rotor 1 on the upper side receives the water flow on its concave surface on either side before or after the water flow direction of the water turbine 1 so as to rotate in the water near the water surface.
, And on the opposite side thereof, two water turbines 1 are supported by a floating body 3 via a rotating shaft bearing 7 so that the lower rotary blade 5 receives a water flow on its concave surface and rotates. A generator 4 is connected to the rotary shaft 6, and mooring means is provided on the floating body 3 to generate electric power by utilizing a reciprocating flow due to tidal waves.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an embodiment of the floating type power generator of claim 1, and FIG. 2 is a sectional view taken along the line XX in FIG.
However, in FIG. 2, the display of the side wall on the front side is omitted.
First, the water turbine 1 has an inner cylinder 2 centered on a horizontal rotation shaft 6.
A plurality of rotary blades 5 having a concave shape with a curved surface or a slanted surface in the direction perpendicular to the axis are arranged around the shaft, and a blade bearing 5A is provided below the rotary blades 5 as shown in FIG. It is assumed to be connected to the side plate 2A and the rib 2B. The small shaft 8 is attached at a predetermined height from the outer peripheral surface of the inner cylinder 2, and the blade foot 5B is provided below the rotor blade 5 by a predetermined dimension from the bearing 5A. When opened at a predetermined angle, the wing foot 5B comes into contact with the outer surface of the inner cylinder 2 and does not open further. However, other means may be considered for preventing the rotary blade 5 from opening beyond a predetermined angle, for example, the wing foot 5B.
Instead of the above, a protrusion 2C (shown by a virtual line) may be provided on the outer surface of the inner cylinder 2 so that the lower portion of the rotary blade 5 comes into contact with the protrusion 2C at a predetermined angle.

The inner cylinder 2 is provided as a large-diameter hollow body with a power generator 4 having a speed increasing gear built therein, and supports the total weight of the apparatus by its buoyancy in water, and a part of the upper side of the rotary blade 5. Should be exposed in the air. The arm 11 and the water wheel foot 9 are connected to the rotary shaft bearings 7 at the left and right ends, and the other end of the arm 11 is swingably fixed to a concrete side wall via a mooring shaft 12. Therefore, the water turbine 1 can move up and down according to the increase / decrease of water in the river, and the water wheel feet 9 land to protect the water wheel 1 in the normal period when the water level is below a predetermined amount, but when the water level increases, it moves upward and flows. Try to widen the road. In the floating type power generator having such a structure, the lower rotary blade 5 is opened by its own weight to receive a water flow in the concave surface and automatically opens at a predetermined angle with respect to the inner cylinder 2,
As it rotates and returns to the upper side, the rotor blade 5 automatically closes due to its own weight and the resistance on the convex surface side, and since a part of the upper side is exposed in the air, it is possible to reduce the fluid resistance. The water turbine with a smaller diameter than the conventional turbine with a fixed structure can absorb the water flow energy much more efficiently. The shallow part of the river is a gutter, and side walls are provided on the left and right of the deep part and the device is installed between both side walls, so that part of the water flow is blocked, and naturally a drop occurs before and after the water wheel. However, if the sand removal gate 15 shown in FIG.
By opening, if the water flow is not provided, the utilization efficiency of the water flow is reduced, but the earth and sand flow widely under the water turbine 1 and are not accumulated in any case. Further, with respect to the suspended matter, a grid 17 is provided on the upstream side of the floating body 3, and the lattice 17 is guided to the side groove to flow downstream or be removed. Other forms of the mooring means are conceivable. For example, the mooring line 13 may be used as in the example shown in FIG. 9 to be described later, and the present invention is not limited to the means.

FIG. 3 is a perspective view of an embodiment of the floating body type power generator of claim 2, and FIG. 4 is a sectional view taken along line YY of FIG.
However, in FIG. 4, the display of the front side wall is omitted.
The water turbine 1 has the same structure as that of the first embodiment, but the rotor blade 5 is provided with a blade cavity 5C inside toward the tip as shown in FIG. 6 so as to have a predetermined buoyancy. The inner cylinder 2 is provided with a generator 4 as a large-diameter hollow body having a step-up gear built therein, the buoyancy of the inner cylinder 2 and the rotor blade 5 supports the weight of the device, and the upper side of the rotor blade 5 is slightly in the air. To be exposed to. In this device, the upper rotor blade 5 is installed so that its concave surface receives the water flow. Therefore, the rotor blade 5 opens near the water surface by its own buoyancy force and water flow, and as it rotates and moves away from the water surface, its own buoyancy force and convex surface resistance. To close automatically. The operation of the arm 11 connected to the rotary shaft bearing 7, the mooring shaft 12, and the water wheel foot 9 is the same as that of the embodiment of claim 1, but the buoyancy of the water wheel 1 is set to slightly exceed the weight of the device. Therefore, at the time of increasing water, the water turbine 1 moves to the upper side to expand the flow path, and the upper rotor 5 is always positioned near the water surface. Grid 1
7. The functions of the gutter 7, the gutter, the sand removal gate 15 and the sand removal door 16 are claimed in claim 1.
Is the same as that described in the embodiment. The floating type power generator having such a structure is advantageous in a unidirectional flow having a relatively fast flow, because the upper rotor blade 5 receives a water flow near the water surface with the most movement in its concave surface. Further, since the entire water turbine 1 is below the water surface, the diameter of the water turbine 1 can be made relatively smaller than that of the water turbine 1 of the first aspect.

FIG. 7 is a perspective view of an embodiment of the floating type power generator of claim 3, and FIG. 8 is a sectional view taken along line ZZ of FIG.
However, in FIG. 7, the display of the side wall on the front side is omitted.
A plurality of floating bodies 3 are provided in parallel in the width direction of the water flow, and their upper sides are connected by a connecting body 3A. The floating body 3 is a hollow body having a predetermined buoyancy, and has an elongated boat shape so as to minimize the water flow resistance. On the downstream side of the floating body 3, the water turbine 1 is supported by the floating body 3 via a rotary shaft bearing 7 so that the upper rotary blade 5 receives a water flow at its concave surface and rotates in water.
The generator 4 with a built-in gearbox is installed inside the
Connected with. The water turbine 1 has the same structure as that of the embodiment of claim 2, and the entire apparatus is supported by the buoyancy of the inner cylinder 2 and the floating body 3, and all the rotary blades 5 are below the water surface.
It is preferable to give buoyancy to the rotor blade 5 because the above-mentioned effect can be obtained, but it is not an essential requirement. A short arm 14 is projected on the upstream side of the floating body 3, and a crank is configured with the arm shaft 10 and the arm 11. The other end of the arm 11 is fixed to a concrete side wall via a mooring shaft 12. The floating body type power generator having such a structure can not only stably maintain the position of the water turbine 1 with respect to the water surface, but also move the intermediate position of the water turbine 1 to the floating body 3
It is suitable for installation in a river with a wide river, etc.

If the flow of water is so strong that the energy cannot be absorbed by one unit of the present apparatus, a plurality of floating type power generators according to claim 1, claim 2 or claim 3 may be provided at appropriate intervals. Alternatively, a plurality of water wheels 1 may be connected to one set of mooring means.

FIG. 9 is a cross-sectional view showing an embodiment of the floating type power generator of claim 3 which utilizes a reciprocal flow due to tidal waves, etc., and shows a scene where the ocean current flows from the right to the left in a solid line and in the opposite direction. Is indicated by a virtual line. The water turbine 1 is provided in the center of the floating body 3 and the mooring lines 13 are provided at both the front and rear ends, although the configuration is similar to that shown in FIG. In the floating type power generator having such a structure, in the same manner as the embodiment described in the preceding paragraph, with respect to the water flow from the right to the left in the figure, the upper rotor blade 5 receives the water flow and rotates the water turbine 1, and the opposite direction. With respect to this water flow, the lower rotary blade 5 receives the water flow and rotates to generate electricity in the same manner as in the first embodiment. Therefore, it is desirable that the rotor blade 5 has a buoyancy force that balances with its own weight so that the rotor blade 5 opens with less resistance on either side. This device has an advantage that the structure can be simplified as compared with a floating body type power generator of claim 4 described later.

The above-described embodiments of claim 1, claim 2 and claim 3 can be applied to a unidirectional flow due to a tidal current. In particular, as shown in the embodiment shown in FIG. 9, the water flow due to the tidal current can be received on both the upper side and the lower side of the rotor blade 5, but the water flow can be received on the upper side so that the entire turbine 1 rotates in water. This is advantageous because the water turbine 1 can have a relatively small diameter.

FIG. 10 is a perspective view showing an embodiment of the floating body type power generator of claim 4 which utilizes a reciprocating flow due to tidal waves and the like.
FIG. 10 is a cross-sectional view taken along the line WW of FIG. 2 water wheels 1
Are installed symmetrically with respect to the center line of the floating body 3, and the rotary blades 5 of the upstream turbine 1 are below the water surface, leaving the tip slightly above the water surface. Rotate inward. As a result, a slight drop is caused to flow to the downstream side, and the downstream side water turbine 1 is received by the lower rotary blade 5 and similarly rotates inward. The floating-type power generator having such a structure is used for the water turbine 1 on the upstream side with respect to the water flow from the right to the left in the figure.
Is rotated, and subsequently the water turbine 1 on the downstream side is rotated.
Since it works similarly for the water flow in the opposite direction, it is possible to collect kinetic energy nearly twice as much as in the embodiment of FIG. 9 to generate electricity. In this embodiment, the mooring means is the mooring rope 1.
However, a crank type having a base provided on a reef or the like and including the arm 11 and the mooring shaft 12 shown in FIG. 1 may be used, and the present invention is not limited to that means.

[0017]

Since the floating power generator according to the present invention is constructed as described above, it has the following effects.

In the floating type power generator of claim 1, the lower rotor blade 5 receives the water flow on the concave surface and automatically opens at a predetermined angle with respect to the inner cylinder 2, and as it moves upward, its own weight and the convex surface side. Automatically closes due to the resistance of, and the upper part is exposed in the air, so the fluid resistance can be kept low, and the water flow energy is much more efficient than the water turbine of the conventional structure in which the rotor 5 is fixed. Can be absorbed. Further, since side walls are provided on the left and right of the deep part of the river and the device is attached between the both side walls, a part of the water flow is blocked and a drop is generated before and after the water wheel 1 to accelerate the water flow on the lower side. And since the water flows under the water turbine 1, regardless of whether or not the sand removal gate 15 is provided,
Sediment accumulation can be avoided.

In the floating type power generator of claim 2, the entire turbine 1 is below the water surface, and the upper rotor blade 5 receives the water flow near the water surface with the most movement in its concave surface to open at a predetermined angle, and then to the lower side. Since it automatically closes as it moves, not only can the fluid resistance be kept low, but water flow energy can be efficiently absorbed by a water turbine having a relatively smaller diameter than the floating type power generator of claim 1. Moreover, although this device blocks a part of the water flow, since water flows both above and below the water turbine 1, it is possible to avoid sedimentation regardless of whether or not the sand discharge gate 15 is provided. it can. The device can also be used for reciprocating flow due to tides.

The floating type power generator according to claim 3 has the same advantages as the floating type power generator according to claim 2 and can stably maintain the position of the water turbine 1 relative to the water surface, and the floating position at the intermediate position in the width direction. It can be installed in a wide unidirectional flow by being supported by 3, and can also be used for reciprocating flow due to tides. For the tidal current, the floating type power generator of the above-mentioned claim 1 and claim 2 can be used, but the structure of claim 3 is particularly suitable for a more severe environment because it supports an intermediate position.

The floating type power generator of claim 4 utilizes a reciprocating flow due to tidal waves, etc., and the water turbine 1 on the upstream side and the water turbine 1 on the downstream side always face each other in opposite directions regardless of the reciprocal alternation of the water flow. Since it rotates under the surface of the water and uses the water flow doubly, it is possible to efficiently absorb the water flow energy. Japan is blessed with an environment where a strong reciprocating flow occurs due to tides such as the Seto Inland Sea, but this device is suitable for utilizing such a natural environment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a floating body type power generator of claim 1;

FIG. 2 is a cross-sectional view taken along the line XX in FIG.

FIG. 3 is a perspective view showing an embodiment of the floating body type power generator of claim 2;

FIG. 4 is a cross-sectional view taken along line YY of FIG.

FIG. 5 is an exploded view showing details of a mounting portion of the rotor blade 5 to the inner cylinder 2;

FIG. 6 is a cross-sectional view showing an embodiment in which buoyancy is applied near the tip of the rotary blade 5,

FIG. 7 is a perspective view showing an embodiment of the floating body type power generator of claim 3;

FIG. 8 is a sectional view taken along line ZZ of FIG.

FIG. 9 is a cross-sectional view showing an embodiment of the floating type power generator of claim 3, which utilizes a reciprocal flow due to tidal waves,

FIG. 10 is a perspective view showing an embodiment of the floating body type power generator of claim 4;

FIG. 11 is a cross-sectional view taken along the line WW of FIG.

[Explanation of symbols]

1 turbine 2 inner cylinder 2A side plate 2B rib 2C protrusion 3 floating body 3A connected body 4 generator 5 rotors 5A wing bearing 5B wings 5C wing cavity 6 rotation axes 7 Rotating shaft bearing 8 small axes 9 Turbine feet 10 arm axis 11 arms 12 mooring shaft 13 mooring lines 14 short arm 15 Exhaust gate 16 sand removal door 17 grid

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[Procedure amendment]

[Submission date] June 9, 2003 (2003.6.9)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Buoyancy generator

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a water turbine having a structure in which a rotary blade around a horizontal axis opens only on the concave surface of the rotary blade and receives the water flow on the opposite side, and the rotary blade is supported by buoyancy. The present invention relates to a buoyancy power generation device that generates electricity mainly using kinetic energy of a unidirectional flow having an extremely low head such as a river flow or a tidal flow or a reciprocating flow caused by a tidal flow or wave force.

[0002]

2. Description of the Related Art Conventional large-scale hydroelectric generators that use dam heads or dams and use the energy of the head of water have a problem of enormous initial cost and destruction of the natural environment. Although cross-flow turbines, tubular turbines, etc. are advantageous for this, they still require a dam or weir with a large head, and their effects cannot be enhanced under extremely low head conditions.
In addition, dams and weirs have a problem that the amount of stored water decreases year by year due to the accumulation of sediment. Several floating-type power generators have also been proposed, but most of them use the apron type of the old open channel type water turbine, and there is no choice but to increase the diameter of the turbine in comparison with the water contact part, resulting in a sufficient economic effect. There are problems such as not being able to obtain it, and it has not spread. Also, in tidal flow power generation, power generation using potential energy due to water level difference has been put into practical use in other countries, but power generation using that kinetic energy is almost realized for the same reason as the above open channel turbine. Not not.

[0003]

DISCLOSURE OF THE INVENTION The present invention improves the above-mentioned drawbacks of the micro-hydroelectric power generation, reduces the alteration of the natural environment and the accumulation of sediment, and is mainly applied to the water flow having a very small head. It is an object of the present invention to provide a buoyancy type power generation device characterized by absorbing the kinetic energy and efficiently generating power, and being applicable as a device for generating power using a reciprocating flow or tidal current due to tidal or wave forces. .

[0004]

A buoyancy type power generator according to claim 1 for achieving the above object comprises a horizontal rotary shaft 6
Has a plurality of rotary blades 5 having a concave shape due to a curved surface or an inclined surface and having a buoyancy near the tip around an inner cylinder 2 having a cavity inside, and the rotary blades 5 receive the water flow at the concave surfaces. The inner cylinder 2 is opened through the small shaft 8 so that the inner cylinder 2 opens on the outer peripheral surface of the inner cylinder 2 only on the open side and closes on the opposite side.
The water turbine 1 is provided with a means for preventing it from opening beyond a predetermined angle and a means for cushioning the impact when it is opened. The buoyancy of the inner cylinder 2 and the rotor blade 5 is set so that the rotor 5 above the inner cylinder 2 receives the water flow near the water surface on its concave surface to rotate the water turbine 1, and the rotating shaft bearing 7 has a generator with buoyancy. 4, the rotor is connected to the rotary shaft 6, the mooring means is connected to the rotary shaft bearings 7 at both ends, and power is generated by utilizing a unidirectional flow such as a river flow or a tidal current. And As another similar means for achieving the above object, Japanese Patent Application No. 2001-317496 is also proposed, which is different from the present invention in that it uses a water turbine having a fixed shaft and a casing. Is.

The buoyancy type power generator according to the second aspect uses the same water turbine 1 having the buoyancy as described above, but a plurality of floating bodies 3 are provided in parallel in the width direction of the water flow for further stabilization. Are connected by a connecting body 3A, and the water turbine 1 is supported by the floating body 3 via a rotary shaft bearing 7 so that the upper or lower rotary blade 5 receives a water flow at its concave surface to rotate the water turbine 1. A generator 4 is provided inside the floating body 3 and its rotor is connected to a rotary shaft 6, and mooring means is provided on the floating body 3 to generate a unidirectional flow such as a river flow or tidal flow or a reciprocating flow due to tidal or wave forces. The feature is that it is used to generate electricity.

A buoyancy type power generator according to claim 3 uses the same turbine 1 as in the preceding paragraph, and a plurality of floating bodies 3 are provided in parallel in the width direction of the water flow, and they are connected by a connecting body 3A to form a floating body 3.
The turbine 5 is connected to the upstream side of the inner cylinder 2 so as to rotate by receiving the water flow near the water surface on the concave surface above the inner cylinder 2, and the rotor blade 5 receives the water flow on the concave surface on the downstream side below. The other turbines 1 are connected to each other so as to rotate, and the turbine 1 which is upstream with respect to the water flow in the opposite direction becomes the downstream side, and the upstream side and the downstream side are respectively replaced so that the two turbines operate in the same manner. Water turbine 1
It is supported by a floating body 3 via a rotary shaft bearing 7, a generator 4 is provided inside one of the floating bodies 3 and its rotor is connected to a rotary shaft 6, and mooring means is provided at least on the left and right ends of the floating body 3. The feature is that power is generated by using a reciprocating flow due to tide and wave force.

A buoyancy type power generator according to a fourth aspect is the buoyancy type power generator according to the first, second and third aspects, wherein the upstream side water flow which faces the inner cylinder 2 and is branched to an upper side and a lower side,
All of them are provided with a means for smoothly guiding them by the inclined plate 18 and colliding them with the rotor blade 5 in the open state.

A buoyancy type power generator according to a fifth aspect is the buoyancy type power generator according to the first and second aspects, in which the weir 20 or the sand discharging gate 15 is provided on the downstream side of the weir 20 or the existing weir 20.
A frame 19 fixed so as to be held by the upstream side surface, the downstream side surface and the upper surface is provided on the left and right of the weir 20, and the water turbine 1 or the floating body 3 is connected to the downstream side of the frame 19 by mooring means. In addition, the inclined plate 18 according to claim 4 is further provided, and a means for preventing the inflow of large floating debris including rock is provided on the upstream side.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an embodiment of the buoyancy type power generator of claims 1 and 5, and FIG. 2 is a sectional view taken along line XX in FIG. However, in FIG. 1, the display of the front side wall is omitted. First, in the water turbine 1, a concave shape is formed around the inner cylinder 2 centering on the horizontal rotating shaft 6 in a direction perpendicular to the axis by a curved surface or an inclined surface, and as shown in FIG. A plurality of rotor blades 5 having 5C are arranged. As shown in FIG. 3, the rotary blade 5 is provided with a blade bearing 5A at its lower portion and is connected to the side plate 2A and the rib 2B of the inner cylinder 2 by a small shaft 8. The small shaft 8 is attached at a predetermined height from the outer peripheral surface of the inner cylinder 2, and the wing foot 5B is provided on the lower portion of the rotary blade 5 so as to protrude from the bearing 5A by a predetermined dimension, and further, on the outer surface of the inner cylinder. Since the projection 2C is provided, the rotary blade 5
When opened at a predetermined angle, the wing foot 5B comes into contact with the outer surface of the inner cylinder 2 and the protrusion 2C and does not open further. Further, as shown in FIG. 4, the rotary blade 5 is provided with a leaf spring 5D at its lower portion as a means for absorbing a shock when it is opened. Naturally, the leaf spring 5D also has an effect of assisting the initial operation when the rotary blade 5 is closed. However, it is conceivable to attach an elastic body instead of the leaf spring 5D as the means for alleviating the impact, and the present invention is not limited to this means. In addition, another form of the means for preventing the rotary wing 5 from opening beyond a predetermined angle is also conceivable. For example, the projection 2C is not provided and only the wing foot 5B has the function, and the impact absorbing means is the wing foot 5B. Or inner cylinder 2
It may be provided on the outer surface, and the present invention is not concerned with the means.

The inner cylinder 2 is provided with a generator 4 as a large-diameter hollow body having a step-up gear built therein. The inner cylinder 2 supports the total weight of the apparatus by the buoyancy of the inner cylinder 2 and the rotary blades 5 while rotating in water. The buoyancy is set so that the upper ends of the wings 5 are slightly exposed in the air.
The arm 11 and the water wheel foot 9 are attached to the rotary shaft bearings 7 at the left and right ends.
The other end of the arm 11 is swingably fixed to the concrete side wall via the mooring shaft 12. Therefore, the water turbine 1 can move up and down according to the increase / decrease of water in the river, and the water wheel feet 9 land on the water wheel 1 to protect the water wheel 1 during the dry season when the water level is below a predetermined amount.
When the water level increases, it moves upward to expand the flow path. Since the rotor blade 4 is provided on the upper side of the inner cylinder 2 so as to receive the water flow on its concave surface, it rapidly opens due to its buoyancy and water flow near the water surface, and as it rotates and moves away from the water surface, its buoyancy and convex surface It closes automatically by resistance. The shallow part of the river is a gutter, and side walls are provided on the left and right of the deep part and the device is installed between both side walls, so that a part of the water flow is temporarily blocked and a drop occurs before and after the water wheel. If the sand discharging gate 15 according to claim 5 is provided, the sand discharging door 16 is opened at a proper time such as when water is increased. In any case, it does not accumulate. In this embodiment, as shown in the figure, the inclined plate 18 according to claim 4 is provided on the front surface of the sand discharging gate 15. Therefore, the upstream side water flow lower than the inner cylinder 2 is guided upward along the inclined plate 18. While being accelerated, it is accelerated and collides with the rotor 5. Even if the small floating debris collides with the water turbine 1, it will flow off to the downstream without any problem, but as a measure against the large floating debris, the grid 17 is provided on the upstream side of the side wall.
Is provided so as to be inclined toward the side groove side from the width direction, and is guided to the side groove to flow downstream or be removed. Other forms of the mooring means are conceivable. For example, the mooring line 13 may be used as in the example shown in FIG. 9 to be described later, and the present invention is not limited to the means. Further, in order to operate the sand discharging door 16, a device therefor is naturally required, but the display is omitted in the figure. In the buoyancy type power generator having such a structure, since the upper rotor blade 5 receives the water flow near the water surface with the most vigorous movement in its concave surface, and the resistance on the convex side of the rotor blade 5 is extremely small,
The kinetic energy of the water stream can be efficiently absorbed. Further, since the entire water turbine 1 is below the water surface, the diameter can be made much smaller than that of the conventional open channel type water turbine 1.

FIG. 5 is a perspective view of an embodiment of the buoyancy type power generator of claims 2 and 5, and FIG. 6 is a sectional view taken along line YY of FIG. However, in FIG. 5, the display of the front side wall is omitted. Two or three floating bodies 3 are provided in parallel in the width direction of the water flow, and their upper sides are connected by a connecting body 3A. The floating body 3 is a hollow body having a predetermined buoyancy, and has an elongated boat shape so as to minimize the water flow resistance. On the downstream side of the floating body 3, the water turbine 1 is supported by the floating body 3 via a rotary shaft bearing 7 so that the upper rotary blade 5 receives a water flow at its concave surface and rotates in water. Has a generator 4 with a built-in gearbox and is connected to the rotary shaft 6. The water turbine 1 has a structure similar to that of the first embodiment, and the entire apparatus is supported by the buoyancy of the inner cylinder 2 and the floating body 3, and the upper ends of the rotary blades 5 are slightly exposed in the air. Buoyancy is also applied to the rotor blade 5 toward the tip, and the effect is as described above. In this embodiment, since the inclined plate 18 according to claim 4 is fixed to the floating body 3, the upstream water flow in the portion lower than the inner cylinder 2 is accelerated along the inclined plate 18 while being accelerated and rotated as described above. Collide with wing 5. In this example, the inclined plate 18 also serves as the water wheel foot 9. However, as in the previous example, the inclined plate 18 may be provided with the sand discharging gate 15 according to claim 5 and fixed to it. Further, on the upstream side of the floating body 3, a short arm 14 is projected, and a crank is configured with the arm shaft 10 and the arm 11.
The other end of 1 is fixed to a concrete side wall via a mooring shaft 12. The function of the grating 17 is the same as in the above example. The buoyancy power generation device having such a structure not only increases the rigidity of the entire device and stably maintains the position of the water turbine 1 with respect to the water surface, but also supports the intermediate position of the water turbine 1 by the floating body 3. Suitable for installation in a large water stream.

FIG. 7 is a cross-sectional view showing an embodiment of the buoyancy type power generator of claim 2 and claim 4 in which a reciprocal flow due to tidal force and wave force is used, and the scene where the ocean current flows from right to left is shown by a solid line. , The scene flowing in the opposite direction is shown by a virtual line.
The structure is similar to that of FIG. 6 described in the previous section, but the water turbine 1 has a floating body 3
The mooring line 13 is provided at the center of the left and right sides of the floating body 3 and a total of four mooring lines 13 are provided. In this embodiment, since the inclined plates 18 according to claim 4 are provided on both sides of the floating body 3 respectively for the forward flow and the backward flow via the inclined plate shafts 18A, the flow from the right to the left in the figure The forward flow inclined plate 18 is stopped at the position of the stop shaft 18B and operates in the same manner as described above, but the backward flow inclined plate 18 has the inclined plate shaft 18A.
Just float around. With respect to the flow in the opposite direction, the water flow moves as shown by phantom lines, and the return flow is guided to the rotary blades 5 opened to the lower side of the inner cylinder 2. However,
Since the water flow resistance of the inclined plate 18 is large, only the outward flow inclined plate 18 is provided or neither of them is provided under the installation condition where a strong mooring means cannot be obtained. In the buoyancy type power generator having such a structure, in the same manner as the embodiment described in the preceding paragraph, with respect to the water flow from the right to the left in the figure, the upper rotor blade 5 receives the water flow and rotates the water turbine 1, and the opposite direction. As shown by the phantom line in the figure, the lower rotor blade 5 receives the water flow and rotates to generate electric power. Therefore, the buoyancy of the rotor blades 5 should not be excessive and should be balanced with its own weight so as to open with low resistance on either side. This device has an advantage that the structure can be simpler than that of the buoyancy type power generator of claim 3 described later.

FIG. 8 is a perspective view showing an embodiment of the buoyancy type power generator of claims 3 and 4 utilizing reciprocating flow due to tidal force and wave force, and FIG. 9 is a sectional view taken along line ZZ of FIG. . The two turbines 1 are mounted symmetrically with respect to the center line of the floating body 3, and the rotor blades 5 of the upstream turbine 1 are below the water surface, leaving their tips slightly above the water surface, thus blocking the water flow. Receive to stop and rotate inward. As a result, a slight head drop is generated to flow to the downstream side, and the downstream side water turbine 1 is received by the lower rotary blade 5 and also rotates inward. In this embodiment, since the inclined plate 18 according to claim 4 is provided on both sides and the center of the floating body 3, the upstream inclined plate 18 is on the upper side of the upstream turbine 1 for the flow from right to left in the figure. The inclined plate 18 at the center of the rotor blade 5 acts on the lower rotor blade 5 of the downstream turbine 1, and the inclined plate 18 of the downstream floats. With respect to the flow in the opposite direction, these three inclined plates 18 move as shown by the phantom lines, and work by alternating the upstream side and the downstream side. However, since the inclined plate 18 has a large water flow resistance, it is better not to adopt the central or all inclined plates 18 when a strong mooring means cannot be obtained. In the buoyancy type power generator having such a structure, the upstream turbine 1 is first rotated by the upper rotor 5 with respect to the water flow in any direction, and then the downstream turbine 1 is rotated by the lower rotor 5. Since it is rotated by, it can be expected to effectively generate electricity if it is installed in a place with a strong tidal current or at a beach where the waves are active. Although the mooring means is the mooring line 13 in the present embodiment, the arm 11 and the mooring shown in FIG. It is better to use a crank type consisting of the shaft 12.

FIG. 10 shows the use of an existing weir 20.
FIG. 11 is a perspective view showing an embodiment of the buoyancy type power generator of FIG.
It is sectional drawing in the 0W-W line. Weir 20 shown in the figure
, The central part has a step and is lower than the left and right shoulder parts, and the water flows only here except when the water level increases.
The right and left shoulders are provided with a frame 19 that is in contact with the upstream side surface, the upper surface, and the downstream side surface of the weir 20, and are fixed. The both frames are connected by a sloping plate 18 on the downstream side and a lattice 17 on the upstream side. The inclined plate 18 has an optimum inclination from the upper surface of the central portion of the weir 20 to the upper surface of the inner cylinder 2, and its back surface is in contact with the side surface of the weir 20 via the reinforcing plate 18C. The grate 17 is inclined with respect to the upstream side surface of the weir 20 so that the debris can be moved to the left or right, and as shown in the figure, the grate is provided to a position lower than the upper surface of the weir 20. A small water tank is formed on the side. However, details of the means for preventing the inflow of large-sized drifted matter are not concerned with the details of the present invention. Therefore, the water flow first passes through the grid 17 from the upstream side to prevent the inflow of large floating debris and rocks, and is accelerated by the inclined plate 18 to collide with the rotor blades 5 to rotate the water turbine 1. Power is generated by the generator 4. At the time of increasing water, the water turbine 1 automatically rises due to buoyancy, large floating debris is moved to the left or right by the grid 17, and falls from the shoulder portion of the weir 20, so the device is not damaged. In such a buoyancy type power generator, the existing weir 20 is used as it is, so that the construction cost thereof is extremely low and the existing natural environment is not destroyed.

[0016]

Since the buoyancy type power generator according to the present invention is constructed as described above, it has the following effects.

In the buoyancy type power generator of claim 1, the entire turbine 1 is below the water surface, and the upper rotor blade 5 receives the water flow near the water surface with the most movement on its concave surface to open at a predetermined angle, and then to the lower side. Since it automatically closes as it moves, not only can the fluid resistance be kept low, but water flow energy can be efficiently absorbed by a turbine with a smaller diameter than the conventional open channel turbine. In addition, this device can avoid the accumulation of earth and sand except when the weir 20 according to claim 5 is provided.

The buoyancy type power generator according to claim 2 has the same advantages as the buoyancy type power generator according to claim 1 above, the rigidity of the entire device is increased, and the position of the water turbine 1 with respect to the water surface can be stably maintained. By supporting the intermediate position in the width direction with the floating body 3, it can be installed in a wide water flow, and can also be used for reciprocating flow due to tidal waves and wave forces. For the tidal current, the buoyancy type power generator of claim 1 can also be used, but the structure of claim 2 increases the strength of the entire device and is suitable for more severe environments.

The buoyancy type power generator of claim 3 utilizes a reciprocating flow due to tidal and wave forces, etc., and the upstream turbine 1 and the downstream turbine 1 are always facing each other regardless of the reciprocal alternation of the water stream. Since it rotates in the opposite direction under the surface of the water and the water flow is utilized twice, the water flow energy can be efficiently absorbed.
Since this device is equipped with two water turbines 1, the device cost is high, but higher efficiency and stability can be expected than the device of claim 2.

The buoyancy type power generator of claim 4 is the same as that of claim 1,
In the buoyancy power generators 2 and 3, the inclined plate 18 is provided on the upstream side.
Since the water flow that is intended to face the inner cylinder 2 is accumulated and accelerated, the water flow is collided with the upper rotary blade 5, and the efficiency of these devices is significantly increased.

When the weir 20 and the sand discharging gate 15 are positively provided because the flow of the river to be used is slow, the buoyancy type power generator of claim 5 uses these heads to create a sudden flow. Since the buoyancy type power generator of claim 1 or claim 2 is driven, the output can be greatly increased. Also,
Better conditions for installation using the existing weir 20 have the effects of significantly reducing the construction cost as compared to the case of new construction and hardly destroying the existing natural environment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a buoyancy type power generator according to claim 1 and claim 5;

FIG. 2 is a cross-sectional view taken along the line XX in FIG.

FIG. 3 is an exploded view showing details of a mounting portion of the rotor blade 5 to the inner cylinder 2;

FIG. 4 is a cross-sectional view showing an embodiment in which buoyancy is applied near the tip of the rotary blade 5,

FIG. 5 is a perspective view showing an embodiment of the buoyancy type power generator of claims 2 and 5;

FIG. 6 is a cross-sectional view taken along line YY of FIG.

FIG. 7 is a cross-sectional view showing an embodiment of the buoyancy type power generation device according to claim 2 and claim 4 which utilizes a reciprocating flow due to tides, etc.

FIG. 8 is a perspective view showing an embodiment of the buoyancy type power generator of claims 3 and 4;

9 is a cross-sectional view taken along line ZZ of FIG.

FIG. 10 is a perspective view showing an embodiment of the buoyancy type power generator of claim 5;

FIG. 11 is a cross-sectional view taken along the line WW of FIG.

[Explanation of symbols] 1 turbine 2 inner cylinder 2A side plate 2B rib 2C protrusion 3 floating body 3A connected body 4 generator 5 rotors 5A wing bearing 5B wings 5C wing cavity 5D leaf spring 6 rotation axes 7 Rotating shaft bearing 8 small axes 9 Turbine feet 10 arm axis 11 arms 12 mooring shaft 13 mooring lines 14 short arm 15 Exhaust gate 16 sand removal door 17 grid 18 inclined plate 18A inclined plate axis 18B stop axis 18C support plate 19 frames 20 weir

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 11

Claims (4)

[Claims] 1. A) centering on a horizontal rotation axis (6),
Further, a plurality of rotary blades (5) having a concave shape due to a curved surface or an inclined surface are arranged around the inner cylinder (2) forming a cavity in a direction perpendicular to the axis,
The lower part of the rotor blade (5) is opened via the small shaft (8) so that the rotor blade (5) opens to the outer peripheral surface of the inner cylinder (2) only on the side where the concave surface receives the water flow and closes on the opposite side. The water turbine (1) is used which is connected to (2) and which is provided with a means for preventing it from opening beyond a predetermined angle. (B) The rotary shaft (6) is set in the width direction of the water flow, and both ends thereof are supported by the rotary shaft bearings (7), and the lower rotary vane (5) receives the water flow on its concave surface to form a part of the water turbine (1). Buoyancy is applied to the inner cylinder (2) to connect the rotor to the rotating shaft (6) by connecting the generator (4) to the rotating shaft bearing (7) so that the rotor rotates in water. An anchoring means is provided on the bearing (7). A floating power generation device having the above-mentioned configuration, which generates electric power by utilizing a unidirectional flow such as a river flow or a tidal current. 2. (a) The same as claim 1. (B) The rotating shaft (6) is set in the width direction of the water flow, and both ends thereof are supported by the rotating shaft bearings (7), and the upper rotor blade (5) receives the water flow near the water surface in its concave surface, and the turbine (1) In order to rotate, buoyancy is applied to the inner cylinder (2) and the tips of the rotor blades (5) near the tips, and the rotor (7) is connected to the generator (4) to connect the rotor to the rotor shaft (6). And bearings on both ends of the rotary shaft (7)
Mooring means provided. A floating power generation device characterized by the above-mentioned configuration, which uses a unidirectional flow such as a river flow or a tidal current or a reciprocating flow due to a tidal flow. 3. (a) The same as claim 1. (B) A plurality of floating bodies (3) are provided in parallel in the width direction of the water flow, and they are connected by a connecting body (3A), and the upper or lower rotor blade (5) receives the water flow on its concave surface and is a water turbine. The water turbine (1) is supported by a floating body (3) through a rotating shaft bearing (7) so that the (1) rotates, and a generator (4) is provided inside the floating body (3) to rotate its rotor. The floating body (3) is provided with mooring means connected to the shaft (6). A floating power generation device characterized by the above-mentioned configuration, which uses a unidirectional flow such as a river flow or a tidal current or a reciprocating flow due to a tidal flow. 4. (a) The same as claim 1. (B) A plurality of floating bodies (3) are provided in parallel in the width direction of the water flow, and they are connected by a connecting body (3A) to form a floating body (3).
The upper rotor (5) is connected to the water turbine (1) so that it rotates in the water near the water surface by receiving the water flow on its concave surface on either side before and after the water flow direction, and on the opposite side to the lower rotor blade. The two water wheels (1) are supported by the floating body (3) via the rotating shaft bearing (7) so that the water surface (5) rotates by receiving the water flow on its concave surface, and the generator ( 4) is provided and connected to the rotating shaft (6), and the floating body (3) is provided with mooring means. A floating power generation device that is characterized by the above-mentioned configuration and that uses a reciprocating flow due to tidal waves to generate power.