JP2005307894A - Wave power generation device, and wave power generation type buoy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly efficient power generation to achieve high start torque and rotation torque in a wave power generation device and a wave power generation type buoy. <P>SOLUTION: This device is provided with an air chamber 2 having wave introducing ports 2a and 2b at a lower part, a turbine chamber 6 connected to the air chamber 2 through an inner air supply/discharge passage 4, and connected to an above-water space through an outer supply/discharge air passage 5, a turbine 7 disposed in the turbine chamber 6 to be rotated by air currents in accordance with vertical move of the water level in the air chamber 2, and a power generator 8 of which rotor is connected to the turbine 7. The turbine 7 is a cross flow type windmill. The inner supply/discharge air passage and the outer supply/discharge air passage 5 have turbine a supply/discharge air port 4b/5b on the opposite side to each other around the rotation axis of the turbine 7, so that air from the turbine supply/discharge ports 4b and 5b flows along a tangent line to the outer circumference toward the outer circumference of the turbine 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wave power generation device that generates power using wave energy and a wave power generation type buoy using the same.

In recent years, as a clean energy gentle to the natural environment, a wave power generation apparatus using wave energy that naturally occurs near the surface of water such as the ocean has attracted attention. Large wave power generators are operated by manned monitoring in principle, but small ones are being considered for use as power sources for small buoys and facilities that require unmanned operation over a long period of time. Such a small wave power generator can be used for, for example, an ocean buoy, a marine work table, a floating artificial island, a floating platform, etc., especially for various observations and buoyancy lamps in the ocean, rivers and lakes. It is assumed to be used for buoys that are used.
Conventionally, as a wave power generation device, for example, as described in Patent Document 1 and Patent Document 2, a turbine of a generator is driven to rotate by utilizing a change in volume accompanying a change in the water level in the air chamber. What to do is known.

The wave power generation device described in Patent Document 1 has a structure in which a turbine having propeller-shaped blades is mounted on a cylindrical tube, and air in the cylindrical tube hits the entire lower surface of the turbine to rotate the turbine.
The wave power generation device described in Patent Document 2 has a structure in which a cylindrical turbine having blades extending in parallel with a rotation axis is mounted on a box without a bottom. In this wave power generation device, for example, when the air in the box is pushed out due to a rise in the water level, the air flows into the turbine from the two inner air supply / exhaust ports that open over almost the entire circumferential surface of the turbine. The turbine is rotated and passes through the turbine, and is discharged to the outside through two outer air supply / exhaust ports that open over substantially the entire half circumferential surface of the turbine.

JP-A-11-201014 (FIG. 1) Japanese Utility Model Publication No. 60-6887 (Fig. 1)

However, the following problems remain in the conventional technology. That is, in the wave power generation device described in Patent Document 1, propeller-like blades are used for the turbine that rotates the rotating shaft of the generator, which is suitable for high-speed airflow. There is a disadvantage that sufficient starting torque and rotational torque cannot be obtained with a weak air flow from the air chamber when the rotational torque is small and the wave is small.
Further, in the wave power generation device described in Patent Document 2, since a cylindrical turbine having blades extending in parallel with the rotation shaft is employed, relatively large starting torque and rotation torque are generated. Since the air flow from the chamber uniformly hits the entire half-circumferential surface of the turbine, there is an inconvenience that the action against the direction of rotation also occurs, the rotational speed does not increase, and the efficiency is low. In addition, if an air flow is introduced into the turbine from the two air supply / exhaust ports, the air flow rate is reduced by half, and the air flow interferes with the center of the turbine and the like, resulting in turbulence and the like. There was an inconvenience of lowering.

  The present invention has been made in view of the above-mentioned problems, and provides a wave power generation device capable of obtaining high starting torque and rotation torque and capable of generating power with high efficiency, and a wave power generation buoy including the same. Objective.

  The present invention employs the following configuration in order to solve the above problems. That is, the wave power generation device of the present invention is connected to the air chamber having a wave inlet opening in the lower portion thereof under the water, the air chamber via the inner air supply / exhaust passage, and the water surface space via the outer air supply / exhaust passage. A turbine chamber to be connected; a turbine that is arranged in the turbine chamber and that is rotated by the flow of air as the water level in the air chamber rises and lowers; and a generator that has a rotor connected to the turbine. A plurality of blades extending in parallel are annularly arranged in the circumferential direction and have a cylindrical shape through which air can flow across the axial center, and the inner supply / exhaust passage and the outer supply / exhaust passage are mutually connected to the turbine chamber. It has one turbine supply / exhaust port on the opposite side with the rotation axis as the center, and the air from the turbine supply / exhaust port is arranged to flow along the tangential direction of the outer periphery toward the outer periphery of the turbine. Features.

  In this wave power generation device, a turbine has a so-called cross-flow wind turbine having a cylindrical shape in which a plurality of blades extending in parallel to the rotation axis direction are annularly arranged in the circumferential direction and air can flow across the center of the shaft. Since the air from one turbine supply / exhaust port is arranged to flow along the tangential direction of the outer periphery toward the outer periphery of the turbine, The air flow does not act in the direction opposite to the direction, and high starting torque and rotational torque are obtained, and the turbine can be rotated with high efficiency. Further, a plurality of pairs of turbine supply / exhaust ports are provided by setting a pair of turbine supply / exhaust ports facing each other with the turbine interposed therebetween and setting the direction of air flow from the turbine supply / exhaust ports in a direction along the rotation direction of the turbine. The generation of turbulent flow due to the merging of air and interference interference between air are eliminated, and the rotational efficiency of the turbine can be increased.

  The wave power generation device of the present invention preferably includes a plurality of turbine chambers and turbines. In other words, in this wave power generation device, by providing a plurality of turbine chambers and turbines, the capacity of the return air in each turbine chamber is smaller than in the case of the same volume ratio in one turbine chamber and turbine, and even if the wave height is small, Is generated, the turbine can be rotated, and the operation efficiency can be improved.

  The wave power generation device of the present invention has an air chamber air supply / exhaust port in which an inner air supply / exhaust passage opens at a part of an upper portion of an air chamber, and guides air toward the air chamber air supply / exhaust port. A guide portion is preferably provided. That is, in this wave power generation device, when the air in the air chamber is pushed out by the rising of the wave, the air flow is guided to the air chamber supply / exhaust port by the guide portion, and a contracted flow (needle valve effect) occurs. It becomes an acceleration flow, and the rotational efficiency of the turbine can be further improved.

  In the wave power generation device of the present invention, it is preferable that a rectifying plate is provided in at least one of the inner supply / exhaust passage and the outer supply / exhaust passage. That is, in this wave power generation device, a rectifying plate is provided in at least one of the inner air supply / exhaust passage and the outer air supply / exhaust passage, whereby an air flow rectifying effect is obtained and air to the turbine part suitable for rotation is obtained. Radiation is reliably performed, and the rotational effect of the turbine can be further enhanced.

  In the wave power generation device of the present invention, it is preferable that generators are individually connected to both ends of the turbine. That is, in this wave power generation device, since the generators are connected to both ends of the turbine, one turbine is provided with two generators. For example, one generator is inadvertent such as a failure. Even if a situation arises, there is an advantage that can be handled by the other generator.

  The wave power generation device of the present invention has an outer air supply / exhaust port in which the outer air supply / exhaust passage opens into the water surface space, and the outer air supply / exhaust port is provided with a rainwater wave shield that covers the upper side. It is characterized by that. That is, in this wave power generation device, the outer air supply / exhaust port is covered with the rainwater wave shield, so that rain, splashes, etc. enter the outer air supply / exhaust passage from the outer air supply / exhaust port, It is possible to prevent entry into the turbine chamber.

  The wave power generation device of the present invention is characterized in that a turbine chamber, a turbine, and a generator are disposed in a drive unit chamber that is detachably provided on an air chamber. That is, in this wave power generation device, since the drive unit of the turbine chamber, turbine, and generator is arranged in the drive unit chamber, it is possible to prevent electrical leakage and the like by isolating electrical related equipment such as the generator from seawater, etc. Rust prevention of each member such as a bearing becomes possible, and stable operation of the apparatus can be maintained for a long time. Moreover, since the drive unit chamber is separable from the air chamber, only the drive unit chamber can be separated and transported, and operations such as maintenance and drive unit replacement are facilitated.

  The wave power generation type buoy of the present invention includes the wave power generation device of the present invention. That is, this wave power generation type buoy is equipped with the wave power generation device of the present invention, so that it can be activated even in a small wave situation, can stably supply power over a long period of time, and requires long-term unmanned operation. It is suitable for buoys for marine observation.

The present invention has the following effects.
That is, according to the wave power generation device and the wave power generation type buoy according to the present invention, the turbine is a so-called cross-flow wind turbine type, and the air from the turbine supply / exhaust port is directed to the outer periphery of the turbine toward the outer periphery of the turbine. Therefore, it is possible to efficiently convert the air flow from the air chamber accompanying the wave ascending and descending into the rotational force of the turbine, and to obtain high power generation efficiency. Therefore, even in a calm situation of a small wave, high starting torque and rotational torque can be obtained, which can easily generate electricity and enable long-term unmanned operation. In addition, the simple and high power generation efficiency can achieve a significant reduction in manufacturing cost and running cost as compared with existing wave power generation facilities.

  Hereinafter, a first embodiment of a wave power generation device and a wave power generation type buoy according to the present invention will be described with reference to FIGS. 1 to 5.

  The wave power generation device 1 of this embodiment is attached to, for example, a marine observation buoy. As shown in FIGS. 1 and 2, a box shape having wave introduction ports 2 a and 2 b opened in seawater at the bottom. The air chamber 2, the waterproof drive unit chamber 3 provided in the air chamber 2 so as to be separable, and the drive unit chamber 3 disposed in the drive unit chamber 3 and connected to the air chamber 2 via the inner air supply / exhaust passage 4 and on the water surface A pair of turbine chambers 6 connected to the space via the outer air supply / exhaust passage 5, a pair of turbines 7 that are arranged in the turbine chamber 6 and that are rotated by the flow of air accompanying the elevation of the water level in the air chamber 2, and driving It consists of four brushless electromagnetic induction type generators 8 installed in the chamber 3 and having rotors 8a connected to both ends of each turbine 7, and four electric double layer capacitors electrically connected to the generator 8. A storage battery 9 is provided.

  As shown in FIGS. 2 and 3, the turbine 7 has a cylindrical shape in which a plurality of blades 7a extending in parallel to the rotation axis direction are annularly arranged in the circumferential direction and air can flow through the central portion of the shaft. It is a so-called crossflow type windmill. Further, the plurality of blades 7 a are arranged at a predetermined interval on the outer peripheral side with a central portion of the turbine 7, and have a shape along a spiral wound around the rotation center of the turbine 7 and the rotation of the turbine 7. It has an arcuate vertical cross-sectional shape that is convex forward in the direction.

As shown in FIGS. 1 and 4, the air chamber 2 has a downward wave inlet 2a that opens downward and a side wave inlet 2b that opens laterally. A net member 2c is stretched to prevent the suspended matter or the like from entering the inside.
Each inner air supply / exhaust passage 4 has an air chamber supply / exhaust port 4a opened adjacent to each other in the upper center of the air chamber 2, and air is supplied to the air chamber 2 toward both the air chamber supply / exhaust ports 4a. A guide portion 2d for guiding is provided.
The guide portion 2d has a surface inclined in a circular arc shape in the longitudinal section so as to gradually narrow the horizontal cross-sectional area in the air chamber 2 from the inner peripheral surface to the air chamber air supply / exhaust port 4a on the upper surface on the inner surface of the air chamber 2. ing.

The pair of turbine chambers 6 are divided into adjacent states via a central partition plate 10, and the inner supply / exhaust passage 4 and the air chamber supply / exhaust port 4 a are also separated between the turbine chambers 6 by the partition plate 10. Yes. A turbine 7 is horizontally disposed in the adjacent turbine chambers 6 so that the rotation axes thereof are parallel to each other.
The inner air supply / exhaust passage 4 and the outer air supply / exhaust passage 5 have one turbine air supply / exhaust port 4b, 5b on the opposite side with respect to the rotation axis of the turbine 7 in the turbine chamber 6, respectively. The air from 4b and 5b is arranged so as to flow toward the outer periphery of the turbine 7 along the tangential direction of the outer periphery.

  Since each turbine chamber 6 accommodates a cylindrical turbine 7, most of the shape is a cylindrical shape slightly larger than the diameter of the turbine 7. Thereby, an aerodynamic proximity effect is generated between the inner surface of the turbine chamber 6 and the outer peripheral surface (blade (blade 7a) surface) of the turbine 7, and the turbine rotational force is amplified. In this way, a smooth air flow occurs in the vicinity of the outer peripheral surface of the turbine 7 along the cylindrical shape of the turbine chamber 6, so that the energy efficiency is increased and the rotation of the turbine 7 can be increased.

The outer air supply / exhaust passage 5 extends upward from the turbine air supply / exhaust port 5b, is disposed to be folded downward and outward at the top of the drive unit chamber 3, and further includes an outer air supply / exhaust port 5a that opens to the space above the water surface. ing. The outer air supply / exhaust port 5a is provided with a rainwater wave shield 11 that covers the upper side. By providing the rainwater wave guard portion 11, it is possible to prevent rain, splashes, and the like from entering the outer air supply / exhaust passage 5 from the outer air supply / exhaust port 5 a and entering the turbine chamber 6.
The inner air supply / exhaust passage 4 and the outer air supply / exhaust passage 5 are provided with rectifying plates 12 and 13 for adjusting the air flow in a certain direction. These rectifying plates 12 and 13 may be arranged other than in the middle of the inner air supply / exhaust passage 4 and the outer air supply / exhaust passage 5, or may be arranged directly in the air chamber air supply / exhaust port 4a and the outer air supply / exhaust port 5a. . Moreover, the shape, position, number of sheets, etc. which were proved by the wind tunnel experiment etc. are applied to these baffle plates 12 and 13.

All the air flow paths from the air chamber 2 through the inner air supply / exhaust passage 4 and the turbine chamber 6 to the outer air supply / exhaust port 5a of the outer air supply / exhaust passage 5 have as few protrusions as possible, and are chamfered and rounded. And it is made into streamline shape by bending sheet metal processing. Thereby, the generation of turbulent flow in the air flow path is prevented, a smooth air flow is created, and the turbine 7 is stably rotated.
Further, it is preferable that the inner supply / exhaust passage 4 and the outer supply / exhaust passage 5 are set to have the same length in consideration of the balance of the air reciprocating operation. In this embodiment, the outer air supply / exhaust passage 5 is slightly longer than the inner air supply / exhaust passage 4, but by setting the thicknesses of the upper flange portion 14 and the lower flange portion 15 described later to be thicker than other portions, The path 4 is lengthened to approach the length of the outer air supply / exhaust path 5.

The drive unit chamber 3 has an electrical related chamber 16 having a waterproof structure and isolated on the turbine chamber 6, and in the electrical related chamber 16, each generator 8, each storage battery 9, and an electric control circuit ( Etc.) are installed. Note that the upper portion of the drive unit chamber 3 is sealed with a lid plate 17 that can be opened and closed, and the lid plate 17 can be opened and operated when performing maintenance or component replacement. The storage batteries 9 are electrically connected to each other so as to avoid complete discharge.
At each end of each turbine 7, there are provided a rotating shaft member 7b fixed to the rotation center and rotatably passing through the side wall of the turbine chamber 6, and a turbine side pulley 7c fixed to a portion through which the rotating shaft member 7b passes. It has been. The distal end of the rotating shaft member 7b is rotatably supported by a bearing portion 18 provided on the inner surface of the drive unit chamber 3.

  On the other hand, the generator 8 has a rotor 8a penetrating through a side wall of the electric-related chamber 16, and a generator-side pulley 8b is fixed to the tip of the rotor 8a. An endless belt 19 is wound and connected to the generator-side pulley 8b and the corresponding turbine-side pulley 7c of the turbine 7. The generator-side pulley 8b has a predetermined diameter smaller than that of the turbine-side pulley 7c, and changes the rotational speed of the generator 8 to a rotational speed higher than the rotational speed of the turbine 7.

An upper flange portion 14 is provided at the upper portion of the air chamber 2, and a lower flange portion 15 is provided at the lower portion of the drive portion chamber 3. The upper flange portion 14 and the lower flange portion 15 are fixed to each other by a bolt 20 and a nut 21 that are inserted into a plurality of through holes (not shown) provided in the upper flange portion 14 and the lower flange portion 15, respectively.
Each of the above-described mechanism members is configured with a salt-resistant material specification, and the bearing portion 18 and the like are also subjected to rust prevention measures. In addition, electrical control circuits and electrical wiring are also installed with complete waterproofing measures.

  Next, a power generation method by the wave power generation device 1 of the present embodiment will be described below with reference to FIG.

  First, the wave power generation device 1 according to the present embodiment is installed at a predetermined place or a buoy so that the side wave introduction port 2b is always placed below the sea surface as much as possible in consideration of the wave height.

In this state, when the water level in the air chamber 2 rises due to the wave, as shown in FIG. 1A, the turbine 7 is rotated by the following air flow to generate power.
Pressurized by the rising water in the air chamber 2, the air in the air chamber 2 enters the air chamber supply / exhaust port 4a while being guided by the guide portion 2d. In the air chamber supply / exhaust port 4a, the air is compressed and accelerated by the needle valve effect, and is radiated from below to the outer periphery of the turbine 7 from the turbine supply / exhaust port 4b via the inner supply / exhaust passage 4 (arrows in the figure). Y1). At this time, the inner air supply / exhaust passage 4 and the turbine air supply / exhaust port 4 b are set so that the air flow flows along the tangential direction of the outer periphery toward the outer periphery of the turbine 7. Without impeding, the blade 7a of the turbine 7 is pushed in the rotational direction and penetrates through the central portion of the turbine 7 from the gap between the blades 7a (see arrow Y2 in the figure).

Next, the air flow that has circulated in the turbine 7 is discharged from the gap between the opposite (upper) blades 7a toward the turbine supply / exhaust port 5b of the outer supply / exhaust passage 5 (see arrow Y3 in the figure). . When passing through the gap between the blades 7a, the blades 7a are simultaneously pushed in the rotational direction, and the rotational force is also applied to the turbine 7 here. Thereby, the turbine 7 rotates in the direction of arrow Y4 in the drawing. The rotation of the turbine 7 is transmitted to each generator 8 via the endless belt 19, and power is generated by the generator 8, and the obtained electric power is charged to each storage battery 9.
Finally, air flows through the outer air supply / exhaust passage 5 and is discharged to the water surface space through the outer air supply / exhaust port 5a (see arrow Y5 in the figure).

Next, when the water level in the air chamber 2 is lowered by the wave, as shown in FIG. 1B, the turbine 7 is rotated by the following air flow to generate power.
The inside of the air chamber 2 is depressurized by the water level descending in the air chamber 2, and air is sucked from the air chamber supply / exhaust port 4a (see arrow Y6 in the figure). For this reason, air is sucked from the space above the water surface via the outer air supply / exhaust passage 5 (see arrow Y7 in the figure), and is radiated from above to the outer periphery of the turbine 7 from the turbine supply / exhaust port 5b (arrow Y8 in the figure). reference). At this time, since the outer air supply / exhaust passage 5 and the turbine air supply / exhaust port 5b are set so that the air flow flows along the tangential direction of the outer periphery toward the outer periphery of the turbine 7, the air flow rotates the turbine 7. Without impeding, the blade 7a of the turbine 7 is pushed in the rotational direction and penetrates through the central portion of the turbine 7 from the gap between the blades 7a (see arrow Y9 in the figure).

Next, the airflow that has circulated in the turbine 7 is discharged toward the turbine air supply / exhaust port 4b of the inner air supply / exhaust passage 4 from the gap between the opposite (lower) blades 7a. When passing through the gap between the blades 7a, the blades 7a are simultaneously pushed in the rotational direction, and the rotational force is also applied to the turbine 7 here. As a result, the turbine 7 rotates in the same direction (arrow Y4 in the figure) as when the water level rose. The rotation of the turbine 7 is transmitted to each generator 8 through the endless belt 19 in the same manner as when the water level rises, and power is generated by the generator 8 and the obtained power is charged to each storage battery 9. Is done.
Finally, air flows through the inner air supply / exhaust passage 4 and is sucked into the air chamber 2 through the air chamber supply / exhaust port 4a (see arrow Y6 in the figure).

  By repeatedly raising and lowering the water level in the air chamber 2 as described above, the air flow flows through the turbine chamber 6 while changing the direction up and down, and the turbine 7 is rotated in the same direction in either flow. In many conventional wave power generators, a fluid or mechanical valve is provided, and the turbine is forced to stop intermittently due to the difference in wave height. However, in the wave power generator 1 of the present embodiment, the wave height difference. The reciprocating flow of the turbine chamber 6 caused by the above is caused by the rotation of the turbine 7 in an unreasonable manner, and can continue to rotate in a predetermined direction without providing a valve. Is dramatically improved.

  As described above, in the present embodiment, the turbine 7 is a cross-flow wind turbine type, and air further flows from the turbine supply / exhaust ports 4b and 5b one by one sandwiching the turbine 7 toward the outer periphery of the turbine 7 so as to be tangential to the outer periphery. Therefore, the air flow does not act in the direction opposite to the rotation direction, and high starting torque and rotation torque can be obtained, and the turbine 7 can be rotated with high efficiency. In addition, by setting a pair of turbine supply / exhaust ports 4b and 5b facing each other with the turbine 7 interposed therebetween, and setting the air flow direction from the turbine supply / exhaust ports 4b and 5b to a direction along the rotation direction of the turbine 7 Moreover, the occurrence of turbulent flow due to the merging of air in the case of having a plurality of pairs of turbine air supply / exhaust ports, interference interference between the air, and the like are eliminated, and the rotational efficiency of the turbine 7 can be increased.

  Thereby, even when the wave height is comparatively gentle, for example, 0.3 m or less, the start-up can be started well. In addition, since it operates with a simple mechanism without valve, it can operate stably at low cost over a long period of time, and it is easy to downsize and lay on a small ship with a small crane. Is possible. Therefore, the wave power generation device 1 of the present embodiment is suitable as a power source for a small buoy or the like that requires long-term unmanned operation.

Also, by providing a pair of turbine chamber 6 and turbine 7, the difference in volume ratio between “turbine chamber” and “air chamber” is increased compared to the case where one turbine chamber and turbine have the same volume ratio. The recirculation air capacity of the turbine chamber 6 is reduced, and a contracted flow is generated even at a small wave height, so that the turbine 7 can be rotated, and the operation efficiency can be improved.
Further, since the rectifying plates 12 and 13 are provided in the inner air supply / exhaust passage 4 and the outer air supply / exhaust passage 5, an air flow rectifying effect can be obtained and air radiation to a turbine portion suitable for rotation can be reliably performed. Thus, the rotation effect of the turbine 7 can be further enhanced.

  Further, since the generator 8 is connected to both ends of the turbine 7, the two generators 8 are provided for one turbine 7, and one of the generators 8 has an unexpected situation such as a failure. However, there is an advantage that can be handled by the other generator 8. In particular, in this embodiment, since the four turbines 8 are provided with the two turbines 7, it is suitable for longer-term use.

  In addition, since the drive units such as the turbine chamber 6, the turbine 7, and the generator 8 are arranged in the drive unit chamber 3, the electrical equipment such as the generator 8 can be isolated from seawater and the like to prevent leakage and the like. It becomes possible to waterproof and rust prevent each member such as the device, and the stable operation of the apparatus can be maintained for a long time. Furthermore, since the drive unit chamber 3 is separable from the air chamber 2, only the drive unit chamber 3 can be separated and transported, and operations such as maintenance and replacement of the drive unit chamber 3 are facilitated.

In the above-described embodiment, the air inflow amount to the left and right turbines 7 by the partition plate is ½ of the air inflow / feed amount. However, the volume ratio of the “turbine chamber” to the “air chamber” is increased. Due to the synergistic effect such as the effect and the contraction effect by the air chamber supply / exhaust port 4a having a narrow opening area, the decrease in the rotation efficiency due to the decrease in the flow rate is eliminated.
The turbine 7 employed in the present embodiment is a crossflow type windmill, but such a crossflow type windmill (crossflow fan) or a vertical axis type windmill represented by a sirocco fan has a low peripheral speed ratio. High rotational torque and non-directional wind direction change. Due to these characteristics, the vertical axis type wind turbine has many problems over the conventional propeller type as a means to convert a powerful reciprocating flow that is not high wind speed in the device caused by wave energy, but to a rotational energy. It not only solves, but also contributes to the improvement of power generation efficiency. Further, the turbine 7 of this vertical axis type windmill is firmly fixed to the bearing portion 18 at both ends in the vertical direction, and can be stably rotated with little vibration due to turbulent flow and has robustness.

  The turbine 7 of the vertical axis type windmill has a low peripheral speed ratio of 1/3 to 1/4 compared to the propeller type windmill, so that the load exerted on the bearing unit 18 and incidental rotary conductive equipment is small, and the component life is shortened. Can be prolonged. Furthermore, the solidity ratio (blade (blade 7a) area ratio occupying the wind receiving area) is high, and the operation is continued without installing an expensive decelerator due to the phenomenon that the rotational acceleration becomes dull when the air flow becomes a certain level or more. be able to. Note that the vertical axis type windmill is extremely quiet compared to the propeller type windmill, and the installation location is not limited in this respect.

  Next, a wave power generation type buoy including the wave power generation device 1 of the present embodiment will be described with reference to FIG.

The wave power generation type buoy of this embodiment is a buoy for ocean observation. As shown in FIG. 5, a total of four wave power generation devices 1 are attached to the outer surface of the buoy main body 30 by fixing members 31 respectively. It is a thing. Each wave power generator 1 is attached with the side wave inlet 2b facing outward. Further, the storage battery 9 of each wave power generation device 1 is connected to each observation device (not shown) provided in the buoy body 30 to supply power.
Thus, since the wave power generation type buoy of this embodiment is equipped with the wave power generation device 1, it can be activated even in a small wave situation and can stably supply power to the observation equipment over a long period of time. Suitable for long-term unattended operation.

  Next, 2nd and 3rd embodiment of the wave power generation type buoy provided with the said wave power generator 1 is described with reference to FIG.6 and FIG.7. In the following description, the same constituent elements described in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The difference between the second embodiment and the first embodiment is that the wave power generation type buoy of the first embodiment externally attaches the wave power generation device 1 to the outer peripheral surface, whereas the wave of the second embodiment is different. As shown in FIG. 6, the power generation buoy is a built-in type in which four wave power generation devices 1 are housed. That is, in the second embodiment, the wave power generators 1 are installed on the floor 41 provided inside the buoy main body 40 in four directions along the inner peripheral surface of the buoy main body 40, respectively. In these wave power generators 1, the lower wave introduction port 2 a is closed, and the side wave introduction port 2 b is connected to a side surface opening 40 a provided on the side wall of the buoy main body 40 via an introduction pipe portion 40 b. Yes. Accordingly, seawater or the like is introduced into the air chamber 2 from the side wave inlet 2b via the side opening 40a.

  As described above, the wave power generation type buoy of the present embodiment has the wave power generation device 1 built in the buoy main body 40, so that the degree of freedom in designing the appearance of the buoy is increased and the wave power generation device 1 Since the drive part chamber 3 is not directly exposed to splashes of seawater or the like, it is suitable for longer-term use. In addition, it is possible to prevent damage caused by drifting object collision.

The difference between the third embodiment and the second embodiment is that the wave power generation type buoy of the second embodiment incorporates four wave power generation devices 1 whereas the wave power generation of the third embodiment. The type buoy is a single-machine type in which one wave power generation device 1 is provided in the buoy main body 50 as shown in FIG. That is, in the third embodiment, one wave power generation device 1 is housed in the buoy main body 50, and the circular side wave inlets 2b are provided in the four sides of the air chamber 2, respectively. The direction wave introduction ports 2b are connected to side opening portions 50a provided on four sides of the side wall of the buoy main body 50 via introduction pipe portions 50b. Thus, in the present embodiment, a small buoy having a simple configuration in which one wave power generation device 1 is incorporated can be obtained.
In both the second and third embodiments, the lower wave introduction port 2a of the wave power generator 1 is closed, but a communication hole such as seawater is provided at the bottom of the buoy and communicates with the lower wave introduction port 2a through an introduction pipe or the like. By doing so, seawater or the like may be introduced into the air chamber 2 from the bottom. In this case, the entrance and exit of seawater and the like to the air chamber 2 by waves can be obtained more efficiently.

  The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the wave power generation device 1 is mounted on a marine observation buoy, but in addition to this, a buoy buoy, a marine workbench, a breakwater, a floating artificial island, a floating platform, etc. It may be applied to facilities and places such as.
In the above embodiment, two turbine chambers 6 and 7 are mounted on one air chamber 2, but three or more turbine chambers 6 and turbines 7 are provided on one air chamber 2. It doesn't matter. Note that the two turbine chambers 6 and the turbine 7 are particularly preferable in consideration of the increase in the number of parts, the manufacturing cost, the power generation efficiency obtained, and the like.

  Further, a failure monitoring system or a remote control system may be mounted on the wave power generation device 1 or a buoy equipped with the wave power generation device 1. In other words, when the wave power generator 1 and the devices in the buoy break down, a system for automatically reporting by radio etc. is provided, and further, the operation of each device of the wave power generator 1 and buoy is performed by remote control such as radio. A management system may be constructed so as to control the state (operation start / stop, etc.) or to automatically return the state. Thereby, simplification of the management operation of the wave power generation device 1 and the buoy can be achieved.

It is sectional drawing at the time of the water level rise and water level fall which shows the wave power generator of 1st Embodiment which concerns on this invention. In the wave power generator of a 1st embodiment, it is a longitudinal section of the turbine extension direction which shows a drive part room. In the wave power generator of a 1st embodiment, it is a sectional view of the direction which intersects perpendicularly with the turbine extension direction which shows a drive part room. It is a front view which shows the wave power generator of 1st Embodiment. It is a front view which shows the wave power generation type buoy of 1st Embodiment which concerns on this invention. It is a front view which shows the wave power generation type buoy of 2nd Embodiment which concerns on this invention. It is a front view which shows the wave power generation type buoy of 3rd Embodiment which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Wave power generator, 2 ... Air chamber, 2a ... Downward wave introduction port, 2b ... Side wave introduction port, 2d ... Guide part, 3 ... Drive part chamber, 4 ... Inner air supply / exhaust path, 4a ... Air chamber air supply / exhaust port 4b, 5b ... turbine air supply / exhaust port, 5 ... outer air supply / exhaust passage, 5a ... outer air supply / exhaust port, 6 ... turbine chamber, 7 ... turbine, 7a ... blade, 8 ... generator, 8a ... rotor, 11 ... rain water Wave guard, 12, 13 ... Rectifying plate

Claims (8)

An air chamber having a wave inlet opening in the bottom at the bottom;
A turbine chamber connected to the air chamber via an inner air supply / exhaust passage and connected to a water surface space via an outer air supply / exhaust passage;
A turbine that is arranged in the turbine chamber and rotates by circulation of air accompanying the elevation of the water level in the air chamber;
A generator having a rotor connected to the turbine,
The turbine has a cylindrical shape in which a plurality of blades extending in parallel to the rotation axis direction are annularly arranged in the circumferential direction and air can flow across the shaft center portion,
The inner supply / exhaust passage and the outer supply / exhaust passage have one turbine supply / exhaust port in the turbine chamber opposite to each other centering on the rotation axis of the turbine, and the air from the turbine supply / exhaust port is A wave power generation device arranged to flow along a tangential direction of an outer periphery of the turbine toward the outer periphery of the turbine.   The wave power generation device according to claim 1, wherein a plurality of the turbine chambers and the turbines are provided. The inner air supply / exhaust passage has an air chamber air supply / exhaust port opened in a part of an upper portion of the air chamber,
The wave power generation device according to claim 1, wherein the air chamber is provided with a guide portion that guides air toward the air chamber supply / exhaust port.   The wave power generation device according to any one of claims 1 to 3, wherein a rectifying plate is provided in at least one of the inner supply / exhaust path and the outer supply / exhaust path.   The wave power generator according to any one of claims 1 to 4, wherein the generator is individually connected to both ends of the turbine. The outer air supply / exhaust passage has an outer air supply / exhaust port that opens to the space above the water surface,
The wave power generation device according to any one of claims 1 to 5, wherein the outer air supply / exhaust port is provided with a rainwater wave shield covering the upper side.   The said turbine chamber, the said turbine, and the said generator are arrange | positioned in the drive part chamber provided in the said air chamber so that isolation | separation was possible, The wave as described in any one of Claim 1 to 6 characterized by the above-mentioned. Power generator.   A wave power generation type buoy comprising the wave power generation device according to any one of claims 1 to 7.

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