JP2003097408A - Energy conversion device utilizing oscillation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical and efficient energy conversion device capable of being installed on a water surface and having high durability. SOLUTION: This energy conversion device has a water surface oscillation body provided so as to oscillate, a water stream receiver provided in water below the water surface oscillation body and rotatable around a rotary shaft, a wind receiver provided above the water surface oscillation body and rotatable around the rotary shaft, and a rotary drive mechanism rotating and driving the water stream receiver and a wind receiver. Cyclic oscillation is generated in the water surface oscillation body by rotating the water stream receiver and the wind receiver by a predetermined cycle to extract and convert energy from the oscillation of the water surface oscillation body. Each rotational cycle of the water stream receiver and the wind receiver is set about twice the inherent cycle of the water surface oscillation body.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to water flow energy,
Alternatively, it relates to an energy conversion device that converts wind energy into an easily usable energy form such as electricity, and in particular,
The present invention relates to an energy conversion device using oscillation.

[0002]

BACKGROUND OF THE INVENTION Wind energy, or water flow (eg,
(Tide current) energy is one of the few energy sources that can be supplied without exhaustion in Japan without the pollution associated with the current power generation method. It is inevitable that energy resources will be depleted by establishing technology for utilizing these natural energy sources. Extremely important for the future. Therefore, many researches and developments have been conventionally performed in relation to these natural energy conversion devices.

As a wind energy converter, a so-called wind power generator using a wind turbine has been widely put into practical use. However, there is a problem that a vast site is required due to a large amount of noise. Kai 2000-199472, JP-A
No. 09-317626 and Japanese Patent Laid-Open No. 08-028430) have been proposed, but they have not been sufficiently solved. In addition, when installing offshore, a large-scale support structure is required, and there is a problem that the cost is significantly increased.
That is, a wind energy conversion device using a conventional wind turbine is not suitable for power generation on a vast water surface, which is a desirable installation place with no obstacles and well ventilated due to problems such as noise, and is installed in a place where it can be installed. It has a big limitation.

In connection with a wind energy conversion device installed on water, a floating body is rotatably moored around mooring means connected to a structure at the bottom of the water, and the wind receiving angle can be changed by the floating body. A technique (patent No. 2698894) has been proposed in which wind-receiving blades are provided, and the wind force and the wave force are extracted by the rotational force of the water surface levitation body by the wind force and the vertical movement of the water surface levitation body by the waves to generate electricity. There is a problem that the wind energy cannot be efficiently extracted due to the resistance of water generated when the floating body floats, and a large-scale mooring means for mooring the floating body is required, which makes it difficult to install it offshore. Further, the wave energy has a drawback that only the vertical motion of the wave energy can be extracted and the water flow energy in the lateral direction cannot be extracted.

In a water flow energy conversion device, for example, a tidal current power generation device (Japanese Patent Laid-Open No. 11-351119, Japanese Patent Laid-Open No. 10-115278, etc.), a water turbine, which is a primary conversion device for extracting power, is exposed to the sea. Since it is arranged in a state and directly touches a complicated flow, there are problems that the life is shortened due to corrosion and the cost of maintenance is increased. In addition, the peripheral speed of rotation of the water turbine is quite high, and problems such as collision and damage with floating objects are expected.

Next, a wave energy conversion device will be described as a conventional technique related to an energy conversion device utilizing oscillation. As its name implies, a wave energy conversion device extracts and acquires energy based on short-term wave fluctuations, and extracts and acquires wind energy or water flow energy that has a flow in a substantially constant direction. The field of application that can be suitably implemented is not the same as that of the present invention whose main purpose is, but its power extraction means and the like can be used in the present invention, and will be described in detail.

Wave energy converters are typically classified into a vibrating water column type (for example, Japanese Patent Laid-Open No. 11-201014) and a movable object type, but are related to the energy converting apparatus utilizing the swing of the present invention. The thing is a movable object type. BACKGROUND ART Movable object type wave energy conversion device is an energy conversion device that takes in, as power, a movable object floating on a water surface swinging up, down, front, back, left and right due to wave motion, and many of its conventional techniques (for example, patents No. 3159881, Japanese Utility Model Laid-Open No. 01-166277) discloses a power extracting means for engaging a power extracting pulley, a wire or the like having one end connected to a movable object and a weight attached to the other end, and power extracting means. An energy conversion device configured to include power transmission means including a reversible unit that always transmits rotational movement in the same direction to a power transmission shaft regardless of the rotation direction of a pulley, and a generator that rotates through the power transmission shaft to generate electricity. In the above-mentioned Japanese Patent No. 3159881, the first power transmission means for transmitting the one-direction rotational movement of the power extraction pulley to the first power transmission shaft, and the other direction rotational movement to the second power transmission shaft. Second to communicate A power transmission means is provided, the first power transmission shaft and the second power transmission shaft are connected to each other, and the rotational movement of the power extraction pulley whose rotational direction is alternately changed can be easily converted into a one-way rotational movement. Is configured.

In most of these conventional techniques, the power transmission means, the generator, etc. are installed on the shore or a large structure, so that the installation place is restricted or the cost for installing a large structure is remarkably high. There is a problem that it will increase, but as an improvement technology, a short link chain in which a power transmission mechanism, a generator, etc. are mounted on a movable object, one end is connected to a tetrapot installed on the seabed and the other end is connected to a weight There is disclosed a technology (Patent No. 2857383) using the power extraction means.

Similarly, as an improved technique in which a power transmission means, a generator and the like are mounted on a movable object, the movable object is moored to an anchor on the seabed and the wire is not used as the power extraction means on the movable object. A technique in which a weight supported by springs from above and below is provided and the reciprocating motion of this weight is converted into motion (Japanese Patent Application Laid-Open No. 07-091
No. 223583) or a hollow container (movable object) having a closed structure moored to an anchor on the seabed by a flexible mooring member, which reciprocates horizontally in conjunction with rocking of the hollow container. There is also disclosed a technology (Japanese Patent Laid-Open No. 2000-283016) in which a horizontally long cylinder having a built-in cylinder is provided, and a generator is rotated by the flow of a working fluid by the reciprocating movement of a piston.

The power extraction means, power transmission means, etc. of the movable object type wave energy conversion device as described above can be used in the present invention.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation related to the energy conversion device for water flow or wind.
An object of the present invention is to provide an energy conversion device that can be installed on the surface of water, has high durability, is economical, and is efficient.

[0012]

In order to achieve the above-mentioned object, the invention of claim 1 is a device for converting water flow energy, which comprises a water surface rocker provided swingably and a water surface rocker. It has a water sink that is installed in the lower water and that can rotate around a rotation axis, and a rotation drive mechanism that drives the water sink to rotate.By rotating the water sink in a predetermined cycle, the water surface rocking body is periodically shaken. It is an energy conversion device designed to generate motion.

According to a second aspect of the present invention, there is provided a device for converting wind energy, which comprises a water surface rocker that is swingable, and a wind that is provided above the water surface rocker and rotatable about a rotation axis. An energy conversion device having a winder and a rotary drive mechanism that rotationally drives the wind receiver, and by causing the wind receiver to rotate at a predetermined cycle, the water surface rocking body is caused to periodically rock.

A third aspect of the present invention is an apparatus for converting the energy of a water flow and wind energy, which comprises a water surface rocker that is swingable, and a water shaft below the water surface rocker that rotates around a rotation axis. It has a possible water flow receiver, a wind receiver provided above the water surface rocker and rotatable about a rotation axis, and a rotation drive mechanism for rotationally driving the water flow receiver and the wind receiver. The energy conversion device is configured to cause periodic fluctuations in the water surface oscillating body by rotating the water surface oscillating body.

According to a fourth aspect of the present invention, in order to efficiently perform energy conversion, the predetermined rotation cycle is approximately twice the natural cycle of the water surface rocker.

According to a fifth aspect of the present invention, the stability of the water surface rocking body is improved, and the water flow receiver or wind receiver is a water flow receiver or wind receiver rotatable about a substantially vertical rotation axis. There, at least a pair of water jets or wind receivers are provided substantially symmetrically in the longitudinal direction along a direction perpendicular to the main traveling direction of the water flow or wind, and the rotation direction of the pair of water jets or wind receivers is reversed. The water oscillating body is configured so as to cancel the forces received through the pair of water flow receivers or wind receivers in the direction perpendicular to the main traveling direction of the water flow or wind.

According to a sixth aspect of the present invention, the water surface rocking body is constrained so as to be vertically movable and rotatable, and a support mechanism fixed to a water bottom or a shore is provided, and the water surface rocking body is vertically moved by the support mechanism. It is an energy conversion device movably and rotatably supported.

According to a seventh aspect of the present invention, the power extraction means for extracting the energy of the water flow or wind from the rocking motion of the water surface rocker is engaged with the power extraction pulley, and one end thereof is installed on the water bottom or the like. The wire mechanism includes a wire that is connected to a fixed object such as an anchor and the other end is connected to a weight.

According to an eighth aspect of the present invention, the power extracting means for extracting the energy of the water flow or wind from the rocking motion of the water rocking body is provided in the water rocking body and is interlocked with the rocking motion in the water rocking body. Including a cylinder having a built-in piston that reciprocates horizontally in a horizontal direction, a closed fluid circuit that connects two cylinder chambers partitioned by the piston of the cylinder, and a rotating body that rotates by the movement of the working fluid due to the reciprocating movement of the piston It is an energy conversion device with a mechanism.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is an energy conversion device mainly suitable for acquiring energy of a water flow or wind having a certain directionality, and by periodically changing the fluid force received by the water surface rocker, It is an energy conversion device that causes the water surface rocker to periodically rock, and extracts and converts energy from the periodic rocking of the water rocker.

First, as a first embodiment, an apparatus for converting water flow energy will be described. This is invention of Claim 1, Comprising: The water surface rocker provided so that it could rock | fluctuate, the water sink which is provided under the water of the water surface rocker, and is rotatable around a rotating shaft, and the water water sink is rotationally driven. The water oscillating body has a rotation drive mechanism, and the water sink is rotated at a predetermined cycle, and the fluid force received by the water sink is periodically changed to cause the water surface oscillating body to oscillate periodically.

The water flow receiver according to the present embodiment may be any one as long as it can change the fluid force received by rotating it about the rotation axis, and its shape is not particularly limited. Plate-shaped, paddle-shaped, or wing-shaped ones can be used. The rotary shaft of the water flow receiver is not particularly limited to the present invention, but it is desirable to provide it substantially vertically or substantially horizontally in view of simplification of the mechanism. As the rotary drive mechanism, an ordinary rotary drive mechanism such as an electric motor or a speed reducer can be used, and the detailed mechanism thereof does not limit the present invention.

The energy conversion device using the rocking motion of the present invention has the greatest feature in that the fluid motion received by the water surface rocking body is periodically changed to cause the water surface rocking body to periodically rock. The means for extracting energy from the rocking motion of the water surface rocking body is not particularly limited to the present invention, and has been described in the above-mentioned prior art.
The power extraction means, the power transmission means, etc. of the movable object type wave energy conversion device can be used. For example, Patent No.
As disclosed in Japanese Patent No. 2857383, a wire mechanism including a wire that is engaged with a power extraction pulley and has one end connected to a fixed object such as an anchor installed on the bottom of the water and the other end connected to a weight The present invention can be carried out by mounting a power transmission means including a reversible unit, a generator, etc. on the water surface rocking body as the extraction means. Further, as disclosed in Japanese Patent Laid-Open No. 2000-283016, a cylinder having a built-in piston that is provided inside the water surface rocker and that reciprocates in the horizontal direction in conjunction with rocking in the water surface rocker, and the piston of the cylinder A piston mechanism including a sealed fluid circuit that connects two cylinder chambers that are partitioned by each other and a rotating body that is rotated by the movement of the working fluid by the reciprocating movement of the piston is used as power extraction means, and the rotating body rotates a generator to generate electricity. It is also possible to suitably use the technique of doing in the present invention.

According to the first embodiment as described above, since the present invention does not require a mechanical portion such as a water turbine exposed in the sea, there is no problem that the life is shortened due to corrosion and the cost for maintenance is so high. Further, there is no problem that the mechanism part is damaged due to collision with a floating substance, and a highly durable and economical energy conversion device can be provided. In addition, even in a flow with slow fluctuations or little fluctuations such as tidal currents and river flows, pitching (rotational fluctuations in the front-back direction of the water surface rocker) is reliably created for efficient energy conversion. It can be performed.

Next, a device for converting wind energy will be described as a second embodiment. This is invention of Claim 2, Comprising: The water surface rocking body provided so that it could rock | fluctuate, the wind receiver which is provided above the water surface rocking body, and is rotatable around a rotation axis, and the rotation which rotationally drives the wind receiver The water oscillating body is provided with a drive mechanism, and the wind receiver is rotated at a predetermined cycle to periodically change the fluid force received by the wind receiver, thereby causing the water surface oscillating body to oscillate periodically.

The wind receiver according to the present embodiment may be any one as long as it can change the fluid force received by rotating it around the rotation axis, and its shape is not particularly limited. Plate-shaped, sail-shaped, or wing-shaped can be used. The rotation axis of the wind receiver is not particularly limited to the present invention, but it is desirable to provide it substantially vertically or substantially horizontally in terms of simplification of the mechanism. In addition, the rotation drive mechanism and the like can be implemented in the same manner as in the first embodiment.

According to the second embodiment as described above, the present invention does not have a problem such as noise, has no obstacles, is well ventilated, and allows wind power generation on a vast water surface which is a desirable installation place. It is possible and the place where it can be installed can be greatly expanded.

Next, as a third embodiment, an apparatus for converting the energy of the water flow and the energy of the wind will be described. This is the invention of claim 3, which is described in the first embodiment and described in the second embodiment, and the water sink provided in the water below the water surface rocker and rotatable about the rotation axis. Further, the wind receiver, which is provided above the water surface rocking body and is rotatable around the rotation axis, is also provided so that the energy of the water flow and the energy of the wind can be simultaneously converted. In this embodiment, the water flow receiver and the wind receiver are rotated at the same rotation cycle,
Further, the rotational phases of the water flow receiver and the wind receiver are adjusted so that the forces exerted on the water surface rocker by the water flow and the wind are in the same direction.

The fourth embodiment is the invention according to claim 4, wherein the rotation cycle of the water jet receiver or the wind receiver is set to be about twice the natural cycle of the water surface rocker. By this, energy conversion can be performed more efficiently by utilizing the resonance state. That is, by utilizing the resonance state, it is possible to cause a large swing in the water surface rocking body, and it is possible to perform energy conversion more efficiently. Although the natural period of the water surface oscillating body can be theoretically calculated, it is not always easy to calculate the natural period exactly, and it is possible to make fine adjustments in actual operation and perform energy conversion under optimal conditions. Therefore, in the present invention, it is desirable to be able to change the rotation cycle of the water flow receiver or the wind receiver.

Next, as a fifth embodiment, the water surface rocking body suitable for a case where the water flow receiver or wind receiver is a water flow receiver or wind receiver rotatable about a substantially vertical axis of rotation. An embodiment with improved stability will be described. This is the invention of claim 5, wherein at least one pair of water sinks or wind receivers is provided substantially symmetrically in the longitudinal direction along a direction perpendicular to the main traveling direction of the water flow or wind. The direction of rotation is reversed, and the water surface rocker receives the forces through the pair of water flow receivers or wind receivers so as to cancel out the forces in the direction perpendicular to the main traveling direction of the water flow or wind.

How many pairs of water flow receivers or wind receivers should be provided?
Generally, it is determined by the shape of the water surface rocker. For example, in the case of a cylindrical or small water surface rocker, a pair is formed. For example, in the case of an oblong water surface rocker, it is perpendicular to the main direction of flow of water or wind. By providing a plurality of pairs at appropriate intervals in different directions, one water surface rocker can effectively convert a wide range of energy, and the stability of the water surface rocker can be further improved.

Next, as a sixth embodiment, an embodiment in which the stability of the water surface rocking body is further improved will be described. This is an embodiment in which the water surface oscillating body is restrained so as to be vertically movable and rotatable, and a support mechanism fixed to a water bottom or a shore is provided, and the water surface oscillator is vertically movably and rotatably supported by the supporting mechanism. This is a form that can be suitably implemented on a river or a relatively shallow sea surface, which does not require a large-scale support structure.

That is, for example, as the support mechanism, a pair of columns fixed to the bottom of the water and having guide rails in the vertical direction,
Rotational support shafts provided at right angles to the main direction of water flow and provided on both sides of the water surface rocker are engaged with the guide rails.
As a result, the water surface rocking body can be constrained to move up and down along the guide rails and the rotation rocking around the rotation support shaft, and the stability of the water surface rocking body can be further improved. It is possible to solve the problem of structural strength that a complicated force acts on the supporting portion of the extraction pulley due to the complicated motion of the water surface wave.

According to the above-described embodiment, the present invention is an energy conversion device for converting energy of water flow or wind, which can be installed on the surface of water, is durable, is economical, and is efficient. An energy conversion device can be provided. The present invention also causes the water oscillating body to oscillate in a predetermined cycle, and extracts energy from the oscillating water surface oscillating body in a predetermined cycle, so that the generator operates with high efficiency in a specific cycle range. Thus, it is possible to provide a highly efficient energy conversion device.

[0035]

Embodiments of the present invention will be described below with reference to the drawings. As described above, in the present invention, the means for extracting energy from the swing of the water surface rocking body can use the power extracting means, the power transmitting means, etc. of the conventional moving object type wave energy converter. Therefore, its illustration is omitted, and its detailed description is also omitted.

First, as a first embodiment, an embodiment of an energy conversion device of the present invention for converting tidal water flow energy will be described. FIG. 1 is a schematic configuration diagram of the first embodiment, including (A) a plan view, (B) a side view seen from a direction perpendicular to the main traveling direction of a water stream, and (C).
It is a three-sided view of the side view seen from the main advancing direction of the water stream.

In FIG. 1, reference numeral 1 is a water surface rocker provided so as to be rockable, and 2 is a water sink provided under water below the water surface rocker 1 and rotatable around a substantially vertical axis of rotation. In the present embodiment, two-to-four type (2a, 2b, 2c and 2d) symmetrical plate-shaped water flow receivers are provided along the direction perpendicular to the main direction of travel of the water flow, and 2a and 2d, 2b and 2c form a pair that are symmetrical in the front-rear direction. The water flow receiver 2 is configured to be rotated at a predetermined cycle by a rotation drive mechanism (not shown) mounted on the water surface rocking body 1. Reference numeral 3 is a wire that moorably anchors the water rocking body 1. In the present embodiment, the water rocking body 1 is fixed by four wires (3a, 3b, 3c and 3d) having one end fixed to the seabed. Moored.

In such a structure, the water sink 2 is rotated at a predetermined cycle to change the area of the water sink 2 that shields the water flow with time, and the fluid force received by the water sink 2 is periodically changed, thereby It is possible to cause the rocking body 1 to rock periodically. At this time, it is important to rotate the 4 type water sinks in the same cycle and the same phase, whereby the fluid force received by the 4 type water sinks can be efficiently transmitted to the water surface oscillating body 1. The water flow receivers (2a and 2d, 2b and 2c) forming a pair have their rotation directions reversed, and the water surface oscillating body 1 receives the water flow receivers through the pair of water flow receivers at right angles to the main traveling direction of the water flow. Let the forces of each other cancel each other out. Thereby, the stability of the water surface rocking body 1 can be improved.

The water surface rocker 1 produced as described above
From the periodic swinging of the wire, for example, a wire, not shown, engaged with a power extraction pulley, one end of which is connected to a fixed object such as an anchor installed on the bottom of the water and the other end of which is connected to a weight. A wire mechanism including a power extraction means, and the power transmitted from the power extraction means to the power extraction pulley is transmitted to the power transmission shaft as unidirectional rotation power by the power transmission means including the reversible unit, and is transmitted through the power transmission shaft. By rotating the generator to generate electricity, the water flow energy can be finally converted and acquired as electric energy.

Next, as a second embodiment, use of the resonance state, which is important in the present invention, will be described. That is, the rotation period of the water flow receiver or the wind receiver is set to be about twice as long as the natural period of the water surface rocking body, and by utilizing the resonance state, a large rocking motion of the water surface rocking body can be generated. Energy conversion can be performed more efficiently.

When the water surface oscillating body is modeled by a uniform rectangular parallelepiped, the inclination angle from the equilibrium horizontal plane is θ, the total mass density of the water surface oscillating body is σ, the water mass density is ρ, and the gravitational acceleration is g.
And then, water rocking water flow direction a of the horizontal dimension of the body, the water flow perpendicular method b (a> b), the height c, and the minor axis (length b) around the moment of inertia ^{I (= σbca 3/12)} , water the short-axis around the second moment of the draft surface of the oscillator I _y (= ba ^3/1
2), the equation that describes the rotational motion of the water surface oscillator is
It is approximately given by the following equation.

"Equation 1" I (d ² θ / dt ² ) + ρg I _y θ = 0 (d ² θ / dt ² ) + (ρg / σc) θ = 0

From this, the angular frequency ω of the resonance motion is (ρg / σc) ^1/2 and the natural period T is 2 with the pi being π.
It is represented by π / ω = 2π (σc / ρg) ^1/2 . For example, when the average specific gravity of the water surface oscillator is 0.8 and the height is 6 m, the natural period is about
It will be 4.4 seconds.

As described above, when the water oscillating body is modeled as a simple structure, the natural period of the water oscillating body can be easily obtained. However, the actual water oscillating body has a complicated structure. However, it is not always easy to strictly calculate the natural period, and fine adjustment in actual operation is possible and energy conversion under optimal conditions is possible, so the rotation period of the water flow receiver or wind receiver can be changed. It is desirable to adopt the following configuration.

Next, as a third embodiment, the rocking of the present invention for converting water flow energy, which is suitable for installation on a river or a relatively shallow sea surface which does not require a large-scale support structure, is used. An example of the energy conversion device will be described. FIG. 2 is a schematic configuration diagram of the third embodiment,
It is a three-view drawing of (A) a plan view, (B) a side view seen from a direction perpendicular to the main traveling direction of the water flow, and (C) a side view seen from the main traveling direction of the water flow.

In FIG. 2, reference numeral 1 is a rotary support shaft 6 on both side surfaces.
The water surface oscillating body 2 having a and 6b is the same as that of the first embodiment, and is provided in the water below the water surface oscillating body 1 and can rotate about a substantially vertical axis of rotation (2a, 2b). , 2c and 2d), the water sinks 5 are provided at right angles to the main traveling direction of the water flow, are fixed to the bottom of the water, and have a pair of columns (5a, 5b) having guide rails 7 (7a, 7b) in the vertical direction.
b). Rotating support shafts 6 provided on both side surfaces of the water surface rocking body 1.
a and 6b are the vertical movements of the guide rails 7a and 7b along the guide rails 7a and 7b, and the rotation support shaft 6a.
6b is engaged so as to be swingable around the center.

According to this embodiment, the water surface rocking body 1 is moved up and down along the guide rails 7a and 7b, and the rotary support shaft 6 is moved.
The water surface oscillating body 1 is constrained by the rotational shake around a and 6b.
The stability of the structure can be improved, and the structural strength problem that a complicated force acts on the supporting portion of the device, particularly the power extraction pulley due to the complicated motion of the water surface wave can be solved.

Although the embodiments of the present invention have been described above, various changes may be made in the form and details without departing from the spirit and scope of the present invention defined in the claims. it is obvious.

For example, in the above-mentioned embodiment, the energy conversion device provided with the two-to-four type water flow receiver has been described, but the number of the water flow receivers may be one, one, or three or more. Is not limited. Further, in the above embodiment, the device for converting the water flow energy has been described, but as described in detail in the embodiment of the invention, the wind receiver rotatable about the rotation axis is provided above the water surface rocking body, The energy of the wind can be converted, and further, the water flow receiver and the wind receiver can be provided to convert the energy of the water flow and the energy of the wind.

[0050]

As described above, according to the present invention, by rotating the water flow receiver and the wind receiver at a predetermined cycle, the fluid force received by the water surface rocker is periodically changed, and the water surface rocker is caused to periodically rock. It is an energy conversion device that extracts and converts energy from the rocking of the rocking body, has no problems such as noise, can be installed on a vast water surface with no obstacles and good ventilation,
Since it does not require a mechanical part such as a water turbine exposed in the sea, there is no problem of shortening the service life due to corrosion and soaring maintenance costs, it is highly durable and economical, and the rotation cycle is There is an effect that it is possible to provide a device that can efficiently perform energy conversion by approximately doubling and utilizing resonance. In addition, even in a flow such as a tidal current or a flow of a river in which the fluctuation is slow or hardly fluctuates, there is an effect that rocking can be reliably generated in the water surface rocking body and energy conversion can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment, including (A) a plan view, (B) a side view seen from a direction perpendicular to a main direction of water flow, and (C) a main direction of water flow. FIG. 3 is a three-sided view of a side view seen from above.

FIG. 2 is a schematic configuration diagram of a third embodiment, including (A) a plan view, (B) a side view as seen from a direction perpendicular to the main direction of travel of the water stream, and (C) a main direction of travel of the water stream. FIG. 3 is a three-sided view of a side view seen from above.

[Explanation of symbols]

1 ----- Water rocker 2 ----- Water sink 3 ----- Wire 5 ----- Support 6 ----- Rotating spindle 7 ----- Guide rail

Claims (8)

[Claims] 1. A water surface rocking member provided so as to be rockable, a water flow receiver which is provided under water below the water surface rocking member and is rotatable around a rotation axis, and a rotation drive mechanism which rotationally drives the water water flow receiver. An energy conversion device using rocking, characterized in that the water rocking body is caused to periodically rock by rotating the water sink at a predetermined cycle. 2. A water surface rocking body provided swingably, a wind receiver provided above the water surface rocking body and rotatable around a rotation axis, and a rotary drive mechanism for rotationally driving the wind receiver. An energy conversion device utilizing rocking, wherein the water surface rocking body is periodically rocked by rotating the wind receiver at a predetermined cycle. 3. A water surface rocker provided so as to be rockable, a water sink provided under water below the water surface rocker and rotatable about a rotation shaft, and a rotation shaft arranged above the water surface rocker. A wind receiver rotatable around the water receiver, and a rotation drive mechanism for rotationally driving the water flow receiver and the wind receiver. By rotating the water flow receiver and the wind receiver at a predetermined cycle, the water surface rocking body is periodically rotated. An energy conversion device utilizing rocking, which is characterized by causing various rocking. 4. The swing according to any one of claims 1 to 3, wherein the predetermined rotation cycle is a rotation cycle approximately twice as long as the natural cycle of the water surface oscillating body. Energy conversion device. 5. The water flow receiver or wind receiver is a water flow receiver or wind receiver rotatable about a substantially vertical rotation axis, and the water flow receiver or wind receiver is defined as a main traveling direction of the water flow or wind. At least one pair is provided symmetrically in the longitudinal direction along the direction at right angles, the rotation directions of the pair of water flow receivers or wind receivers are reversed, and the water surface rocker receives the pair of water flow receivers or wind receivers. Alternatively, the energy conversion device using oscillation according to any one of claims 1 to 4, characterized in that the forces in the direction perpendicular to the main traveling direction of the wind cancel each other out. 6. A support mechanism fixed to a water bottom or a landshore is provided, and the water surface rocking body is supported by the support mechanism so as to be vertically movable and rotatable. An energy conversion device utilizing the oscillation described in. 7. A fixed object such as an anchor, one end of which is installed on a water bottom or the like, by engaging a power extraction pulley with power extraction means for extracting water flow or wind energy from the rocking motion of the water surface rocking body. The energy conversion device using oscillation according to any one of claims 1 to 5, which is a wire mechanism including a wire that is connected to and connected to a weight at the other end. 8. A power extraction means for extracting energy of water flow or wind from the rocking motion of the water rocker is provided in the water rocker in a horizontal direction in association with rocking in the water rocker. A piston mechanism including a cylinder having a built-in piston that reciprocates, a sealed fluid circuit that connects two cylinder chambers partitioned by the piston of the cylinder, and a rotating body that is rotated by the movement of the working fluid due to the reciprocating movement of the piston. The energy conversion device using oscillation according to any one of claims 1 to 6.