WO2002059480A1 - Movable object type wave power energy converter - Google Patents

Abstract

A movable object type wave power energy converter, wherein a generator and a power extracting means having power extracting pulleys engaged with wires and a reversible unit are mounted on a movable object, and at least a pair of wire mechanisms having fixed objects such as anchors installed at a sea bottom, weights, and wires having one ends connected to the fixed objects and the other ends connected to the weights are installed along a major wave advancing direction and generally symmetrically in longitudinal direction, and the wire mechanisms are installed additionally in the direction perpendicular to the major wave advancing direction so that the energies caused by the vertical movement, horizontal movement, and rotating swing of the movable object by wave can be extracted effectively.

Description

 Specification

 Moving object type wave energy converter Technical field

 The present invention relates to a wave energy conversion device, and more particularly to a low-cost, high-efficiency movable-object-type wave energy conversion device. Technology background

 Wave 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, and has established a technology to utilize wave energy. This has crucial implications for the future when energy resource depletion is inevitable. For this reason, a great deal of research and development has been performed on wave energy conversion devices. A wave energy conversion device is a primary conversion device for converting wave energy into other mechanical energy, and a device for converting the mechanical energy obtained by the primary conversion device into easily usable energy such as electricity. A primary conversion device is typically composed of a vibrating water column type and a movable object type. The vibrating water column type is disclosed in, for example, Japanese Patent Application Laid-Open No. H11-200. As shown in No. 104, a container with a closed air chamber at the top and an opening at the bottom for seawater to enter and exit was used. It creates pressure fluctuations in the air chamber and the air chamber, and creates an air flow based on the pressure difference between the inside and outside of the container.Using this air flow, the air turbine, which is a secondary conversion device, is rotated. To generate electricity.

The vibrating water column type does not require any moving parts in the primary Containers with closed air chambers must be pressure-resistant and air-tight, require a large amount of steel and concrete, and have an excellent air turbine. They are complex and expensive, and have the problem of soaring power generation costs.

 The movable object type captures the movement of a movable object placed near the water surface by the movement of the water wave as power, and the movable object and the motion transmission means for transmitting the motion of the movable object. The apparatus includes a motion converting mechanism for converting the transmitted motion into a motion for driving a secondary conversion device such as a generator.

 Many of the prior arts of such a movable object type wave energy conversion device have been developed.

(For example, Japanese Patent Application Laid-Open No. 08-270417, Japanese Utility Model No. 01-1662777) is a single wire having one end connected to a movable object and the other end attached to a weight. Was used as a means of transmitting motion, and a motion conversion mechanism and a generator were installed on the shore or on a large floating body. It was difficult to efficiently transmit and convert energy, and there was a problem that the installation location was restricted or the cost increased significantly due to the installation of a large floating body.

Mobility conversion mechanism, generator, etc. are mounted on a movable object, and as a technology to avoid cost increase due to restrictions on installation location and installation of large floating body, the movable object is moored to an anchor on the sea floor, A technology has been disclosed in which a weight supported by a panel from above and below is provided on a movable object, and the reciprocating motion of the weight is converted into motion (Japanese Patent Application Laid-Open No. 07-230358). Since the weight is supported by the panel, only reduced motion can be transmitted, and only one-directional energy of the motion of the movable body due to waves can be extracted, and efficient wave energy conversion cannot be performed. Is left. Similarly, as a technology in which a motion conversion mechanism, a generator, and the like are mounted on a movable object, one end is connected to a tetrapod installed on the seabed, and a short link is attached to the other end. A technology in which one is used as a motion transmission means, and the short link is engaged with a sprocket, which is a motion conversion mechanism.

(Patent No. 2,857,833) is disclosed. In this prior art, the short link tinnine has a very simple structure that also serves as a mooring for a movable object, but basically can only extract energy in one direction of motion of the movable object due to waves. For example, the energy of the rotation fluctuation of the moving object with the sprocket as a fulcrum cannot be extracted. In addition, when the movable object is caused to flow in the horizontal direction, the amount of movement of the short link chain in the sprocket becomes smaller than the amount of vertical movement of the movable object. The problem is that even the energy of vertical movement cannot be converted sufficiently. In addition, there are also mechanical problems, such as the invasion of waves from various directions, which inevitably creates a conflict between the sprocket and the short-link chain.

 An object of the present invention is to provide a low-cost, high-efficiency, movable-object-type wave energy conversion device that is not restricted by its installation location in view of the above-described circumstances related to the wave energy conversion device. . Disclosure of the invention

In order to achieve the above-mentioned object, a movable object type wave energy converting apparatus of the present invention comprises a fixed object such as an anchor installed on the seabed, a weight and one end connected to the fixed object, and the other end connected to the weight. Mechanism, including a wire that includes a wire, a generator, a power extraction pulley engaged with the wire, and a reversible unit that always rotates the generator in the same direction regardless of the rotation direction of the power extraction pulley. Power extraction means, including a generator and power extraction means And at least one pair of wire mechanisms are provided generally symmetrically in the front-rear direction along the main traveling direction of the wave.

 Further, there is provided a movable-object-type wave energy conversion device further comprising at least one pair of the wire mechanism further provided in a direction perpendicular to the main traveling direction of the wave and substantially symmetrically in the longitudinal direction.

 Further, depending on the wave conditions at the place where the movable object type wave energy conversion device of the present invention is installed, the fixed object may be installed on the seabed far from the movable object, and the fixed object may be placed between the fixed object and the movable object. This is a movable object type wave energy conversion device in which the wire is inclined.

 According to the present invention, the wire mechanism is configured such that a wire between the fixed object and the movable object is substantially vertical, and the wire mechanism is a first wire mechanism. A second fixed object such as an anchor installed on a distant sea floor, an elastic mechanism with one end fixed to a movable object, and one end connected to the second fixed object and the other end connected to the other end of the elastic mechanism. A second wire mechanism including a connected second wire; and a power extraction pulley and a power extraction pulley that engage with the second wire. Firstly, there is a second power extraction means including a reversible unit that always rotates the electric machine in the same direction, and the second wire mechanism is slightly symmetrical in the front-back direction along the main traveling direction of the wave. Are also provided as a pair.

 In addition, the second wire mechanism is further provided with at least one pair in a direction perpendicular to the main traveling direction of the wave and substantially symmetrically in the front-rear direction. It is further provided with an object to receive the water and a plate to receive the resistance of the water.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows a first embodiment of the present invention in a direction perpendicular to a main traveling direction of a wave. It is the schematic side view seen from.

 FIG. 2 is a schematic plan view of the first embodiment of the present invention as viewed from above. FIG. 3 is an embodiment of a schematic configuration of the power extraction means including the power extraction pulley and the reversible unit of the present invention. FIG.

 FIG. 4 is a perspective view showing a schematic configuration of a movable object according to a second embodiment of the present invention further provided with an object receiving wind power and a plate receiving water resistance. Explanation of reference numerals

 1 movable object

 2 First anchor

 3 First wire

 Four

 5 Power extractor

 6 Second anchor

 7 Second wire

 8 Spring wound

 9 1 0… Free pool section

 1 1, 1 2, 1 3, 1 4 Free pool

 1 7… Pulley for power extraction

 1 8… Reversing unit

 3 1… Wind catch mechanism

 3 2… Water flow receiving mechanism Best condition for carrying out the invention

First, one end was connected to a fixed object installed on the seabed, and the other end was connected to a weight. A description will be given of an embodiment of the present invention in which at least one pair of first wire mechanisms including wires are provided along the main traveling direction of the wave, and at least one pair is generally symmetrical in the front-rear direction. Is usually approximately perpendicular to the contour line.

 The pulley for power extraction arranged on the movable object is engaged with the wire, and repeats inversion due to the vertical movement, horizontal movement, or rotation of the movable object, but the power is pulled through the reversible unit. The generator always rotates in the same direction regardless of the direction of rotation of the extraction pulley. It is desirable that the power extracting means is configured to connect a rotating shaft that extracts a rotational motion in a certain direction, or to use a bevel gear or the like so as to enable torque synthesis. The temporal fluctuation of the combined rotational motion is generally equalized to some extent because the phases of the vertical movement, horizontal movement, and rotational fluctuation of the movable object are not uniform. Further, after all the rotational forces are combined, the unevenness of the rotational movement can be further removed via the flywheel.

 Examples of the reversible unit include well-known techniques, such as a one-way clutch disclosed in Patent No. 2857383, Japanese Patent Application Laid-Open No. 08-210174, and the like. A combination of the two can be used, and the detailed mechanism of the reversible unit does not limit the present invention.

How many pairs of wire mechanisms are provided is generally determined by the shape of the movable object.For example, a cylindrical or small movable object is paired, and a long rectangular movable object is movable. The longitudinal direction of the wave is arranged at right angles to the main traveling direction of the wave, and a plurality of pairs are provided at appropriate intervals in the longitudinal direction, so that a wide range of wave energy can be effectively absorbed by one movable object. Can convert and improve the stability of moving objects In the present embodiment, since the first wire mechanism also serves to moor the movable object, it is desirable to provide a shock absorbing mechanism at the position of the movable object that comes into contact with the weight when the movable object flows.

 Since the wave energy conversion device of the present invention according to the above-described embodiment has a generator and the like mounted on a movable object, it is not restricted by an installation place and has a simple configuration that does not require a large floating body. , Low cost. In addition, along with the main traveling direction of the wave, the first wire mechanism, which is provided approximately symmetrically in the front-rear direction, can extract energy such as rotational sway as the movable object moves up and down. As a result, it is possible to efficiently convert wave energy.

 According to the present invention, in an installation place where the traveling direction of a wave often varies from time to time, the first wire mechanism is moved substantially forward and backward along a direction perpendicular to the main traveling direction of the wave. By providing at least one pair symmetrically, it is possible to respond efficiently to waves from any direction, and to convert wave energy more efficiently. In addition to improving the stability, the stability of the movable object can be improved.

 In addition, when only the first wire mechanism is provided as described above, a fixed object may be installed on the sea floor far from the movable object, depending on the wave conditions at the installation location, and the fixed object and the fixed object may be installed. It is configured so that the wire between it and the movable object is inclined. That is, an appropriate tilt angle is selected according to the components of the vertical and horizontal movements of the wave force.

 Table 1 shows the wire inclination angle between the fixed object and the movable object, with the water depth being 40 m and the moving amount of the movable object being a parameter, for the vertical wire and the 45-degree inclined wire. 6 is a table showing an example of a relationship between a moving amount extraction rate, a power extraction pulley wire moving amount, and a moving object moving amount).

【table 1 】 Object movement 2.0 m 4.0 m 6.0 m Direction of movement Vertical movement Horizontal movement Vertical movement Horizontal movement Vertical movement Horizontal movement Wire 100% 2.5% 100% 5.0% 100% 7.5%

45 degree wire 71.6% 71.6% 72.4% 72.4% 73.2% As shown in Table 1, take out by the wire inclination angle between the fixed object and the movable object Since the moving amount extraction rate that can be changed greatly changes, it is desirable to select an appropriate inclination angle according to the components of the vertical and horizontal movement of the wave force at the installation location.

 Next, the first wire mechanism is configured such that a wire between a fixed object and a movable object is substantially vertical, and further, a second wire mechanism and a second power extracting means are provided. An embodiment of the present invention will be described in which at least one pair is provided substantially symmetrically in the longitudinal direction along the main traveling direction of the wave.

 In the present embodiment, the first wire mechanism is configured such that the wire between the fixed object and the movable object is substantially vertical, and the movement and rotation of the movable object body are mainly performed. The second wire mechanism and the second power extraction means are used mainly for horizontal energy extraction and mooring of a movable object.

 In other words, the first wire mechanism is arranged so that the wire between the fixed object and the movable object is substantially vertical so that the energy of the vertical movement and the rotation of the movable object due to the waves can be extracted with maximum efficiency. The second wire mechanism is configured to place a second fixed object on the sea floor far from the movable object, tilt the second wire between the second fixed object and the movable object, It is designed to extract the energy of the horizontal motion of a movable object with high efficiency.

The second wire mechanism is a stretchable elastic with one end fixed to a movable object. It has a mechanism to apply a restoring force to a movable object that attempts to move in the horizontal direction by a wave, and to apply tension and movement to the second wire when moving or restoring the movable object in the horizontal direction. More wave energy is extracted.

 The configuration and operation of the second power extracting means or the torque synthesis are the same as those of the first power extracting means. The number of pairs of the second wire mechanism or the number of the second wire mechanism in the direction perpendicular to the main traveling direction of the wave is determined in the case of the first wire mechanism. Similarly to the above, according to the embodiment of the present invention further provided with the second wire mechanism and the second power extraction means, which is determined by the condition of the movable object, the condition of the wave at the installation location, and the like. This makes it possible to convert the power of the vertical movement, horizontal movement, and rotational sway of the movable object into energy for rotational movement without waste, and to convert wave energy more efficiently. Further, since the movable object is moored by the second wire mechanism having an elastic elastic mechanism having one end fixed to the movable object, the stability of the movable object can be further enhanced.

 Next, an embodiment of the present invention will be described in which a movable object is further provided with an object receiving wind power and a plate receiving resistance of water.

The most significant feature of the present invention is that by providing a plurality of wire mechanisms, the power of up / down movement, horizontal movement, and rotational fluctuation of a movable object can be converted with high efficiency. As a form that can more effectively implement the feature, depending on the wind situation at the installation location, the movable object may be rotated above the water surface so that the wind causes the movable object to rotate and shake. Provide an object to receive the wind, for example, a sail. This makes it possible to extract wind energy as well, and realize a more efficient wave energy conversion device. In addition, in order to obtain a wide range of wave energy, a plate that is easily affected by water is protrudingly installed below the surface of the movable object, thereby achieving high efficiency wave energy conversion. The device becomes possible.

 【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As a first embodiment, a pair of a first wire mechanism and a second wire mechanism are provided in a substantially symmetrical manner in the longitudinal direction along the main traveling direction of a wave. The wave energy conversion device of the present invention in which each pair is provided substantially symmetrically in the front-rear direction along the direction perpendicular to the direction will be described.

 FIG. 1 is a schematic side view of the first embodiment viewed from a direction perpendicular to the main traveling direction of waves, and FIG. 2 is a schematic plan view viewed from above. Figure

FIG. 3 is a plan view showing an embodiment of a schematic configuration of a power extraction means including a power extraction pulley and a reversible unit.

 In FIG. 1, 1 is a movable object, 2 is a first anchor installed on the sea floor almost vertically below the movable object 1, 3 is a first wire, 4 is a weight, and 5 is a power source. Power extraction unit including extraction pulley, etc., 6 is the second anchor installed on the sea floor far from the movable object 1, 7 is the second wire, 8 is the elasticity with one end fixed to the movable object 1. Spring wound spring, which is an elastic structure of

Reference numerals 9 and 10 denote free pulleys which support the first wire 3 and the second wire 7.

The first wire mechanism includes, for example, a first wire 3 a having one end connected to the first anchor 2 a, a power extraction unit 5 via a free pool unit 9, and a power extraction unit 5. After that, the weight 4a is connected to the other end via the free pulley section 10 on the opposite side, and then lowered to tension the first puller 3a. And the first wire 3a between the first anchor 2a and the free pool section 9 is configured to be substantially vertical. . Such a first wire mechanism is provided in a substantially symmetric pair, and

A pair is also provided in the depth direction (direction perpendicular to the main traveling direction of the wave) in the figure, but the pair in the depth direction in the figure is omitted.

 The second wire mechanism includes, for example, a second wire 7a connected to the second anchor 6a, a free pulley unit 9, a power extraction unit 5 via a free pulley unit 9, and a power extraction unit 5. (Not shown), and then the other end is connected to the winding panel 8a, and the second puller 7a between the second anchor 6a and the free pulley section 9 is inclined. It is configured. A pair of such second wire mechanisms is provided substantially symmetrically, and a pair is also provided in the depth direction in the figure, but the pair in the depth direction in the figure is omitted.

 In FIG. 2, 11a, 12b, 13a, and 14a are free pools constituting the free pool section 9 of FIG. 1, and llb, 12a.13b, 1 and 14 b are the same as those in FIG. 1 except for the free pool constituting the free pool unit 10 in FIG. Note that, similarly to FIG. 1, the wire mechanism and the like in the upward and downward direction (direction perpendicular to the main traveling direction of the wave) are not shown.

 In the wave energy conversion device according to the present invention in which the wire mechanism is provided substantially symmetrically, no rotational moment about the vertical axis is generated in the movable object due to the tension of the symmetrically arranged wires. Although such considerations are necessary, in this embodiment, as shown in FIG. 2, the anchor 6 is installed far from the movable body 1 and the second wire using the inclined wire 7 is used. The free pull mechanism 13 is arranged such that the second wire 7a and the second wire 7b on the outer side of the outer periphery of the movable object 1 are aligned with each other on the horizontal drawing. And free pools 14 are arranged.

Figure 2 does not show such considerations for the first wire mechanism where anchor 2 is installed almost vertically below movable object 1. Similar considerations are made to improve the stability of body 1. At this time, the heights of the free bulge for the first wire function and the free bully for the second wire mechanism provided on the outer periphery of the movable object 1 are arranged differently, and both wires are arranged. Avoid crossover.

 FIG. 3 is a plan view showing an embodiment of a schematic configuration of power extraction means including a power extraction pulley and a irreversible unit, which constitutes the power extraction unit 5 of FIG. 1. 1 is a representative illustration of a power extracting means including a power extracting means including a power extracting pulley engaged with a wire 3a of FIG. A similar extraction means is provided for each wire and constitutes the power extraction unit 5 of FIG.

 In FIG. 3, 17a is a pulley for power extraction, 18a is a reversible unit, and 18a is a pulley support shaft 21a for power extraction, a one-way clutch. Flanged flanges 2 2a, 23a, a pair of gears 24a, a pair of sprockets 25a, a chain 26a, a flange 27a, 28a, It consists of a power transmission shaft 29a.

 Next, the operation of the present embodiment configured as described above will be described (

In the present embodiment, the first wire between the first anchor 1 and the movable object 1 is taken out so that the energy of the vertical movement and the rotational fluctuation of the movable object 1 due to the wave can be extracted with maximum efficiency. A first wire mechanism is provided in four directions of the movable object 1 so that the second wire 3 is substantially vertical, and a second wire mechanism 7 between the second anchor 6 and the movable object 1 is provided. Are tilted so that the energy of the horizontal motion of the movable object 1 due to the waves can be extracted with high efficiency. The second gear mechanisms are provided in the four directions of the movable object 1. In the first wire mechanism, the weight of the first wire 3 is generated by the weight 4 connected to one end, and the vertical movement and rotation fluctuation of the movable object 1 are mainly generated. Perform extraction. For example, the first wire 3a connected to the first anchor 1a and the weight 4a is connected to the power extraction pool of the power extraction unit 5 via the free pools 11a and 12a. Engage with 17 a and rotate the power extraction bully 17 a alternately forward and reverse with the vertical movement of the free pulley 11 a installed at the right end of the movable object 1. The power transmitted to the power extraction pull 17a passes through the power extraction pulley support shaft 21a, and a flange 22a with a one-way clutch, a pair of gears 24a and a pair of gears 24a. The mechanism with the flange 27a and the mechanism with the flange 23a with a one-way clutch, a pair of sprockets 25a, the chain 26a and the flange 28a. Therefore, regardless of the rotation direction of the power extraction pulley 17a, the power is always transmitted to the power transmission shaft 29a as a rotational motion in the same direction.

 The power transmitted to the power transmission shaft 29a as a rotational motion in the same direction is the power of another wire mechanism similarly converted by connecting the power transmission shaft or using a bevel gear or the like. After the torque of the rotary motion is removed through the flywheel, the generator is driven and converted into electric energy by a secondary method. These are known technologies, for example, The techniques disclosed in Japanese Patent Publication No. 28577383 and Japanese Patent Application Laid-Open No. 08-240174 can be used, and are not shown.

In the second wire mechanism, the tension of the second wire 7 is generated by the winding panel 8 having one end fixed to the movable object 1, and the energy conversion of the horizontal movement of the movable object 1 is mainly performed. . For example, the second wire 7a connected to the second anchor 16a and the helical spring 8a passes through the free pulleys 13a and 14a to the power extraction pulley of the power extraction unit 5. (Not shown) to apply a restoring force to the movable object 1 that attempts to move in the horizontal direction by the waves, The brewery for power extraction is alternately rotated forward by the tension and movement of the wire 7a of 2, Reverse rotation.

 The configuration and operation after the power extraction boogie are the same as those of the first wire mechanism, and a detailed description thereof will be omitted.

 Note that the second wire mechanism also has a function of mooring the movable object 1.

 As described above in detail, according to the present embodiment, since the generator and the like are mounted on the movable object, there is no restriction on the installation location, and furthermore,

The simple configuration that does not require a large floating body enables the implementation at low cost. In addition, the first wire is configured so that the wire between the anchor and the movable object is substantially vertical so that the energy of the vertical movement and the rotation fluctuation of the movable object due to the waves can be extracted with maximum efficiency. Mechanisms are provided in four directions of the movable object, and a wire between the anchor and the movable object is inclined, so that the energy of horizontal movement of the movable object due to waves can be extracted with high efficiency. Since the mechanisms are provided in the four directions of the movable object, the power of the vertical movement, horizontal movement, and rotational fluctuation of the movable object due to the waves can be converted into energy with high efficiency.

 Further, since the movable object is moored from four directions by the second wire mechanism having an elastic elastic mechanism having one end fixed to the movable object, the stability of the movable object can be improved. It can be.

 In addition, since the free pool position on which the downward force acts is above the point of application of the buoyancy, which is the upward acting force, the rotational force of the rotation of the movable object is induced, which is advantageous in energy gain.

Next, as a second embodiment, an embodiment of the present invention in which a movable object is further provided with an object receiving wind and a plate receiving resistance of water will be described. FIG. 4 is a perspective view showing an embodiment of a schematic configuration of a movable object according to the present invention further provided with a plate receiving a wind resistance and water resistance. In the above, 1 is a movable object, 31 is a wind receiving mechanism installed above the movable object 1, and 32 is a water flow receiving mechanism provided below the movable object 1.

 The wind receiving mechanism 31 is used to obtain wind energy by utilizing the fact that the movable object 1 undergoes a rotational sway due to intermittent wind load above the movable object 1. It is provided at the upper part and includes a frame of a radial structure formed in a radial shape with a steel frame or the like, and a plurality of plates suspended from above in the frame.

 The vertical frame has a groove that allows the use of multiple lanes so that multiple plates can be moved up and down freely, and the plate or groove has a mouth that allows the plate to move up and down smoothly. Although one roller is provided, these are not shown. As a result, the plate can be placed only in a low place in a strong wind, and it is possible to prevent the movable body 1 from being subjected to a strong wind that impairs the stability.

 The water flow receiving mechanism 32 is for obtaining a wide range of wave energy, and is provided to protrude below the movable object 1 and is configured by radiating a plate receiving water resistance.

 According to the present embodiment, it is possible to extract wind energy together, and it is possible to obtain a wide range of wave energy, so that a more efficient wave energy conversion device is possible. Becomes

 Although the embodiments of the present invention have been described in detail above, various changes may be made in the form or details without departing from the spirit and scope of the present invention defined in the appended claims. The good is clear.

For example, in the above embodiment, the second fixed object is an anchor similar to the first fixed object, but as described in detail in the embodiment of the invention, the movable object and the fixed object are connected to each other. The horizontal movement energy can be extracted more efficiently as the wire between them is closer to the horizontal. Therefore, mainly horizontal movement The second wire mechanism that extracts the energy of the stake is, for example, a movable stake that is formed by connecting the second fixed object to a stake fixed to the seabed and connecting a second wire to the upper end of the stake. The inclination of the wire between the object and the pile can be made nearly horizontal, and the wave energy can be converted more efficiently.

 Further, in the above-described embodiment, the helical spring, which is an elastic mechanism having one end fixed to the movable object, is provided only linearly. However, the horizontal movement of the movable object is relatively large, and the movable object has a relatively large horizontal movement. When the horizontal dimension is small, for example, it is necessary to connect wires and elastic mechanisms alternately, and to change the direction by the free pool at the wire part, and to configure it in multiple stages. The length of the elastic mechanism can be ensured. In this case, the space above the movable object can be more effectively used by configuring the movable object in multiple stages with different heights.

 Further, in the above embodiment, the direction of the wire in the vertical plane is changed by one free pulley provided in the periphery of the movable object, but by a plurality of free pulleys. By changing the direction in multiple stages, it is possible to reduce the burden on the bearing of each free bully. In other words, if the half of the angle formed by the wires sandwiching the free pull is set to 0 and the tension of the wire is T, the load of the free pulley bearing is 2 T cos Θ By changing the direction in multiple stages by using a plurality of free pulls so as to increase the angle formed by the wires, the burden on the bearing of each free pull can be reduced. Can be done.

Further, in the above embodiment, the free pool is provided around the movable object. However, by providing the free pool so as to protrude horizontally outside the movable object, the free pool is provided. The motion of rotational fluctuation can be amplified and extracted, and the wave energy conversion can be performed more efficiently. In addition, the period of the wave changes with the day, but the natural period of the movable object or the like floating in the water is set close to the period of the wave, that is, the movable object or the like is set so as to be close to the resonance state. By configuring the natural period to be adjustable and adjusting the natural period of the movable object etc. according to the wave period, the motion of the movable object is amplified, and the wave energy conversion is more efficient. be able to.

For example, if the mass of a movable object is M, the gravitational acceleration is g, the density of water is P, and the horizontal area of the movable object is A, the natural period of the whole system is approximately 2πX (M / (pg A )) ^D · ⁵ , so that the movable object is constructed to hold water, and the pump is used to supply and drain water in the movable object to change the mass M of the movable object, etc. The natural period of a movable object or the like can be adjusted according to the period of the moving object. Industrial applicability

 ADVANTAGE OF THE INVENTION According to this invention, since a generator etc. are mounted on a movable object, there is no restriction on the installation location, and since it has a simple configuration that does not require a large floating body, the cost is low. In addition, the first wire mechanism provided with at least one pair of at least one pair symmetrically in front and back along the main traveling direction of the wave can extract energy such as rotational sway as the movable object moves up and down. This has the effect of efficiently converting wave energy.

According to the present invention, at least one pair of first wire mechanisms is further provided symmetrically in a front-rear direction along a direction perpendicular to the main traveling direction of the wave in accordance with the wave energy situation at the installation location. Alternatively, by providing at least one pair of second wire mechanisms that can extract the horizontal wave energy with high efficiency, the two wire mechanisms are generally symmetrical in the longitudinal direction along the main traveling direction of the waves. The effect of highly efficient conversion of wave energy in all directions ο §

Claims

The scope of the claims (1) a wire mechanism including a fixed object such as an anchor installed on the seabed, a weight, and a wire having one end connected to the fixed object and the other end connected to the weight; a generator; Power extraction means including a power extraction pulley engaged with the ear, and a reversible unit for constantly rotating the generator in the same direction regardless of the rotation direction of the power extraction pulley; A movable object type wave having a movable object equipped with power extraction means, wherein at least one pair of the wire mechanisms is provided substantially symmetrically in the longitudinal direction along the main traveling direction of the wave. Power energy converter.  (2) The movable object type wave force according to claim 1, wherein at least one pair of the wire mechanisms is provided in a direction perpendicular to the main traveling direction of the wave, and is generally symmetrical in the longitudinal direction. Energy conversion device.  (3) The fixed object is installed on the seabed far from the movable object, and the wire between the fixed object and the movable object is inclined. The movable object type wave energy conversion device as described in the above.  (4) A second fixed object such as an anchor installed on a seabed far from the movable object, an elastic elastic mechanism having one end fixed to the movable object, and one end connected to the second fixed object. A second wire mechanism including a second wire having the other end connected to the other end of the elastic mechanism, a power extraction pulley engaged with the second wire, and the power A second power extraction unit including a reversible unit that always rotates the generator in the same direction regardless of the rotation direction of the extraction pulley; and The movable object type wave energy conversion device according to claim 1 or 2, wherein at least one pair is provided substantially symmetrically in the front-back direction along the direction. (5) The second wire mechanism is moved in a direction perpendicular to the main traveling direction of the wave. The movable object type wave energy conversion device according to claim 4, wherein at least one pair is provided substantially symmetrically along a longitudinal direction.  (6) The movable wave energy conversion device according to any one of claims 1 to 5, wherein the movable object is a movable object having an object receiving wind.  (7) The movable object type wave energy conversion device according to any one of claims 1 to 6, wherein the movable object is a movable object having a plate receiving water resistance installed below. apparatus.