WO1995014168A1

WO1995014168A1 - Apparatus for conversion of energy of water surface wave

Info

Publication number: WO1995014168A1
Application number: PCT/JP1994/001927
Authority: WO
Inventors: Kesayoshi Hadano
Original assignee: Kesayoshi Hadano
Priority date: 1993-11-16
Filing date: 1994-11-15
Publication date: 1995-05-26
Also published as: AU8116994A

Abstract

An apparatus for conversion of energy of water surface waves, which is capable of converting vertical movements of water surface into a rotational movement which is not changed in a direction of rotation. The apparatus comprises a block (14) and two pulleys (15, 16) provided with a ratchet gear, said block and said pulleys being mounted on a rotating shaft (13). Passed around the block (14) is a length of rope (17), one end of which is attached to a float (19) and the other end of which is attached to a counterweight (20). The pulley (15) provided with a ratchet gear transmits only a counter clockwise rotation of rotational movements of the block (14) resulting from vertical movements of the float (19) to a torque transmitting rod (21) through a belt (25) and a pulley (23). The pulley (16) provided with a ratchet gear transmits only a clockwise rotation of rotational movements of the block (14) to a torque transmitting rod (22) through a belt (26) and a pulley (24).

Description

Specification

TECHNICAL FIELD The present invention relates to a water wave energy conversion device for converting sea surface water energy into rotational energy. Background art

2. Description of the Related Art Conventionally, various power generation devices for generating power using water surface wave energy have been proposed. In such a power generator, it is necessary to convert water wave energy into rotary energy in order to drive the generator.

As conversion devices for converting water surface wave energy into rotational energy, Japanese Patent Application Laid-Open Nos. 61-19071, 61-250213, and 60-201 are disclosed. As shown in Japanese Patent Application Publication No. 139887, there is an air turbine that rotates an air turbine by an air flow generated by the vertical movement of the water surface. However, such a conversion device requires a chamber air turbine for generating an air flow from the vertical movement of the water surface, and has a problem that the device becomes large-scale.

In addition, Japanese Patent Application Laid-Open No. Sho 61-2226582 discloses a converter that converts vertical fluctuation due to water level fluctuation of a buoy floating on the sea surface into rotational motion using a rack and a pinion. ing. However, there is a problem that the rotational motion obtained by this converter alternately changes the direction of rotation in response to vertical fluctuations due to fluctuations in the wave height of the buoy, which is inconvenient for use in power generation and the like. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and an object of the present invention is to provide a water wave energy conversion device capable of converting a vertical fluctuation of a water surface into a rotation motion in which a rotation direction does not change with a simple configuration. It is in. Disclosure of the invention

The water wave energy conversion device of the present invention converts the vertical motion of the water surface into a reciprocating rotational motion. Kinetic energy converting means for extracting and outputting a rotational movement in one of the reciprocating rotational movements outputted from the kinetic energy converting means, and outputting the kinetic energy conversion; And a second rotational movement extracting means for extracting and outputting the rotational movement in the other rotational direction of the reciprocating rotational movement output from the means.

In this water surface wave energy conversion device, the vertical motion of the water surface is converted into a rotational motion by the kinetic energy converting means and output, and further, the rotational motion output from the kinetic energy converting means is output by the first rotary motion extracting means. The rotational motion in one rotational direction is extracted and output. Further, the second rotational movement extracting means extracts and outputs the rotational movement in the other rotational direction of the rotational movements output from the kinetic energy converting means. Thus, the vertical fluctuation of the water surface can be converted into a rotational motion in which the rotational direction does not change. Either one of the rotational motions may be used individually, or the other may be combined after the other rotational motion is turned in the opposite direction.

In addition, the surface wave energy conversion device of the present invention includes a pulley, a rope wound around the pulley, a float attached to one end of the rope and floating on the water surface, and attached to the other end of the rope. A counter-weight unit lighter in weight than the float, a first output shaft for outputting rotational energy in one direction, a second output shaft for outputting rotational energy in the other direction, A first ratchet mechanism for transmitting, to the first output shaft, only a rotational movement in one rotational direction of the pulley in accordance with the vertical movement of the float; and A second ratchet mechanism that transmits only the rotational movement in the other rotational direction of the rotational movement of the pulley to the second output shaft may be provided.

In this water wave energy conversion device, the float moves up and down as the water surface moves up and down, and the pulley rotates while alternately changing the rotation direction. The rotation of one of the pulleys in the rotation direction is transmitted to the first output shaft by the first ratchet mechanism, and the rotation of the other of the pulleys in the rotation direction is the rotation of the pulley in the other direction. The rotation is transmitted to the second output shaft by the second ratchet mechanism, and the vertical movement of the water surface can be converted into a rotation movement in which the rotation direction does not change with a simple configuration. Furthermore, the surface wave energy conversion device of the present invention includes a plurality of pulleys, a plurality of ropes wound around each pulley, and a plurality of floats attached to one end of each rope and floating on the water surface, respectively. Multiple counterweights attached to the other end of each rope that are lighter than each float, a first output shaft to output rotational energy in one direction, and rotational energy in the other direction And a plurality of first ratchets for transmitting to the first output shaft only the rotational movement in one rotational direction of the rotational movement of each pulley associated with the vertical movement of each float. And a plurality of second ratchet mechanisms for transmitting to the second output shaft only the rotational movement in the other rotational direction of the rotational movement of each pulley associated with the vertical movement of each float. Be prepared Can.

In this water wave energy conversion device, each of the plurality of floats moves up and down with the up and down movement of the water surface, and accordingly, the plurality of pulleys rotate while alternately changing the rotation direction. Rotational movement in one rotational direction of each pulley is transmitted to one output shaft (first output shaft) by each first ratchet mechanism, and the rotation of each pulley is The rotational motion in the other rotational direction is transmitted to one output shaft (second output shaft) by each second ratchet mechanism. In the water surface wave energy conversion device of the present invention, in addition to the effects of the above-described invention, it is possible to effectively obtain energy from arbitrary water surface fluctuations, particularly waves having a short wavelength.

In the water surface wave energy conversion device according to the present invention, the first surface of the ratchet mechanism and the first output shaft and the second surface of the ratchet mechanism and the second output shaft each include the second output shaft. It is preferable to provide a shock absorber for alleviating the impact of the torque load on the first and second ratchet mechanisms and accumulating the strain energy. As a result, the impact of the torque load on the first ratchet mechanism or the second ratchet mechanism can be relieved, the strain energy can be stored, and the energy conversion efficiency is improved.

In the water wave energy conversion device of the present invention, the water wave energy conversion device described above further comprises: synthesizing the rotation energy output from the first output shaft and the rotation energy output from the second output shaft. It is possible to adopt a configuration including a synthesizing means for obtaining rotational energy in two rotational directions. In this water surface wave energy conversion device, the combining means combines the rotational energy output from the first output shaft and the rotational energy output from the second output shaft to obtain rotational energy in one rotational direction. . BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view showing the configuration of a water wave energy conversion device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing a part of the pulley with a ratchet gear, FIG. 4 is a cross-sectional view showing another operation state of a part of the pulley with a ratchet gear in FIG. 3, and FIG. 5 is a diagram showing a plurality of components shown in FIG. FIG. 6 is a cross-sectional view showing a structure of a mounting portion of a shock absorber, FIG. 7 is a cross-sectional view showing a mounting structure of a mainspring spring, and FIG. 8 is a spiral spring. FIG. 9 is a front view showing a gear for aligning torques in opposite directions transmitted by the two torque transmission rods in FIG. 1 or FIG. 5 in one direction, and FIG. FIG. 11 is a front view showing a configuration of a water surface wave energy conversion device according to a second embodiment of the present invention, and FIG. Fig. 10 is a cross-sectional view taken along line B-B, Fig. 12 is a cross-sectional view taken along line C-C in Fig. 10, and Fig. 13 is a configuration in which a plurality of components shown in Fig. 10 are connected. It is a perspective view showing a water wave energy conversion device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration of a water wave energy conversion device according to a first embodiment of the present invention, and FIG. 2 shows a cross-sectional configuration along line AA of FIG. The surface wave energy conversion device of the present embodiment is provided with a pair of support plates 11 and 11 arranged facing each other, and bearings 12 and 12 are mounted on these support plates 11 and 11. The rotating shaft 13 is rotatably mounted via the. In FIG. 1, one support plate 11 is omitted. A pulley 14, a pulley 15 with a ratchet gear as a first ratchet mechanism, and a pulley 16 with a ratchet gear as a second ratchet mechanism are attached to the rotating shaft 13. Have been. The pulley 14 is wound around a mouthpiece 17 such as a seawater-resistant wire rope. One end of this rope 17 floats on the water surface 18 Float 19 is attached. Further, the other end of the rope 1 7 _Q which Kauntauwei Doo 2 0 lighter than the float 1 9 is attached

Here, the weight, specific gravity, and volume of the float 19 are S i, V, and the weight, specific gravity, and volume of the counter weight ₂₀ are W ₂ , S _z , V ₂ , and the unit volume of water, respectively. When is assumed to be w, the equilibrium at rest is given by

_{S 2 · · V 2 = (} S i -) · w V j - (1)

By transforming the above equation and calculating S i, the following equation is obtained.

Therefore, the specific gravity (that is, the material) of the float 19 is set based on the specific gravity S ₂ of the counterweight ₂₀ and the volume V _2, which are a draft rate, and the volume ratio V ₂ / V taking into account the shape and balance. i can be obtained by the above equation (2). In order to suppress the horizontal movement of the float 19 due to waves and currents on the sea surface, it is advantageous to increase the tension of the mouthpiece 17. Based on this fact, it is possible to obtain the float from the above equations (1) and (2). The specifications of 19 and the counterweight 20 may be determined.

Returning to FIG. 1, the explanation will be continued. The support plates 11 and 11 are respectively connected to a torque transmitting rod 21 as a first output shaft and a second output shaft through bearings (not shown). The torque transmission rods 22 are each rotatably mounted. A pulley 23 is attached to the torque transmission rod 21, and a pulley 24 is attached to the torque transmission rod 22. A belt 25 extends between the pulley 15 with the ratchet gear and the pulley 23, and a belt 26 extends between the pulley 16 with the ratchet gear and the pulley 24. Have been.

The pulley 15 with the ratchet gear 15 transmits only one of the rotational movements of the pulley 14 in both directions, for example, the counterclockwise rotational movement, to the torque transmitting rod 21 via the belt 25 and the pulley 23. To communicate. Similarly, the pulley 16 with the ratchet gear transmits the other rotational direction of the pulley 14 in both directions, for example, only the rotational direction in the clockwise direction, to the torque transmission via the belt 26 and the pulley 24. The bar 22 is to communicate. The torque transmission rod 21 and the torque transmission rod 22 are connected to a device that uses the obtained rotational energy, for example, a power generator (not shown). FIGS. 3 and 4 show a pulley 15 with a one-speed latch as an example of the pulley 15 with a ratchet gear. The pulley 16 with a ratchet gear has a symmetrical structure to those shown in FIGS. 3 and 4. The pulley 15 with a ratchet gear shown in these figures has a plurality of roller storage portions 31 on the inner peripheral side. In each roller storage section 31, a roller 32 and a spring 3 for urging the roller 32 toward the cam surface 33 are stored. In this pulley 15 with a ratchet gear, as shown in FIG. 3, when the rotating shaft 13 rotates counterclockwise, the spring 34 causes the rollers 32 to contact the cam surface 33. The pulley 15 with the ratchet gear rotates by the wedge action between the cam surface 33 and the rotating shaft 13. On the other hand, as shown in FIG. 4, when the rotating shaft 13 rotates clockwise, the rollers 32 move away from the cam surface 33, and the pulley 15 with the ratchet gear does not rotate. The pulley 16 with a ratchet gear does not rotate when the rotating shaft 13 rotates counterclockwise, but rotates when the rotating shaft 13 rotates clockwise.

Instead of pulleys 15 and 16 with ratchet gears, pulleys without ratchet gears may be provided, and pulleys with ratchet gears may be provided instead of pulleys 23 and 24.

Next, the operation of the water surface wave energy converter will be described.

In this energy conversion device, when the water surface 18 moves up and down, the float 19 moves up and down, whereby the pulleys 14 rotate while alternately changing the rotation direction. Here, when the water level rises, the buoyancy acting on the float 19 increases, and the [weight of the counterweight 20-(weight of the float 19-buoyancy acting on the float 19)] is represented by the pulley 14 in the figure. When the water level falls, the buoyancy acting on the float 19 decreases, and the buoyancy acting on the float 19 decreases ([weight of the float 19-buoyancy acting on the float 19). Weight] creates a torque that rotates the pulley 14 counterclockwise in the figure.

Of the rotational movement of the pulley 14, the rotational movement in the counterclockwise direction is transmitted to the torque transmission rod 21 via a pulley 15 with a ratchet gear, a belt 25 and a pulley 23. On the other hand, the clockwise rotating motion is the pulley with ratchet gear 16 and the belt 2 The rotation of the pulley 14 in each unit 40 in the other rotational direction can be transmitted to one torque transmission rod 22. Therefore, with this energy conversion device, it is possible to effectively obtain energy from arbitrary water level fluctuations, especially from short wavelength waves.

Although FIG. 5 shows an example in which the unit 40 is arranged in one row, the unit 40 may be arranged in a plurality of rows, and the energy obtained by the unit 40 arranged in these rows may be used. You may make it synthesize | combine.

As described above, the water surface wave energy conversion device according to the first embodiment has a simple structure and is easy to install. In addition, the water wave energy can be converted into rotational energy as long as there are few restrictions on the installation location and the water surface fluctuation is not extremely short. Further, according to this embodiment, since the horizontal dimensions of the individual floats 19 can be reduced, the level of the water surface is leveled in the horizontal direction, so that the energy conversion efficiency is greatly reduced. You. That is, even in the case of a wave having a relatively short wavelength, there is a limit, and energy can be efficiently extracted.

According to the present embodiment, a large torque can be obtained by increasing the length of the arm of the pulley 14, that is, by setting the radius of the pulley 14 to be large. As described above, when the torque at the energy input source is large, the power of the counterweight 20 can be doubled and extracted. This multiplication factor is determined by considering the ratio of the torque required at the final stage to the torque at the input source, and taking into account the ability of the float 19 to follow the water level fluctuation. Further, in the water surface wave energy conversion device of the present embodiment, the ratchet gear, which is a fatigue component, can be relatively easily replaced, so that it can be used for a long time.

FIGS. 10 to 13 show the configuration of a water wave energy conversion device according to a second embodiment of the present invention. Here, FIG. 10 is a front view of the energy conversion device, FIG. 11 is a cross-sectional view taken along the line BB of FIG. 10, and FIG. 12 is a cross-sectional view taken along the line CC of FIG. Is represented. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the first embodiment, as shown in FIG. 5, one shock absorber 41 is connected to a plurality of units. Although it is configured to be installed between 40 and a power generation device (not shown), in the present embodiment, the configuration is such that the shock absorber 41 is installed for each unit.

In this embodiment, idler pulleys 113 and 114 are attached to both sides of the pulley 14 with respect to the support plates 11 and 11, respectively. One end of the seawater-resistant rope 17 wrapped around the pulley 14 is suspended on the water surface 18 via one idler pulley 113, and a float 19 floating on the water surface 18 is provided at the tip. Installed. Also, the other end of the rope 17 is suspended from the other idler pulley 1 14 to the water surface 18, and a counterweight 115 having a smaller weight in the water than the float 19 is attached to the tip of the other end. ing. In the present embodiment, the counterweight 115 is set to move up and down in water in order to prevent the counterweight 115 itself from swinging in strong winds. Also, unlike the first embodiment, the shape of the counterweight 115 has a streamline shape that is long in the vertical direction, and reduces the fluid resistance during the vertical movement.

In addition, a rotating shaft 1 16 is provided on the support plates 1 1 and 1 1 at a position below the torque transmission rod 21, and pulleys 1 1 8 and 1 1 9 are coaxially mounted on the rotating shaft 1 16. Installed. A belt 25 is stretched between a pulley 1 18 and a pulley 15 with a ratchet gear. Further, a belt 111 is stretched between the pulleys 119 and 23. Further, the support plates 11 and 11 are provided with a rotating shaft 120 below the torque transmitting rod 22. The pulleys 1211 and 122 are coaxially mounted on the rotating shaft 120. It is attached. A belt 26 is stretched between the pulley 12 1 and the pulley 15 with a ratchet gear. A belt 1 1 2 is stretched between the pulleys 1 2 and 2.

In the present embodiment, as shown in FIG. 12, a shock absorber 41 is attached to the back surface of the pulley 119. The shock absorber 41 has the same structure as that of the first embodiment except that the torque transmission rod 21 is changed in the rotating shaft 1 16 when the water level is switched between rising and falling in normal times. In addition to reducing the impact of torque loads on the pulleys with ratchet gears 15 and 16 that occur when the water level changes suddenly under severe wave conditions such as breaking waves, it has the function of accumulating strain energy. Although not shown, a shock absorber 41 is similarly attached to the pulleys 122. The rotation of the pulley 14 in each unit 40 in the other rotational direction can be transmitted to one torque transmission rod 22. Therefore, with this energy conversion device, it is possible to effectively obtain energy from arbitrary water level fluctuations, especially from short wavelength waves.

Although FIG. 5 shows an example in which the units 40 are arranged in one row, the units 40 may be arranged in a plurality of rows, and the energy obtained by the units 40 arranged in these rows may be used. You may make it synthesize | combine.

As described above, the water surface wave energy conversion device according to the first embodiment has a simple structure and is easy to install. In addition, the water wave energy can be converted into rotational energy as long as there are few restrictions on the installation location and the water surface fluctuation is not extremely short. Further, according to this embodiment, since the horizontal dimensions of the individual floats 19 can be reduced, the level of the water surface is leveled in the horizontal direction, so that the energy conversion efficiency is greatly reduced. You. In other words, even in the case of a wave having a relatively short wavelength, there is a limit, and energy can be extracted efficiently.

According to the present embodiment, a large torque can be obtained by increasing the length of the arm of the pulley 14, that is, by increasing the radius−of the pulley 14. As described above, when the torque at the energy input source is large, the power of the counterweight 20 can be doubled and extracted. This multiplication factor is determined by considering the ratio of the torque required at the final stage to the torque at the input source, and taking into account the ability of the float 19 to follow the water level fluctuation. Further, in the water wave energy conversion device of the present embodiment, the replacement of the ratchet gear, which is a fatigue component, is relatively easy, and thus the device can be used for a long time.

FIGS. 10 to 13 show the configuration of a water wave energy conversion device according to a second embodiment of the present invention. Here, FIG. 10 is a front view of the energy conversion device, FIG. 11 is a cross-sectional view taken along line BB of FIG. 10, and FIG. 12 is a cross-sectional view taken along line C-C of FIG. Is represented. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the present embodiment, idler pulleys 113 and 114 are attached to both sides of the pulley 14 with respect to the support plates 11 and 11, respectively. One end of the seawater-resistant rope 17 wound around the pulley 14 is suspended on the water surface 18 via one idler pulley 113, and a float 19 floating on the water surface 18 at the tip thereof. Is attached. Also, the other end of the rope 17 is suspended from the other idler pulley 1 14 to the water surface 18, and a counterweight 115 having a smaller weight in the water than the float 19 is attached to the tip of the other end. ing. In the present embodiment, the counterweight 115 is set to move up and down in water in order to prevent the counterweight 115 itself from swaying in a strong wind. Also, unlike the first embodiment, the shape of the counterweight 115 has a streamline shape that is long in the vertical direction, and reduces the fluid resistance during the vertical movement.

In addition, a rotating shaft 1 16 is provided on the support plates 1 1 and 1 1 below the torque transmission rod 21, and pulleys 1 1 8 and 1 1 9 are coaxially mounted on the rotating shaft 1 16. Installed. A belt 25 is stretched between a pulley 1 18 and a pulley 15 with a ratchet gear. Further, a belt 111 is stretched between the pulleys 119 and 23. Further, the support plates 11 and 11 are provided with a rotating shaft 120 below the torque transmitting rod 22. The pulleys 1211 and 122 are coaxially mounted on the rotating shaft 120. It is attached. A belt 26 is stretched between the pulley 12 1 and the pulley 15 with a ratchet gear. Further, a belt 1 1 2 is stretched between the pulleys 1 2 and 2.

In the present embodiment, as shown in FIG. 12, a shock absorber 41 is attached to the back surface of the pulley 119. The shock absorber 41 has the same structure as that of the first embodiment except that the torque transmission rod 21 is changed in the rotating shaft 1 16 when the water level is switched between rising and falling in normal times. In addition to reducing the impact of torque load on the pulleys with ratchet gears 15 and 16 that occur when the water level changes suddenly under severe wave conditions such as breaking waves, it has the function of accumulating strain energy. Although not shown, a shock absorber 41 is similarly attached to the pulleys 122. Here, considering the balance at rest, the balance formula in the present embodiment is as follows.

(S 2 — 1) · w · V ₂ = (S i-) · w Vj… (3)

By transforming the above equation and finding, the following equation is obtained.

S j = a + (S 2-1) V ₂ / Vi-(4)

Also in the present embodiment, the specific gravity (that is, the material) S フロー of the float 19 is set as a condition of the draft rate α, the specific gravity of the counterweight 20 ″., And the volume V ₂ , and the shape and balance are taken into consideration. The volume V ₂ / Vi can be obtained by the above equation (4). In order to suppress the horizontal movement of the float 19 caused by waves and currents on the sea surface, it is advantageous to increase the tension of the rope 17. Based on this fact, the equations (3) and (4) give What is necessary is just to determine the specifications of 19 and the counterweight 1 15.

In the water wave energy conversion device of the present embodiment, when the water surface 18 moves up and down, the float 19 moves up and down, whereby the pulleys 14 rotate while alternately changing the rotation direction. Here, when the water level rises, the buoyancy acting on the float 19 increases,

[Weight of counterweight 115 (weight in water)-(weight of float 19-buoyancy acting on float 19)] Creates a tonnolek that rotates pulley 14 in the clockwise direction in the figure and lowers the water level. At times, the buoyancy acting on the float 19 decreases,

[(Weight of float 19-buoyancy acting on float 19)-counterweight 1 15 weight (underwater weight)] creates a torque that rotates pulley 14 counterclockwise in the figure.

Of the rotation of the pulley 14, the rotation in the counterclockwise direction is transmitted to the rotation shaft 116 via the pulley 15 with the ratchet gear, the belt 25 and the pulley 118. The rotational motion of the rotating shaft 1 16 is transmitted to the torque transmitting rod 21 via the pulley 119, the belt 111 and the pulley 23. On the other hand, the rotational movement in the clockwise direction is transmitted to the rotary shaft 120 via the pulley 16 with a ratchet gear, the belt 26 and the bully 121. The rotating motion of the rotating shaft 120 is transmitted to the torque transmitting rod 22 via the burry 122, the belt 112 and the pulley 24. Therefore, also in this embodiment, the torque transmission rod 21 and the torque transmission rod 22 rotate in directions opposite to each other. Each rotation direction is always constant. In this way, the vertical movement of the water surface 18 is converted into a rotational motion in which the rotational direction does not change.

The shock absorber 41 attached to the back of each of the pulleys 1 19, 1 2 2 has a rotating shaft 1 16 and a rotating shaft due to a sudden change in the water level under severe wave conditions such as rising or falling water and breaking waves. When the shaft 120 rotates, the mainspring spring 46 is tightened and then gradually unwound, thereby relieving the impact of torque load on the pulleys with ratchet gears 15 and 16 and accumulating strain energy. .

FIG. 13 illustrates an example in which a plurality of the energy conversion devices illustrated in FIG. 10 are connected. In this example, the energy conversion device shown in FIG. 10 is one unit 130, and a plurality of units 130 are arranged along the axial direction of the torque transmission rods 21 and 22. The torque transmission rods 21 and 22 of the unit 130 are connected to each other by a universal joint (not shown). The support plate 11 of each unit 130 supports each component so that the torque transmission rods 21 and 22 of each unit 130 are arranged substantially in a straight line. Eventually, they are connected and fixed to each other as in the first embodiment.

In the present embodiment, unlike the first embodiment, a buffer device 41 is provided for each unit 130, and with such a configuration, each buffer device 41 is provided. Thus, unlike the first embodiment, the sum of the torque loads from all the units is not always applied. Therefore, the function as a buffer element against the fluctuation of the torque input from each unit 130 can be sufficiently exhibited.

It should be noted that the present invention is not limited to the above embodiment, but can be variously modified. For example, in the above-described embodiment, the shock absorber 41 using the mainspring spring 46 has been described. However, a torque limiter may be used as the shock absorber, and a torque larger than a predetermined value may not be transmitted. . In the above embodiment, the belts 25 and 26 are used for torque transmission. However, a chain is used instead, and a chain gear is used instead of the pulleys 15, 16, 23, and 24. Is also good. INDUSTRIAL APPLICABILITY The energy conversion device may be installed close to the shore, or may be installed relatively far from the shore. In the case of installation near the shore, for example, as in the case of building a bridge, several concrete piers (piers) are arranged, and a girder (or perforated plate) is placed on these, and a support base is made. The energy conversion device of the above embodiment is set on the support base. In actuality, it can be installed as ancillary facilities under the bridge such as Baby Ridge. This method can also be used when natural terrain such as rocks exposed on the sea surface can be used. On the other hand, in the case of installation away from the shore, for example, on a large floating body such as a waste ship, a plurality of support bases are projected above the sea surface, for example, in a double-sided form, and a grid girder support The energy conversion device of the above embodiment is mounted on the support base. In addition, it is preferable that the weight of the float 19 be lowered to the seabed and that the lower end of the float 19 be opened with a chain in order to prevent a large movement in the lateral direction. .

Next, a specific method of using the energy conversion device will be described.

Normally, at sea, the wave energy at a particular location varies greatly over time. As a method of smoothing this, it is conceivable to use the energy conversion device of the present invention together with ocean temperature difference power generation. In other words, the energy obtained by wave power generation is once converted into thermal energy and used as a high-temperature source for ocean thermal energy conversion. In addition, it may be used together with pumped storage power generation. In other words, the energy obtained by the wave power can be used for pumping water from the lower pond to the upper pond, and the energy for general supply can be the energy generated when descending from the upper pond to the lower pond.

Further, the energy conversion device of the present embodiment can be used as an energy source for primary conversion for wave power generation and for water exchange between a closed water area and the open sea. Also, in this energy conversion device, when the incident wave passes through an energy conversion device having a plurality of rows of float groups, it loses the energy of water level fluctuation. Therefore, this energy converter can be expected to have a wave-breaking effect, that is, a function as a breakwater. Also, unlike ordinary breakwaters, this device does not affect tidal seawater exchange, The bottom water does not stay in the bay and does not change the seafloor topography as in the case of building a normal breakwater.

Claims

The scope of the claims

1. kinetic energy conversion means for converting the vertical movement of the water surface into a reciprocating rotational movement and outputting the result;

First rotational motion extracting means for extracting and outputting a rotational motion in one of the reciprocating rotational motions output from the kinetic energy converting means,

Second rotational movement extracting means for extracting and outputting the rotational movement in the other rotational direction of the reciprocating rotational movement output from the kinetic energy converting means;

A water wave energy conversion device comprising:

2. Pulley and

A rope wrapped around this pulley,

A float attached to one end of the rope and floating on the water surface, and a counterweight attached to the other end of the rope, which is lighter than the float,

A first output shaft for outputting rotational energy in one direction;

A second output shaft for outputting rotational energy in the other direction;

A first ratchet mechanism for transmitting, to the first output shaft, only the rotational movement in one rotational direction of the rotational movement of the pulley associated with the vertical movement of the float;

A second ratchet mechanism for transmitting only a rotational movement in the other rotational direction of the pulley rotational movement accompanying the vertical movement of the float to the second output shaft;

A water wave energy conversion device comprising:

3. With multiple pulleys,

Multiple ropes wrapped around each pulley,

A plurality of floats attached to one end of each rope and floating on the water surface, and a plurality of counterweights each attached to the other end of each rope and weighing less than each float;

A first output shaft for outputting rotational energy in one direction;

A second output shaft for outputting rotational energy in the other direction;

One of the rotations of each pulley accompanying the up and down movement of each float And a plurality of first ratchet mechanisms for transmitting only the rotational movement of the respective pulleys to the first output shaft. A water wave energy conversion device, comprising: a plurality of second ratchet mechanisms for transmitting to the second output shaft.

4. Between the first ratchet mechanism and the first output shaft and between the second ratchet mechanism and the second output shaft, the first ratchet mechanism and the second output shaft, respectively. 4. The water wave energy conversion device according to claim 2, wherein a shock absorber is provided for relieving an impact of a torque load on the second ratchet mechanism and accumulating strain energy.

5. Further provided is a synthesizing means for synthesizing the rotational energy output from the first output shaft and the rotational energy output from the second output shaft into rotational energy in one rotational direction. The water surface wave energy conversion device according to any one of claims 2 to 4, characterized in that: