JP2003206845A - Wave force energy converter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wave force energy converter having a simple and efficient conversion mechanism and the function of considerably mitigating the wave force in abnormal waves, and reducing the life cycle cost until the transfer or withdrawal of the converter. <P>SOLUTION: A floating type pressure-bearing plate 3 having a hollow float 7 movable in the vertical direction is disposed on a guide frame 11. The float 7 is moved in the vertical direction according to the wave condition, water is poured in the float 7, and the wave force on the floating type pressure-bearing plate 3 is adjusted. The guide frame 11 easily performs the transfer or withdrawal by a crane or the like via a suspension tool 5 provided on an upper end thereof. The floating type pressure-bearing plate 3 performs the oscillating motion with a passive shaft 17 as the axis, and the passive shaft 17 performs the reciprocal rotational motion. A revolving double ratchet mechanism 15 transmits the reciprocal rotational motion of the passive shaft 17 to a power- generating shaft 19 as the rotational motion in one direction. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave energy conversion device.

[0002]

2. Description of the Related Art Conventionally, a wave energy converter is a movable object type that is swayed by a wave, an oscillating water column type that compresses air by utilizing the up and down motion of the wave, and a turbine that rotates a turbine. It is classified into a pressure-receiving surface type, a horizontal wave of seawater caused by wave deformation and an overtopping type that uses overtopping waves from levees, and a setup type that obtains an increase in average water level due to wave-breaking works.

[0003]

However, the movable object type and the vibrating water column type structurally have a problem in strength during abnormal waves. In the moored floating structure type, a large tension (impact load) acts on the mooring device during abnormal waves, which makes it difficult to protect the mooring system from wave forces and increases maintenance costs. In addition, the setup type requires a large-scale construction for the converging dike and the reservoir. Construction and maintenance costs at sea are high for structures that incorporate a converter into a rigid caisson breakwater on an offshore rubble mound.

The incident wave energy is converged in a V-shaped seabed to increase the wave overtopping amount and run-up height, and seawater is stored at a position several meters higher than the water surface on the land side. As for the method of using, there is little suitable land for Japan, which requires a huge area of basin and has large land restrictions in the coastal area.

In addition, both technologies have irregular wave fluctuations,
There are problems in conversion efficiency against tidal fluctuations and operating rate throughout the year. For example, in the vibrating water column type, since compressible air intervenes in the energy transmission process, air leakage and energy loss to heat and sound are large. In addition, it is difficult to control small waves and high waves, and the operating rate is low throughout the year. Furthermore, considering the future life cycle cost of these wave energy converters, which is assumed even for repair, dismantling, and removal, it is still difficult to spread practically due to the constraint condition of being offshore.

The present invention has been made in view of such problems, and an object thereof is to have a simple and efficient conversion mechanism and a function of significantly reducing the wave force received during an abnormal wave, An object of the present invention is to provide a wave energy conversion device capable of reducing the life cycle cost of relocation, dismantling, and removal.

[0007]

SUMMARY OF THE INVENTION A first invention for achieving the above-mentioned object is to provide a pressure receiving plate which floats in water and oscillates by wave force, and a oscillating motion of the pressure receiving plate. And a conversion means for converting the rotational motion of the wave energy into a wave energy conversion device.

The pressure receiving plate is provided with a movable floating body inside, for example, and oscillates by wave force. Here, the swinging motion means a pendulum-like motion with one side of the pressure receiving plate as an axis. As the conversion means, for example, a revolving double ratchet mechanism having a passive shaft and a power generation shaft, or a sliding double ratchet mechanism is used.

When the revolving double ratchet mechanism is used as the converting means, the pressure receiving plate is attached to, for example, the passive shaft of the converting means installed on the seabed or on the sea surface. At this time, the pressure receiving plate performs a swinging motion around the passive shaft. Alternatively, one end of the pressure receiving plate is hinged to the seabed side, and the connecting means is provided between the other end and the converting means. At this time, the pressure receiving plate performs a swinging motion around the hinge connection. The connecting means is composed of, for example, a rotating mechanism provided on the passive shaft on the converting means side and a chain or crank provided between the other end of the pressure receiving plate and the rotating mechanism.

When the sliding double ratchet mechanism is used as the converting means, one end of the pressure receiving plate is hinged to the seabed side, and the connecting means is provided between the other end and the converting means. The pressure receiving plate performs a swinging motion around the hinge connection.

According to the first aspect of the invention, the pressure receiving plate absorbs the energy of the waves by floating in water and oscillating by the wave force. The converting means converts the swinging motion of the pressure receiving plate into the rotary motion of the power generation shaft.

A second invention is characterized by comprising a pressure receiving plate which floats in water and reciprocates by wave force, and a conversion means which converts the reciprocating motion of the pressure receiving plate into a rotary motion of a power generation shaft. It is a wave energy converter.

The pressure receiving plate is provided with, for example, a movable floating body inside, and reciprocates by wave force. The conversion means is
For example, a revolving double ratchet mechanism having a power generation shaft. The pressure receiving plate is provided with, for example, a pair of arms, and the arms are provided with a ball screw via a connecting member. The screw is connected to a revolving double ratchet mechanism.

According to the second aspect of the invention, the pressure receiving plate absorbs the energy of the wave by reciprocating by the wave force while floating in the water. The conversion means converts the reciprocating motion of the pressure receiving plate into the rotary motion of the power generation shaft.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an elevation sectional view of the wave energy converter 1, FIG. 2 is a plan sectional view of the floating pressure receiving plate 3, and FIG. 3 is an elevation view of the plurality of floating pressure receiving plates 3. 1 is a sectional view taken along line X1-X1 of FIG.
FIG. 2 is a sectional view taken along line X2-X2 of the floating type pressure receiving plate 3 of FIG. FIG. 3 is an elevation view seen from the direction of arrow X3 in FIG. As shown in FIG. 1 and FIG. 3, the wave energy conversion device 1 includes a floating pressure receiving plate 3, a revolving double ratchet mechanism 15, a base portion 24, and the like.

Revolving double ratchet mechanism 15
Is installed, for example, on the seabed 21 off the sea such as the existing breakwater 25. The floating type pressure receiving plate 3 is installed above a base portion 24 formed on the seabed 21. The lower edge of the floating type pressure receiving plate 3 has a passive shaft 1 of the revolving double ratchet mechanism 15.
It is joined to 7. Base portion 24 formed on the seabed 21
Has a shape like a sled so that the subsidence to the seabed 21 can be alleviated even when the rocking phenomenon or the like occurs in the base portion 24 due to the waves. The power generation shaft 19 of the revolving double ratchet mechanism 15 is connected to a generator (not shown).

As shown in FIGS. 1 to 3, the floating body pressure receiving plate 3 comprises a lifting jig 5, a floating body 7, a horizontal partition wall 9, a guide frame 11 and the like. The guide frame 11 is
It is a rectangular frame, and the lower end edge is joined to the passive shaft 17. The guide frame 11 is formed of a member such as H steel. A buoyant body 13 is provided near the upper end of the vertical member of the guide frame 11. The guide frame 11 is moved / removed by a crane or the like via the hanging jig 5 provided on the upper edge.

Inside the guide frame 11, a hollow box-shaped floating body 7 is installed. The floating body 7 is movable in the vertical direction of the guide frame 11 depending on the wave conditions.
At the time of high waves, the floating body 7 is moved below the water surface 23 to be submerged, and the horizontal force, the lift force, and the overturning moment due to the waves are reduced. Floating body 7, when subsidence or sliding occurs due to high waves,
The position can be adjusted relatively easily with a crane.

Inside the floating body 7, horizontal partition walls 9 having openings 8 are provided in multiple stages. The floating body 7 is filled with water through the opening of the horizontal partition wall 9. As a result, the specific gravity, draft, restoring force, and natural period of the floating type pressure receiving plate 3 are changed,
The wave energy conversion device 1 can be operated for a small wave height or a short cycle wave. By providing the floating type pressure receiving plate 3 with a mechanism for sensing the predominant period of waves, water can be poured into the inside of the floating body 7 automatically or remotely according to the state of the waves. In addition, the opening 8 is formed by the horizontal partition 9
To allow the movement of water in the vertical direction.
The shape and quantity are not limited to those shown in FIGS. 1 and 2.

When the floating body pressure receiving plate 3 is installed in front of the existing breakwater 25 having a high reflectance, a multiple reflection system is formed between the existing breakwater 25 and the floating pressure receiving plate 3, and the floating body pressure receiving plate 3 is formed. May interfere with the smooth swinging motion of the.
In this case, as shown in FIGS. 1 and 2, the existing breakwater 2
The cushioning material 10 is attached to the surface of the floating body 7 on the fifth side. For the cushioning material, for example, artificial fibers having voids are used. The cushioning material 10 reduces the reflectance of the floating body 7 and prevents the formation of multiple reflection systems.

The floating type pressure receiving plate 3 has a thickness 4 in the wave traveling direction smaller than that of an ordinary floating structure, and an upward shocking force such as a snap load due to a buoyant force change when the wave passes. It is possible to suppress the generation of various tensions.

FIG. 4 is a schematic view of the revolving double ratchet mechanism 15. The revolving double ratchet 15 is composed of a passive shaft 17 having a rotation mechanism 27 with a ratchet and a rotation mechanism 29 with a ratchet, a power generation shaft 19 having a rotation mechanism 31 and a rotation mechanism 33, and a rotation shaft 36 having a rotation direction conversion mechanism 35. It The revolving double ratchet structure 15 includes, for example, reinforced plastic,
Use a seawater-resistant material such as titanium alloy.

The rotation mechanism 27 with a ratchet is the rotation mechanism 3
It is in contact with 1. The rotation mechanism with ratchet 29 and the rotation mechanism 33 are not in direct contact with each other, but the rotation direction conversion mechanism 35 is provided between them.
Through. The rotation mechanism with ratchet 27 and the rotation mechanism 31, the rotation mechanism with ratchet 29, the rotation direction conversion mechanism 35, and the rotation mechanism 33 have a structure capable of rotating in conjunction with each other, for example, using gears.

The rotating mechanism 27 with a ratchet is used for the passive shaft 1
7 has a ratchet mechanism that transmits only the rotational movement in the direction of arrow B to the ratchet rotating mechanism 27. The ratchet rotating mechanism 29 only transmits the rotational movement of the passive shaft 17 in the direction of arrow D to the ratchet rotating mechanism 29. It has a ratchet mechanism for transmitting to.

Rotating mechanism 27 with ratchet and rotating mechanism 3
1 is the rotation of the passive shaft 17 in the direction of arrow B
Is transmitted as a rotation in the direction of arrow C. The ratchet-equipped rotation mechanism 29, the rotation direction conversion mechanism 35, and the rotation mechanism 33 convert the rotation of the passive shaft 17 in the direction of arrow D into the rotation of the rotation shaft 36 in the direction of arrow E, and then rotate the power generation shaft 19 in the direction of arrow F. Transmitted as the rotation of.

Next, the operation of the wave energy converter 1 will be described. The floating type pressure receiving plate 3 of the wave energy conversion device 1 senses the predominant period of the waves generated on the water surface 23. Then, according to the wave state, water is poured into the inside of the floating body 7 and the position of the floating body 7 is adjusted so that the floating type pressure receiving plate 3 resonates with the wave and the vibration becomes large. Water injection into the floating body 7 is performed by automatic water injection or remote operation.

As shown in FIG. 1, when a wave is generated on the water surface 23, the floating pressure receiving plate 3 has an arrow A with the passive shaft 17 as an axis.
Performs rocking motion in the direction of. Here, the swinging motion refers to FIG.
As shown in FIG. 5, it refers to a pendulum-like motion about the passive shaft 17. At this time, the passive shaft 17 joined to the floating pressure receiving plate 3 rotates alternately in the directions of arrows B and D as shown in FIG.

As described above, the ratchet mechanism of the ratchet rotating mechanism 27 operates when the passive shaft 17 rotates in the direction of arrow B, and the ratchet rotating mechanism 27 rotates in the direction of arrow B. At the same time, the rotation mechanism 31 is interlocked with the rotation mechanism 27 with a ratchet and rotates in the direction of arrow C. At this time, the rotation mechanism 29 with a ratchet idles.

The ratchet mechanism of the rotating mechanism with ratchet 29 operates when the passive shaft 17 rotates in the direction of arrow D, and the rotating mechanism with ratchet 29 rotates in the direction of arrow D. At the same time, the rotation direction conversion mechanism 35 is interlocked with the rotation mechanism 29 with a ratchet and rotates in the direction of arrow E. Further, the rotation mechanism 33 is interlocked with the rotation direction conversion mechanism 35 and rotates in the direction of arrow F. At this time, the ratchet-equipped rotation mechanism 27 idles.

The rotary shaft changing mechanism 35 is used to make the passive shaft 1
By converting the direction of the rotational movement of D in the D direction, the reciprocal rotational movement of the passive shaft 17 is transmitted to the power generation shaft 19 as a unidirectional rotational motion. The rotational energy of the power generation shaft 19 is transmitted to a generator (not shown).

As described above, in the first embodiment, by providing the hanging jig 5 on the floating type pressure receiving plate 3, it is possible to easily install and remove it from the land with a crane or the like. It is also possible to relocate it to a sea area where the wave energy distribution and demand match and to use it repeatedly.

In addition, the floating body 7 installed inside the guide frame 11 following the rise in water level and the change in tide level caused by waves.
Is actively moved in the vertical direction and water is poured into the floating body 7, so that the wave energy can be efficiently received and the operating rate can be improved. When a high wave that exceeds the design condition is applied, the floating body 7 can be submerged near the bottom of the water and the posture can be controlled so as not to receive wave force easily, so that the risk of damage can be reduced.

Further, by using the revolving double ratchet mechanism 15, the reciprocating rotary motion of the passive shaft 17 can be easily and efficiently converted into the unidirectional rotary motion of the power generating shaft 19.

In FIG. 1, the wave energy converter 1 is shown.
Was installed in front of the existing breakwater 25, but the installation place is not limited to this, and it can be installed in front of the offshore breakwater, around the artificial island or in front of the seawall on the coast. It is also possible to adjoin a stake of permeable jacket construction. Further, the floating type pressure receiving plate 3 may be installed not only as a single body but also as a plurality as shown in FIG. In this case, a partition plate (not shown) is installed in order to smooth the movement of the adjacent floating type pressure receiving plates 3 and reduce the loss of wave energy. When arranging in a plane around an artificial island or the like, a partition having a triangular plane is installed between adjacent floating body pressure receiving plates 3.

When the floating type pressure receiving plate 3 is installed on the entire surface of the revetment having a high reflectance, the cushioning material 10 as shown in FIG. 2 is attached to the floating body 7, and in addition to the space between the floating type pressure receiving plate 3 and the revetment. There is also a method of arranging a small pressure receiving plate and combining two pressure receiving plates to efficiently absorb the wave energy.

Next, a second embodiment will be described. FIG. 5 is an elevation sectional view of the wave energy conversion device 1a. As shown in FIG. 5, the wave energy conversion device 1a
Is composed of the floating body pressure receiving plate 3a, the revolving double ratchet mechanism 15, and the like. The revolving double ratchet mechanism 15 is installed on the water surface 23. The upper edge of the floating type pressure receiving plate 3a has a revolving double ratchet mechanism 1
5 is attached to the passive shaft 17. The power generation shaft 19 of the revolving double ratchet mechanism 15 is connected to a generator (not shown).

The floating type pressure receiving plate 3a is obtained by vertically inverting the floating type pressure receiving plate 3 of the first embodiment. Floating body 7
Is mounted in the guide frame 11 so as to be vertically movable. The floating body 7 is filled with water according to the wave state. The floating pressure receiving plate 3a is supported by using a support frame 28 that can be folded into a stepladder shape. Support frame 28
Is a material that is lightweight and has high bending toughness, such as lightweight steel. The revolving double ratchet mechanism 15 has the same structure as that of the first embodiment.

Next, the operation of the wave energy converter 1a will be described. The floating type pressure receiving plate 3a of the wave energy conversion device 1a senses the dominant period of the wave generated on the water surface 23, similarly to the floating type pressure receiving plate 3 of the first embodiment, and detects the floating body 7.
The position of and is poured into the floating body 7.

As shown in FIG. 5, when a wave is generated on the water surface 23, the floating type pressure receiving plate 3a swings in the direction of arrow G about the passive shaft 17 as an axis. At this time, the floating pressure receiving plate 3
The passive shaft 17 joined to a rotates alternately in forward and reverse directions. The rotational movement of the passive shaft 17 in the forward and reverse directions is performed in the same manner as in the first embodiment as a unidirectional rotational movement.
9 is transmitted.

Also in the second embodiment, by using the floating type pressure receiving plate 3a and the revolving double ratchet mechanism 15, the same effect as that of the first embodiment can be obtained. The location of the floating pressure receiving plate 3a is not limited to the front surface of the existing breakwater 25, as in the first embodiment.

The floating pressure plate 3a is not limited to cover the entire sea bottom 21 to the entire water surface 23 depending on the water depth, wave characteristics, and tide level conditions of the installed sea area. It is also possible to select a structure that covers approximately half of the water depth from the vicinity of the still water surface where the large. In addition, the floating type pressure receiving plate 3
When installing on the entire surface of the revetment with high reflectance, as in the first embodiment, by attaching a cushioning material to the floating body 7,
Efficiently absorbs wave energy.

Next, a third embodiment will be described. FIG. 6 is an elevation sectional view of the wave energy conversion device 1b. As shown in FIG. 6, the wave energy conversion device 1b
Is a floating type pressure receiving plate 3b, a chain 41, a rotation mechanism 42,
The counter weight 43, a revolving double ratchet (not shown), and the like are included.

The floating type pressure receiving plate 3b has substantially the same structure as the floating type pressure receiving plate 3 of the first embodiment. In the guide frame 11 of the floating body pressure receiving plate 3b, a floating body 7 that is vertically movable is attached. The floating body 7 is filled with water according to the wave state. The revolving double ratchet mechanism (not shown) has the same structure as that of the first embodiment.

The lower edge of the floating type pressure receiving plate 3b is joined to a foundation 40 formed on the seabed 21 by a hinge 37. The floating type pressure receiving plate 3b is connected to the counterweight 43 on the existing breakwater 25 side via a connecting member 39 provided at the upper end and a chain 41. The existing breakwater 25 is provided with a rotation mechanism 42 that interlocks with the chain 41.

A revolving double ratchet mechanism (not shown) is provided on the extension of the passive shaft 17, which is the rotating shaft of the rotating mechanism, and the power generation shaft of the revolving double ratchet mechanism is connected to a generator (not shown). To be done. The chain 41 transmits the reciprocating motion of the floating type pressure receiving plate 3b to the rotating mechanism 42, and the counterweight 43 controls the rotating direction of the rotating mechanism 42.

Next, the operation of the wave energy converter 1b will be described. The floating type pressure receiving plate 3b of the wave energy conversion device 1b detects the dominant period of the wave generated on the water surface 23 and detects the floating body 7 like the floating type pressure receiving plate 3 of the first embodiment.
The position of and is poured into the floating body 7.

As shown in FIG. 6, when a wave is generated on the water surface 23, the floating type pressure receiving plate 3b swings about the hinge 37 in the direction of arrow H. The chain 41 transmits the reciprocating motion of the floating type pressure receiving plate 3b to the rotating mechanism 42. The counter weight 43 controls the rotation direction of the rotation mechanism 42. The rotating mechanism 42 is interlocked with the reciprocating motion of the chain 41 and alternately rotates in the forward and reverse directions. At the same time, the passive shaft 17 integrally rotates with the rotating mechanism 42 and alternately rotates in the forward and reverse directions.

The rotational movement of the passive shaft 17 in the forward and reverse directions is the first
In the same manner as in the above embodiment, a revolving double ratchet mechanism (not shown) is used to transmit the rotational movement in one direction to the power generation shaft. Rotational energy of the power generation shaft is transmitted to a generator (not shown).

Next, a fourth embodiment will be described. FIG. 7 is an elevation sectional view of the wave energy conversion device 1c. As shown in FIG. 7, the wave energy conversion device 1c
Is composed of a floating pressure receiving plate 3c, a crank 45, a revolving double ratchet (not shown), and the like.

The floating type pressure receiving plate 3c has a structure similar to that of the floating type pressure receiving plate 3b of the third embodiment. The revolving double ratchet mechanism (not shown) has the same structure as that of the first embodiment.

The floating type pressure receiving plate 3c is connected to the rotating mechanism 44 on the existing breakwater 25 side through the connecting member 39 provided at the upper end and the crank 45. A revolving double ratchet mechanism (not shown) is provided on an extension of a passive shaft (not shown) that is a rotating shaft of the rotating mechanism 44, and a power generation shaft of the revolving double ratchet mechanism is a generator (not shown). Connected to. The crank 45 is a floating type pressure receiving plate 3c.
The swinging motion of the is transmitted to the rotation mechanism 44.

Next, the operation of the wave energy converter 1c will be described. The floating type pressure receiving plate 3c of the wave energy conversion device 1c senses the dominant period of the wave generated on the water surface 23, similarly to the floating type pressure receiving plate 3 of the first embodiment, and detects the floating body 7c.
The position of and is poured into the floating body 7.

As shown in FIG. 7, when a wave is generated on the water surface 23, the floating type pressure receiving plate 3c reciprocates in the direction of arrow I about the hinge 37 as an axis. The crank 45 transmits the reciprocating motion of the floating type pressure receiving plate 3c to the rotating mechanism 44 as a rotational motion in forward and reverse directions. When the rotating mechanism 44 rotates in the forward and reverse directions, the passive shaft (not shown) that is the rotating shaft of the rotating mechanism 44 also alternately rotates in the forward and reverse directions.

The rotary motion of the passive shaft (not shown) in the forward and reverse directions is performed as a unidirectional rotary motion by using a revolving double ratchet mechanism (not shown) in the same manner as in the first embodiment. It is transmitted to the power generation shaft. Rotational energy of the power generation shaft is transmitted to a generator (not shown).

Next, a fifth embodiment will be described. FIG. 8 is an elevation sectional view of the wave energy conversion device 1d. As shown in FIG. 8, the wave energy conversion device 1d
Is composed of a floating pressure receiving plate 3d, a sliding double ratchet mechanism 93, a generator 65, and the like.

The floating type pressure receiving plate 3d has the same structure as the floating type pressure receiving plate 3b of the third embodiment. The passive rods 87a and 87b of the sliding double ratchet mechanism 93 are
It is connected to the upper edge of the floating type pressure receiving plate 3d via the connecting member 39. The power generation shaft 89 of the sliding double ratchet mechanism 93 is connected to the power generator 65.

FIG. 9 is a schematic view of the sliding double ratchet mechanism 93. The sliding double ratchet mechanism 93 includes passive rods 87a and 87b, and a power generation shaft 89 having ratchet-equipped rotation mechanisms 91a and 91b. For the sliding double ratchet structure 93, a seawater-resistant material such as reinforced plastic or titanium alloy is used.

The passive rod 87a is a rotating mechanism 9 with a ratchet.
It is in contact with 1a. Further, the passive rod 87b is in contact with the ratchet-equipped rotation mechanism 91b. The passive rod 87a and the rotation mechanism 91a with a ratchet, and the passive rod 87b and the rotation mechanism 91b with a ratchet have a structure capable of interlocking with each other.

The ratchet-equipped rotating mechanism 91a is configured so that only the sliding movement of the passive rod 87a in the direction of the arrow O is generated by the power generation shaft 89.
The ratchet rotating mechanism 91b has a ratchet mechanism that transmits only the sliding movement of the passive rod 87b in the direction of arrow P to the passive shaft 89.

The ratchet-equipped rotation mechanism 91a transmits the movement of the passive rod 87a in the direction of arrow O to the power generation shaft 89 as the rotation in the direction of arrow Q. Rotation mechanism 91b with ratchet
Transmits the movement of the passive rod 87b in the arrow P direction as rotation in the arrow R direction to the power generation shaft 89.

Next, the operation of the wave energy converter 1d will be described. The floating body pressure receiving plate 3d of the wave energy conversion device 1d senses the dominant period of the wave generated on the water surface 23, similarly to the floating body pressure receiving plate 3 of the first embodiment, and the floating body 7d.
The position of and is poured into the floating body 7.

As shown in FIG. 8, when a wave is generated on the water surface 23, the floating pressure receiving plate 3d swings about the hinge 37 in the direction of arrow S. At this time, the floating pressure receiving plate 3
The passive rods 87a and 87b joined to d reciprocate. When the passive rods 87a and 87b reciprocate, the ratchet rotation mechanisms 91a and 91b rotate in the forward and reverse directions.

As described above, the ratchet mechanism of the ratchet rotating mechanism 91a operates when the passive rod 87a moves in the direction of the arrow O, and the ratchet rotating mechanism 9a.
1a rotates in the direction of arrow Q. At this time, the ratchet-equipped rotation mechanism 91b idles.

The ratchet mechanism of the ratchet rotating mechanism 91b acts when the passive rod 87b moves in the direction of arrow P, and the ratchet rotating mechanism 91b rotates in the direction of arrow R. At this time, the rotation mechanism 91a with a ratchet idles.

The rotation mechanisms 91a, 91b with ratchets provided between the passive rods 87a, 87b simultaneously rotate in opposite directions, so that the two rotation mechanisms 91a, 91b with ratchets alternate, as indicated by arrows Q (R). The rotational movement in the direction can be transmitted to the power generation shaft 89. The rotation energy of the power generation shaft 89 is transmitted to the power generator 65.

Also in the third to fifth embodiments, the floating type pressure receiving plates 3b, 3c, 3d, the revolving double ratchet mechanism, and the sliding double ratchet mechanism 93.
By using, the same effect as that of the first embodiment can be obtained. Further, the location of the floating body pressure receiving plates 3b, 3c, 3d is not limited to the front surface of the existing breakwater 25, as in the first embodiment. Further, when the floating pressure receiving plate 3 is installed on the entire surface of the revetment with high reflectance, as in the first embodiment,
By attaching a cushioning material to the floating body 7, the wave energy is efficiently absorbed.

Next, a sixth embodiment will be described. FIG. 10 is a plan view of the wave energy conversion device 51. The wave energy converter 51 includes a floating pressure receiving plate 53,
It is composed of an arm 55, a screw 59, a ball 61, a revolving double ratchet mechanism 15, a generator 65 and the like.

The floating body pressure receiving plate 53 has substantially the same structure as that of the floating body pressure receiving plate 3 of the first embodiment, and a vertically movable floating body 7 is provided in the guide frame. However, the floating type pressure receiving plate 53 is not a flap type that reciprocates around one side as an axis but a piston type that reciprocates back and forth. The revolving double ratchet mechanism 15 has the same structure as that of the first embodiment.

The floating type pressure receiving plate 53 has two
A book arm 55 is attached. The left and right arms 55 are connected by a connecting member 57, and a ball 61 is connected to the connecting member 57.
Is installed. The screw 59 is inserted into the ball 61. The arm 55 slides in the arrow J direction integrally with the floating pressure receiving plate 53, the connecting member 57, and the ball 61 by using a slide mechanism. The slide mechanism is, for example, a linear bearing or the like, and is fixed to a foundation formed on the seabed.

The ball 61 converts the reciprocal sliding movement of the floating type pressure receiving plate 53, the arm 55, the connecting member 57, and the ball 61 in the arrow J direction into the forward and reverse rotational movement of the screw 59. A ball 61 is placed near both ends of the screw 59.
A flange 63 is provided in order to prevent the slip-out. The passive shaft 17 of the revolving double ratchet mechanism 15 is
It is provided on the extension of the screw 59. The power generation shaft 19 of the revolving double ratchet mechanism 15 is connected to the power generator 65.

Next, the operation of the wave energy converter 51 will be described. The floating body pressure receiving plate 53 of the wave energy conversion device 51 senses the dominant cycle of the wave generated on the water surface and adjusts the position of the floating body 7 as in the floating body pressure receiving plate 3 of the first embodiment. Water is injected into 7.

When a wave is generated on the water surface, as shown in FIG. 10, the floating type pressure receiving plate 53, the arm 55, the connecting member 57, and the ball 61 integrally reciprocate in the arrow J direction. When the ball 61 reciprocates between the flanges 63 near both ends of the screw 59, the screw inside the ball 61 meshes with the screw outside the screw 59, and the screw 5
9 rotates in the forward and reverse directions. When the screw 59 rotates in the forward and reverse directions, the passive shaft 17 provided on the extension of the screw 59 also rotates in the forward and reverse directions.

The rotational movement of the passive shaft 19 in the forward and reverse directions is the first
In the same manner as in the above embodiment, the revolving double ratchet mechanism 15 is used to transmit the rotational movement in one direction to the power generation shaft 19. The rotational movement of the power generation shaft 19 is transmitted to the power generator 65.

As described above, also in the sixth embodiment, by using the floating type pressure receiving plate 53 and the revolving double ratchet mechanism 15, the same effect as that of the first embodiment can be obtained. Further, the floating type pressure receiving plate 53 can be arranged in the same place as in the first embodiment. When the floating type pressure receiving plate 3 is installed on the entire surface of the revetment having a high reflectance, a shock absorbing material is attached to the floating body 7 to efficiently absorb the wave energy, as in the first embodiment.

Next, a seventh embodiment will be described. FIG. 11 is a plan view of the wave energy conversion device 51a. The wave energy converter 51a includes the floating pressure receiving plate 5
3, arm 55, screws 59a and 59b, ball 6
1a, 61b, revolving double ratchet mechanism 70
Etc.

The floating type pressure receiving plate 53 is the same as the floating type pressure receiving plate 53 of the sixth embodiment, and is of a piston type that reciprocates back and forth. Further, the two arms 55 are vertically attached to the pressure receiving surface of the floating type pressure receiving plate 53, as in the sixth embodiment. The left and right arms 55 are connected by a connecting member 57a, and the two balls 6 are connected to the connecting member 57a.
1a and 61b are installed. Screws 59a and 59b are inserted into the balls 61a and 61b, respectively.

The arm 55 uses a slide mechanism to make use of the floating body pressure receiving plate 53, the connecting member 57a, and the balls 61a, 61.
Slide in the direction of arrow K together with b. The slide mechanism is, for example, a linear bearing or the like, and is fixed to the foundation.

The balls 61a and 61b are the floating type pressure receiving plate 5.
3, arm 55, connecting member 57a, balls 61a, 61
The reciprocating slide movement in the direction of arrow K of b
a and 59b are converted into rotational movements in the forward and reverse directions. However, the ball 61a and the screw 59a, and the ball 61b and the screw 59b are ball screws that convert the sliding movements in one direction into rotational movements in opposite directions. That is, when the screw 59a rotates in the forward direction, the screw 59b rotates in the reverse direction, and when the screw 59a rotates in the reverse direction, the screw 59b rotates in the forward direction.
A ball 61 is placed near both ends of the screws 59a and 59b.
flanges 63a, 6 to prevent the removal of a, 61b
3b is provided.

On the extension of the screws 59a and 59b,
Passive shaft 66 of revolving double ratchet mechanism 70
a and 66b are provided respectively. FIG. 12 is a vertical sectional view of the revolving double ratchet mechanism 70.

As shown in FIGS. 11 and 12, the revolving double ratchet mechanism 70 includes two passive shafts 66a,
66b, a power generation shaft 69, a rotation mechanism 67a with a ratchet,
67b, a rotation mechanism 73 and the like. The ratchet rotating mechanism 67a has a ratchet mechanism that transmits only the rotational movement of the passive shaft 66a in the direction of the arrow L to the ratchet rotating mechanism 67a, and the ratchet rotating mechanism 67b.
Has a ratchet mechanism that transmits only the rotational movement of the passive shaft 67b in the direction of arrow M to the rotating mechanism with ratchet 67b.

Rotating mechanism with ratchet 67a and rotating mechanism 73, rotating mechanism with ratchet 67b and rotating mechanism 73
Is a structure that can rotate in conjunction with each other. For example,
Rotation mechanism 67a, 67b with ratchet, rotation mechanism 73
Is a pulley, and the rotation mechanism 67a with a ratchet and the rotation mechanism 73 are connected by a chain 71a, and the rotation mechanism 67b with a ratchet and the rotation mechanism 73 are connected by a chain 71b.

The rotating mechanism with ratchet 67a, the chain 71a, and the rotating mechanism 73 transmit the rotary motion of the passive shaft 66a in the arrow L direction to the power generating shaft 69 as the rotary motion in the arrow N direction. The ratchet rotating mechanism 67b, the chain 71b, and the rotating mechanism 73 transmit the rotational movement of the passive shaft 66b in the arrow M direction as rotation in the arrow N direction to the power generation shaft 69.

Next, the operation of the wave energy converter 51a will be described. The floating pressure receiving plate 53 of the wave energy conversion device 51a is the floating pressure receiving plate 53 of the sixth embodiment.
Similarly to the above, the predominant period of waves generated on the water surface is sensed, the position of the floating body 7 is adjusted, and water is poured into the floating body 7.

When a wave is generated on the water surface, as shown in FIG. 11, the floating type pressure receiving plate 53, the arm 55, the connecting member 57a,
The balls 61a and 61b integrally reciprocate in the direction of arrow K. Ball 61a, 61b is screw 5
When the screws 63a and 63b near both ends of the balls 9a and 59b are reciprocated, the screw inside the ball 61a and the screw 5
The screw outside 9a, the screw inside ball 61b and the screw outside screw 59b mesh with each other, and screw 59
a and 59b rotate in the forward and reverse directions. Screw 59a,
When 59b rotates in the forward and reverse directions, the screw 59b
Passive shafts 66a and 66b provided on extensions of a and 59b
Rotates in the forward and reverse directions.

However, as described above, the screw 59a
And the screw 59b rotate in opposite directions at the same time.
The same applies to the passive shafts 66a and 66b. That is, when the passive shaft 66a rotates in the forward direction, the passive shaft 66b rotates in the reverse direction, and when the passive shaft 66a rotates in the reverse direction, the passive shaft 6 rotates.
6b rotates in the forward direction.

When the passive shaft 66a rotates in the direction of the arrow L, the ratchet mechanism of the ratchet rotating mechanism 67a operates and the ratchet rotating mechanism 67a rotates in the direction of the arrow L. The rotation of the ratchet rotating mechanism 67a is
It is transmitted to the rotation mechanism 73 by the chain 71a, and the power generation shaft 69 rotates in the direction of arrow N. At this time, the passive shaft 66b is rotating in the direction opposite to the arrow M, and the ratchet-equipped rotating mechanism 67b runs idle.

When the passive shaft 66b rotates in the direction of arrow M, the ratchet mechanism of the ratchet rotating mechanism 67b operates, and the ratchet rotating mechanism 67b rotates in the direction of arrow M. The rotation of the ratchet rotating mechanism 67b is
It is transmitted to the rotation mechanism 73 by the chain 71b, and the power generation shaft 69 rotates in the direction of arrow N. At this time, the passive shaft 66a is rotating in the direction opposite to the arrow L, and the ratchet-equipped rotating mechanism 67a is idle.

Two passive shafts 6 that rotate in forward and reverse directions
6a and 66b rotate in opposite directions at the same time, that is, the two passive shafts 66a and 66b alternately rotate in the positive direction, whereby the two passive shafts 66a and 66b alternately rotate in a constant direction. Can be transmitted to the power generation shaft 69. The rotational energy of the power generation shaft 69 is transmitted to the power generator 65.

As described above, in the seventh embodiment, by using the revolving double ratchet mechanism 70,
The reciprocating rotational movements of the passive shafts 66a and 66b, which are reversed to each other, can be easily and efficiently converted into the unidirectional rotational movement of the power generation shaft 69. Further, the effect of using the floating type pressure receiving plate 53 is similar to that of the first embodiment. The floating type pressure receiving plate 53 can be arranged in the same place as in the first embodiment. Further, when the floating body pressure receiving plate 3 is installed on the entire surface of the revetment having a high reflectance, a shock absorbing material is attached to the floating body 7 to efficiently absorb the wave energy as in the first embodiment.

Instead of the revolving double ratchet mechanism 70, a revolving double ratchet mechanism 70a shown in FIG. 13 may be used. FIG. 13 is a vertical cross-sectional view of the revolving double ratchet mechanism 70a.

Revolving double ratchet mechanism 70a
Are two passive shafts 66a and 66b, a power generation shaft 69, rotating mechanisms 75a and 75b, and rotating mechanisms 77a and 7 with a ratchet.
7b etc. In the revolving double ratchet mechanism 70a, a rotary mechanism 75a is provided on the passive shaft 66a. A rotating mechanism 75a is provided on the passive shaft 66b.
Further, the rotating shaft 77 with a ratchet is attached to the power generation shaft 69.
a and 77b are provided. Rotation mechanism 77 with ratchet
a and 77b are ratchet rotating mechanisms 77a and 77b.
Has a ratchet mechanism that transmits only the rotational movement in the direction of arrow N to the power generation shaft 69.

Rotating mechanism 75a and rotating mechanism 77a with ratchet, rotating mechanism 75b and rotating mechanism 77 with ratchet
b is a structure that can rotate in conjunction with each other. For example, the rotating mechanisms 75a, 75b and the rotating mechanisms 77a, 77b with a ratchet are pulleys, the rotating mechanism 75a and the rotating mechanism with a ratchet 77a are a chain 71a, and the rotating mechanism 75b and the rotating mechanism with a ratchet 77b are a chain 71b. To be done.

The reciprocating rotary motion of the passive shafts 66a and 66b is transmitted to the ratchet-equipped rotary mechanisms 77a and 77b through the chains 71a and 71b. When the rotating mechanisms with ratchet 77a, 77b rotate in the direction of arrow N, the ratchet mechanism of the rotating mechanisms with ratchet 77a, 77b act, and the power generation shaft 69 rotates in the direction of arrow N. When the ratchet rotating mechanisms 77a, 77b rotate in the direction opposite to the arrow N, the ratchet rotating mechanisms 77a, 77b.
b rotates idly, and no rotational movement is transmitted to the power generation shaft 69.

Revolving double ratchet mechanism 70a
Also in the above, by rotating the passive shaft 66a and the passive shaft 66b simultaneously in the opposite directions, the two passive shafts 66a,
Alternately from 66b, rotational movement in the direction of arrow N
9 can be transmitted.

As in the sixth and seventh embodiments, when reciprocating motion is obtained from the piston type floating pressure receiving plate 53, there is no neutral point and the floating pressure receiving plate 53 shifts in the wave traveling direction. Therefore, a stopper is installed on the land side to reciprocate at a balanced position. In addition, ball screws and revolving double ratchets are basically not installed underwater.

In the first to seventh embodiments, the floating type pressure receiving plate having the hollow floating body 7 is used.
Alternatively, a floating type pressure receiving plate 81 or the like may be used. Figure 1
4 is a plan sectional view of another floating type pressure receiving plate 81, and FIG.
4 is an elevation sectional view taken along line Y1-Y1 of FIG. Note that FIG.
FIG. 16 is a plan sectional view taken along line Y2-Y2 of FIG. In the floating body pressure receiving plate 81, plate-like floating bodies 85 that can move up and down are arranged in parallel in a multi-stage manner within a guide frame 83.
By sliding a plurality of floating bodies 85 up and down according to the wave state and moving all the floating bodies 85 to the lowest stage during abnormal waves, the same effect as that of the floating type pressure receiving plate having the floating body 7 can be obtained.

In the sixth and seventh embodiments, the revolving double ratchet mechanism is used by converting the reciprocating motion of the piston type floating type pressure receiving plate into the rotary motion. The reciprocating motion is shown in FIG. The sliding double ratchet mechanism 93 may be used for transmission to the power generation shaft 89.

Revolving double ratchet mechanism 15,
The rotating mechanism used for the 70 and 70a is not limited to the gears and the pulleys, but may be any mechanism capable of transmitting the motions of the passive shaft, the power generating shaft, the rotating shaft, etc. by interlocking with each other. 12,
When interlocking a plurality of pulleys as shown in FIG. 13, a belt may be used instead of the chains 71a and 71b.
Floating pressure plate, revolving double ratchet mechanism,
A rod, a wire, or the like can be used as the connecting member that connects the converting mechanism such as the sliding double ratchet mechanism.

Sliding double ratchet mechanism 93
The passive rods 87a and 87b and the ratchet-equipped rotation mechanisms 91a and 91b used for the above may also be those capable of transmitting the motion in cooperation with each other.

[0100]

As described above in detail, according to the present invention, it has a simple and efficient conversion mechanism and a function of significantly reducing the wave force received during an abnormal wave, and the life before relocation and removal is improved. It is possible to provide a wave energy conversion device that can reduce cycle costs.

[Brief description of drawings]

FIG. 1 is an elevation sectional view of a wave energy conversion device 1.

FIG. 2 is a plan sectional view of the floating type pressure receiving plate 3.

FIG. 3 is an elevation view of a plurality of floating type pressure receiving plates 3.

FIG. 4 is a schematic view of a revolving double ratchet mechanism 15.

FIG. 5 is an elevation sectional view of the wave energy conversion device 1a.

FIG. 6 is an elevation sectional view of the wave energy conversion device 1b.

FIG. 7 is an elevation sectional view of the wave energy conversion device 1c.

FIG. 8 is an elevation sectional view of the wave energy conversion device 1d.

FIG. 9 is a schematic view of a sliding double ratchet mechanism 93.

FIG. 10 is a plan view of a wave energy conversion device 51.

FIG. 11 is a plan view of a wave energy conversion device 51a.

FIG. 12 is a vertical cross-sectional view of a revolving double ratchet mechanism 70.

FIG. 13 is a vertical cross-sectional view of the revolving double ratchet mechanism 70a.

FIG. 14 is a plan sectional view of another pressure receiving plate 81.

FIG. 15 is an elevation sectional view taken along line Y1-Y1 of FIG.

[Explanation of symbols]

1, 1a, 1b, 1c, 51, 51a ... Wave energy conversion devices 3, 3a, 3b, 3c, 53, 81 ... Floating body pressure receiving plate 5 ... Hanging jig 7, 85 ... Floating body 9 ... Horizontal partition 10 ... Buffer material 11, 83 ... Guide frame 15 ... Revolving double ratchet mechanism 17, 66a, 66b ... Passive shaft 19, 69, 89 ... Power generation shaft 27 , 29, 67a, 67b, 77a, 77b, 91
a, 91b ... Rotating mechanism with ratchet 31, 33, 42, 44, 73, 75a, 75b ...
Rotation mechanism 35 ... Rotation direction conversion mechanisms 39, 57, 57a ... Connection members 41, 71a, 71b ... Chain 43 ... Counterweight 45 ... Cranks 59, 59a, 59b ... Screw 61 , 61a, 61b ......... Balls 87a, 87b ..... Passive rod 93 ..... Sliding double ratchet mechanism

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masatoshi Nagatomi             Kashima-ken, 1-2-7 Moto-Akasaka, Minato-ku, Tokyo             Inside the corporation F term (reference) 3H074 AA02 AA12 BB01 BB10 BB19                       CC02 CC10 CC50

Claims (14)

[Claims] 1. A pressure receiving plate which floats in water and oscillates by wave force, and a conversion means which converts the oscillating motion of the pressure receiving plate into a rotary motion of a power generation shaft. Wave energy converter. 2. The wave energy conversion device according to claim 1, wherein the conversion means is a revolving double ratchet mechanism having a passive shaft and a power generation shaft. 3. The wave energy conversion device according to claim 1, wherein the pressure receiving plate is provided with a movable floating body inside. 4. The wave energy conversion device according to claim 2, wherein the pressure receiving plate is attached to the passive shaft of the converting means, and performs a swinging motion about the passive shaft. 5. The wave energy conversion device according to claim 4, wherein the conversion means is installed on the seabed. 6. The wave energy conversion device according to claim 4, wherein the conversion means is installed on the surface of the sea. 7. The wave force according to claim 2, wherein one end of the pressure receiving plate is hinged to the seabed side, and connecting means is provided between the other end of the pressure receiving plate and the converting means. Energy conversion device. 8. The connecting means includes a rotating mechanism provided on the passive shaft on the converting means side, and a chain provided between the other end of the pressure receiving plate and the rotating mechanism. The wave energy conversion device according to claim 7, wherein 9. The connecting means is a rotating mechanism provided on the passive shaft on the converting means side, and a crank attached to the other end of the pressure receiving plate and the rotating mechanism. 7. The wave energy conversion device according to 7. 10. The converting means is a sliding double ratchet mechanism, one end of the pressure receiving plate is hinged to the seabed side, and a connecting means is provided between the other end of the pressure receiving plate and the converting means. The wave energy conversion device according to claim 1, wherein: 11. A wave force comprising: a pressure receiving plate that floats in water and reciprocates by wave force; and a conversion unit that converts the reciprocating motion of the pressure receiving plate into a rotary motion of a power generation shaft. Energy conversion device. 12. The wave energy conversion device according to claim 11, wherein the conversion means is a revolving double ratchet mechanism having a power generation shaft. 13. The pressure receiving plate is provided with a pair of arms, the arms are provided with balls through a connecting member, the balls are provided with screws, and the screws are connected to the revolving double ratchet mechanism. 13. The wave energy conversion device according to claim 12, wherein: 14. The wave energy conversion device according to claim 11, wherein the pressure receiving plate is provided with a movable floating body inside thereof.