JP6060406B2 - Wave power generator - Google Patents

Description

  The present invention relates to a wave power generator using wave energy, which is one of natural energy.

  Conventionally, many wave power generators using wave energy have been developed. As a main wave power generator, an oscillating water column type wave power generator (for example, refer to Patent Document 1) that generates power by rotating a turbine with an oscillating flow of air generated by vertical movement of the sea surface. In addition, an overtopping wave power generation device (for example, see Patent Document 2) that generates power by turning a water wheel when draining, converts wave energy into mechanical kinetic energy via a movable object, and moves a piston to generate power. A movable object type wave power generation device (see, for example, Patent Document 3) is known.

  The oscillating water column type wave power generation device disclosed in Patent Document 1 is provided with at least two chambers in the direction of arrival of the waves, and provided with an opening / closing device in a chamber located in front of the arrival of the waves, The chamber is configured to communicate with the atmosphere, and generates electric power by rotating an air turbine by generating an oscillating flow of air from the vertical movement of the sea surface.

  Further, the overtopping wave power generation device disclosed in Patent Document 2 has an inclined surface that is inclined from the periphery on the lower end side of the water surface toward the center that is opened upward, and communicates with the underwater side downward from the opening. A structure with a water turbine and a generator in the pool and its communication part. The water level of the water that entered the pool through the opening as the wave moved up the slope with the movement of the wave and the water level outside the device The turbine is rotated by the difference in water level to generate electricity.

  The movable object type wave power generator disclosed in Patent Document 3 is a linear structure in which a water surface floating body is connected to a moving pulley provided in water, one end is fixed to the seabed, and a tension maintaining member is attached to the other end. The structure is such that the member is hung on a moving pulley, and the pulley is rotated by the vertical movement of the water surface float to rotate the shaft to generate electricity.

JP-A-61-190171 JP 2006-283648 A Special table 2010-507042 gazette

  In the above-mentioned Patent Document 1, there is a problem that a chamber and an air turbine for generating an oscillating flow of air from the vertical movement of the sea surface are required, the efficiency is low, the apparatus is large and expensive.

  Moreover, in the said patent document 2, when a water surface wave is gentle and a wave height is low, there is a problem that the amount of overtopping going up an inclined surface decreases and power generation amount falls.

  Moreover, in the said patent document 3, when a water surface wave is gentle and a wave height is low, a water surface floating body does not fully move up and down, and it is difficult to obtain the rotation speed required for electric power generation.

  In view of such circumstances, the present invention efficiently converts the vertical movement of the water surface wave into a mechanical rotational motion even when the water surface wave is gentle and the wave height is low, and the wave energy is converted into electric energy. It is an object of the present invention to provide a highly efficient wave power generator with a simple structure for conversion.

In order to achieve the above object, the wave power generator according to claim 1 of the present invention is a support in which a power transmission roller protrudes from a side surface of a column at a required interval on a column fixed or moored on the seabed. A floating body is attached so as to be freely rotatable on the shaft, and a floating body is attached so that it can move up and down along the support column. A hollow portion through which the support column and the power transmission roller can pass is provided at the center of the floating body. Is disposed so that the side surface of the spiral blade of the screw is in contact with at least one of the power transmission rollers, and a generator is connected to the screw. When the floating body moves up and down, the power transmission roller engages with the side surface of the spiral blade of the screw, the screw rotates, and the generator connected to the screw rotates to generate power. And it is characterized in that it is configured to so that.

  Next, in the wave power generation device according to claim 2 of the present invention, a gear is formed on an outer peripheral portion of the spiral blade of the screw, and the gear meshes with a gear attached to a rotating shaft of the generator. It is characterized by generating electricity by rotating the machine.

  Next, the wave power generator according to claim 3 of the present invention is characterized in that a groove for guiding the power transmission roller is formed on a side surface of the spiral blade of the screw.

  Next, in the wave power generation device according to claim 4 of the present invention, the power transmission roller is attached rotatably on a support shaft protruding from the side surface of the support so as to sandwich the spiral blade of the screw. It is characterized by this.

  According to the invention which concerns on Claim 1 thru | or 4, even if it is a case where a water surface wave is gentle and a wave height is low, a generator can be rotated by the up-and-down movement of a slight water surface wave. For example, when the pitch of the spiral blade of the screw is 30 mm, when the wave height is 30 cm, the screw rotates 10 times with a half-cycle wave, and the wave energy can be efficiently converted into electric energy.

  Furthermore, according to the invention which concerns on Claim 2, attachment or detachment of a generator can be performed easily.

  Further, when a gear having a smaller number of teeth than that of the gear formed on the outer peripheral portion of the spiral blade of the screw is attached to the rotating shaft of the generator, the generator is rotated at a higher speed. The output can be improved.

It is a front view which shows schematic structure of the wave power generator of this embodiment. It is a top view which shows schematic structure of the wave power generator of this embodiment. It is a front view which shows schematic structure of the wave power generator of other embodiment. It is a top view which shows schematic structure of the wave power generator of other embodiment. In the wave power generator of this embodiment, it is a top view which shows the combination of a screw and a power transmission roller. In the wave power generator of this embodiment, it is a front view which shows schematic structure in case the gearwheel is formed in the outer peripheral part of the spiral blade of a screw. In the wave power generator of this embodiment, it is a partially notched front view which shows the engagement state of a screw and a power transmission roller. In the wave power generator of this embodiment, it is a partially notched front view which shows the engagement state of a screw and a power transmission roller.

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings.

In the wave power generation device of the present embodiment shown in FIGS. 1 and 2, a hexagonal column 1a is fixed to the seabed, and a power transmission roller 2 is rotatably provided on a support shaft protruding from one side of the column 1a. There is a hollow part through which the pillar 1a and the power transmission roller 2 can penetrate in the central part of the floating body 3 so that it can move up and down along the pillar 1a. The hollow part has a guide roller 7a for supporting the floating body 3, 7b and 7c (guide rollers 7b and 7c are not shown in FIG. 1) are attached, and on the upper part of the floating body 3, the axis of the screw 4 is parallel to the axis of the column 1a . The spiral blade 4 a is rotatably installed so that the side surface of the spiral blade 4 a contacts the power transmission roller 2, and the generator 5 is connected to the screw 4.

  When the floating body 3 moves up and down along the support pillar 1 a by waves, the power transmission roller 2 engages with the side surface of the spiral blade 4 a of the screw 4, so that the screw 4 rotates and the generator 5 connected to the screw 4 rotates. Let it generate electricity.

  Since the power transmission roller 2 engages with the side surface of the spiral blade 4a of the screw 4 and rotates the screw 4 while making rolling contact, the power from the linear motion to the rotational motion can be efficiently transmitted with little wear.

  When the power transmission roller 2 is attached at the same pitch as the pitch of the spiral blade 4a of the screw 4, when the floating body 3 moves by the pitch of the power transmission roller 2, the screw 4 rotates once, and the power transmission roller 2 is screwed. When the floating body 3 is moved by the pitch of the power transmission roller 2, the screw 4 is rotated twice, and the water surface wave is moved up and down. Thus, the generator 5 can be rotated.

  When three of the power transmission rollers 2 are engaged with the side surface of the spiral blade 4a of the screw 4, at least one of the three contacts the upper side of the side surface of the spiral blade 4a, and at least the remaining two One piece contacts the lower side of the side surface of the spiral blade 4 a and eliminates the backlash between the power transmission roller 2 and the spiral blade 4 a of the screw 4, so that the floating body 3 moves up and down smoothly and is stable to the rotational motion of the screw 4. Power transmission can be performed and transmission efficiency can be improved.

  3 and FIG. 4, the wave power generation device of the present embodiment is configured so that the side surface of the spiral blade 4 a of the screw 4 is located at the position where the two screws 4 are parallel to the support column 1 and opposed to each other. It is rotatably installed so as to contact the power transmission roller 2.

  The wave power generator according to the present embodiment shown in FIG. 5 has a power transmission roller 2 attached to a position where the three screws 4 are parallel to the support column 1 and the support column 1 is arranged in three parts. It is installed so that it can rotate freely.

  As shown in FIGS. 3 to 5, the screw 4 and the generator 5 can be easily added or removed according to the situation of the installation location.

  In the wave power generator of this embodiment shown in FIG. 6, two screws 4 are arranged in parallel with the support 1 at the top of the floating body 3, and a gear 6 a is formed on the outer peripheral surface of the spiral blade 4 a of the screw 4. Then, the gear 6a meshes with the gear 6 attached to the rotating shaft of the generator 5, and the generator 5 is rotated to generate power.

  In the case of the configuration as shown in FIG. 6, the generator 5 can be easily attached and detached according to the situation of the installation place.

  Further, when the gear 6 having a smaller number of teeth than the gear 6a formed on the outer peripheral portion of the spiral blade 4a of the screw 4 is attached to the rotating shaft of the generator 5, the generator 5 is rotated at an increased speed. Thus, the output of the generator can be improved.

  7 and 8 show an engaged state between the spiral blade 4b of the screw 4 and the power transmission rollers 2a, 2b, 2c, and 2d in the wave power generation device of the present embodiment.

  As shown in FIG. 7, grooves 8a and 8b for guiding the power transmission rollers 2a and 2b are formed on both sides of the spiral blade 4b of the screw 4, and the power transmission roller 2a contacts the groove 8b on the side surface of the spiral blade 4b. The power transmission roller 2b comes into contact with the groove 8a on the side surface of the spiral blade 4c, and the floating body 3 moves up and down smoothly by eliminating the backlash between the column 1 provided with the power transmission rollers 2a and 2b and the screw 4. , Stable power transmission to the rotational motion of the screw 4 can be performed, and transmission efficiency can be improved.

  Further, as shown in FIG. 8, grooves 8a and 8b for guiding the power transmission rollers 2c and 2d are formed on both side surfaces of the spiral blade 4b of the screw 4, and the power transmission roller 2c is a groove 8a on the side surface of the spiral blade 4b. The power transmission roller 2d is in contact with the groove 8b on the side surface of the spiral blade 4b, and the power transmission rollers 2c and 2d sandwich the spiral blade 4b of the screw 4 so that the power transmission rollers 2c and 2d are attached. By eliminating the backlash between the screw 1 and the screw 4, the floating body 3 smoothly moves up and down, stable power transmission can be performed, and transmission efficiency can be improved.

  Further, the power transmission rollers 2c and 2d abut on both sides of the spiral blade 4b so that the power transmission rollers 2c and 2d can support the floating body 3, and a guide roller for supporting the floating body 3 is provided. It becomes unnecessary and the structure can be simplified.

1, 1a Post 2, 2a, 2b, 2c, 2d Power transmission roller 3 Floating body 4 Screw 4a, 4b Spiral blade 5 Generator 6, 6a Gear 7a, 7b, 7c Guide roller 8a, 8b Groove

Claims (4)

A power transmission roller is attached to a support fixed or moored on the seabed at a required interval on a support shaft that protrudes from a side surface of the support, and a floating body is attached so that it can move up and down along the support. There is a hollow part through which the support column and the power transmission roller can penetrate in the central part of the shaft, and the axis of the screw is parallel to the axis of the support column in the floating body, and the side surface of the spiral blade of the screw is the power transmission The generator is connected to at least one of the rollers, the generator is connected to the screw, and the floating body moves up and down to engage the power transmission roller with the side surface of the spiral blade of the screw, thereby the screw. The wave power generator is configured to generate power by rotating the generator continuously connected to the screw. A power transmission roller is attached to a support fixed or moored on the seabed at a required interval on a support shaft that protrudes from a side surface of the support, and a floating body is attached so that it can move up and down along the support. There is a hollow part through which the support column and the power transmission roller can penetrate in the central part of the shaft, and the axis of the screw is parallel to the axis of the support column in the floating body, and the side surface of the spiral blade of the screw is the power transmission A gear is formed on the outer periphery of the screw spiral blade, and the power transmission roller is engaged with the side surface of the screw spiral blade by moving up and down. The screw rotates, the gear formed on the spiral blade of the screw meshes with the gear attached to the rotating shaft of the generator, and the generator is rotated. Wave power generation apparatus characterized by being configured to electricity.   The wave power generation device according to claim 1, wherein a groove for guiding the power transmission roller is formed on a side surface of the spiral blade of the screw.   4. The wave power generation according to claim 1, wherein the power transmission roller is rotatably attached on a support shaft protruding from a side surface of the support so as to sandwich the spiral blade of the screw. 5. apparatus.

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