JP3233097U - Power generation device using wave motion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation device for driving a generator by using a wave crashing on a coast. SOLUTION: A screw shaft 1 is installed near the coast in parallel with the direction of a wave crashing, and a left-handed blade 3a and a right-handed blade 3b are provided as a pair on the screw shaft 1 to form a left-handed blade shaft 2a. The right-handed blade shaft 2b is used, and both shafts are not connected but can be interlocked. A one-way clutch is provided so that the direction is always constant regardless of the direction. [Selection diagram] Fig. 1

Description

It relates to a power generation device capable of rotating a screw shaft by using waves and driving a generator by the rotation of the screw shaft to generate electricity.

There are various types of power generation equipment, including hydroelectric power generation equipment that uses the hydraulic power that flows using the head of water, and thermal power generation that uses high-pressure steam generated from a boiler to burn coal and heavy oil to rotate a turbine to generate electricity. There are known devices, nuclear power generators that rotate turbines using steam generated by using nuclear power instead of coal and heavy oil.
In recent years, a wind power generator that generates electricity by rotating a wind turbine using the flow of wind, and a hydroelectric power generator that rotates a water turbine using the flow of a river have also been used.
On the other hand, photovoltaic power generation devices that convert electricity using sunlight without turning a turbine are also widespread today.

Furthermore, it is also possible to generate electricity using the waves generated in the sea, the energy possessed by the waves is large, and the waves are struck on the coast throughout the year, and this wave energy is used to generate electricity. It is possible to rotate.
The "wave power generation wave power" according to Japanese Patent Application Laid-Open No. 2014-20360 has many difficult problems such as high equipment cost in the use of waves and tidal currents in areas where the ocean wind is always strong. Therefore, it is a method to make the best use of the wide sea waves.

In other words, it has a box-shaped body that looks like a funnel lying down, and the upper and lower sides become narrower toward the back, and a ventilation pipe is connected upward to the back end so that the bottom surface matches the slope of the gravel coast. This slanted body is installed on the sea surface of the rushing waves and the rushing waves. Waves rush at the entrance of the opening At the center of the main body, the air is pushed toward the back with the lid on, and the compressed air is pushed into the ventilation pipe upward at the back end, and after the pulling waves, it is repeatedly pushed. This is a mechanism in which the blade wind turbine is rotated by the compressed air generated repeatedly and the rotational force is transmitted to the generator to generate electricity.

The "offshore wave power generator" according to Japanese Patent Application Laid-Open No. 2012-2218 is a wave power generator that opposes waves and the lower part of an air chamber that compresses air by wave power or takes in air from the atmosphere. The opening under the water surface at the front end of the device is connected by a closed horizontal water channel to reduce the spring frequency of the air chamber, while the mass of seawater that causes waves in the air chamber is directly involved in the seawater in front of the power generator. By increasing the natural vibration period of this seawater mass motion so that it is at the same level as the period of the meaningful wave and resonating with each other, it is possible to take in wave power inside the wave power generator without waste. In addition to making it possible, the air chamber is equipped with a large-capacity intake tank and the same exhaust tank via a one-way valve, and a constant-speed rotary turbine generator is installed inside the duct that communicates with the atmosphere. ..
"Wave power of wavy power generation" according to Japanese Patent Application Laid-Open No. 2014-20360 "Offshore wave power generator" according to Japanese Patent Application Laid-Open No. 2012-2218

As described above, various power generation devices using wave energy are known. However, each wave power generator has its own advantages and disadvantages.
The problem to be solved by the present invention is to provide a power generation device using waves, which is configured to be able to generate power efficiently with a relatively simple structure.

In the power generation device using the wave motion according to the present invention, a screw shaft or a blade shaft is installed on the shore to rotatably support the shaft. Therefore, if a wave hits the shore, the wave hits a screw or a blade so that the shaft can rotate. When the waves that hit parallel to the shaft hit the screws and blades, they are converted into forces in the direction of rotation, and the rotation can drive the generator.
Here, the specific structure of the screw shaft and the specific structure of the blade shaft are not limited.

By the way, there are two types of waves, one that hits the coast and the other that pulls off the coast. In the present invention, the screw shaft or the blade shaft is configured to rotate so that power can be generated for both waves. There is.
Therefore, the screws and blades provided on the shaft are divided into a part that rotationally drives the shaft and a part that idles by the waves that hit it, and a part that rotates and drives the shaft by the waves that pull offshore. There is.
Therefore, a one-way clutch is provided so that the one-way clutch is turned on and off according to the direction of the wave.

The screw shaft and the blade shaft are interlocked with each other via gears or the like so as to drive the generator to rotate. By operating the one-way clutch, the shaft can rotate in a certain direction regardless of the direction of the wave to drive the generator.
By the way, the operation of the one-way clutch can be controlled by receiving a signal from a sensor that detects the movement of a wave.
Of course, it is possible to control mechanically instead of electrically controlling, but the specific structure is not limited.

The present invention is a power generation device using wave motion, and the screw shaft or blade shaft rotates to capture the movement of the wave, and the generator can operate. The structure is relatively simple, as it is only necessary to install the screw shaft and blade shaft in a suitable place where the waves hit. Therefore, there is no failure related to the screw shaft and the blade shaft, and the installation cost is low.
And since the shaft is equipped with a one-way clutch, it rotates regardless of the direction of the wave, and the power generation efficiency becomes high.

An embodiment showing a screw shaft constituting a power generation device using the wave motion of the present invention. A specific example of a one-way clutch when both shafts are fitted to the core shaft. FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. A device that drives a generator with gears attached to the tip of the core shaft.

FIG. 1 is an example showing a screw shaft 1 constituting a wave power generation device. The screw shaft 1 in the figure is formed with a spiral blade 3 wound around a shaft 2 extending straight.
In the screw shaft 1a shown in (a), if a left-handed blade 3a is provided on the shaft 2a and a wave in the arrow direction (→) acts on the screw shaft 1a, the shaft 2a can rotate counterclockwise. Here, (→) represents a wave that hits toward the coast.

The screw shaft 1b shown in (b) is provided with a right-handed blade 3b on the shaft 2b, and the shaft 2b can rotate counterclockwise if a wave in the arrow direction (←) acts on the shaft 2b. Here, (←) indicates a wave in which the rushed wave returns to the offshore direction.
The screw shaft 1 of the present invention can rotate to the left regardless of the wave in any direction.

In the power generation device of the present invention, the straight shaft 2a is provided with the left-handed blade 3a, and the shaft 2b is provided with the right-handed blade 3b. Here, the shaft 2a and the shaft 2b are not continuous, and the core shaft 4 is fitted in the shaft hole provided in the central shaft portion.
Therefore, the core shaft 4 is fitted in the shaft hole of the shaft 2a, the core shaft 4 is also fitted in the shaft hole of the shaft 2b, and both shafts 2a and 2b are interlocked with each other via the core shaft 4.
In this way, the shaft 2a and the shaft 2b provided by pairing the left-handed blade 3a and the right-handed blade 3b can rotate counterclockwise with respect to waves from either the left or right direction, and this rotation is used as the core shaft 4. The generator is driven by transmission.

FIG. 2 is a specific example showing a connecting portion between the shaft 2a and the shaft 2b. The shaft 2a is provided with a spline shaft hole 6a, and the spline shaft portion 5 is provided at an intermediate portion of the core shaft 4. In FIG. 2, the spline shaft portion 5 is fitted in the spline shaft hole 6a of the left shaft 2a, and the spline shaft hole 6b of the right shaft 2b is detached from the spline shaft portion 5.
Therefore, the rotation of the shaft 2a is transmitted to the core shaft 4, and the core shaft 4 rotates to the left. In this case, since the spline shaft hole 6b of the shaft 2b is not fitted in the spline shaft portion 5, the rotation of the shaft 2b is not transmitted to the core shaft 4.

In FIG. 1, if the wave acts in the direction of the arrow (→), the left-handed blade 3a and the shaft 2a move in the direction of the arrow (→) to the right, and the spline shaft hole 6a of the shaft 2a is the spline shaft portion 5. Can be combined with.
Then, the right-handed blade 3b and the shaft 2b are also pushed to the right by the waves in the same direction (→) and move, and as a result, the spline shaft hole 6b is separated from the spline shaft portion 5.

If a right-handed wave acts on the right-handed blade 3b on the right side, the shaft 2b will rotate to the right, but since it is off the spline shaft portion 5, it will not be transmitted to the core shaft 4 and will run idle. Just do.
On the contrary, when a wave in the left direction acts, the right-handed blade 3b and the shaft 2b move to the left, the spline shaft hole 6b fits into the spline shaft portion 5, and the shaft 2b rotates counterclockwise. Then, the shaft 2a is pushed to the left together with the left-handed blade 3a, and the spline shaft hole 6a is disengaged from the spline shaft portion 5.

As described above, the screw shaft 1 is provided with a one-way clutch capable of transmitting only rotation in a certain direction to the core shaft 4, and is configured to rotate according to the direction of the wave to drive the generator. is doing.
The spline type clutch shown in FIGS. 2 and 3 is just one specific example, and can be switched by using another method.
For example, the direction of the wave can be detected by a camera, the electromagnetic clutch can be turned on and off, and the left-handed blade shaft or the right-handed blade shaft can be rotated to drive the generator.
By the way, it is also possible to mount the screw shaft 1 shown in FIG. 1 so as to move up and down in the vertical direction according to the height of the wave moving up and down.

FIG. 4 shows a generator 7 connected to the core shaft 4, which has a bevel gear 8 at the tip of the core shaft 4 and a bevel gear 9 at the lower end of the spindle 10 extending downward from the generator 7. There is. The two bevel gears 8 and 9 mesh with each other, and the rotation of the core shaft 4 rotates the main shaft 10 of the generator 7, and this rotation can generate electricity. The number of teeth of the bevel gears 8 and 9 is not limited, but the continuously variable transmission mechanism is used to keep the rotation speed of the spindle 10 constant so as not to be affected by the rotation speed of the core shaft 4 which changes depending on the wave strength. May intervene in.

By the way, the screw shaft 1 that rotates by wave motion is merely a specific example. It is also possible to attach a plurality of left-facing blades to the shaft 2a and a plurality of right-facing blades to the shaft 2b.
The left-pointing blade can function as a left-handed blade 3a, and the right-pointing blade can function as a right-handed blade 3b.

On the other hand, when the sea is calm and the waves are small, the screw shaft cannot be sufficiently rotated. Therefore, the generated power is reduced.
Therefore, in the present invention, a large water storage tank is installed on a hill, and seawater is stored in this water storage tank. Then, when the sea becomes calm and the waves are small, seawater can flow down from the water storage tank and the screw can be rotated by the flow of seawater.
Of course, the generator can be rotationally driven by rotating the water turbine by flowing it through the blades of the water turbine instead of the screw.

1 Screw shaft 2 Shaft 3 Blade 4 Core shaft 5 Spline shaft 6 Spline shaft hole 7 Generator 8 Bevel gear 9 Bevel gear
10 spindle

Claims (4)

In a power generator that drives a generator using waves that hit the coast, a screw shaft is installed near the coast in parallel with the direction of the waves that hit the coast, and the screw shaft is paired with a left-handed blade and a right-handed blade. The left-handed blade shaft and the right-handed blade shaft are provided, and although both shafts are not continuous, they are interlocked via a core shaft that fits into the shaft hole provided in the central shaft of the shaft.
It is characterized in that a one-way clutch is provided so that the rotation direction of the shaft provided with the left-handed blade and the rotation direction of the shaft provided with the right-handed blade are always constant regardless of the direction of the rushing wave. A power generation device that uses waves. As the one-way clutch, a spline shaft is provided on the core shaft, a spline shaft hole is provided at the end of the shaft, and the blade is pressed by the acting wave and slides so that the spline shaft of the core shaft is placed in the spline shaft hole. The power generation device using the wave motion according to claim 1, which is fitted and slid in the opposite direction to be disengaged. The power generation device according to claim 1 or 2, wherein the screw shaft is a left-facing blade shaft and a right-facing blade shaft provided with a pair of left-facing blades and right-facing blades. The power generation device using the wave motion according to claim 1, 2, or 3, wherein the screw shaft is mounted so as to be able to move up and down in the vertical direction according to the height of the wave.

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