JP2012172590A - Tidal current power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that a conventional tidal current power generator is difficult to deal with a tidal water level, a natural water level, and directions of forward and backward flows of a tidal current, when assembling a base for mounting a power generator in the sea and establishing the power generator on the base.SOLUTION: In a tidal current power generator which is lightweight and can be easy to move, a slip ring for fixing a hook, a speed increasing gear, and a generator are installed in a streamlined hollow cylinder. Rotation speed of external propellers is increased with the speed increasing gear connected via a shaft, and is connected to the generator for power generation. The generated power of the generator is charged in a storage cell. The problems caused by the forward and backward flows of the tidal current and the ebb and flow of the tide can be solved by a chain connected with the hook arranged at a tip of the streamlined hollow cylinder. Blades are arranged on a synchronously rotated body of an impeller so as to rotate the body in a reverse direction against the propeller and rotation of the generator can be accelerated.

Description

  The present invention relates to a generator that uses kinetic energy of a tidal current.

Many conventional generators have been developed, but they are fixed on land, and started from water turbines. There are many wind turbine systems, steam turbine systems, vibration systems, etc., but they float freely in water. As a result, there is no generator along the tidal current.

In the prior art, in some underwater generators, the force increases as the number of screws increases in the cylindrical shape with a large diameter. Therefore, if the length of the tube is longer, the number of screws can be increased, so that the force of water flow is received. You can, and the force on the central axis increases. In addition, it is possible to cope with the flow from the top like a waterfall by standing up the cylinder, and it is possible to cope with the tides by arranging the generator in the middle and attaching the screws symmetrically. Moreover, a wave block type generator can be made by building it in the middle of a concrete block, which seems to be good for rough seas in the Sea of Japan in winter (Japanese Patent Laid-Open No. 2000-9012).

On the other hand, the tidal current power generation device is provided with a cylindrical state having an enlarged portion that expands toward each end portion, a water turbine that is provided in the axially central portion of the cylindrical body, and is rotated by the tidal current. And a generator that generates electric power by rotation. Thus, since the water wheel is provided in the axial center part of the cylindrical body, when the cylindrical body is extended in a direction along the tidal current, the tidal current flows into the internal space from one end side of the cylindrical body. When the water flows to the other end, the water turbine is rotated to generate electric power (Japanese Patent Laid-Open No. 2005-240786).

JP2000-9012 JP-A-2005-240786

The cylindrical power generation device in the prior art is not connected to increase the rotation of the generator, although the torque obtained by the generator is strengthened when many propellers are installed in one generator. One of the propellers is enough to find the rotation only for power generation, so it is judged that there is no effect even if many propellers are installed. Rather, how much the propeller rotation speed can be increased is an important issue.

Furthermore, the tidal current is full of tidal currents, and countermeasures are needed when the water level is high or low.For example, if the tidal current at the time of the initial setting is a normal flow and there is a reverse flow that changes the flow in the opposite direction, Then, in the prior art, in order to cope with the reverse flow, the twisted propeller opposite to the normal flow propeller is installed coaxially with the same cylindrical body. At the same time, there is a drawback that the propeller for reverse flow becomes an obstacle to the flow velocity in the cylinder and does not increase the flow velocity, but rather reduces the rotation speed of the propeller in the water flow.

  On the other hand, in the prior art, the method of flowing a large amount of tidal current into a square trumpet seems to be effective, but when a large amount of water is injected into a cylinder of a certain diameter, the diameter is smaller than the inlet As a result, the water cannot flow completely and overflows, causing turbulent flow, and the flow rate of a large amount of water passing through the position of the propeller in the cylinder is rather slow.

In addition, the square tube may be stable to install the device, but the inner cross section of the tube is round, but the flowing water at the four corners flowing in from the square trumpet mouth that takes in the tidal current is throttled to the round cross section, so the four corner portions There is a drawback that the flowing water does not flow completely and causes a reverse flow action, and the concentrated water does not flow sufficiently to cause turbulent flow, reducing the flow velocity and reducing the rotation speed of the propeller. Also, when the tidal current is reversed, the trumpet shape is not automatically changed, so it is difficult to change the trumpet shape in a timely manner, and changing the trumpet shape manually is necessary for all day. Seems almost impossible.

  In order to eliminate these disadvantages, the present invention eliminates countermeasures for obtaining a water level that allows the generator to function sufficiently when the water level changes due to tidal fluctuations, and countermeasures for which the tidal current always flows forward and reverse twice. Furthermore, it is a means for solving the problem of how fast the generator is rotated at the speed of the tidal current.

According to the present invention, a generator and a speed increaser mounted in a streamlined water-inhibited hollow body are connected to a shaft linked to a propeller provided at a terminal outside the body, and the propeller is connected to the body. The body is structured by the wings so as to rotate in the reverse direction of the rotation direction of the propeller, the speed increaser and the generator, and the rotation of the propeller and the body rotation is reversed. It is connected to a hook provided at the outer tip of the body with a chain or rope connected to a bridge girder to prevent drifting in the current so that the body can rotate according to the current. Is a tidal current generator, which is fixed to a slip ring provided in the front part of the body and can float freely in tidal water.

The tidal current generator is provided with four wings in the shape of a cross in the longitudinal direction of the side outside the body from the length of about 1/2 of the body toward the rear in order to rotate the body in the direction opposite to the propeller. The tidal current generator is characterized by being twisted so as to rotate in the opposite direction to the twist of the propeller blades, floating in the water, and rotating the body in the opposite direction to the propeller.

The wings equipped in the tidal current generator extend at an angle of about 30 to 60 degrees toward the rear of the body in order to prevent dirt and the like floating in the water from being caught by the wings. At the same time, the propeller wings also extend diagonally to the rear of about 30 to 60 degrees. Like the wings of the body, floating dust in the water, along with the wings and wings that extend diagonally even if they adhere, A tidal current generator characterized by flowing to the rear along the flow.

A streamlined hollow body has a built-in generator, step-up gear, and slip ring. A propeller is provided at the outer end of the body, and the shaft mounted on the propeller is a step-up gear in a sealed body that prevents inundation. Furthermore, it is connected to a generator by a shaft, and a hook is provided at a tip outside the body, and the hook is assembled to a slip ring in a sealed body to prevent water immersion.

If the body rotates in the propeller rotation direction in synchronization with the propeller rotation, the power generation efficiency decreases, so the body is rotated in the opposite direction to the propeller to increase the power generation efficiency. Four wings are provided in a cross in the longitudinal direction of the side of the body from the length of about 1/2 of the body toward the rear, and each wing is twisted to rotate in the opposite direction to the twist of the propeller blades. The rotation of the propeller and the rotation of the body rotate in opposite directions according to the speed of the tidal current in the water, so that the rotation of the propeller is increased and the speed of the generator is increased by the speed increaser in the body. Therefore, it is a tidal current generator that can increase the power generation efficiency.

And since the tidal power generator is put into the water in the tidal current and the chain connected to the hook 4 at the tip is fixed to the bridge girder etc., the tidal power generator rises due to the tidal current and the effectiveness of the propeller and wing. When the propeller and wing are exposed on the water surface, the function of the propeller and wing disappears, so the tidal current generator is completely immersed in the water, and the upper part of the propeller and wing is about 100m / m to 200m / m below the water surface. Moderate functions can be obtained, and the water flow is about 300 m / m from the water surface, which is the fastest condition for power generation effect.

Furthermore, in the tidal current generator, the wings attached to the body extend obliquely about 30 to 60 degrees toward the rear of the body in order to prevent floating dust etc. in the water from being caught by the wings. ing. At the same time, the propeller wings also extend diagonally about 30 to 60 degrees to the rear. Like body wings, floating debris in the water, even if attached, extends diagonally to the rear along the wings and wings. It comes to flow.

  Since the tidal generator is floating in the tidal current with a chain connected to the hook 4, the tidal power generator is connected to the chain, etc. It is possible to respond to tidal changes that float freely and the water level changes, and the tip of body 1 is connected to the chain, so it always moves upward, and even if it flows backward, Since the tip hook 4 is connected, the tidal current generator changes its direction naturally and can generate power. The tidal current generator has an advantage that it can be easily moved because the total weight is about 30 to 50 kg.

  The tidal current generator floating in the tidal current rotates the propeller 2 by the tidal current, the speed of the shaft 5 is increased by the speed increaser 6 and is connected to the power generator 7, so that the rotation of the power generator 7 is increased. On the other hand, because the rotation direction of the propeller 2 and the rotation of the body 1 are reversed by the wings 3 to which the body 1 is mounted outside, the rotation speed of the generator is the same as the rotation of the propeller 2 and the body 1. Because of the reverse rotation, the rotation speed of the propeller 2 and the body 1 is increased to the added rotation speed, so that the generator has the same rotation speed.

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

  In FIG. 1, a tidal generator is connected to a hook 4, and the tidal generator connected to the chain is freely floated along the tidal current in water, and the tidal current direction is opposite Since the tidal power generator is connected to the tip hook 4 with a free chain, the tip hook is always at the head, and the direction can be easily reversed. In addition, since the tidal current generator connected by the chain rotates and a twisting stress is applied to the chain and the chain may be cut, the hook 4 is connected to the slip ring 8 in the body 1 that is prevented from being immersed. The slip ring 8 has an action of eliminating the twisting stress of the hook 4 connected to the chain, and has an action of preventing cutting due to the twist of the chain and preventing the body 1 from rotating.

If the tidal current generator is put into the tidal current and there are no four blades 3 mounted on the body 1, the propeller 2 at the rear of the body 1 starts to rotate due to the tidal current. The power generation efficiency starts to decrease in synchronization with the direction of rotation of the wing 3, but the blades 3 mounted in the cross direction on the body 1 are twisted so as to rotate counterclockwise with the propeller 2, so that the propeller 2 rotates. Even so, each of the four blades 3 of the body 1 is twisted so that the body 1 rotates in the reverse direction in which the propeller 2 rotates, so that the body 1 and the propeller 2 rotate synchronously. Instead, the body 1 rotates the propeller 2 in the reverse direction. As a result, the rotation of the propeller 2 is accelerated, and the power generation effect is increased.

As for the inside of the body 1 having the power generation function, in FIG. 2, the shaft 5 is connected from the external propeller 2 to the speed increaser 6 through the body 1, and the magnification of the speed increaser 6 is about 30/1 to 50 / The rotational speed is increased by 1, and the generator 7 is connected.

The shaft 5 for taking in the rotation of the propeller 2 inserted in the body 1 of the tidal current generator is sealed so that water does not enter. This is to prevent the generated power from leaking in the water when water enters the body 1, but because the body 1 is hollow, the tidal generator is floated by connecting the tip with a chain. Since the state is fixed, the tidal generator will rise up against the flow of the tidal current, and the propeller 2 and wing 3 will no longer function. When the body 1 enters the water and the propeller 2 and the wing 3 are submerged to about 100 m / m to 200 m / m below the surface of the water, the functions of the propeller 2 and the wing 3 can be fully utilized. It is necessary to consider the position to perform.

FIG. 3 is a schematic power generation circuit diagram. When the speed of the propeller 2 is increased by about 30 to 50 times with the speed increaser 6 and the shaft 5 is connected to the power generator 7, the power generator 7 rotates. Since 1 rotates in reverse with the propeller 2, the generator 7 rotates at an increased speed and the power generated increases. The power is charged in the storage battery 10, and the power is picked up from the storage battery 10 and used for the purpose.

Overall view of tidal current generator Inside view of tidal current generator Power generation outline circuit diagram

1 Body 2 Propeller 3 Wings 4 Hooks 5 Shaft 6 Gearbox 7 Generator 8 Slip Ring 9 Current Pickup Brush 10 Storage Battery

Claims (3)

A generator and speed increaser installed in a streamlined water-inhibited hollow body are connected to a shaft linked to a propeller provided at the end of the body, and the body is connected to a propeller and a reverse rotation torsion. The body is structured by the wings so that they rotate in the reverse direction of the rotation direction of the series of propellers, speed increaser and generator, and the rotation of the generator is increased because the propeller rotation and body rotation are reversed. It is connected to a hook provided at the outer end of the body with a chain or rope connected to a bridge girder to prevent drifting in the current so that the body can rotate according to the current. A tidal current generator characterized by being fixed to a slip ring provided at the front and allowing floating freely in tidal water. The tidal current generator is provided with four wings in the shape of a cross in the longitudinal direction of the side outside the body from the length of about 1/2 of the body toward the rear in order to rotate the body in the direction opposite to the propeller. The tidal current generator is characterized by being twisted so as to rotate in the opposite direction to the twist of the propeller blades, floating in the water, and rotating the body in the opposite direction to the propeller. The wings equipped in the tidal current generator extend at an angle of about 30 to 60 degrees toward the rear of the body in order to prevent dirt and the like floating in the water from being caught by the wings. At the same time, the propeller wings also extend diagonally to the rear of about 30 to 60 degrees. Like the wings of the body, floating dust in the water, along with the wings and wings that extend diagonally even if they adhere, A tidal current generator characterized by flowing to the rear along the flow.

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