JP2015218671A - Tidal flow power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tidal flow power generator installed in sea in which blades are efficiently rotated with tidal flow to generate electricity.SOLUTION: This invention relates to a tidal flow power generator comprising an outline frame 9 standing in a tidal flow F; a rotational power unit including a rotating body having blades 3 rotated upon reception of the tidal flow F in the outline frame 9 and a power generator driven under rotation of the rotating body. The rotating body is constituted in such a way that a plurality of blade shafts 2 having blades 3 are protruded in a radial manner at the central main rotary shaft 1 and there are provided blade converting mechanisms 4 between the central main rotary shaft 1 and the blades 3 to enable the blades 3 to be forcedly converted into a vertical state when a tidal flow sensor detects that the blade shafts 2 are faced towards the upper stream and in turn the blades 3 to be forcedly converted into a horizontal state when the tidal flow sensor detects that the blade shafts 2 are faced towards the downstream. The upper end part and the lower end part of the main rotary shaft 1 of the central main rotary shaft 1 are rotatably supported at the outline frame 9 and a power generator is installed at the outline frame 9 through a rotation transmitting part between it and the main rotary shaft 1.

Description

  The present invention relates to a tidal current power generation apparatus that obtains electric power by operating a power generator by rotating blades provided radially on a rotating shaft that stands upright in the sea and rotating the rotating shaft.

There is a tidal current flowing in a certain direction in the sea, and the tidal current is slow compared to the flow velocity of rivers, etc., but the energy is extremely large, and the realization of a device that can use tidal energy as power due to the recent increase in power demand Is long-awaited. However, it is very difficult to install the tidal current because it is located in a deep sea floor away from the land, and various tidal current power generation devices have been proposed, but they are hardly used at present.
For example, Patent Document 1 below proposes a “wind power generation device that also serves as a tidal current power generation device” in which a rotating blade is rotated in a horizontal direction to operate a power generator.
In the apparatus of Patent Document 1, the undulation of the rotating blade is induced by rotation induction bending, and the rotating blade is raised on one side to receive the power flow around the vertical rotating shaft that obtains electric power by rotating, and the other side rotates. It has a structure in which the rotation of the longitudinal rotating shaft can be obtained by spending the tidal current while lying down on the blade, and the rotating blade rotates the vertical rotating shaft in response to the tidal current to obtain electric power.

JP 2010-180876 A

However, in the apparatus of Patent Document 1, the rotation of the rotating blades receiving the tidal current is arranged at a position biased toward the upper side instead of the center of the rotating blades, and the blade surface is undulated by pressure induction by rotation-induced bending. It is difficult to obtain a rotational force efficiently.
The reason for this is that the rotating blades that have been rotated and guided by rotation-guided bending in the tidal direction and have stood up slightly obliquely have a plate surface that eventually rises due to their own weight and the pressure on the blade surface of the tidal current, so the tidal current is slow In this case, the undulation force for rotation-induced bending cannot be obtained sufficiently. Conversely, when the tidal current is fast, the rotational speed is high and the rotating blades are strongly subjected to seawater resistance. This is because it is difficult to quickly undulate the blade surface at the blade switching position.
In addition, the entire structure of the device is a saddle-shaped structure in which a detour prevention plate support for vertically supporting the central vertical rotation shaft is fixed to the seabed, so it must be installed on the deep seafloor with fast tides. I can't.

  Therefore, the present invention provides a tidal current power generation device that can be easily installed in a deep sea floor where there is a large tidal current, and that can obtain a large amount of power from a slow tidal current by always rotating the rotating shaft of the blade receiving the tidal current efficiently. For the purpose.

In order to solve the above-mentioned problem, in the invention of claim 1 of the tidal current power generation device of the present invention, a rotation provided with an outer frame stationary in the tidal current and a blade rotating in response to the tidal current within the outer frame. A tidal power generator including a rotary power unit including a body and a generator that operates by rotation of the rotary body.
The rotating body radially projects a plurality of blade shafts provided with the blades on a central rotation main shaft, and the blade shaft is directed upstream by a tidal direction sensor between the rotation main shaft and the blades. When it is detected that the blade is in the vertical state, when it is detected that the blade is directed downstream, the blade is in the horizontal state, and can be forcibly switched by reciprocation of the piston in the cylinder by the hydraulic pressure connected to the blade. And the outer frame is rotatably supported by the outer spindle.

  In the invention of claim 2, in the above invention, the blade changing mechanism includes a hydraulic cylinder that changes the blade, a piston inside the hydraulic cylinder, a compressor that is a pressure source to the cylinder, the compressor, and the cylinder. A pressure feeding pipe for oil liquid provided between, an electromagnetic valve provided in the pressure feeding pipe so that the circulation of the oil liquid can be interrupted, a valve control unit for controlling opening and closing of the electromagnetic valve, and the valve control And a storage battery connected to a generator as a power source for the compressor, the electromagnetic valve, and the valve control unit.

  According to a third aspect of the present invention, in the above invention, the outer frame includes an upper horizontal frame having an upper bearing portion that supports the upper end portion of the rotating main shaft, and a lower bearing that supports the lower end portion of the rotating main shaft. A lower horizontal frame provided with a portion and an outer vertical frame connecting the upper horizontal frame and the lower horizontal frame are formed so as to surround the entire blades and blade shafts.

  In the invention of claim 4, in the above invention, an annular rail centering on the center line is fixed to the tip of each blade shaft provided radially from the center line of the rotation main shaft, and The frame is provided with an annular rail guide portion that restrains movement of the annular rail from the outside in the vertical direction and supports the annular rail so as to be freely slidable in the circumferential direction.

  In the invention of claim 5, in the above invention, a float having a shape with low tidal resistance is provided on the upper part of the outer frame, and the entire apparatus is floated by the buoyancy, and a plurality of moorings moored on the sea floor at the lower part of the outer frame. The upper part of the mooring material is fixed and the outer frame is moored in a non-rotatable manner during the tidal current.

  In the invention of claim 6, in the above invention, the cylinder of the blade changing mechanism and the piston built in the cylinder form an arc shape, and the blades are horizontally and vertically angled 90 by the reciprocating rotation of the piston. The piston and the blade are connected so as to reciprocate each time.

  In the invention of claim 7, in the above invention, the cylinder of the blade change mechanism and the piston built in the cylinder form a cylindrical shape, and the reciprocation of the piston rod connected to the piston causes the crank, The piston rod and the blade are connected so that the blade reciprocally rotates at an angle of 90 degrees horizontally and vertically via at least one of a belt, a wire, and a chain.

  The invention according to claim 8 is characterized in that in the above invention, the blade provided on one blade shaft is divided into a plurality of blades, and each blade is provided with the blade switching mechanism.

  In the invention of claim 9, in the above invention, the installation area of the generator and the storage battery and the installation area of the compressor, the solenoid valve and the valve control unit are respectively covered with a sealed case and the inside of the sealed case is filled with air. It was made to be characterized.

In the present invention, when the vane changing mechanism provided in the rotating body K senses that the vane axis is directed upstream by the tidal current direction sensor and senses that the vane is directed in the vertical state and directed downstream. In the horizontal state, the direction of the blade is forcibly changed in a short time by the reciprocation of the piston in the cylinder by the hydraulic pressure connected to the blade.
And the maximum tidal current is received by the blade surface standing vertically on one side with respect to the flow direction of the tidal current, and on the other side, the blade surface is horizontal to avoid resistance, and the rotation supported by the outer frame receiving the tidal current It becomes possible to rotate the rotation main shaft of the body with maximum efficiency. The generator is operated by the rotation of the rotating spindle. As a result, even if the tidal current is slow, the tidal current is received over the entire vertical blade surface, thereby efficiently converting the tidal current energy into electric energy. Is possible.

In the invention of claim 2, by the blade switching mechanism, the pressurized oil liquid connected to the compressor is sent from the pressure feed pipe to the hydraulic cylinder, and the piston in the cylinder is operated by the pressure of the oil liquid, The blade connected to the piston is rotated in a short time.
At that time, the timing of opening and closing the solenoid valve by the valve control unit is set so as to operate when the tidal direction sensor senses that the blade axis is directed upstream and downstream of the tidal current. When the piston in the cylinder is operated by the pressure of the oil liquid provided in the pumping pipe, the blade connected to the piston moves from the horizontal state to the vertical state when the blade shaft faces the upstream direction of the tidal current, and to the downstream direction. It is possible to forcibly rotate each 90 degrees from the vertical state to the horizontal state.
That is, a rotating body that has received a tidal current by forcibly rotating the blades by hydraulic pressure with the blade changing mechanism and minimizing the time until the blades change from horizontal to vertical and from vertical to horizontal It is possible to efficiently obtain the rotational force.

In the invention of claim 3, since the entire apparatus installed in the sea has an integral structure with the inner rotating body by the outer frame, the outer frame is inclined by receiving a tidal current from one direction and the rotation main shaft is in the vertical direction. Even if an inclination occurs, the blades are always switched vertically in the upstream direction and horizontally in the downstream direction according to the direction of the flow in response to the signal from the flow direction sensor that senses the direction of the flow. . As a result, the rotation main shaft can continue normal rotation, so that the inclination of the outer frame does not become a major obstacle to power generation.
In addition, the entire device can be manufactured by factory production, and the manufactured device can be transported to the installation location, where the length of the mooring material is adjusted according to the depth of the seabed, and the entire device is easily put into the sea. It can be installed, and the device can be easily pulled up and moved to another location.

  In the invention of claim 4, since the annular rail connecting the tips of the blade shafts is supported by the annular rail guide portion provided on the outer vertical frame of the outer frame and the blades can be stably rotated, Is prevented from being shaken, and the rotation main shaft can be stably rotated to efficiently generate power.

In the invention of claim 5, even if the water depth to the seabed is large, it can be installed at an appropriate depth by adjusting the length of the mooring material in the deep sea where a strong tidal current flows. For this reason, it is possible to effectively use the large energy of the tidal current by utilizing the strong tidal current flowing on the deep seabed.
Further, the lower part of the apparatus is pulled down by the mooring material, and a buoyancy that constantly pulls up the entire apparatus is acting on the float at the upper part of the apparatus, so that the entire apparatus does not turn upside down or fall down greatly.
Further, since the funnel provided at the upper part of the outer frame has little resistance to tidal currents, it is possible to prevent the center line of the rotating main shaft penetrating through the outer frame vertically due to the tidal currents from being excessively inclined with respect to the vertical line.

In the invention of claim 6, the vane changing mechanism is configured such that the arc-shaped piston rotates and reciprocates in the cylinder connected to the hydraulic pipe, and the blade connected to the piston is forcibly secured in 90 degrees in a short time. Can be rotated.
And since it becomes possible to rotate a blade | wing directly by rotation of a circular-arc-shaped piston, the mechanism which converts reciprocation into rotation is unnecessary, and the blade conversion mechanism can be made compact.
Further, since the cylinder portion in which the arc-shaped piston reciprocates is a disc shape, the resistance of the tidal current received by the cylinder portion is small, and smooth rotation of the rotating spindle can be maintained.

  In the invention of claim 7, a normal cylindrical cylinder is used, and the piston rod connected to the piston is reciprocated stably by various operating structures using a crank, a gear, a belt, a wire, or a chain. The blade can be rotated 90 degrees.

In the invention of claim 8, by dividing the blade into a plurality of small areas with respect to one blade axis, the force is weaker than one large blade that is not divided by the blade switching mechanism provided for each of the divided blades. Even so, each blade can be easily rotated. For this reason, each blade switching mechanism can be made compact.
In addition, by setting the operation of each blade in order from the outer peripheral side to the inner side with the time difference in order to control the opening / closing operation of the solenoid valves provided by the valve control unit, the limited pressurization capacity of the compressor is time differenced. The blades provided with the long blade shaft can be reliably rotated even with a small pressure.

  In invention of Claim 9, since a generator, a storage battery, a compressor, a solenoid valve, etc. are stored in a sealed case that is filled with air and does not contain seawater, these components are not brought into contact with seawater. It is possible to extend the life of the device by protecting from salt damage.

It is a perspective view which shows the use condition of this invention. It is a perspective view which shows a rotary body. It is a vertical side view which shows the principal part around a generator. It is a vertical side view which shows the principal part of a blade | wing change mechanism. It is a perspective view which shows the form which used the blade | wing as the division | segmentation blade | wing. It is a perspective view which shows the form of the blade | wing change mechanism by a circular arc cylinder. It is a vertical side view which shows the form of the circular arc cylinder of FIG. FIG. 7 is a perspective view of each longitudinal section showing a state in which a cylinder case (b) shown in (b) is removed from a cylinder case shown in (a) in the arc-shaped cylinder configuration of FIG. 6. It is a typical side view which shows the form of the circular arc cylinder of FIG. It is a vertical side view which shows the form of the blade | wing change mechanism by the gear of a cylindrical cylinder. It is a vertical side view which shows the form of the blade | wing change mechanism by the crank of a cylindrical cylinder. It is a vertical side view which shows the form of the blade | wing change mechanism by the belt of a cylindrical cylinder.

Embodiments of a tidal current power generation device of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the present invention rotates the blade 3 using the energy of the tidal current F in the middle layer of the sea U below the sea level L, and rotates the generator to generate power. A rotating power unit comprising an outer frame 9 placed in the tidal current F, and a rotating body K having blades 3 that rotate in response to the tidal current F in the outer frame 9, as shown in FIG. As shown in FIG. 2, a generator 22 that operates by the rotation of the rotating body K is provided.

As shown in FIG. 2, the rotating body K includes the blade shafts 2 in a plurality of upper and lower stages projecting radially from the center line x of the center rotating main shaft 1.
Then, a flat plate-like blade 3 is mounted on the blade shaft 2 so that the center of the plate surface coincides with the center line y of the blade shaft 2 and can be rotated 90 degrees about the center line y.

The blade 3 preferably has a large area in order to capture a slow current in the middle U of the sea U and obtain a large rotational force. The size of the blade 3 is not limited, but is, for example, 1 to 5 m wide and long. An extremely large blade 3 of 10 to 50 m can be used.
The thickness of the blade 3 is made as thin as possible so that a horizontal flow in a horizontal state can easily pass. In addition, when thickening the center of the blade | wing 3 for the mounting | wearing to each blade shaft 2, it is good to form a cross section in a streamline type.
In FIG. 5, the blade | wing 3 of the aspect which formed the center part thickly and thinned the front end was shown in order to raise the intensity | strength of a board surface. And if the inside of the blade | wing 3 is made into a cavity, since buoyancy is obtained, it can prevent that a long blade | wing hangs down with dead weight.
The material of the blade 3 and the blade shaft 2 is preferably made of stainless steel that is less likely to be corroded by seawater. In addition, a plate having a metal film coated on the surface of the metal plate can be used to prevent corrosion.
It is preferable to make the plate surface of the blade 3 as flat as possible because resistance to the power flow of the blade in the horizontal state is reduced, but the surface in the rotational direction is slightly swollen and the back surface is a slightly curved surface that is slightly recessed. By forming, it may be easy to receive the tidal current from behind the blade 3.

Further, the rotating main shaft 1 can be a rod-like or pipe-shaped shaft made of stainless steel, and requires a strength capable of supporting the blade shaft 2 provided with the blade 3 that rotates by receiving the pressure of the tidal current.
As shown in FIG. 1, a plurality of upper and lower blade shafts 2 project radially from the peripheral wall of the rotating main shaft 1 at equal intervals.
1 and 2 show an embodiment in which four blade shafts 2 are projected radially at intervals of 90 degrees on one stage portion of the rotating main shaft 1, but the angle and number thereof are not limited.

As shown in FIG. 4, when the tidal direction sensor 46 senses that the blade shaft 2 is directed upstream between the rotating main shaft 1 and the blade 3, the blade 3 is in a vertical state from the horizontal direction. Further, when it is sensed that the blade 3 is directed in the downstream direction, the blade 3 is changed from the vertical direction to the horizontal state by forcible conversion by the reciprocation of the piston in the cylinder 50 by the hydraulic pressure connected to the blade 3. A mechanism 4 is provided.
The blade switching mechanism 4 is provided with a compressor 40 as a pressure source, and electromagnetic valves 42 and 43 are supplied to pressure feeding pipes 44 and 45 that reciprocate the oil pressure pressurized by the compressor 40 to the blade switching mechanisms 4. Is provided.
Then, as shown in FIG. 6, the blade 3 is moved in the horizontal direction by reciprocating the piston 52 in the cylinder 51 with the pressure of the oil sent from the pressure feed pipes 44 and 45 through the electromagnetic valves 42 and 43. It is possible to turn 90 degrees vertically.

Further, as shown in FIG. 4, each electromagnetic valve 42, 43 receives a signal sensed by a tidal direction sensor 46 that senses the direction of tidal current provided on the rotary main shaft 2 depending on the water pressure. 3 includes a valve control unit 41 that opens and closes each of the electromagnetic valves 42 and 43 at a timing set so as to operate 3 from the horizontal direction to the vertical direction.
Reference numeral 47 in FIG. 4 denotes a sensor receiving line that transmits information on the tidal direction from the tidal direction sensor 46 to the valve control unit 41.
For example, the tidal current direction sensor 46 is provided with sensor pressure-receiving portions directed to the periphery at 8 to 16 locations at equal intervals, and the direction of the sensor pressure-receiving portion where the maximum pressure is obtained from the pressure difference is the direction of the flow of the middle flow It is possible to use a tidal direction sensor for determining

Since the rotating body K is rotatably supported in the outer frame 9, an upper bearing portion 5 is provided at the upper portion of the rotating main shaft 1, and a lower bearing portion 6 is provided at the lower portion, and the outer frame 9 has the above-described outer frame 9. The rotary spindle 1 is supported in an upright state.
Therefore, as shown in FIG. 1, the upper bearing portion 5 of the rotating main shaft 1 is supported by the upper bearing portion 7, and an upper horizontal frame 13 is fixed to the upper bearing portion 7. The side bearing portion 6 is supported by the lower bearing portion 8 and a lower horizontal frame 14 is fixed to the lower bearing portion 8. Further, the upper horizontal frame 13 and the lower horizontal frame 14 are connected and fixed by an outer vertical frame 15.
That is, as shown in FIG. 1, each blade centered on the rotation main shaft 1 in an outer frame 9 that surrounds each blade 3 and the blade shaft 2 by the upper horizontal frame 13, the lower horizontal frame 14, and the outer vertical frame 15. The rotating body K, which is composed of the shaft 2 and the blades 3 and is rotated by receiving the tidal current, is housed to form a rotational power unit that rotates the rotating main shaft 1 by the tidal current.
In FIG. 1, the upper outer frame 16 and the lower outer frame are fixed to each frame in order to firmly fix the frame parts to each other by preventing the lateral deflection of the ends of the upper horizontal frame 13 and the lower horizontal frame 14 in the outer frame 9 in FIG. Although the aspect which fixedly provided the frame 17 is shown, the whole said outer frame 9 is couple | bonded more firmly in this aspect.
Moreover, it is preferable to use stainless steel which is strong and hardly corroded as the material of the upper horizontal frame 13 and the lower horizontal frame 14 and the upper outer peripheral frame 16 and the lower outer peripheral frame 17 of the outer frame 9.

As shown in FIG. 1, the rotation main shaft 1 provided with the radial blade shaft 2 is provided radially on the same plane from the center line x of the rotation main shaft 1 so that the rotation main shaft 1 can stably rotate without shaking. An annular rail 18 centering on the center line x is fixed to the tip 2a of each blade shaft 2, and inside the outer vertical frame 15 constituting the outer frame 9 facing the annular rail 18 in a proximity state, An annular rail guide portion 19 that restrains the annular rail 18 from moving up and down from the outside and is slidable in the circumferential direction is provided.
In this embodiment, the base end portion of the long blade 3 is supported by the rotating main shaft 1, and the tip portion is supported by the annular rail guide portion 19. The rotation center line (x) can be stably rotated without shaking.

Further, a float 10 is provided on the upper portion of the outer frame 9 to float the entire apparatus by its buoyancy, and the upper portions of the plurality of linear anchoring materials 11 moored on the seabed G are fixed to the lower portion of the outer frame 9.
As shown in FIG. 1, the plurality of anchoring materials 11 are installed so as not to rotate the outer frame 9 by being anchored to the seabed G with anchors 12 with their lower portions separated from each other. Then, the rotating body K is rotated by the blade 3 that has received the tidal current F in the outer frame 9.
In FIG. 1, the number of the linear mooring materials 11 is four. However, the number is not limited, and the outer frame 9 cannot be rotated by being connected to the outer frame 9 apart from each other. The anchoring material 11 needs to be moored to the seabed G with a certain tension by the anchor 12 that descends to the seabed.
As the mooring material 11, a material having such a large strength that it cannot be broken even when the entire device floating in the sea U such as a wire, a chain, and a rope is subjected to the resistance of the tidal current F is used.

Further, the float 10 provided on the upper part of the outer frame 9 is formed in a shape having a low resistance to the flow of the tidal current.
For example, it is preferable that the disk-like box 10a has a vertical cross section that is a streamline in the horizontal direction.
In the present invention, since the entire apparatus is unstablely floating in the sea U, if the resistance of the float 10 is large, the anchor 12 may move along the seabed G due to the force of the tidal current F, and the entire apparatus may be swept away. The reason for making the float 10 into a shape with low resistance is to prevent this.
Note that the length of the blade shaft 2 and the width of the blade 3 are not limited, and can be designed to have any size according to the scale of the entire apparatus, and the outer frame 9 is also formed in a size according to the size. To do.

1 and 2 show a configuration in which one blade 3 is attached to one blade shaft 2, but as shown in FIG. It is possible to divide.
When the blade 3 is divided into small portions, the resistance of seawater to the blades 3 is dispersed when the blades 3 are rotated 90 degrees to change the direction, and the rotational resistance of the divided blades 3 can be reduced.
For example, FIG. 5 shows an example in which the blade 3 is divided into three pieces for one blade shaft 2. In this embodiment, the blade changing mechanism 4 is attached to each of the divided blades 3a, 3b, and 3c. A stainless steel pipe is used for the blade shaft 2, and each pressure feeding tube 44 a, 45 a, 44 b, 45 b, 44 c, 45 c is inserted into the pipe, and a blade switching mechanism for each of the divided blades 3 a, 3 b, 3 c is inserted. 4 is connected to the pressure feed pipes 44a, 45a, 44b, 45b, 44c, and 45c of the compressor 40 provided on the rotating main shaft 1 through the corresponding electromagnetic valves 42 and 43, respectively.
Reference numeral 65 in FIG. 5 denotes a blade rotation bearing portion 65 that allows the blade 3 to rotate the blade 3 by 90 degrees from the horizontal direction to the vertical direction with respect to the blade shaft 2.
In addition, as shown in FIG. 7, it is preferable to incorporate the bearing 65a in the blade rotation bearing portion 65 so that the blade 3 can be smoothly rotated.

The control by the valve control unit 41 of each electromagnetic valve 42, 43 for each blade switching mechanism 4 is set so that the blades 3a, 3b, 3c rotate simultaneously or the rotation of each blade 3a, 3b, 3c. Set a slight time difference between the start and end of movement.
The time difference can be set so that, for example, the next blade is started when the rotation is completed with the sequential divided blades 3b and 3a from the outer divided blade 3c having a high moving speed.
The reason for providing such a time difference is to make the compressor 40 more compact by utilizing the limited compression capacity of the compressor 40 to a maximum of a plurality of locations.

As shown in FIG. 4, the compressor 40 and the solenoid valves 42 and 43 are surrounded by a sealed case 48 filled with air. In order to enhance the airtightness, the joint portion of the sealed case 48 is sealed with resin so that seawater, which is salt water, does not enter the sealed case 48 at all.
In FIG. 4, the sealing case 48 shows a mode in which a space filled with air is sealed with a container portion 48a and a lid portion 48b.

The structure of the rotary power unit that enables the blade 3 to rotate around the blade 3 attached to the blade shaft 2 and the center line y of the blade shaft 2 of the blade 3 has been described above. Rotates around the center line x, and a mechanism for operating the generator 22 by this rotation will be described.
As shown in FIG. 3, the generator fixing base 20 is fixed to the upper bearing portion 7 fixed to the upper horizontal frame 13 of the outer frame 9, and the generator is fixed to the rotating main shaft 1 of the rotating body K. The base 20 is rotatably mounted.
At that time, the generator fixing base 20 is provided with a rotation transmission portion 21 that transmits the rotation of the rotary spindle 1 to the generator 22.
A storage battery 37 is fixed to the generator fixing base 20, and the storage battery 37 and the generator 22 are connected by an electric wire 36 so that a part of the electricity generated by the generator 22 can be charged. .
The storage battery 37 is connected to the compressor 40, the tidal current direction sensor 46, the electromagnetic valves 42 and 43, and the valve control unit 41.

Further, in order to protect the parts from seawater which is salt water, a sealed case 49 is provided which surrounds the rotation transmitting portion 21 and the generator 22 and is filled with air.
In order to improve the airtightness of the airtight case 49 as well as the airtight case 48, the joint portion of the airtight case 49 is sealed with a resin so that seawater, which is salt water, does not enter the inside of the airtight case 49 at all. . In FIG. 3, an inner airtight case 34 fixed to the shaft mounting portion 38 of the generator fixing base 20 and an outer airtight case fixed to the generator fixing base 20 covering a part of the outer side of the inner airtight case 34. 35 shows a sealed case 49 that is covered twice.
Further, a seal is attached to the contact surface between the rotary shaft 1 such as the rotary main shaft 1 and the transmission shaft 26 and the sealing case 49, and the airtightness inside the sealing case 49 can be enhanced by applying grease.

As shown in FIG. 1, the outer frame 9 is non-rotatably anchored by a plurality of linear anchoring members 11 moored on the seabed G, and is fixed to the upper horizontal frame 13 of the outer frame 9 that does not rotate. The upper bearing portion 5 at the upper part of the rotating main shaft 1 is rotatably supported by the bearing portion 7. As shown in FIG. 3, a generator fixing base 20 is fixed to the upper bearing portion 7.
That is, the rotary spindle 1 is rotated by being pushed by the blade 3 that receives the tidal current around the center line x, but the generator fixing base 20 is fixed to the outer frame 9 and thus does not rotate.

As shown in FIG. 3, the rotation transmission unit 21 fixes the main gear 24 to the upper portion of the rotation main shaft 1 by a gear fixing portion 23, so that the main gear 24 can be rotated simultaneously by the rotation of the rotation main shaft 1. And
On the other hand, a generator 22 is provided on the generator fixing base 20, and a drive gear 28 is fixedly provided on a generator drive shaft 29 of the generator 22.
Transmission gears 25 and 27 are fixed to a gear transmission shaft 26 rotatably provided on the generator fixing base 20, and one transmission gear 25 is attached to the main gear 24 of the rotary main shaft 1. The other transmission gear 27 meshes with the drive gear 38, and the generator drive shaft 29 of the generator 22 is rotated by the rotation of the main gear 24. As a result, the rotation of the rotary main shaft 1 is changed to the power generation. The machine 22 will be operated.

In FIG. 3, the upper bearing portion 5 of the rotary main shaft 1 is supported on the upper shaft bearing portion 7 through the bearing 30 so as to be smoothly rotatable at the upper portion of the rotary main shaft 1, and the upper bearing portion. 7 shows a mode in which the shaft mounting portion 38 of the generator fixing base 20 fixed to the shaft 7 is supported by the upper bearing portion 5 of the rotating main shaft 1 so as to be smoothly rotatable via a bearing 31.
Further, reference numeral 32 in FIG. 3 is a cap 32 that covers the upper portion of the rotating main shaft 1, and reference numeral 33 is a fixing screw 33 for fixing the generator fixing base 20 to the upper bearing portion 7. Reference numeral 39 denotes a fixing screw 39 for fixing the upper bearing portion 7 to the upper horizontal frame 13 of the outer frame 9.

  In the present invention, since the compressor 40, the electromagnetic valves 42 and 43, and the valve control unit 41 use electricity, a storage battery 37 for storing electricity generated by the generator 22 is provided in the generator fixing base 20, A storage battery 37 is connected to the generator 22 by an electric wire 36.

The generator 22 is connected to an underwater power transmission line 91 for transmitting the generated electricity to the outside.
As shown in FIG. 1, the power transmission line 91 has a power transmission line guide rod 90 projecting to the side of the upper horizontal frame 13, and the power transmission line 91 is fixed to the tip of the power transmission line guide rod 90 so that the The power transmission line 91 can be prevented from being entangled with the blade 3, the blade shaft 2, or the like.

Next, the blade changing mechanism 4 will be described in detail.
The vane changing mechanism 4 enables the vane 3 to be rotated 90 degrees from the horizontal direction to the vertical direction by reciprocating the piston in the cylinder 50 by hydraulic pressure.
As shown in FIG. 4, the cylinder 50 of the blade switching mechanism 4 is connected to the compressor 40 via the pressure feeding pipes 44 and 45, and the electromagnetic valves 42 and 45 provided on the pressure feeding pipes 44 and 45, respectively. The valve control unit 41 that receives the signal sensed by the tidal direction sensor 46 at 43 is controlled to open and close and operates.
Examples of the hydraulic cylinder 50 that can be used in the blade switching mechanism 4 include an arc-shaped cylinder 51 shown in FIG. 6 and a cylindrical cylinder 81 shown in FIGS. 10, 11, and 12. The cylindrical cylinder 81 will be described later. Various aspects are possible.

Of the cylinders 50, first, an explanation will be given of a form in which an arc-shaped cylinder 51 is used.
6 to 9 are a perspective view and a cross-sectional view showing the form of the arc-shaped cylinder 51.
Arc-shaped piston heads 52a and 52b are mounted in the cylinder chambers 58 and 59 of the arc-shaped cylinder 51 so as to be able to reciprocate by rotating 90 degrees or more.
As shown in FIG. 6, oil liquid inlets and outlets 60 and 61 are formed in the cylinder heads 51a and 51b to inject the oil liquid into the cylinder chambers 58 and 59 on both sides of the piston heads 52a and 52b. The oil liquid is alternately pressed into the oil liquid inlet / outlet ports 60 and 61 through the liquid supply passages 62 and 63 from the pressure feeding pipes 44 and 45, and the oil liquid is discharged from the non-pressed side.
By this hydraulic control, the piston heads 52a and 52b can reciprocate in the cylinder chambers 58 and 59.

That is, when the blade 3 is horizontal, the piston head 52a is pushed by the oil liquid entering from one oil liquid inlet / outlet 60, so that one of the blade vertical cylinder chambers 58 is expanded, and the other oil chamber The oil liquid is discharged from the liquid inlet / outlet 61, and the other blade vertical cylinder chamber 59 is reduced.
When the blade 3 is vertical, as shown in FIG. 6, the piston head 52b is pushed by the oil liquid entering from the other oil liquid inlet / outlet 61. The oil liquid is discharged from one oil liquid inlet / outlet 60 and one of the blade vertical cylinder chambers 58 is contracted.
In this way, the piston 52 can reciprocate while rotating 90 degrees.

  As shown in FIGS. 8 and 9, the piston 52 and the blade 3 are arranged such that the blade fixing protrusion 55 is partly exposed from a part of the disk portion 52d that supports the piston 52, and the arc-shaped pin reciprocating hole is formed from the cylinder case 67 to the outside. By fixing a blade fixing portion 57 provided on the side of the blade 3 to a protruding portion protruding through 56 and projecting to the outside, the reciprocating motion of the blade 3 is achieved by rotating the piston 52 at an angle of 90 degrees. It becomes possible to move.

  As shown in FIG. 4, the oil liquid inlet / outlet ports 60, 61 are connected to the electromagnetic valves 42, 43 and the compressor 40 via the pressure feeding pipes 44, 45 from the liquid feeding paths 62, 63, and the blade 3 is rotated. The control is a valve control unit that receives the signal sensed by the tidal direction sensor 46 and opens and closes the electromagnetic valves 42 and 43 at a timing set to operate each blade 3 from the horizontal direction to the vertical direction. 41, the operation is executed every time the blade countershaft 2 rotates the rotary main shaft 1 by 180 degrees.

The structure of the arc-shaped cylinder 51 will be further described in detail.
As shown in FIG. 8, the arc-shaped cylinder 51 is surrounded by a shaft mounting portion 53 to the blade shaft 2 and disk-like cylinder cases 66 and 67, and a piston 52 bearing is provided between the cylinder cases 66 and 67. A disc-shaped piston 52 including a portion 52c, a disc portion 52d, and piston heads 52a and 52b is housed.
The cylinder cases 66 and 67 are fixed to the blade shaft 2 by the shaft attachment portion 53, and are further firmly fixed to the blade shaft 2 by the cylinder fixing portion 64.
As shown in FIG. 8, the bearing portion 52 c of the piston 52 can smoothly rotate in the cylinder cases 66 and 67 via the bearing 54 on the shaft mounting portion 53 of the cylinder 51 fixed to the blade shaft 2. To be fitted.

As shown in FIG. 9, the cylinder heads 51 a and 51 b have an arcuate cylinder chamber forming body 68 such as a prism that is circularly curved in the cylinder cases 66 and 67, and the cylinder chamber forming body 68. Formed on both side end surfaces.
8, reference numeral 69 denotes a screw hole 69 of the cylinder chamber forming body 68, reference numeral 70 denotes a screw hole 70 of the cylinder case 66, and reference numeral 71 denotes a fixing screw for fixing the cylinder chamber forming body 68 to the cylinder case 66. 71.
Reference numerals 72, 75, and 78 are screw holes, reference numerals 73, 76, and 79 are screw holes, and reference numerals 74, 77, and 80 are fixing screws. The fixing screws 74, 77, 80 are screwed to firmly fix the cylinder cases 66, 67 on both sides.

Next, the blade changing mechanism 4 in the form using the cylindrical cylinder 81 will be described.
As shown in FIGS. 10, 11, and 12, the blade switching mechanism 4 has a cylinder 81 and a piston 82 built in the cylinder 81 in a cylindrical shape.
In the cylindrical cylinder 81, the piston 82 reciprocates in the cylinder chambers 83a and 83b of the cylinder 81.
In this embodiment, the reciprocating of the piston rod 84 connected to the piston 83 causes the blade 3 to reciprocate at an angle of 90 degrees via any one or more of a crank, a gear, a belt, a wire, or a chain. The piston rod 84 and the blade 3 are linked so as to move.
10, 11, and 12, reference numeral 85 denotes a cylinder fixing body for fixing the cylinder 81 to the rotary spindle 1, and reference numeral 86 denotes a rod support for stably supporting the piston rod 84 on the rotary spindle 1. Part.

Among these, the aspect of the blade | wing change mechanism 4 incorporating the crank 87 is demonstrated.
In this embodiment, as shown in FIG. 9, when the piston rod 84 connected to the piston 82 reciprocates, the rod 84 is coupled to the rod 84 via a pivotal support 92, and the rod 93 reciprocates. The branch 94 reciprocates.
And if it provided in the blade | wing 3 by this reciprocation, the arm 95 pivotally supported by the arm 95 protruded from the rotating shaft 65 will rotate, and the blade | wing 3 will rotate.

Next, the aspect of the blade | wing change mechanism 4 incorporating a gear is demonstrated.
In this aspect, as shown in FIG. 10, a piston 82 built in a cylindrical cylinder 81 is connected to a piston rod 84, and a rack 96 is provided at the tip of the piston rod 84. When the rack 96 reciprocates, If the blade 3 is provided in this reciprocation, the pinion 97 provided on the rotating shaft 60 reciprocates to rotate the blade 3.

Furthermore, the aspect of the blade | wing change mechanism 4 incorporating the belt 98 is demonstrated.
In this embodiment, as shown in FIG. 11, a belt 98 is provided at the tip of a cylindrical cylinder 81 and a piston rod 74 connected to a piston 82 built in the cylinder 81, and when the belt 98 is pulled, a blade When the belt wheel 99 provided on the rotary shaft 60 rotates, the blade 3 connected to the belt wheel 99 rotates.
Thereafter, when the piston rod 84 is pushed and the belt 98 is loosened, the rotation of the rotary shaft 65 is returned by the force of the spiral return spring 100 and the blade 3 is rotated back to the original position.

In each of the cylindrical cylinders 81, as in the arc-shaped cylinder 51, as shown in FIGS. 9, 10, and 11, hydraulic injection into the cylinders 81 is performed by pressure feeding pipes 44 and 45. Are connected to the electromagnetic valves 42 and 43 and the compressor 40 via the directional flow sensor 46, receive the signal sensed by the tidal direction sensor 46, and at the timing set to operate each blade 3 from the horizontal direction to the vertical direction. It is controlled by a valve control unit 41 that opens and closes the valves 42 and 43.
That is, in any of the embodiments shown in FIGS. 9, 10, and 11, the rotation of the blade 3 is controlled by the valve control unit 41, and the blade countershaft 2 appropriately rotates the rotary main shaft 1 180 degrees each time. Will be activated.

  In the present invention, a plurality of mooring materials are anchored to the seabed with an anchor and installed in the sea. However, if the water depth is deep like the sea, it can be installed in a river.

DESCRIPTION OF SYMBOLS 1 Rotation main shaft 2 Blade | shaft shaft 3 Blade | wing 3a, 3b, 3c Split blade 4 Blade | wing change mechanism 5 Upper bearing part 6 Lower bearing part 7 Upper bearing part 8 Lower bearing part 9 Outer frame 10 Float 10a Disk-shaped box 11 Mooring material 12 Anchor 13 Upper horizontal frame 14 Lower horizontal frame 15 Outer vertical frame 16 Upper outer peripheral frame 17 Lower outer peripheral frame 18 Annular rail 19 Annular rail guide part 20 Generator fixing base 21 Rotation transmission part 22 Generator 23 Gear fixing part 24 Main gear 25 Transmission gear 26 Transmission shaft 27 Transmission gear 28 Drive gear 29 Generator drive shaft 30, 31 Bearing 32 Cap 33 Fixing screw 34 Inner airtight case 35 Outer airtight case 36 Electric wire 37 Storage battery 38 Shaft mounting portion 39 Upper horizontal frame fixing screw 40 Compressor 41 Valve control unit 42, 43 Solenoid valve 44, 45 Pressure feed pipe 46 Current direction sensor 47 Sensor receiving line 48, 49 Sealed case 50 Cylinder 51 Arc-shaped cylinders 51a, 51b Cylinder head 52 Arc-shaped pistons 52a, 52b Piston head 52c Piston bearing portion 52d Piston disk portion 53 Shaft attachment portion 54 Bearing 55 Blade fixing pin 56 Pin reciprocating hole 57 Blade Fixed portion 58 Cylinder chamber for blade vertical 59 Cylinder chamber for blade horizontal 60, 61 Oil liquid inlet / outlet 62, 63 Liquid feed path 64 Cylinder fixed portion 65 Blade rotary bearing portion 66, 67 Cylinder case 68 Cylinder chamber forming body 69 Screw hole 70 Screw hole 71 Fixing screw 72 Screw hole 73 Screw hole 74 Fixing screw 75 Screw hole 76 Screw hole 77 Fixing screw 78 Screw hole 79 Screw hole 80 Fixing screw 81 Cylindrical cylinder 82 Cylindrical piston 83a Cylinder chamber 83b Cylinder chamber 84 Piston rod 85 Cylinder fixed body 86 Rod Support section 87 Crank 88 Gear 89 Belt 90 Transmission line guide rod 91 Transmission line 92 Pivoting section 93 Crank arm 94 Pivoting section 95 Crank arm 96 Rack 97 Pinion 98 Belt 99 Belt wheel 100 Return spring K Rotating body x Rotating spindle centerline y Blade axis center line F Tidal current U Underwater G Undersea L Sea surface

Claims (9)

Tidal power provided with a rotary power unit composed of an outer frame stationary in the tidal current, a rotating body provided with blades that rotate in response to the tidal current in the outer frame, and a generator that operates by rotation of the rotating body A power generator,
The rotating body radially projects a plurality of blade shafts provided with the blades on a central rotation main shaft, and the blade shaft is directed upstream by a tidal direction sensor between the rotation main shaft and the blades. When it is detected that the blade is in the vertical state, when it is detected that the blade is directed downstream, the blade is in the horizontal state, and can be forcibly switched by reciprocation of the piston in the cylinder by the hydraulic pressure connected to the blade. Equipped with a vane changing mechanism
A tidal power generator, wherein the outer frame is rotatably supported by the main spindle.   The blade changing mechanism includes a hydraulic cylinder that changes blades, a piston inside the hydraulic cylinder, a compressor that is a pressure source for the cylinder, a pressure feeding pipe for oil that is provided between the compressor and the cylinder, an oil An electromagnetic valve provided in the pressure feed pipe so that the flow of liquid can be interrupted; a valve control unit for controlling opening and closing of the electromagnetic valve; a tidal direction sensor connected to the valve control unit; the compressor; the electromagnetic valve The tidal power generator according to claim 1, further comprising: a storage battery connected to a generator as a power source of the valve control unit.   The outer frame includes an upper horizontal frame having an upper bearing portion that supports the upper end portion of the rotating main shaft, a lower horizontal frame having a lower bearing portion that supports the lower end portion of the rotating main shaft, and the upper horizontal frame and the lower frame. The tidal power generator according to claim 1 or 2, wherein the tidal power generator is formed so as to surround each of the blades and the entire blade shaft with an outer vertical frame connected to the horizontal frame.   An annular rail centering on the center line is fixed to the tip of each blade shaft that is provided radially from the center line of the rotation main shaft, and the annular rail is constrained to move in the vertical direction from the outside to the outer vertical frame of the outer frame. The tidal current power generation device according to claim 3, further comprising an annular rail guide portion that is slidably supported in a circumferential direction.   A float having a low tidal resistance is provided at the upper part of the outer frame to float the entire apparatus by its buoyancy, and the upper part of a plurality of mooring members moored on the sea floor is fixed to the lower part of the outer frame to fix the outer frame in the tidal current The tidal power generator according to claim 1, wherein the tidal power generator is moored so as not to rotate.   The cylinder of the blade switching mechanism and the piston built in the cylinder form an arc shape, and the piston and the blade are connected so that the blade reciprocates horizontally and vertically at an angle of 90 degrees as the piston reciprocates. The tidal power generator according to claim 1, wherein the tidal power generator is provided.   A cylinder of the blade switching mechanism and a piston built in the cylinder form a cylindrical shape, and at least one of a crank, a gear, a belt, a wire, or a chain is formed by reciprocation of a piston rod connected to the piston. 6. The tidal power generator according to claim 1, wherein the piston rod and the blade are connected so that the blade is reciprocally rotated at an angle of 90 degrees horizontally and vertically.   The tidal power generator according to claim 1, wherein a blade provided on one blade shaft is divided into a plurality of blades, and each blade is provided with a blade switching mechanism. The installation area of the generator and the storage battery and the installation area of the compressor, the solenoid valve, and the valve controller are each covered with a sealed case, and the sealed case is filled with air. The tidal power generator described in 1.