JP6089314B2 - Hydroelectric generator - Google Patents

Description

  The present invention relates to a hydroelectric power generation apparatus that uses flowing water in rivers and waterways.

The present invention is a small-scale power generation device that utilizes the water pressure and flow velocity of water flowing in the middle basin of rivers and waterways. Some hydroelectric generators require large-scale investment, such as dam-type power generation and water channel-type power generation using elevation differences, but here we describe medium-scale power generation with many small-scale generators in mind. To do.
There is a power generation device (see Patent Document 1) that generates electricity by mooring a float in a river, disposing a screw at the bottom of the float, transmitting the rotation of the screw, and rotating a rotating shaft of a generator.
There is also a small hydroelectric generator (see Patent Document 2) that generates power regardless of fluctuations in water level by sinking a screw and a generator at the bottom of a natural river.

JP 2012-132386 A Utility Model Registration No. 3143189

The power generator described above has the following problems. It is a power generation device that can be used in deep waters where floats can float, and cannot be used in shallow waters. In order to place the screw in the target water stream (generally the central part of the fast water stream), a float occupying the water surface is required. Also, in rivers, water increases during the rainy season and typhoon, and water flows at an extremely high flow rate, so it is basically impossible to float an object (float) on the surface of the water flow.
The above-mentioned small hydroelectric generator has the following problems. Screws and generators are installed at the bottom of rivers and waterways, but the riverbed has slopes and irregularities. Since it is necessary to install the screw in the optimal direction with respect to the water flow, installation is time-consuming and time-consuming, and diving work requiring special equipment is required at deep water. Installing equipment in a fast stream with good power generation efficiency is not only difficult, but also dangerous. It is necessary to remove the generator in advance because the generator becomes an obstacle to running water at the time of river increase or the equipment is not flushed. In addition, once the river has increased and the device is taken out of the water stream, the power level is suspended for a week or two, since the device cannot be relocated for one or two weeks.

In a social sense, the power generation device requires permission and right to occupy the surface of the water. There are also landscape problems caused by water. Moreover, although the said small hydroelectric generator system is arrange | positioned in the riverbed of a river, it is necessary to consider beforehand as a foreign material which inhibits the flowing water of a river.

In order to solve the above problems, the hydroelectric generator of the present invention is
This is a device in which a generator body having a rotating shaft for power generation is installed outside a water flow, and a tip of the rotating shaft and a screw immersed in the water flow are connected by a universal joint. The screw shaft is configured to be capable of swinging the tip about the universal joint, and the rotation of the screw is transmitted to the rotary shaft via the universal joint.
Further, the hydroelectric generator is provided with a generator main body installed and fixed so that the rotating shaft is oriented in a direction substantially perpendicular to the water flow, and an auxiliary rotating shaft connected to the rotating shaft in a right angle direction through a gear.
In addition, a rotation-free wheel intended to prevent the screw blades from coming into contact with the side wall or river bed is mounted on a plane perpendicular to the screw axis so that the screw rotation is not obstructed even in shallow waterways or narrow trenches. A hydroelectric power generator was used.
Moreover, it was set as the apparatus which is in a water flow and the screw shaft approaches the direction of a water flow more as a screw shaft divided | segmented into plurality in series across the reverse rotation joint.
When installing the hydroelectric generator of the present application on the river bed, the screw is placed so as to be immersed in the water flow in the power generation trench provided on the river bed, and the generator body is installed on the generator recess provided on the river bed adjacent to the power generation trench. It is fixed so that the generator body does not hinder the river flow.

Since the present hydroelectric generator has the above-described configuration, the following effects can be obtained.
In the hydroelectric generator of the present invention, the generator body is disposed outside the water flow, and only the screw is disposed in the water flow. Since the tip of the screw can swing up and down and right and left by a universal joint, the screw shaft naturally faces the same direction as the water flow by the force of the water flow, and as a result, the screw can obtain an efficient rotational force from the water flow. Device. Further, since the screw shaft is bent at the universal joint portion, a larger portion of the screw can be immersed in the water flow.

For the reasons described above, the present hydroelectric generator has the following specific advantages.
-Without using a float, the screw can be placed in the target water stream with the long rotating shaft and universal joint of the generator body. Therefore, it does not occupy the surface of the water and has little influence on the waterside landscape.
・ Since no float is used, it is possible to generate electricity even in a shallow flow where only the screw is submerged, or in narrow waterways and trenches.
• The screw shaft is variable within the allowable range of universal joint angle change. Even if the generator main body is installed in a rough position (within the allowable range), the height and the direction, the screw shaft is oriented in the same direction as the water flow, so that the generator main body can be installed easily. For the same reason, it is not necessary to intentionally install the screw shaft in the direction of running water.
-Since the generator body is installed outside without being affected by water flow, it is not necessary to remove or move the generator body even when the river is flooded. Moreover, since the screw is connected by a universal joint, the tip of the screw can be easily lifted out of the water flow.
・ Because it is easy to pull up the screw from the water stream or put it into the water stream, it is easy to maintain and manage rivers and waterways. Further, the screw can be pulled up immediately before the water increase, and the screw can be returned to the water flow immediately after the water increase is completed, and power generation can be continued for a longer time.・ When installing the power generation device on the riverbed, place the device in the trench or recess. Therefore, the device of the present application does not become an obstacle to running water of the river, and it is not necessary to remove the device when the water increases.

Moreover, the following secondary effects can be obtained with the hydroelectric generator of the present invention.
The power generator of the present invention is an inexpensive power generator that can be used as an underwater generator by rotating a screw of a submersible pump that is inexpensive and already widely used as a general industrial product. And since it is a device of the grade which added the universal joint which is a simple and cheap connector, it is economical. Moreover, since the installation work of the generator body is easy and the positioning may be rough, there are many installation application places, and a large number of generators can be installed side by side. Fewer electric facilities and transmission lines are installed on land for the number of power generation devices, and efficiency is high.

Wind power generation using natural energy is unstable in wind direction and wind power. Solar power generation has drawbacks such as being unable to generate power at night or on cloudy days. The hydroelectric power generation device of the present invention is a device in which a screw is installed in the water flow, but since the generator main body is outside the water flow, the power generation can be continued relatively stably even during daytime and nighttime, when the water is rising. There is. Above all, the present device is a device that can extract energy comparable to a large windmill from a small screw by using a flow of water having a mass 1000 times that of air.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to the description of the embodiments, members and devices constituting the present invention will be described.

<Screw>
The screw 1 may be a known one having a plurality of screw blades 1b such as a propeller attached to the screw shaft 1a. Alternatively, a long blade such as a screw may be spirally attached to the screw shaft 1a.
The screw shaft 1a is preferably configured to be longer than the diameter of the turning circle of the screw blade 1b. By configuring the screw shaft 1a to be long, a larger part of the screw 1 can be immersed in the water flow in combination with the universal joint 3, regardless of whether the generator body 2 is fixed outside the water flow 11. The rear end (rotary shaft side end) of the screw shaft 1a is connected to a universal joint described separately.

<Wheel>
The wheel 4 includes a rim 4a, a spoke 4b, and a hub 4c like a front wheel of a bicycle. The hub, which is the center of rotation of the rim, is a screw shaft or a shaft that allows rotation around the screw shaft. The rim of the wheel may be configured to freely rotate in at least one direction on an orthogonal plane with respect to the screw shaft 1a. The diameter of the wheel 4 is configured to be larger than the diameter of the outer peripheral circle around which the screw blade 1b rotates.
The shape of the outer periphery of the wheel 4 may be circular or polygonal. The tip of the screw shaft 1a is optimal for the mounting position of the wheel 4 to the screw shaft 1a. However, a plurality of screw shafts 1a may be attached to the rear end or central portion.

Here, as shown in FIG. 6, it is preferable that the wheel has a plate shape instead of a rod shape, which is a member that connects the rotating shaft (hub) and the surrounding rim portion. The screw is fixed at the position of the universal joint (the rear end of the screw), and the tip of the screw swings in the water flow while the screw shaft rotates. The swinging sometimes swings up and down, left and right, or rotates the tip like a dog's tail.
Plate-like spokes act like a plane's horizontal and vertical wings, where the screw shaft moves straight in the water stream (in this case, the screw stops and water flows). In other words, the plate-like spokes that act as wings act so that the screw shaft is parallel to the direction of the water flow with the position of the universal joint as the fixed point, and the above-mentioned wasteful up / down / left / right and rotation swings as described above. It plays a role of decreasing. There may be three or more spokes radially around the hub. In this case, the wheel preferably has a structure that freely rotates in both the axial direction of the screw shaft and the opposite direction.

<Generator body>
The generator body may have a structure like a general submersible pump having a rotating shaft at the center of the motor. However, when the pump is used as a generator, the usage pattern is reversed. That is, the rotation of the screw rotates the rotation shaft at the center of the motor, and power generation is performed by electromagnetic induction of the magnet and the coil. In this case, it is preferable to change the shape of the screw and the number of blades so that the water flow (water pressure and flow velocity) can be captured more efficiently as a generator. Moreover, there may be a device that rotates the rotating shaft of the generator by changing the number of rotations of the screw as an auxiliary device.
That is, it can be said that the generator body of the present invention is a generator body that can be manufactured by a general submersible pump manufacturing technique with a proven waterproof function, efficiency, and durability, and can be manufactured in large quantities at a low cost.
There are various types and sizes of currently used submersible pumps. A suitable size for installing or removing the power generation device of the present invention with human power or a crane easily is about 10 to 100 centimeters in diameter of the screw. With this size, there are water channels and rivers in Japan where the screw of the hydroelectric generator of the present application is submerged.
In addition, when the generator main body is installed and used in the generator recess of the river bed integrated with the power generation trench which is a civil engineering work described in Example 5, the generator main body needs to be completely waterproof. . However, it is not difficult to use the waterproof technology of the conventional submersible pump.

<Universal joint>
The universal joint connects the generator's rotating shaft (or auxiliary rotating shaft) and the screw shaft in series, allowing the change of the angle of the two shafts freely (within the allowable angle change range of the universal joint), It is a joint that transmits rotational force.
Although a universal joint may be a well-known universal joint, since it is used in waterside or underwater, what is comprised with the raw material excellent in rust prevention property is good. An example of a universal joint is shown in FIGS. 7A and 7B. Also, as shown in FIG. C (universal joint of another form), one shaft of a single universal joint is connected to the tip of the rotating shaft, and the other shaft is connected to the rear end of the screw shaft. Good.

<Gear>
A gear that connects the rotary shaft and the auxiliary rotary shaft in a perpendicular direction may be a known gear.
For example, the gear may be a joint that transmits rotational force by disposing two bevel gears between a rotating shaft and an auxiliary rotating shaft of a generator and connecting the two shafts in a right angle direction.
In order to fix the angle and interval between the two rotating shafts and the bevel gear, and to ensure the lubricity and water resistance of the gear, the gear is preferably housed in a gear box. In the gear, it is possible to change the rotation speed of the rotary shaft and the auxiliary rotary shaft by changing the diameter and the number of teeth of the bevel gear.

<Reverse rotation joint>
The reverse rotation joint is a joint that transmits the rotational force of one screw shaft portion of the reverse rotation joint to the other screw shaft portion, and FIG. 9 shows an example of the reverse rotation joint.
Description of FIG. 9 FIG. 1 shows a cross-sectional view of a reverse rotation joint. When the forward rotation screw 1c on the input side rotates, the reverse rotation is transmitted to the reverse rotation screw 1d on the output side by the reverse rotation joint 6.
Description of FIG. 9 FIG. 2 is a diagram for explaining that the gear portion of the reverse rotation joint is disassembled and the rotation shafts on the input side and the output side rotate reversely. Arrows indicate the direction of rotation on the front side of each bevel gear. When the bevel gear fixed to the input side rotating shaft rotates in one direction, the bevel gear fixed to the output side rotating shaft reversely rotates via the auxiliary bevel gear. The reverse rotation joint may be a joint that transmits reverse rotation of another structure.
A screw blade is attached to the forward rotation screw so that the screw shaft rotates in the forward direction by the force of the water flow, and a screw blade is attached to the reverse rotation screw so that the screw shaft rotates in the reverse direction. Due to the presence of the reverse rotation joint, both screw shafts rotate in the reverse direction to each other and do not cancel out the rotational force, but serve to assist the rotational force. In other words, the reverse rotation joint is a reverse rotation connection in which the rotation of the forward rotation screw shaft connected by the universal joint is connected to the rotation shaft of the generator body that resists the rotation of the screw shaft, and the distal end is connected by the reverse rotation joint. The reverse rotation of the screw shaft portion is a joint that serves to assist the rotational force of the forward rotating screw.

<Power generation trench>
The power generation trench 7 is a trench for flowing river water provided on the riverbed of the river, and is a civil engineering workpiece that forms part of the hydroelectric power generation device of the present application. It is convenient to construct it in the lower part of the river where water flow is ensured even during the dry season. It is a civil engineering work that is submerged in running water when the river waters increase.
The power generation trench is preferably made of concrete at the bottom and side walls in order to ensure the strength that will not be destroyed when the river increases. The inner space of the power generation trench is more than the height and depth at which a predetermined screw can be inserted, and the cross-sectional shape of the trench is preferably rectangular or inverted trapezoidal so that cleaning and foreign matter removal can be easily performed. The longer the power generation trench extension, the better. The longer the power generation trench, the more power generation devices of the present application can be installed and the more efficiently used. If a concrete or metal fence or a net-like foreign material removal facility is provided at the inlet of the power generation trench, it is possible to prevent the intrusion of foreign materials that inhibit the rotation of the screw. Similarly, a fence or a net-like lid may be provided on the power generation trench.

<Generator recess>
The generator recess 8 is a recess that houses the generator body of the present invention, and is a civil engineering work made of concrete that is constructed on the river bed adjacent to the power generation trench. The generator body is installed and fixed in the generator recess so that the rotating shaft of the generator body protrudes into the power generation trench.
This generator recess is submerged at the time of river increase, but since it is a recess, the inside of the recess is outside the water flow, and the generator main body does not obstruct the water flow. If a lid made of concrete or metal is provided in the recess of the generator, there is no danger of people falling into holes when managing and using rivers and riverbeds.
The generator body 2 is preferably installed and fixed on the lid 8a of the generator recess. By opening the lid, the generator body can be taken out from the recessed portion of the generator where water has accumulated, and the generator body can be installed and fixed by fixing the lid to the lid and closing the lid. It is possible to avoid the difficult task of installing the generator body in the recessed portion where water has accumulated.

Electricity generated by the generator main body is transmitted to an electric facility on land by an electric cable, and measures such as storage and transformation are performed by a known electric device, and the electric power is transmitted to a power consuming facility or a commercial power system. Electrical cables should be routed in cable ducts. It can prevent damage from river runoff.
The cable box is used to maintain the functionality and waterproofness of the electrical cable connection by connecting the electrical cable from the generator body and the electrical cable in the cable duct within the cable box. The cable connection method may be used.

FIG. 1 is a diagram for explaining a first embodiment of the present invention, which is an explanatory diagram from a plane, a side surface, and a cross section. This will be described with reference to FIG.
The hydroelectric generator of the first invention of the present application is a generator body 2 having a power generation rotating shaft 2a installed and fixed outside the water flow 11, and the water flow 11 having screw blades 1b fixed to the screw shaft 1a. It is a hydroelectric generator comprised by the universal joint 3 which connects the screw 1 immersed in 1 and the front-end | tip of the said rotating shaft 2a, and the rear end of the said screw shaft 1a in series.
Then, the screw shaft 1a of the screw 1 is made swingable at the tip of the universal joint 3, and the rotation of the screw 1 is transmitted to the rotary shaft 2a via the universal joint 3. This is a hydroelectric power generation device.
As shown in FIG. 1, the hydroelectric generator of the present application has the generator body 2 installed and fixed outside the water flow 11. Therefore, the generator main body 2 does not hinder the water flow, and the power generation efficiency is not lowered without lowering the flow velocity. Moreover, there exists an advantage by which the generator main body 2 does not become an obstacle of the water flow at the time of water increase.
The screw 1 is arranged to be immersed in the water stream 11. The rear end of the screw 1 is fixed in position by the universal joint 3, but the front end can be swung up and down and left and right within an allowable angle change range 3a of the universal joint, and the screw shaft 1a can rotate. . When the screw 1 is immersed in the water flow 11 so that the windsock indicates the direction from the windward to the windward in the wind, the water flow 11 naturally pushes the screw blade 1b and the screw shaft 1a naturally has the direction 11a of the water flow. A force that tries to be parallel is applied. As a result, the screw 1 approaches the direction parallel to the water flow direction 11 a and is an apparatus that can obtain an efficient rotational force from the water flow 11.
Further, since the screw shaft 1a and the rotating shaft 2a are bent at the universal joint 3 portion, there is an advantage that more portions of the screw 1 can be immersed in the water flow 11. Moreover, by using the long rotating shaft 2a, the screw 1 can be arranged at a place where the water flow 11 is further away and the power generation efficiency can be increased.
Furthermore, the universal joint 3 allows the screw shaft 1a to be oriented in substantially the same direction as the water flow direction 11a for the reasons described above even when the generator body 2 is installed in a rough height or direction. That is, since the installation accuracy of the generator main body 2 can be allowed within the allowable range 3a of the angle change of the universal joint 3, there is an advantage that the generator main body 2 can be easily installed. Further, it is not necessary to install the screw 1 according to the direction of the water flow. There is a merit that the screw shaft can be arranged close to the direction parallel to the direction of the water flow by a simple operation of simply turning the screw around the universal joint into the water flow.

FIG. 2 is a plane explanatory view, a side explanatory view, and a cross section for explaining that the universal joint 3 is provided at the rear end of the screw so that the tip of the screw 1 can be pulled up and the screw 1 can be taken out of the water flow 11. It is explanatory drawing. When the wheel 4 is attached to the tip of the screw 1, it is possible to remove the screw from the water channel 11 b simply by lifting the wheel 4 from the water flow and placing it on the ground portion 14 by lifting the wheel 4. That is, it is a power generation device that does not become an obstacle when managing the water channel 11b at the time of water increase or cleaning the flow channel.

FIG. 3 is an explanatory diagram of another form of the power generator according to the first embodiment of the present invention. It is the plane explanatory view and side explanatory drawing showing the Example which employ | adopted the universal joint 3 for the connection of the screw shaft 1a and the screw shaft 1a. The arrangement of the screws follows the shape of the water channel in the vertical and horizontal directions, and a large axial rotational force can be obtained.

FIG. 4 is an explanatory diagram of the hydroelectric generator of the second invention of the present application.
In addition to the hydroelectric generator of the first invention, the hydroelectric generator of the second invention of the present application is installed and fixed to the generator main body 2 so that the rotating shaft 2a faces a direction substantially perpendicular to the water flow 11, and the rotating shaft An auxiliary rotary shaft 2b that is connected to the rotary shaft 2a and a gear 5 at a right angle is mounted between the universal joint 3a and the universal joint 3, and the tip of the auxiliary rotary shaft 2b and the rear end of the screw shaft 1a Is a hydraulic power generator characterized by being connected in series by a universal joint 3.
The fact that the rotating shaft 2a is oriented in a direction substantially perpendicular to the water flow 11 means that the approximate shortest distance is selected from the generator body 2 to the target water flow (the fast flowing portion), and the length of the rotating shaft 2a is minimized. There are advantages that can be made. By attaching the auxiliary rotating shaft 2b that is connected to the rotating shaft 2a and the gear 5 at a right angle and connecting the tip of the auxiliary rotating shaft 2b and the rear end of the screw shaft 1a in series with a universal joint, Similarly, the screw shaft 1a can constitute a device that naturally faces substantially the same direction as the water flow direction 11a.
This is a power generation device that is effective when the width of rivers and waterways is wide, or when the generator main body 2 can be installed on the shore, and because the generator main body 2 is on the land, there is an advantage that it can be easily maintained.
Here, in order to fix the position of the generator main body, the rotating shaft, and the gear, the reinforcing member 9a straddling the water channel is used. By using the reinforcing member, it is possible to install the generator main body on a waterway or a river shore where the installation conditions are worse.

As shown in FIGS. 1, 2, 3 and 4, the hydroelectric generator of the third invention of the present application includes a screw blade 1b on the screw shaft 1a in addition to the hydroelectric generator of the first or second invention. A rotation-free wheel 4 for preventing contact with a side wall or a river bed is mounted so as to be positioned on a plane orthogonal to the screw shaft 1a, and the wheel 4 has the screw shaft 1a as a central axis and the screw The hydroelectric generator has a radius larger than the turning radius of the blade 1b.
The wheel 4 functions as a spacer around the screw 1. Due to the presence of this wheel, the hydroelectric generator of the present application can generate power by rotating the screw 1 even in a shallow water flow in which the screw blade 1b is almost immersed in water or a narrow water channel in which the wheel 4 enters. . The wheel is free to rotate with respect to the screw shaft, and even if the wheel comes into contact with the river bed or the like and does not move, the screw can continue to rotate. Further, when the water depth is deep or the width of the water channel is wide, it is efficient to employ the plate-like spokes that serve as wings as the spokes 4b of the wheel 4 as described above. As described above, the plate-like spokes work in the same way as the horizontal and vertical wings of an airplane to suppress unnecessary screw shaft oscillation, and at the same time, make the screw shaft closer to the direction parallel to the direction of water flow. .

A hydroelectric generator according to a fourth invention of the present application is a hydroelectric generator equipped with the above-described reverse rotation joint in addition to the hydroelectric generator of the first, second or third invention. FIG. 8 is an explanatory view of a screw equipped with a reverse rotation joint.
The fourth hydraulic power generation device of the present application is a screw shaft 1a in which the screw shaft 1a is divided into a plurality of pieces in series with the reverse rotation joint 6 interposed therebetween. The reverse rotation joint 6 is a joint that transmits the rotational force of one screw shaft portion of the reverse rotation joint 6 to the other screw shaft portion of the reverse rotation joint. The screw blade fixed to the one screw shaft portion and the screw blade fixed to the other screw shaft portion are fixed to the screw shaft portion in a shape that reversely rotates each screw shaft portion by a water flow. This is a hydroelectric power generation device.
The screw 1 has a structure in which a rear end is fixed in position by a universal joint 3 but a tip freely swings. One screw shaft 1a rotating in one direction in the water flow 11 tends to be in a direction oblique to the water flow 11 although it is slightly. The reverse rotation joint 6 is a device that alleviates the tendency by dividing one screw 1 in series and connecting the forward rotation screw 1c and the reverse rotation screw 1d at an appropriate ratio. For example, if the forward rotating screw tries to tilt the screw to the left, the reverse rotating screw will try to tilt the screw to the opposite right. By making both the screws become one screw with the opposite tendency, it is possible to act to cancel each other's tendency. However, as described above, the shaft rotational forces do not cancel each other.
When the water depth or channel width is large, the slanting of the screw shaft is less efficient because the water flow force is not fully utilized. As described above, depending on the situation, the screw may swing up and down, left and right, or the tip may be rotated like a dog's tail. The reverse rotary joint 6 serves to suppress such a phenomenon. In addition, in public rivers and waterways, it is a device that measures to prevent the socially permissible water flow portion from sticking out by approaching the screw in the same direction as the water flow.

The hydroelectric generator of the fifth invention of the present application is a hydroelectric generator that uses the hydroelectric generator of the first, second, third, or fourth invention to make it possible to generate power even in the case of water increase in a river with a water level change. is there. FIG. 5 is a view for explaining a fifth embodiment of the fifth invention of the present application.
The hydroelectric generator of the fifth invention of the present application is arranged such that the screw 1 is immersed in the water flow 11 in the power generation trench 7 provided on the river bed, and the generator body 2 is provided on the river bed adjacent to the power generation trench 7. The hydroelectric power generator is characterized in that the generator main body 2 is installed and fixed in the concave portion 8 so as not to obstruct the water flow 11 of the river.
In the hydraulic power generation apparatus according to the fifth aspect of the present invention, the screw is housed inside the power generation trench provided in the river bed, so that it does not hinder the flow of the river. In addition, the generator body is located beside the power generation trench and is housed in the generator recess provided in the river bed, so that it does not hinder the flow of the river.
The device of the present application requires the construction of a civil engineering work such as a power generation trench and a power generator recess. However, these workpieces are much cheaper than civil engineering works of dam type power generators and water channel type power generators using a head. These civil engineering works of the present invention are works that can be easily constructed in the same manner as the dike, dam, and bank protection works that are river renovation works generally carried out during the dry and drought periods.
As described above, the durability and waterproofness of the generator body are industrial products that have been proven in submersible pumps, and there is no problem even if they remain in the water for a long time. The power generation trench can dig down the river bed to secure a water flow even in the dry season when the amount of water is low. Inspection of the generator body is easy by performing it during the dry season. In addition, when depositing sediment or foreign matter generated in the power generation trench, it is possible to easily clean the trench and remove foreign matter by lifting the tip of the screw.
The power generation device of the fifth invention of the present application composed of a screw, a power generation trench, a power generator main body, a power generator recess, and a universal joint can continue power generation throughout the day and night even in the river water increase period and the dry season with a small amount of water. It is possible and can be said to be an efficient device with a long operation time.
In addition, the power generation device of the present application is never seen under the surface of the water at the time of water increase. Even during the dry season, the generator body is hidden in the generator recess, and the screw is hidden in the generator trench. In addition, there is no need to float on the water surface of the river, so there are no problems such as occupation of the water surface or landscape.

  As described above, the hydroelectric generator of the present invention has a small individual generator main body and a small amount of power generation, but a large number can be installed side by side in one water channel or trench. Since a large number of generators can be installed in succession, electric cables, storage battery devices, power measuring devices and power transmission facilities can be consolidated, resulting in cost reduction. Also, maintenance efficiency is good.

The power generation device of the present invention uses unused energy such as the middle basin of rivers and the flow of irrigation water throughout the country. The mass of water is about 1000 times the mass of air, and if power is generated under the condition that the flow velocity and the wind speed are the same, it is a device that is one thousandth the size of a wind power generator currently installed on the coast or hills. It is a hydroelectric generator that can generate the same level of power.

Explanatory drawing of Example 1 of the electric power generating apparatus of this invention. Explanatory drawing of the utilization form of Example 1 of the electric power generating apparatus of this invention. Explanatory drawing of another form of Example 1 of the electric power generating apparatus of this invention. Explanatory drawing of Example 2 of the electric power generating apparatus of this invention. Explanatory drawing of Example 3 of the electric power generating apparatus of this invention. Explanatory drawing of a plate-shaped spoke. Explanatory drawing of a universal joint. Explanatory drawing of the screw equipped with the reverse rotation joint. Explanatory drawing of a reverse rotation coupling.

1: Screw 1a: Screw shaft 1b: Screw blade
1c: Forward rotating screw 1d: Reverse rotating screw 2: Generator main body 2a: Rotating shaft 2b: Auxiliary rotating shaft 3: Universal joint 3a: Permissible range of angle change of universal joint 4: Wheel 4a: Rim 4b: Spoke 4c: Hub 5: Gear 5a: Gear box 6: Reverse rotation joint 7: Power generation trench 8: Generator concave portion 8a: Lid of concave portion 9: Mounting base 9a: Reinforcement member 10: Electric cable 10a: Cable box 10b: Cable duct 11: Water flow 11a: Direction of water flow 11b: Water channel 12: River bed 13: Water surface 14: Above-ground part

Claims (1)

A generator body having a rotating shaft for power generation, fixed and installed in a generator recess provided in the river bed;
A screw having a screw blade fixed to a screw shaft, immersed in a water flow in a power generation trench provided on the river bed,
It is composed of a universal joint that connects the tip of the rotary shaft and the rear end of the screw shaft in series, and the rotation of the screw is transmitted to the rotary shaft via the universal joint,
The tip of the screw shaft of the screw can be swung around the universal joint,
Mounted on the screw shaft, a rotation-free wheel for the purpose of preventing the screw blades from coming into contact with the side walls and the riverbed so as to be positioned on a plane perpendicular to the screw shaft,
The wheel has a radius larger than the turning radius of the screw blade, with the screw shaft as a central axis.

Images