WO2010086958A1

WO2010086958A1 - Hydraulic power generation device

Info

Publication number: WO2010086958A1
Application number: PCT/JP2009/051271
Authority: WO
Inventors: 裕二海野
Original assignee: シーベルインターナショナル株式会社
Priority date: 2009-01-27
Filing date: 2009-01-27
Publication date: 2010-08-05
Also published as: JPWO2010086958A1

Abstract

Provided is a hydraulic power generation device which can efficiently generate electric power even with a relatively small current. A hydraulic power generation device (P1) includes a pair of waterwheels (3A, 3B) rotating reversely to each other disposed in the waterway (23) of a casing (2) provided on the bottom surface of a float (1). The rotation shaft (4A) of the waterwheel (3A) on one side is coupled with the input shaft of a speed-increasing device (5), the rotating shaft (4B) of the waterwheel (3B) on the other side is coupled with the gear body of the speed-increasing device (5), and the input shaft and the gear body of the speed-increasing device (5) are rotated reversely to each other on the same axis, whereby a driving force with a doubled speed increase ratio can be outputted from the output shaft of the speed-increasing device (5) to a generator (6).

Description

Hydroelectric generator

The present invention relates to a hydroelectric power generation apparatus that is installed in a river, an artificial irrigation channel, or the like, and generates power using the flow of water.

Conventionally, there has been known a hydroelectric power generation apparatus that generates power using a water drop by providing a weir in the middle of a water channel (see, for example, Patent Document 1). This hydroelectric power generator has an L-shaped draft tube with a water wheel installed in the water passage, and is arranged upstream of the weir plate to rotate the water wheel by the water flowing down the passage, and the rotational force is generated by the generator. It is comprised so that it may transmit to and may generate electric power.

Japanese Patent Laid-Open No. 11-30179

However, in the case of a hydroelectric generator using such a water drop, it is necessary to install a dam plate, an L-shaped draft tube, or the like in order to form a step in the middle of the water channel. In other words, in addition to installing a water turbine, a dedicated facility for power generation has to be laid, and there is a problem that the installation work is troublesome and the power generation cost increases.

Therefore, the present invention has been made to solve the above-described problems, and the object of the present invention is a hydroelectric power generation apparatus that can be easily installed without using a water drop, and in particular, a comparison. It is an object of the present invention to provide a hydroelectric power generation apparatus that can efficiently generate power even with a small water flow.

In order to achieve the above object, the present invention is a hydroelectric power generation device that generates electricity using a horizontally flowing water flow, a float that floats on the water surface, a bottom surface of the float, and a submerged state. A casing having a water channel penetrating from an upstream intake port toward a downstream drain port and a casing arranged opposite to each other in the width direction of the water channel of the casing, and reversely rotate with each other by the water flow passing through the central portion of the water channel A pair of water turbines, a pair of rotary shafts that are fixed to the rotation center of each water turbine in a standing posture in the depth direction, and whose upper end protrudes above the water surface via the float, and a rotary shaft that is connected to the rotary shaft and input A speed increaser that speeds up the output of the motor and a generator that is installed on the top surface of the float and that generates electric power using the driving force output through the speed increaser. Connected to the input shaft of the machine The drive shaft that doubles the speed increase ratio by rotating the other side of the rotation shaft to the gear body of the gearbox and rotating the input shaft of the gearbox and the gear body relatively on the same axis. Is output from the output shaft of the gearbox to the generator.

In the hydroelectric generator of the present invention, a planetary gear mechanism can be adopted as the speed increaser. The planetary gear mechanism includes a sun gear arranged at the center, a ring gear provided so as to surround the outer periphery of the sun gear, and both the outer gear of the sun gear and the inner gear of the ring gear arranged between the sun gear and the ring gear. A plurality of planet gears that mesh with each other and a planetary carrier that connects the planet gears together. Here, when the planetary gear mechanism is adopted for the speed increaser, the following structure is conceivable as a connection structure of the rotating shaft, the speed increaser, and the generator.

A. When using a generator (small generator) with a rated power of about 200 to 500 W One rotating shaft is connected to the planetary carrier via a power transmission mechanism, and the other rotating shaft is connected to the ring gear. The planetary carrier and the ring gear are rotated in reverse relative to each other on the same axis so that the driving force transmitted from the planet gear to the sun gear is output to the generator. A structure in which the generator is mounted vertically above the gearbox placed vertically on the float by connecting the shaft directly to the rotor of the generator

B. When using a generator (medium generator) with a rated power of about 5 to 10 kW One rotating shaft is connected to the planetary carrier via a power transmission mechanism, and the other rotating shaft is connected to the ring gear. The planetary carrier and the ring gear are rotated in reverse relative to each other on the same axis so that the driving force transmitted from the planet gear to the sun gear is output to the generator. A structure in which the generator is vertically installed on the side of the gearbox arranged vertically on the float by connecting the shaft to the rotor of the generator via a power transmission mechanism

C. When using a generator (large generator) with a rated power of about 100 to 200 kW One rotating shaft is connected to the planetary carrier via a power transmission mechanism and a bevel gear mechanism, and the other rotating shaft is powered by a ring gear. It is connected to the transmission mechanism and the bevel gear mechanism, and the output shaft of the gearbox is connected to the rotor of the generator via the power transmission mechanism. The generator is installed horizontally

Further, in the hydraulic power generation device of the present invention, the looseness-preventing gear in which the gear shaft slides in the long hole is brought into contact with the outer periphery of the drive chain or the drive belt constituting the power transmission mechanism, so that the drive chain or the drive belt A tension adjusting mechanism for adjusting the tension may be provided.

Further, in the hydroelectric generator of the present invention, when the water flow speed increasing portion for gradually decreasing the area of the opening end of the water intake port from the upstream side toward the downstream side is provided on the water intake side of the casing, Since the water flow taken in from the inside is compressed in the casing and the accelerated water flow passes through the water channel, it is preferable.

Further, in the hydroelectric generator of the present invention, when a turbulent flow suppressing portion that gradually increases the area of the opening end of the drain port from the upstream side toward the downstream side is provided on the drain port side of the casing, This is preferable because water flowing out from the water channel is released by the turbulent flow suppressing portion and turbulent flow generated in the peripheral portion downstream of the drain port is suppressed.

As the shape of the water wheel, a cross flow type or a turbine fan type can be adopted. The cross-flow type is one in which a plurality of curved plate-like blades are arranged side by side in the circumferential direction between the upper and lower disks fixed to the rotating shaft, and a gap through which water passes is provided between the blades and the rotating shaft. . According to this cross-flow type water wheel, water reliably passes through the gap between the blade and the rotating shaft, and the water passing through the gap pushes the blade on the rear side again to give a rotational force. It is suitable for installation in a relatively slow water flow of about 5 m / sec. On the other hand, the turbine fan type has a spiral groove formed on the outer periphery of a main body fixed to a rotating shaft. This turbine fan type turbine has no gap through which water passes, and has a higher strength than a cross-flow type turbine, and thus is suitable for installation in a fast water flow with a flow rate of 2.5 m / sec or more.

According to the hydroelectric generator of the present invention, the water flow is accelerated to increase the kinetic energy of the water, and the input shaft of the gearbox and the gear body are coaxially used by utilizing the rotations of the water turbines that are reversely rotated by the increased kinetic energy. By relatively rotating in the reverse direction, the driving force that doubles the speed increase ratio is output from the output shaft of the speed increaser to the generator. For this reason, even when installing in a slow water stream, it is not necessary to increase the gear ratio of the gearbox or increase the number of poles of the generator in order to increase the amount of power generation. And the cost can be reduced, and the power generation efficiency of the generator can be greatly improved.

Hereinafter, modes (first to third embodiments) for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
A hydroelectric generator according to a first embodiment is shown in FIGS. 1 is a perspective view showing the external appearance of the apparatus, FIGS. 2 and 3 are cross-sectional views showing the internal structure of the apparatus, FIG. 4 is a perspective view showing the main part of the apparatus, and FIG. FIG. 6 is an enlarged view of the speed increaser in the apparatus, FIG. 7 is a top view of the apparatus, and FIGS. 8 to 10 are partial sectional views of the apparatus.

As shown in FIG. 1, the hydroelectric generator P1 of the present embodiment is installed floating on an artificial waterway such as a river or an industrial waterway or an agricultural waterway, and converts the moving energy of water flowing in a substantially horizontal direction into electric energy. This is a float-type flowing water generator that generates electricity. This hydroelectric generator P1 is generally configured to include a float 1, a casing 2, a water wheel 3, a rotating shaft 4, a speed increaser 5, and a generator 6. Hereinafter, the structure of each part will be described in detail.

The float 1 is made of a hollow structure and is used for installing at least the speed increaser 5 and the generator 6 above the water surface. The float 1 is provided as a component for fixing to a structure placed on the river rim (land) of a river or an irrigation channel, or to another structure installed on the water. According to this hydroelectric power generation device P1, the installation is completed by a simple operation of simply fixing the float 1 floated on the water surface to the structure, so that it can be installed at a very low cost.

The casing 2 is formed by molding a plastic plate such as acrylic or a metal plate such as stainless steel into a substantially rectangular tube shape, and is fixed to the bottom surface of the float 1. The casing 2 is installed in a state where it is submerged in the flowing water, and has a water passage 23 penetrating from a water intake port 21 opened on the upstream side of the water flow toward a drain port 22 opened on the downstream side. By providing the intake port 21 in the casing 2 fixed to the bottom surface of the float 1 in this manner, it is always near the water surface (a position where the movement energy of water is maximized) without being affected by fluctuations in the water depth and water level of the river and the canal. The water flowing through the water can be taken from the water inlet 21.

As shown in FIG. 2, a water flow speed increasing portion 24 is provided on the intake port 21 side of the casing 2. The water flow speed increasing portion 24 is formed by integrally forming a tapered rectifying plate on the main body of the casing 2 so that the area of the opening end of the water intake 21 gradually decreases from the upstream side toward the downstream side. In the process of reaching the water channel 23 from the water intake 21, the water passage area is narrowed and compressed, and the inside of the casing 2 is brought into a pressure pipe state. As a result, the loss head (friction resistance) is reduced to a minimum by Bernoulli's theorem, the flow velocity V1 of water taken from the intake 21 is increased to the flow velocity V2, and the accelerated water flow passes through the water channel 23. ing.

A turbulent flow suppressing portion 25 is provided on the drain port 22 side of the casing 2. The turbulent flow suppression unit 25 is formed by integrally forming a tapered rectifying plate in the casing 2 main body so that the area of the opening end of the drain port 22 gradually increases from the upstream side toward the downstream side. Since the flow velocity of the water flowing through the water channel 23 in the casing 2 becomes larger than the flow velocity of the water flowing outside the main body of the casing 2 by the water flow speed increasing portion 24, if the two merge directly in the vicinity of the drainage port 22, it is caused by the speed difference. Turbulence may occur. Therefore, the water flowing out from the water channel 23 in the casing 2 is released by the turbulent flow suppression unit 25 and smoothly drained while the flow velocity V2 is reduced to the flow velocity V3, so that the water is generated in the peripheral portion downstream of the drain port 22. Turbulence is suppressed and the power generation flow rate can be adjusted.

A pair of water turbines 3 (3A, 3B) are accommodated in the water channel 23 in the casing 2. The water turbine 3 of the present embodiment has a vertical shaft type biaxial structure, and a pair of

water turbines

3A and 3B are arranged to face each other at a predetermined interval in the width direction of the water channel 23, and rotate reversely with each other by the water flow passing through the water channel 23. It is configured as follows. In order to rotate the water wheel 3, a rotation shaft 4 (4 A, 4 B) is fixed to the center of each of the water wheels 3 A, 3 B. As shown in FIG. 3, the rotary shaft 4 is provided in a posture standing in the water depth direction (vertical direction) in the water channel 23 of the casing 2, and the upper end portion projects through the through hole 11 of the float 1 and projects above the water surface. The lower end is rotatably supported by a bearing 41 on the bottom surface of the casing 2.

In the present embodiment, the shape of the water turbine 3 is a cross flow type. As shown in detail in FIG. 4, this cross-flow type water turbine 3 is a kind of drag type that directly receives water pressure and rotates. The upper and

lower disks

31, 31 are fixed to the rotating shaft 4, and the disk A plurality of curved plate-

like blades

32, 32,... Are arranged at equal intervals in the circumferential direction of the disk 31, and a gap 33 through which water passes is provided between the blades 32 and the rotating shaft 4. It is a thing. Accordingly, both

water turbines

3A and 3B rotate by receiving the pressure of water passing between the pair of

rotating shafts

4A and 4B by the curved surfaces 32a of the plurality of

blades

32, 32,. In FIG. 2, the water turbine 3A disposed on the left side rotates as the water flow having the maximum flow velocity passing through the center portion of the water channel 23 collides with the tip portions of the

innermost blades

32 and 32 of the two

water turbines

3A and 3B. The water turbine 3B arranged on the right side rotates about the axis 4B, and rotates in the direction of arrow S2 about the rotation axis 4B.

Further, in consideration of the rotational efficiency of the water turbine 3, the casing 2 is provided with a water flow restricting portion 26. The water flow restricting portion 26 is formed by bending the wall surface of the casing 2 in a curved shape so as to restrict the water flow flowing between the rotary shaft 4 and the casing 2 in the width direction of the water passage 23 of the casing 2. More specifically, a curved wall covering the outer half of each of the

water turbines

3A and 3B inside the casing 2 (in other words, rotating on both sides in the water channel 23 so that the cross flow type water turbine 3 does not rotate in the opposite direction. A curved wall having a shape surrounding a plurality of

blades

32, 32,... Located outside the

shafts

4A, 4B. For this reason, the course of the water flowing in the water channel 23 is regulated along the curved wall, whereby the pair of

water turbines

3A and 3B can efficiently rotate and a large rotational force can be obtained.

When the pair of

water turbines

3A, 3B rotates as described above, the rotational force is transmitted from the respective

rotating shafts

4A, 4B to the generator 6 via the speed increaser 5. Here, the hydroelectric power generation device P1 of the present embodiment accelerates the water flow to increase the kinetic energy of the water, and effectively uses the rotational force of the two-

shaft structure turbines

3A and 3B that are rotated in reverse by the increased kinetic energy. It is characterized in that the power generation efficiency of the generator 6 is improved by increasing the speed increase ratio of the speed increaser 5 by using the power generator. As a structure for this purpose, the pair of

rotating shafts

4A and 4B are not connected to the pair of

rotating shafts

4A and 4B separately, but the pair of

rotating shafts

4A and 4B are connected to one speed increasing device 5 as shown in FIG. I did it.

In FIG. 5, the speed increaser 5 increases the rotational speeds of the rotary shafts 4 A and 4 B input to the input shaft 51 to adjust to the rated rotational speed of the generator 6, and the driving force of the rotational speed is output to the output shaft 52. Output to the generator 6. More specifically, as shown in FIG. 6, the speed increaser 5 according to the present embodiment includes a planetary gear mechanism, and a sun gear 53 disposed in the center and a ring gear provided so as to surround the outer periphery of the sun gear 53. 54, a plurality of planet gears 55, 55,... That are arranged between the sun gear 53 and the ring gear 54 and mesh with both the outer teeth of the sun gear 53 and the inner teeth of the ring gear 54. The upper and lower

planetary carriers

56 and 56 to be connected are provided. The input shaft 51 is connected to the planetary carrier 56, and the output shaft 52 is connected to the sun gear 53.

Referring back to FIG. 5 and seeing the relationship between the rotary shaft 4 and the speed increaser 5, the left rotary shaft 4A is connected to the input shaft 51, and the right rotary shaft 4B is connected to the ring gear 54. In this embodiment, a power transmission mechanism 7 composed of a sprocket and a chain is adopted as the connection structure, and the sprocket 71 attached to the left rotating shaft 4A and the sprocket 71 attached to the input shaft 51 of the speed increasing device 5 are driven. The chain 72 is hung and connected, and the drive chain 72 is hung and connected to a sprocket 71 mounted on the right rotation shaft 4B and a gear portion 54a provided at the lower end of the ring gear 54. Instead of the power transmission mechanism 7 using the sprocket 71 and the chain 72, a power transmission mechanism using a pulley and a belt (not shown) may be employed.

Further, in order to reliably transmit the driving force of the rotating shaft 4 to the speed increaser 5, as shown in FIGS. 7 to 10, tension adjusting mechanisms 8 are provided for all the drive chains 72. The tension adjusting mechanism 8 includes a locking gear 81 and a long hole 82, and a gear shaft 81 a of the locking gear 81 is fitted in the long hole 82. For this reason, the tension of the drive chain 72 can be easily adjusted by sliding the gear shaft 81 a in the long hole 82 and press-contacting the locking gear 81 to the outer periphery of the drive chain 72.

Further, in FIG. 5, the speed increaser 5 and the generator 6 are connected by directly connecting the output shaft 52 of the speed increaser 5 to the rotor 61 of the generator 6. In the present embodiment, as shown in FIG. 1, the speed increaser 5 is vertically installed on the upper surface of the float 1, and the generator 6 is vertically placed thereon. Further, since the generator 6 is mounted on the speed increaser 5, the generator 6 (6A) of the present embodiment is a small one having a rated power of about 200 to 500W. Therefore, in this hydroelectric power generation device P1, since the power generation parts composed of the speed increaser 5 and the power generator 6 are installed above the water surface, the manufacturing cost can be reduced and the maintenance of these parts can be easily performed. Can do.

The hydroelectric generator P1 of the present embodiment is configured as described above. When a water flow passes through the water passage 23 in the casing 2, the pair of

water turbines

3A and 3B are opposite to each other about the

respective rotation shafts

4A and 4B. Rotate. Here, as shown in FIGS. 5 and 6, the left rotation shaft 4A rotates in the arrow S1 direction. At this time, the input shaft 51 of the gearbox 5 rotates in the same direction via the drive chain 72. The rotation is transmitted from the input shaft 51 to the planetary carrier 56. At this time, the right rotation shaft 4B rotates in the direction of the arrow S2 on the contrary, and the rotation is transmitted to the ring gear 54 of the speed increaser 5 through the drive chain 72. As a result, in the gearbox 5, the planetary carrier 56 and the ring gear 54 relatively rotate on the same axis and the driving force transmitted from the planet gear 55 to the sun gear 53 is transferred from the output shaft 52 to the rotor 61 of the generator 6. Is output.

Therefore, according to the hydroelectric generator P1 of the present embodiment, the speed increase ratio of the speed increaser 5 can be increased by the relative reverse rotation of the planetary carrier 56 and the ring gear 54 even when installed in a slow water flow. Is doubled, and the driving force output from the output shaft 52 to the rotor 61 of the generator 6 becomes extremely large. Therefore, it is not necessary to increase the gear ratio of the speed increaser 5 or increase the number of poles of the generator 6 in order to increase the amount of power generation. Efficiency can be greatly improved.

[Second Embodiment]
A hydroelectric generator according to a second embodiment is shown in FIGS. 11 is a perspective view showing the main part of the apparatus, FIG. 12 is a front view showing the operating principle of the apparatus, FIG. 13 is a top view of the apparatus, and FIGS. 14 to 16 are partial sectional views of the apparatus. In the present embodiment, the same components as those of the hydroelectric generator P1 of the first embodiment described with reference to FIGS. 1 to 10 are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 11, the hydroelectric generator P2 of the present embodiment is a medium-sized rated power of about 5 to 10 kW instead of the small generator 6 (6A) used in the hydroelectric generator P1 of the first embodiment. The generator 6 (6B) is used. When the medium generator 6B is used, its weight exceeds approximately 100 kg. Therefore, when the generator 6B is placed on the speed increaser 5 as in the first embodiment, the load on the speed increaser 5 is increased by the load. As a result, the gear does not rotate or in some cases the gear is crushed and breaks down, and the rotational force of the rotating shaft 4 (4A, 4B) cannot be transmitted to the generator 6.

Therefore, in this embodiment, the generator 6B is connected to the speed increaser 5 by a new power transmission mechanism 7. That is, as shown in FIGS. 11 to 16, the sprocket 73 is mounted on the output shaft 52 of the speed increaser 5 and the rotor 61 of the generator 6B, respectively, and the drive chain 74 is hung around the

sprockets

73 and 73 and connected. It is. As a result, the speed increaser 5 is vertically installed on the upper surface of the float 1, and the generator 6 B is vertically placed on the side of the speed increaser 5. The other structure is the same as that of the hydroelectric generator P1 of the first embodiment.

As described above, according to the hydroelectric generator P2 of the present embodiment, the generator 6B is arranged on the side of the speed increaser 5 without being placed on the speed increaser 5, thereby increasing the weight of the generator 6B. The speed machine 5 does not break down, and the rotational force of the rotating shaft 4 (4A, 4B) is reliably transmitted to the generator 6B via the speed increaser 5. Therefore, as in the first embodiment, the speed increase ratio of the speed increaser 5 is doubled by using the rotations of the

rotating shafts

4A and 4B that rotate in reverse directions, so that the power generation efficiency of the generator 6B can be improved. it can.

[Third Embodiment]
A hydroelectric generator according to a third embodiment is shown in FIGS. 17 is a perspective view showing the main part of the apparatus, FIGS. 18 and 19 are a front view and a side view showing the operation principle of the apparatus, FIG. 20 is a top view of the apparatus, and FIGS. It is a fragmentary sectional view. In the present embodiment, the same components as those of the hydroelectric generator P1 of the first embodiment described with reference to FIGS. 1 to 10 are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 17, the hydroelectric power generator P3 of this embodiment is a large-sized power having a rated power of about 100 to 200 kW instead of the small power generator 6 (6A) used in the hydroelectric power generator P1 of the first embodiment. The generator 6 (6C) is used. Such a large generator 6C usually has a weight exceeding 1 t, and of course cannot be placed on the speed increaser 5 like the medium generator 6B. In addition, the large generator 6C has an extremely high speed of rotation input to the rotor 61, and in many cases, the diameter is reduced and the length is increased in the axial direction in order to cope with the high speed rotation.

Therefore, in this embodiment, the speed increaser 5 is connected to the rotating shaft 4 (4A, 4B) by the power transmission mechanism 7 and the bevel gear mechanism 9, and the generator 6C is connected to the speed increaser 5 by the power transmission mechanism 7. By connecting, the generator 6C was placed horizontally.

More specifically, as shown in FIGS. 17 to 22, a drive chain 72 is wound around the sprocket 71 attached to the left rotating shaft 4A and the sprocket 71 attached to the input shaft 91 of the bevel gear mechanism 9 to The drive chain 72 is wound around the sprocket 71 attached to the input shaft 51 and the sprocket 71 attached to the output shaft 92 of the bevel gear mechanism 9. As a result, the left rotation shaft 4A and the input shaft 51 of the speed increaser 5 are connected to each other via the main driving gear 93 and the driven gear 94, which are bevel gears meshing with each other in the vertical direction.

Further, the drive chain 72 is hung around the sprocket 71 attached to the right rotation shaft 4B and the sprocket 71 attached to the input shaft 91 of the other bevel gear mechanism 9, and the drive chain 72 is attached to the gear portion 54a at the lower end of the ring gear 54. Hang around. As a result, the right rotation shaft 4B and the ring gear 54 of the speed increaser 5 are connected via the main drive gear 93 and the driven gear 94, which are formed by meshing the bevel gears in the vertical direction.

Furthermore, a drive chain 74 is wound around and connected to the sprocket 73 attached to the output shaft 52 of the gearbox 5 and the sprocket 73 attached to the rotor 61 of the generator 6C. Thus, the speed increaser 5 is horizontally installed on the upper surface of the float 1, and a generator 6 C is arranged on the side of the speed increaser 5 with the rotor 61 facing the horizontal direction. The other structure is the same as that of the hydroelectric generator P1 of the first embodiment.

Thus, according to the hydroelectric generator P3 of the present embodiment, when the left rotation shaft 4A rotates in the arrow S1 direction, the rotation of the vertical shaft transmitted from the drive chain 72 to the input shaft 91 of the bevel gear 9 is the main driving gear. 93 and the driven gear 94 are converted into rotation of the horizontal axis. Then, the rotation of the output shaft 92 of the bevel gear 9 is transmitted from the input shaft 51 of the gearbox 5 to the planetary carrier 56 via the drive chain 72. When the right rotation shaft 4B rotates in the direction of arrow S2, the rotation of the vertical shaft transmitted from the drive chain 72 to the input shaft 91 of the bevel gear 9 is converted into the rotation of the horizontal shaft via the main driving gear 93 and the driven gear 94. Is done. Then, the rotation of the output shaft 92 of the bevel gear 9 is transmitted to the ring gear 54 of the speed increaser 5 through the drive chain 72.

As a result, in the gearbox 5, the planetary carrier 56 and the ring gear 54 relatively rotate on the same axis and the driving force transmitted from the planet gear 55 to the sun gear 53 is transferred from the output shaft 52 to the rotor 61 of the generator 6. Is output. Therefore, as in the first embodiment, the speed increase ratio of the speed increaser 5 is doubled by using the rotation of the

rotating shafts

4A and 4B that rotate in reverse directions, so that the power generation efficiency of the generator 6C can be improved. it can.

In the embodiment described above, the cross flow type is adopted as the shape of the water turbine 3, but a turbine fan type as shown in FIG. 23 may be adopted instead. This turbine fan type water turbine 3 (3C, 3D) has a substantially spherical main body 34 like a lemon as a whole, and a spiral groove 35 is formed on the outer periphery of the main body 34 in order to improve the passage of water. Is.

In the cross-flow type water wheel 3 (3A, 3B) described above, the water surely passes through the gap 33 between the blade 32 and the rotary shaft 4, and the water passing through the gap 33 is the curved surface of the blade 32 on the rear side. Since 32a is pressed again to apply a rotational force, it is suitable for installation in a relatively slow water flow having a flow velocity of about 1 to 2.5 m / sec. On the other hand, when installed in a fast water flow with a flow velocity of 2.5 m / sec or more, a turbine fan type with an increased overall strength by eliminating a gap through which water can pass to withstand the fast flow. It is preferable to use a water wheel 3 (3C, 3D).

Since the hydroelectric generator of the present invention can obtain efficient power generation energy by using the kinetic energy of water flowing in the horizontal direction, the following various use cases and the effects thereof can be considered.
(1) Case of use in factory drainage energy saving effect by use of natural energy, CO2 countermeasures Effect of purchase of electricity by stable power generation (2) Case of use in agricultural waterway Independent power supply to places where electricity was not used ( 3) Use cases at water treatment facilities and power station discharge basins Creation of new industries and urban revitalization by effectively using waterways Creation of new businesses that make effective use of existing facilities, including PPP and PFI projects

It is a perspective view which shows the external appearance of the hydroelectric generator of 1st Embodiment. It is a cross-sectional view which shows the internal structure of the hydroelectric generator of FIG. It is a longitudinal cross-sectional view which shows the internal structure of the hydroelectric generator of FIG. It is a perspective view which shows the principal part of the hydroelectric generator of FIG. It is a front view which shows typically the operation principle of the hydroelectric generator of FIG. It is an enlarged view of the gearbox in the hydroelectric generator of FIG. FIG. 6 is a top view of FIG. 5. FIG. 6 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a sectional view taken along line BB of FIG. FIG. 6 is a cross-sectional view taken along the line CC of FIG. It is a perspective view which shows the principal part of the hydroelectric generator of 2nd Embodiment. It is a front view which shows typically the operation principle of the hydroelectric generator of FIG. FIG. 13 is a top view of FIG. 12. FIG. 13 is a sectional view taken along line AA in FIG. 12. FIG. 13 is a sectional view taken along line BB in FIG. 12. It is CC sectional view taken on the line of FIG. It is a perspective view which shows the principal part of the hydroelectric generator of 3rd Embodiment. It is a front view which shows typically the operation principle of the hydroelectric generator of FIG. It is a side view which shows typically the operation principle of the hydroelectric generator of FIG. It is a top view of FIG. FIG. 19 is a sectional view taken along line AA in FIG. FIG. 19 is a sectional view taken along line BB in FIG. It is a longitudinal cross-sectional view which shows the modification of the water wheel in a hydroelectric generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS P1 ... Hydroelectric power generation apparatus of 1st Embodiment P2 ... Hydroelectric power generation apparatus of 2nd Embodiment P3 ... Hydroelectric power generation apparatus of 3rd Embodiment 1 ... Float 11 ... Through-hole 2 ... Casing 21 ... Water intake 22 ... Drainage port 23 ... Water channel 24 ... Water speed increasing part 25 ... Turbulent flow suppressing part 26 ... Water flow restricting part 3 ... Water wheel 31 ... Disk 32 ... Blade 33 ... Gap 34 ... Body 35 ... Groove 4 ... Rotating shaft 41 ... Bearing 5 ... Speed increaser 51 ... Input shaft 52 ... Output shaft 53 ... Sun gear 54 ... Ring gear 55 ... Planet gear 56 ... Planetary carrier 6 ... Generator 61 ... Rotor 7 ... Power transmission mechanism 71 ... Sprocket 72 ... Drive chain 73 ... Sprocket 74 ... Drive chain 8 ... Tension adjusting mechanism 81 ... Loosening stop gear 82 ... Long hole 9 ... Bevel gear mechanism 91 ... Input shaft 92 ... Output shaft 93 ... Main drive gear 94 ... Subordinate Gear

Claims

A hydroelectric power generation device that generates electricity using a horizontal flow of water,
A float that floats on the surface of the water,
A casing provided on the bottom surface of the float and having a water passage penetrating from an upstream intake port toward a downstream drainage port in a submerged state;
A pair of water turbines arranged opposite each other at an interval in the width direction of the water channel of the casing, and reversely rotated by the water flow passing through the central portion of the water channel;
A pair of rotating shafts that are fixed to the rotation center of each turbine in a standing posture in the water depth direction, and whose upper end protrudes above the water surface via the float;
A step-up gear connected to the rotating shaft, which speeds up and outputs the rotation of the input rotating shaft;
A generator that is installed on the upper surface of the float and generates electric power by the driving force output via the gearbox,
The rotating shaft on one side is connected to the input shaft of the gearbox, and the rotating shaft on the other side is connected to the gear body of the gearbox, so that the input shaft of the gearbox and the gear body are relatively coaxial. A hydroelectric generator characterized in that, by rotating in the reverse direction, the driving force that doubles the speed increase ratio is output from the output shaft of the speed increaser to the generator.
The speed-up gear is composed of a planetary gear mechanism, one rotating shaft is connected to the planetary carrier via a power transmission mechanism, and the other rotating shaft is connected to the ring gear via a power transmission mechanism. The hydroelectric generator according to claim 1, wherein the driving force transmitted from the planet gear to the sun gear is output to the generator by relatively rotating the ring gear on the same axis.
The output shaft of the step-up gear is directly connected to the rotor of the generator, so that the generator is vertically mounted above the step-up gear arranged vertically on the float. Item 3. The hydroelectric generator according to Item 2.
The output shaft of the gearbox is connected to the rotor of the generator via a power transmission mechanism, so that the generator is installed vertically on the side of the gearbox placed vertically on the float. The hydroelectric power generator according to claim 2.
The gearbox consists of a planetary gear mechanism, one rotating shaft is connected to the planetary carrier via a power transmission mechanism and a bevel gear mechanism, and the other rotating shaft is connected to a ring gear via a power transmission mechanism and a bevel gear mechanism. The output shaft of the speed increaser is connected to the rotor of the generator via a power transmission mechanism, so that the generator is installed horizontally on the side of the speed increaser arranged horizontally on the float. The hydroelectric power generator according to claim 1, wherein
A tension adjustment mechanism that adjusts the tension of the drive chain or drive belt by bringing a locking gear that the gear shaft slides in the long hole into contact with the outer periphery of the drive chain or drive belt constituting the power transmission mechanism is provided. The hydroelectric power generator according to any one of claims 1 to 5, wherein the hydroelectric power generator is provided.
The water flow speed increasing portion for gradually decreasing the area of the opening end of the water intake port from the upstream side to the downstream side is provided on the water intake side of the casing. The hydroelectric generator according to item.
The turbulent flow suppressing portion for gradually increasing the area of the opening end of the drain port from the upstream side toward the downstream side is provided on the drain port side of the casing. The hydroelectric generator according to item.
The shape of the water wheel is a cross-flow type, and a plurality of curved plate-like blades are arranged side by side in the circumferential direction between the upper and lower disks fixed to the rotating shaft, and there is a gap through which water passes between the blade and the rotating shaft. The hydroelectric power generator according to any one of claims 1 to 8, wherein the hydroelectric generator is provided.
The hydroelectric generator according to any one of claims 1 to 8, wherein the turbine is of a turbine fan type, and a spiral groove is formed on an outer periphery of a main body fixed to a rotating shaft.