WO2019059177A1

WO2019059177A1 - Linear hydraulic power generation device

Info

Publication number: WO2019059177A1
Application number: PCT/JP2018/034460
Authority: WO
Inventors: 始後閑
Original assignee: 始後閑
Priority date: 2017-09-21
Filing date: 2018-09-18
Publication date: 2019-03-28
Also published as: PH12020500496A1; JP2019056363A; JP6442095B1

Abstract

Provided is a hydraulic power generation device with which, using the cross-flow water power of a river with a small fall, makes it possible to provide a facility having a desired size with respect to an arbitrary space. The linear hydraulic power generation device 100 comprises: a flow pathway 10 having a slope; a plurality of water wheels 80 arranged in the flow pathway 10; and a generator driven by means of the water wheels 80. The water wheels 80 include a rotating shaft 21, and a plurality of buckets 83 arranged in the circumferential direction of the rotating shaft 21. The flow pathway 10 has a water depth D10 which is more than or equal to twice a depth D80 at which the buckets 83 are immerged in running water. The water wheels 80 further include support plates on both sides in the width direction of the buckets 83. The support plates are respectively fixed to both sides in the width direction of the buckets 83. The water wheels 80 include running water rejection units 87 each disposed between two buckets 83 arranged adjacent to each other in the circumferential direction of the rotating shaft 21, the running water rejection units 87 extending between a radially inner end portion 83a of one bucket 83 and a radially outer end portion 83b of another bucket 83.

Description

Linear hydroelectric generator

[Related Art]
This application is related to Japanese Patent Application No. 2017-181769 filed with the Japanese Patent Office on September 21, 2017, and Japanese Patent Application No. 2018 filed on March 12, 2018 with the Japanese Patent Office. No. -044764, the entire disclosure of which is incorporated herein by reference.

The present invention relates to a linear hydroelectric generator. The linear hydroelectric power generation apparatus mainly utilizes water energy energy of a cross flow such as a river and a canal, and a plurality of turbines arranged at intervals in the extension direction of the water flow respectively have their respective generators. It is made to drive. In other words, in the linear hydroelectric power generation apparatus according to the present invention, a plurality of water turbine generators are arranged at intervals in the extension direction of the flow channel, and the electric power of each water turbine generator is integrated to produce integrated electric power. It is a row of continuous water flow generators.

In recent years, there has been a need for a hydroelectric device that is friendly to the global environment because of problems with safety (suppressing dangerous power generation such as nuclear power generation) and global warming. A conventional hydroelectric power generation apparatus utilizes stored water energy such as a dam, and rotates a water turbine by the drop of the stored water (see, for example, Patent Document 1).

JP 2001-172948

However, as described above, the conventional hydroelectric power generation system is a full-color hydroelectric generator, and is completely unrelated to the utilization of the crossflow water flow energy of the flowing water in order to generate power continuously by the flowing water. The That is, the conventional hydroelectric power generation apparatus mainly utilizes only the falling energy (potential energy) of the water power from a high place. For this reason, the conventional hydroelectric power generation device has a problem that the facility location of the hydroelectric power generation device is restricted to the vicinity of a dam having a large difference in elevation. Moreover, in the case of such a conventional hydroelectric power generation apparatus, high power generation capacity is mainly assumed. For this reason, the conventional hydroelectric power generation apparatus also has a problem that equipment required for the hydroelectric power generation apparatus increases in size. In addition, since such a conventional hydroelectric power plant is installed in a mountainous area, there is a problem that high voltage long distance power transmission is also required for the power transmission path.

An object of the present invention is to provide a hydroelectric power generator capable of a facility of a desired size for any space in various places with a low head.

A linear hydroelectric power generation apparatus according to the present invention comprises a water flow channel having a gradient and flowing water, a plurality of water wheels disposed in the water flow channel at intervals in the extension direction of the water flow channel, and the water wheel And a generator driven by each of the plurality of buckets, wherein the water turbine has a rotating shaft extending in the width direction of the water flow passage, and a plurality of buckets spaced in the circumferential direction of the rotating shaft. The water depth of the water flow passage is twice or more the depth at which the bucket is submerged in the water flow, or the amount of water passing through the water flow passage is two times the amount of water of the water flow blocking resistance of the bucket More than double.

Furthermore, in the linear hydroelectric power generation device according to the present invention, the water wheel further includes support plates on both sides in the width direction of the bucket, and the support plates are respectively fixed on both sides in the width direction of the bucket. The water wheel is a bucket auxiliary that extends from a radially inner end of one of the buckets or from the bucket toward the rotation shaft between two buckets disposed adjacent to a circumferential direction of the rotation shaft. It has a flowing water return portion extending between the radially inner end of the plate and the radially outer end of the other bucket.

The linear hydroelectric power generation apparatus according to the present invention utilizes cross flow energy of flowing water, which is based on the water power and amount of water flow. In order to operate a plurality of water wheels arranged at intervals in the extension direction of the water flow channel at the intervals, a water quantity of a depth twice or more the depth to which the buckets receive water pressure is secured below the bucket Use the water flow energy obtained by making the water flow of the said water flow below the water wheel, or the amount of water passing through the water flow channel secures at least twice the amount of water of the water flow blocking resistance of the bucket And utilizing the flow energy obtained by the flow of water flowing around the bucket. According to the linear hydroelectric power generation device according to the present invention, even if the water power of the entire water flow is reduced by the pressure receiving resistance of the bucket of the water turbine by rotating the water turbine, the bucket of the water turbine is flowing into the water In a water flow channel having a water depth twice or more the depth of the inundation, these become a combined flow power by the water flow force formed below the water turbine, the water flow channel between the water turbines, and the gradient of the water flow channel. Then, the water power reduced by rotating the water turbine one after another will increase again while flowing toward the next water turbine. As a result, from each generator disposed along the water flow passage, it is possible to take out equal amounts of power according to the flow passage and the flow rate.

In addition, according to the linear hydroelectric power generation device according to the present invention, by using a desired number of water wheels having buckets, it is possible to efficiently receive the water power of a water flow with a small head, and further, a river, a canal, etc. The synergetic effect of the "water volume" and the "water velocity" energy (kinetic energy) together with the continuous accumulation of electric power from the multiple generators can increase the power generation capacity. Therefore, according to the linear hydroelectric power generation apparatus according to the present invention, a facility of a desired size can be provided for any space in various places with a small head.

In addition, according to the linear hydroelectric power generation device according to the present invention, the flowing water return portion can at least partially close the gap formed between the buckets, so that the water enters the water wheel. It can be suppressed.

In the linear hydraulic power generator according to the present invention, preferably, the pressure receiving surface of the bucket is a pressure receiving surface curved in a semi-cylindrical shape in a fluid flow direction as viewed in the axial direction of the rotation shaft.

In the linear hydroelectric power generation device according to the present invention, the bucket may have a linear (planar) pressure receiving surface at a tip end portion of the bucket as viewed in the axial direction of the rotation shaft.

In the linear hydroelectric power generation apparatus according to the present invention, the flowing water return portion is connected to the radially inner end of the one bucket and the radially outer end of the other bucket, The gap corresponding to the flowing water return portion, which is formed between two buckets disposed adjacent to the circumferential direction of the rotation shaft, may be closed.

In the linear hydroelectric power generation apparatus according to the present invention, preferably, the water wheel further includes a bucket reinforcing portion that extends in the circumferential direction of the rotation shaft and integrally fixes the respective tips of the buckets.

In the linear hydroelectric power generation device according to the present invention, the water flow passage may have a fluid inflow blocking portion that blocks the inflow of fluid.

According to the present invention, it is possible to provide a hydroelectric power generation device capable of a facility of a desired size for any space in various places with a low head. Therefore, according to the present invention, a wide range of equipment is possible from large-capacity power supply to small-capacity power supply.

It is a top view of the linear hydraulic power unit concerning a 1st embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 2 is a front view showing FIG. 1 from the BB cross-sectional direction. It is CC sectional drawing of FIG. 2B. It is DD sectional drawing of FIG. 3A. It is a top view of the linear hydraulic power unit concerning a 2nd embodiment of the present invention. It is the figure which showed the linear hydroelectric power generating apparatus which concerns on 3rd Embodiment of this invention with the cross section equivalent to the BB cross section of FIG. It is the figure which showed the linear hydraulic power unit concerning the modification of the present invention by the section equivalent to the DD section of Drawing 3A. It is CC sectional drawing of FIG. 6A. It is the figure which showed the form of the bucket applicable to the water turbine of the linear hydraulic power unit which concerns on this invention by the cross section equivalent to the CC cross section of FIG. 2B. FIG. 7 is a front view showing a linear hydroelectric power generation device according to another modification of the present invention, as seen from the direction corresponding to the cross section BB of FIG. 1. It is CC sectional drawing of FIG. 8A. It is a modification of the linear hydraulic power unit concerning Drawing 8A, and is the sectional view showing the modification concerned in the section equivalent to the CC section of Drawing 8A. FIG. 8B is a cross-sectional view showing another modified example of the linear hydroelectric power generation apparatus according to FIG. 8A, as a cross section corresponding to the CC cross section of FIG. 8A. FIG. 8B is a further modified example of the linear hydroelectric power generation apparatus according to FIG. 8A, and is a cross-sectional view showing the modified example in a cross section corresponding to the CC cross section of FIG. 8A.

Hereinafter, linear hydroelectric power generation apparatuses according to various embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a linear hydroelectric power generation device 100 according to a first embodiment of the present invention.

In FIG. 1, reference numeral 10 is a water flow passage through which water (fluid) flows. The water flow path 10 takes in the water power of a water flow such as discharged water from a river, and allows water from a river or the like to flow while holding the water power over a long distance. The white arrow in FIG. 1 indicates the water flow direction. In the present embodiment, the water flow passage 10 extends linearly in a plan view (plan view) shown in FIG.

Moreover, in the present embodiment, as shown in FIG. 2A, the water flow passage 10 is a water flow passage having a slope. Here, the slope means an inclination (angle) θ with respect to the horizontal plane. In detail, the water flow passage 10 is installed so as to decrease at an angle θ from the upstream to the downstream of the water flow, as described later. The angle θ of the water flow passage 10 is, for example, 1 mmrad (milliradian) to 2 mmrad (milliradian).

Further, in the present embodiment, the water flow passage 10 is a water flow passage having a U-shaped (u-shaped) cross section in a front view of FIG. 2B. Specifically, as shown in FIG. 2B, the water flow passage 10 is formed in a U-shaped upward direction defined by a flat bottom wall 11 and two side walls 12 which rise upward from both widthwise ends of the bottom wall 11. Rectangular trough channel.

Furthermore, in the present embodiment, the water flow passage 10 is a prefabricated construction water flow passage. In detail, as shown in FIG. 1, the water flow passage 10 is manufactured as at least one water flow passage member (flow passage member), and is formed by assembling the member at a facility site. For example, the water flow passage 10 of FIG. 1 is a water flow passage formed as a single water flow passage member. The water flow passage member can be made of, for example, a material such as metal or concrete. The water flow passage 10 can be extended over a long distance by being connected and assembled as a plurality of water flow passage members.

Reference numeral 20 is a water wheel disposed in the water flow passage 10. As shown in FIG. 1 and the like, a plurality of water wheels 20 are disposed in the water flow passage 10 at intervals in the extension direction of the water flow passage 10. In the present embodiment, two water wheels 20 are disposed in one water flow passage 10. However, according to the present invention, when it is intended to take out a large amount of electric power, it is preferable that the number of water wheels 20 be more.

The water wheel 20 has a rotating shaft 21 extending in the width direction of the water flow passage 10. In the present embodiment, the rotation shaft 21 is rotatably supported on the side wall 12 of the water flow passage 10 via a bearing 22. The bearing 22 may be integrally formed with the side wall 12. The water wheel 20 has a width W 20 (hereinafter, also referred to as “water wheel width W 20”) extending in the width direction of the water flow passage 10. Moreover, as shown to FIG. 2A etc., the water turbine 20 has an outer diameter of diameter R20. The distance between the two water turbines 20 is a distance L20 between the centers of the two rotation shafts 21 (hereinafter, also referred to as “water turbine pitch length L20”). The inter-turbine pitch length L20 can be set in relation to the angle θ. For example, it is desirable that the inter-turbine pitch length L20 be a length that recovers to a constant flow velocity.

Further, the water wheel 20 has a plurality of buckets 23. As shown in FIG. 2B, the bucket 23 has a bucket width W23 extending in the extension direction of the rotary shaft 21, and has a pressure receiving surface for receiving water as described later. As shown in FIG. 3A, in the present embodiment, twelve buckets 23 are arranged at intervals in the circumferential direction of the rotary shaft 21 as viewed in the axial direction of the rotary shaft 21.

In the present embodiment, as shown in FIG. 3A and the like, the buckets 23 each have a pressure receiving surface 24 curved in the water flow direction in an axial view. In the present embodiment, the curved pressure receiving surface 24 is a pressure receiving surface that is curved in a semi-cylindrical shape in the water flow direction as viewed in the axial direction of the rotation shaft 21. In the present embodiment, the curved pressure receiving surface 24 has a radius of curvature r24.

Furthermore, in the present embodiment, as shown in FIG. 3A etc., the bucket 23 has a linear pressure receiving surface 25 at the tip end of the bucket 23 (radially outer end of the bucket 23) in the axial direction. There is. In detail, as shown in FIG. 3A, the pressure receiving surface 25 is configured by making the section from the tip of the curved pressure receiving surface 24 to the outermost diameter of the water wheel 20 linear in an axial view. Each of the linear pressure receiving surfaces 25 functions as a water scraping portion extending over the bucket width W 23 to receive the water power of the straight water flow along the water flow passage 10 together with the curved pressure receiving surface 24. It can be converted to a rotational force. Furthermore, each of the linear pressure receiving surfaces 25 functions as a guide surface as described later.

As shown in FIG. 3B, in the present embodiment, the water wheel 20 has a pressure receiving area S20 in which the water wheel 20 receives water. As shown in FIG. 3B, the pressure receiving area S20 of the water turbine 20 is a pressure receiving area when the bucket 23 reaches the lowest point in a front view of the water wheel 20. Specifically, the pressure receiving area S20 of the water wheel 20 is the product (S20 = D20 × W23) of the water immersion depth D20 of the water wheel 20 from the water surface F when the water wheel 20 is submerged, and the bucket width W23. In the present embodiment, the water immersion depth D20 of the water turbine 20 is equal to the water turbine radial direction length L23 of the bucket 23. Further, in the present embodiment, the flow passage area S10 of the flowing water passage 10 is the product (S10 =) of the depth D10 of the flowing water passage 10 and the width W10 of the flowing water passage 10 (hereinafter also referred to as "flowing water passage width W10"). D10 × W10). In the present embodiment, as described later, the water depth D10 of the water flow passage 10 is a depth at which the bucket 23 of the water turbine 20 is submerged in the water flow, and in the present embodiment, the water depth D10 is twice or more of the water immersion depth D20 of the water turbine 20.

Further, in the present embodiment, in the water depth D10 of the water flow passage 10, a region from the water surface F to the water immersion depth D20 of the water wheel 20 is a pressure receiving water flow layer. In the present embodiment, as shown by the area surrounded by the alternate long and short dash line in FIG. 3B, the flow passage area S10-2 of the pressure receiving water flow layer is the product of the flow channel width W10 and the water immersion depth D20 of the water turbine 20 (S10- 2 = W10 × D20). Furthermore, in the present embodiment, a region from the inundation depth D20 of the water wheel 20 to the bottom surface 10f of the water flow passage 10 is a water flow layer in which the water power of the water flow is not affected by the water wheel 20. In this embodiment, assuming that the depth of the remaining portion from the inundation depth D20 of the water wheel 20 to the bottom surface 10f of the water flow path 10 with respect to the water depth D10 (hereinafter, also simply referred to as “remaining depth”) is Df. As shown by the area surrounded by the broken line, the flow passage area S10-1 of the water flow layer is the product (S10-1 = W10 × Df) of the flow channel width W10 and the remaining depth Df. That is, in the present embodiment, the flow passage area S10 of the water flow passage 10 is the sum of the flow passage area S10-2 of the pressure receiving water flow layer and the flow passage area S10-1 of the water flow layer. Furthermore, in the water flowing through the flowing water channel 10, the volume of the water flow layer (hereinafter also referred to as "water flow layer volume") that travels downstream through the flow channel area S10-1 of the water flow layer is the water flow. It is the product of the flow passage area S 10-1 of the layer and the length in the extension direction of the flowing water passage 10. The flooded flow layer volume integral serves as a volume when the flow passage area S10-1 of the flooded flow layer travels downstream, and increases the flow power. In the water flowing through the flowing water channel 10, the volume of the pressure receiving water flow layer (hereinafter also referred to as "pressure receiving water flow layer volume"), which proceeds downstream through the flow channel area S10-2 of the pressure receiving water flow layer, is the pressure receiving water flow. It is the product of the flow passage area S10-2 of the bed and the length in the extension direction of the water flow passage 10. In addition, in FIG. 3B, the area surrounded by the dashed-dotted line and the area surrounded by the broken line are described smaller than the actual size in order to avoid overlapping with the outline of the other part.

Furthermore, in the present embodiment, the water wheel 20 further includes a bucket auxiliary plate 27 extending from the bucket 23 toward the rotation shaft 21. In detail, as shown in FIG. 3A, the bucket auxiliary plate 27 is configured in a linear shape extending toward the rotation shaft 21 in an axial direction. In the present embodiment, the bucket auxiliary plate 27 is configured integrally with the bucket 23. As shown in FIG. 3A, one surface of the bucket auxiliary plate 27 (the same surface as the curved pressure receiving surfaces 24 and 25) can also function as the auxiliary pressure receiving surface 26. In the present embodiment, as shown in FIG. 3A, the bucket auxiliary plate 27 forms an annular gap S with the rotary shaft 21 in the axial direction. The gap S functions as a hole for escaping droplets from the water surface F. Further, the gap S can suppress the resistance of the air (wind) received by the water wheel 20 while the water wheel 20 is rotating. Thus, the gap S can also exhibit the function of ensuring the efficient rotation operation of the water wheel 20.

Moreover, in this embodiment, as shown to FIG. 3B etc., the water turbine 20 further has the support plate 28 in the width direction both sides of the bucket 23. As shown in FIG. The two support plates 28 are respectively fixed to both sides in the width direction of the bucket 23. In the present embodiment, the support plates 28 are respectively disk-shaped plate members. In the present embodiment, the support plates 28 are respectively welded to the widthwise ends of the buckets 23. Further, in the present embodiment, as shown in FIG. 3B, the two support plates 28 are respectively fixed to both sides in the width direction of the bucket auxiliary plate 27 by a method such as welding similarly to the bucket 23. In the present embodiment, the bearing 22 is interposed between the rotating shaft 21 of the water wheel 20 and the support plate 28, but the bearing 22 can be omitted.

In addition, as shown in FIG. 3A etc., in the present embodiment, the water wheel 20 further includes a bucket reinforcing portion 29 which extends in the circumferential direction of the rotating shaft 21 and integrally fixes the respective tips of the buckets 23. ing. The bucket reinforcing portion 29 may be, for example, a piano wire or a steel wire which goes around the circumferential direction of the rotating shaft 21. In the present embodiment, as shown in FIG. 2B, the bucket reinforcing portion 29 is provided at one location at the center of the bucket width W23. However, a plurality of bucket reinforcing portions 29 can be provided at intervals in the direction of the bucket width W23. In the present embodiment, as shown in FIG. 3A, the bucket reinforcing portion 29 has a circular shape in the axial direction but may have a polygonal shape in which the tip end of the bucket 23 is linearly connected.

Moreover, as shown to FIG. 2B, the linear hydroelectric power generation apparatus 100 has the generator 30 driven by the water mill 20. As shown in FIG. In the present embodiment, the generator 30 is drivably coupled to the rotation shaft 21 of the water wheel 20 via the power transmission device 40. The power transmission device 40 transmits the rotational force and rotational speed of the water wheel 20 to the generator 30.

In the present embodiment, the power transmission device 40 is a belt type power transmission device. Specifically, the power transmission device 40 includes an input pulley 41 fixed to the rotation shaft 21 of the water wheel 20, an output pulley 42 fixed to the input rotation shaft of the generator 30, and the input pulley 41 and the output pulley 42. It has a V-belt 43 stretched between them. In this embodiment, by making the input pulley 41 and the output pulley 42 variable pulleys, the rotational force and the rotational speed input to the generator 30 can be appropriately changed. Further, according to the present invention, a fluid such as a lockup torque converter is provided between at least one of the rotary shaft 21 of the water wheel 20 and the input pulley 41 and between the output pulley 42 and the input rotary shaft of the generator 30. A joint can be interposed. Further, according to the present invention, the power transmission device 40 can be replaced with a belt-type power transmission device to be a chain-type power transmission device. When the power transmission device 40 is a chain type instead of the belt type, power transmission efficiency is improved as compared with the belt type. In particular, in the case of the gear chain type, the rotational force and the rotational speed input to the generator 30 can be appropriately changed by changing the gear.

As shown in FIG. 2A, in the present embodiment, when the diameter R20 of the water wheel 20 is 1000 mm, the water velocity V of the water intake 10a of the water flow passage 10 is 3 to 5 m / s. Further, in the present embodiment, the angle θ of the water flow passage 10 is preferably set to 1 mmrad (milliradian) to 2 mmrad (milliradian). If the angle θ is more than that, the flow of water can be maintained. The numerical values of the angle θ are exemplary. According to the present invention, the numerical value of the angle θ can be appropriately changed. For example, the angle θ may be 1 ° to 2 °.

In the present embodiment, specific dimensions, structures, etc. of the length, size, depth (water depth), inclination, etc. of the water flow channel 10 are the “water volume”, “water velocity”, It can be determined by “power generation plan (electric power production plan)”.

Further, as shown in FIGS. 3A and 3B, in the present embodiment, the water depth D10 of the water flow passage 10 needs to be twice or more the water depth of the water immersion depth D20 of the water wheel 20. In this case, in the water depth D10 of the water flow passage 10, a region from the water surface F to the water immersion depth D20 of the water turbine 20 is a pressure receiving water flow layer to which the water turbine 20 receives water power. The region up to the bottom surface 10 f of the water flow is a water flow layer in which the water power of the water flow is not affected by the water wheel 20. In the present embodiment, the water depth D10 of the water flow passage 10 is 550 mm, the immersion depth D20 of the water turbine 20 is 250 mm, and the remaining depth Df is 300 mm. Note that these numerical values are exemplary. According to the present invention, these numerical values can be changed as appropriate.

As shown in FIG. 3A, in the present embodiment, the diameter R20 of the water wheel 20 is 1000 mm. The curvature radius R24 of the curved pressure receiving surface 24 of the bucket 23 is 125 mm. The extension length L25 of the linear pressure receiving surface 25 of the bucket 23 is 50 mm. Furthermore, the water pump radial direction length (length of the pressure receiving surface 26) L27 of the bucket auxiliary plate 27 is 50 mm. Moreover, as shown to FIG. 3B, in this embodiment, the water wheel width W20 is 1000 mm. Note that these numerical values are also illustrative. According to the present invention, these numerical values can also be changed as appropriate. For example, the number of buckets 23 can be ten. In addition, it is preferable that the bucket width W23 be equal to or greater than one measure (about 303 mm).

In the present embodiment, the number of water wheels 20, the arrangement interval, etc., the axial length of the rotation shaft, the size (diameter), the shape, etc. of the bucket 23 (curved pressure receiving surface 24, linear pressure receiving surface 25) Number, size (radial length, axial width), shape, etc., as well as specific dimensions, structures, etc., “water volume” of the water flow passage 10, “water speed”, “power generation plan (electric power production plan)” It can be determined by

Further, in the present embodiment, the rotational speed of the generator 30 is 200 to 300 rpm. Further, as shown in FIG. 1, in the present embodiment, the generator 30 is connected to both sides of the water wheel 20, but can be connected to only at least one side. Further, as shown in FIG. 2B, in the power transmission device 40, the pulley ratio of the input pulley 41 and the output pulley 42 is set to 3 to 5. Note that these numerical values are also illustrative. According to the present invention, these numerical values can be changed as appropriate. Furthermore, the generator 30 can be directly connected to the rotating shaft 21 of the water wheel 20 or indirectly connected via a lockup torque converter.

In the present embodiment, the specific dimensions, structures, etc. of the number, size, output power, shape, etc. of the generators 30 are also included in the “water volume”, “water velocity”, “power generation plan (electric power Production plan) can be determined.

As shown in FIG. 3B, in the linear hydroelectric power generation device 100 according to the present embodiment, the flow passage area S10 of the water flow passage 10 is twice or more the pressure receiving area S20 of the water turbine 20. The value of "more than 2 times" is a value obtained experimentally to obtain appropriate water power. In this case, even if the water power of the entire water flow is reduced due to the receiving resistance (pressure receiving resistance) of the bucket 23 of the relevant water turbine 20 by rotating the water turbine 20, the water content does not move toward the next water turbine 20. While flowing, the water power obtained by the gradient of the water flow channel 10 and the water power of the water flow (water flowing through the aquifer flow layer) of the water depth portion not directly related to the rotation of the water turbine 20 directly are synthesized. For this reason, the water power reduced by rotating the water wheel 20 one after another will increase again while flowing toward the next water wheel 20. Thereby, from each generator 30 arrange | positioned along the water flow path 10, the large and small equal electric power according to the river (water flow path) and water quantity (flow volume) can be taken out.

Specifically, as shown in FIG. 3B, the water depth D10 of the water flow passage 10 is twice or more the water depth of the water immersion depth D20 of the water turbine 20 from the water surface F when the water turbine 20 is submerged. In this case, in the water flow passage 10 having a water depth D10 at least twice the inundation depth D20 of the water turbine 20, a water depth portion not directly related to the water turbine 20 below the water turbine 20 (in this embodiment, the remaining depth Df The water flow of the region's aquifer flow layer) and the water flow of the water flow obtained by the gradient of the flow passage 10 while flowing along the flow passage 10 are combined.

Further, according to the linear hydroelectric power generation apparatus 100 according to the present embodiment, by using a desired number of water wheels 20 having the buckets 23, the water power of the water flow can be efficiently received, and furthermore, the river and the waterway The combined effect of “water volume” and “water velocity” energy (kinetic energy), etc. and continuous accumulation of electric power from multiple generators can increase power generation. Therefore, according to the linear hydroelectric power generation apparatus 100 according to the present embodiment, the length of the water flow channel, for example, according to the "water volume", "water velocity", and "power generation plan (electric power production plan)" , Size, depth (water depth), inclination, etc., number of water wheels, arrangement interval, etc., axial length of rotary shaft, size (diameter), shape, etc., number of buckets (pressure receiving surface), size (diameter) By appropriately setting the direction length, the axial width), the shape, etc., a facility of a desired size can be obtained for any space of various places with a small head. Therefore, according to the linear hydroelectric power generation device 100 according to the present embodiment, a wide range of equipment is possible from the supply of a large amount of power to the supply of a small amount of power.

In particular, as shown in FIG. 3A, in the linear hydroelectric power generation device 100 according to the present embodiment, the water wheel peripheral water flow volume VL can be five times or more of the water wheel flooded volume (water force resistance volume) VW. In the present embodiment, as shown by the region surrounded by the broken line in FIG. 3A, “the water flow volume around the water wheel VL” means “the water flow volume between the diameters of the water wheels among the water flow volumes around one water wheel” Say Moreover, in this embodiment, as shown by the area | region enclosed with the dashed-dotted line of FIG. 3A, "hydraulic water immersion volume VW" means "the volume of the water turbine submersed in the water in a water flow path." That is, in the present embodiment, the “length in the extension direction of the water flow passage 10” in the “water wheel peripheral water flow volume VL” is “the diameter R20 of the water wheel 20”. In this case, regardless of the water resistance of the water mill 20, the next water mill 20 can be driven continuously. In the present embodiment, when the distance between the water turbines 20 (water turbine pitch length L20) is 1 m, the plurality of water turbines 20 disposed from upstream to downstream rotate continuously and easily. In FIG. 3A as well, the area enclosed by a broken line and the area enclosed by a one-dot chain line are written smaller than they actually are in order to avoid overlapping with the outlines of other parts.

Moreover, in the linear hydroelectric power generation device 100 according to the present embodiment, as shown in FIG. 3A, the pressure receiving surface 24 of the bucket 23 is curved in a semi-cylindrical shape toward the water flow direction as viewed in the axial direction. It is a face. In this case, since the curved pressure receiving surface 24 of the bucket 23 receives the water power of the water flow more efficiently, the power generation capacity can be further increased.

Further, in the linear hydroelectric power generation apparatus 100 according to the present embodiment, as shown in FIG. 3A, the bucket 23 has a linear pressure receiving surface 25 at the tip of the bucket 23 in the axial direction. In this case, immediately after the bucket 23 enters the water, the linear pressure receiving surface 25 of the bucket 23 serves as a guiding surface and can efficiently guide the water to the bucket 23 along the flow of the water flow, thereby further increasing the power generation. It can be done.

Further, in the linear hydroelectric power generation device 100 according to the present embodiment, the water wheel 20 further includes a bucket auxiliary plate 27 extending from the bucket 23 toward the rotation shaft 21 of the water wheel 20. In this case, as described later, the pressure receiving surface 26 of the bucket auxiliary plate 27 receives the water power of the water flow together with the bucket 23, whereby the power generation capacity can be further increased.

Further, in the linear hydroelectric power generation device 100 according to the present embodiment, as shown in FIG. 3B and the like, the water turbine 20 further has the support plate (support disc) 28 on both sides in the width direction of the bucket 23 28 are respectively fixed to the width direction both sides of the bucket 23. In this case, since the rigidity of the entire water turbine 20 is increased, it is possible to improve the durability of the water turbine 20 and, in turn, the durability of the entire linear hydroelectric power generation apparatus 100. In addition, since the rigidity of the entire water turbine 20 is increased, the water turbine 20 is structurally stable. Thereby, since the water mill 20 rotates more efficiently, power generation capacity can be increased more.

Further, in the linear hydroelectric power generation device 100 according to the present embodiment, as shown in FIG. 2B and FIG. 3A etc., the water wheel 20 extends in the circumferential direction of the rotating shaft 21 and is fixed to each tip of the bucket 23 It further has a bucket reinforcing portion 29. In this case, since the rigidity of the entire water turbine 20 is increased, it is possible to improve the durability of the water turbine 20 and, in turn, the durability of the entire linear hydroelectric power generation apparatus 100. In addition, since the rigidity of the entire water turbine 20 is increased, the water turbine 20 is structurally stable. Thereby, since the water mill 20 rotates more efficiently, power generation capacity can be increased more.

Moreover, as shown in FIG. 1, in the linear hydroelectric power generation device 100 according to the present embodiment, the water flow passage 10 is a prefabricated construction water flow passage. The prefabricated construction flow channel 10 can be formed by manufacturing the flow channel in advance as at least one flow channel member and assembling the component at a facility site. In this case, the assembly and disassembly of the water flow passage 10 makes it possible to install and remove the water flow passage 10. In particular, as described later, if an inflow blocking facility such as a water gate is installed at the water intake 10a of the water flow passage 10, the facility location is a disaster area under circumstances such as typhoon, heavy rain, abnormal weather, etc. In addition, safety can also be ensured, since the intake can be easily and quickly released from the disaster area by controlling the intake.

Next, referring to FIG. 4, a linear hydroelectric power generation apparatus 200 according to a second embodiment of the present invention will be described. In the following description, portions substantially the same as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The linear hydroelectric power generation device 200 according to the present embodiment includes two linear hydroelectric power generation devices, a first linear hydroelectric power generation device 200A and a second linear hydroelectric power generation device 200B. The first linear hydroelectric power generation apparatus 200A and the second linear hydroelectric power generation apparatus 200B are respectively configured by two water flow channels of a first flow channel 10A and a second flow channel 10B. In the present embodiment, each of the first water flow passage 10A and the second water flow passage 10B is a water passage which takes in the water power of the water flow such as the discharged water from the river. In the present embodiment, each of the first water flow passage 10A and the second water flow passage 10B extends linearly in a plan view shown in FIG. 4 similarly to the water flow passage 10 of the first embodiment.

In the present embodiment, the first water flow passage 10A is a water passage having a water flow passage width W10A of 2000 mm. In the present embodiment, the first water flow passage 10A has a fluid inflow blocking portion 15 that blocks the inflow of water. The fluid inflow blocking unit 15 can interrupt the inflow of water manually or by electric control or the like. When the facility location is designated as a disaster area under conditions such as a typhoon, heavy rain, abnormal weather, etc., the fluid inflow blocking unit 15 shuts off the first water flow passage 10A, thereby safety of the first linear hydroelectric power generation apparatus 200A. Secure the sex. In the present embodiment, the fluid inflow blocking unit 15 is an openable / closable lock provided at the intake port 10 a of the first water flow passage 10A. Further, in the present embodiment, the obstacle exclusion facility 16 is provided at the water intake port 10a of the first water flow path 10A. The obstacle removal facility 16 is a facility for preventing foreign matter and the like from interfering with a water wheel or the like. Examples of the obstacle removal facility 16 include a protective net that captures foreign matter such as wood and stone.

Further, in the present embodiment, in the first water flow passage 10A, a plurality of identical water turbines 20A are arranged at intervals in the extending direction of the first water flow passage 10A. In the present embodiment, the water turbine 20A has an inter-water turbine pitch length L20 of 5000 mm in the extending direction of the first water flow passage 10A. Further, in the present embodiment, the water wheel 20A is a water wheel having 22 buckets 23. In the present embodiment, the diameter R20 of the water turbine 20A is 1000 mm as in the first embodiment, but the water turbine width W20 is 1600 mm. Furthermore, in the present embodiment, the water depth D10A of the first water flow passage 10A is at least twice as large as the water immersion depth D20 of the water turbine 20 from the water surface F when the water turbine 20A is flooded, as in the first embodiment. Although it is water depth, in the present embodiment, the water depth D10 of the first water flow passage 10A is 800 mm.

Further, in the present embodiment, the second water flow passage 10B is also a canal with a water flow passage width W10B of 2000 mm. In the present embodiment, a fluid inflow blocking portion 15 is provided at the intake port 10a of the second water flow passage 10B as in the first linear hydroelectric power generation apparatus 200A. When the facility location is designated as a disaster area under conditions such as a typhoon, heavy rain, abnormal weather, etc., the fluid inflow blocking unit 15 also shuts off the second water flow passage 10B, thereby safety of the second linear hydroelectric power generation apparatus 200B. Secure the sex. Further, in the present embodiment, the obstacle exclusion facility 16 is provided also in the water intake port 10a of the second water flow passage 10B.

Furthermore, in the present embodiment, a plurality of

different water turbines

20A, 20B, 20C, 20D and 20E are disposed in the second water flow passage 10B at intervals in the extending direction of the second water flow passage 10B. In the present embodiment, each of the

water mills

20B, 20C, 20D and 20E is a water mill having 22 buckets 23 like the water mill 20A. In the present embodiment, the diameter R20 of the

water turbines

20B, 20C, 20D and 20E is 1000 mm as in the first embodiment, but the water wheel width W20 is 1200 mm, 1000 mm, 600 mm and 400 mm. In particular, in the present embodiment, the water mill 20E is two water mills arranged at an interval WS. In the present embodiment, the distance WS is 1000 mm. According to the water wheel 20E, the central region of the flow channel width W10B of the second flow channel 10B can be effectively used. Furthermore, in the present embodiment, the water depth D10B of the second water flow passage 10B is also twice or more than the water immersion depth D20 of the water turbine 20B from the water surface F in the water submerged state of the water turbine 20A as in the first embodiment. Although it is water depth, in the present embodiment, the water depth D10 of the second water flow passage 10B is also 800 mm. In addition, said numerical value is an exemplary numerical value based on the result of experimenting in each river, for example.

Further, in this embodiment,

different water mills

20A, 20B, 20C, 20D and 20E are disposed in the second water flow course 10B of the same water flow path width W10B, but these

water mills

20A, 20B, 20C, 20D and Each 20E can be used alone. For example, the water wheel 20C can be disposed at an interval on one middle water river (water flow channel) as a middle water river wheel. Also, for example, the water wheel 20D can be disposed at an interval on one small amount of river (water flow path) as a small amount of water for a small amount of river. That is, according to the present embodiment, it is possible to provide a hydraulic power generation apparatus having a water wheel width suitable for the canal according to the amount of water of the river.

In the present embodiment, the first linear hydroelectric power generation apparatus 200A includes a plurality of current collectors 50 corresponding to the respective generators 30. Similarly to the first linear hydraulic power generation device 200A, the second linear hydraulic power generation device 200B also has a plurality of current collectors 50 corresponding to the respective generators 30. In the present embodiment, the electricity extracted from the generators 30 is collected by the current collectors 50 corresponding to the respective generators 30. In the present embodiment, after the electricity collected by the first linear hydroelectric power generation apparatus 200A and the second linear hydroelectric power generation apparatus 200B is sent to the simplified power plant, the electricity is collected via the step-up transformer or the like in the simplified power plant. It is distributed to various places through transmission lines.

Further, as a modified example of the present embodiment, the second water flow passage 10B can be a water flow passage in which the water flow passage width W10B tapers as the water flow passage width W10B goes from upstream to downstream in the plan view of FIG. . In this case, the water velocity of the second water flow passage 10B becomes faster as the water flow passage width W10B becomes narrower from upstream to downstream. For this reason, when the water flow passage width W10B becomes narrow, if the

water mills

20A, 20B, 20C, 20D and 20E are sequentially arranged as going from the upstream to the downstream as in the second water flow passage 10B of FIG. Similar to the passage 10B, power can be taken out evenly from the respective generators 30 arranged along the flowing water passage.

Next, referring to FIG. 5, a linear hydroelectric power generation apparatus 300 according to a third embodiment of the present invention will be described. In the following description, portions substantially the same as those of the other embodiments are denoted by the same reference numerals, and the description thereof is omitted.

In the linear hydroelectric power generation device 300 according to the present embodiment, the water wheel 60 is used as the plurality of water wheels disposed in the water flow passage 10. In the present embodiment, the water wheel 60 has two water wheels 20 arranged in parallel in the width direction of the water flow passage 10. In the present embodiment, the rotation shaft 61 of the water wheel 60 is a rotation shaft in which the rotation shafts 21 of the two water wheels 20 are integrally formed. The rotation shaft 61 of the water wheel 60 is rotatably supported via a bearing 22 with respect to a reinforcing support 17 which stands from the bottom wall 11 of the water flow passage 10. Thereby, the water wheel 60 can simultaneously rotate integrally the two water wheels 20 by rotation of the rotating shaft 61. In this case, a large pressure receiving area S23 of the bucket 23 can be secured without increasing one bucket width W23 (water wheel width). Further, in this case, since the central portion in the length direction (water flow channel width direction) of the rotating shaft 61 is supported by the reinforcing support column 17, it is possible to suppress bending or the like occurring in the rotating shaft 21. In the present embodiment, the bucket auxiliary plate 27 connects the rotating shaft 61 and the bucket 23. In the present embodiment, the gap S of the bucket auxiliary plate 27 is configured as an opening formed in the bucket auxiliary plate 27. It is preferable to use a compound water wheel such as the water wheel 60, for example, in a large water flow channel having a water flow channel width W10 of 2 m or more.

Next, a linear hydroelectric power generation apparatus 400 according to a modification of the present invention will be described with reference to FIGS. 6A and 6B. In the following description, portions substantially the same as those of the other embodiments are denoted by the same reference numerals, and the description thereof is omitted.

In the linear hydroelectric power generation apparatus 400 according to this example, it is assumed that the water depth D10 of the water flow passage 10 is shallow and the water depth D10 of the water flow passage 10 can not secure a water depth of twice or more of the water immersion depth D20 of the water turbine 20. Example. In this example, when the water flow is small, the lateral width (waterway width W10) of the water flow passage 10 is enlarged by that amount to compensate for the insufficient flow rate of the water flow force of the water flow.

As shown in FIG. 6A and the like, in the linear hydroelectric power generation apparatus 400 according to this example, the width direction gap ΔS70 between the side wall 12 of the water flow passage 10 and the water wheel 70 is We secure widely. As a result, the amount of water is increased to secure the water power. The flow passage area S10 of the water flow passage 10 can be made twice or more the pressure receiving area S70 of the water wheel 70 by adjusting the width direction gap ΔS70. That is, the amount of water passing through the water flow passage 10 can be twice or more the amount of water of the water flow blocking resistance of the bucket 23. In this case, the water flow passage 10 can be applied to, for example, a shallow agricultural water passage.

In detail, the bottom width W11 of the water flow passage 10 is a width that can sufficiently ensure the width direction gap ΔS70 between the water flow passage 10 and the water wheel 70. In this case, even if the water power of the entire water flow is reduced due to the receiving resistance of the bucket 23 of the water wheel 20 by rotating the water wheel 70, the water power may flow while flowing toward the next water wheel 70 , The flow of water obtained by the gradient of the water flow channel 10 and the flow of water not directly contributing to the rotation of the water turbine 70 on both sides of the water turbine 70 (the flow channel area from which the pressure receiving area S70 of the water turbine 70 is removed (S10 The water power of the water flow) is combined. For this reason, the water power reduced by rotating the water wheel 70 one after another will increase again while flowing toward the next water wheel 70. As a result, even in the linear hydroelectric power generation apparatus 400 according to the present embodiment, it is possible to take out equal amounts of power, which are large and small, according to the river and the amount of water from the generators 30 arranged along the water flow passage 10. In this example, assuming that the width WF of the water surface F, the flow channel area S10 of the water flow channel 10 is {(width WF of water surface F) + (bottom width W11 of water flow channel 10)} × D10 / 2. Moreover, in this example, the pressure receiving area S70 of the water wheel 70 is the sum of the pressure receiving area S23 of the bucket 23 and the pressure receiving area S27 of the bucket auxiliary plate 27 (S70 = S23 + S27).

Specifically, the water depth D10 of the water flow passage 10 is 230 mm, and the diameter R70 of the water wheel 70 is 600 mm. Further, while the water wheel width W70 of the water wheel 70 is 250 mm, the bottom width W11 of the water flow passage 10 is 400 mm. Thus, 75 mm is secured as a width direction gap ΔS 70 between the side wall 12 of the water flow passage 10 and the water wheel 70. The water immersion depth D70 of the water wheel 70 is 180 mm. Further, a diameter L27 of the bucket auxiliary plate 27 in the water turbine radial direction is 30 mm. Therefore, the water turbine radial direction length L23 of the bucket 23 is 150 mm obtained by dividing the water turbine radial direction length L27 of the bucket auxiliary plate 27 from the water immersion depth D70 of the water turbine 70. Note that these numerical values are exemplary. According to the present invention, these numerical values can be changed as appropriate.

Moreover, as shown to FIG. 6B, in this example, the bucket 23 of the water wheel 70 is eighteen pieces. Further, as shown in FIG. 6B, the curved pressure receiving surfaces 24 of the buckets 23 are directed to the bucket 23 of the water wheel 20 in the water flow direction in the circumferential direction of the rotary shaft 21 as viewed in the axial direction of the rotary shaft 21. Curved with a radius of curvature R24 that is greater than the radius of curvature of. In the present example, the linear pressure receiving surface 25 is omitted. The water wheel used in this example is not limited to the water wheel 70. As a water mill used by this example, the above-mentioned water mill 20 grade | etc., Can be used, for example.

Here, with reference to FIG. 7, the form of the bucket 23 applicable to the water turbine of the linear hydroelectric power generation apparatus which concerns on this invention is demonstrated. In the following description, portions substantially the same as those of the other embodiments are denoted by the same reference numerals, and the description thereof is omitted.

FIG. 7 shows two variations of the pressure receiving surface of the bucket 23 in one drawing. First, as shown by the reference numeral 24 'in FIG. 7, in the first variation, as viewed in the axial direction of the rotary shaft 21, the circumferential direction of the rotary shaft 21 with respect to a straight line radially extending from the rotary shaft 21 of the water wheel 20. The pressure receiving surface 24 'is curved in the water flow direction. Next, as shown by reference numeral 25 ′ ′ in FIG. 7, in the second variation, the circumference of the rotary shaft 21 with respect to a straight line radially extending from the rotary shaft 21 of the water wheel 20 in the axial direction of the rotary shaft 21. It is trapezoidal trapezoidal pressure receiving surface 25 'which is recessed toward the water flow direction. In the present embodiment, the trapezoidal pressure receiving surface 25 'is configured by a straight line. Therefore, a part of the trapezoidal pressure-receiving surface 25 ′ functions as a linear pressure-receiving surface 25.

By the way, in each of the above-mentioned water turbines, for example, as described with reference to FIG. 3A, the bucket auxiliary plate 27 forms an annular gap S with the rotation shaft 21 in the axial direction. The bucket auxiliary plate 27 forms an opening A27 between each other in the circumferential direction. Each of the openings A 27 communicates the gap S to the outside. Thereby, the gap S functions as a hole for escaping the splash splashed from the water surface F when the water wheel 20 is rotated.

However, according to the test and research, when the water power of the water flow is large, for example, when the water velocity V is 6 m / s or more, the inventor 20 receives the resistance in the reverse direction to the rotation direction of the water wheel 20 and rotates. It came to recognize that the speed would not increase. Then, as a result of further intensive studies and researches, the inventor of the present invention has confirmed that one of the causes that the rotational speed of the water turbine 20 does not increase is the water expelled from the bucket 23 of the water turbine 20.

Specifically, when the water velocity V is 6 m / s, on the downstream side of the water turbine 20, the water expelled from the bucket 23 is scattered as a large amount of droplets. In particular, when the immersion depth D20 of the bucket 23 is deep, for example, when the bucket 23 is 250 mm or more, the amount of splashes scattered to the downstream side of the water wheel 20 is large. In addition, when the inundation depth D20 of the bucket 23 is deep, a large amount of droplets rotate around the water wheel 20 and scatter on the upper upstream side of the water wheel 20. The large amount of droplets scattered to the upper upstream side of the water wheel 20 in this manner suppresses the rotation speed of the water wheel 20 and prevents the rotation speed of the water wheel 20 from increasing.

As a result, according to the rotation of the water wheel 20, although a rotation speed (for example, 90 rpm) sufficient as the power generation rated rotation speed of the generator 30 can actually be obtained, the rotation speed higher than that (ideally, for example) , 150 rpm) is considered to be obtained.

Therefore, the inventor of the present invention has proposed that the radially inner end portion of one bucket (the bucket that precedes in the rotational direction of the water turbine) and the other of the two buckets disposed adjacent to each other in the circumferential direction of the rotating shaft 21. A flowing water return portion is provided extending between the bucket (the radially outer end of the bucket which is backward with respect to the bucket preceding in the direction of rotation of the water wheel).

FIG. 8A is a front view showing a linear hydroelectric power generation device 500 according to another modified example of the present invention from the direction corresponding to the cross section BB of FIG. 8B is a cross-sectional view taken along the line CC in FIG. 8A.

As shown in FIG. 8A and the like, in the linear hydroelectric power generation device 500 according to the present embodiment, the water wheel 80 is a long-wing water wheel having a plurality of long blades, like the water wheel 20. The water wheel 80, as shown in FIG. 8A etc., includes a plurality of buckets 83 spaced in the circumferential direction of the rotary shaft 21 between two axially spaced support plates 28. , And a flush water return unit 87 disposed between the buckets 83. Further, in the present embodiment, the power transmission device 40 is a chain type power transmission device. Specifically, the power transmission device 40 includes an input gear 811 fixed to the rotation shaft 21 of the water wheel 80, an output gear 822 fixed to the input rotation shaft of the generator 30, and the input gear 811 and the output gear 822. It has a gear chain 833 bridged between them.

Further, as shown in FIG. 8B, in the present embodiment, the water wheel 80 has eight long wings.

In the water wheel 20 and the like of FIG. 3A, the long wing is composed of a bucket 23 and a bucket auxiliary plate 27. On the other hand, in the present embodiment, as shown in FIG. 8B, the long wing is composed of a flat bucket 83.

In the present embodiment, as shown in FIG. 8A, the bucket 83 has a bucket width W83 extending in the axial direction, like the bucket 23. As shown in FIG. 8A, the widthwise side ends of the buckets 83 are each fixed to the support plate 28 by a method such as welding as with the buckets 23. Thus, in the present embodiment, the bucket 83, like the bucket 23, closes the axial direction between the two support plates 28.

Furthermore, in the present embodiment, the bucket 83 has a predetermined water turbine radial direction length L83, as shown in FIG. 8B. In the present embodiment, the radially inner end 83 a of the bucket 83 is disposed at a position close to the rotation shaft 21. In particular, in the present embodiment, of the radially inner end portion 83 a of the bucket 83, the portion closest to the rotating shaft 21 is taken as the radially inner end 83 e 1 of the bucket 83. Further, in the present embodiment, the radially outer end 83 b of the bucket 83 is disposed at the radially outer position of the water wheel 80. In particular, in the present embodiment, the radially outer portion (tip) of the water turbine 80 among the radially outer end portions 83 b of the bucket 83 is used as the radially outer end 83 e 2 of the bucket 83.

As shown in FIG. 8B, the bucket 83 forms an annular gap (in-vehicle hollow portion) S between itself and the rotation shaft 21 in the axial direction. The radially inner end 83 e 1 of the bucket 83 forms a gap A 83 between the radially inner ends 83 e 1 of the buckets 83 adjacent to each other in the circumferential direction. The clearance A83 corresponds to the opening A27 of the water wheel 20.

On the other hand, in the present embodiment, the water wheel 80 has the flowing water return portion 87 between the two buckets 83 arranged adjacent to each other. In the present embodiment, as shown in FIG. 8A, the flowing water rebounding portion 87 has, similarly to the bucket 83, a flowing water rebounding portion width W87 extending in the axial direction. Similar to the bucket 83, the widthwise side ends of the flowing water return portion 87 are fixed to the support plate 28 by a method such as welding. Thus, in the present embodiment, the flowing water return portion 87, together with the bucket 83, closes the axial direction of the two support plates 28.

Further, in the present embodiment, as shown in FIG. 8B, the flowing water return portion 87 includes the radially inner end 83a of one bucket 83 and the other bucket 83 of the two buckets 83 arranged adjacent to each other. It extends between the radially outer end 83b. In the present embodiment, a portion close to the radially inner end 83a of one bucket 83 is the radially inner end 87a of the flowing water return portion 87, and a portion close to the radially outer end 83b of the other bucket 83 is the flowing water The radially outer end 87 b of the rebound portion 87.

In the present embodiment, as described above, the radially inner end 87 a of the flowing water return portion 87 extends toward the radially inner end 83 a of the one bucket 83, and the radial direction of the flowing water return portion 87. The outer end 87 b extends toward the radially outer end 83 b of the other bucket 83. Thereby, the flush water rebounding portion 87 can close at least a part of the gap A 83 corresponding to the flush water rebounding portion 87 in the axial direction view shown in FIG. 8B. In other words, in the axial direction view shown in FIG. 8B, the flowing water return portion 87 can partially close the in-vehicle hollow portion S with respect to the outside world. Thus, the water in the water flow passage 10 can be prevented from entering the in-vehicle cavity S from the radially outer side of the rotary shaft 21 in the axial direction view shown in FIG. 8B.

According to the present invention, the flowing water rebounding portion 87 can connect the radially inner end 87 a of the flowing water rebounding portion 87 to the radially inner end 83 a of the one bucket 83. Further, the flowing water rebounding portion 87 can connect the radially outer end portion 87 b of the flowing water rebound portion 87 to the radially outer end portion 83 b of the other bucket 83. In the present embodiment, the flowing water return portion 87 is connected to the radially inner end 83a of one bucket 83 and the radially outer end 83b of the other bucket 83, as viewed in the axial direction shown in FIG. 8B. A gap A83 corresponding to the flowing water return portion 87, which is formed between two buckets arranged adjacent to each other in the circumferential direction of the rotary shaft 21, is closed. Thus, the water in the water flow passage 10 can be prevented from entering the in-vehicle cavity S from the radially outer side of the rotation shaft 21 in the axial direction view shown in FIG. 8B.

Further, the widthwise side ends of the flowing water return portion 87 are respectively connected to the support plate 28 in the same manner as the bucket 83. Thus, the flowing water return portion 87 can completely close the plurality of gaps A 83 arranged in the circumferential direction, as viewed in the axial direction shown in FIG. 8B. In other words, the flush water return portion 87 can make the entire in-vehicle cavity S into a closed space closed in the circumferential direction. This makes it possible to almost completely prevent the water in the water flow passage 10 from entering the in-vehicle cavity S.

In the present embodiment, the power transmission device 40 is a chain type power transmission device. Specifically, the power transmission device 40 includes an input gear 811 fixed to the rotation shaft 21 of the water wheel 80, an output gear 822 fixed to the input rotation shaft of the generator 30, and the input gear 811 and the output gear 822. It has a gear chain 833 bridged between them.

Next, operation of the water wheel 80 will be described with reference to FIG. 8B and the like. In FIG. 8B, the left side of the drawing is the upstream side of the flow passage 10, and the right side of the drawing is the downstream side of the flow passage 10.

In FIG. 8B, in the water wheel 80, the bucket 83 at position A receives water from the upstream. At this time, the water power received by the pressure receiving surface 84 of the bucket 83 at the position A rotates the water wheel 80 counterclockwise with respect to the drawing. On the other hand, a part of the water received by the bucket 83 at the position A is guided along the pressure receiving surface 84 of the bucket 83 toward the in-vehicle cavity S.

However, in the present embodiment, the water guided toward the in-vehicle cavity S by the bucket 83 at the position A is blocked by the flowing water return portion 87 between the location A and the position H. I will not enter S. The position between the bucket 83 at the position A and the bucket 83 at the position B located downstream of the bucket 83 is below the water surface F. However, the water between the bucket 83 at position A and the bucket 83 at position B may enter the in-vehicle cavity S by being blocked by the flowing water return portion 87 between the position A and the position B. Absent.

The same applies to the bucket 83 at the position B, and also when the bucket 83 is at the position C, between the position B and the position C, the flowing water return portion 87 prevents the water from entering the in-vehicle cavity S while Allow water to drain downstream. In addition, between the position C and the position D, the flowing water return portion 87 discharges the water to the downstream side while preventing the water from entering the in-vehicle cavity S. In particular, the water collected between the position C and the position D and collected between the bucket 83 and the flowing water return portion 87 is discharged radially outward by the rotation of the water wheel 80 (so-called centrifugal force).

Furthermore, even when the water wheel 80 rotates and the bucket 83 advances to the positions D, E, F, H, the remaining water does not enter the in-vehicle cavity S by the flowing water return portion 87, and the water wheel 80 Water is discharged radially outward by the rotation of.

The linear hydroelectric power generation apparatus 500 which concerns on this embodiment has the following effects by using the water turbine 80 which provided the running water return part 87. FIG.

(1) A large power can be obtained by securing a large flow force (water velocity V, water amount of the flow passage 10) of the flow passage 10.
(2) The rotational resistance that may be generated when the unnecessary water flow force from the bucket 83 enters the in-vehicle cavity S is suppressed, and the reduction of the rotational speed of the water wheel 80 can be suppressed. For this reason, according to the present embodiment, it is possible to obtain larger power.
(3) The resistance of the water expelled from the bucket 83 is suppressed. For this reason, according to the present embodiment, it is possible to obtain larger power.
(4) The rotational speed and rotational torque of the water wheel 80 can be increased by the reaction force obtained by the flowing water return portion 87 repelling the water power entering the water wheel 80. For this reason, according to the present embodiment, it is possible to obtain larger power.
(5) The water wheel 80 can be hollowed while preventing the inflow of water flow force into the water wheel 80. For this reason, according to this embodiment, weight reduction of the water wheel 80 can be achieved.
(6) The strength of the bucket 83 (long wing) can be improved. That is, the flowing water return portion 87 functions as a reinforcing material of the bucket 83. For this reason, according to the present embodiment, the strength of the bucket 83 and hence the strength of the water wheel 80 can be improved. In other words, according to the present embodiment, the durability of the linear hydroelectric power generation device can be improved.

According to the linear hydroelectric power generation device 500 according to the present embodiment, the water wheel 80 provided with the flowing water return portion 87 between the two buckets 83 arranged adjacent to each other in the circumferential direction of the rotating shaft 21 is used. It is possible to obtain a power generation device excellent in power generation efficiency comparable to that of the Pelton turbine. Therefore, according to the linear hydroelectric power generation apparatus 500 which concerns on this embodiment, large electric power can be efficiently obtained also in the canal with a small height difference, etc., without utilizing big head, such as a dam.

In particular, in the present embodiment, the flowing water return portion 87 is connected to the radially inner end 83 a of one bucket 83 and the radially outer end 83 b of the other bucket 83. In this case, the strength of the bucket 83 can be further improved. In particular, in the present embodiment, the flowing water return portion 87 is connected to the radially inner end 83 a of one bucket 83 and the radially outer end 83 b of the other bucket 83. In this case, in any of the radially inner end 83 a and the radially outer end 83 b of the bucket 83, deformation that may occur due to the water force is suppressed.

Further, in the present embodiment, the radially inner end portions 83a of the buckets 83 are curved surfaces that are convex radially inward toward the rotation shaft 21 in the axial direction as shown in FIG. 8B. In the present embodiment, the radially inner end portion 83 a of the bucket 83 is configured to have a curvature radius R 87 as viewed in the axial direction. In this case, by smoothly connecting the radially inner end 83 a of the bucket 83 and the radially inner end 87 a of the flowing water return portion 87, water can be more smoothly discharged. In addition, in this embodiment, the bucket 83 and the running water return part 87 are separately comprised, for example, are connected using means, such as welding. However, according to the present invention, the bucket 83 and the flush water return portion 87 can be, for example, an integrally formed product formed by performing a pressing process or the like on a single plate material.

In addition, if FIG. 8A is referred to, in this embodiment, the specification of the water flow path 10 is as follows. The water depth D10 is 500 mm. The water immersion depth D80 of the water wheel 80 is 250 mm. Further, the present embodiment is suitable for use in a water flow channel having a water velocity V of 2 m / s to less than 5 m / s.

Further, in the present embodiment, the specifications of the water wheel 80 are as follows. The water wheel 80 has eight long wings. The long wing is a flat bucket 83. The diameter R80 of the water wheel 80 is 1000 mm. The water wheel width W80 is 1000 mm. The bucket width W83 is preferably 1 inch (about 303 mm) or more. Further, referring to FIG. 8B, the water turbine radial direction length L83 of the bucket 83 is 250 mm. Still referring to FIG. 8B, the length L 87 of the flowing water return portion 87 is 350 mm in the axial direction. The radius of curvature R87 of the radially inner end portion 83a of the bucket 83 is the radius of curvature as viewed in the axial direction, and the radius can be set as appropriate. In the present embodiment, an angle α between the bucket 83 and the flowing water return portion 87 is 75 degrees.

Referring to FIG. 8A, in the present embodiment, the specifications of the power transmission device 40 are as follows. The gear number G1 of the input gear 811 is 65 pitches. The gear number G2 of the output gear 822 is 13 pitches. That is, in the present embodiment, the gear ratio between the input gear 811 and the output gear 822 is 5: 1. In this embodiment, by using the flow channel 10 of the above-mentioned standard according to these conditions, it is possible to secure the rated rotational speed of the generator = 200 to 300 rpm as the rotational speed of the generator 30. Further, according to the present embodiment, the rotational torque of the water wheel 80 shown in FIG. 8A can be 550 × 9.8 Nm (550 kgf).

FIG. 9A is a modified example of the linear hydroelectric power generation device according to FIGS. 8A and 8B, and is a cross-sectional view showing the modified example in a cross section corresponding to the CC cross section of FIG. 8A.

In the present embodiment, the specifications of the water flow passage 10 and the water wheel 80 are the same as those of the linear hydroelectric power generation apparatus shown in FIGS. 8A and 8B.

In the present embodiment, the specifications of the power transmission device 40 are as follows. In the present embodiment, the diameter of the input gear 811 is reduced in the power transmission device 40 of FIG. 8A. In the present embodiment, the gear number G1 of the input gear 811 is 39 pitches, and the gear number G2 of the output gear 822 is 13 pitches. That is, in the present embodiment, the gear ratio between the input gear 811 and the output gear 822 is 3: 1. In this embodiment, 150 rpm or more can be ensured as rotation speed of the generator 30 by using according to these conditions under the flowing water channel 10 of the specification mentioned above. Moreover, according to this embodiment, the rotational torque of the water wheel 80 of the water wheel 80 shown in FIG. 9A can be 450 × 9.8 Nm (450 kgf).

Further, according to the linear hydroelectric power generation device according to the present invention, it is preferable to change the number of long blades of the water wheel 80 according to the water velocity V of the water flow passage 10. As a specific example, it is preferable to decrease the number of long blades of the water wheel 80 as the water velocity V increases.

9B is another modification of the linear hydroelectric power generation apparatus according to FIG. 8A, and is a cross-sectional view showing the modification in a cross section corresponding to a cross section taken along a line CC in FIG. 8A.

In the present embodiment, the standard of the water flow passage 10 is basically the same as that of the linear hydroelectric power generator of FIG. 8A etc., but in the present embodiment, the water velocity V is for use in the water flow passage of 5 m / s or more. It is suitable.

Further, in the present embodiment, the specifications of the water wheel 80 are as follows. The water wheel 80 has six long wings. The long blade is composed of a flat plate bucket 83 as in the linear hydroelectric power generation apparatus of FIG. 8A and the like. The diameter R80 of the water wheel 80, the water wheel width W80, and the bucket width W83 are the same as those of the linear hydroelectric power generation device of FIG. 8A and the like. The hydraulic turbine radial direction length L83 of the bucket 83 is 250 mm. The length L 87 of the flowing water return portion 87 is 430 mm in the axial direction. The radius of curvature R87 of the radially inner end portion 83a of the bucket 83 is the radius of curvature as viewed in the axial direction, and the radius can be set as appropriate.

Further, in the present embodiment, the standard of the power transmission device 40 is the same as that of the power transmission device 40 of FIG. 9A. The gear number G1 of the input gear 811 is 39 pitches. The gear number G2 of the output gear 822 is 13 pitches. That is, in the present embodiment, the gear ratio between the input gear 811 and the output gear 822 is 3: 1. In the present embodiment, by using the flow channel 10 of the above-described standard according to these conditions, it is possible to ensure the rated rotational speed of the generator = 250 rpm or more as the rotational speed of the generator 30. Further, according to the present embodiment, the rotational torque of the water wheel 80 shown in FIG. 9B can be 250 × 9.8 Nm (250 kgf).

FIG. 10 is a further modified example of the linear hydroelectric power generation apparatus according to FIG. 8A, and is a cross-sectional view showing the modified example in a cross section corresponding to a cross section taken along line CC of FIG. 8A.

According to the present invention, the flowing water rebounding portion 87 can be applied to the water wheel 20 of FIG. 3A or the like. In the embodiment of FIG. 10, the radially inner end 87a of the flowing water return portion 87 is a connection portion between the bucket 23 and the bucket auxiliary plate 27 along the radial direction of the rotary shaft 21 in the axial direction view shown in FIG. And the radially inner end 27a of the bucket auxiliary plate 27 can be disposed at any position. In the present embodiment, the radially inner end 87 a of the flowing water return portion 87 is connected to the radially inner end 27 a of the bucket auxiliary plate 27. In particular, in the present embodiment, the radially inner end 87 e 1 of the flowing water return portion 87 coincides with the radially inner end of the bucket auxiliary plate 27. The “connection portion between the bucket 23 and the bucket auxiliary plate 27” corresponds to the radially inner end 23 a of the bucket 23 when the water wheel 20 is viewed as the bucket 23 alone. Moreover, the said connection part is corresponded to the radial direction outer side edge part 27b of the said bucket auxiliary plate 27, when the water turbine 20 is seen by the bucket auxiliary plate 27 single-piece | unit.

On the other hand, the “radially outer end portion of the other bucket” to which the other one of the flowing water return parts 87 is connected can be a portion of the bucket 23 having the linear pressure receiving surface 25. In the present embodiment, the radially outer end portion 87 b of the flowing water return portion 87 is connected to the radially outer end portion (tip portion) 23 b of the bucket 23. In this case, it is preferable that the flowing water return portion 87 be extended so as to coincide with a straight line that forms the pressure receiving surface 25 in an axial view as shown in FIG. Further, in the present embodiment, the radially outer end 87 e 2 of the flowing water return portion 87 coincides with the radially outer end (tip) of the bucket 23.

In the present embodiment, the bucket 23 and the flowing water return portion 87 are formed by, for example, pressing a single plate material. That is, in the present embodiment, the bucket 23 and the flush water return part 87 are an integrally molded product.

The foregoing merely discloses several embodiments of the present invention, and various modifications may be made in accordance with the appended claims. For example, in each of the embodiments described above, each water flow passage is preferably linear as shown in a plan view of FIG. 1 and the like, but according to the present invention, each water flow passage is curved. You can also. Further, in each of the embodiments described above, the long wing of the water wheel can be configured of only a bucket, or either of a bucket and a bucket auxiliary plate. Each configuration of the linear hydroelectric power generation device according to each embodiment described above, for example, each configuration of the long blade and bucket of the water turbine, and each configuration of the linear hydroelectric power generation device according to the modification described above, for example, the long blade of the water turbine The respective configurations of the buckets can be used by appropriately replacing each other or in combination. Furthermore, in the present invention, as described above, the diameter of the water wheel can be changed as appropriate. In particular, if the diameter of the water wheel is reduced, the rotational speed of the water wheel can be increased.

10: water flow path, 11: bottom wall, 12: side wall, 15: water gate, 16: obstacle elimination equipment, 17: reinforcement post, 20: water wheel, 20A to 20E: water wheel, 70: water wheel, 80: water wheel, 21: Rotating shaft, 22: Bearing, 23: Bucket, 23a: Radial inner end of bucket, 23b: Radial outer end of bucket, 24: Pressure receiving surface, 24 ': Pressure receiving surface, 25: Pressure receiving surface, 25': Pressure receiving surface, 26: Pressure receiving surface, 27: Bucket reinforcing plate, 27a: Radial inner end of bucket reinforcing plate, 27b: Radial outer end of bucket reinforcing plate, 28: Support plate, 29: Bucket reinforcing portion, 30 : Generator, 40: Power transmission, 50: Current collector, 60: Water wheel, 70: Water wheel, 80: Water wheel, 83: Bucket, 83a: Radial inner end of bucket, 83b: Radial outer end of bucket Department, 8 A pressure receiving surface 87 A flowing water return portion 87a A radially inner end of the flowing water return portion 87b A radially outer end of the flowing water return portion 100 A linear hydroelectric power generation apparatus 200 A linear hydroelectric power generation apparatus 300 Linear hydroelectric power generation equipment, 400: Linear hydroelectric power generation equipment, 500: Linear hydroelectric power generation equipment, D10: Water flow channel depth, D20: Water car immersion depth, D80: Water car immersion depth, Df: Remaining depth, L20: L23 pitch length (distance between the mills), L23: Bucket radial length, L83: Bucket radial length, L25: Length of linear pressure receiving surface, L27: Bucket support Radial length of plate, R87: Curvature radius of radial inner end of flowing water return part, L87: Longitudinal diameter of flowing water return part, R24: Curvature radius of bucket, S10: Flow Area, S10-1: Flow area of flooded bed, S10-2: Flow area of pressurized water bed, S20: Pressure receiving area of water wheel, S23: Pressure receiving area of bucket, S27: Pressure receiving area of bucket reinforcement plate, S70 : Water receiving pressure area, VL: Water flow volume around water wheel, VW: Water flooding volume, W10: Water flow width, W10A: Water flow width of first water flow, W10B: Water flow width of second water flow, W20: Water water Width, W23: Bucket width, WF: Water surface width

Claims

A flowing channel with a gradient and flowing water;
A plurality of water wheels disposed in the water flow passage at intervals in the extension direction of the water flow passage;
And a generator driven by the water wheel,
The water wheel is
An axis of rotation extending in the width direction of the water flow path;
A plurality of buckets spaced circumferentially about the axis of rotation;
Have
The water depth of the water flow passage is twice or more the depth at which the bucket is submerged in the water flow,
Or
In the linear hydroelectric power generation system, the amount of water passing through the water flow passage is at least twice the amount of water of the water flow blocking resistance of the bucket,
The water wheel further includes support plates on both sides in the width direction of the bucket,
The support plates are respectively fixed on both sides in the width direction of the bucket,
Furthermore, the water wheel is a bucket extending from a radially inner end of one of the buckets or from the bucket toward the rotation shaft between two buckets disposed circumferentially adjacent to the rotation shaft. A linear hydroelectric power generation apparatus, comprising: a flowing water return portion extending between a radially inner end of the auxiliary plate and a radially outer end of the other bucket.
The linear hydraulic power generator according to claim 1, wherein the pressure receiving surface of the bucket is a pressure receiving surface curved in a semi-cylindrical shape in a fluid flow direction as viewed in the axial direction of the rotation shaft.
The linear hydroelectric power generation device according to claim 1, wherein the bucket has a linear pressure receiving surface at a tip end portion of the bucket in an axial direction of the rotation shaft.
The flowing water return portion is connected to the radially inner end of the one bucket and the radially outer end of the other bucket, and is disposed adjacent to the circumferential direction of the rotation shaft The linear hydroelectric power generation device according to any one of claims 1 to 3, wherein a gap corresponding to the flowing water return portion, which is formed between the two buckets being closed, is closed.
The linear hydroelectric power generation device according to any one of claims 1 to 4, wherein the water wheel further includes a bucket reinforcing portion extending in a circumferential direction of the rotation shaft and integrally fixing each of the tips of the buckets. .
The linear hydroelectric power generation device according to any one of claims 1 to 5, wherein the water flow path has a fluid inflow blocking portion that blocks the inflow of fluid.