JP5860094B2 - Hydroelectric generator - Google Patents

Description

  The present invention relates to a hydroelectric generator that generates power in a state moored at a predetermined position on a water surface such as a river.

  One of the renewable energy sources that has been gaining attention in recent years is hydroelectric power generation. Hydroelectric power generation enables stable power generation and keeps power generation costs relatively low compared to solar power generation, which can generate electricity only during the day, and wind power generation, where the amount of power generation tends to vary depending on the weather. There is a merit that can be.

  As this hydroelectric power generation device, for example, as shown in Patent Document 1, there is an embodiment in which a water turbine connected to a generator is provided in running water. Since the rotating shaft of the water turbine is fixed at a predetermined position, when the height of the water surface fluctuates, the inundation depth of the water turbine changes, and the power generation amount tends to vary.

  Therefore, for example, in the configuration shown in Patent Document 2, the floating plate that rotatably fixes the water wheel is in a state of floating on the water surface, and the water wheel is always kept in a state where it is immersed in the same depth (FIG. 1 of this document). b)). In this water wheel, blades are formed around the shaft. If foreign matter such as driftwood flowing along with the water flow comes into contact with the blades and is damaged, power generation efficiency may be reduced. For this reason, a dust removing screen is provided on the upstream side of the water wheel, foreign matter is removed by the dust removing screen, and only water is fed into the water wheel.

JP 9-41350 A JP2013-245618A

  In the configuration according to Patent Document 2, foreign matter such as driftwood flowing along with running water is removed by a dust removing screen. However, when the dust removing screen is clogged by the foreign matter, the water flow is hindered and power generation efficiency is increased. There is a problem that decreases. Even in a situation where clogging is not occurring, the water flow is somewhat hindered by the dust removing screen itself, so that a slight decrease in power generation efficiency is inevitable.

  Accordingly, an object of the present invention is to ensure stable and high power generation efficiency in a hydroelectric power generation apparatus.

In order to solve the above-described problems, the present invention has a hollow cylindrical shape, and a cylindrical portion is provided with a bent portion that is bilaterally symmetric with respect to the center line in the left-right direction and whose central portion faces the rear side in the rotational direction. a recessed groove in plan view dogleg is formed, a rotating body which rotates around an axis by receiving a water flow, the direction on the upstream side of the water flow, tip width is decreased perpendicular to the more upstream side water flow And a storage recess formed on the lower surface side that rotatably stores the rotating body, and a discharge hole that is formed on the downstream side of the storage recess and discharges the water flowing in the vicinity of the storage recess to the downstream side. And a main body unit moored at a predetermined location in the water flow while maintaining a state of floating on the water surface.

  In this way, the rotating body is formed into a hollow cylindrical shape, and a water flow is received in the concave groove formed on the cylindrical surface so that the rotating body rotates around the axis, so that a foreign object comes into contact with the cylindrical surface. However, since there are no blades protruding from the cylindrical surface, breakage is unlikely to occur. For this reason, it is not necessary to provide the member for removing this foreign material in the upstream of a rotary body, and the water flow which reaches this rotary body is not prevented. In addition, by forming the concave groove in the shape of a dogleg, water can be separated and flow smoothly on both sides in the axial direction of the rotating body, and the water flow for rotating the rotating body can be sent downstream without meandering. . Furthermore, the water sent to the downstream side is discharged as it is from the discharge hole and does not lose its place on the way. For this reason, it is possible to prevent the water flow from being disturbed in the vicinity of the rotating body and the main body, and the main body from inadvertently swinging left and right. For this reason, stable power generation efficiency can be ensured.

  In the said structure, it is preferable to set it as the structure which provided the guard member which protects this rotary body from a foreign material under the said rotary body.

  As described above, the cylindrical rotating body is basically excellent in breakage resistance against the collision of a foreign object, but the durability is further improved by providing a guard member to protect the rotating body. be able to.

  In the configuration according to the present invention, the rotating body that rotates by receiving a water flow has a hollow cylindrical shape, and the rotating body is stored in a storage recess formed on the lower surface side of the main body, and the water flowing in the vicinity of the storage recess is allowed to flow. The structure which discharges from the discharge hole formed in the main body is adopted. By configuring the hydroelectric generator in this way, even if foreign matter flows along with running water, the rotating body can be maintained in a rotating state without being damaged. For this reason, the stable high electric power generation state is securable. Moreover, since it can be installed in a short time and can be easily moved to a required place, it is very convenient. In addition, since the rotating body has a cylindrical shape, foreign substances are not easily entangled with the rotating body, so that maintenance such as cleaning can be performed very simply.

Partial longitudinal sectional view of the hydroelectric generator according to the present invention The bottom view which notched some hydroelectric generators shown in FIG. 1 is a longitudinal sectional view of the main part of FIG. Sectional drawing which follows the IV-IV line in FIG. Sectional drawing which follows the VV line in FIG.

  Embodiments of the hydroelectric generator according to the present invention are shown in FIGS. This hydroelectric power generation apparatus includes a hollow cylindrical rotating body 1 that rotates around a rotation axis in response to a water flow f, and a main body 2 formed in a ship shape as main components. Since the rotator 1 is hollow, the rotator 1 alone is substantially floated on the water surface and cannot receive the water flow f effectively. However, by attaching the rotator 1 to the main body 2, the main body 2 With this weight, the rotary body 1 can be submerged in water to a predetermined depth. Thus, by sinking the rotating body 1 to a predetermined depth, the rotating body 1 can effectively receive the water flow f, and high power generation efficiency can be obtained.

  On the cylindrical surface of the rotator 1, a dog-shaped concave groove 3 having a bent portion facing in the rotation direction is formed. As shown in FIG. 3 and the like, the cross section of the concave groove 3 has a larger inclination angle with respect to the cylindrical surface on the downstream side 3b than on the upstream side 3a of the water flow f. By making the cross-sectional shape in this way, the water flow f can be smoothly guided into the concave groove 3, and the rotary body 1 can be rotated by efficiently receiving the water flow f at the concave groove 3 (downstream side 3b). it can.

  The main body portion 2 is formed with a tip portion 4 that faces the upstream side of the water flow f and decreases in width in the direction orthogonal to the water flow toward the upstream side. The tip portion 4 corresponds to the bow of a ship. By forming the tip portion 4 in this manner, the state in which the main body portion 2 faces the upstream side can be stably maintained. On the lower surface side of the main body 2, a housing recess 5 for housing the rotating body 1 is formed. The bearing 7 that holds the rotating shaft 6 of the rotating body 1 is formed in a cross shape, and the rotating shaft 6 can be held at any position of the cross shape. By changing the holding position of the rotating shaft 6 in the bearing 7, the downward protrusion amount of the rotating body 1 from the lower surface of the main body 2 and the position in the front-rear direction can be adjusted. For example, as shown in FIG. 3, by providing the rotary shaft 6 with a moving mechanism 8 that moves the rotary shaft 6 in the front-rear direction and the vertical direction, the holding position of the rotary shaft 6 in the bearing 7 can be stabilized. it can.

  A discharge hole 9 is formed on the downstream side of the storage recess 5 to discharge the water flowing in the vicinity of the storage recess 5 to the downstream side. By forming the discharge hole 9, it is possible to prevent the water flowing in the vicinity of the storage recess 5 from losing its place and causing the water flow f to be disturbed, and the main body 2 to be swung from side to side inadvertently. For this reason, stable power generation efficiency is ensured. The storage recess 5 has a shape that approaches the cylindrical surface of the rotator 1 on the upstream side, and continuously reaches the discharge hole 9 away from the cylindrical surface on the downstream side. By forming the storage recess 5 in this way, the water used for the rotation of the rotating body 1 can be smoothly guided to the discharge hole 9.

  A plurality of guard members 10 are provided in the lower part of the storage recess 5 from the front to the rear so as to straddle the rotating body 1. The guard member 10 is a rod-shaped member made of a material having a predetermined strength such as steel or reinforced resin. By providing the guard member 10, foreign matter such as driftwood flowing along with running water can be prevented from coming into direct contact with the rotating body 1, and the durability of the rotating body 1 can be improved.

  As the material of the main body 2, for example, fiber reinforced plastic (FRP) or polyphenylene sulfide (PPS) having a hollow structure is used. With this hollow structure, electrical equipment (not shown) such as a generator and a control device can be stored in the main body 2 so as not to get wet. Further, by providing a protective member 11 made of a material such as rubber around the main body 2, it is possible to prevent the main body 2 from being damaged when a foreign object contacts the main body 2. .

  Furthermore, a heating member (not shown) such as a heating wire for melting the snow is provided on the surface of the main body 2, or a smooth surface treatment is performed for sliding the accumulated snow down by vibration of the water flow f. It is preferable to do this. If it does in this way, when this hydroelectric power generation device is used in a snowy area, it can prevent that the whole hydroelectric power generation device is submerged or inclined by snow accumulation, and power generation efficiency falls. As shown in FIG. 1, the effect of falling snow can be further enhanced by configuring the upper surface of the main body portion 2 to bulge upward.

  The main body 2 can be provided with a weight 12 in a detachable manner. By appropriately changing the weight and attachment position of the weight 12, the posture of the main body 2 can be maintained in an optimum state corresponding to the amount of water and the flow velocity at the place where the hydroelectric generator is installed.

  In addition, mooring jigs 14 are provided at the corners of the main body 2 (for example, front and rear left and right sides) so that the mooring ropes 13 can be attached. By connecting one end of the mooring rope 13 to the mooring jig 14 and tying the other end of the mooring rope 13 to the surrounding ground or trees where the hydroelectric power generation device is installed, the hydroelectric power generation device is caused to flow into the water flow f. Without being anchored at a predetermined position. Further, a through hole 15 extending from the upper surface side to the lower surface side of the main body portion 2 is formed in the distal end portion 4 of the main body portion 2, and a mooring rod 16 erected and fixed to the bottom of a river or the like is inserted into the through hole 15. It can also be set as a structure. The length of the mooring bar 16 is slightly longer than the assumed maximum water level of a river or the like. If it does in this way, the main-body part 2 will move up and down freely with the water level fluctuation | variation of a river etc., and the rotary body 1 can be rotated stably irrespective of this water level.

  As shown in FIG. 4, the rotating shaft 6 of the rotating body 1 includes a speed increasing device 17 and a generator 18 for increasing the rotation speed of the rotating shaft 6, and a control device 19 for performing power conversion and device control. Is provided. By these, hydroelectric power generation can be performed efficiently. In addition, arrangement | positioning of the speed increasing apparatus 17 grade | etc., Shown in this figure can also be changed suitably.

  The size of the hydroelectric generator can be changed as appropriate according to the size of the river or the like. For example, when installing in an irrigation channel with a roadside width of about 1 to 2 m, the total width of the hydroelectric generator is about several tens of centimeters, and when installing in a river with a river width of several tens of meters, the total width is about several meters. Is efficient and preferred.

  The above embodiment is merely an example, and as long as the problem of the present invention of ensuring stable high power generation efficiency in the hydroelectric power generation apparatus can be solved, the shape, arrangement, and the like of the rotating body 1 and the main body 2 are appropriately set. Can be changed.

DESCRIPTION OF SYMBOLS 1 Rotating body 2 Main-body part 3 Groove | groove 4 Tip part 5 Storage recessed part 6 Rotating shaft 7 Bearing 8 Moving mechanism 9 Discharge hole 10 Guard member 11 Protection member 12 Weight 13 Mooring rope 14 Mooring jig 15 Through hole 16 Mooring rod 17 Acceleration Device 18 Generator 19 Controller f Water flow

Claims (2)

A hollow-cylindrical shape having a fold-shaped groove (3 in plan view ) having a bent portion whose left and right sides are symmetrical with respect to the center line in the left-right direction and whose central portion faces the rear side in the rotation direction. ), And a rotating body (1) that rotates around an axis in response to the water flow (f),
It is formed on the upstream side of the water flow (f), the tip (4) whose width in the direction perpendicular to the water flow (f) decreases toward the upstream side, and the lower surface side that rotatably stores the rotating body (1). A storage recess (5) and a discharge hole (9) formed on the downstream side of the storage recess (5) for discharging the water flowing in the vicinity of the storage recess (5) to the downstream side. A main body (2) moored at a predetermined location in the water flow (f) while maintaining a floating state in the water flow,
A hydraulic power unit that attaches the rotating body (1) to the main body portion (2) so that the weight of the main body portion (2) causes the rotating body (1) to sink into water to a predetermined depth. Power generation device.   The hydroelectric generator according to claim 1, wherein a guard member (10) for protecting the rotating body (1) from foreign substances is provided below the rotating body (1).

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