JP2017509828A - Turbine for tidal hydropower - Google Patents

Abstract

The present invention is an improved tidal water that enables continuous power generation by rotating only in one direction even if the direction of water flow changes, and enabling continuous power generation even if the level of flowing water changes. A turbine for power generation and a tidal hydroelectric generator using the turbine are provided so that power generation is possible without changing the natural ecosystem.

Description

  The present invention relates to a tidal hydroelectric power generation turbine. More specifically, the present invention is capable of continuous power generation by rotating regardless of the direction in which water flows, and is capable of generating power in a floating state on water. In particular, the present invention relates to a tidal hydraulic power generation turbine that has been improved so as to be able to generate power continuously regardless of the level of sea level and the amount of water in a river, and a tidal hydro power generation apparatus using the turbine.

  In general, systems for tidal and hydroelectric power generation have been disclosed, and such tidal and hydroelectric power generation systems can obtain electric energy using natural energy, so they are highly recommended for the global environment. It is a fact already known that it is a system that has been used.

  Therefore, a large number of tidal and hydroelectric generators and turbines as described in the prior art documents have been disclosed.

  However, the prior art not only has to have a fixed structure or must use a drop water pressure, but it must be able to generate electricity only when there is a tidal channel. is there.

  Therefore, it is necessary to perform hydroelectric power generation using a fixed structure or dam to provide a tidal channel, which not only causes problems that cause changes in the natural ecosystem, but also requires a lot of facility costs. There are problems that must be invested.

  In particular, in the case of tidal power generation in the prior art, tidal hydro power generation can be performed only with water flowing in only one direction, and therefore there is a problem that it cannot be operated when full tide enters.

  The present invention is an improved tidal water that enables continuous power generation by rotating only in one direction even if the direction of water flow changes, and enabling continuous power generation even if the level of flowing water changes. The purpose is to provide a turbine for power generation and a tidal hydroelectric generator using the turbine.

  Another object of the present invention is to make it possible to generate power without changing the natural ecosystem.

  The present invention provides a center member to which a turbine shaft is fixed, a pair of horizontal support members fixed to be opposed to the upper and lower portions of the center member, and a circle around the turbine shaft between the pair of horizontal support members. A plurality of blade support shafts are fixed at equal intervals in the circumferential direction, and one or more blade support shafts are provided at one point, and the blade support shafts are supported by the blade support shafts in the vertical direction. A turbine for tidal hydroelectric power generation comprising a plurality of propulsion blade means which is movable and has an upper blade piece and a lower blade piece which are vertically arranged around an intermediate hinge portion and opened and folded in the vertical direction. Is the feature.

  The middle hinge portion is provided in a large number in the upper and lower blade pieces, and the hinge shaft is inserted into the shaft hole of the hinge piece fitted in a line with each other, or the middle portion of the upper and lower blade pieces is Another feature is that it is composed of any one of hinges and bent spring steel plates having the property of being bent.

  The upper and lower blade pieces where the intermediate hinge portion is located are provided with a plurality of blade spread suppressing pieces that protrude to the outside between the hinge pieces. And

  The upper and lower blade pieces of the propulsion blade means are each provided with a moving member having a shaft hole through which the blade support shaft passes, so that the reciprocating movement in the vertical direction is possible, and when the moving member moves in the vertical direction, The lower blade pieces are connected to each other so as to rotate around the moving member, and the moving member is stopped from being caught by a stopper provided in the middle of the blade support shaft. This is another feature.

  The upper and lower blade pieces centering on the hinge shaft hole at the rear of the moving member inserted into the space portion provided in each of the upper and lower blade pieces and the hinge shaft inserted into the hinge shaft holes of the fixing members on both sides of the space portion. The shaft hole of the moving member has a diameter larger than the diameter of the blade support shaft so that there is a margin between the shaft hole and the blade support shaft, or the upper and lower blade pieces Any of the above can be connected to a ball provided to be rotated by a moving member so that the upper and lower blade pieces can be rotated in the process of moving the moving member in the vertical direction. Another feature is to make it one.

  Another feature is that the moving member can be moved while being pressed in the stopper direction by an elastic member inserted into the blade support shaft.

  According to the present invention, one or more turbines configured as described in the first item are installed in a direction perpendicular to one turbine shaft, and the floating shaft floats on the surface of the water by the buoyancy of the float. Electric energy is produced so that rotational force is transmitted to a generator that penetrates and is fixed to the support member, and the floating member is composed of a seabed fixing means and a wire fixed to the seabed. Another feature of the present invention is a tidal hydroelectric generator using a tidal hydropower turbine that is connected.

  The seabed fixing means includes a bolt rod connected to a wire and having an expanded inclined head, and a plurality of expanded pieces provided between a lower end crack hole for opening outward by the expanded inclined head. A tube body coupled so as to penetrate the bolt rod, a washer member inserted into the bolt rod at the upper portion of the tube body, and a nut member fastened to the bolt rod at the upper portion of the washer member. Features.

  Since the turbine rotates in only one direction even if the direction of water flow changes, the present invention not only has the effect of enabling continuous power generation unless the water flow stops, but also changes the level of the water level. However, it has the effect of enabling sustainable power generation.

  In the present invention, the turbine immersed in water can rotate without using any ball bearing or metal bearing that requires lubricating oil, and a ball bearing or metal bearing that requires lubricating oil is used. Other power generation devices and components can generate electricity while floating on the surface of the water, so it is possible to generate electricity while preventing water from being polluted by oil such as lubricating oil, which will change the natural ecosystem. It will provide the effect of enabling environmentally friendly power generation without it.

1 is an overall perspective view of a tidal hydraulic power generation turbine according to the present invention. It is a plane lineblock diagram of a turbine for tidal hydraulic power generation concerning the present invention. It is the isolation | separation perspective view which showed the propulsion blade means which concerns on this invention. It is the perspective view which showed the combined state of the propulsion blade means which concerns on this invention. (A), (b) is the isolation | separation perspective view and action figure which showed the connection structure of the moving member which moves along the blade | wing support axis | shaft with the upper and lower blade piece of this invention. It is a cross-sectional block diagram of the propulsion blade | wing means shown in the cross-sectional state of the XX 'line | wire of FIG. (A), (b) is a cross-sectional block diagram of the other Example of the intermediate | middle hinge part based on this invention. It is action explanatory drawing of the propulsion blade means shown in the cross-sectional state of the YY 'line | wire of FIG. (A) is the plane cross-section block diagram with which the blade | wing support shaft and moving member of this invention were combined, (b) is the action state explanatory drawing. (A) is the plane cross-section block diagram which showed the state with which the moving member of this invention and the upper and lower blade piece were connected, (b) is the action state explanatory drawing. FIG. 6 is a schematic diagram of still another embodiment of the present invention. 1 is an overall configuration diagram of a tidal hydroelectric generator in a state where a turbine of the present invention is employed. (A) is a cross-sectional block diagram of the seabed fixing means of the tidal hydroelectric generator according to the present invention, and (b) is a perspective view showing the main body of the seabed fixing means.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  1 to 6, a turbine 10 according to the present invention includes a center member 12 to which a turbine shaft 11 is fixed, and a pair of horizontal support members 13 and 13 ′ are respectively provided on the upper and lower portions of the center member 12. Opposed and fixed.

  In FIG. 6, reference numeral 11 a indicates a key that transmits the rotational force of the central member 12 to the turbine shaft 11. Between the pair of horizontal support members 13 and 13 ', a large number of blade support shafts 14 are fixed at equal intervals in the circumferential direction around the turbine shaft 11, and the blade support shafts 14 are at one point. The blade support shaft 14 is fixed between the pair of horizontal support members 13 and 13 'in a state where the propulsion blade means 20 described later is assembled. Is.

  Therefore, it is desirable that a pair of blade support shafts 14 be fixed in the direction of the turbine shaft 11 from the outside of the horizontal support members 13 and 13 ′, as shown in FIGS. . In FIG. 3, reference numeral 14 a indicates a bolt for fixing the blade support shaft 14.

  The present invention includes propulsion blade means 20 supported by the blade support shaft 14 so as to be movable in the vertical direction. As shown in FIGS. 1 and 2, the propulsion blade means 20 is installed so as to be supported by a plurality of blade support shafts 14 installed at equal intervals. A number of propulsion blade means 20 are provided at equal intervals in the circumferential direction.

  3 to 6, the propulsion blade means 20 of the present invention includes an upper blade piece 21 and a lower blade piece 21 ′ arranged in the vertical direction around the intermediate hinge portion 22, and the upper and lower blade pieces. 21 and 21 'can be opened and folded up and down.

  Since the upper and lower blade pieces 21 and 21 'described above are made of a plate material, if a large number of reinforcing projections are formed on the plate by pressing in a strip shape with a press die, for example, a stronger state is obtained. Since the upper and lower blade pieces 21 and 21 'can be configured, and such a reinforcing structure technique is already known, the drawings and description thereof will be omitted.

  Therefore, the intermediate hinge portion 22 that allows the upper and lower blade pieces 21 and 21 'to be opened and folded in the vertical direction is formed as shown in FIGS. It is desirable that the hinge shaft 25 is inserted into the shaft hole 23a of the hinge pieces 23, 23 'that are provided in large numbers on the respective 21' and are fitted in a row.

  However, as shown in FIG. 7A, the upper and lower blade pieces 21, 21 ′ may be the intermediate hinge portion 22 connected by the hinge 26, or as shown in FIG. 7B. It can also be an intermediate hinge part 22 in which the upper and lower blade pieces 21, 21 'are connected by a spring steel plate material 26' having the property of being able to bend.

  Referring to FIG. 3, according to the present invention, the upper and lower blade pieces 21 and 21 ′ where the intermediate hinge portion 22 is provided protrude to the outside at every interval between the hinge pieces 23 and 23 ′. It is desirable to provide a large number of blade spread suppressing pieces 24.

  3 to 5, the upper and lower blade pieces 21 and 21 'of the propulsion blade means 20 of the present invention have one or more moving members 27 each having a shaft hole 28 through which the blade support shaft 14 passes. The upper and lower blade pieces 21 and 21 ′ are connected to each other by the connecting shaft 271.

  Referring to FIGS. 5A and 5B, the pair of fixing members 212 and 212 ′ are fixed so as to face each other on both sides of the space 211 formed in the upper and lower blade pieces 21 and 21 ′, respectively. The moving member 27 is inserted between the pair of fixing members 212 and 212 ′ so that the hinge shaft 213 is connected to the fixing member 212 on one side and the hinge shaft holes 214 and 271 of the moving member 27 and the other fixing member 212 ′. It is made to connect through.

  The blade support shaft 14 passes through the shaft hole 28 of the moving member 27, and the moving member 27 moves in the vertical direction along the blade support shaft 14.

  Therefore, as shown by the solid line in FIG. 5B, when the moving member 27 moves downward along the blade support shaft 14, the moving member 27 moves in the linear direction. The fixing members 212 and 212 ′ are rotated clockwise around the hinge shaft 213, and on the contrary, the moving member 27 is moved upward along the blade support shaft 14 as shown in phantom lines. Then, in the process in which the moving member 27 moves in the linear direction, the fixing members 212 and 212 ′ rotate about the hinge shaft 213 in the counterclockwise direction, so that the moving member 27 supports the blades. While being able to move in the vertical direction along the shaft 14, the upper and lower blade pieces 21, 21 ′ are rotated at a point where the upper and lower blade pieces 21, 21 ′ are connected to the moving member 27. 'Opens It can be folded up.

  The moving member 27 is hooked on a stopper 15 provided in the middle of the blade support shaft 14, so that the movement stops in the middle of the blade support shaft 14.

  Referring to FIG. 8, in the present invention, when hydrodynamic force does not act at all on the upper and lower blade pieces 21, 21 ′ of the propulsion blade means 20, the upper and lower blades are illustrated as shown by the phantom lines in FIG. The pieces 21, 21 'are all in a state of being lowered by their own weight.

  At this time, the moving member 27 of the upper blade piece 21 is caught by the stopper 15 and cannot be lowered further, so that the upper and lower blade pieces 21 and 21 ′ do not overlap completely and are slightly overlapped. It will stay open.

  On the other hand, in order to help the understanding of the present invention, the direction side where the blade spread suppressing piece 24 is located around the hinge shaft 25 is abbreviated as the rear surface portion of the propulsion blade means 20, or the rear surface portions of the upper and lower blade pieces 21, 21 ′. The direction opposite to the blade spreading suppression piece 24 around the hinge shaft 25 is abbreviated as the front portion of the propulsion blade means 20, or the front portion of the upper and lower blade pieces 21, 21 '. I will do it.

  Therefore, when water flows in the direction of the arrow indicated by “A” shown in FIG. 8, the force of the water flowing acts on the front surfaces of the upper and lower blade pieces 21, 21 ′. The lower blade pieces 21 and 21 'are in a state of trying to rotate in the vertical direction about the hinge shaft 25. However, since the moving member 27 of the lower blade piece 21' is caught by the horizontal support member 13 ', The upper blade piece 21 rotates upward and opens as shown by the solid line in FIG.

  At this time, the blade spread suppressing piece 24 in the upper blade piece 21 comes into contact with the lower blade piece 21 ′ and is caught, and the blade spread suppressing piece 24 in the lower blade piece 21 ′ is in the upper blade piece 21. The upper and lower blade pieces 21, 21 ′ are not restrained from being opened any more by being brought into contact with and caught on the upper and lower blade pieces 21, 21, Even if a strong hydrodynamic force acts on 21 ′, the upper and lower blade pieces 21 and 21 ′ have a supporting force that supports them so that they do not break.

  Therefore, when the upper and lower blade pieces 21 and 21 ′ are opened as shown by the solid line in FIG. 8 due to the hydrodynamic force, the hydrodynamic force (tidal hydropower) is supplied to the horizontal support members 13 and 13 via the blade support shaft 14. It is transmitted to 'and the turbine 10 starts rotating.

  Then, the upper and lower blade pieces 21 and 21 in the direction indicated by the arrow “B” in FIG. 8 are opened in a state where the upper and lower blade pieces 21 and 21 ′ are opened as shown by the solid line in FIG. 'When the water flows toward the rear surface portion, the upper blade piece 21 moves so as to move downward as the hydrodynamic force acts on the rear surface portion of the upper and lower blade pieces 21, 21'. Therefore, a relatively very weak hydrodynamic force is applied, compared to when the upper and lower blade pieces 21 and 21 'are open.

  On the other hand, in order to help the understanding of the present invention, as shown by the solid line in FIG. 8, the upper and lower blade pieces 21 and 21 'are operated so as to open, or the propulsion blade means 20 is expanded or the upper and lower blades are operated. When the propulsion blade means 20 is folded, it is named as an unfolding operation of the pieces 21 and 21 ', and conversely, as shown in phantom lines in FIG. It will be described by abbreviated as a tatami mat operation or a fold operation of the upper and lower blade pieces 21, 21 '.

  Accordingly, the flow of water from the right side of the turbine 10 to the left side as indicated by the arrow Hw in FIG. 2 is referred to as a full tide state Hw, and conversely the turbine as indicated by the arrow Lw. The operation of the turbine 10 according to the present invention at the time of high tide and low tide is described as follows, assuming that the water flows from the left side to the right side of 10 as the low tide state Lw.

  That is, in the full tide state Hw in FIG. 2, among the numerous propulsion blade means 20, the individual propulsion blade means 20 and the like positioned below the horizontal center line S indicated by reference numerals 20 a to 20 d are displayed. When the hydrodynamic force acts on the front surface, the upper and lower blade pieces 21 and 21 'are deployed, and are located above the horizontal center line S and are displayed in individual shapes indicated by reference numerals 20e to 20h. The propulsion blade means 20 and the like perform a folding operation by applying a hydrodynamic force to the rear surface portions of the upper and lower blade pieces 21 and 21 '.

  Therefore, the individual propulsion blade means 20 and the like indicated by the reference numerals 20e to 20h on the upper side of the horizontal center line S receive the hydrodynamic force that is received when the folding operation is performed. Since the hydrodynamic force that the individual propulsion blade means 20 and the like indicated by reference numerals 20a to 20d receive when performing the deployment operation is much stronger, the turbine 10 rotates in the clockwise direction in FIG. Have the driving force to become.

  On the other hand, in the tide state Lw in FIG. 2, the individual propulsion blade means 20 indicated by reference numerals 20 a to 20 d located below the horizontal center line S among the many propulsion blade means 20 and the like. When the hydrodynamic force acts on the rear surface portion, the upper and lower blade pieces 21 and 21 'come to fold, and on the contrary, located above the horizontal center line S, indicated by reference numerals 20e to 20h The individual propulsion blade means 20 and the like that have been deployed will be deployed by the hydrodynamic force acting on the front surfaces of the upper and lower blade pieces 21 and 21 '.

  Therefore, the individual propulsion blade means 20 and the like indicated by the reference numerals 20e to 20h below the horizontal center line S receive a hydrodynamic force that is received when the folding operation is performed. Since the hydrodynamic forces that the individual propulsion blade means 20 and the like indicated by reference numerals 20e to 20h receive when performing the deployment operation are much stronger, the turbine 10 rotates in the clockwise direction in FIG. Have the driving force to become.

  That is, according to the present invention, a propulsive force in which the turbine 10 rotates only in one direction is obtained regardless of whether the tide is in the high tide state Hw or the low tide state Lw. Regardless of where the water flows, the turbine 10 can rotate to obtain propulsive power at any place.

  Therefore, in the turbine 10 of the present invention that operates as described above, when the moving member 27 is employed in each of the upper and lower blade pieces 21, 21 ′, as shown in FIG. 9B, the shaft hole 28 of the moving member 27 has a diameter larger than the diameter of the blade support shaft 14 so that a margin 28a is provided between the shaft hole 28 and the blade support shaft 14. As shown in Fig. 4, when the upper and lower blade pieces 21 and 21 'are unfolded and folded, the moving member 27 moves in the left-right direction, and the upper and lower blade pieces 21 and 21' are excellent. An unfolding and folding operation can also be performed.

  Further, as shown in FIG. 10A, the upper and lower blade pieces 21 and 21 ′ are connected to a ball 29 provided so as to be rotated by a moving member 27. As shown in b), when the upper and lower blade pieces 21 and 21 ′ are unfolded and folded, the upper and lower blade pieces 21 and 21 ′ move in the vertical direction. The pieces 21 and 21 ′ can be well expanded and folded, and the present invention is not necessarily configured as described above, and other structures and means are adopted. It is also possible.

  In the turbine 10 of the present invention, as shown in FIG. 11, the moving member 27 of the lower blade piece 21 ′ is pressurized in the direction of the stopper 15 by the elastic member 16 installed by being inserted into the blade support shaft 14. It can also be made to move. In this case, when the upper and lower blade pieces 21, 21 ′ are folded, the moving member 27 of the lower blade piece 21 ′ is moved in the direction of the stopper 15 by the elasticity of the elastic member 16.

  On the other hand, FIG. 12 shows a tidal hydroelectric generator 100 using the turbine 10 of the present invention.

  The tidal hydroelectric generator 100 of the present invention is configured such that one or more turbines 10 are installed in a vertical direction on one turbine shaft 11, and the turbine shaft 11 floats on the water surface Wa due to the buoyancy of the float 111. Electric energy is produced by transmitting a rotational force to the generator 120 that passes through the member 110 and is fixed to the support member 112.

  The floating member 110 is connected to the seabed fixing means 130 fixed to the seabed Wb by the wire 131.

  The seabed fixing means 130 may be a heavy concrete block as shown in FIG.

  However, as shown in FIGS. 13A and 13B, a desirable seabed fixing means 130 includes a bolt rod 132 to which a wire 131 is connected and an expanded inclined head 133, and the expanded inclined head 133. A tube body 134 having a large number of expanding pieces 136 provided between the lower end crack holes 135 to open outwardly and coupled so that the bolt rod 132 penetrates, and the bolt rod 132 above the tube body 134. It is desirable to use a washer member 137 to be inserted and a nut member 138 fastened to the bolt rod 132 at the top of the washer member 137.

  As shown by the solid line in FIG. 13A, the seafloor fixing means 130 shown in FIG. 13 has an expanded inclined head portion 133 of the bolt rod 132 on the expanded piece portion 136 at the lower end portion of the tube body 134. The bolt rod 132 is inserted into the hole of the tube body 134 to be hooked so as to be coupled, the washer member 137 is inserted into the bolt rod 132 on the upper side of the tube body 134, and the nut member 138 is fastened to the bolt rod 132. Thus, the parts are coupled so that there is no play between them.

  Next, the bolt rod 132 is hit so that both the tube 134 and the bolt rod 132 are driven into the sea bottom Wb. At this time, the washer member 137 is hooked above the sea bottom Wb and is driven to a place where it cannot be driven any more, and is fixed to the sea bottom Wb.

  Next, when the nut member 138 is continuously tightened so as to move in the direction of the sea bottom Wb, the nut member 138 is tightened with the washer member 137 supported on the sea bottom Wb. As shown in the phantom line in FIG. 12 (a), the state is forcibly raised upward.

  Therefore, the expansion inclined head portion 133 of the bolt rod 132 forcibly opens the expansion piece portion 136 of the tube body 134 to the outside as shown by the phantom line in FIG. The expanded piece 136 in the opened state as described above is fixed so as to prevent the seabed fixing means 130 from coming off from the seabed (Wa) and being detached.

  The length of the wire 131 is such that the floating member 110 can float up to the highest water level at the time of full tide in the sea area where the tidal hydroelectric generator 100 of the present invention is installed. The member 110 and the seabed fixing means 130 are connected.

  Therefore, the floating member 110 rises and rises as the water surface Wa rises at high tide, and comes down below the water surface Wa at low tide. However, the turbine 10 below the floating member 110 not only at high tide but also at low tide. Is immersed in water, the turbine 10 rotates to generate power not only when the high tide enters but also when the tide comes out.

  The present invention is also installed in a floating manner in rivers and rivers where the amount of water and flow velocity change from time to time, and can generate electricity.

  In other words, the turbine 10 of the present invention receives water flow while receiving and opening water from the front side of the upper and lower blade pieces 21 and 21 ′, so that the flowing water pressure (tidal force) is opened. The upper and lower blade pieces 21 and 21 ′ not only receive the hydrodynamic force, but if a large number of turbines 10 are installed in a row on one turbine shaft 11, the flow rate is somewhat slow. However, the driving force required for power generation can be sufficiently obtained.

  In particular, if the rotational force of the turbine shaft 11 is transmitted to the generator 120 via a speed increaser (not shown), the propulsive force required for power generation can be further obtained even if the flow rate is somewhat slow. As a result, it is possible to generate electricity even on rivers and rivers that have a slightly slower flow rate, or on the sea where high and low tides periodically flow, and can produce electrical energy.

  Therefore, according to the present invention, since the turbine 10 rotates only in one direction even if the flow direction of the tidal current changes, not only can the power generation be sustained unless the water flow stops, but also the tidal current and the water level of the river. Even if the height changes, it will be possible to generate power continuously, and not only can it be produced so that electric energy is relatively doubled compared to before, but also the power generation efficiency is greatly improved. You will be able to do it.

  In addition, the present invention does not install a permanent structure in a place where a flow velocity is formed, and can generate power in a state where a power generation facility or the like is levitated above the water surface. Therefore, a fixed power generation permanent structure is constructed. Because it is not necessary to do so, it will be possible to generate electricity without causing environmental changes and environmental changes.

  In addition, it is possible not only to produce the electric energy by floating the tidal hydroelectric generator of the present invention in any place where a tidal current is formed, but also in the upper part of the tidal hydroelectric generator, Alternatively, it is possible to additionally install a solar power generator so that more electric energy can be obtained.

  The present invention is not necessarily limited to the embodiments shown and described in the drawings, and can be implemented in various forms by those having ordinary knowledge in the technical field to which the present invention belongs. Therefore, it is obvious that a wide range of protection should be provided without departing from the scope of the claims.

10: turbine 11; turbine shaft 12: central member 13, 13 ': horizontal support member 14: blade shaft 15: stopper 16: elastic member 20: propulsion blade means 21, 21': upper and lower blade pieces 22: intermediate hinge portion 23, 23 ': Hinge piece 23a: Shaft hole 24: Blade spreading suppression piece 25: Hinge shaft 26: Hinge 26': Spring steel plate material 27: Moving member 28: Shaft hole 29: Ball 100: Tidal hydroelectric generator 110: Floating Member 111: Floating device 112: Support member 120: Generator 130: Submarine fixing means 131: Wire 132: Bolt bar 133: Expanded inclined head 134: Tubing body 135: Lower end crack hole 136: Expanded piece part 137: Washer Member 138: Nut member 211: Space portion 212, 212 ′: Fixing member 213: Hinge shaft 214, 271: Hinge shaft hole

Claims (2)

A center member (12) to which the turbine shaft (11) is fixed, a pair of horizontal support members (13, 13 ') fixed to be opposed to the upper and lower portions of the center member (12), and the pair of horizontal A large number of blade support shafts (14) are fixed at equal intervals around the turbine shaft (11) between the support members (13, 13 ') so that the blade support shaft (14) is at one point. One or more blade support shafts (14) are provided, and are supported by the blade support shafts (14) so as to be movable in the vertical direction, with the intermediate hinge portion (22) as a center in the vertical direction. The upper blade piece (21) and the lower blade piece (21 ′) arranged on the upper and lower sides are opened and folded in a vertical direction and include a plurality of propulsion blade means (20). ) Upper and lower blades (21, 21 ') A moving member (27) having a shaft hole (28) through which each blade support shaft (14) passes is provided so as to be reciprocally movable in the vertical direction. When the moving member (27) moves in the vertical direction, The lower blade pieces (21, 21 ') are connected to each other so as to rotate around the moving member (27);
The hinge shaft hole (271) at the rear of the moving member (27) inserted into the space (211) provided in each of the upper and lower blade pieces (21, 21 '), and fixing of both sides of the space (211) The upper and lower blade pieces (21, 21 ') are rotated around the hinge shaft (213) inserted into the hinge shaft hole (214) of the member (212, 213), or the moving member (27) The shaft hole (28) has a diameter larger than the diameter of the blade support shaft (14) so that there is a margin (28a) between the shaft hole (28) and the blade support shaft (14), or The lower blade piece (21, 21 ') is connected to a ball (29) provided to be rotated by the moving member (27), so that the moving member (27) moves in the vertical direction. -The lower blade piece (21, 21 ') is rotatable A turbine for tidal hydroelectric power generation characterized by comprising any one of the above.   The moving member (27) can be moved by being pressed in the direction of the stopper (15) by an elastic member (16) inserted and installed in the blade support shaft (14). The turbine for tidal hydropower generation according to claim 1.

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