JP5752527B2 - Hydroelectric power generation system - Google Patents

Description

  Embodiments of the present invention relate to a water current power generation system using, for example, ocean energy.

  As a power generation system using water, many methods are known, such as power generation using a height difference of a dam, power generation using sea wave power / tide, power generation using a osmotic membrane or a temperature difference. Among these, as a power generation system that can easily obtain large-capacity energy, a power generation system using water current energy such as tidal currents and ocean currents has been proposed, and is being developed ahead of part of Europe. .

  A water current power generation system using water energy includes, for example, a rotating shaft provided with blades (wings) and a generator that generates electric power by the rotation of the rotating shaft. Since such a water current power generation system operates in a state where it is submerged in the water flow, it is necessary to fix the blade and the rotating shaft in order to prevent an accident when the power generation system is installed or removed.

  As a technique for stopping a blade and a rotating shaft in a power generation system having a rotating shaft, it has been proposed to control the pitch of the blade, control the direction of the blade, or stop the rotation using a brake.

Japanese Patent No. 2824321 Japanese Patent No. 4690829 JP 2011-1112055 A JP 2008-196464 A Japanese Patent No. 4100520

  However, since the conventional technique for stopping the rotating shaft and the like requires a relatively complicated mechanism and brake device, there is a problem that it is difficult to apply to a water current power generation system that is used by submerging the entire system in water.

  An embodiment of the present invention was made to solve such a problem, and provides a water current power generation system that can easily fix a rotating shaft or stop rotation of the rotating shaft with a simple configuration. It is aimed.

  The hydroelectric power generation system according to the embodiment includes a rotor, a first wing portion having one end fixed to the rotor, and a second wing coupled to the first wing portion so as to be rotatable around a longitudinal axis. Department. The hydroelectric power generation system according to the embodiment includes a fixing mechanism that fixes the rotation of the first wing and the second wing so that the peripheral surfaces of the first wing and the second wing are continuous with each other. And a release mechanism for releasing the fixing by the fixing mechanism.

It is a figure showing composition of a water current power generation system of a 1st embodiment. It is a figure which shows the rotor cross section of the water current power generation apparatus in the water current power generation system of 1st Embodiment. It is a figure explaining blade stop operation in the water current power generation system of a 1st embodiment. It is a figure explaining blade stop operation in the water current power generation system of a 1st embodiment. It is a figure which shows the structure of the water current power generation system of 2nd Embodiment. It is a figure which shows the wing | tip end part of the water current power generation apparatus in the water current power generation system of 2nd Embodiment. It is a figure which shows the blade end part cross section of the water current power generation apparatus in the water current power generation system of 2nd Embodiment. It is a figure which shows the wing | tip end part of the water current power generation apparatus in the water current power generation system of 2nd Embodiment. It is a figure which shows the structure of the water current power generation system of 3rd Embodiment. It is a figure which shows the wing | tip end part of the water current power generation apparatus in the water current power generation system of 3rd Embodiment. It is a figure which shows the wing | tip end part of the water current power generation apparatus in the water current power generation system of 4th Embodiment. It is a figure which shows the structure of the water current power generation system of 5th Embodiment. It is a figure which shows the blade | wing cross section of the water current power generation apparatus in the water current power generation system of 5th Embodiment. It is a figure which shows the blade | wing cross section of the water current power generation apparatus in the water current power generation system of 5th Embodiment.

  A water current power generation system that generates power using tidal currents, ocean currents, and other water currents has a rotating shaft connected to the generator and a plurality of blades disposed at the end of the rotating shaft. The water current power generation system has a plurality of relatively large blades as compared with other power generation systems using water, and the entire power generation system needs to be submerged in relatively deep water.

  On the other hand, in the water in which the water current power generation system is arranged, a continuous ocean current or water current is generally generated. Therefore, when installing the power generation system, there is a possibility that the blade receives the water current and the rotation shaft starts to rotate. The same applies to the case where the hydroelectric power generation system is pulled up from the water for maintenance or the like and removed. In order to prevent accidents, it is necessary to stop the rotation of the blade and the rotating shaft during installation work and lifting work.

(First embodiment)
With reference to FIG. 1 thru | or 4, the water current power generation system of 1st Embodiment is demonstrated. The hydroelectric power generation system according to the first embodiment prevents rotation of blades when the system is submerged and installed.

  As shown in FIG. 1, the water current power generation system 1 of this embodiment includes a pair of water current power generation apparatuses 10 and 20. The water current generators 10 and 20 are connected to each other by a connecting member 50 and moored to the seabed 3 by a mooring rope 2. The water current power generation system 1 is caused to flow by the water flow F, but is maintained in a state of staying at a predetermined depth by the mooring rope 2.

  The water current power generation apparatus 10 includes a nacelle 100 for storing electrical equipment, a rotor 110, and a plurality of blades 120 having one end fixed to the rotor. The nacelle 100 is a casing having a watertight structure and has a predetermined buoyancy. Examples of devices to be stored include a generator, a control device, a speed change mechanism such as a speed increaser, and the like. The rotor 110 is connected to the generator via a speed change mechanism in the nacelle 100. A plurality of blades 120 are fixed to the end of the rotor 110. In the example shown in FIG. 1, the water current generator 10 includes a pair of blades 120 and rotates the rotor 110 by the water flow F.

  The water current generator 20 has the same configuration as that of the water current generator 10, and includes a nacelle 200 for storing electrical equipment, a rotor 210, and a plurality of blades 220 having one end fixed to the rotor. The blades 120 of the water current power generation apparatus 10 and the blades 220 of the water current power generation apparatus 20 are formed in opposite directions so that the rotors 110 and 210 rotate in opposite directions. By rotating the rotors 110 and 210 and the blades 120 and 220 in opposite directions, position control of the entire hydroelectric power generation system 1 is facilitated.

  An anti-rotation member 300 is connected to the rotors 110 and 210 of the water current generators 10 and 20, respectively. The rotation preventing member 300 functions to prevent rotation of the rotors 110 and 210 (or rotation of the blades 120 and 220) when the water current power generation system 1 is installed in water.

  As shown in FIG. 2, the rotation preventing member 300 includes a pulling bar member 340 and an arm member 330 formed at the end of the bar member 340 in the vertical direction. Bending portions 310 and 320 are formed at both ends of the arm member 330, respectively. The curved portions 310 and 320 each have a semicircular shape that opens in a common direction, and are formed in a size corresponding to the outer periphery of the rotors 110 and 210 of the water current generators 10 and 20. The interval between the curved portions 310 and 320 is formed substantially the same as the interval between the rotors 110 and 210. Fastening pins 312 and 322 are formed at the inner centers of the curved portions 310 and 320, respectively. On the other hand, retaining holes 112 and 212 are formed on the peripheral surfaces of the rotors 110 and 210 of the water current generators 10 and 20. The retaining hole 112 is formed at a position that does not interfere with the nacelle 100 and the wing 120. Similarly, the fastening holes 212 are formed at positions that do not interfere with the nacelle 200 and the wings 220.

  That is, as shown in FIG. 2, the rotors 110 and 210 are stopped so that the retaining holes 112 and 212 are oriented vertically in the longitudinal direction of the connecting member 50, and the retaining holes 112 and 212 and the retaining pins 312 and 322 are fitted. Thus, when the openings of the curved portions 310 and 320 are fitted to the peripheral surfaces of the rotors 110 and 210, the rotors 110 and 210 can be fixed (rotor locked state).

(Operation of the first embodiment)
The operation of the first embodiment will be described with reference to FIGS. As shown in FIG. 2, the curved portions 310 and 320 of the rotation preventing member 300 are fitted to the rotors 110 and 210 of the water current generators 10 and 20 to be in the rotor locked state. Thereafter, when the hydroelectric power generation system 1 is submerged in water with the rotors 110 and 210 fixed (FIG. 3), positive and negative pressures are generated in the blades 120 and 220 by the water flow F, and the rotors 110 and 210 are rotated. Force to generate.

  Here, since the wings 120 and 220 are formed in a direction in which the rotors 110 and 210 rotate in the opposite directions, the retaining pins 312 and 322 of the curved portions 310 and 320 are pushed or pulled along the connecting member 50. Force acts. Therefore, it is possible to prevent the rotors 110 and 210 from rotating even with a simple method of fitting the retaining pins 312 and 322 into the retaining holes 112 and 212. That is, the water current power generation system 1 can be introduced without rotating the blades 120 and 220.

  When the water current power generation system 1 enters water to a predetermined depth, the rotor members 110 and 210 are released from the rotor locked state by pulling the bar member 340 upward (FIG. 4). In other words, the rotors 110 and 210 start rotating due to the action of the water flow F on the blades 120 and 220.

  In the embodiment described above, the curved portions 310 and 320 of the rotation preventing member 300 are fitted to the rotors 110 and 210 from above, but the present invention is not limited to this. If the rotation prevention member 300 locks the rotors 110 and 210 when the water current power generation system 1 is submerged in the water and the water flow generation system 1 is submerged, the rotation prevention member 300 can be easily pulled out from below. Even if it fits together, it may fit from both sides. In the embodiment described above, the rod member 340 that pulls up the rotation preventing member 300 from the water is provided, but the present invention is not limited to this. Instead of the rod member 340, a rope or chain having a strength capable of pulling up the rotation preventing member 300 may be provided.

  According to the water current power generation system of this embodiment, since the rotation of the blades and the rotor can be fixed in the installation, an accident can be prevented in advance.

(Second Embodiment)
Next, the water current power generation system of the second embodiment will be described in detail with reference to FIGS. The water current power generation system according to the second embodiment prevents rotation of the blades during system maintenance and removal. The hydroelectric power generation system of the second embodiment is obtained by changing the configuration of the blades in the hydroelectric power generation system 1 of the first embodiment. In the following description, elements common to the first embodiment are denoted by common reference numerals, and redundant description is omitted.

  Similar to the first embodiment, the water current generator of the second embodiment has a pair of water current generators. Since the pair of water current generators have a common configuration, one of the water current generators will be described as a representative in the following description.

  FIG. 5 shows an enlarged view of the main part of the water current generator in the second embodiment. As shown in FIG. 5, the water current generator 12 in the second embodiment includes a transmission mechanism 130, a generator 140, a connecting shaft 145 that connects the transmission mechanism 130 and the generator 140, and a hydraulic mechanism 150. These are stored in the nacelle 100. A hub 114 is disposed at one end of the rotor 110 (the end exposed from the nacelle 100), and the hub 114 fixes one end of the blade 120. The wings 120 are fixed so as to extend radially around the hub 114. The wing 120 includes a wing body 121 having one end fixed to the hub 114 and a movable wing 122 connected to the other end of the wing body 121. As shown in FIG. 5, a transmission mechanism 130 is connected to the other end of the rotor 110 (an end portion in the nacelle 100), and rotational force is transmitted to the generator 140 via the transmission mechanism 130 and the connecting shaft 145. Is done.

  A pipe 152 is connected to the hydraulic mechanism 150, and the pipe 152 is connected to one end of an in-blade pipe 154 provided in the wing 120 through the transmission mechanism 130 and the rotor 110. The other end of the blade inner pipe 154 is connected to a separation mechanism 160 disposed at a connecting portion between the blade body 121 and the movable blade 122.

  When the blade 120 fixed to the hub 114 receives the water flow F, the rotor 110 rotates in a predetermined direction. The rotation of the rotor 110 is accelerated or decelerated by the speed change mechanism 130 and transmitted to the generator 140 via the connecting shaft 145. The generator 140 generates electric power through a transmission line (not shown). On the other hand, the pipe 152 connected to the hydraulic mechanism 150 is connected to the wing pipe 154 via the speed change mechanism 130. The wing inner pipe 154 is connected to the separation mechanism 160. That is, the hydraulic pressure generated by the hydraulic mechanism 150 is transmitted to the separation mechanism 160 via the pipe 152 and the blade inner pipe 154.

  6 and 7 show the main part of the separation mechanism 160. As shown in FIGS. 6 and 7, the blade body 121 and the movable blade 122 are connected by a rotary joint 162 and are formed in a shape in which their outer peripheral surfaces are continuous. That is, the positive pressure and the negative pressure of the wing body 121 and the movable wing 122 are aligned to integrally form a wing of a water current power generation apparatus.

  The rotary joint 162 has a shape in which both ends of the cylindrical member are formed in a circular bowl shape, and has the same shape formed along the longitudinal direction of the blade 120 at the boundary between the blade body 121 and the movable blade 122. It is arranged in the space. The rotary joint 162 serves to pivotably connect the movable wing 122 to the wing body 121 about itself. In addition, the hook-shaped end of the rotary joint 162 and the space having the same shape formed in the blade main body 121 and the movable blade 122 are engaged to prevent the movable blade 122 from being detached from the blade main body 121. do.

  6 and 7, the blade inner pipe 154 penetrates the boundary surface of the blade main body 121 and the movable blade 122 along the longitudinal direction of the blade 120 so as to sandwich the rotary joint 162, and the blade 122 It extends to the end (the end of the movable blade 122). A pin 164 is temporarily installed in the blade inner pipe 154 so as to straddle the boundary surface between the blade body 121 and the movable blade 122. The pin 164 has substantially the same diameter as the blade inner pipe 154 and is fixed by friction with the inner wall of the blade inner pipe 154. That is, the pin 164 functions to prevent the wing body 121 and the movable wing 122 from rotating, and to fix the outer peripheral surfaces of the wing body 121 and the movable wing 122 in a predetermined position.

  In the water current generator in the water current power generation system of this embodiment, when the hydraulic mechanism 150 is operated using a control line (not shown), the fluid in the pipe 152 and the wing pipe 154 acts, and the pin 164 in the separation mechanism 160 is moved. Push to the movable wing 122 side. As a result, the movable blade 122 can rotate about the rotary joint 162, and therefore, as shown in FIG. In this state, the outer peripheral surfaces of the blade main body 121 and the movable blade 122 are not continuous, and the positive pressure and the negative pressure are discontinuous. That is, the rotation of the rotor 110 can be stopped by stalling the movable blade 122 farthest from the rotor 110 in the blade 120 to cause boundary layer separation.

  In addition, although the example which moves the pin 164 using the hydraulic mechanism 150 was demonstrated above, it is not limited to this. An environmentally friendly fluid such as water may be used. Further, a valve may be provided on the blade inner pipe 154 at the boundary surface between the blade main body 121 and the movable blade 122 so that the fluid does not leak from the blade inner pipe 154 when the movable blade 122 rotates.

(Third embodiment)
Next, with reference to FIGS. 9 and 10, the water current power generation system of the third embodiment will be described in detail. The hydroelectric power generation system of the third embodiment is obtained by changing the control method of the separation mechanism in the hydroelectric power generation system 1 of the second embodiment. In the following description, elements common to those in the second embodiment are denoted by common reference numerals, and redundant description is omitted.

  FIG. 9 shows an enlarged main part of the water current generator in the third embodiment. As shown in FIG. 9, the water current generator 14 in the third embodiment includes a winding mechanism 170 instead of the hydraulic mechanism 150 in the second embodiment. The winding mechanism 170 includes a motor or the like and is configured to wind up a rope or the like. A pipe 172 is connected to the winding mechanism 170, and the pipe 172 is connected to one end of an in-blade pipe 174 provided in the wing 123 via the speed change mechanism 130 and the rotor 110. The other end of the blade inner pipe 174 is connected to a separation mechanism 162 disposed at a connecting portion between the blade body 124 and the movable blade 125. That is, the pipe 172 connected to the take-up mechanism 170 is connected to the blade inner pipe 174 via the speed change mechanism 130.

  FIG. 10 shows a main part of the separation mechanism 162. As shown in FIG. 10, a connecting rope 176 is passed through the blade inner pipe 174. One end of the connecting rope 176 is connected to the end of a pin 164 fixed so as to straddle the boundary surface between the blade main body 124 and the movable blade 125 in the blade inner pipe 174. The other end of the connecting rope 176 is connected to the winding mechanism 170 through the blade inner pipe 174 and the pipe 172. That is, the winding mechanism 170 can move the position of the pin 164 by winding the connecting rope 176. Since the pin 164 of this embodiment is pulled to the blade main body 124 side of the blade inner pipe 174 by the connecting rope 176, the fixing of the movable blade 125 is released. Therefore, as shown in FIG. The pipe 174 does not need to be extended to the vicinity of the end of the movable blade 125. That is, it is sufficient that the pin 164 has a length enough to be fixed at a predetermined position.

  In the water current generator in the water current power generation system of this embodiment, when the winding mechanism 170 is operated using a control line (not shown) to start the winding of the connecting rope 176, the connecting rope 176 in the pipe 172 and the wing pipe 174 is connected. As a result, the pin 164 in the separation mechanism 162 is pulled toward the blade main body 124 side. As a result, since the movable blade 125 can rotate about the rotary joint 162, the angle of attack different from that of the blade body 124 is obtained by the action of the water flow F as in the example shown in FIG. By rotating the movable blade 125 farthest from the rotor 110 at the blade 123 to cause boundary layer separation, the rotation of the rotor 110 can be stopped.

  Further, in this embodiment, since no fluid is used unlike the hydraulic mechanism, even if the movable blade 125 rotates and the end surface of the blade inner pipe 174 is exposed, the water in which the water current power generation system is installed is contaminated. There is no. In addition, an equivalent effect can be obtained by a simpler mechanism than in the second embodiment.

(Fourth embodiment)
Next, the water current power generation system of the fourth embodiment will be described in detail with reference to FIG. The hydroelectric power generation system of the fourth embodiment is obtained by changing the method of connecting the movable wing 122 to the wing body 121 in the hydroelectric power generation system of the second embodiment. In the following description, elements common to those in the second embodiment are denoted by common reference numerals, and redundant description is omitted.

  FIG. 11 shows the main part of the separation mechanism 163 in the water current generator of the fourth embodiment. As shown in FIG. 11, the wing body 121 and the movable wing 126 are connected by a rotary joint 164. The rotary joint 164 has a shape in which both ends of the cylindrical member are formed in a circular bowl shape, and is arranged in a space formed along the longitudinal direction of the blade at the boundary between the blade body 121 and the movable blade 126. It is installed. At the boundary surface between the blade main body 121 and the movable blade 126, a space having the same shape as the rotary joint 164 is formed at the end of the blade main body 121, and the rotary joint 164 is accommodated. A space having a shape obtained by extending the flange portion of the joint 164 in the longitudinal direction is formed, and the rotary joint 164 is accommodated. The rotary joint 164 serves to connect the movable blade 126 to the blade body 121 so as to be rotatable about itself. In this embodiment, the movable blade 126 is fixed mainly by the frictional force of the pin 164 in the blade inner pipe 154.

  That is, as shown in FIG. 11, as a result of the pin 164 being moved in the blade inner pipe 154 to the movable blade 126 side by the hydraulic mechanism 150, the movable blade 126 is not only rotatable but also the longitudinal direction of the blade 120. It is configured to be able to protrude. When the wing 120 is rotating, centrifugal force is acting on the movable wing 126, so when the pin 164 moves and the fixed state of the movable wing 126 is released, the movable wing 126 jumps to the outer peripheral side of the wing 120. . As a result, a larger torque is generated at the end portion of the entire blade 120 (the end portion of the movable blade 126), and the rotation of the rotor 110 can be stopped more strongly by causing the blade 120 to stall more strongly.

  In the above description, the movable blade 126 can be ejected by taking a space on the movable blade 126 side out of the space in which the rotary joint 164 is accommodated. However, the present invention is not limited to this. The space on the wing body 121 side may be formed larger, or the space on both the wing body 121 and the movable wing 126 may be formed larger.

  Moreover, in the water current power generation system of the fourth embodiment, the movable blades can jump out in the outer peripheral direction in the water current power generation system of the second embodiment, but the present invention is not limited to this. The same effect can be obtained even if the movable blade structure capable of popping out is applied to the water current power generation system of the third embodiment.

(Fifth embodiment)
Next, with reference to FIG. 12 thru | or 14, the water flow power generation system of 5th Embodiment is demonstrated in detail. The hydroelectric power generation system according to the fifth embodiment prevents the blades from rotating during system maintenance or removal. The hydroelectric power generation system of the fifth embodiment is obtained by changing the configuration of the blades 120 and 220 in the hydroelectric power generation system of the second embodiment. In the following description, elements common to those in the second embodiment are denoted by common reference numerals, and redundant description is omitted.

  FIG. 12 shows an enlarged main part of the water current generator in the fifth embodiment. As shown in FIG. 12, in the water current generator 16 in the fifth embodiment, a hub 114 is disposed at one end of the rotor 110, and the hub 114 fixes one end of the blade 127. The wing 127 includes a wing body 128 and a wing trailing edge portion 129 connected to a rear edge portion of the wing body 128 (an edge portion on the downstream side of the wing 127 with respect to the water flow F). In other words, the blade 127 is composed of the blade body 128 and the blade trailing edge portion 129 with a boundary surface along the longitudinal direction as a boundary, and the outer peripheral surfaces thereof are formed to be continuous with each other. The wing body 128 and the wing trailing edge 129 may be provided with a lock mechanism that fixes each of the outer peripheral surfaces so that they are continuous during normal operation.

  A pipe 152 is connected to the hydraulic mechanism 150, and the pipe 152 is connected to one end of a blade pipe 154 provided in the blade 127 via the speed change mechanism 130 and the rotor 110. The other end of the blade inner pipe 154 is connected to a separation mechanism 180 disposed at a connecting portion of the blade body 128 and the blade trailing edge 129. A plurality of separation mechanisms 180 may be provided.

  The pipe 152 connected to the hydraulic mechanism 150 is connected to the wing pipe 154 via the speed change mechanism 130. The wing inner pipe 154 is connected to the separation mechanism 180. That is, the hydraulic pressure generated by the hydraulic mechanism 150 is transmitted to the separation mechanism 180 via the pipe 152 and the blade inner pipe 154.

  13 and 14 show a cross section of the main part of the separation mechanism 180 in the blade 127. As shown in FIGS. 13 and 14, the blade body 128 and the blade trailing edge portion 129 are connected by a hinge 191 disposed along the longitudinal direction of the blade 127, and the pressure surface direction of the blade 127 (by the water flow F). It is configured to bend toward the surface receiving pressure.

  The separation mechanism 180 disposed in the blade body 128 is provided with a cylinder mechanism 182 and a piston mechanism 184 that is combined with the cylinder mechanism 182 and expands and contracts toward the blade trailing edge portion 129. The cylinder mechanism 182 is connected to the blade inner pipe 154, and the hydraulic mechanism 150 applies hydraulic pressure to the piston mechanism 184 via the cylinder mechanism 182. The piston mechanism 184 is accommodated in spaces 192 and 193 formed at the boundary surface between the blade body 128 and the blade trailing edge portion 129. Of the two spaces 192 and 193, the space 192 is formed in a size and shape that does not hinder the movement of the piston mechanism 184, and the space 193 has a margin so that the blade trailing edge 129 can be bent by the movement of the piston mechanism 184. It is formed in a size.

  In the water current generator in the water current power generation system of this embodiment, when the hydraulic mechanism 150 is operated using a control line (not shown), the fluid in the pipe 152 and the blade pipe 154 acts, and the cylinder mechanism 182 in the separation mechanism 180. Drives the piston mechanism 184. As a result, the blade trailing edge 129 is separated and bent from the blade body 121, and the entire blade body 127 is stalled to cause boundary layer separation, thereby stopping the rotation of the rotor 110. The end of the piston mechanism 184 may be connected by a hinge or the like on the inner wall surface of the space 193 of the blade trailing edge 129. In this case, the wing body 121 and the wing trailing edge portion 129 can easily maintain an integral shape during normal operation.

  Further, in the water current power generation system of the fifth embodiment, the blade trailing edge can be bent using the hydraulic mechanism of the water current power generation system of the second embodiment, but the present invention is not limited to this. The same effect can be obtained even if the blade structure of the fifth embodiment is applied to the hydroelectric power generation system of the third embodiment and the blade trailing edge can be bent using the pin / connecting rope and the winding mechanism. Can do.

  According to the water current power generation system of the embodiment described above, it is possible to provide a water current power generation system that can easily fix the rotating shaft or stop the rotation of the rotating shaft with a simple configuration.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Hydroelectric power generation system 1, 10, 20 ... Hydroelectric power generation apparatus, 100/200 ... Nacelle, 110/210 ... Rotor, 112 ... Retaining hole, 114 ... Hub, 120/220 ... Wing, 121 ... Wing body, 122 ... Movable Wings, 130 ... transmission mechanism, 140 ... generator, 145 ... connecting shaft, 150 ... hydraulic mechanism, 152 ... pipe, 154 ... pipe in blade, 160 ... separation mechanism, 162 ... rotary joint, 164 ... pin.

Claims (5)

A rotor,
A first wing having one end fixed to the rotor;
A second wing portion coupled to the first wing portion so as to be rotatable around a longitudinal axis;
A fixing mechanism that fixes the rotation of the first wing part and the second wing part such that the peripheral surfaces of the first wing part and the second wing part are continuous with each other;
A release mechanism for releasing the fixing by the fixing mechanism ,
The first wing portion and the second wing portion are each formed with a hole penetrating each connecting surface,
The fixing mechanism comprises a pin disposed in a hole that penetrates the connecting surface,
The release mechanism has a fluid supply mechanism that removes the pin through the hole.
Water current power generation system according to claim. The fluid supply mechanism, water current power generation system of claim 1, wherein the supplying oil or high pressure water as the fluid. A rotor,
A first wing having one end fixed to the rotor;
A second wing portion coupled to the first wing portion so as to be rotatable around a longitudinal axis;
A fixing mechanism that fixes the rotation of the first wing part and the second wing part such that the peripheral surfaces of the first wing part and the second wing part are continuous with each other;
A release mechanism for releasing the fixing by the fixing mechanism;
Comprising
The first wing portion and the second wing portion are each formed with a hole penetrating each connecting surface,
The fixing mechanism is
A pin disposed in a hole passing through the connecting surface;
It consists of a rope connected to the end of the pin and passed through the hole,
The release mechanism has a winding mechanism for winding the rope through the hole.
Water current power generation system characterized by A rotor,
A first wing having one end fixed to the rotor;
A second wing portion coupled to the first wing portion so as to be rotatable around a longitudinal axis;
A fixing mechanism that fixes the rotation of the first wing part and the second wing part such that the peripheral surfaces of the first wing part and the second wing part are continuous with each other;
A release mechanism for releasing the fixing by the fixing mechanism;
Comprising
The second wing portion is connected to the first wing portion so as to be rotatable and projectable with respect to each other about a longitudinal axis,
The fixing mechanism fixes the protrusion of the second wing part in addition to the rotation of the first wing part and the second wing part.
Water current power generation system characterized by A pair of generators each having a rotor;
A pair of blades that generate positive pressure and negative pressure in directions in which each end of each of the rotors is fixed and each of the rotors rotates in reverse to each other when receiving a water flow;
Retaining holes formed on the respective circumferential surfaces of the rotor;
Arm members corresponding to the intervals of the rotors, a pair of curved portions formed at both ends of the arm members and corresponding to the shapes of the peripheral surfaces of the rotors, and retaining holes formed on the peripheral surfaces of the rotors And a convex portion formed on the inner peripheral surface of the curved portion, and a rotation preventing mechanism in which the curved portion and the convex portion are meshed with the rotor and the retaining hole portion, respectively. A water current power generation system.

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