KR101542696B1 - Wave power generating apparatus - Google Patents

Abstract

A wave power generating apparatus is disclosed. The wave power generating apparatus according to an exemplary embodiment of the present invention comprises: a floating body capable of floating on the sea; a motion converting part including at least one centering shaft, which extends by a certain length in a depth direction from a coupler arranged on the opening part of the floating body, and including a second connection shaft arranged to intersect with the first connection shaft of the coupler so as to convert the shaking motion of the floating body into a rotating motion; and a power generating part including a first power generator connected to the first connection shaft and a second power generator connected to the second connection shaft to generate electricity by the rotating force of the first and second connection shafts.

Description

Wave power generating apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power generating device that generates electricity using fluctuation energy of a wave.

Generally, electric power generation methods include hydroelectric power generation using hydroelectric power, thermal power generation using fossil fuel, and nuclear power generation using nuclear power. These development methods require a large amount of energy source to operate large-scale power generation facilities and power generation facilities, and there are restrictions on installation sites.

In particular, fossil fuels such as petroleum and coal as sources of energy used for thermal power generation cause problems such as depletion of resources, and their use is not permanent.

As the problems of depletion of fossil fuels and environmental pollution are highlighted, it is possible to generate electricity using natural energy directly, and it is required to develop alternative energy that does not require large-scale power plant installation.

As such devices using alternative energy, power generation devices capable of utilizing environmentally-friendly and permanent energy sources using natural energy such as solar heat, tidal power, wave power, wind power and water power are being developed.

Among these power generation apparatuses, the wave power generation apparatus which generates power by using the wave power converts the kinetic energy of the float moving due to the fluctuation of the wave to produce electric energy.

An embodiment of the present invention is to provide a wave power generator capable of increasing power generation efficiency by converting swinging energy of a wave into two or more rotational motions.

Another embodiment of the present invention is to provide a wave power generator capable of producing electricity in a state where it is free to float freely along an ocean current while being not fixed to the sea floor and a floating position in a specific region of the sea surface is kept constant .

According to one aspect of the present invention, a floatable float; And a second connecting shaft having at least one central holding axis extending a predetermined length in a direction perpendicular to the water surface from a coupler disposed in the opening of the float and arranged to be orthogonal to the first connecting shaft of the coupler, A motion switching unit for converting a swing motion of the fluid into a rotational motion; And a second generator connected to the first connection shaft and a second generator connected to the second connection shaft to generate electric power by the rotational force of the first connection shaft and the second connection shaft; And a position control unit positioned below the sea surface to generate a propulsive force by the rocking energy of the wave and connected to the motion conversion unit via a mooring member having a predetermined length, And controls the position of the floating fluid suspended in the waveguide to be limited within a certain range.

At this time, the central holding shaft may have at least one weight at the lower end.

At this time, the coupler includes a pair of left and right support portions forming a first shaft hole in which the first connection shaft is assembled, and a second shaft hole in which an end of the second connection shaft is assembled is formed in the middle of the length of the first connection shaft And a thick portion may be provided.

At this time, the drive shafts extending from the stator of the first and second generators may be integrally provided with the first and second connection shafts or may be detachably coupled to the ends of the first and second connection shafts.

Here, the center holding axis may include a first resistance plate whose one end is fixed so as to be disposed in parallel with the first connection axis in the middle of the length, or a second resistance plate whose one end is fixed so as to be disposed in parallel with the second connection axis can do.

At this time, the first resistance plate or the second resistance plate may be fixed at one end to a plate fixing table provided at the middle of the center holding axis.

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In this case, the position control unit is connected to the motion switching unit via the mooring member. A propelling vane pivotally installed about a rotational axis perpendicular to a straight direction of the propelling frame; And a direction key provided at an angle to the propelling frame so as to switch the traveling direction of the propelling frame in a curved direction.

In this case, the propulsion frame may include a connection frame connected to maintain a gap between upper and lower frames arranged side by side in pairs.

At least one of the upper and lower frames may be spaced apart in the longitudinal direction of the frame.

Here, the position control unit may include a steering unit to convert the traveling direction of the propelling frame into a straight direction and a curved direction, and the steering unit may include a chamber provided in the propelling frame; And a steering motor member disposed in the inner space of the chamber for rotationally displacing a rotation axis of a direction key that is rotatably assembled to the propelling frame.

The wave generator according to the embodiment of the present invention converts at least two or more swing motions due to rolling and pitching generated in the float due to oscillation of the wave into a first rotational motion and a second rotational motion It is possible to increase the power generation efficiency by performing the electric generation by the rotational motion in a complex manner.

In addition, since the floating fluid and the power generation unit can be controlled within a limited range so as not to be floated in the algae within a certain range by using the propulsion force generated by the rocking energy of the waves below the sea surface, The mooring part can be replaced.

In addition, it is possible to precisely and continuously observe by the meteorological equipment in the low-cost offshore area, and to move the float as required.

1 is an overall perspective view showing a wave power generator according to an embodiment of the present invention.
2 is a perspective view illustrating a direction switching unit employed in the wave power generator according to an embodiment of the present invention.
3 is a cross-sectional perspective view illustrating a direction switching unit employed in a wave power generator according to an embodiment of the present invention.
4 is an operational state diagram illustrating a power generation state during a rolling motion of a float in a wave generator according to an embodiment of the present invention.
FIG. 5 is an operational state diagram illustrating a power generation state when the auxiliary fluid is pivoted and rocked in the wave power generator according to the embodiment of the present invention.
6 is a perspective view illustrating a position control unit applied to a wave power generator according to an embodiment of the present invention.
7 is an exploded perspective view illustrating a position control unit applied to a wave power generator according to an embodiment of the present invention.
8A and 8B are schematic diagrams showing an operation state of a position controller applied to a wave power generator according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 to 5, a wave generator 1 according to an embodiment of the present invention includes a float 10, a motion switching unit 20, and a power generator 30.

As shown in FIG. 1, the float 10 may be formed as a portion of a predetermined size that floats and floats on the surface of water. The float 10 can support the weight of the entire wave power generator The buoyancy can be designed to have a degree of buoyancy.

The float 10 is shown to be composed of a separate base plate 11 and a floating structure 12 for generating buoyancy so that an electric field system such as an observation instrument can be mounted. However, the present invention is not limited to this, And the floating structure may be integrally provided or may be provided in various forms.

A battery 13 may be installed on the base plate 11 corresponding to the upper portion of the float 10. The battery 13 may be connected to the first and second generators 30, 31 and 32, respectively, to store electricity generated by the power generation unit, and the stored electricity can be used as a power source for the electric field system or other driving sources.

In this embodiment, the battery 13 is disposed above the float 10, but the present invention is not limited thereto. The battery 13 may be installed at an upper portion of the float 10, But may also be located in the lower portion of the float 10 or in water if formed in a watertight manner.

As shown in FIGS. 2 and 3, the movement switching unit 20 includes a coupler 25 disposed in an opening 15 passing through the center of the body of the float 10 to a predetermined size, And at least one central holding axis 26 extending downward a certain distance in the water depth direction to provide an external force to maintain the vertical state in its own weight direction.

At least one weights 29 are provided on the center holding shaft 26 so as to maintain the vertical state below the sea level in the self-weight direction regardless of the rolling motion and the pitching motion of the float 10 due to the oscillation energy of the waves. Stage.

The weights 29 may be integrally connected to the lower ends of the center holding shafts 26 or may be integrally connected to the center holding shafts 26 so as to replace and attach various types of weights having different weights depending on the lifting force of the float. 26 may be selectively provided with a female screw portion that is screwed with a male screw portion formed at a lower end of the female screw portion 26. [

The upper end of the center holding shaft 26 is illustrated as having an upper end threadedly coupled to an assembling hole formed through the coupler and having a loosening preventing nut 26a. However, the present invention is not limited to this, And may be provided in various types of coupling structures capable of being attached / detached between shafts.

And a first resistance plate 23a having one end fixed to be disposed in parallel with the first connection axis 21 in the middle of the center holding axis 26, And a second resistance plate 23b whose one end is fixed so as to be arranged in parallel with the second connection axis 22 while forming a right angle.

The first and second resistance plates 23a and 23b may be formed of a substantially rectangular plate so as to minimize the movement of the centering axis 26 by generating a resistance against algae occurring below the sea level.

The first and second resistance plates 23a and 23b are fixed to the plate fixing table 24 having a substantially rectangular cross section fixed at the middle of the length of the center holding shaft 26 with one end However, the present invention is not limited to this, and the upper and lower positions may be different from each other on at least two or more plate holding tables arranged vertically.

The plate holding table 24 is movably assembled and adjusted in position on the center holding shaft 26 so as to vary the positions of the first and second resistance plates 23a and 23b, And may be provided to be fixed to the holding shaft.

The center holding shaft 26 extending downward from the coupler 25 disposed in the opening 15 of the float 10 is always vertically moved in its own weight direction by the weight 29 connected to the lower end And the first and second resistance plates 23a and 23b which hit the algae generated below the sea surface while generating a reaction force against the algae to minimize the movement of the centering shaft 26. [

Therefore, the float 10 can be repeatedly rotated in the rolling direction or repeatedly rotated in the pitching direction due to the free oscillation energy of the wave.

The coupler 25 is disposed substantially parallel to the sea surface and includes a first connecting shaft 21 forming a rotation center in the rolling direction R during a rolling motion of the float 10 generated by the oscillation energy of waves, And a plurality of first connecting shafts 21 which are arranged at substantially right angles to each other and which are arranged to intersect the rotation center P of the pitching direction P during repetitive pitching motion of the float 10, And a second connecting shaft 22 constituting a connecting shaft.

The coupler 25 includes a pair of left and right supports 25a and 25a formed with first shaft holes 25b and 25b in which the first connection shaft 21 is difficult to rotate, Has a second shaft hole (27a) in which the end of the second connection shaft (22) is assembled with difficulty in rotation, and a thick portion (27) is provided in the middle of the length.

At this time, the first connection shaft 21 is connected to the first shaft hole 25b, 25b through a key member so as to be difficult to rotate, and the second connection shaft 22 is connected to the second shaft hole 27a Although shown as being connected via a key member so as to be difficult to rotate, it is possible to weld or be coupled as a fastening member such as a set screw.

The power generating unit 30 includes a first generator 31 connected to the first connecting shaft 21 of the coupler 25 and a second connecting shaft 21 connected to the first connecting shaft 21, And a second generator (32) connected to the second generator (22).

The first and second generators 31 and 32 include magnets or coils and include a rotor disposed in the generator body and a rotor disposed in the rotor.

Although the driving shafts extending from the stator are shown as being integrally provided with the first and second connecting shafts 21 and 22, the present invention is not limited thereto. And may be detachably coupled to the ends of the first and second connection shafts, respectively.

In addition, in order to stably support the movement of the first and second generators repeatedly turned in the rolling direction or the pitching direction, a bearing block is provided in the drive shaft extending from the stator of the first and second generators 31 and 32 Respectively.

Accordingly, the float 10 floated on the sea surface repeatedly oscillates in the rolling direction R with the first connection shaft 21 as the first rotation center due to the oscillation energy of the wave, (220) as a second rotation center in the pitching direction (P).

At this time, the float in the rolling direction and the pitching direction can be selectively or integrally formed by external conditions such as sea breeze and algae.

On the other hand, the coupler (25) coupled with the first and second connecting shafts (21, 22) makes it difficult to rotate the first and second connecting shafts (21, 22) by the weights (29) And maintains a stationary state at the opening of the float by the central holding axis which is kept vertical regardless of the swinging motion of the float (10).

4, the float 10 floated on the sea and the first generator 31 installed in the float 10 are arranged in the rolling direction R, While the stator of the first generator 31 connected to the first connecting shaft 21 of the coupler 25 is connected to the coupler 25 by a weight which is a vertical holding member, The power is generated by the relative rotation between the rotor and the stator in the first generator 31. In this case,

5, the float suspended in the sea and the second generator 32 provided thereon pivot in the pitching direction P, while the second connecting shaft 22 of the coupler 25 Since the stator of the connected second generator tries to remain stationary by the weight and the centering shaft together with the coupler 25, the power is generated by the relative rotation between the rotor and the stator in the second generator 32 .

Accordingly, when a wave is generated in a state where the float 10 is placed on the sea surface, and the wave generator 1 according to the embodiment of the present invention is swung in the rolling direction and the pitching direction, Since the power generation is performed by the relative movement between the stator connected to the first and second connection shafts and the rotor of the generator that swings together with the float, the power generation can be continuously performed with a simple structure.

As shown in FIGS. 6 and 7, the wave generator 1 includes a position controller (not shown) for controlling the position of the float 10 floated on the water due to the propulsive force in the straight- (40).

The position control unit 40 may be positioned below the sea surface to generate propulsive force due to the oscillation energy of the wave, and may be connected to the motion switching unit 20 through a mooring member 41 having a predetermined length.

Here, the mooring member is connected to the weight 29 provided at the lower end of the center holding shaft, but the present invention is not limited thereto and may be connected to the center holding shaft or other member. ,

The position control unit 40 includes a propelling frame 42 connected to the other end of the mooring member 41 having one end connected to the motion switching unit 20 and a hinge 43 fixed to the propelling frame 42, A plurality of propelling vanes 45 which are rotatably assembled via the member 44 to generate propulsive force by the oscillation energy of the waves and propulsion vanes 45 which are advanced in one direction by the propulsive force caused by the rotation of the propelling vanes 45 And a direction key 46 disposed at an angle to the propelling frame 42 so as to switch the traveling direction of the propelling frame 42 in a curved direction.

The mooring member 41 is made of an elastic band or elastic wire having a predetermined length and is made of a material capable of elastic deformation so as to flexibly cope with a distance change between the motion switching unit 20 and the propelling frame 42 And can be made of wires that are difficult to construct or expand.

The propelling frame 42 includes upper and lower frames 42a and 42b arranged in parallel with upper and lower pairs so as to limit the rotation range of the propelling vane 45 which is rotated up and down via the hinge member 44 And a connection frame 42c for connecting the connection frame 42c so as to maintain a constant distance therebetween.

A plurality of fixing tables 43 are fixedly installed at predetermined intervals in the lower frame 42b in accordance with the number of installation of the propelling vanes 45 and vertically rotated on the inner surfaces of the upper and lower frames 42a and 42b A shock absorbing member such as a rubber may be provided so as to absorb shock when the pushing vane 45 is in contact with the free end.

It is preferable that the fixing table 43 and the hinge member 44 are relatively larger than the width of the propelling frame so as to increase the coupling force between the propelling blades 45 and the propelling frame 42 .

The propelling vanes 45 may be formed of a substantially rectangular plate which is arranged to be orthogonal to the longitudinal direction of the propelling frame 42 and extends a predetermined length to both left and right sides.

The hinge member 44 provided to the pushing vane 45 may include a hinge member having a plate member fixed at one end to the fixing member and a pin member rotatably connecting the plate member fixed to the pushing vane, And various types of connection hinge pin structures that can rotate the free end of the propelling blade by the oscillation energy of the wave can be selected and employed.

As shown in FIG. 6, the direction key 46 converts the straight direction of the propelling frame 42 advancing in one direction by the propulsive force generated in the propelling vane 45 into a curved direction, It is preferable that the driving frame 10 is arranged not to be arranged in parallel with the propelling frame 42 but to be inclined at a certain angle? With respect to the linear direction D so as to be located within a certain range.

Meanwhile, the direction key 46 is operated by an external signal transmitted from a remote control room located on the land, so that the steering direction of the propulsion frame can be steered by the angular displacement, As shown in FIG.

The steering unit 50 includes a chamber 51 fixed to the propelling frame 42 and having an airtight structure so that seawater is hardly penetrated into the chamber 50 and a rotary shaft 46 disposed in the inner space of the chamber, And a steering motor member (52) directly or indirectly connected to the drive shaft (46a).

Here, the steering motor member 52 may be a stepping motor or a servo motor capable of precisely controlling the rotation angle, and may be operated by receiving external power from the battery provided in the chamber 51, And can be operated by receiving electricity generated from the battery.

Accordingly, when the direction of rotation of the direction key 46 connected to the driving shaft of the steering motor member 52 is rotated by the external signal so that the direction key 46 is disposed in parallel with the linear propelling frame 42, The propulsion frame 42 is moved in the linear direction D below the sea level by the propulsion force generated from the propeller vanes 45, so that the float 10 can be moved.

On the other hand, when the directional key 46 is changed to a state inclined at a predetermined angle with respect to the propelling frame 42 having a straight structure, the propelling frame 42 is moved under the sea level So that the propelling frame 42 can be pivotally moved in the curved direction D1.

Accordingly, it is possible to mount the observation system in accordance with the angle state of the direction key 46 and to move the float 10 connected thereto via the mooring member in the straight direction to a predetermined position or to observe precisely within a limited range So that the float 10 can be circulated.

Here, the propelling vane 45, which is rotatably assembled to the propelling frame through one end of the hinge member, rotates in the vertical direction between the upper and lower frames due to the swinging energy of the waves, And the driving force in the straight forward direction is switched in the curved direction by the direction key.

8A and 8B, when the force FW1, FW1 is received by the pushing vane 45 by the seawater applying pressure in the upward direction or the downward direction, the upper surface of the pushing vane 45 contacting the seawater The vertical force NF acting in the vertical direction is generated on the upper surface or the lower surface which is the contact surface with reference to the pressure center point C4 formed on the lower surface.

 The vertical force NF is diverted into the thrusts F2 and F4 in the direction toward the longitudinal direction of the propelling frame and the tension F1 and F3 in the upward or downward direction of the propeller.

The thrust force F2, F4 generated in the same direction at all times irrespective of the swinging operation in the up-and-down direction of the propeller vane can be used to obtain propulsive force for advancing the propelling frame 42 in one direction.

Accordingly, the propelling frame 42 is rotated by the thrust F2 and F4 due to the vertical drag force acting on the propeller vane 45 repeatedly rotating in the vertical direction due to the fluctuation energy of the wave, (D), which is a direction parallel to the direction of the flow, and this movement enables the movement of the float connected via the mooring member.

In addition, a directional key 46 inclined at one end of the propelling frame converts the linear direction into a curved direction so that the float 10 is circulated in a certain range of the sea level, And it is possible to precisely perform the weather observation at a limited position.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: wave power generator 10: float
11: base plate 12: floating structure
13: storage battery 15: opening
20: motion switching section 21: first connection axis
22: second connection shaft 23: first resistance plate
23a: first support shaft 24: second resistance plate
25: coupler 26: centering shaft
27: thicket 29: weight weight
30: power generator 31: first generator
32: second generator 40: position controller
41: mooring member 42: propelling frame
43: fixed base 44: hinge member
45: Propelling blade 46: Directional key
50: steering part 51: chamber
52: Steering motor member

Claims (11)

Floating fluids on the sea;
And a second connecting shaft having at least one central holding axis extending a predetermined length in a direction perpendicular to the water surface from a coupler disposed in the opening of the float and arranged to be orthogonal to the first connecting shaft of the coupler, A motion switching unit for converting a swing motion of the fluid into a rotational motion; And
A power generator having a first generator connected to the first connecting shaft and a second generator connected to the second connecting shaft to generate electricity by the rotational force of the first connecting shaft and the second connecting shaft; Lt; / RTI >
And a position control unit positioned below the sea surface to generate a propulsive force by the oscillating energy of the wave and connected to the motion converting unit through a mooring member having a predetermined length,
Wherein the position control unit controls the position of the float suspended on the water by the thrust force to be limited within a predetermined range. The method according to claim 1,
Wherein the central holding shaft comprises at least one weight at the lower end. The method according to claim 1,
Wherein the coupler includes a pair of right and left support portions forming a first shaft hole in which the first connection shaft is assembled and a second shaft hole in which an end of the second connection shaft is assembled, And a wave generator for generating the wave power. 4. The method according to any one of claims 1 to 3,
Wherein the drive shafts extending from the stator of the first and second generators are integrally provided with the first and second connection shafts or are detachably coupled to the ends of the first and second connection shafts. 4. The method according to any one of claims 1 to 3,
And a second resistance plate having one end fixed to one end thereof so as to be disposed in parallel with the first connection axis, and a second resistance plate having one end fixed to be disposed in parallel with the second connection axis, Wave power generation device characterized by. 6. The method of claim 5,
Wherein the first resistive plate or the second resistive plate is fixed to one end of the plate holding table provided at the middle of the length of the center holding axis. delete The method according to claim 1,
The position control unit
A propelling frame connected to the motion switching unit via the mooring member;
A propelling vane pivotally installed about a rotational axis perpendicular to a straight direction of the propelling frame;
And a direction key provided at an angle to the propelling frame at a predetermined angle so as to switch the traveling direction of the propelling frame in a curved direction. 9. The method of claim 8,
The propelling frame
And a connection frame connecting the upper and lower frames so as to maintain a gap between the upper and lower frames arranged side by side. 10. The method of claim 9,
Wherein a plurality of the propulsion blades are spaced apart from each other in the longitudinal direction of the frame. 11. The method according to any one of claims 8 to 10,
The position control unit
And a steering unit for converting the advancing direction of the propelling frame into a rectilinear direction and a curved direction,
The steering unit
A chamber provided in the propelling frame;
And a steering motor member disposed in an inner space of the chamber for rotationally displacing a rotation axis of a direction key rotatably assembled to the propelling frame.

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