Floating type tidal current energy and wave energy combined power generation device

Abstract

The utility model provides a floating type tidal current energy and wave energy combined power generation device, which relates to the technical field of offshore power generation and comprises a floating body, a connecting arm fixed on the floating body, a water turbine fixed at the free end of the connecting arm and a wave energy conversion device fixed on the floating body, when the floating body floats on the water surface, the water turbine sinks into water to collect tidal current energy, and the wave energy conversion device floats on the water surface to collect wave energy; the structure is simple, wave energy and tidal current energy can be conveniently collected at the same time, implementation and maintenance are convenient, and the marine environment is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to offshore power generation technical field, specifically, relate to a kind of floating tidal current energy and wave energy combined power generation device. BACKGROUND

[0002] Ocean is a blue energy treasure house occupying about 71% of surface area, and the renewable energy in ocean has various spatial distribution forms, such as solar energy, wind energy, wave energy, tidal energy, tidal current energy, temperature difference energy, salinity difference energy and biomass energy. Compared with solar energy and wind energy, tidal current energy and wave energy are more concentrated, and their energy density is about 5-30 times higher than that of solar energy and about 5 times higher than that of wind energy, and they have strong predictability. According to statistics, the annual power generation of tidal current energy and wave energy in the world can reach trillion degree level. China has a wide continental shelf, and the marine environment of Bohai Sea, Yellow Sea and East China Sea islands has a complex flow system. According to statistics, there are more than 130 waterways in the country that have development prospects for tidal current energy and wave energy power generation. In particular, the flow velocity in Zhoushan area and Bohai Bay strait can reach 3.7 m / s. The energy flow density of tidal current energy is proportional to the third power of tidal current velocity and proportional to seawater density. Since the seawater density is about 800 times that of air, the tidal current energy flow density is much higher than that of wind energy. If tidal current energy can be successfully developed, it will have great significance for the overall energy supply of the country in the future.

[0003] The document with publication number CN106640512A discloses a wind energy and ocean energy comprehensive utilization power generation platform. The platform is fixed to the seabed by a fixed pile and collects tidal current energy and wave energy for power generation by a turbine on the fixed pile and a tidal current energy power generation device. This technical solution does not have universality because the fixed pile is very troublesome to construct in deep sea area and even cannot be implemented. Even in shallow sea area, the seabed topography needs to be considered. In addition, the density of tidal current energy is large near the water surface, and the depth of seawater often changes significantly due to the action of tides in some shallow sea areas. Although the turbine and the tidal current energy power generation device in this technical solution can slide up and down along the fixed pile to adapt to different sea levels, the complex seabed conditions, such as changes in seawater pressure, biological population activities, biological parasitism and even seabed volcanic activity, will greatly increase the probability of damage and maintenance cost. If it is completely damaged, the cost of removal will be very high, and if it is not removed, it will pollute the ocean to some extent. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a floating tidal current energy and wave energy combined power generation device, which has simple structure, is convenient for collecting wave energy and tidal current energy at the same time, is convenient for implementation and maintenance, and does not affect the marine environment.

[0005] The utility model provides a kind of tidal current energy and wave energy combined power generation device of floating type, including float, the connecting arm being fixed on float, the water turbine being fixed in the free end of connecting arm and the wave energy conversion device being fixed on float;When float floats on water surface, water turbine is submerged in water to collect tidal current energy, and wave energy conversion device floats on water surface to collect wave energy.

[0006] Compared with the prior art, the present application has the following advantages: due to the high flow rate near the water surface, the float can float on the sea surface, so that the water turbine can fully collect the tidal current energy near the water surface, without interfering with the collection of wave energy by the wave energy conversion device. The present application does not require construction on the seabed, and only needs to tow the float to the designated sea area by a tugboat. The main parts are floating on the sea surface, avoiding damage caused by complex conditions on the seabed, and easy to maintain. If completely damaged, it can be directly pulled away by a tugboat without affecting the marine environment.

[0007] In one possible implementation, the float includes two parallel and symmetrically arranged pontoons and a floating bridge fixed between the two pontoons, so that the float has an H-shaped structure.

[0008] Compared with the prior art, the above technical solution can make the float itself larger, which is beneficial to stable floating on the sea surface and not easily overturned by wind and waves, and is conducive to large-scale arrangement of wave energy conversion devices on the float.

[0009] In one possible implementation, the connecting arm and the water turbine group are both two; the two connecting arms are fixed on the outer walls on both sides of the float in the width direction, and the fixed ends of the two connecting arms are upward and the free ends are downward, so that the two connecting arms are both downwardly inclined; each water turbine group includes a connecting rod and a water turbine, the middle parts of the two connecting rods are fixed on the free ends of the two connecting arms respectively, and the two connecting rods are parallel to the pontoons, and the two water turbines are fixed on the end parts of the two connecting rods.

[0010] Compared with the prior art, the above technical solution can effectively submerge the two water turbines in water and locate them near the water surface when the float floats on the water surface, effectively collecting tidal current energy, and effectively stabilizing the float.

[0011] In one possible implementation, the wave energy conversion devices are multiple pairs and arranged along the length direction of the two pontoons; in each pair of wave energy conversion devices, two wave energy conversion devices are arranged on both sides of the pontoon in the width direction.

[0012] Compared with the prior art, the above technical solution can make full use of the area of the structure of the float, maximize the collection efficiency, reduce the incident wave, and make the float more stable.

[0013] In one possible implementation, each wave energy conversion device comprises a power generation device fixed on a floating pontoon, a hinged rod hinged on the power generation device, and a float fixed on a free end of the hinged rod; when the float moves up and down on the water surface, the hinged rod is driven to move around the hinge point, thereby driving the power generation device to generate power.

[0014] Compared with the prior art, the above technical solution can effectively collect wave energy, and when the float moves up and down, the power generation device is continuously driven to generate power.

[0015] In one possible implementation, the floating body is fixed to an external fixed point through a mooring device.

[0016] Compared with the prior art, the above technical solution can limit the floating body from drifting far away, and the external fixed point can be the seabed, i.e., the mooring device is fixed by anchoring into the seabed, and when it needs to be moved, the anchor can be lifted, which is very convenient.

[0017] In one possible implementation, the mooring device comprises four mooring cables; one end of each of the four mooring cables is fixed at four ends of the floating body, and the other end of each of the four mooring cables is fixed to the external fixed point.

[0018] Compared with the prior art, the above technical solution can effectively fix the floating body so that it does not drift far away

[0019] In one possible implementation, the mooring device further comprises a first traction cable in a Y-shaped structure and a second traction cable in a Y-shaped structure; two open ends of the first traction cable are fixed at two open ends on the right side of the floating body, and the other end of the first traction cable is fixed to the external fixed point; two open ends of the second traction cable are fixed at two open ends on the left side of the floating body, and the other end of the second traction cable is fixed to the external fixed point.

[0020] Compared with the prior art, the above technical solution is because the H-shaped structure of the floating body is torn due to the tidal energy or wave energy under the tension of the four mooring cables, which may cause the floating pontoon and the floating bridge to break and separate, so the first traction cable in a Y-shaped structure and the second traction cable in a Y-shaped structure are needed to limit and increase the rigidity between the floating pontoon and the floating bridge. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective view of the present application;

[0022] Figure 2 is a schematic view of a wave energy conversion device of the present application;

[0023] BRIEF DESCRIPTION OF DRAWINGS:

[0024] 1 - float, 2 - connecting arm, 3 - water turbine set, 4 - wave energy conversion device, 5 - mooring device, 11 - pontoon, 12 - floating bridge, 31 - connecting rod, 32 - water turbine, 41 - power generation device, 42 - hinged rod, 43 - float, 51 - mooring cable, 52 - first traction cable, 53 - second traction cable. DETAILED DESCRIPTION

[0025] Firstly, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the application examples, and are not intended to limit the protection scope of the application examples. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0026] In the description of the application examples, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application examples can be understood according to the specific circumstances.

[0027] In the application examples, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] The application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the float 1 is internally provided with a generator set matched with the water turbine set 3. When the tidal current drives the water turbine set 3 to operate, the generator set can generate electricity, and the float 1 can be selectively provided with a power storage system such as a battery or the like to store electrical energy, or can be selectively directly transmitted to the offshore power plant through the submarine cable.

[0029] The embodiment discloses a floating tidal current and wave energy combined power generation device, which comprises a float 1, a connecting arm 2 fixed on the float 1, a water turbine set 3 fixed on a free end of the connecting arm 2, and a wave energy conversion device 4 fixed on the float 1. When the float 1 floats on the water surface, the water turbine set 3 is submerged in the water to collect tidal current energy, and the wave energy conversion device 4 floats on the water surface to collect wave energy.

[0030] In the embodiment, the floating body 1 can be a structure of a single pontoon 11, and the connecting arm 2 can be fixed at the lower end of the floating body 1, so that the floating body 1 can float on the sea surface due to the high flow speed near the water surface, so that the water turbine set 3 can fully collect the tidal current energy near the water surface, and meanwhile, the collection of the wave energy conversion device 4 on the wave energy can not be interfered, and the application does not need to be constructed on the seabed, and generally only needs to be towed to the designated sea area by a tugboat, and the main parts are all floating on the sea surface, so as to avoid damage caused by the complex situation on the seabed, and the maintenance is convenient, and if it is completely damaged, it can be directly pulled away by the tugboat, without affecting the marine environment.

[0031] As shown in the accompanying drawings, Figure 1 In some embodiments, the floating body 1 includes two mutually parallel and symmetrically arranged pontoons 11 and a floating bridge 12 fixed between the two pontoons 11, so that the floating body 1 has an H-shaped structure. The floating bridge 12 can be integrally formed with the two pontoons 11 to increase the rigidity. The H-shaped floating body 1 has a larger area, which is beneficial to stable floating when placed on the sea surface, is not easy to be overturned by wind and waves, and is beneficial to large-scale arrangement of the wave energy conversion device 4 on the floating body 1.

[0032] As shown in the accompanying drawings, Figure 1 In some embodiments, the connecting arm 2 and the water turbine set 3 are both two; the two connecting arms 2 are respectively fixed on the outer walls on both sides of the floating body 1 in the width direction, and the fixed ends of the two connecting arms 2 are upward and the free ends are downward, so that the two connecting arms 2 are both downwardly inclined; each water turbine set 3 includes a connecting rod 31 and a water turbine 32, the middle parts of the two connecting rods 31 are respectively fixed at the free ends of the two connecting arms 2, and the two connecting rods 31 are both parallel to the pontoon 11, and the two water turbines 32 are respectively fixed at the end portions of the two connecting rods 31. The two connecting arms 2 are respectively fixed on the outer walls on both sides of the floating body 1 in the width direction and are located at both ends of the floating bridge 11 in the length direction, and are downwardly inclined by 45°, so that when the floating body 1 floats on the water surface, the two water turbine sets 3 can effectively submerge in the water and be located near the water surface, effectively collect the tidal current energy, and be beneficial to the stability of the floating body 1.

[0033] As shown in the accompanying drawings, Figure 1 In some embodiments, the wave energy conversion device 4 is multiple pairs and is arranged along the length direction of the two pontoons 11; in each pair of wave energy conversion devices 4, two wave energy conversion devices 4 are arranged on both sides of the pontoon 11 in the width direction. The wave energy conversion devices 4 are uniformly distributed along the length direction of the two pontoons 11 and are located on the left and right sides of the two connecting arms 2. The area of the structure of the floating body 1 is fully utilized, so that the collection efficiency is maximized, the incident wave can be reduced, and the floating body 1 can be more stably floated.

[0034] As shown in the accompanying drawings, Figure 2As shown, in some embodiments, each wave energy conversion device 4 comprises a power generation device 41 fixed on the buoy 11, a hinged rod 42 hinged on the power generation device 41, and a float 43 fixed on the free end of the hinged rod 42; when the float 43 moves up and down on the water surface, it drives the hinged rod 42 to move around the hinge point, thereby driving the power generation device 41 to generate power. The power generation device 41 can be a hydraulic energy storage WEC power generation system, such as the attached Figure 2 As shown, when the float 43 moves up and down, it drives the hinged rod 42 to move up and down around the hinge point, thereby driving the rotor structure inside the power generation device 41 to continuously work and generate power; in this embodiment, a damping can be provided at the hinge point of the power generation device 41, and the up and down movement amplitude of the hinged rod 42 is controlled by adjusting the damping parameter, so that the floating body 1 is in a relatively stable floating state.

[0035] As shown in the attached Figure 1 As shown, in some embodiments, the floating body 1 is fixed to the external fixed point by the mooring device 5. In this embodiment, the mooring device 5 can be a single mooring cable 51, which can limit the floating body from drifting far away, and the external fixed point can be a fixed point on the sea bottom, a fixed point on the shore, and a towing ship, etc. If in deep sea area, an anchor can be fixed on the free end of the mooring cable 51, and then anchored into the sea bottom to form a fixed point, and the anchor can be lifted when moving. If in near sea area, the mooring cable 51 can also be anchored into the sea bottom, or the free end of the mooring cable 51 can be directly fixed on the shore, and the mooring cable 51 is also convenient for towing ship to pull.

[0036] As shown in the attached Figure 1 As shown, in some embodiments, the mooring device 5 comprises four mooring cables 51; one end of each of the four mooring cables 51 is fixed at the four ends of the floating body 1, and the other end of each of the four mooring cables 51 is fixed to the external fixed point. The four mooring cables 51 can effectively fix the floating body 1, so that the floating body 1 will not drift far away, and the external fixed point is the same as above.

[0037] As shown in the attached Figure 1As shown, in some embodiments, the mooring device 5 further comprises a first traction cable 52 in Y-shaped structure and a second traction cable 53 in Y-shaped structure; two open ends of the first traction cable 52 are fixed at two open ends on the right side of the floating body 1 respectively, and the other end of the first traction cable 52 is fixed with an external fixed point; two open ends of the second traction cable 53 are fixed at two open ends on the left side of the floating body 1 respectively, and the other end of the second traction cable 53 is fixed with an external fixed point. Since the floating body 1 in H-shaped structure is subjected to tearing due to tidal energy or wave energy under the tension of the four mooring cables 51, the open ends on the left and right sides of the floating body 1 may be broken and separated, that is, the two pontoons 11 and the floating bridge 12 are broken and separated, so the first traction cable 52 in Y-shaped structure and the second traction cable 53 in Y-shaped structure are needed to pull the open ends on the left and right sides of the floating body 1, increase the rigidity between the pontoon 11 and the floating bridge 12, and the external fixed points are the same as above.

[0038] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms indicating the direction or position relationship are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, different embodiments or examples described in the specification and the characteristics of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0040] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical scope disclosed in the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A floating combined tidal and wave energy device, characterised in that, The utility model provides a wave energy conversion device, including float (1), the connecting arm (2) of fixed in float (1), the water turbine unit (3) of fixed in the free end of connecting arm (2) and the wave energy conversion device (4) of fixed in float (1), when float (1) floats on the water surface, water turbine unit (3) is submerged in water and collects tidal current energy, and wave energy conversion device (4) floats on the water surface and collects wave energy, The float (1) is fixed with an external fixed point by a mooring device (5); The mooring device (5) includes four mooring cables (51); one end of the four mooring cables (51) is fixed at the four ends of the float (1), and the other end of the four mooring cables (51) is fixed with an external fixed point; The mooring device (5) further includes a first traction cable (52) in a Y-shaped structure and a second traction cable (53) in a Y-shaped structure; the two open ends of the first traction cable (52) are fixed with the two open ends on the right side of the float (1), and the other end of the first traction cable (52) is fixed with an external fixed point; the two open ends of the second traction cable (53) are fixed with the two open ends on the left side of the float (1), and the other end of the second traction cable (53) is fixed with an external fixed point.

2. The floating tidal and wave energy converter of claim 1, wherein, The float (1) includes two parallel and symmetrically arranged pontoons (11) and a floating bridge (12) fixed between the two pontoons (11), so that the float (1) has a H-shaped structure.

3. The floating tidal and wave energy converter of claim 2, wherein, The connecting arm (2) and the water turbine unit (3) are both two; the two connecting arms (2) are fixed on the outer walls on both sides of the float (1) in the width direction, and the fixed ends of the two connecting arms (2) are upward and the free ends are downward, so that the two connecting arms (2) are both downwardly inclined; each water turbine unit (3) includes a connecting rod (31) and a water turbine (32), the middle parts of the two connecting rods (31) are fixed on the free ends of the two connecting arms (2), and the two connecting rods (31) are parallel to the pontoons (11), and the two water turbines (32) are fixed on the end portions of the two connecting rods (31).

4. A floating tidal and wave energy converter according to claim 2 or 3, characterised in that, The wave energy conversion device (4) is multiple pairs and arranged along the length direction of the two pontoons (11); in each pair of wave energy conversion devices (4), the two wave energy conversion devices (4) are arranged on both sides of the pontoon (11) in the width direction.

5. The floating tidal and wave energy converter of claim 4, wherein, Each wave energy conversion device (4) includes a power generation device (41) fixed on the pontoon (11), a hinge rod (42) hinged on the power generation device (41), and a float (43) fixed on the free end of the hinge rod (42); when the float (43) moves up and down on the water surface, it drives the hinge rod (42) to move around the hinge point, thereby doing work on the power generation device (41) to generate electricity.

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