CN212272432U - Oscillating hydrofoil tidal current energy power generation device - Google Patents

Abstract

The utility model discloses an oscillating hydrofoil tidal current energy power generation device, which relates to the field of ocean energy development and utilization and comprises a floating energy-absorbing power generation assembly and a cable assembly; the floating energy-absorbing power generation assembly comprises an energy-absorbing device for converting tidal current energy into mechanical energy, wherein the energy-absorbing device comprises an oscillating hydrofoil at least partially immersed in water and a rocker arm, one end of the rocker arm is connected with the oscillating hydrofoil, and the other end of the rocker arm is connected with a power generator; and the generator converting the mechanical energy into electrical energy; the cable assembly is configured to moor the energy absorber and generator to the seafloor. The power generation device of the utility model can effectively reduce the structure fixed load and increase the system stability; the structure is simple, the reliability is high, the maintenance is convenient, and the maintenance cost is reduced; is environment-friendly.

Description

Oscillating hydrofoil tidal current energy power generation device

Technical Field

The utility model relates to an ocean energy development utilizes the field, concretely relates to vibration hydrofoil trend can power generation facility.

Background

With the development of the world economy, the energy consumption demand is continuously rising. The traditional fossil energy is limited in quantity and has the problem of environmental pollution, and the development of renewable energy has become a global consensus to solve the problem of resource shortage. Huge energy is stored in the ocean, including wave energy, tidal current energy, temperature difference energy and the like. Tidal current energy is one kind of ocean renewable energy, and huge kinetic energy stored in ocean tidal current energy can be converted into electric energy for utilization through an energy conversion device. Compared with other forms of renewable energy sources, the tidal current energy source has high energy density, good load stability, strong predictability, small influence of meteorological conditions, capability of ensuring continuous and stable current output and obvious advantages in the aspect of grid-connected power generation.

The tidal current energy power generation device can be divided into a horizontal shaft type, a vertical shaft type and a swinging hydrofoil type according to the power generation principle. At present, the horizontal axis is the most, the vertical axis is the second, and the swing wing has several fingers. The horizontal axis type and the vertical axis type have high energy conversion efficiency, but have high requirements on blade design and great difficulty. Although the swing hydrofoil type tidal current energy power generation device has low energy conversion efficiency, compared with the former two devices, the swing hydrofoil type tidal current energy power generation device has the following advantages: no rotating machinery is used, so that the aquatic organisms are prevented from being damaged; the noise is small, and the ecological environment is friendly; the structure is simple, and the reliability is high; the construction cost is low, and the method is suitable for large-scale parallel deployment; low starting water head, natural adaptation to low-speed water flow and the like. Therefore, the swing hydrofoil has unique application potential. However, the existing swing hydrofoil power generation devices are basically fixed, namely fixed on the seabed through the self gravity of the device or through a support structure in the form of a jacket or the like, and the whole is immersed in the water, so that the installation and maintenance costs are high, the installation and maintenance costs are not movable although the influence of the sea surface condition is avoided, and the maintenance cost is high once a fault occurs. And because the device is close to the seabed, the tidal current flow rate is low, and the performance of the swing hydrofoil type power generation device is limited.

Therefore, those skilled in the art are dedicated to develop an oscillating hydrofoil tidal current energy power generation device, which can effectively reduce the structure fixed load and increase the system stability; the structure is simple, the reliability is high, the maintenance is convenient, and the maintenance cost is reduced; is environment-friendly.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a method for effectively reducing the structure fixing load and increasing the system stability; the structure is simple, the reliability is high, the maintenance is convenient, and the maintenance cost is reduced; an environment-friendly tidal current energy power generation device.

In order to achieve the purpose, the utility model provides an oscillating hydrofoil tidal current energy generating set, which is characterized by comprising an energy absorption device for converting tidal current energy into mechanical energy and a generator for converting the mechanical energy into electric energy; the energy absorption device comprises a rocker arm, the first end of the rocker arm is hinged with the oscillating hydrofoil, and the second end of the rocker arm is connected with the generator.

Further, the rocker arm is arranged to be exposed to the water surface.

Further, the oscillating hydrofoil is configured to provide buoyancy to the floating energy-absorbing power generation assembly.

Further, a buoyancy tank is included, the generator being disposed within the buoyancy tank, the buoyancy tank being configured to provide buoyancy to the floating energy-absorbing power generation assembly.

Further, the energy absorbing device is provided in 2.

Further, the energy absorption device comprises a first rocker arm, a first oscillating hydrofoil connected with the first end of the first rocker arm, a second rocker arm and a second oscillating hydrofoil connected with the first end of the second rocker arm;

the second end of the first rocker arm and the second end of the second rocker arm are respectively connected to the generator;

the first rocker arm and the second rocker arm are arranged to swing in a staggered manner without interfering with each other.

Further, the first end of the first rocker arm and the first end of the second rocker arm both pass through a first axis, the first end of the first rocker arm extends to the second end thereof for a length greater than the first end of the second rocker arm extends to the second end thereof, and the first rocker arm is arranged to be located above the second rocker arm.

Further, the first rocker arm and the second rocker arm are each arranged to be rotatable 360 ° about the first axis.

Further, a first end of the first rocker arm is hinged with the first oscillating foil.

Further, the first end of the second rocker arm is hinged to the second oscillating foil.

Further, the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil are respectively set to perform angle switching according to the included angle of the first rocker arm and the second rocker arm.

Further, the system comprises an angle control system, wherein the angle control system is set to respectively control the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil according to a set value of an included angle between the first rocker arm and the second rocker arm.

Further, the angle control system comprises an angle measuring instrument for measuring an included angle between the first rocker arm and the second rocker arm, a first driving device for providing power for switching of the angle of attack of the first oscillating hydrofoil, a second driving device for providing power for switching of the angle of attack of the second oscillating hydrofoil, and an angle controller, wherein the angle controller is electrically connected with the angle measuring instrument, the first driving device and the second driving device.

Further, the angle measuring instrument is disposed between a lower surface of the first rocker arm and an upper surface of the second rocker arm.

Further, the first driving device includes a first motor.

Further, the second driving means includes a second motor.

Further, the set value of the included angle between the first rocker arm and the second rocker arm is 80 degrees.

Further, the angle ranges of the attack angle of the first oscillating hydrofoil and the attack angle of the second oscillating hydrofoil are both-45 degrees to-45 degrees.

Further, the first and second rocker arms are arranged to rotate in opposite directions about the first axis.

Further, the first and second oscillating hydrofoils are configured to cause the first and second rocker arms to rotate about the first axis in opposite directions under the influence of water flow.

The beneficial technical effects are as follows:

1) the power generation device of a preferred embodiment of the utility model adopts the floating energy-absorbing power generation assembly, so that the power generation work can be carried out on the offshore surface, and higher tidal current energy can be captured; the cost of the movement and the daily maintenance of the device is reduced when the sea surface works; meanwhile, the working load of the fixed component is reduced due to the sea surface work, and the stability and the reliability of the power generation device are facilitated.

2) The utility model discloses a power generation facility, in the embodiment that the energy-absorbing device is 2, two energy-absorbing devices staggered arrangement, it is mutual noninterference when the swing electricity generation.

3) The 2 energy absorption devices can independently generate power, and when one energy absorption device stops working, the other energy absorption device can continue to swing to generate power.

4) In the embodiment that the energy absorption devices are 2, preferably, the angle control system respectively controls the attack angles of the first hydrofoil and the second hydrofoil according to the set values of the included angles of the first rocker arm and the second rocker arm so as to ensure the back-and-forth swing of the first rocker arm and the second rocker arm; meanwhile, the control of the attack angle can ensure higher power generation efficiency.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic structural diagram of an oscillating hydrofoil tidal current energy power generation device according to a preferred embodiment of the present invention;

FIG. 2 is a schematic top view of the embodiment of FIG. 1;

FIG. 3 is a perspective view of an oscillating hydrofoil;

FIG. 4 is a cross-sectional view of the oscillating hydrofoil shown in FIG. 3;

FIG. 5 is a schematic diagram of a first state of the workflow of the embodiment shown in FIG. 1;

FIG. 6 is a schematic diagram of a second state of the workflow of the embodiment of FIG. 1;

FIG. 7 is a schematic diagram of a third state of the workflow of the embodiment of FIG. 1;

FIG. 8 is a fourth state diagram illustrating the operation of the embodiment of FIG. 1;

FIG. 9 is a fifth state diagram illustrating the operation of the embodiment of FIG. 1;

FIG. 10 is a sixth state diagram illustrating the operation of the embodiment of FIG. 1;

fig. 11 is a schematic structural diagram of the oscillating hydrofoil tidal current energy power generation device in which the flow direction of the tidal current changes by 180 degrees according to a preferred embodiment of the present invention;

the system comprises 1-a second oscillating hydrofoil, 2-a first oscillating hydrofoil, 3-a second oscillating hydrofoil shaft, 4-a first oscillating hydrofoil shaft, 5-a first motor, 6-a second motor, 7-a first rocker arm, 8-a second rocker arm, 9-a second driven wheel, 10-a rotor of a generator, 11-a stator of the generator, 12-a first driven wheel, 13-a fixed shaft, 14-a strong supporting member, 15-a first driving wheel, 16-a second driving wheel, 17-a second main shaft, 18-a first main shaft, 19-a buoyancy tank, 20-an anchor chain, 21-an angle controller and 22-an angle measuring instrument.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

The utility model discloses an oscillating hydrofoil trend can power generation facility, the basic operating principle is that the oscillating hydrofoil drives the rocking arm swing under the effect of trend, and the swing of rocking arm leads to transmission drive generator work to produce the electric energy.

The oscillating hydrofoil tidal current energy power generation device in a preferred embodiment of the utility model comprises a floating energy-absorbing power generation component and a cable component; the floating energy-absorbing power generation assembly comprises an energy-absorbing device for converting tidal current energy into mechanical energy, wherein the energy-absorbing device comprises an oscillating hydrofoil at least partially immersed in water and a rocker arm, one end of the rocker arm is connected with the oscillating hydrofoil, and the other end of the rocker arm is connected with a power generator; and the generator converting the mechanical energy into electrical energy; the cable assembly is configured to moor the energy absorber and generator to the seafloor. The cable assembly moors the energy absorption device and the generator to the seabed through anchoring, mooring or other modes, so that the energy absorption device and the generator are fixedly connected to a certain position on the seabed. The floating energy-absorbing power generation assembly works on the sea surface and can be dragged to any water area capable of working, and the installation and later maintenance work of all electromechanical equipment can be finished on the water surface, so that the moving and daily maintenance costs of the floating energy-absorbing power generation assembly are reduced; the sea surface has high-flow-rate tide, and the operation on the sea surface is favorable for capturing higher tide energy and improving the power generation efficiency; meanwhile, the working load of the fixed component is reduced due to the sea surface work, and the stability and the reliability of the floating type energy-absorbing power generation assembly are facilitated.

In the preferred embodiment of the present invention, it is preferable that the rocker arm is disposed to be exposed to the water, so that when the power generation device is operated, the rocker arm is prevented from moving in the water and being subjected to resistance of the water, thereby reducing the power generation efficiency.

In a preferred embodiment of the invention, the oscillating foil is preferably arranged to provide buoyancy.

In a preferred embodiment of the present invention, preferably, a buoyancy tank is further provided, the buoyancy tank being configured to provide buoyancy.

In the preferred embodiment of the present invention, the buoyancy tank and the hydrofoil provide buoyancy simultaneously; at least 2 buoyancy points are provided, so that the whole power generation device floats more evenly; meanwhile, the buoyancy tank and the hydrofoils provide buoyancy force to enable the rocker arms to be close to a parallel horizontal plane, the rocker arms rotate more smoothly, one end of each fixed rocker arm is prevented from being affected by bending moment in the vertical direction, and the service life of the rocker arms is prolonged.

The energy absorbing device may be provided in 1 or more. As shown in fig. 1 and 2, in another preferred embodiment of the present invention, the oscillating hydrofoil tidal current energy power generation device works in the offshore area, and includes 2 energy absorbers, and the 2 energy absorbers can independently convert tidal current energy into mechanical energy without interfering with each other, i.e., when one energy absorber stops working, the other energy absorber can work normally. When the 2 energy absorption devices simultaneously and symmetrically swing to generate power, the transverse force of the power generation device can be counteracted. The energy absorption device comprises a first rocker arm 7, a first oscillating hydrofoil 2 connected with a first end of the first rocker arm 7, a second rocker arm 8 and a second oscillating hydrofoil 1 connected with a first end of the second rocker arm 8; the second end of the first rocker arm 7 and the second end of the second rocker arm 8 are respectively connected to a generator, and the first rocker arm 7 and the second rocker arm 8 are arranged to swing in a staggered manner without interfering with each other. The power plant further comprises buoyancy tanks 19 providing buoyancy, the tanks 19 being connected to one end of the chain 20, the other end of the chain 20 being anchored to the sea floor.

The first rocker arm 7 and the second rocker arm 8 are arranged to work out of the water; both the first 2 and the second 1 oscillating hydrofoils are at least partially submerged in the water and provide buoyancy to the power plant.

In the preferred embodiment, the first end of the first rocker arm 7 and the first end of the second rocker arm 8 both pass through the first axis C, the first end of the first rocker arm 7 extends to the second end thereof over a length greater than the length of the second rocker arm 8 from the first end thereof, and the first rocker arm 7 is arranged to be located above said second rocker arm 8. By means of the arrangement, the first rocker arm 7 and the second rocker arm 8 can swing in a staggered mode without interfering with each other.

In the preferred embodiment, the first rocker arm 7 and the second rocker arm 8 are each arranged to rotate 360 ° about the first axis C to automatically adapt to the ambient flow direction.

In the present preferred embodiment, the first end of the first rocker arm 7 is hinged to the first oscillating foil 2, preferably by means of a first oscillating foil shaft 4; the first end of the second rocker arm 8 is hinged to the second oscillating hydrofoil 1, preferably by means of a second oscillating hydrofoil shaft 3; the angle of attack of the first oscillating hydrofoil 2 and the angle of attack of the second oscillating hydrofoil 1 are set to be angularly switched according to the angle of inclusion of the first rocker arm 7 and the second rocker arm 8, respectively. As shown in fig. 2, a1 is a section symmetry line of the second oscillating hydrofoil, a2 is a section symmetry line of the first oscillating hydrofoil, and the angle of attack of the oscillating hydrofoil in the present invention refers to an included angle between the section symmetry line (e.g., a1, a2) of the oscillating hydrofoil and the tidal current direction D, and is positive above the tidal current direction D and negative below the tidal current direction D; as shown in fig. 2, the angle of attack b of the second oscillating hydrofoil is negative, and the angle of attack b of the first oscillating hydrofoil is positive; the angle between the first rocker arm 7 and the second rocker arm 8 is here referred to as the angle a between the first rocker arm 7 and the second rocker arm 8 in the direction D of the flow of the tide.

In the preferred embodiment, an angle control system is also included, which is arranged to control the angle values of the angle of attack of the first oscillating hydrofoil 2 and the angle of attack of the second oscillating hydrofoil 1, respectively, in dependence on the angle setting between the first rocker arm 7 and the second rocker arm 8. The angle control system comprises an angle measuring instrument 22 for measuring the angle between the first rocker arm 7 and the second rocker arm 8, the angle measuring instrument 22 being arranged between the lower surface of the first rocker arm 7 and the upper surface of the second rocker arm 8. The angle control system further comprises a first driving means, i.e. a first electric machine 5, for powering the angle of attack switching of the first oscillating hydrofoil 2; a second driving device, i.e. a second electric machine 6, for powering the angle of attack switching of the second oscillating hydrofoil 1; an angle controller 21. The angle controller 21 is electrically connected to the angle measuring instrument 22, the first motor 5, and the second motor 6. In the preferred embodiment of the present invention, the angle between the first rocker arm 7 and the second rocker arm 8 is set to 80 °. The angle ranges of the attack angle of the first oscillating hydrofoil 2 and the attack angle of the second oscillating hydrofoil 1 are both-45 degrees to 45 degrees.

In the preferred embodiment of the present invention, a transmission gear device is further provided, and the 2 energy absorbing devices respectively transmit the mechanical energy of the first rocker arm 7 and the second rocker arm 8 to the generator through the transmission gear device, and the generator converts the mechanical energy into electric energy.

In a preferred embodiment of the present invention, the transmission gear device includes a first transmission gear and a second transmission gear which work independently of each other. The transmission gear devices work independently, so that when one of the transmission gear devices stops working, the other transmission gear device can work continuously, the two transmission gear devices work without interference, and the stability of power generation can be ensured. The first transmission gear is used to transmit the mechanical energy of the first rocker arm 7 to the generator, and the second transmission gear is used to transmit the mechanical energy of the second rocker arm 8 to the generator. Wherein the generator comprises a stator 11 and a rotor 10.

The first transmission gear comprises a first driving wheel 15 and a first driven wheel 12 meshed with the first driving wheel 15; the first driving wheel 15 is connected with the second end of the first rocker arm 7, and is configured to drive the first driving wheel 15 to rotate when the first rocker arm 7 rotates around the first axis C, and the first driving wheel 15 is engaged with and drives the first driven wheel 12 to rotate; the rotation of the first driven wheel 12 drives the stator 11 of the generator connected with the first driven wheel to rotate relative to the rotor 10 of the generator to generate electricity.

The second transmission gear comprises a second driving wheel 16 and a second driven wheel 9 meshed with the second driving wheel; the second driving wheel 16 is connected with the second end of the second rocker arm 8, and is configured to drive the second driving wheel 16 to rotate when the second rocker arm 8 rotates around the first axis C, and the second driving wheel 16 is engaged with and drives the second driven wheel 9 to rotate; the rotation of the second driven wheel 9 drives the rotor 10 of the generator fixedly connected with the second driven wheel to rotate relative to the stator 11 of the generator to generate electricity.

As shown in fig. 1, the second end of the first swing arm 7, the second end of the second swing arm 8, the second drive pulley 16, and the first drive pulley 15 are arranged in this order from top to bottom and are connected in series by a first main shaft 18, and the first main shaft 18 is supported by a strong support 14 onto the inner surface of the bottom surface of a buoyancy tank 19. The second driven pulley 9, the rotor 10 of the generator, the stator 11 of the generator, and the first driven pulley 12 are arranged in sequence from top to bottom and connected in series by a fixed shaft 13, and supported by the tip of the fixed shaft on the inner surface of the bottom surface of the buoyancy tank 19.

The second end of the second rocker arm 8 is fixedly connected with a second driving wheel 16 through a second main shaft 17, and the axis of the second main shaft 17 and the rotation axis of the second driving wheel 16 are both coincided with the first axis C; the second main shaft 17 penetrates through the top of the buoyancy tank 19 from the top and extends into the buoyancy tank 19, and the second main shaft 17 is matched with the buoyancy tank through a first bearing when penetrating through the top of the buoyancy tank 19; a through hole is provided in the second main shaft 17, the axis of which coincides with the first axis C.

The second end of the first rocker arm 7 is fixedly connected with the first driving wheel 15 through a first main shaft 18, the axis of the first main shaft 18 and the rotation axis of the first driving wheel 15 are both coincident with the first axis C, and the first main shaft 18 extends from the second end of the first rocker arm 7 to the bottom of the buoyancy tank 19 through a through hole of the second main shaft 17; the first spindle 18 is fitted through the second bearing when passing through the through hole of the second spindle 17.

The second main shaft 17 is supported on the buoyancy tank 19 by a first bearing and a second bearing.

In the preferred embodiment of the present invention, the drive gear arrangement and the rotor and stator of the generator are both disposed within the buoyancy tank 19.

As shown in fig. 3 and 4, in the preferred embodiment of the present invention, the first oscillating hydrofoil 2 and the second oscillating hydrofoil 1 are both configured as wing-shaped.

In a further preferred embodiment of the invention, similar to the embodiment shown in fig. 1 and 2, the same reference numerals are used for the parts in fig. 1 and 2. This embodiment differs from the previous embodiments in that the present power plant can be operated both near the sea floor and near the sea surface. An oscillating hydrofoil tidal current energy power generation device comprises an energy absorption device and a generator, wherein the energy absorption device is used for converting tidal current energy into mechanical energy; the energy absorption device comprises a first rocker arm 7, a first oscillating hydrofoil 2 hinged with the first end of the first rocker arm 7, a second rocker arm 8 and a second oscillating hydrofoil 1 hinged with the first end of the second rocker arm 8; the second end of the first rocker arm 7 and the second end of the second rocker arm 8 are respectively connected to a generator; the first rocker arm 7 and the second rocker arm 8 are arranged to swing alternately without interfering with each other. The first oscillating hydrofoil 2 and the second oscillating hydrofoil 1 are respectively flexibly connected, so that the angle of attack of the first oscillating hydrofoil and the second oscillating hydrofoil can be conveniently changed.

In a further preferred embodiment, in order to achieve the mutual noninterference of the alternate swinging of the first rocker arm 7 and the second rocker arm 8, the following arrangement is preferably adopted. The first end of the first rocker arm 7 and the first end of the second rocker arm 8 both pass through a first axis C, the first end of the first rocker arm 7 extends to the second end thereof for a length greater than the length of the second rocker arm 8 from the first end thereof to the second end thereof, the first rocker arm 7 being arranged above said second rocker arm 8.

In a further preferred embodiment, the angle of attack of the first oscillating hydrofoil 2 and the angle of attack of the second oscillating hydrofoil 1 are arranged to be angularly switched according to the set values of the angles of the first rocker arm 7 and the second rocker arm 8, respectively.

In a further preferred embodiment, the power plant further comprises an angle control system arranged to control the angle values of the angle of attack of the first oscillating hydrofoil 2 and the angle of attack of the second oscillating hydrofoil 1, respectively, in dependence on a set value of the angle between the first rocker arm 7 and the second rocker arm 8. Further, the angle control system comprises an angle measuring instrument 22 for measuring an included angle between the first rocker arm 7 and the second rocker arm 8 along the tidal current direction, a first driving device for providing power for the attack angle switching of the first oscillating hydrofoil 7, a second driving device for providing power for the attack angle switching of the second oscillating hydrofoil 8 and an angle controller 21, wherein the angle controller 21 is electrically connected with the angle measuring instrument 22, the first driving device and the second driving device.

The utility model discloses a preferred embodiment, the power generation facility basic operating principle when energy-absorbing device is 2 does: the first oscillating hydrofoil and the second oscillating hydrofoil respectively drive the first rocker arm and the second rocker arm to swing under the action of tide, and the first rocker arm and the second rocker arm respectively drive the first driving wheel and the second driving wheel in the buoyancy tank to rotate so as to respectively drive the first driven wheel and the second driven wheel which are fixed on the generator to work, so that the generator generates electric energy; it should be noted that the power generation systems of the first rocker arm and the second rocker arm are independent and do not interfere with each other, that is, when one of the rocker arms fails, the power generation system can also work normally to drive the rotor or the stator of the power generation unit to rotate to generate power. Specifically, the flow diagrams of fig. 5, 6, 7, 8, 9, and 10 will be described in detail.

FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9 and FIG. 10 are the operational flow state diagrams of the power generation plant with 2 energy absorption plants; in these 6 figures, the first rocker arm 7 is a longer rocker arm (located below in fig. 5), connected to its right end is the first oscillating foil 2, while the shorter rocker arm 8 (located above in fig. 5) is the second oscillating foil 1 connected to its right end. As shown in fig. 5, in the activated position, the first rocker arm 7 (below fig. 5) and the second rocker arm 8 (above fig. 5) are in a position parallel to the direction of flow D, the angle of attack of the first oscillating hydrofoil 2 is adjusted to-45 °, and the angle of attack of the second oscillating hydrofoil 1 is adjusted to 45 °; under the action of tide, the first oscillating hydrofoil 2 is acted by force, so that the first rocker arm 7 rotates anticlockwise around the first axis C, the first main shaft 18 fixedly connected to the second end of the first rocker arm 7 rotates and drives the second driving wheel 15 to rotate, the first driving wheel 15 drives the first driven wheel 12 to rotate, the generator stator 11 fixedly connected with the first driven wheel 12 can rotate relative to the generator rotor 10, and the generator generates electricity; under the action of tidal current, the second oscillating hydrofoil 1 is acted by force, so that the second rocker arm 8 rotates clockwise around the first axis C, the second main shaft 17 fixedly connected to the second end of the second rocker arm 8 rotates and drives the second driving wheel 16 to rotate, the second driving wheel 16 drives the second driven wheel 9 to rotate, the generator rotor 10 fixedly connected with the second driven wheel 9 can rotate relative to the generator stator 11, and the generator generates electricity. When the first rocker arm 7 and the second rocker arm 8 swing to the included angle of 80 ° as shown in fig. 6, the angle controller 21 in the buoyancy tank 19 receives the signal of the angle measuring instrument 22, and outputs a signal to the first motor 5 and the second motor 6, so that the attack angle of the first hydrofoil 2 is adjusted to 45 ° and the attack angle of the second hydrofoil 1 is adjusted to-45 ° as shown in fig. 7, respectively, and thus the opposite movement is generated, wherein the first rocker arm 7 rotates clockwise around the first axis C and the second rocker arm 8 rotates counterclockwise around the first axis C as shown in fig. 8, 9 and 10; then, the tidal current energy is captured by the hydrofoil, converted into mechanical energy and then converted into electric energy to be stored according to the periodic movement in the sequence of fig. 5-fig. 6-fig. 7-fig. 8-fig. 9-fig. 10-fig. 5. During the periodic movement, the first rocker arm 7 and the second rocker arm 8 always move oppositely, so that the stator 11 and the rotor 10 of the generator always move oppositely, and when one rocker arm power generation system does not work, the other rocker arm power generation system can continue to generate power.

As shown in fig. 11, when the flow direction changes, the first rocker arm 7 and the second rocker arm 8 rotate to the positions parallel to the flow direction around the first axis C according to the flow direction, and the aforementioned motion power generation is repeated. Fig. 11 shows the relative position of the power plant after a 180 ° shift with respect to the flow direction D of the power flow of fig. 1. And the self-adaptive adjustment of different flow directions is realized.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (20)

1. An oscillating hydrofoil tidal current energy power generation device is characterized by comprising an energy absorption device and a generator, wherein the energy absorption device is used for converting tidal current energy into mechanical energy, and the generator is used for converting the mechanical energy into electric energy; the energy absorption device comprises a rocker arm, the first end of the rocker arm is hinged with the oscillating hydrofoil, and the second end of the rocker arm is connected with the generator.

2. An oscillating hydrofoil tidal current energy electrical energy generating apparatus according to claim 1 wherein the rocker arm is arranged to be exposed to the water.

3. An oscillating hydrofoil tidal current energy electrical energy generating device according to claim 1 wherein the oscillating hydrofoil is configured to provide buoyancy to the energy absorbing device.

4. An oscillating hydrofoil tidal current energy generation device according to claim 3 further comprising a buoyancy tank, the generator being disposed within the buoyancy tank, the buoyancy tank being configured to provide buoyancy to the energy absorption device.

5. An oscillating hydrofoil tidal current energy electrical generator as set forth in claim 1 wherein the energy absorbing device is provided in 2.

6. The oscillating hydrofoil tidal current energy electrical energy generating device of claim 5 wherein the energy absorbing device comprises a first rocker arm, a first oscillating hydrofoil connected to a first end of the first rocker arm, a second oscillating hydrofoil connected to a first end of the second rocker arm;

the second end of the first rocker arm and the second end of the second rocker arm are respectively connected to the generator;

the first rocker arm and the second rocker arm are arranged to swing in a staggered manner without interfering with each other.

7. The oscillating hydrofoil tidal current energy electrical energy generating device of claim 6 wherein the first end of the first rocker arm and the first end of the second rocker arm each pass through a first axis, the first end of the first rocker arm extending a greater length toward the second end thereof than the first end of the second rocker arm, the first rocker arm being disposed above the second rocker arm.

8. An oscillating hydrofoil tidal current energy electrical energy generating apparatus according to claim 7 wherein the first and second swing arms are each arranged for 360 ° rotation about the first axis.

9. An oscillating hydrofoil tidal current energy electrical energy generating device according to claim 6 wherein the first end of the first rocker arm is articulated to the first oscillating hydrofoil.

10. An oscillating hydrofoil tidal current energy electrical energy generating device according to claim 6 wherein the first end of the second rocker arm is articulated to the second oscillating hydrofoil.

11. The oscillating hydrofoil tidal current energy electrical energy generating device of claim 7 wherein the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil are each configured to be angularly switched depending on the angle of the first rocker arm and the second rocker arm.

12. The oscillating hydrofoil tidal current energy power generation device of claim 11 further comprising an angle control system configured to control the angle values of the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil, respectively, as a function of a set value of the angle between the first rocker arm and the second rocker arm.

13. The oscillating hydrofoil tidal current energy power generation device of claim 12, wherein the angle control system comprises an angle measuring instrument for measuring an included angle of the first rocker arm and the second rocker arm, a first driving device for powering the angle of attack switching of the first oscillating hydrofoil, a second driving device for powering the angle of attack switching of the second oscillating hydrofoil, and an angle controller electrically connected to the angle measuring instrument, the first driving device, and the second driving device.

14. The oscillating hydrofoil tidal current energy electrical generator of claim 13 wherein the angle measurement instrument is disposed between a lower surface of the first rocker arm and an upper surface of the second rocker arm.

15. An oscillating hydrofoil tidal current energy electrical energy generating apparatus according to claim 13 wherein the first drive means comprises a first electrical machine.

16. An oscillating hydrofoil tidal current energy electrical energy generating apparatus according to claim 13 wherein the second drive means comprises a second electrical machine.

17. An oscillating hydrofoil tidal current energy electrical generator as set forth in claim 13 wherein the angle between the first rocker arm and the second rocker arm is set at 80 °.

18. The oscillating hydrofoil tidal current energy electric power generating apparatus of claim 13 wherein the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil are both in the range of-45 ° to 45 °.

19. An oscillating hydrofoil tidal current energy electrical energy generating apparatus according to claim 13 wherein the first and second swing arms are arranged to rotate in opposite directions about the first axis.

20. The oscillating hydrofoil tidal current energy electrical energy generating device of claim 19 wherein the first oscillating hydrofoil and the second oscillating hydrofoil are configured to rotate in opposite directions about the first axis under the influence of a water current.

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