CN111577520A - An oscillating hydrofoil tidal current energy generating device - Google Patents

Abstract

The invention 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 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

An oscillating hydrofoil tidal current energy generating device

technical field

The invention relates to the field of marine energy development and utilization, in particular to an oscillating hydrofoil tidal current energy generating device.

Background technique

With the development of the world economy, the demand for energy consumption continues to rise. The amount of traditional fossil energy is limited and there are environmental pollution problems. In order to solve the problem of resource shortage, the development of renewable energy has become a global consensus. There is a huge amount of energy in the ocean, including wave energy, tidal energy, tidal energy, and temperature difference energy. As a kind of marine renewable energy, tidal energy can be used by converting the huge kinetic energy contained in ocean tidal energy into electrical energy through energy conversion devices. Compared with other forms of renewable energy, tidal current energy resources have high energy density, good load stability, strong predictability and little influence by weather conditions, which can ensure continuous and stable current output, and have obvious advantages in grid-connected power generation.

According to the principle of power generation, tidal current energy generation devices can be divided into three types: horizontal axis type, vertical axis type and swing hydrofoil. At present, the horizontal axis type is the most, followed by the vertical axis type, and there are only a handful of swing wings. Although the horizontal axis type and vertical axis type have higher energy conversion efficiency, they have high requirements for blade design and are difficult. Although the energy conversion efficiency of the swing hydrofoil type tidal current energy generation device is low, compared with the former two, it has the following advantages: no rotating machinery, avoiding damage to aquatic organisms; low noise, friendly to the ecological environment; simple structure, High reliability; low construction cost, suitable for large-scale side-by-side deployment; low start-up head, natural adaptation to low-speed water flow, etc. Therefore, swinging hydrofoils have unique application potential. However, the current swing hydrofoil power generation devices are basically fixed, that is, they are fixed to the seabed by the device's own gravity or through a supporting structure in the form of a jacket, and the whole is immersed in the water, although it is not affected by the sea surface. However, the installation and maintenance costs are high, and they cannot be moved. Once a failure occurs, the maintenance cost is very high. And because it is close to the seabed, the tidal current is slow, which limits the performance of the swing hydrofoil power generation device.

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

SUMMARY OF THE INVENTION

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a method that can effectively reduce the fixed load of the structure and increase the stability of the system; the structure is simple, the reliability is high, the maintenance is convenient, and the maintenance cost is reduced; Tide energy generator.

In order to achieve the above object, the present invention provides an oscillating hydrofoil tidal current energy generating device, which is characterized in that it includes an energy absorbing device that converts tidal current energy into mechanical energy, and a generator that converts the mechanical energy into electrical energy; The energy device includes 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 out of the water.

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

Further, it also includes a buoyancy box, the generator is arranged in the buoyancy box, and the buoyancy box is arranged to provide buoyancy for the floating energy-absorbing power generation assembly.

Further, the number of the energy absorbing devices is set to two.

Further, the energy absorbing device includes a first rocker arm, a first oscillating hydrofoil connected to the first end of the first rocker arm, a second rocker arm, and a first end of the second rocker arm the second oscillating hydrofoil;

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 staggeredly without interfering with each other.

Further, both the first end of the first rocker arm and the first end of the second rocker arm pass through the first axis, and the length of the first end of the first rocker arm extending toward the second end is greater than all The length that the first end of the second rocker arm extends toward 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 respectively configured to be rotatable about the first axis by 360°.

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

Further, the first end of the second rocker arm is hinged with the second oscillating hydrofoil.

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

Further, the angle control system includes an angle measuring instrument for measuring the angle between the first rocker arm and the second rocker arm, a first rocker for providing power for switching the angle of attack of the first oscillating hydrofoil. A driving device, a second driving device for providing power for switching the angle of attack of the second oscillating hydrofoil, an angle controller, the angle controller and the angle measuring instrument, the first driving device, the second driving device The drive unit is electrically connected.

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

Further, the first driving device includes a first motor.

Further, the second driving device includes a second motor.

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

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

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

Further, the first oscillating hydrofoil and the second oscillating hydrofoil are arranged to rotate around the first axis in opposite directions under the action of the water flow.

Beneficial technical effects:

1) The power generation device of a preferred embodiment of the present invention adopts a floating energy-absorbing power generation assembly, so that the power generation work works on the offshore surface and can capture higher tidal energy; the sea surface work reduces the cost of the movement of the device and the daily maintenance; At the same time, the work on the sea surface reduces the working load of the fixed components, which is beneficial to the stability and reliability of the power generation device.

2) In the power generation device of the present invention, in the embodiment in which there are two energy absorption devices, the two energy absorption devices are arranged in a staggered manner, and they do not interfere with each other during swing power generation.

3) The two energy-absorbing devices can generate electricity independently. When one of the energy-absorbing devices stops working, the other can continue to swing and generate electricity.

4) In the embodiment with two energy absorbing devices, in a preferred situation, the angle control system controls the first hydrofoil and the second hydrofoil respectively according to the set value of the included angle of the first rocker arm and the second rocker arm. The angle of attack of the wing can ensure the back and forth swing of the first rocker arm and the second rocker arm; at the same time, the control of the angle of attack can ensure higher power generation efficiency.

The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present invention.

Description of drawings

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

Fig. 2 is the top view structure schematic diagram of the embodiment of Fig. 1;

Figure 3 is a perspective view of an oscillating hydrofoil;

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

Fig. 5 is the first state schematic diagram of the work flow of the embodiment shown in Fig. 1;

Fig. 6 is the second state schematic diagram of the work flow of the embodiment shown in Fig. 1;

Fig. 7 is the third state schematic diagram of the work flow of the embodiment shown in Fig. 1;

Fig. 8 is the fourth state schematic diagram of the work flow of the embodiment shown in Fig. 1;

Fig. 9 is the fifth state schematic diagram of the work flow of the embodiment shown in Fig. 1;

Fig. 10 is the sixth state schematic diagram of the work flow of the embodiment shown in Fig. 1;

Figure 11 is a schematic structural diagram of the oscillating hydrofoil tidal current energy generating device of a preferred embodiment of the present invention after the flow direction of the tidal current is changed by 180°;

Among them, 1- the second oscillating hydrofoil, 2- the first oscillating hydrofoil, 3- the second oscillating hydrofoil shaft, 4- the first oscillating hydrofoil shaft, 5- the first motor, 6- the second motor, 7- First rocker arm, 8-second rocker arm, 9-second driven wheel, 10-generator rotor, 11-generator stator, 12-first driven wheel, 13-fixed shaft, 14-strong support , 15-first driving wheel, 16-second driving wheel, 17-second main shaft, 18-first main shaft, 19-floating box, 20-anchor chain, 21-angle controller, 22-angle measuring instrument.

Detailed ways

The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

In the drawings, structurally identical components are denoted by the same numerals, and structurally or functionally similar components are denoted by like numerals throughout. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thicknesses of components are appropriately exaggerated in some places in the drawings.

The basic working principle of the oscillating hydrofoil tidal current energy generating device of the present invention is that the oscillating hydrofoil drives the rocker arm to swing under the action of the tidal current, and the swing of the rocker arm drives the generator to work through the transmission device, thereby generating electric energy.

In a preferred embodiment of the present invention, the oscillating hydrofoil tidal current energy power generation device includes a floating energy-absorbing power generation assembly and a cable assembly; wherein the floating energy-absorbing power generation assembly includes an energy-absorbing device that converts tidal current energy into mechanical energy , the energy absorbing device comprises an oscillating hydrofoil at least partially immersed in water and a rocker arm connected with the oscillating hydrofoil at one end, and the other end of the rocker arm is connected with a generator; and a device that converts the mechanical energy into electrical energy the generator; the cable assembly configured to moor the energy absorbing device and the generator subsea. The cable assembly anchors the energy absorbing device and the generator to the seabed by mooring, mooring or other means, so that the energy absorbing device and the generator are fixedly connected to a certain position on the seabed. The floating energy-absorbing power generation module works on the sea surface and can be towed to any water area where it can be operated. The installation of all electromechanical equipment and post-maintenance work can be completed on the water surface, enabling the movement and daily maintenance of the floating energy-absorbing power generation module. The cost is reduced; the sea has high flow tidal currents, and the sea surface operation is conducive to capturing higher tidal energy and improving the power generation efficiency; at the same time, the sea surface operation reduces the working load of the fixed components, which is conducive to the stability of the floating energy-absorbing power generation components and reliability.

In a preferred embodiment of the present invention, preferably, the rocker arm is set to protrude from the water surface. When the power generating device is working, the rocker arm is prevented from moving in the water and the resistance of the water is prevented, thereby reducing the power generation efficiency.

In a preferred embodiment of the present invention, preferably the oscillating hydrofoils are arranged to provide buoyancy.

In a preferred embodiment of the present invention, preferably, a pontoon is also provided, and the pontoon is arranged to provide buoyancy.

In a preferred embodiment of the present invention, the buoyancy box and the hydrofoil provide buoyancy at the same time; there are at least two buoyancy points, so that the entire power generation device floats relatively balanced; at the same time, the buoyancy box and the hydrofoil provide buoyancy so that the rocker arm is close to the parallel horizontal plane, When the arm rotates more smoothly, the end of the fixed rocker arm is prevented from being affected by the bending moment in the vertical direction, and the service life of the rocker arm is improved.

The energy absorbing device can be set as one or more. As shown in Figures 1 and 2, in another preferred embodiment of the present invention, the oscillating hydrofoil tidal current energy generating device works in the offshore area, including two energy absorbing devices, and the two energy absorbing devices can be independent The tidal current energy is converted into mechanical energy without interfering with each other, that is, when one energy absorbing device stops working, the other energy absorbing device can work normally. When the two energy absorbing devices swing symmetrically to generate electricity at the same time, they can offset the lateral force of the generating device. The energy absorption device includes a first rocker arm 7 , a first oscillating hydrofoil 2 connected to the first end of the first rocker arm 7 , a second rocker arm 8 , and a first end of the second rocker arm 8 The second oscillating hydrofoil 1 of the Do not interfere. The power generation device also includes a buoyancy tank 19, the buoyancy tank 19 is connected with one end of the anchor chain 20, and the other end of the anchor chain 20 is anchored on the seabed.

The first rocker arm 7 and the second rocker arm 8 are set to work above the water surface; both the first oscillating hydrofoil 2 and the second oscillating hydrofoil 1 are at least partially submerged in water and provide buoyancy for the power generating device.

In this preferred embodiment, both the first end of the first rocker arm 7 and the first end of the second rocker arm 8 pass through the first axis C, and the first end of the first rocker arm 7 extends toward its second end. The length is greater than the length that the first end of the second rocker arm 8 extends toward the second end thereof, and the first rocker arm 7 is arranged to be located above the second rocker arm 8 . With such an arrangement, the first rocker arm 7 and the second rocker arm 8 can be staggered and swing without interfering with each other.

In this preferred embodiment, the first rocker arm 7 and the second rocker arm 8 are respectively set to be able to rotate 360° around the first axis C to automatically adapt to the flow direction of the environment.

In this preferred embodiment, the first end of the first rocker arm 7 is hinged with the first oscillating hydrofoil 2, preferably, connected through the first oscillating hydrofoil shaft 4; the first end of the second rocker arm 8 is connected with the first oscillating hydrofoil shaft 4. The second oscillating hydrofoil 1 is hinged, preferably connected through the 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 respectively set according to the first rocker arm 7 and the included angle of the second rocker arm 8 to switch the angle. As shown in Figure 2, A1 is the sectional symmetry line of the second oscillating hydrofoil, and A2 is the sectional symmetry line of the first oscillating hydrofoil. In the present invention, the angle of attack of the oscillating hydrofoil refers to the sectional symmetry of the oscillating hydrofoil. The angle between the line (such as A1, A2) and the tidal current direction D is positive if it is above the tidal current direction D, and negative if it is located below the tidal current direction D; as shown in Figure 2, the angle of attack b of the second oscillating hydrofoil is negative, The angle of attack b of the first oscillating hydrofoil is positive; the included angle between the first rocker arm 7 and the second rocker arm 8 here refers to the first rocker arm 7 and the second rocker arm along the tidal current direction D 8 between the angle a.

In this preferred embodiment, an angle control system is also included, and the angle control system is configured to control the first oscillating hydrofoil 2 respectively according to the set value of the included angle between the first rocker arm 7 and the second rocker arm 8 The angle value of the angle of attack and the angle of attack of the second oscillating hydrofoil 1. The angle control system includes an angle measuring instrument 22 for measuring the angle between the first rocker arm 7 and the second rocker arm 8 , and the angle measuring instrument 22 is arranged on the lower surface of the first rocker arm 7 and the upper surface of the second rocker arm 8 between the surfaces. The angle control system also includes a first drive device that provides power for the switch of the angle of attack of the first oscillating hydrofoil 2, namely the first motor 5; a second drive device that provides power for the switch of the angle of attack of the second oscillating hydrofoil 1, That is, the second motor 6; the 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 a preferred embodiment of the present invention, the set value of the included angle between the first rocker arm 7 and the second rocker arm 8 is 80°. The angle ranges of the angle of attack of the first oscillating hydrofoil 2 and the angle of attack of the second oscillating hydrofoil 1 are both -45° to 45°.

In a preferred embodiment of the present invention, a transmission gear device is also provided, and the two 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 transmits the mechanical energy of the first rocker arm 7 and the second rocker arm 8 to the generator. Mechanical energy is converted into electrical energy.

In a preferred embodiment of the present invention, the transmission gear device includes a first transmission gear and a second transmission gear that work independently. The transmission gear devices work independently, which can ensure that when one of the transmission gear devices stops working, the other can continue to work, and the two work without interference, which can ensure the stability of power generation. 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. The generator includes a stator 11 and a rotor 10 .

The first transmission gear includes a first driving wheel 15 and a first driven wheel 12 meshing with the first driving wheel 15 ; the first driving wheel 15 is connected to the second end of the first rocker arm 7 and is set as the first rocker arm 7 When rotating around the first axis C, the first driving wheel 15 is driven to rotate, and the first driving wheel 15 engages and drives the first driven wheel 12 to rotate; the rotation of the first driven wheel 12 drives the stator 11 of the generator fixedly connected to it relative to the generator. The rotor 10 rotates to generate electricity.

The second transmission gear includes a second driving wheel 16 and a second driven wheel 9 meshing with the second driving wheel; the second driving wheel 16 is connected with the second end of the second rocker arm 8 and is arranged so that the second rocker arm 8 surrounds The rotation of the first axis C drives the second driving wheel 16 to rotate, and the second driving wheel 16 engages to drive 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 it to rotate relative to the generator The stator 11 rotates to generate electricity.

As shown in FIG. 1 , the second end of the first rocker arm 7 , the second end of the second rocker arm 8 , the second driving wheel 16 , and the first driving wheel 15 are arranged in sequence from top to bottom, and pass through the first main shaft 18 In series, the first main shaft 18 is supported by the strong support 14 to the inner surface of the bottom surface of the floating box 19 . From top to bottom, the second driven wheel 9 , the rotor 10 of the generator, the stator 11 of the generator, and the first driven wheel 12 are arranged in sequence and connected in series through the fixed shaft 13 , and the end of the fixed shaft is supported on the bottom surface of the floating box 19 . on the inner surface.

The second end of the second rocker arm 8 is fixedly connected to the second driving wheel 16 through the second main shaft 17 , and the axis of the second main shaft 17 and the rotation axis of the second driving wheel 16 coincide with the first axis C; the second main shaft 17 Passing through the top of the floating box 19 from above and extending into the floating box 19, the second main shaft 17 cooperates with the floating box through the first bearing when passing through the top of the floating box 19; the second main shaft 17 is provided with a through hole, the The axis of the hole coincides with the first axis C.

The second end of the first rocker arm 7 is fixedly connected to the first driving wheel 15 through the 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 It extends from the second end of the first rocker arm 7 through the through hole of the second main shaft 17 to the bottom of the floating box 19 ;

The second main shaft 17 is supported on the floating case 19 by the first bearing and the second bearing.

In the preferred embodiment of the present invention, both the rotor and stator of the transmission gear unit and the generator are arranged in the floating box 19 .

As shown in FIG. 3 and FIG. 4 , in a preferred embodiment of the present invention, the first oscillating hydrofoil 2 and the second oscillating hydrofoil 1 are both set in the shape of an airfoil.

In yet another preferred embodiment of the present invention, which is similar to the embodiment shown in FIGS. 1 and 2 , the same reference numerals as those in FIGS. 1 and 2 are used for the parts and components. The difference between the present embodiment and the previous embodiments is that the power generating device can work either at a position close to the seabed surface or at a position close to the sea surface. An oscillating hydrofoil tidal current energy generating device includes an energy absorbing device that converts tidal current energy into mechanical energy, and a generator that converts mechanical energy into electrical energy; the energy absorbing device includes a first rocker arm 7 and a first rocker arm 7 . The first oscillating hydrofoil 2 with hinged ends, the second rocker arm 8, the 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 rocker arm 8 The second ends of the s are respectively connected to the generator; the first rocker arm 7 and the second rocker arm 8 are set to stagger and swing without interfering with each other. The first oscillating hydrofoil 2 and the second oscillating hydrofoil 1 are respectively connected flexibly, which is convenient to change the angle of their attack angle.

In yet another preferred embodiment, in order to realize that the first rocker arm 7 and the second rocker arm 8 swing alternately without interfering with each other, the following arrangement is preferably adopted. Both the first end of the first rocker arm 7 and the first end of the second rocker arm 8 pass through the first axis C, and the length of the first end of the first rocker arm 7 extending toward the second end is greater than the length of the second rocker arm 8 The length of the first end extending to its second end, the first rocker arm 7 is arranged to be located above the second rocker arm 8 .

In yet another preferred embodiment, the angle of attack of the first oscillating hydrofoil 2 and the angle of attack of the second oscillating hydrofoil 1 are respectively set according to the set value of the included angle of the first rocker arm 7 and the second rocker arm 8. Angle switch.

In yet another preferred embodiment, the power generating device further includes an angle control system, which is configured to control the first oscillating water respectively according to the set value of the included angle between the first rocker arm 7 and the second rocker arm 8. Angle value of the angle of attack of the wing 2 and the angle of attack of the second oscillating hydrofoil 1 . Further, the angle control system includes an angle measuring instrument 22 for measuring the included angle between the first rocker arm 7 and the second rocker arm 8 along the direction of the tidal current, and a first angle measuring instrument 22 for providing power for switching the angle of attack of the first oscillating hydrofoil 7 . A driving device, a second driving device that provides power for switching the angle of attack of the second oscillating hydrofoil 8, an angle controller 21, and the angle controller 21 is electrically connected to the angle measuring instrument 22, the first driving device, and the second driving device.

In a preferred embodiment of the present invention, when there are two energy absorbing devices, the basic working principle of the power generation device is as follows: the first oscillating hydrofoil and the second oscillating hydrofoil drive the first rocker arm and the second oscillating hydrofoil respectively under the action of the tidal current. The swing of the rocker arm, the swing of the first rocker arm and the second rocker arm respectively drives the first driving wheel and the second driving wheel in the floating box to rotate, so as to transmit to the first driven wheel and the second driven wheel fixed on the generator respectively. , to make the generator work to generate electric energy; it should be noted that the power generation systems of the first rocker arm and the second rocker arm are independent and will not interfere with each other, that is, when one of them fails and does not move, the other can be normal. Work, drive the rotor or stator of the generator to rotate and generate electricity. Specifically, detailed description will be given with reference to the flowcharts of FIGS. 5 , 6 , 7 , 8 , 9 and 10 .

Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and Fig. 10 are the working flow state diagrams of the power generating device when there are two energy absorbing devices; in these six pictures, the first rocker arm 7 is a longer rocker arm (at the bottom of FIG. 5 ), the right end is connected to the first oscillating hydrofoil 2 , the other is shorter is the second rocker arm 8 (located above in FIG. 5 ), and the right end is connected to the second oscillating hydrofoil 1 . As shown in FIG. 5 , in the starting position, the first rocker arm 7 (located below in FIG. 5 ) and the second rocker arm 8 (located at the top of FIG. 5 ) are in a position parallel to the tidal current direction D, and the first oscillating hydrofoil 2 The angle of attack of the second oscillating hydrofoil 1 is adjusted to -45°, and the angle of attack of the second oscillating hydrofoil 1 is adjusted to 45°; under the action of the tidal current, the first oscillating hydrofoil 2 is acted by a force, so that the first rocker arm 7 revolves around the first axis C rotates counterclockwise, the first main shaft 18 fixed on the second end of the first rocker arm 7 rotates and drives the second driving wheel 15 to rotate, and the first driving wheel 15 drives the first driven wheel 12 to rotate, which can make the first driven wheel 12 rotate. 12. The fixed generator stator 11 rotates relative to the generator rotor 10, so that the generator generates electricity; under the action of the tidal current, the second oscillating hydrofoil 1 is subjected to a force, so that the second rocker arm 8 revolves around the first axis C Rotating clockwise, the second main shaft 17 fixed on the second end of the second rocker arm 8 rotates and drives the second driving wheel 16 to rotate, and the second driving wheel 16 drives the second driven wheel 9 to rotate, which can make the second driven wheel 9 rotate. The fixed generator rotor 10 rotates relative to the generator stator 11, thereby enabling the generator to generate electricity. As shown in FIG. 6 , when the first rocker arm 7 and the second rocker arm 8 swing to their included angle of 80°, the angle controller 21 in the floating box 19 will receive the signal from the angle measuring instrument 22 to output The signal is sent to the first motor 5 and the second motor 6 to adjust the angle of attack of the first hydrofoil 2 to 45°, and the angle of attack of the second hydrofoil 1 to -45°, as shown in Figure 7, so that the The opposite movement occurs, 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 Figure 8, Figure 9 and Figure 10; Perform periodic motion in the order of Fig. 5-Fig. 6-Fig. 7-Fig. 8-Fig. 9-Fig. 10-Fig. 5, realizing the present invention captures tidal current energy through hydrofoils, converts it into mechanical energy, and then converts it into electrical energy for storage . During the periodic motion, the motion of the first rocker arm 7 and the second rocker arm 8 is always relative, so that the movement of the stator 11 and the rotor 10 of the generator is always relative. One can continue to generate electricity.

As shown in FIG. 11 , when the flow direction changes, the first rocker arm 7 and the second rocker arm 8 will rotate around the first axis C according to the flow direction to a position where the flow direction is parallel, and then continue to repeat the aforementioned movement to generate electricity. FIG. 11 shows the relative position of the power generating device after a 180° shift in the power flow direction D with respect to FIG. 1 . The self-adaptive adjustment to different flow directions is realized.

The preferred embodiments of the present invention have been described in detail above. It should be understood that many modifications and changes can be made according to the concept of the present invention by those skilled in the art without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (20)

1. An oscillating hydrofoil tidal current energy generating device is characterized in that, comprising an energy absorbing device that converts tidal current energy into mechanical energy, and a generator that converts the mechanical energy into electrical energy; the energy absorbing device comprises a rocker arm, the 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 . The oscillating hydrofoil tidal current energy generating device according to claim 1 , wherein the rocker arm is arranged to protrude from the water surface. 3 . 3. The oscillating hydrofoil tidal current power generation device of claim 1, wherein the oscillating hydrofoil is configured to provide buoyancy to the floating energy-absorbing power generation assembly. 4. The oscillating hydrofoil tidal current energy power generation device according to claim 3, characterized in that it further comprises a pontoon, the generator is arranged in the pontoon, and the pontoon is arranged to supply the power to the pontoon. Floating energy-absorbing power generation components provide buoyancy. 5 . The oscillating hydrofoil tidal current energy generating device according to claim 1 , wherein the number of said energy absorbing devices is set to two. 6 . The oscillating hydrofoil tidal current energy generating device according to claim 5, wherein the energy absorbing device comprises a first rocker arm, a first oscillating hydrofoil connected to the first end of the first rocker arm , a second rocker arm, a second oscillating hydrofoil connected to 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 staggeredly without interfering with each other. 7 . The oscillating hydrofoil tidal current energy generating device according to claim 6 , wherein the first end of the first rocker arm and the first end of the second rocker arm pass through the first axis, and the The length of the first end of the first rocker arm extending to the second end thereof is greater than the length of the first end of the second rocker arm extending to the second end thereof, and the first rocker arm is arranged to be located at the second end of the first rocker arm. above the rocker arm. 8 . The oscillating hydrofoil tidal current energy generating device according to claim 7 , wherein the first rocker arm and the second rocker arm are respectively configured to rotate 360° around the first axis. 9 . 9. The oscillating hydrofoil tidal current energy generating device according to claim 6, wherein the first end of the first rocker arm is hinged with the first oscillating hydrofoil. 10. The oscillating hydrofoil tidal current energy generating device according to claim 6, wherein the first end of the second rocker arm is hinged with the second oscillating hydrofoil. 11. The oscillating hydrofoil tidal current energy generating device according to claim 6, wherein the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil are respectively set according to the first oscillating hydrofoil. The angle between the first rocker arm and the second rocker arm is switched. 12. The oscillating hydrofoil tidal current energy generating device according to claim 11, further comprising an angle control system, the angle control system being configured to depend on the relationship between the first rocker arm and the second rocker arm. The set value of the included angle between them respectively controls the angle value of the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil. 13. The oscillating hydrofoil tidal current energy generating device according to claim 12, wherein the angle control system comprises an angle measuring instrument for measuring the angle between the first rocker arm and the second rocker arm , a first driving device that provides power for switching the angle of attack of the first oscillating hydrofoil, a second driving device that provides power for switching the angle of attack of the second oscillating hydrofoil, and an angle controller, the angle controller It is electrically connected to the angle measuring instrument, the first driving device, and the second driving device. 14. The oscillating hydrofoil tidal current energy generating device according to claim 13, wherein the angle measuring instrument is arranged between the lower surface of the first rocker arm and the upper surface of the second rocker arm . 15. The oscillating hydrofoil tidal current energy generating device according to claim 13, wherein the first driving device comprises a first motor. 16. The oscillating hydrofoil tidal current energy generating device according to claim 13, wherein the second driving device comprises a second motor. 17. The oscillating hydrofoil tidal current energy generating device according to claim 13, wherein the set value of the included angle between the first rocker arm and the second rocker arm is 80°. 18 . The oscillating hydrofoil tidal current energy generating device according to claim 13 , wherein the angle of attack of the first oscillating hydrofoil and the angle of attack of the second oscillating hydrofoil are both -45°. 19 . ~45°. 19. The oscillating hydrofoil tidal current energy generating device of claim 13, wherein the first rocker arm and the second rocker arm are configured to rotate about the first axis in opposite directions. 20. The oscillating hydrofoil tidal current energy power generation device according to claim 19, wherein the first oscillating hydrofoil and the second oscillating hydrofoil are set to be under the action of water flow, so that the first oscillating hydrofoil and the second oscillating hydrofoil are set to The rocker arm and the second rocker arm rotate about the first axis in opposite directions.

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