Wave power generation device based on magnetic liquid sealing

Abstract

The invention relates to the technical field of wave power generation, and particularly discloses a wave power generation device based on magnetic liquid sealing, the device comprises a shell, a reciprocating power generation mechanism, a first cavity and a second cavity, the reciprocating power generation mechanism divides the inner cavity of the shell into a first chamber and a second chamber which are not communicated with each other, the reciprocating power generation mechanism comprises a first coil, a first magnetic assembly and magnetic liquid, the magnetic liquid is arranged between the first magnetic assembly and the inner wall of the shell, and the first magnetic assembly can be in sliding connection with the shell in the first direction through the magnetic liquid. The first cavity and the second cavity are arranged on the two sides of the reciprocating power generation mechanism respectively, an inner cavity of the first cavity communicates with the first cavity, an inner cavity of the second cavity communicates with the second cavity, the first cavity and / or the second cavity deform to apply acting force to the first magnetic assembly, and the first magnetic assembly can slide to change the magnetic flux of the first coil. Weak waves or irregular waves in different directions can be converted into electric energy, and the power generation efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of wave energy power generation, and in particular to a wave energy power generation device based on magnetic liquid sealing. Background Art

[0002] Widely distributed marine sensors are the basis for ocean monitoring and play an important role in the development of smart oceans. However, a key bottleneck restricting the development of various marine sensors is the supply of electricity. At present, the main power supply methods for marine sensors include batteries, solar power generation and wave power generation. The capacity and service life of batteries are limited, and they need to be replaced and charged frequently. Solar power generation is greatly affected by the rotation of the earth, latitude and climate. In contrast, the constantly rising and falling waves on the sea contain abundant energy. Electromagnetic wave power generation devices that convert wave energy into electrical energy through the law of electromagnetic induction have broad application prospects.

[0003] Most of the existing wave energy power generation devices rely on waves to drive the float to move up and down, and drive the rotor to rotate through a hydraulic system or a mechanical transmission structure, thereby realizing the conversion of kinetic energy into electrical energy. Since the hydraulic system or mechanical transmission structure consumes energy, this method works well when the waves are large and the vibration is large, but is inefficient when the waves are small and the vibration is small. In another oscillating water column wave energy power generation device, a tubular container connected to the seawater is mainly used. The change in the position of the water surface caused by the waves causes the air volume in the container to change, forming an airflow, which drives the impeller to rotate to drive the main body of the power generation equipment to move. However, the tubular container mainly collects wave fluctuations acting on the pipe mouth range of the tubular container, requires large wave fluctuations, and has low efficiency in converting wave energy for weak waves or irregular waves in different directions. Summary of the invention

[0004] The object of the present invention is to provide a wave energy power generation device based on magnetic liquid sealing, so as to solve the problem of low wave conversion efficiency of the power generation device in the related art.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a wave energy power generation device based on magnetic liquid sealing, the wave energy power generation device comprising:

[0007] case;

[0008] A reciprocating power generation mechanism, wherein the reciprocating power generation mechanism divides the inner cavity of the shell into a first chamber and a second chamber which are not connected to each other; wherein the reciprocating power generation mechanism comprises a first coil, a first magnetic component and a magnetic liquid, wherein the first coil is arranged on the shell, the first magnetic component is arranged in the inner cavity of the shell, the magnetic liquid is arranged between the first magnetic component and the inner wall of the shell, and the first magnetic component can be slidably connected with the shell along a first direction through the magnetic liquid;

[0009] The first cavity and the second cavity are respectively arranged on both sides of the reciprocating electrostatic mechanism, the inner cavity of the first cavity is connected with the first cavity, and the inner cavity of the second cavity is connected with the second cavity, the first cavity and / or the second cavity can be deformed and exert force on the first magnetic component, and the first magnetic component can slide along the first direction to change the magnetic flux of the first coil.

[0010] In the wave energy power generation device based on magnetic liquid sealing, under the action of external forces such as wave impact, the first cavity of the above-mentioned wave energy power generation device is compressed and deformed, and the gas in the inner cavity of the first cavity is pressurized and flows into the first cavity. The gas in the first cavity is compressed to form compressed gas, and the air pressure in the first cavity increases to form a positive pressure state. The first magnetic component can be slidably suspended in the inner cavity of the shell through the magnetic liquid. The air pressure in the first cavity is greater than the air pressure in the second cavity. The compressed gas in the first cavity squeezes the first magnetic component, which can drive the first magnetic component to slide toward the second cavity. The first magnetic component slides relative to the first coil to change the magnetic flux of the first coil. The wave backflow applies a reverse force to the first cavity, or applies an extrusion force to the second cavity, and the gas in the second cavity is compressed to form compressed gas. The air pressure in the second cavity is greater than the air pressure in the first cavity. The compressed gas in the second cavity squeezes the first magnetic component, which can drive the first magnetic component to slide toward the first cavity. The first magnetic component slides relative to the first coil to change the magnetic flux of the first coil. In this cycle, the first magnetic component can slide back and forth relative to the first coil, so that the first coil continuously generates an induced current, thereby transmitting current to the external device.

[0011] In one embodiment, the reciprocating power generation mechanism further comprises:

[0012] a first fixed magnet connected to the housing and disposed in the first chamber;

[0013] A second fixed magnet, the second fixed magnet is connected to the shell and is arranged in the second chamber, the first fixed magnet and the second fixed magnet are respectively located on both sides of the first magnetic component, and the first fixed magnet and the second fixed magnet can respectively apply repulsive force to the first magnetic component.

[0014] In one embodiment, the housing comprises:

[0015] A cylinder, the axis of which extends along the first direction;

[0016] Two end covers are respectively detachably connected to the ends of the cylinder, the first fixed magnet and the second fixed magnet are arranged on the end covers, the first coil is sleeved on the outer circumference of the cylinder, and the first coil is clamped between the two end covers.

[0017] In one embodiment, the first magnetic assembly includes a plurality of first magnets and a first magnetic yoke, wherein the first magnets and the first magnetic yokes are alternately and stacked in sequence along the first direction, and two adjacent first magnets can exert a repulsive force on each other.

[0018] In one embodiment, the wave energy power generation device based on magnetic liquid sealing includes a piezoelectric generator, and the piezoelectric generator is arranged on the first cavity and / or the second cavity, and the piezoelectric generator covers at least a portion of the surface of the first cavity and / or the second cavity.

[0019] In one embodiment, the wave energy power generation device based on magnetic liquid seal further comprises a rotating power generation mechanism, wherein the rotating power generation mechanism is arranged between the first cavity and the shell, and / or the rotating power generation mechanism is arranged between the second cavity and the shell;

[0020] Wherein, the rotating power generation mechanism comprises:

[0021] A connecting shell, wherein the connecting shell is connected between the shell and the first cavity, and the first chamber, the inner cavity of the first cavity and the inner cavity of the connecting shell are connected; and / or the connecting shell is connected between the shell and the second cavity, and the second chamber, the inner cavity of the second cavity and the inner cavity of the connecting shell are connected;

[0022] A rotary shaft, the rotary shaft is rotatably disposed in the inner cavity of the connecting shell, and the rotary shaft is extended along the first direction;

[0023] a second magnetic component and a second coil, wherein the second magnetic component is fixedly disposed on the rotating shaft, the second coil is fixedly disposed on the connecting shell, the axis of the second magnetic component and the axis of the second coil are both disposed along the radial direction of the rotating shaft, and the second magnetic component can change the magnetic flux of the second coil when rotating with the rotating shaft;

[0024] A turbine is fixedly arranged on the rotating shaft. The deformation of the first cavity and / or the second cavity can exert a force on the turbine, and the turbine can drive the rotating shaft to rotate.

[0025] In one embodiment, a plurality of the second magnetic components and the second coil are provided, wherein the plurality of the second magnetic components are arranged at intervals along the circumference of the rotating shaft, and the plurality of the second coils are arranged at intervals along the circumference of the connecting shell.

[0026] In one embodiment, the second magnetic component includes a second magnet and a second yoke, the second yoke is connected to the rotating shaft, the second yoke is provided with an open slot, and the second magnet is connected to the open slot.

[0027] In one embodiment, the rotating power generation mechanism also includes a magnetic conductive ring, which is arranged on the outer circumference of the connecting shell, and the second coil has a through hole, and a coil yoke is arranged in the through hole, and the second coil and the coil yoke are both connected to the magnetic conductive ring at one end away from the rotating shaft.

[0028] In one embodiment, the turbine is configured as a symmetrical wing air wheel.

[0029] The beneficial effects of the present invention are:

[0030] (1) Both the first cavity and the second cavity can withstand the forces of waves from different directions and irregular waves to produce deformation, thereby collecting the vibration energy of the waves and improving the efficiency of collecting irregular wave energy.

[0031] (2) The first magnetic component and the shell are sealed by a magnetic liquid sliding seal, which has low friction. Even under weak wave conditions, wave energy can be converted into electrical energy with high conversion efficiency, which also increases the service life of the power generation device.

[0032] (3) The air pressure is used to convert the wave fluctuations into the movement of the first magnetic component, thereby avoiding the energy loss caused by the traditional mechanical transmission structure and improving the power conversion efficiency of the power generation device.

[0033] (4) The first fixed magnet and the second fixed magnet can not only limit the sliding range of the first magnetic assembly, but also exert magnetic repulsion force on the first magnetic assembly to reduce rigid collision and damage.

[0034] (5) The first magnetic assembly is designed as an alternating stacked structure of multiple first magnets and first magnetic yokes, and two adjacent first magnets can exert repulsive force on each other, which not only can ensure stable and reliable sealing and lubrication, but also can effectively improve the magnetic flux change rate and induced voltage of the first coil.

[0035] (6) A piezoelectric power generation sheet is arranged on the first cavity and / or the second cavity, which can recover the current generated by deformation based on the piezoelectric effect, thereby improving the power generation efficiency.

[0036] (7) A rotating power generation mechanism is arranged on one or both sides of the shell to convert the kinetic energy of the airflow between the first cavity and the first chamber and between the second cavity and the second chamber into electrical energy for recovery, thereby improving the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a wave energy power generation device based on magnetic liquid sealing in an embodiment of the present invention;

[0038] Figure 2 A cross-sectional view of a wave energy power generation device based on magnetic liquid sealing in an embodiment of the present invention;

[0039] Figure 3 It is a structural schematic diagram of a reciprocating power generation mechanism in an embodiment of the present invention;

[0040] Figure 4 is a schematic structural diagram of a first magnetic component in an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the end cover in an embodiment of the present invention;

[0042] Figure 6 is a cross-sectional view of a rotary power generation mechanism according to an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the positional relationship between the connecting shell and the base in an embodiment of the present invention;

[0044] Figure 8 It is a schematic diagram of the connection structure of the rotary shaft, the second magnetic assembly and the turbine in the rotary power generation mechanism in an embodiment of the present invention.

[0045] In the figure:

[0046] 1. Shell; 11. First chamber; 12. Second chamber; 13. Cylinder; 14. End cover; 141. Cover body; 142. Connecting ring; 143. Support block; 144. First air flow channel; 15. Positioning block;

[0047] 2. Re-energizing mechanism;

[0048] 21. first coil; 22. first magnetic assembly; 221. first magnet; 222. first magnetic yoke;

[0049] 23. Magnetic liquid; 24. First fixed magnet; 25. Second fixed magnet;

[0050] 3. The first cavity;

[0051] 4. The second cavity;

[0052] 5. Piezoelectric generator;

[0053] 6. Rotating power generation mechanism;

[0054] 61. connecting shell; 62. rotating shaft; 63. second magnetic assembly; 631. second magnet; 632. second magnetic yoke;

[0055] 64. Second coil; 65. Turbine; 66. Magnetic ring; 67. Coil yoke; 68. Base; 681. Groove; 682. Second air flow channel. DETAILED DESCRIPTION

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0059] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] like Figure 1 to Figure 2As shown, the X direction shown in the figure is a schematic diagram of the first direction. An embodiment of the present invention provides a wave energy power generation device based on magnetic liquid sealing, the wave energy power generation device includes a shell 1, a reciprocating power generation mechanism 2, a first cavity 3 and a second cavity 4, the inner cavity of the shell 1 of the reciprocating power generation mechanism 2 is divided into a first cavity 11 and a second cavity 12 that are not connected to each other, and the first cavity 11 and the second cavity 12 are independent chambers. The reciprocating power generation mechanism 2 includes a first coil 21, a first magnetic component 22 and a magnetic liquid 23, the first coil 21 is arranged on the shell 1, the first magnetic component 22 is arranged in the inner cavity of the shell 1, and the first coil 21 is located on the outer circumference of the first magnetic component 22.

[0061] The magnetic liquid 23 is arranged between the first magnetic component 22 and the inner wall of the shell 1. The first magnetic component 22 can be slidably connected to the shell 1 along the first direction through the magnetic liquid 23, and the inner cavity of the shell 1 is divided into a first chamber 11 and a second chamber 12 which are not connected to each other. That is, the magnetic liquid 23 can be adsorbed on the circumferential side wall of the first magnetic component 22, and a sliding seal is performed between the first magnetic component 22 and the inner wall of the shell 1, which not only enables the first magnetic component 22 and the shell 1 to have good sealing performance, but also the magnetic liquid 23 can separate the side wall of the first magnetic component 22 from the inner wall surface of the shell 1 to form a suspended state, thereby reducing the friction force during the relative sliding process between the first magnetic component 22 and the shell 1, and the sliding resistance is small and the sliding is smooth.

[0062] The first cavity 3 and the second cavity 4 are respectively arranged on both sides of the reciprocating power generation mechanism 2, the inner cavity of the first cavity 3 is connected with the first cavity 11, and the inner cavity of the second cavity 4 is connected with the second cavity 12. The first cavity 3 and / or the second cavity 4 can exert a force on the first magnetic component 22 by deformation, and the first cavity 3 and the second cavity 4 are both flexible shell structures with hollow inner cavities and capable of deformation.

[0063] With such a configuration, when in use, both the first cavity 3 and the second cavity 4 are filled with gas, one of the first cavity 3 and the second cavity 4 can face the waves, and the other can face away from the waves, and the two can form a certain distance. Taking the first cavity 3 facing the waves as an example, under the action of external forces such as wave impact, the first cavity 3 is compressed and deformed, and the gas in the inner cavity of the first cavity 3 flows into the first chamber 11 under pressure, and the gas in the first chamber 11 is compressed to form compressed gas. The air pressure in the first chamber 11 increases to form a positive pressure state, and the first magnetic component 22 can be slidably suspended in the inner cavity of the shell 1 through the magnetic liquid 23. The air pressure in the first chamber 11 is greater than the air pressure in the second chamber 12. The compressed gas in the first chamber 11 squeezes the first magnetic component 22, which can drive the first magnetic component 22 to slide toward the second chamber 12, and the first magnetic component 22 slides relative to the first coil 21 to change the magnetic flux of the first coil 21.

[0064] The wave backflow exerts a reverse force on the first cavity 3, or exerts an extrusion force on the second cavity 4, and the gas in the second cavity 12 is compressed to form compressed gas. The air pressure in the second cavity 12 is greater than the air pressure in the first cavity 11. The compressed gas in the second cavity 12 squeezes the first magnetic component 22, which can drive the first magnetic component 22 to slide toward the first cavity 11. The first magnetic component 22 slides relative to the first coil 21 to change the magnetic flux of the first coil 21. In this cycle, the first magnetic component 22 can slide back and forth relative to the first coil 21, so that the first coil 21 continuously generates an induced current, thereby transmitting current to the external device. Both the first cavity 3 and the second cavity 4 can withstand irregular wave forces from different directions to produce deformation, thereby collecting the vibration energy of the wave, and improving the collection efficiency of irregular wave energy. The first magnetic component 22 and the shell 1 are slidably sealed by the magnetic liquid 23, and the friction of the movement is small. Even under weak wave conditions, the wave energy can be converted into electrical energy, and the conversion power generation efficiency is high, which also improves the service life of the power generation device.

[0065] In this embodiment, the first cavity 3 and the second cavity 4 are both deformable structures under force. Optionally, the first cavity 3 and the second cavity 4 can be local structures of the shell 1. For example, part of the wall surface of the shell 1 can be designed as an elastic or flexible material wall surface, which can be deformed and compress the gas in the first chamber 11 or the second chamber 12 when subjected to external force. Optionally, the first cavity 3 and the second cavity 4 can also be independent components connected to the shell 1. For example, the first cavity 3 and the second cavity 4 can both include one or more airbags. When multiple airbags are provided, the multiple airbags are connected to the corresponding first chamber 11 or the second chamber 12. The material of the first cavity 3 and the second cavity 4 can be, but not limited to, a flexible material such as rubber, latex or soft plastic. Further, the material of the first cavity 3 and the second cavity 4 can be a flexible and elastic material, so that the first cavity 3 and the second cavity 4 can restore the deformation in time after the external force disappears.

[0066] like Figures 2 to 3As shown, in some embodiments, the reciprocating electrostatic mechanism 2 further includes a first fixed magnet 24 and a second fixed magnet 25, the first fixed magnet 24 is connected to the housing 1 and is disposed in the first chamber 11, the second fixed magnet 25 is connected to the housing 1 and is disposed in the second chamber 12, the first fixed magnet 24 and the second fixed magnet 25 are located on both sides of the first magnetic assembly 22, the first fixed magnet 24 and the second fixed magnet 25 can respectively apply a repulsive force to the first magnetic assembly 22, so that the sliding range of the first magnetic assembly 22 can be limited between the first fixed magnet 24 and the second fixed magnet 25. The repulsive force applied by the first fixed magnet 24 to the first magnetic assembly 22 and the repulsive force applied by the second fixed magnet 25 to the second magnetic assembly 63 can be the same or different, and when the first cavity 3 and the second cavity 4 are not subjected to external force, the first magnetic assembly 22 can be located in the initial position under the repulsive force of the first fixed magnet 24 and the second fixed magnet 25.

[0067] When the first cavity 3 is deformed by pressure, the squeezing force of the compressed gas in the first chamber 11 and the repulsive force of the first fixed magnet 24 on the first magnetic assembly 22 can overcome the repulsive force of the second fixed magnet 25 to slide toward the second fixed magnet 25. When the external force disappears, the first magnetic assembly 22 can move back to the initial position under the repulsive force of the second fixed magnet 25. When the second cavity 4 is deformed by pressure, the squeezing force of the compressed gas in the second chamber 12 and the repulsive force of the second fixed magnet 25 on the first magnetic assembly 22 can overcome the repulsive force of the first fixed magnet 24 to slide toward the first fixed magnet 24. When the external force disappears, the first magnetic assembly 22 can return to the initial position under the repulsive force of the first fixed magnet 24.

[0068] The first magnetic component 22 can slide between the first fixed magnet 24 and the second fixed magnet 25. The first fixed magnet 24 and the second fixed magnet 25 limit the sliding range of the first magnetic component 22, so as to facilitate the short-distance reciprocating sliding of the first magnetic component 22. In addition, there is a magnetic repulsive force between the first magnetic component 22 and the first fixed magnet 24 or the second fixed magnet 25, which can reduce the rigid collision between the first magnetic component 22 and the first fixed magnet 24 or the second fixed magnet 25 and reduce damage.

[0069] In this embodiment, when the first magnetic component 22 is in the initial position, the first fixed magnet 24 and the second fixed magnet 25 are symmetrically arranged about the first magnetic component 22, and the first fixed magnet 24 and the second fixed magnet 25 can be coaxially arranged with the first magnetic component 22, so that the first fixed magnet 24 and the second fixed magnet 25 can symmetrically apply force to the first magnetic component 22, reduce the rotation tendency of the first magnetic component 22, and reduce the torque of the first magnetic component 22.

[0070] like Figures 2 to 3As shown, in some embodiments, the housing 1 includes a cylinder 13 and two end covers 14, the axis of the cylinder 13 extends along the first direction, the two end covers 14 are detachably connected to the ends of the cylinder 13, and the connection between the end covers 14 and the cylinder 13 can be, but not limited to, bolt connection, clamping, bonding or plug-in. The first fixed magnet 24 and the second fixed magnet 25 are respectively arranged on the two end covers 14, the first coil 21 is sleeved on the outer circumference of the cylinder 13, and the first coil 21 is sandwiched between the two end covers 14, and the end cover 14 can limit the first coil 21 to reduce the movement of the first coil 21.

[0071] During installation, the first coil 21 can be sleeved on the outer circumference of the cylinder 13, the first magnetic assembly 22 and the magnetic liquid 23 extend into the interior of the cylinder 13, the first fixed magnet 24 is connected to the end cover 14 close to the first chamber 11, and the second fixed magnet 25 is connected to the end cover 14 close to the second chamber 12, and then the two end covers 14 are connected to the cylinder 13, the first coil 21 is clamped and positioned, and the first magnetic assembly 22 is also limited between the first fixed magnet 24 and the second fixed magnet 25.

[0072] like Figure 2-3 and Figure 5 As shown, in this embodiment, the end cover 14 includes a cover body 141, a connecting ring 142 and a plurality of supporting blocks 143. The cover body 141 is detachably connected to the cylinder body 13. The cover body 141 is a ring-shaped structure. A first airflow channel 144 is provided on the cover body 141. The first airflow channel 144 is extended along a first direction. The connecting ring 142 is provided in the first airflow channel 144. The radial dimension of the connecting ring 142 is smaller than the radial dimension of the first airflow channel 144. The plurality of supporting blocks 143 are provided at intervals along the circumference of the connecting ring 142. The connecting ring 142 is connected to the cover body 141 through the plurality of supporting blocks 143 so as to set the connecting ring 142 in the first airflow channel 144. The connecting ring 142 is rotatably connected to the rotary shaft 62. Further, a bearing may be provided between the connecting ring 142 and the rotary shaft 62 to improve the rotation flexibility of the rotary shaft 62. The first chamber 11 and the inner cavity of the first cavity 3 or the second chamber 12 and the inner cavity of the second cavity 4 can be connected through the first airflow channel 144. The ends of the plurality of support blocks 143 protrude from the ends of the connecting ring 142 along the first direction, and the plurality of support blocks 143 are arranged along the circumference of the connecting ring 142 to form an installation groove, and the installation groove is used for connection of the fixed magnet.

[0073] In addition, the shell 1 also includes a positioning block 15, which is arranged between the end of the end cover 14 and the end of the first coil 21. The positioning block 15 can support the first coil 21 from the end of the end cover 14 so that the first coil 21 is only mounted on a partial axial length of the cylinder 13, thereby increasing the axial setting space between the first chamber 11 and the second chamber 12, facilitating the formation of a sufficient pressure difference between the first chamber 11 and the second chamber 12, and increasing the sliding stroke of the first magnetic component 22 along the first direction.

[0074] like Figure 3 to Figure 4 As shown, in some embodiments, the first magnetic assembly 22 includes a plurality of first magnets 221 and a first magnetic yoke 222, the first magnets 221 and the first magnetic yoke 222 are arranged alternately and stacked in a first direction, and two adjacent first magnets 221 can exert a repulsive force on each other, that is, the ends of the two adjacent first magnets 221 that are close to each other have the same polarity, and the first magnetic yoke 222 has good magnetic conductivity, which can guide the direction of the magnetic lines of force and enhance the magnetic field strength at the edge of the end surface of the first magnet 221, so that the magnetic liquid 23 can be stably adsorbed on the circumference of the plurality of first magnets 221 to form a plurality of "O"-shaped magnetic liquid sealing rings, which can not only enhance the pressure resistance of the magnetic liquid seal, but also increase the radial magnetic liquid suspension force on the first magnetic assembly 22, so as to achieve stable and reliable sealing and lubrication. In addition, such a setting can also effectively improve the magnetic flux change rate of the first coil 21 and increase the induced voltage of the first coil 21.

[0075] In this embodiment, a plurality of first magnets 221 and first magnetic yokes 222 are provided. For example, three first magnets 221 may be provided and two first magnetic yokes 222 may be provided. The first magnetic yokes 222 are respectively provided between two adjacent first magnets 221. Regardless of the number of the first magnets 221 and the first magnetic yokes 222, the two ends of the first magnetic component 22 are always the first magnets 221, so that there is a good magnetic force between the first magnetic component 22 and the first fixed magnet 24 and the second fixed magnet 25.

[0076] like Figure 1 to Figure 2 As shown, in some embodiments, the wave energy power generation device based on magnetic liquid sealing includes a piezoelectric generator 5, which is arranged on the first cavity 3 and / or the second cavity 4. The piezoelectric generator 5 covers at least part of the surface of the first cavity 3 and / or the second cavity 4. When the surface of the first cavity 3 or the second cavity 4 and the piezoelectric generator 5 are subjected to external forces such as wave impact, they can deform together. The piezoelectric generator 5 will generate polarization based on the piezoelectric effect, thereby generating a voltage or charge between the two end surfaces of the piezoelectric generator 5, and the piezoelectric generator 5 can be connected to the transmission circuit to output current.

[0077] like Figure 2 as well as Figures 5 to 8As shown, in some embodiments, the wave energy power generation device based on magnetic liquid seal further includes a rotating power generation mechanism 6, which is disposed between the first cavity 3 and the shell 1, and / or, the rotating power generation mechanism 6 is disposed between the second cavity 4 and the shell 1, that is, the rotating power generation mechanism 6 may be provided with one, the rotating power generation mechanism 6 may be disposed between the first cavity 3 and the shell 1, or the rotating power generation mechanism 6 is disposed between the second cavity 4 and the shell 1, or, the rotating power generation mechanism 6 may be provided with two, the two rotating power generation mechanisms 6 may be disposed respectively between the first cavity 3 and the shell 1, and the rotating power generation mechanism 6 is disposed between the second cavity 4 and the shell 1. In this embodiment, the wave energy is converted into electrical energy by the reciprocating power generation mechanism 2, the rotating power generation mechanism 6 and the piezoelectric power generation sheet 5, thereby improving the wave energy power generation efficiency.

[0078] Specifically, the rotating power generation mechanism 6 includes a connecting shell 61, a rotating shaft 62, a second magnetic assembly 63, a second coil 64 and a turbine 65. The connecting shell 61 is connected between the housing 1 and the first cavity 3, and the inner cavity of the first chamber 11 and the first cavity 3 is connected to the inner cavity of the connecting shell 61, and / or the connecting shell 61 is connected between the housing 1 and the second cavity 4, and the inner cavity of the second chamber 12 and the second cavity 4 is connected to the inner cavity of the connecting shell 61. The rotating shaft 62 is rotatably arranged in the inner cavity of the connecting shell 61, and the axis of the rotating shaft 62 is extended along the first direction. The second magnetic assembly 63 is fixedly arranged on the rotating shaft 62, and the second coil 64 is fixedly arranged on the connecting shell 61. The axis of the second magnetic assembly 63 and the axis of the second coil 64 are both arranged along the radial direction of the rotating shaft 62. The second magnetic assembly 63 can change the magnetic flux of the second coil 64 when rotating with the rotating shaft 62. The turbine 65 is fixedly arranged on the rotary shaft 62 . The deformation of the first cavity 3 can exert a force on the turbine 65 , and the turbine 65 can drive the rotary shaft 62 to rotate.

[0079] With such arrangement, when the first cavity 3 or the second cavity 4 is compressed or deformed, airflow will be formed between the inner cavity of the first cavity 3, the inner cavity of the connecting shell 61 and the first cavity 11, and airflow will also be formed between the inner cavity of the second cavity 4, the inner cavity of the connecting shell 61 and the second cavity 12. The airflow drives the turbine 65 to rotate, and the rotation of the turbine 65 drives the rotating shaft 62 to rotate around the axis of the first direction. The rotation of the rotating shaft 62 drives the second magnetic component 63 to rotate. The second magnetic component 63 rotates to change the magnetic flux of the second coil 64, and an induced current is generated in the second coil 64, thereby transmitting current to the external device.

[0080] In this embodiment, a base 68 is provided at one end of the connection shell 61 away from the end cover 14, and the base 68 is rotatably connected to the rotary shaft 62. For example, a groove 681 is provided on the base 68, and the rotary shaft 62 extends into the groove 681 and is rotatably connected to the groove 681. A bearing may be provided between the rotary shaft 62 and the groove 681. A second airflow channel 682 is provided on the base 68, and the inner cavity of the first cavity 3 and the inner cavity of the connection shell 61 or the inner cavity of the second cavity 4 and the inner cavity of the connection shell 61 can be connected through the second airflow channel 682. The second airflow channel 682 can be configured as a plurality of hollow holes arranged circumferentially along the groove 681.

[0081] like Figures 6 to 8 As shown, in some embodiments, a plurality of second magnetic components 63 and second coils 64 are provided, wherein the plurality of second magnetic components 63 are arranged at circumferential intervals along the rotating shaft 62, and the plurality of second coils 64 are arranged at circumferential intervals along the connecting shell 61. With such arrangement, during the rotation of the rotating shaft 62, each second magnetic component 63 can be respectively aligned with and relatively rotated with different second coils 64, so as to increase the frequency of the induced current generated by the plurality of second coils 64 and improve the efficiency of electric energy recovery.

[0082] like Figures 6 to 8 As shown, in some embodiments, the second magnetic component 63 includes a second magnet 631 and a second magnetic yoke 632. The second magnetic yoke 632 is connected to the rotating shaft 62. The second magnetic yoke 632 is provided with an open slot, and the second magnet 631 is connected to the open slot. In this way, the second magnet 631 can be at least partially inserted or snapped into the open slot of the second magnetic yoke 632. The second magnetic yoke 632 not only has good magnetic conductivity, but also can firmly fix the second magnet 631.

[0083] In this embodiment, the second magnet 631 and the second yoke 632 can both be columnar structures, the axes of the second magnet 631 and the second yoke 632 can both extend radially along the rotating shaft 62 , and the magnetization direction of the second magnet 631 is along the radial direction of the rotating shaft 62 .

[0084] like Figure 1 to Figure 2 As shown, in some embodiments, the rotating power generation mechanism 6 also includes a magnetic ring 66, which is arranged on the outer circumference of the connecting shell 61, and the second coil 64 has a through hole, in which a coil yoke 67 is arranged, and the second coil 64 and the coil yoke 67 are connected to the magnetic ring 66 at one end away from the rotating shaft 62. In this way, the coil yoke 67 is in the through hole of the second coil 64, and can conduct magnetism and enhance the magnetic field of the second coil 64. The second coil 64 and the coil yoke 67 can support the magnetic ring 66 on the outer circumference of the connecting shell 61, thereby forming a circular closed magnetic circuit between the multiple second magnets 631 to increase the voltage.

[0085] In some embodiments, the turbine 65 is configured as a symmetrical-wing air wheel. A turbine using a symmetrical-wing air wheel is also called a Wells turbine. The symmetrical-wing air wheel includes a plurality of symmetrical airfoil blades evenly distributed along the hub. The installation angle of the blades is zero to form a planar rotor. When the first cavity 3 is compressed or deformed, the airflow flowing from the inner cavity of the first cavity 3 to the direction of the first chamber 11, or the airflow flowing from the first chamber 11 to the inner cavity of the first cavity 3 can drive the symmetrical-wing air wheel to rotate in the same direction. When the second cavity 4 is compressed or deformed, the airflow flowing from the inner cavity of the second cavity 4 to the direction of the second chamber 12, or the airflow flowing from the second chamber 12 to the inner cavity of the second cavity 4 can drive the symmetrical-wing air wheel to rotate in the same direction, and the energy conversion efficiency is high.

[0086] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A wave energy power generation device based on magnetic liquid sealing, characterized in that: include: Housing (1); A reciprocating power generation mechanism (2), the reciprocating power generation mechanism (2) dividing the inner cavity of the shell (1) into a first chamber (11) and a second chamber (12) which are not connected to each other; wherein the reciprocating power generation mechanism (2) comprises a first coil (21), a first magnetic component (22) and a magnetic liquid (23); the first coil (21) is arranged on the shell (1); the first magnetic component (22) is arranged in the inner cavity of the shell (1); the magnetic liquid (23) is arranged between the first magnetic component (22) and the inner wall of the shell (1); the first magnetic component (22) can be slidably connected to the shell (1) along a first direction through the magnetic liquid (23); The first cavity (3) and the second cavity (4) are arranged on both sides of the reciprocating power generation mechanism (2); the inner cavity of the first cavity (3) is connected to the first chamber (11); the inner cavity of the second cavity (4) is connected to the second chamber (12); the first cavity (3) and / or the second cavity (4) are capable of deforming and exerting a force on the first magnetic component (22); and the first magnetic component (22) is capable of sliding along the first direction to change the magnetic flux of the first coil (21).

2. The wave energy power generation device based on magnetic liquid seal according to claim 1 is characterized in that: The reciprocating power supply mechanism (2) further comprises: a first fixed magnet (24), the first fixed magnet (24) being connected to the housing (1) and disposed in the first chamber (11); A second fixed magnet (25), the second fixed magnet (25) is connected to the shell (1) and is arranged in the second chamber (12), the first fixed magnet (24) and the second fixed magnet (25) are respectively located on both sides of the first magnetic component (22), and the first fixed magnet (24) and the second fixed magnet (25) can respectively apply a repulsive force to the first magnetic component (22).

3. The wave energy power generation device based on magnetic liquid sealing according to claim 1 or 2, characterized in that: The housing (1) comprises: A cylinder (13), wherein the axis of the cylinder (13) is extended along the first direction; Two end covers (14), the two end covers (14) are respectively detachably connected to the ends of the cylinder (13), the first fixed magnet (24) and the second fixed magnet (25) are arranged on the end covers (14), the first coil (21) is sleeved on the outer circumference of the cylinder (13), and the first coil (21) is sandwiched between the two end covers (14).

4. The wave energy power generation device based on magnetic liquid seal according to claim 1 is characterized in that: The first magnetic assembly (22) comprises a plurality of first magnets (221) and a first magnetic yoke (222), wherein the first magnets (221) and the first magnetic yoke (222) are arranged alternately and in layers along the first direction, and two adjacent first magnets (221) can exert a repulsive force on each other.

5. The wave energy power generation device based on magnetic liquid sealing according to claim 1 is characterized in that: The wave energy power generation device comprises a piezoelectric power generation sheet (5), wherein the piezoelectric power generation sheet (5) is arranged on the first cavity (3) and / or the second cavity (4), and the piezoelectric power generation sheet (5) covers at least a portion of the surface of the first cavity (3) and / or the second cavity (4).

6. The wave energy power generation device based on magnetic liquid seal according to claim 1, characterized in that: The wave energy power generation device further comprises a rotating power generation mechanism (6), wherein the rotating power generation mechanism (6) is arranged between the first cavity (3) and the shell (1), and / or the rotating power generation mechanism (6) is arranged between the second cavity (4) and the shell (1); Wherein, the rotating power generation mechanism (6) comprises: a connecting shell (61), the connecting shell (61) being connected between the shell (1) and the first cavity (3), the first chamber (11), the inner cavity of the first cavity (3) and the inner cavity of the connecting shell (61) being in communication with each other; and / or the connecting shell (61) being connected between the shell (1) and the second cavity (4), the second chamber (12), the inner cavity of the second cavity (4) and the inner cavity of the connecting shell (61) being in communication with each other; A rotating shaft (62), the rotating shaft (62) being rotatably disposed in the inner cavity of the connecting shell (61), and the rotating shaft (62) being extended along the first direction; a second magnetic component (63) and a second coil (64), wherein the second magnetic component (63) is fixedly arranged on the rotating shaft (62), and the second coil (64) is fixedly arranged on the connecting shell (61); the axis of the second magnetic component (63) and the axis of the second coil (64) are both arranged radially along the rotating shaft (62); and the second magnetic component (63) can change the magnetic flux of the second coil (64) when rotating with the rotating shaft (62); A turbine (65), wherein the turbine (65) is fixedly arranged on the rotating shaft (62), and the first cavity (3) and / or the second cavity (4) can deform to exert a force on the turbine (65), and the turbine (65) can drive the rotating shaft (62) to rotate.

7. The wave energy power generation device based on magnetic liquid sealing according to claim 6 is characterized in that: A plurality of the second magnetic components (63) and the second coils (64) are provided. The plurality of the second magnetic components (63) are arranged at intervals along the circumference of the rotating shaft (62), and the plurality of the second coils (64) are arranged at intervals along the circumference of the connecting shell (61).

8. The wave energy power generation device based on magnetic liquid sealing according to claim 6 is characterized in that: The second magnetic component (63) comprises a second magnet (631) and a second magnetic yoke (632), wherein the second magnetic yoke (632) is connected to the rotating shaft (62), the second magnetic yoke (632) is provided with an open slot, and the second magnet (631) is connected to the open slot.

9. The wave energy power generation device based on magnetic liquid seal according to claim 6, characterized in that: The rotating power generation mechanism (6) further comprises a magnetic conductive ring (66), wherein the magnetic conductive ring (66) is arranged on the outer circumference of the connecting shell (61), the second coil (64) has a through hole, a coil yoke (67) is arranged in the through hole, and the ends of the second coil (64) and the coil yoke (67) away from the rotating shaft (62) are both connected to the magnetic conductive ring (66).

10. The wave energy power generation device based on magnetic liquid seal according to claim 6, characterized in that: The turbine (65) is configured as a symmetrical wing air wheel.

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