A magnetohydrodynamic wave energy power generation system

Abstract

The present invention relates to the technical field of wave energy power generation, and particularly relates to a magnetohydrodynamic wave energy power generation system. A magnetohydrodynamic wave energy power generation system includes: a driving mechanism, including a first floating body and a driving rod connected to each other, wherein a housing is sleeved on the outer periphery of the driving rod; a power generation mechanism, disposed in the housing and connected to the first floating body through the driving rod, the power generation mechanism includes an elastic deformation structure and a magnetohydrodynamic power generation structure disposed in the elastic deformation structure, a part of the elastic deformation structure is fixed to the inner wall of the housing, and the first floating body applies a deformation force to the elastic deformation structure through the driving rod so that the magnetohydrodynamic power generation structure generates an induced electromotive force. The present invention provides a magnetohydrodynamic wave energy power generation system that can improve the conversion efficiency of the wave energy power generation system from wave energy to electric energy.

Description

Technical Field

[0001] The present invention relates to the technical field of wave energy power generation, and particularly relates to a magnetohydrodynamic wave energy power generation system. Background Art

[0002] In a liquid metal magnetohydrodynamic generator, the working fluid passes through a magnetic field perpendicular to the flow direction at a certain speed, and an induced electromotive force is generated in the direction orthogonal to the magnetic field and the flow. Connecting a load realizes the output of electric energy. The linear reciprocating motion characteristics of the liquid metal magnetohydrodynamic generator match well with the large force, low frequency, low speed, and reciprocating motion characteristics of waves, enabling the direct conversion of wave energy into electric energy, and promising to achieve efficient, highly reliable, and low-cost conversion from wave energy to electric energy.

[0003] There is a conventional liquid metal magnetohydrodynamic wave energy power generation system. The main piston is driven by a water surface floating body to reciprocate vertically with the waves, causing the hydraulic oil pressure in the upper and lower auxiliary hydraulic cylinders to change. The auxiliary piston is squeezed to drive the liquid metal to reciprocally cut the magnetic lines of force in the power generation channel for power generation. However, due to the pressure difference on both sides of the auxiliary piston and the failure of the seal, etc., in the long-term operation, the hydraulic oil of the driving working fluid and the liquid metal of the power generation working fluid will leak internally. The conductivity of the liquid metal mixed into the hydraulic oil will decrease, which will greatly affect the conversion efficiency of the liquid metal magnetohydrodynamic generator. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that due to the pressure difference of the auxiliary piston and the failure of the seal, etc., the hydraulic oil of the driving working fluid and the liquid metal of the power generation working fluid leak internally, resulting in a reduction in the conversion efficiency of the liquid metal magnetohydrodynamic generator, so as to provide a magnetohydrodynamic wave energy power generation system that can improve the conversion efficiency of the wave energy power generation system from wave energy to electric energy.

[0005] To solve the above technical problem, the present invention provides a magnetohydrodynamic wave energy power generation system, including:

[0006] A driving mechanism, including a first floating body and a driving rod connected thereto. A housing is sleeved on the outer periphery of the driving rod.

[0007] A power generation mechanism is disposed in the housing and is connected to the first floating body through the driving rod. The power generation mechanism includes an elastic deformation structure and a magnetohydrodynamic power generation structure disposed within the elastic deformation structure. A part of the elastic deformation structure is fixed to the inner wall of the housing. The first floating body applies a deformation force to the elastic deformation structure through the driving rod, so that the magnetohydrodynamic power generation structure generates an induced electromotive force.

[0008] Optionally, the driving rod includes a connecting rod and a support rod. One end of the connecting rod is fixedly connected to the first floating body, and the other end is movably connected to the housing through a limiting frame. One end of the support rod is connected to the connecting rod, and the other end is connected to the elastic deformation structure.

[0009] Optionally, the connecting rod is successively provided with a first limiting block, a second limiting block, and a third limiting block in the vertical direction. The first limiting block is disposed between the first floating body and the upper end cover of the housing. The second limiting block is disposed between the upper end cover of the housing and the support rod. The third limiting block is disposed at the bottom of the connecting rod and is located below the limiting frame.

[0010] Optionally, the support rod and the power generation mechanism are both a pair of symmetrically arranged structures. Each support rod includes a first support rod and a second support rod. One end of the first support rod is connected to the upper surface of the elastic deformation structure, and the other end is connected to the connecting rod. One end of the second support rod is connected to the lower surface of the elastic deformation structure, and the other end is connected to the connecting rod. Thus, the first floating body drives the first support rod and the second support rod to move respectively, driving the elastic deformation structure to deform.

[0011] Optionally, it further includes a fixing member disposed in the housing. The elastic deformation structure is partially installed in the fixing member, and the connecting rod penetrates through the fixing member.

[0012] Optionally, the magnetohydrodynamic power generation structure includes a pair of oppositely arranged electrodes disposed in the fixing member, a magnetic field orthogonal to the pair of electrodes, and a liquid metal disposed in the oscillation space between the pair of electrodes. When the liquid metal is affected by the first floating body, it cuts the magnetic field.

[0013] Optionally, the elastic deformation structure includes an upper corrugated pipe and a lower corrugated pipe. The upper corrugated pipe is connected to the fixing member at the upper part of the housing, and the lower corrugated pipe is connected to the fixing member at the lower part of the housing.

[0014] Optionally, an upper sealing end is provided at the connection between the upper corrugated pipe and the first support rod, and a lower sealing end is provided at the connection between the lower corrugated pipe and the second support rod.

[0015] Optionally, it further includes a second floating body connected to the bottom of the housing. The second floating body is fixed to the seabed through an anchoring structure.

[0016] Optionally, the anchoring structure includes an anchor and an anchor chain.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The magnetohydrodynamic wave energy generation system provided by the present invention is provided with a driving mechanism, which includes a first floating body and a driving rod connected to each other. A housing is sleeved on the outer periphery of the driving rod. The power generation mechanism is arranged in the housing and is connected to the first floating body through the driving rod. The power generation mechanism includes an elastic deformation structure and a magnetohydrodynamic power generation structure arranged in the elastic deformation structure. A part of the elastic deformation structure is fixed to the inner wall of the housing. The first floating body applies a deformation force to the elastic deformation structure through the driving rod, so that the magnetohydrodynamic power generation structure generates an induced electromotive force. The present invention completes the power generation operation of the magnetohydrodynamic power generation structure through the mechanical connection between the driving rod and the elastic deformation structure, without going through the energy transfer of the hydraulic system, improves the energy transfer efficiency, and has a simple structure and low cost.

[0019] 2. In the magnetohydrodynamic wave energy generation system provided by the present invention, a first limiting block, a second limiting block and a third limiting block are sequentially arranged on the connecting rod in the vertical direction. The first limiting block is arranged between the first floating body and the upper end cover of the housing. The second limiting block is arranged between the upper end cover of the housing and the support rod. The third limiting block is arranged at the bottom of the connecting rod and is located below the limiting frame. The maximum displacement of the connecting rod is limited by the first limiting block and the second limiting block, and the third limiting block prevents the connecting rod from disengaging from the limiting frame, ensuring the stability of the connecting rod.

[0020] 3. In the magnetohydrodynamic wave energy generation system provided by the present invention, the elastic deformation structure is composed of an upper bellows and a lower bellows. The upper bellows is connected to the fixing member at the upper part of the housing, and the lower bellows is connected to the fixing member at the lower part of the housing. An upper sealing end is arranged at the connection between the upper bellows and the first support rod, and a lower sealing end is arranged at the connection between the lower bellows and the second support rod. The sealed bellows structure can prevent the problem of the reduction of power generation performance and reliability caused by the internal leakage of liquid metal. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the magnetohydrodynamic wave energy generation system;

[0023] Figure 2 It is a cross-sectional view of the fixing member;

[0024] Figure 3 It is a cross-sectional view of the limiting frame.

[0025] Description of the Reference Numerals:

[0026] 1 - First floating body; 2 - Housing; 3 - Upper sealing end; 4 - Upper corrugated pipe; 5 - Oscillation space;

[0027] 6 - Power generation channel; 7 - Electrode; 8 - Magnetic field; 9 - Liquid metal; 10 - Lower corrugated pipe;

[0028] 11 - Lower sealing end; 12 - Second floating body; 13 - Anchoring structure; 14 - Third limiting block;

[0029] 15 - Limiting frame; 16 - Second support rod; 17 - Power generation mechanism; 18 - Fixing part;

[0030] 19 - First support rod; 20 - Connecting rod; 21 - Second limiting block; 22 - First limiting block. Specific embodiments

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Such as Figure 1The specific implementation of a magnetohydrodynamic wave energy power generation system shown is used to convert wave energy into electrical energy, and includes a driving mechanism and a power generation mechanism 17.

[0036] The driving mechanism includes a first floating body 1 connected and arranged, and a driving rod. A housing 2 is sleeved on the outer periphery of the driving rod.

[0037] The power generation mechanism 17 is arranged in the housing 2, and includes an elastic deformation structure and a magnetohydrodynamic power generation structure arranged in the elastic deformation structure. The elastic deformation structure is connected to the first floating body 1 through the driving rod. Specifically, the driving rod includes a connecting rod 20 and a support rod. One end of the connecting rod 20 is fixedly connected to the first floating body 1, and the other end is movably connected to the housing 2 through a limiting frame 15. As Figure 2 shown, the limiting member 15 is in a circular ring structure, the circular ring structure is fixed on the inner wall of the housing 2, and a plurality of connecting rods are arranged in the circular ring structure. One ends of the plurality of connecting rods close to each other are connected to a support ring, and the connecting rod 20 penetrates through the support ring. The support rods and the power generation mechanism 17 are both a pair arranged symmetrically. Each support rod includes a first support rod 19 and a second support rod 16. One end of the first support rod 19 is connected to the upper surface of the elastic deformation structure, and the other end is connected to the connecting rod 20. One end of the second support rod 16 is connected to the lower surface of the elastic deformation structure, and the other end is connected to the connecting rod 20. So that the first floating body 1 drives the first support rod 19 and the second support rod 16 to move respectively through the connecting rod 20. Because a part of the elastic deformation structure is fixed to the inner wall of the housing 2, the movement of the first support rod 19 and the second support rod 16 can apply different deformation forces to different positions of the elastic deformation structure respectively, so that the magnetohydrodynamic power generation structure generates a larger induced electromotive force.

[0038] The connecting rod 20 is successively provided with a first limiting block 22, a second limiting block 21 and a third limiting block 14 along the vertical direction. The first limiting block 22 is arranged between the first floating body 1 and the upper end cover of the housing 2. The second limiting block 21 is arranged between the upper end cover of the housing 2 and the first support rod 19. The first limiting block 22 and the second limiting block 21 are both circular, and the diameter is larger than the diameter of the connecting rod 20. The third limiting block 14 is arranged at the bottom of the connecting rod 20 and is located below the limiting frame 15. The third limiting block 14 is also circular, and the diameter is larger than the inner diameter of the support ring. The first limiting block 22 and the second limiting block 21 limit the maximum displacement of the first floating body 1 and the connecting rod 20. The third limiting block 14 prevents the connecting rod 20 from disengaging from the limiting frame 15, ensuring the stability of the connecting rod 20.

[0039] The power generation mechanism 17 further includes a fixing member 18 arranged in the housing 2. As Figure 3 shown, the fixing member 18 is a cylinder, which is clamped on the inner wall of the housing 2, and a plurality of mounting holes are arranged on the fixing member 18. A part of the elastic deformation structure is installed in the fixing member 18, and the connecting rod 20 penetrates through the mounting hole in the middle of the fixing member 18.

[0040] The elastic deformation structure includes an upper bellows 4 and a lower bellows 10 respectively fixed to the upper surface and the lower surface of the fixing member 18, and the upper bellows 4 and the lower bellows 10 are arranged through the mounting holes of the fixing member 18. An oscillation space 5 is formed inside the upper bellows 4 and the lower bellows 10, and the oscillation space 5 is filled with liquid metal 9. The telescopic directions of the upper bellows 4 and the lower bellows 10 are the same as the moving direction of the first floating body 1. When the first floating body 1 drives the connecting rod 20 to move upward, the first strut 19 and the second strut 16 also move upward, thereby driving the upper bellows 4 to extend upward and the lower bellows 10 to be compressed upward. When the first floating body 1 drives the connecting rod 20 to move downward, the first strut 19 and the second strut 16 also move downward, thereby driving the upper bellows 4 to be compressed downward and the lower bellows 10 to extend downward, and the oscillation space 5 deforms. An upper sealing end 3 is also provided at the connection between the upper bellows 4 and the first strut 19, and a lower sealing end 11 is provided at the connection between the lower bellows 10 and the second strut 16 to ensure that the elastic deformation structure is a sealed structure, so that the liquid metal 9 will not cause a reduction in power generation performance and reliability due to internal leakage.

[0041] The magnetohydrodynamic power generation structure includes a pair of oppositely arranged electrodes 7 disposed in the mounting holes of the fixing member 18, a magnetic field 8 disposed orthogonally to the pair of electrodes 7, and a liquid metal 9 disposed in the oscillation space 5 between the pair of electrodes 7. The two electrodes 7 are spaced apart from each other to form a power generation channel 6. The liquid metal 9 and the two electrodes 7 are adapted to be connected to an external power storage device to form an electric circuit. Specifically, two magnets with opposite magnetic polarities are provided on the mounting holes of the fixing member 18, and the two magnets are arranged oppositely to form a magnetic field 8 in the region between the two magnets. The direction of the magnetic field 8 is perpendicular to the moving direction of the liquid metal 9 to form an induced electromotive force.

[0042] To ensure the overall stability of the magnetohydrodynamic wave energy generation system, a second floating body 12 is further connected to the bottom of the housing 2. The second floating body 12 is fixed to the seabed through an anchoring structure 13, and the anchoring structure 13 includes an anchor and an anchor chain. Specifically, both the first floating body 1 and the second floating body 12 are hollow cylinders. The first floating body 1 floats on the water surface, and the second floating body 12 serves as an adjustable ballast damping device to reduce the response of the housing 2 to waves.

[0043] When in use, the first floating body 1 reciprocates under the action of waves, thereby driving the connecting rod 20 to move together. The connecting rod 20 drives the first strut 19 and the second strut 16 to move simultaneously. Since both the first strut 19 and the second strut 16 are connected to the oscillation space 5, the oscillation space 5 is driven to deform. The liquid metal 9 in the oscillation space 5 reciprocates to cut the magnetic field 8 through the power generation channel 6 to output electric energy.

[0044] As an alternative embodiment, the first floating body 1 is directly connected to one end of a bellows through the connecting rod 20, and the other end of the bellows is connected to the fixing member 18.

[0045] As an alternative embodiment, the elastic deformation structure can also be other deformable cylinders, such as rubber cylinders.

[0046] As an alternative embodiment, the support rods and the power generation mechanism 17 can also be multiple ones that are evenly and correspondingly distributed.

[0047] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A magnetohydrodynamic wave energy power generation system, characterized in that, Comprising: A driving mechanism, including a first floating body (1) and a driving rod which are connected and arranged, and a housing (2) is sleeved on the outer periphery of the driving rod; A power generation mechanism (17) is arranged in the housing (2) and is connected to the first floating body (1) through the driving rod. The power generation mechanism (17) includes an elastic deformation structure and a magnetohydrodynamic power generation structure arranged in the elastic deformation structure. Part of the elastic deformation structure is fixed to the inner wall of the housing (2), and the first floating body (1) applies a deformation force to the elastic deformation structure through the driving rod so that the magnetohydrodynamic power generation structure generates an induced electromotive force; The driving rod includes a connecting rod (20) and a support rod. One end of the connecting rod (20) is fixedly connected to the first floating body (1), and the other end is movably connected to the housing (2) through a limiting frame (15). One end of the support rod is connected to the connecting rod (20), and the other end is connected to the elastic deformation structure; It further includes a fixing member (18) arranged in the housing (2). Part of the elastic deformation structure is installed in the fixing member (18), and the connecting rod (20) penetrates through the fixing member (18); The magnetohydrodynamic power generation structure includes a pair of electrodes (7) arranged oppositely in the fixing member (18), a magnetic field (8) arranged orthogonally to the pair of electrodes (7), and a liquid metal (9) arranged in an oscillation space (5) between the pair of electrodes (7). When the liquid metal (9) is affected by the first floating body (1), it cuts the magnetic field (8); The elastic deformation structure includes an upper corrugated pipe (4) and a lower corrugated pipe (10). The upper corrugated pipe (4) is connected to the fixing member (18) at the upper part of the housing (2), and the lower corrugated pipe (10) is connected to the fixing member (18) at the lower part of the housing (2).

2. The magnetohydrodynamic wave energy power generation system according to claim 1, characterized in that, The connecting rod (20) is sequentially provided with a first limiting block (22), a second limiting block (21) and a third limiting block (14) in the vertical direction. The first limiting block (22) is arranged between the first floating body (1) and the upper end cover of the housing (2), the second limiting block (21) is arranged between the upper end cover of the housing (2) and the support rod, and the third limiting block (14) is arranged at the bottom of the connecting rod (20) and is located below the limiting frame (15).

3. The magnetohydrodynamic wave energy power generation system according to claim 2, characterized in that, Both the support rod and the power generation mechanism (17) are a pair of symmetrically arranged structures. Each support rod includes a first support rod (19) and a second support rod (16). One end of the first support rod (19) is connected to the upper surface of the elastic deformation structure, and the other end is connected to the connecting rod (20). One end of the second support rod (16) is connected to the lower surface of the elastic deformation structure, and the other end is connected to the connecting rod (20), so that the first floating body (1) drives the first support rod (19) and the second support rod (16) to move respectively, and drives the elastic deformation structure to deform.

4. The magnetohydrodynamic wave energy power generation system according to claim 3, wherein An upper sealing end (3) is arranged at the connection between the upper corrugated pipe (4) and the first support rod (19), and a lower sealing end (11) is arranged at the connection between the lower corrugated pipe (10) and the second support rod (16).

5. The magnetohydrodynamic wave energy power generation system according to any one of claims 1-4, characterized in that, It further includes a second floating body (12) connected to the bottom of the housing (2), and the second floating body (12) is fixed to the seabed through an anchoring structure (13).

6. The magnetohydrodynamic wave energy power generation system according to claim 5, wherein The anchoring structure (13) includes an anchor and an anchor chain.

Images