Vibration energy capturing device applied to wind generating set
By designing a vibration energy capture device that uses nonlinear magnetic force and moment of inertia to drive the bending power beam, the problem of ultra-low frequency, large amplitude and multi-directional vibration energy capture in wind turbines is solved, and an efficient energy capture effect is achieved.
Patent Information
- Application Number
- CN202411988916.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-15
AI Technical Summary
The prior art is difficult to efficiently capture ultra-low frequency, large amplitude and multi-directional vibration energy in wind turbines.
A vibration energy capture device is designed to drive the bending generator beam to generate electricity using nonlinear magnetic force and moment of inertia to achieve adaptive position adjustment and nonlinear design of the generator beam through cross-arranged slide chutes and sliding magnets.
In the ultra-low frequency, large amplitude and multi-directional vibration environment of wind turbines, the better vibration energy capture effect is achieved, and the output power and frequency response range of the energy capture system are improved.
Smart Images
Figure CN119834650A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of vibration energy capture devices, and in particular to a vibration energy capture device applied to a wind turbine generator set. Background Art
[0002] As the global demand for renewable energy grows, wind power generation, as a clean and sustainable form of energy, is becoming increasingly important, and wind turbines are the core equipment for achieving this transformation process. In order to continuously monitor the operating status and operation conditions of key components of wind turbines, a large number of sensor nodes, such as wind speed sensors, vibration sensors, and displacement sensors, are arranged on the fuselage. Currently, these sensors are mainly powered by wired power or electrochemical batteries, which have wiring difficulties, environmental pollution, and life problems. Therefore, collecting energy from the environment (solar energy, wind energy, vibration energy, etc.) to wirelessly power the sensors has become a feasible solution.
[0003] There is abundant vibration energy available in wind turbines. For example, offshore wind turbines vibrate all day long under the action of waves and wind. In addition, land-based wind turbines also vibrate in breezes and when working. How to effectively use the vibration energy of wind turbines to provide power for sensor networks has become a research direction that has attracted much attention. At present, the recovery of vibration energy is mainly achieved through piezoelectric or electromagnetic conversion mechanisms. Among them, piezoelectric materials have become a research hotspot due to their high electromechanical coupling efficiency, low cost and environmental protection characteristics, but current research based on piezoelectric materials mainly focuses on the dynamic and electrical performance of energy capture devices under small amplitude oscillations and single vibration directions. How to achieve efficient vibration energy capture based on the actual service conditions of wind turbines and comprehensively consider the vibration characteristics of ultra-low frequency, large amplitude and multi-direction is still a bottleneck problem restricting the development of energy capture technology.
[0004] Therefore, how to propose a vibration energy capture device for wind turbines that can effectively utilize nonlinear magnetic force and moment of inertia to drive the curved power generation beam to generate electricity, so as to achieve efficient capture of the vibration energy of the wind turbine under ultra-low frequency, large amplitude and multi-directional excitation is an issue that technical personnel in this field urgently need to solve. Summary of the invention
[0005] In view of this, the present invention proposes a vibration energy capture device for use in wind turbines, aiming to solve the technical problem that the above-mentioned traditional vibration energy capture device cannot efficiently capture the ultra-low frequency, large amplitude and multi-directional vibration energy of wind turbines.
[0006] In order to achieve the above object, the present invention adopts the following technical solution:
[0007] The present invention provides a vibration energy capture device applied to a wind turbine generator set, comprising:
[0008] A base is used to connect the wind turbine generator set to transmit vibration; the top surface of the base is provided with a first slide groove and a second slide groove; the first slide groove and the second slide groove are arranged crosswise and connected;
[0009] A vibration energy capture component, the vibration energy capture component comprising a power generation beam, a fixed magnet 1, a fixed magnet 2, a fixed magnet 3, a fixed magnet 4, a sliding magnet 1 and a sliding magnet 2;
[0010] The power generation beam is arranged corresponding to the top surface of the base; the sliding magnet 1 is hinged at one end of the power generation beam and is slidably connected in the slide slot 1; the fixed magnet 1 and the fixed magnet 2 are installed in a one-to-one correspondence at both ends of the length direction in the slide slot 1, so as to drive the sliding magnet 1 to slide through the nonlinear magnetic repulsion force when the base vibrates; the sliding magnet 2 is hinged at the other end of the power generation beam and is slidably connected in the slide slot 2; the fixed magnet 3 and the fixed magnet 4 are installed in a one-to-one correspondence at both ends of the length direction in the slide slot 2, so as to drive the sliding magnet 2 to slide through the nonlinear magnetic repulsion force when the base vibrates; the sliding magnet 1 and the sliding magnet 2 that slide under force jointly drive the power generation beam to undergo buckling strain to generate electricity;
[0011] Conductors electrically connect the power generation beams to transmit captured electrical energy.
[0012] When a vibration energy capture device applied to a wind generator set of the present invention is used, the base is installed on the wind generator set. When the vibration excitation of the wind generator set in a direction parallel to the top surface of the base acts on the base, the base will be displaced. When the base is displaced along the first slide slot, the sliding magnet first located in the first slide slot will be relatively displaced. The first fixed magnet or the second fixed magnet gradually approaches the first sliding magnet and generates a nonlinear magnetic repulsion to push the first sliding magnet to slide. The sliding first sliding magnet pushes the power generation beam to deflect, thereby driving the second sliding magnet to slide in the second slide slot. The second sliding magnet gradually approaches the third fixed magnet or the fourth fixed magnet and generates a nonlinear magnetic repulsion. Finally, both ends of the power generation beam are subjected to the nonlinear magnetic repulsion and bend to generate electricity, converting the vibration energy into electrical energy. The wire is used to transmit the electrical energy captured by the power generation beam. Similarly, when the base is excited in other directions, the power generation beam will also undergo buckling strain to convert the vibration energy of the wind generator set into electrical energy. The vibration energy capture device of the present invention has a simple structure, and the cross-arranged slide grooves 1 and 2 enable the power generation beam to perform adaptive position adjustment according to the external environmental vibration excitation. The present invention introduces nonlinear magnetic force to provide a constant positive axial force for the power generation beam, thereby reducing the natural frequency of the power generation beam and the stiffness of the aluminum beam, so that the power generation beam will also have a large deformation in an ultra-low frequency environment. At the same time, the nonlinear design of the device is realized, the output power of the energy capture system is further improved, the frequency response range is expanded, and the bandwidth advantage of nonlinear acquisition is maintained, so that the vibration energy capture device of the present invention can also achieve a better energy capture effect in the ultra-low frequency, large amplitude and multi-directional vibration environment of the wind turbine.
[0013] As a further improvement of the above technical solution, the power generation beam includes an elastic plate and a piezoelectric film attached to the surface of the elastic plate; the wire is electrically connected to the piezoelectric film; both ends of the elastic plate in the length direction are hinged to the sliding magnet one and the sliding magnet two through hinge components.
[0014] The beneficial effect of the above technical solution is that when sliding magnet 1 and sliding magnet 2 slide, they can compress the elastic plate along the length direction of the elastic plate, so that the elastic plate undergoes elastic bending deformation, which can then drive the piezoelectric film attached to the surface of the elastic plate to bend and deform to generate electricity.
[0015] As a further improvement of the above technical solution, the piezoelectric films are divided into two groups; the two groups of piezoelectric films are connected in series and are attached to the two side surfaces of the elastic plate in a one-to-one correspondence.
[0016] The beneficial effect of the above technical solution is that two groups of piezoelectric films are attached to the two side surfaces of the elastic plate and connected in series, which can increase the output power of electric energy and improve the energy conversion efficiency.
[0017] As a further improvement of the above technical solution, the width direction of the elastic plate is arranged perpendicular to the top end surface of the base.
[0018] The beneficial effect of the above technical solution is that the elastic plate is arranged perpendicular to the top surface of the base in its width direction, so that the elastic plate can bend in a direction parallel to the top surface of the base, thereby avoiding spatial interference between the elastic plate and the base when bending.
[0019] As a further improvement of the above technical solution, the hinge assembly includes a hinge part 1 and a hinge part 2; the hinge part 1 includes a hinge shaft 1 and a shaft sleeve 1 rotatably sleeved on the hinge shaft 1; the hinge part 2 includes a hinge shaft 2 and a shaft sleeve 2 rotatably sleeved on the hinge shaft 2;
[0020] One end of the hinge shaft is vertically connected to the top of the sliding magnet; one end of the elastic plate in the length direction is fixed to the sleeve one; one end of the hinge shaft is vertically connected to the top of the sliding magnet two; the other end of the elastic plate in the length direction is fixed to the sleeve two.
[0021] As a further improvement of the above technical solution, the sliding magnet 1 and the sliding magnet 2 are both mass blocks with preset masses.
[0022] The beneficial effect of the above technical solution is that sliding magnet one and sliding magnet two act as mass blocks. Under large-amplitude excitation of the wind turbine generator set, the sliding sliding magnet one and sliding magnet two can produce a moment of inertia on the power generation beam. Under the coupling effect of nonlinear magnetic repulsion and moment of inertia, the strain of the power generation beam can be further increased, thereby generating a considerable output voltage.
[0023] As a further improvement of the above technical solution, the first slide groove and the second slide groove are vertically crossed to form a cross slide groove structure.
[0024] The beneficial effect of the above technical solution is that the cross-slide structure is more conducive to capturing multi-directional vibration energy.
[0025] As a further improvement of the above technical solution, the dimension of the sliding magnet 1 along the length direction of the slide groove 1 is greater than the width of the slide groove 2; the dimension of the sliding magnet 2 along the length direction of the slide groove 2 is greater than the width of the slide groove 1.
[0026] The beneficial effects of the above technical solution are: the size of sliding magnet one along the length direction of slide groove one is greater than the width of slide groove two, so that sliding magnet one can slide smoothly in slide groove one; the size of sliding magnet two along the length direction of slide groove two is greater than the width of slide groove one, so that sliding magnet one can slide smoothly in slide groove two; thereby avoiding the jamming and cross-slotting of sliding magnet one and sliding magnet two at the intersection of slide groove one and slide groove two.
[0027] As a further improvement of the above technical solution, the fixed magnet 1, the fixed magnet 2, the fixed magnet 3 and the fixed magnet 4 are permanent magnets with the same structure and magnetization strength; the sliding magnet 1 and the sliding magnet 2 are permanent magnets with the same structure and magnetization strength;
[0028] The end faces of the fixed magnet 1 and the sliding magnet 1 opposite to each other have the same magnetic poles to form a magnetic repulsion force; the end faces of the fixed magnet 2 and the sliding magnet 1 opposite to each other have the same magnetic poles to form a magnetic repulsion force; the end faces of the fixed magnet 3 and the sliding magnet 2 opposite to each other have the same magnetic poles to form a magnetic repulsion force; the end faces of the fixed magnet 4 and the sliding magnet 2 opposite to each other have the same magnetic poles to form a magnetic repulsion force.
[0029] The beneficial effects of the above technical solution are: a magnetic field distribution of the same strength is constructed at the ends of the slide groove 1 and the slide groove 2, thereby providing a balanced magnetic repulsion environment for the sliding magnet 1 and the sliding magnet 2; and further improving the adaptability to multi-directional vibration energy capture. At the same time, the sliding magnet 1 slides between the fixed magnet 1 and the fixed magnet 2 and both ends thereof are subjected to magnetic repulsion, and the sliding magnet 2 slides between the fixed magnet 3 and the fixed magnet 4 and both ends thereof are subjected to magnetic repulsion, so that the power generation beam is always in a compressed state in the length direction, thereby reducing the self-vibration frequency of the power generation beam.
[0030] As a further improvement of the above technical solution, the first slide groove and the second slide groove are both T-shaped grooves.
[0031] The beneficial effect of the above technical solution is that the T-shaped groove can effectively prevent the sliding magnet 1 and the sliding magnet 2 from falling out when sliding, thereby improving the stability of the device.
[0032] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a vibration energy capture device for a wind turbine generator set, which has the following advantages and beneficial effects:
[0033] 1. The present invention can realize multi-directional vibration energy collection of a wind turbine generator set with only one power generation beam. At the same time, the position of the power generation beam can be adaptively adjusted according to environmental excitation, which significantly reduces the complexity of the structure.
[0034] 2. The present invention introduces nonlinear magnetic force to provide a constant positive longitudinal pressure for the power generation beam, thereby reducing the natural frequency of the power generation beam, which is equivalent to reducing the stiffness of the power generation beam. At the same time, the nonlinear design of the device is realized, the output power of the energy capture device is further improved, the frequency response range is expanded, and the bandwidth advantage of nonlinear acquisition is maintained, so that the present invention can also achieve a better energy capture effect in the ultra-low frequency environment of the wind turbine.
[0035] 3. In the present invention, sliding magnet 1 and sliding magnet 2 not only provide magnetic force, but also act as mass blocks. Under large-amplitude excitation of the wind turbine generator set, the effect of sliding magnet 1 and sliding magnet 2 on the moment of inertia of the power generation beam can further increase the strain of the power generation beam. Under the coupling effect of nonlinear magnetic repulsion and moment of inertia, a considerable output voltage can be generated. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0037] Figure 1 A schematic diagram of the overall structure of a vibration energy capture device applied to a wind turbine generator set according to the present invention;
[0038] Figure 2 A schematic diagram of a partial structure of a vibration energy capture component of a vibration energy capture device applied to a wind turbine generator set according to the present invention;
[0039] In the figure: 1. base; 11. slide slot 1; 12. slide slot 2; 13. limit cover plate; 131. cross-shaped through hole; 14. fixing hole; 2. vibration energy capture component; 21. power generation beam; 211. elastic plate; 212. piezoelectric film; 22. fixed magnet 1; 23. fixed magnet 2; 24. fixed magnet 3; 25. fixed magnet 4; 26. sliding magnet 1; 27. sliding magnet 2; 3. wire; 4. hinge 1; 41. hinge shaft 1; 42. bushing 1; 5. hinge 2; 51. hinge shaft 2; 52. bushing 2. DETAILED DESCRIPTION
[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0041] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present invention.
[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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.
[0044] According to an embodiment of the present invention, Figure 1 and Figure 2 As shown, a vibration energy capture device applied to a wind turbine generator set includes: a base 1, a vibration energy capture component 2 and a conductor 3.
[0045] The base 1 is used to connect the wind turbine generator set to transmit vibration; the top surface of the base 1 is provided with a chute 11 and a chute 2 12; the chute 11 and the chute 2 12 are cross-arranged and connected;
[0046] The vibration energy capture assembly 2 includes a power generation beam 21, a fixed magnet 1 22, a fixed magnet 2 23, a fixed magnet 3 24, a fixed magnet 4 25, a sliding magnet 1 26 and a sliding magnet 2 27.
[0047] The power generation beam 21 is arranged corresponding to the top surface of the base 1; the sliding magnet 26 is hinged at one end of the power generation beam 21 and is slidably connected in the slide groove 11; the fixed magnet 22 and the fixed magnet 23 are fixed at both ends of the length direction in the slide groove 11 by colloid bonding in a one-to-one manner, so that the sliding magnet 26 can be driven to slide by the nonlinear magnetic repulsion force when the base 1 vibrates; the sliding magnet 27 is hinged at the other end of the power generation beam 21 and is slidably connected in the slide groove 2 12; the fixed magnet 3 24 and the fixed magnet 4 25 are fixed at both ends of the length direction in the slide groove 2 12 by colloid bonding in a one-to-one manner, so that the sliding magnet 2 27 can be driven to slide by the nonlinear magnetic repulsion force when the base 1 vibrates; the sliding magnet 1 26 and the sliding magnet 2 27 that slide under force jointly drive the power generation beam 21 to undergo bending strain to generate electricity.
[0048] The conductor 3 is electrically connected to the power generation beam 21 to transmit the captured electrical energy.
[0049] When a vibration energy capture device applied to a wind generator set of the present embodiment is used, the base 1 is installed on the horizontal working plane of the wind generator set. When the vibration excitation of the wind generator set in the direction parallel to the top surface of the base 1 acts on the base 1, the base 1 will be displaced. When the base 1 is displaced along the direction of the slide groove 11, the sliding magnet 1 26 located in the slide groove 11 will be relatively displaced, and the fixed magnet 1 22 or the fixed magnet 23 gradually approaches the sliding magnet 1 26. The magnitude of the nonlinear magnetic repulsion force is adjusted by changing the magnetic spacing to push the sliding magnet 1 26 to slide. The sliding sliding magnet 1 26 pushes the power generation beam 21 to deflect, thereby driving the sliding magnet 2 27 to slide in the slide groove 2 12. The nonlinear magnetic repulsion force is generated in the process of the sliding magnet 27 gradually approaching the fixed magnet 3 24 or the fixed magnet 4 25, and finally both ends of the power generation beam 21 are subjected to the nonlinear magnetic repulsion force and bend to generate electricity, thereby converting the vibration energy into electrical energy. The conductor 3 is used to transmit the electrical energy captured by the power generation beam 21. Similarly, when the base 1 is excited in other directions, the power generation beam 21 will also undergo buckling strain to convert the vibration energy of the wind turbine generator set into electrical energy. The vibration energy capture device of the present invention has a simple structure, and the cross-arranged slide slots 11 and 12 allow the power generation beam 21 to perform adaptive position adjustment according to the external environmental vibration excitation; the present invention introduces nonlinear magnetic force to provide a constant positive axial force for the power generation beam 21, thereby reducing the natural frequency of the power generation beam 21 and the stiffness of the aluminum beam, so that the power generation beam 21 will also have a large deformation in an ultra-low frequency environment; at the same time, the nonlinear design of the device is realized, the output power of the energy capture system is further improved, the frequency response range is expanded, and the bandwidth advantage of nonlinear acquisition is maintained, so that the vibration energy capture device of the present invention can also achieve a better energy capture effect in the ultra-low frequency, large amplitude and multi-directional vibration environment of the wind turbine generator set.
[0050] In some embodiments, the power generation beam 21 includes an elastic plate 211 and a piezoelectric film 212 attached to the surface of the elastic plate 211; the wire 3 electrically connects the piezoelectric film 212; both ends of the elastic plate 211 in the length direction are hinged to the sliding magnet 1 26 and the sliding magnet 2 27 through hinge components.
[0051] When sliding, the sliding magnet 1 26 and the sliding magnet 27 slide, they can compress the elastic plate 211 along the length direction of the elastic plate 211, so that the elastic plate 211 undergoes elastic bending deformation, thereby driving the piezoelectric film 212 attached to the surface of the elastic plate 211 to bend and deform to generate electricity.
[0052] In some embodiments, the piezoelectric films 212 are in two groups; the two groups of piezoelectric films 212 are connected in series and adhered to the two side surfaces of the elastic plate 211 in a one-to-one correspondence.
[0053] The two groups of piezoelectric films 212 are attached to the two side surfaces of the elastic plate 211 and connected in series, which can increase the output power of the electric energy and improve the energy conversion efficiency.
[0054] Specifically, the piezoelectric film 212 is a polyvinylidene fluoride piezoelectric film.
[0055] Specifically, the elastic plate 211 can be any one of an aluminum plate, a stainless steel plate, and a copper plate.
[0056] In some embodiments, the elastic plate 211 is an aluminum plate. Two groups of piezoelectric films 212 correspond to each other and are symmetrically attached to the largest surface of the two sides of the elastic plate 211 through epoxy resin conductive adhesive, one positive and one negative; the two groups of piezoelectric films 212 are connected in series, and the surface of the piezoelectric film 212 is electrically connected to one end of the wire 3.
[0057] In some embodiments, the width direction of the elastic plate 211 is arranged perpendicular to the top surface of the base 1 .
[0058] The elastic plate 211 is arranged perpendicular to the top surface of the base 1 in its width direction, so that the elastic plate 211 can be bent in a direction parallel to the top surface of the base 1, thereby avoiding spatial interference between the elastic plate 211 and the base 1 when the elastic plate 211 is bent.
[0059] In some embodiments, the hinge assembly includes a hinge part 1 4 and a hinge part 2 5; the hinge part 1 4 includes a hinge shaft 1 41 and a shaft sleeve 1 42 rotatably sleeved on the hinge shaft 1 41; the hinge part 2 5 includes a hinge shaft 2 51 and a shaft sleeve 2 52 rotatably sleeved on the hinge shaft 2 51;
[0060] One end of the hinge shaft 41 is vertically connected to the top of the sliding magnet 26; one end of the elastic plate 211 in the length direction is fixed to the shaft sleeve 42; one end of the hinge shaft 51 is vertically connected to the top of the sliding magnet 27; the other end of the elastic plate 211 in the length direction is fixed to the shaft sleeve 52.
[0061] Specifically, the power generation beam 21 is located between the shaft sleeve 1 42 and the shaft sleeve 2 52 , and the two ends of the power generation beam 21 are fixedly connected to the shaft sleeve 1 42 and the shaft sleeve 2 52 by bolts in a one-to-one correspondence.
[0062] Specifically, mounting holes are provided in the middle of the top of sliding magnet 1 26 and sliding magnet 2 27; one end of hinge shaft 1 41 is movably inserted into slide groove 11 and vertically inserted into the mounting hole of sliding magnet 1 26; one end of hinge shaft 2 51 is movably inserted into slide groove 2 12 and vertically inserted into the mounting hole of sliding magnet 2 27.
[0063] In some embodiments, both the sliding magnet 1 26 and the sliding magnet 2 27 are mass blocks with a preset mass.
[0064] Sliding magnet 1 26 and sliding magnet 2 27 act as mass blocks. Under large-amplitude excitation of the wind turbine generator set, the sliding sliding magnet 1 26 and sliding magnet 2 27 can produce a moment of inertia on the power generation beam 21. Under the coupling effect of nonlinear magnetic repulsion and moment of inertia, the strain of the power generation beam 21 can be further increased, thereby generating a considerable output voltage.
[0065] In some embodiments, the first slide groove 11 and the second slide groove 12 are vertically intersected to form a cross slide groove structure.
[0066] The cross-slide structure is more conducive to capturing multi-directional vibration energy.
[0067] In some embodiments, the dimension of the sliding magnet 26 along the length direction of the slide groove 11 is greater than the width of the slide groove 2 12 ; the dimension of the sliding magnet 2 27 along the length direction of the slide groove 2 12 is greater than the width of the slide groove 11 .
[0068] The dimension of sliding magnet 26 along the length direction of slide groove 11 is greater than the width of slide groove 2 12, so that sliding magnet 26 can slide smoothly only in slide groove 11; the dimension of sliding magnet 27 along the length direction of slide groove 2 12 is greater than the width of slide groove 11, so that sliding magnet 26 can slide smoothly only in slide groove 2 12; thereby avoiding the sliding magnet 26 and sliding magnet 2 27 from getting stuck and crossing the groove at the intersection of slide groove 11 and slide groove 2 12.
[0069] In some embodiments, the fixed magnet 1 22, the fixed magnet 23, the fixed magnet 3 24 and the fixed magnet 4 25 are permanent magnets with the same structure and magnetization strength; the sliding magnet 1 26 and the sliding magnet 2 27 are permanent magnets with the same structure and magnetization strength;
[0070] The opposite end faces of the fixed magnet 22 and the sliding magnet 26 are the same magnetic poles to form a magnetic repulsion force; the opposite end faces of the fixed magnet 23 and the sliding magnet 26 are the same magnetic poles to form a magnetic repulsion force; the opposite end faces of the fixed magnet 3 24 and the sliding magnet 2 27 are the same magnetic poles to form a magnetic repulsion force; the opposite end faces of the fixed magnet 4 25 and the sliding magnet 2 27 are the same magnetic poles to form a magnetic repulsion force.
[0071] The magnetic field distribution of the same strength is constructed at the ends of the slide groove 1 11 and the slide groove 2 12, thereby providing a balanced magnetic repulsion environment for the sliding magnet 1 26 and the sliding magnet 2 27, and further improving the adaptability to multi-directional vibration energy capture. At the same time, the sliding magnet 1 26 slides between the fixed magnet 1 22 and the fixed magnet 2 23 and both ends thereof are subjected to magnetic repulsion, and the sliding magnet 2 27 slides between the fixed magnet 3 24 and the fixed magnet 4 25 and both ends thereof are subjected to magnetic repulsion, so that the power generation beam 21 is always in a compressed state in the length direction, thereby reducing the self-vibration frequency of the power generation beam 21.
[0072] In some embodiments, the first slide groove 11 and the second slide groove 12 are both T-shaped grooves.
[0073] The T-shaped groove can effectively prevent the sliding magnet 1 26 and the sliding magnet 2 27 from falling out when sliding, thereby improving the stability of the device.
[0074] Specifically, the base 1 includes a cross-shaped frame body and a limit cover plate 13, the top surface of the cross-shaped frame body is provided with a cross-shaped groove; the limit cover plate 13 is provided with a cross-shaped through hole 131; the limit cover plate 13 is fixed to the top surface of the cross-shaped frame body by screws, and the cross-shaped through hole 131 of the limit cover plate 13 corresponds to the middle of the notch of the cross-shaped groove; the hole width of the cross-shaped through hole 131 is smaller than the groove width of the cross-shaped groove, and the cross-shaped through hole 131 and the cross-shaped groove together form a T-shaped groove structure, and construct a slide groove 11 and a slide groove 2 12. The cross-shaped through hole 131 can avoid the hinge 1 4 and the hinge 2 5, so as to avoid the hinge 1 4 and the hinge 2 5 from interfering with the movement of the limit cover plate 13.
[0075] Specifically, the four ends of the cross-shaped frame are provided with fixing holes 14 for installing bolts, and the fixing holes 14 are used to connect with the wind turbine generator set.
[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.
Claims
1. A vibration energy capture device for a wind turbine generator set, characterized in that: include: A base (1) is used to connect a wind turbine generator set to transmit vibration; a first slide groove (11) and a second slide groove (12) are provided on the top surface of the base (1); the first slide groove (11) and the second slide groove (12) are arranged crosswise and connected; A vibration energy capture component (2), the vibration energy capture component (2) comprising a power generation beam (21), a fixed magnet 1 (22), a fixed magnet 2 (23), a fixed magnet 3 (24), a fixed magnet 4 (25), a sliding magnet 1 (26) and a sliding magnet 2 (27); The power generation beam (21) is arranged corresponding to the top surface of the base (1); the sliding magnet 1 (26) is hinged at one end of the power generation beam (21) and is slidably connected to the slide groove 1 (11); the fixed magnet 1 (22) and the fixed magnet 2 (23) are installed at both ends of the length direction of the slide groove 1 (11) in a one-to-one correspondence, so as to drive the sliding magnet 1 (26) to slide through the nonlinear magnetic repulsion force when the base (1) vibrates; the sliding magnet 2 (27) is hinged at the The other end of the power generation beam (21) is slidably connected to the second slide groove (12); the third fixed magnet (24) and the fourth fixed magnet (25) are mounted in a one-to-one correspondence at both ends of the length direction of the second slide groove (12) to drive the second sliding magnet (27) to slide through the nonlinear magnetic repulsion when the base (1) vibrates; the first sliding magnet (26) and the second sliding magnet (27) that slide under force jointly drive the power generation beam (21) to generate buckling strain to generate electricity; A conductor (3) electrically connects the power generation beam (21) to transmit the captured electrical energy.
2. A vibration energy capture device for a wind turbine generator set according to claim 1, characterized in that: The power generation beam (21) comprises an elastic plate (211) and a piezoelectric film (212) attached to the surface of the elastic plate (211); the wire (3) is electrically connected to the piezoelectric film (212); both ends of the elastic plate (211) in the length direction are hinged to the sliding magnet 1 (26) and the sliding magnet 2 (27) in a one-to-one correspondence through hinge components.
3. A vibration energy capture device for a wind turbine generator set according to claim 2, characterized in that: The piezoelectric films (212) are in two groups; the two groups of piezoelectric films (212) are connected in series and are attached to the two side surfaces of the elastic plate (211) in a one-to-one correspondence.
4. A vibration energy capture device for a wind turbine generator set according to claim 2, characterized in that: The width direction of the elastic plate (211) is arranged perpendicular to the top surface of the base (1).
5. A vibration energy capture device for a wind turbine generator set according to claim 4, characterized in that: The hinge assembly comprises a hinge part 1 (4) and a hinge part 2 (5); the hinge part 1 (4) comprises a hinge shaft 1 (41) and a shaft sleeve 1 (42) rotatably sleeved on the hinge shaft 1 (41); the hinge part 2 (5) comprises a hinge shaft 2 (51) and a shaft sleeve 2 (52) rotatably sleeved on the hinge shaft 2 (51); One end of the hinge shaft one (41) is vertically connected to the top of the sliding magnet one (26); one end of the elastic plate (211) in the length direction is fixed to the shaft sleeve one (42); one end of the hinge shaft two (51) is vertically connected to the top of the sliding magnet two (27); the other end of the elastic plate (211) in the length direction is fixed to the shaft sleeve two (52).
6. The vibration energy capture device for a wind turbine generator set according to claim 1, characterized in that: The sliding magnet 1 (26) and the sliding magnet 2 (27) are both mass blocks with preset masses.
7. A vibration energy capture device for a wind turbine generator set according to claim 1, characterized in that: The first slide groove (11) and the second slide groove (12) are vertically intersected to form a cross slide groove structure.
8. A vibration energy capture device for a wind turbine generator set according to claim 7, characterized in that: The dimension of the sliding magnet 1 (26) along the length direction of the slide groove 1 (11) is greater than the width of the slide groove 2 (12); the dimension of the sliding magnet 2 (27) along the length direction of the slide groove 2 (12) is greater than the width of the slide groove 1 (11).
9. A vibration energy capture device for a wind turbine generator set according to claim 1, characterized in that: The fixed magnet one (22), the fixed magnet two (23), the fixed magnet three (24) and the fixed magnet four (25) are permanent magnets with the same structure and magnetization strength; the sliding magnet one (26) and the sliding magnet two (27) are permanent magnets with the same structure and magnetization strength; The end faces of the fixed magnet 1 (22) and the sliding magnet 1 (26) opposite to each other have the same magnetic poles to form a magnetic repulsion force; the end faces of the fixed magnet 2 (23) and the sliding magnet 1 (26) opposite to each other have the same magnetic poles to form a magnetic repulsion force; the end faces of the fixed magnet 3 (24) and the sliding magnet 2 (27) opposite to each other have the same magnetic poles to form a magnetic repulsion force; the end faces of the fixed magnet 4 (25) and the sliding magnet 2 (27) opposite to each other have the same magnetic poles to form a magnetic repulsion force.
10. A vibration energy capture device for a wind turbine generator set according to claim 1, characterized in that: The first slide groove (11) and the second slide groove (12) are both T-shaped grooves.