CN112701871A - Microminiature electromagnetic type wind power generation set - Google Patents
Microminiature electromagnetic type wind power generation set Download PDFInfo
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- CN112701871A CN112701871A CN202011640450.9A CN202011640450A CN112701871A CN 112701871 A CN112701871 A CN 112701871A CN 202011640450 A CN202011640450 A CN 202011640450A CN 112701871 A CN112701871 A CN 112701871A
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- bottom plate
- electromagnetic
- fixedly connected
- wind power
- power generation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D5/00—Other wind motors
- F03D5/06—Other wind motors the wind-engaging parts swinging to-and-fro and not rotating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
Abstract
The application relates to a microminiature electromagnetic type wind power generation device which comprises a base, a stainless steel spring and a blunt body. The blunt body comprises a closed accommodating space, and an electromagnetic electromechanical conversion unit is arranged in the accommodating space. One end of the stainless steel spring is fixedly connected with the base, and the other end of the stainless steel spring is fixedly connected with the blunt body. When wind blows over the bluff body, the bluff body is caused to vibrate on the stainless steel spring, and the conversion from wind energy to vibration energy is realized. The enclosed space is arranged in the blunt body, and the electromagnetic electromechanical conversion unit is arranged in the enclosed space, so that when the blunt body drives the electromagnetic electromechanical conversion unit to vibrate, the electromagnetic electromechanical conversion unit can convert vibration energy into electric energy. Because the electromagnetic electromechanical conversion unit is positioned in the closed space, the electromagnetic electromechanical conversion unit is completely isolated from the external environment and cannot be eroded by the external air and liquid, and the whole microminiature electromagnetic wind power generation device can stably work in the field for a long time.
Description
Technical Field
The application relates to the technical field of Internet of things and wind power generation, in particular to a microminiature electromagnetic type wind power generation device.
Background
Wind energy is a clean energy widely existing in nature, and a microminiature electromagnetic type wind power generation device is an ideal power supply for driving a wireless sensing network node.
The wind-induced vibration phenomenon refers to a phenomenon that a solid structure vibrates when being subjected to wind. The wind-induced vibration phenomenon is frequently applied to the field of wind power generation of a minute scale in recent years. The wind-induced vibration-based micro electromagnetic wind power generation device converts wind energy into vibration energy of a micro structure by utilizing a wind-induced vibration phenomenon, and further converts the vibration energy of the micro structure into electric energy by utilizing electromechanical conversion principles such as piezoelectric effect, electrostatic induction, electromagnetic induction or friction power generation.
The traditional micro electromagnetic wind power generation device generally has the advantages that a flexible film is arranged, wind-induced vibration is generated under the action of airflow through the flexible film, and then electric output is generated through a piezoelectric layer in the film or through friction caused by vibration of a diaphragm.
However, the conventional micro-miniature electromagnetic wind power generation device needs to expose the flexible film to the external environment, so that the wind energy can be converted into electric energy, the flexible film is corroded by moisture (including acid and alkali liquid) in the environment, and dust in the air may adhere to the flexible film to change the dynamic performance of the film, so that the long-term stability and reliability of the wind power generation device cannot meet the requirement of long-term stable operation in the field.
Disclosure of Invention
Therefore, it is necessary to provide a micro-miniature electromagnetic wind power generator suitable for long-term operation in a field environment, in order to solve the problem that the conventional micro-miniature electromagnetic wind power generator cannot stably operate in the field for a long time.
The present application provides a microminiature electromagnetic wind power generation device, including:
a base;
the blunt body comprises a closed accommodating space, and an electromagnetic electromechanical conversion unit is arranged in the accommodating space and is used for converting vibration energy into electric energy;
the stainless steel spring is arranged between the base and the blunt body and is used for cooperating with the blunt body to convert wind energy into vibration energy; one end of the stainless steel spring is fixedly connected with the base, and the other end of the stainless steel spring is fixedly connected with the blunt body.
Further, the blunt body is a shell with a closed top and an open bottom, and comprises an upper wall plate, a plurality of side wall plates and a bottom plate; the upper wall plate, the plurality of side wall plates and the bottom plate are jointly surrounded to form the accommodating space; the stainless steel spring is fixedly connected with the bottom plate, so that the stainless steel spring is integrally and fixedly connected with the blunt body.
Further, the blunt body is a shell with a closed top and an open bottom; the blunt body comprises an upper wall plate, a plurality of side wall plates and a bottom plate; the upper wall plate and the plurality of side wall plates are enclosed to form a shell with a closed top and an open bottom; the upper wall plate, the bottom plate and the plurality of side wall plates surround to form the closed accommodating space; the stainless steel spring is fixedly connected with the bottom plate, so that the spring is integrally and fixedly connected with the blunt body.
Further, the electromagnetic electromechanical conversion unit includes:
the electromagnetic vibration energy collectors are stacked and fixedly arranged on the surface of the bottom plate and are used for collecting vibration energy in different directions;
each electromagnetic vibration energy collector collects vibration energy in one direction.
Further, the electromagnetic type vibration energy collector includes:
the outer frame comprises a top cover, a left bottom plate, a right bottom plate and a bottom plate; the top cover, the left bottom plate, the right bottom plate and the bottom plate are surrounded to form a rectangular frame; the top cover comprises a plurality of top cover chutes and the bottom plate comprises a plurality of bottom plate chutes;
further, the outer frame further includes:
one end of each coil support is embedded into the left bottom plate and fixedly connected with the left bottom plate through a screw, and the other end of each coil support is embedded into the right bottom plate and fixedly connected with the right bottom plate through a screw;
the coil arrays are embedded in the coil support; the number of the coil supports is equal to that of the coil arrays; each coil array is connected by M rectangular coils in sequence, and M is a positive integer greater than 2.
Further, the electromagnetic vibration energy collector also comprises an inner frame;
the inner frame comprises:
the permanent magnet array comprises a plurality of permanent magnet arrays, wherein each permanent magnet array is formed by sequentially connecting N rectangular permanent magnets, and N is a positive integer greater than 1;
each permanent magnet array is embedded in the inner surface of the upper frame, and a plurality of upper frame sliding grooves are formed in the outer surface of the upper frame;
each permanent magnet array is embedded in the inner surface of the lower frame, and a plurality of lower frame sliding grooves are formed in the outer surface of the lower frame.
Further, the electromagnetic vibration energy collector further comprises:
one end of the first spring is fixedly connected with the left bottom plate, and the other end of the first spring is fixedly connected with the lower frame;
one end of the second spring is fixedly connected with the right bottom plate, and the other end of the second spring is fixedly connected with the lower frame;
the first idler wheel is arranged in a space formed by buckling the top cover sliding groove and the upper frame sliding groove; the diameter of the first roller is larger than the sum of the depth of the top cover sliding groove and the depth of the upper frame sliding groove;
the first roller is arranged in a space formed by buckling the bottom plate sliding groove and the lower frame sliding groove; the diameter of the second roller is larger than the sum of the depth of the bottom plate sliding groove and the depth of the lower frame sliding groove.
Further, the permanent magnet array and the coil array are arranged in parallel and at intervals between the top cover and the bottom plate.
Further, the surfaces of the base and the blunt body are coated with a corrosion-resistant coating.
The application relates to a microminiature electromagnetic type wind power generation device which comprises a base, a stainless steel spring and a blunt body. The blunt body comprises a closed accommodating space, and an electromagnetic electromechanical conversion unit is arranged in the accommodating space. One end of the stainless steel spring is fixedly connected with the base, and the other end of the stainless steel spring is fixedly connected with the blunt body. When wind blows over the bluff body, the bluff body is caused to vibrate on the stainless steel spring, and the conversion from wind energy to vibration energy is realized. The enclosed space is arranged in the blunt body, and the electromagnetic electromechanical conversion unit is arranged in the enclosed space, so that when the blunt body drives the electromagnetic electromechanical conversion unit to vibrate, the electromagnetic electromechanical conversion unit can convert vibration energy into electric energy. Because the electromagnetic electromechanical conversion unit is positioned in the closed space, the electromagnetic electromechanical conversion unit is completely isolated from the external environment and cannot be eroded by the external air and liquid, and the whole microminiature electromagnetic wind power generation device can stably work in the field for a long time.
Drawings
Fig. 1 is a schematic structural diagram of a micro-miniature electromagnetic wind power generation device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a blunt body in another embodiment of a micro-miniature electromagnetic wind turbine generator according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an electromagnetic vibration energy collector in a micro-miniature electromagnetic wind turbine provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a top cover, a left bottom plate, a right bottom plate, and a bottom plate of an electromagnetic vibration energy collector in a micro-miniature electromagnetic wind power generation apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of components of an electromagnetic vibration energy collector in a micro-miniature electromagnetic wind power generation device according to an embodiment of the present disclosure, except for a top cover, a left bottom plate, a right bottom plate, and a bottom plate;
fig. 6 is a schematic structural diagram of a coil array and a permanent magnet array in a micro-miniature electromagnetic wind power generation apparatus according to an embodiment of the present disclosure;
fig. 7 is a top view of a micro-miniature electromagnetic wind turbine generator according to an embodiment of the present disclosure, in which a coil array and a permanent magnet array are arranged in parallel and at an interval;
fig. 8 is a schematic structural diagram of several stainless steel springs with different structural forms in a micro-miniature electromagnetic wind power generation device according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a blunt body in several different structural forms in a micro-miniature electromagnetic wind power generation device according to an embodiment of the present application.
Reference numerals:
10-a base; 20-bluff body; 30-a containment space; 40-electromagnetic electromechanical conversion unit; 400-electromagnetic vibration energy collector; 410-an outer frame; 411-a top cover; 412-left bottom plate; 413-right bottom plate; 414-a backplane; 415-a top cover chute; 416-a floor chute; 417-a coil support; 418-coil array; 419-rectangular coil; 420-an inner frame; 421-an array of permanent magnets; 422-upper frame; 423-upper frame runner; 424-lower frame; 425-lower frame runner; 426-rectangular permanent magnets; 431-a first spring; 432-a second spring; 433 — a first roller; 434-a second roller; 210-an upper wall plate; 220-side wall panels; 230-a backplane; 50-stainless steel spring
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The application provides a micro-miniature electromagnetic wind power generation device. It should be noted that the micro-miniature electromagnetic wind power generation device provided by the present application is applied to outdoor scenes in any season.
As shown in fig. 1, in an embodiment of the present application, the micro-miniature electromagnetic wind power generator includes a base 10, a blunt body 20, and a stainless steel spring 50. The stainless spring 50 is disposed between the base 10 and the blunt body 20. One end of the stainless steel spring 50 is fixedly connected with the base 10, and the other end is fixedly connected with the blunt body 20. The blunt body 20 includes a closed receiving space 30. An electromagnetic electromechanical conversion unit 40 is disposed in the accommodating space 30, and the electromagnetic electromechanical conversion unit 40 is configured to convert vibration energy into electrical energy. The stainless steel spring 50 is used for cooperating with the blunt body 20 to convert wind energy into vibration energy.
Specifically, the blunt body 20 may be a polygonal housing. The outer surfaces of the blunt body 20 and the base 10 are not provided with pits or concave portions, which can avoid the surfaces of the base 10 and the blunt body 20 exposed in the air from having pits or concave portions, and avoid water accumulation and dust accumulation. Alternatively, the top surfaces of the blunt body 20 and the base 10 may be flat or convex.
When wind blows over the blunt body 20, the blunt body 20 is subjected to wind load, wind-induced vibration occurs on the stainless steel spring 50 by the blunt body 20, and the electromagnetic electromechanical conversion unit 40 vibrates along with the blunt body 20 to convert wind energy into vibration energy. The electromagnetic electromechanical conversion unit 40 can further convert the vibration energy into electric energy to supply power to the wireless sensing node and the like.
In this embodiment, the micro-miniature electromagnetic wind power generator is composed of a base 10, a stainless spring 50, and a blunt body 20. The blunt body 20 includes a closed receiving space 30, and an electromagnetic type electromechanical conversion unit 40 is disposed in the receiving space 30. One end of the stainless steel spring 50 is fixedly connected with the base 10, and the other end is fixedly connected with the blunt body 20. When wind blows through the bluff body 20, the bluff body 20 is caused to vibrate, and the conversion of wind energy into vibration energy is realized. Through setting up bluff body 20 for when wind blows bluff body 20, bluff body 20 vibrates on stainless steel spring, realizes the conversion of wind energy to vibrational energy. By providing a closed accommodating space 30 in the blunt body 20 and providing the electromagnetic electromechanical conversion unit 40 in the closed accommodating space 30, the electromagnetic electromechanical conversion unit 40 can convert vibration energy into electrical energy when the blunt body 20 drives the electromagnetic electromechanical conversion unit 40 to vibrate. Because the electromagnetic electromechanical conversion unit 40 is located in the closed accommodating space 30, the electromagnetic electromechanical conversion unit 40 is completely isolated from the external environment and cannot be corroded by the outside air and liquid, and the whole miniature electromagnetic wind power generation device can stably work in the field for a long time.
As shown in fig. 1, in an embodiment of the present application, the blunt body includes an upper wall plate 210, a plurality of side wall plates 220, and a bottom plate 230. The upper wall plate 210, the plurality of side wall plates 220 and the bottom plate 230 together surround the receiving space 30. The stainless steel spring 50 is fixedly connected with the bottom plate, so that the stainless steel spring 50 is integrally and fixedly connected with the blunt body 20.
Specifically, the stainless steel spring 50 acts as a resilient member for wind-induced vibrations, and when wind blows through the blunting body 20, the wind load causes the stainless steel spring 50 to deform, thereby causing the blunting body 20 to vibrate on the stainless steel spring 50. Although the accommodating space 30 is closed, the inside thereof must be vacuum, and in order to reduce the processing cost, the inside of the accommodating space 30 may be air of normal pressure.
In this embodiment, the blunt body 20 may form a closed accommodating space 30 therein, and may be fixedly connected to the stainless steel spring 50.
In another embodiment of the present application, the blunt body 20 may have other structural shapes, as shown in fig. 2. In the embodiment shown in fig. 2, the blunt body 20 is a closed-top and open-bottom housing. The blunt body 20 includes an upper wall plate 210, a plurality of side wall plates 220, and a bottom plate 230. The upper wall panel 210 and the plurality of side wall panels 220 enclose a closed top and open bottom housing. The upper wall panel 210, the bottom panel 230 and the plurality of side wall panels 220 surround to form the closed receiving space 30. The stainless steel spring 50 is fixedly connected with the bottom plate 230, so that the stainless steel spring 50 is integrally and fixedly connected with the blunt body 20.
Specifically, the bottom of the blunt body 20 is open so that the stainless steel spring 50 may extend into the blunt body 20 and be fixedly coupled to the bottom plate 230. As shown in fig. 1, in an embodiment of the present application, the electromagnetic electromechanical conversion unit 40 includes a plurality of electromagnetic vibration energy collectors 400. The plurality of electromagnetic vibration energy collectors 400 are stacked and fixedly disposed on the surface of the bottom plate 230. The electromagnetic vibration energy collector 400 is used for collecting vibration energy in different directions. Each electromagnetic vibration energy harvester 400 harvests vibration energy in one direction.
Specifically, as shown in fig. 1, two electromagnetic vibration energy collectors 400 in fig. 1 are stacked and disposed inside the accommodating space 30. As shown in fig. 3, the electromagnetic vibration energy harvester 400 has a rectangular parallelepiped shape. The directions of the two electromagnetic vibration energy collectors 400 for collecting vibration energy are both the length directions of the cuboids (the length directions are the directions of the longest sides of the cuboids). It is understood that the directions of collecting vibration energy of the two electromagnetic vibration energy collectors 400 are perpendicular to each other. Hereinafter, if the term "lengthwise direction" is referred to, it is uniformly meant to refer to the direction of the longest side of an object or structure.
In this embodiment, the plurality of electromagnetic vibration energy collectors 400 stacked in a stacked manner are arranged, so that the vibration energy from different directions can be collected, and the power generation efficiency is indirectly improved.
In another embodiment of the present application, the electromagnetic electromechanical conversion unit 40 includes only one electromagnetic vibration energy harvester 400. The electromagnetic vibration energy collector 400 can collect vibration energy in a plurality of directions at the same time.
As shown in fig. 3 and 4, in an embodiment of the present application, the electromagnetic vibration energy harvester 400 includes an outer frame 410. The outer frame 410 includes a top cover 411, a left bottom plate 412, a right bottom plate 413, and a bottom plate 414. The top cover 411, the left bottom plate 412, the right bottom plate 413 and the bottom plate 414 surround to form a rectangular parallelepiped frame. The top cover 411 includes a plurality of top cover runners 415. The floor 414 includes a plurality of floor runners 416.
Specifically, when the electromagnetic type vibration energy harvester 400 vibrates along with the blunt body 20, the external frame 410 is disposed to protect other component structures disposed inside the external frame 410 from being damaged.
As shown in fig. 3 and 5, in an embodiment of the present application, the outer frame 410 includes a plurality of coil supports 417 and a plurality of coil arrays 418. Each coil array 418 is embedded in the coil support 417. The number of the coil supports 417 is equal to the number of the coil arrays 418. One end of the coil support 417 is embedded in the left base plate 412 and is fixedly connected to the left base plate 412 by a screw. The other end of the coil support 417 is embedded in the right base plate 413, and is fixedly connected to the right base plate 413 by a screw. Each coil array 418 is connected in series by M rectangular coils 419, M being a positive integer greater than 2.
Specifically, the coil array 418 may be made of a material having excellent electrical conductivity, such as copper. The coil support 417 is provided with a groove, and the coil array 418 can be embedded in the groove, so that the coil support 417 and the coil array 418 can be spliced into a whole, and the whole is firm and stable. The coil array 418 may be plate-shaped. One end of the coil support 417 is embedded in the left base plate 412 and is fixedly connected to the left base plate 412 by a screw. The other end of the coil support 417 is embedded in the right base plate 413, and is fixedly connected to the right base plate 413 by a screw.
Alternatively, as shown in fig. 6, M rectangular coils 419 are equal in size and are connected in series in the longitudinal direction to constitute one coil array 418.
In this embodiment, the outer frame 410 includes the coil support 417 and the coil array 418, and the coil support 417 is connected to the left bottom plate 412 and the right bottom plate 413, so that the entire outer frame 410 forms a firm structural whole.
As shown in fig. 3 and 5, in an embodiment of the present application, the electromagnetic vibration energy harvester 400 further includes an inner frame 420. The inner frame 420 includes permanent magnet arrays 421, an upper frame 422, and a lower frame 424. Each permanent magnet array 421 is embedded in the inner surface of the upper frame 422. The outer surface of the upper frame 422 is provided with a plurality of upper frame sliding grooves 423. Each permanent magnet array 421 is embedded in the inner surface of the lower frame 424. The outer surface of the lower frame 424 is provided with a plurality of lower frame runners 425. Each permanent magnet array 421 is connected in series by N rectangular permanent magnets 426, N being a positive integer greater than 1, for example, N-M-1 or N-M may be selected.
Specifically, the permanent magnet array 421 may be made of a material with excellent magnetic properties, such as neodymium iron boron. The cross section of the upper frame 422 may be an elongated structure. The cross-section of the lower frame 424 may be a "zig-zag" structure.
As shown in fig. 6, N rectangular permanent magnets 426 are sequentially connected in the longitudinal direction, i.e., the direction of the longest side of the upper frame 422 and the lower frame 424, to form one permanent magnet array 421. Alternatively, the N rectangular permanent magnets 426 have the same size and are sequentially connected in the length direction to form a permanent magnet array 421.
As shown in fig. 6, in one embodiment of the present application, one rectangular permanent magnet 426 has an S pole on one side and an N pole on the other side. In one permanent magnet array 421, the S-poles and N-poles of rectangular permanent magnets are alternately arranged on the same surface.
Further, the length of the single rectangular permanent magnet 426 in the length direction may be equal to the length of the single rectangular coil 419 in the length direction.
In this embodiment, when the electromagnetic vibration energy harvester 400 vibrates along with the blunt body 20, the permanent magnet arrays 421 disposed inside the frame can be protected from being damaged by the arrangement of the upper frame 422 and the lower frame 424.
As shown in fig. 3 and 5, in an embodiment of the present application, the electromagnetic vibration energy harvester 400 further includes at least one first spring 431, at least one second spring 432, at least one first roller 433, and at least one second roller 434.
One end of the first spring 431 is fixedly connected with the left bottom plate 412. The other end of the first spring 431 is fixedly connected with the lower frame 424. One end of the second spring 432 is fixedly connected to the right bottom plate 413. The other end of the second spring 432 is fixedly connected to the lower frame 424. The first roller 433 is disposed in a space formed by the top cover sliding groove 415 and the upper frame sliding groove 423. The second roller 434 is disposed in a space formed by the bottom plate sliding groove 416 and the lower frame sliding groove 425.
In order to prevent the outer frame 410 and the inner frame 420 from being in direct contact, the diameter of the first roller 433 is larger than the sum of the depth of the top cover slide groove 415 and the depth of the upper frame slide groove 423. The diameter of the second roller 434 is greater than the sum of the depth of the bottom plate slide groove 416 and the depth of the lower frame slide groove 425.
Specifically, the first spring 431 and the second spring 432 are present in pairs, and the number is not limited. As shown in fig. 3, there are two first springs 431 and two second springs 432, and an inner frame 420 is connected to the outer frame 410 by one first spring 431 and one second spring 432. Of course, an inner frame 420 may be connected to the outer frame 410 by any number of first springs 431 and second springs 432, but the number of the first springs 431 and the number of the second springs 432 are equal.
Optionally, the first spring 431 is welded between the left base plate 412 and the lower frame 424. The second spring 432 is welded between the right base plate 413 and the lower frame 424.
Alternatively, the first spring 431 and the second spring 432 may be preset to a specific pressure or tension. The first spring 431 and the second spring 432 are arranged in such a way that the first spring 431 and the second spring 432 can bear both tension and compression. When wind blows on the blunt body 20, the micro-miniature electromagnetic wind power generation device vibrates linearly as a whole. The electromagnetic vibration energy collector 400 as a whole forms a resonant structure having its own natural frequency and is not changed by the change of the external vibration frequency.
The arrangement of the first spring 431 and the second spring 432 can also prevent the inner frame 420 from directly contacting the outer frame 410 when the electromagnetic vibration energy harvester 400 vibrates, so as to avoid collision between the inner frame 420 and the outer frame 410 and prevent energy loss caused by collision.
The first and second rollers 433 and 434 function to allow relative movement between the inner frame 420 and the outer frame 410, and specifically, between the permanent magnet array 421 and the coil array 418.
Since the diameter of the first roller 433 is greater than the sum of the depth of the top cover slide groove 415 and the depth of the upper frame slide groove 423 and the diameter of the second roller 434 is greater than the sum of the depth of the bottom plate slide groove 416 and the depth of the lower frame slide groove 425. It can be understood that the first roller 433 is partially inserted into the top cover slide groove 415, partially inserted into the upper frame slide groove 423, and partially exposed. Similarly, the second roller 434 is partially inserted into the bottom plate sliding groove 416, partially inserted into the lower frame sliding groove 425, and partially exposed, so that the outer frame 410 and the inner frame 420 do not directly contact each other. Thus, when the electromagnetic vibration energy collector 400 vibrates, the first roller 433 can freely roll between the top cover sliding groove 415 and the upper frame sliding groove 423, so that relative movement between the permanent magnet array 421 and the coil array 418 is easier to occur. The second roller 434 has the same structure and will not be described in detail.
Specifically, when the blunt body 20 is subjected to a wind load, wind-induced vibration occurs on the stainless steel spring 50 by the blunt body 20, and the electromagnetic vibration energy harvester 400 inside the electromagnetic electromechanical conversion unit 40 vibrates along with the blunt body 20, so that relative motion occurs between the permanent magnet array 421 and the coil array 418 of the electromagnetic vibration energy harvester 400, and accordingly, magnetic flux passing through the coil array 418 changes, induced electromotive force is generated at two ends of the coil array 418, and power can be supplied to the wireless sensing node and the like by using the potential difference.
In this embodiment, when the blunt body 20 is subjected to wind load, the first spring 431 and the second spring 432 are provided, so that the electromagnetic type vibration energy harvester 400 can form a resonant structure, has its own natural frequency, and is not changed by the change of external vibration frequency. By arranging the first roller 433 and the second roller 434, relative motion can be generated between the permanent magnet array 421 and the coil array 418, so that magnetic flux passing through the coil array 418 can be changed, induced electromotive force can be generated at two ends of the coil array 418, and power can be supplied to a wireless sensing node and the like by using the potential difference.
As shown in fig. 5 and 7, in an embodiment of the present application, the permanent magnet array 421 and the coil array 418 are arranged in parallel and spaced between the top cover 411 and the bottom plate 414.
Specifically, for example, the electromagnetic vibration energy harvester 400 in fig. 5 is composed of 3 permanent magnet arrays 421 and 2 coil arrays 418, and the specific structural form is permanent magnet array 421-coil array 418-permanent magnet array 421. This spacing is in a manner similar to that of a sandwich biscuit.
As shown in fig. 7, optionally, in two adjacent spaced permanent magnet arrays 421, in the same rectangular permanent magnet 426 setting position, there are two adjacent rectangular permanent magnets 426, and the N pole of one rectangular permanent magnet 426 is set opposite to the S pole of the other rectangular permanent magnet 426.
In this embodiment, the permanent magnet arrays 421 and the coil arrays 418 are arranged in parallel and at intervals, so that each permanent magnet array 421 can move relative to one coil array 418, the power generation efficiency is improved, and the permanent magnet arrays 421 or the coil arrays 418 which are not utilized do not exist.
In an embodiment of the present application, the natural frequency of the entire microminiature electromagnetic wind turbine generator and the natural frequency of the electromagnetic electromechanical conversion unit 40 satisfy the following formula 1;
wherein f is10The natural frequency of the whole micro electromagnetic wind power generation device. f. of20Is the natural frequency of the electromagnetic electromechanical conversion unit 40. k is a radical of1Is the stiffness of the stainless steel spring 50. m is1Is equivalent mass of a micro electromagnetic wind power generation device. k is a radical of2Is the sum of the stiffnesses of all the first and second springs 431, 432. m is2The mass of the inner frame 420.
Specifically, the stiffness of the stainless steel spring 50 may be pre-designed or measured, and is a known quantity. The equivalent mass of the micro electromagnetic wind power generation device can be calculated in advance by a model in a mathematical modeling mode and is also a known quantity. The stiffness of all the first and second springs 431 and 432, respectively, may be measured in advance and is a known quantity. The mass of the inner frame 420 is the sum of the masses of the permanent magnet array 421, the upper frame 422, and the lower frame 424, and may be designed or measured in advance, and is also a known quantity.
Therefore, through the limitation of the formula 1, a resonance relationship occurs between the relative motion between the permanent magnet array 421 and the coil array 418 and the motion of the blunt body 20 during the wind-induced vibration, so that the energy conversion efficiency of the micro-miniature electromagnetic wind power generation device is improved.
In other words, when the natural frequency of the entire micro-miniature electromagnetic wind turbine generator is approximately equal to the natural frequency of the electromagnetic electromechanical conversion unit 40 (the specific limitation used herein is shown in formula 1), resonance occurs, and it can be considered that the relative motion between the permanent magnet array 421 and the coil array 418 is maximized, and the conversion efficiency of the vibration energy into the electric energy is maximized.
In this embodiment, by setting the natural frequency of the entire micro-miniature electromagnetic wind turbine generator and the natural frequency of the electromagnetic electromechanical conversion unit 40 to satisfy formula 1, the relative movement between the permanent magnet array 421 and the coil array 418 is maximized, thereby maximizing the conversion efficiency of the vibration energy of the entire micro-miniature electromagnetic wind turbine generator into electric energy.
In an embodiment of the present application, the surfaces of the base 10 and the blunt body 20 are coated with a corrosion-resistant coating.
Specifically, the surfaces of the base 10 and the blunt body 20 may be coated with a corrosion-resistant coating to prevent corrosion by acid and alkali liquids in the environment during long-term field work.
Alternatively, the base 10 can be made of a material with good corrosion resistance, high and low temperature resistance, good mechanical properties, and chemical stability without being coated with a corrosion-resistant coating, such as stainless steel. Similarly, the casing of the blunt body 20 may be made of a material having light weight, good corrosion resistance and stable chemical properties, such as glass fiber reinforced plastic or plastic, without being coated with a corrosion-resistant coating. In this way, the cost of the coating can be saved.
The top cover 411, the bottom plate 414, the left bottom plate 412 and the right bottom plate 413 can be made of light materials with good mechanical properties. Most importantly, such a material requires no magnetic force to be applied to the permanent magnet array 421, and thus does not affect the relative motion between the coil array 418 and the permanent magnet array 421 in the electromagnetic vibration energy harvester 400. Alternatively, the top cover 411, the bottom plate 414, the left bottom plate 412 and the right bottom plate 413 may be made of aluminum or an aluminum alloy. The surfaces of the base 10 and the blunt body 20 may be subjected to surface treatment for hydrophobic property, high temperature resistance and low temperature resistance in advance, thereby further improving the adaptability to the field environment.
In addition, as shown in fig. 9, the shape of the blunt body 20 in the present application may be adjusted according to the characteristics of the wind field. The cross section of the blunt body 20 may be an equilateral polygon such as an equilateral pentagon, an equilateral hexagon, etc., or a polygon having unequal sides, or a shape formed by combining two or more cubes. Optionally, an airfoil-like structure may be added to the bluff body 20 to further optimize its aerodynamic characteristics.
Further, the stainless spring 50 in the present application may also be differently shaped, as shown in fig. 8. The stainless steel spring 50 having the shape of an hourglass in the embodiment a of fig. 8 is thicker at both ends and thinner at the center, so that it can be more stably coupled to the blunt body 20 and the base 10.
It should be noted that the micro-miniature electromagnetic wind power generation device provided in the present application may be installed on other objects, specifically, the base 10 may be installed on a specific object in an application environment, and the stainless steel spring 50 may be perpendicular to the ground. In practical use, the installation direction of the micro electromagnetic wind power generation device provided by the application can be changed according to actual needs, namely, the included angle between the stainless steel spring 50 and the ground is changed.
The technical features of the embodiments described above may be arbitrarily combined, the order of execution of the method steps is not limited, and for simplicity of description, all possible combinations of the technical features in the embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations of the technical features should be considered as the scope of the present description.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A microminiature electromagnetic wind power generation device, characterized in that it comprises:
a base;
the blunt body comprises a closed accommodating space, and an electromagnetic electromechanical conversion unit is arranged in the accommodating space and is used for converting vibration energy into electric energy;
the stainless steel spring is arranged between the base and the blunt body and is used for cooperating with the blunt body to convert wind energy into vibration energy; one end of the stainless steel spring is fixedly connected with the base, and the other end of the stainless steel spring is fixedly connected with the blunt body.
2. The microminiature electromagnetic wind power generation assembly according to claim 1, wherein said bluff body comprises an upper wall plate, a plurality of side wall plates, and a bottom plate; the upper wall plate, the plurality of side wall plates and the bottom plate are jointly surrounded to form the accommodating space; the stainless steel spring is fixedly connected with the bottom plate, so that the stainless steel spring is integrally and fixedly connected with the blunt body.
3. The micro-miniature electromagnetic wind power generation device of claim 1, wherein said bluff body is a housing with a closed top and an open bottom; the blunt body comprises an upper wall plate, a plurality of side wall plates and a bottom plate; the upper wall plate and the plurality of side wall plates are enclosed to form a shell with a closed top and an open bottom; the upper wall plate, the bottom plate and the plurality of side wall plates surround to form the closed accommodating space; the stainless steel spring is fixedly connected with the bottom plate, so that the spring is integrally and fixedly connected with the blunt body.
4. The microminiature electromagnetic wind power generation device according to claim 2 or 3, wherein the electromagnetic electromechanical conversion unit includes:
the electromagnetic vibration energy collectors are stacked and fixedly arranged on the surface of the bottom plate and are used for collecting vibration energy in different directions;
each electromagnetic vibration energy collector collects vibration energy in one direction.
5. The micro-miniature electromagnetic wind power generation device of claim 4, wherein said electromagnetic vibration energy harvester comprises:
the outer frame comprises a top cover, a left bottom plate, a right bottom plate and a bottom plate; the top cover, the left bottom plate, the right bottom plate and the bottom plate are surrounded to form a rectangular frame; the top cover includes a plurality of top cover runners, the bottom plate includes a plurality of bottom plate runners.
6. The microminiature electromagnetic wind power generation assembly of claim 5, wherein said outer frame further comprises:
one end of each coil support is embedded into the left bottom plate and fixedly connected with the left bottom plate through a screw, and the other end of each coil support is embedded into the right bottom plate and fixedly connected with the right bottom plate through a screw;
the coil arrays are embedded in the coil support; the number of the coil supports is equal to that of the coil arrays; each coil array is connected by M rectangular coils in sequence, and M is a positive integer greater than 2.
7. The micro-miniature electromagnetic wind power generation device of claim 6, wherein said electromagnetic vibration energy harvester further comprises an inner frame;
the inner frame comprises:
the permanent magnet array comprises a plurality of permanent magnet arrays, wherein each permanent magnet array is formed by sequentially connecting N rectangular permanent magnets, and N is a positive integer greater than 1;
each permanent magnet array is embedded in the inner surface of the upper frame, and a plurality of upper frame sliding grooves are formed in the outer surface of the upper frame;
each permanent magnet array is embedded in the inner surface of the lower frame, and a plurality of lower frame sliding grooves are formed in the outer surface of the lower frame.
8. The micro-miniature electromagnetic wind power generation device of claim 7, wherein said electromagnetic vibration energy harvester further comprises:
one end of the first spring is fixedly connected with the left bottom plate, and the other end of the first spring is fixedly connected with the lower frame;
one end of the second spring is fixedly connected with the right bottom plate, and the other end of the second spring is fixedly connected with the lower frame;
the first idler wheel is arranged in a space formed by buckling the top cover sliding groove and the upper frame sliding groove; the diameter of the first roller is larger than the sum of the depth of the top cover sliding groove and the depth of the upper frame sliding groove;
the first roller is arranged in a space formed by buckling the bottom plate sliding groove and the lower frame sliding groove; the diameter of the second roller is larger than the sum of the depth of the bottom plate sliding groove and the depth of the lower frame sliding groove.
9. The micro-miniature electromagnetic wind power generation device of claim 8, wherein said array of permanent magnets and said array of coils are juxtaposed and spaced apart between said top cover and said bottom plate.
10. The micro-miniature electromagnetic wind power plant of claim 9, wherein the surfaces of said base and said bluff body are coated with a corrosion resistant coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011640450.9A CN112701871A (en) | 2020-12-31 | 2020-12-31 | Microminiature electromagnetic type wind power generation set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011640450.9A CN112701871A (en) | 2020-12-31 | 2020-12-31 | Microminiature electromagnetic type wind power generation set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153625A (en) * | 2021-05-31 | 2021-07-23 | 重庆大学 | Box type wind power generation device and power generation device set |
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| CN106533113A (en) * | 2016-11-30 | 2017-03-22 | 重庆大学 | Collision-based broadband low-frequency electromagnetic type vibration energy collector |
| CN206650601U (en) * | 2016-12-26 | 2017-11-17 | 重庆交通大学 | Vibration generating device is flowed during a kind of hanging piezoelectric cantilever of cylindricality |
| CN208754206U (en) * | 2018-09-29 | 2019-04-16 | 扬州大学 | A kind of wind power piezoelectric generation device |
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| CN106533113A (en) * | 2016-11-30 | 2017-03-22 | 重庆大学 | Collision-based broadband low-frequency electromagnetic type vibration energy collector |
| CN206650601U (en) * | 2016-12-26 | 2017-11-17 | 重庆交通大学 | Vibration generating device is flowed during a kind of hanging piezoelectric cantilever of cylindricality |
| CN208754206U (en) * | 2018-09-29 | 2019-04-16 | 扬州大学 | A kind of wind power piezoelectric generation device |
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Application publication date: 20210423 |