Elastic resonance type rotating energy collecting device and method

Abstract

The invention discloses an elastic resonance type rotary energy collection device and method, and belongs to the technical field of energy collection and self-powered systems. The device comprises a shell, fan blades are arranged above the shell and connected with a bearing in the shell through a rotating shaft, a permanent magnet is annularly installed in the bearing, the rotating shaft is located in the bearing and provided with push rods, the bottom end in the shell is connected with a magnetic core through an elastic connecting piece, and the magnetic core winds a coil and is connected with a battery management module. The method comprises internal rotation and external rotation and can be used for collecting rotation or swing type energy such as breeze. The fan blades are blown by wind energy to drive the permanent magnet to rotate and move relative to the magnetic core, so that induced electromotive force is generated, and charging is carried out through rectification; the latter is externally excited to enable the fan blades to rotate to drive the permanent magnet to act with the magnetic core to generate induced electromotive force. The device can collect tiny and low-frequency energy and supply energy to micro devices, is small in size, high in power generation efficiency, flexible in material selection and wide in application scene, and has important significance in the field of energy collection.

Description

Technical Field

[0001] The present invention relates to the technical field of energy collection and self-powered systems, and in particular to an elastic resonance type rotational energy collection device and method. Background Art

[0002] The collection of tiny energies such as blue energy and breeze energy has always been a focus of scientific researchers. These energies are very common in nature. If there is a device that can collect these energies, then the scope of application of this device is very wide. How to collect these energies to power some devices such as sensors that are not easy to replace batteries or are not suitable for continuous wiring to transmit energy has become a major problem. Therefore, in some remote areas or areas where batteries are not easy to replace, it is extremely important to collect energy from the surrounding environment to have a self-powered system and provide sustainable off-grid power for smart infrastructure or low-power sensors and communication systems. Previous electromagnetic power generation devices, such as hydroelectric generators, large wind turbines, etc., collect mechanical energy, potential energy, etc. in nature and convert them into electrical energy. However, most of these devices are large in size and are used in fields where large amounts of energy are collected. They are not suitable for use in low-frequency or tiny device environments. And according to Faraday's law, Once the size of the electromagnetic power generation device is reduced, the electromotive force it generates will be greatly reduced. Summary of the invention

[0003] The purpose of the present invention is to provide an elastic resonance rotational energy collection device and method, which solves the problem that most existing devices are large in size, used in fields with large energy collection, and are not suitable for use in low-frequency or tiny device environments.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an elastic resonance type rotation energy collection device, including a shell, a fan blade is arranged above the shell, the fan blade is connected to the bearing arranged inside the shell through a rotating shaft, a permanent magnet is installed in the inner ring of the bearing, and the part of the rotating shaft located in the bearing is provided with a plurality of push rods, and a plurality of elastic connectors (spring sheets) are arranged at the bottom end of the shell, each of the elastic connectors is connected to a magnetic core, and a coil is wound around the outer surface of each magnetic core, and the coil is connected to a battery management module. Preferably, a plurality of the magnetic cores are connected to the bottom end of the shell through a plurality of the elastic connectors, and are arranged in a ring shape.

[0005] Preferably, a gap of 2-3 mm is maintained between the magnetic core and the permanent magnet.

[0006] Preferably, the battery management module includes a battery and a rectifier, the battery is electrically connected to the coil via a line, and the rectifier is installed on the line.

[0007] Preferably, the length of the push rod is not greater than the radius of the bearing.

[0008] Preferably, the permanent magnet is made of super strong magnet material.

[0009] Preferably, the magnetic core is made of high magnetic permeability material.

[0010] An elastic resonance rotation energy collection method includes two methods: breeze energy collection and external rotation power generation; wherein the specific steps of breeze energy collection are as follows: S11. When the wind energy blows the fan blades to rotate, the rotating shaft is driven to rotate, so that the push rod pushes the permanent magnet to rotate; S12, during the rotation process, the permanent magnet moves relative to the magnetic core, causing the magnetic flux entering the coil to change, causing the closed coil to generate current and induced electromotive force; S13. The magnetic force of the permanent magnet drives the magnetic core to move. Under the action of the elastic force of the spring sheet and the Ampere force, the magnetic core swings back and forth, increasing the rate of change of the magnetic flux and improving the power generation efficiency. S14, converting the induced electromotive force into direct current through a rectifier to charge the battery and complete energy collection; The specific steps of external rotation power generation are as follows: S21, external excitation causes the fan blade to rotate, and the permanent magnet is driven to rotate through the shaft and the rotor; S22. The permanent magnet and the magnetic core move relative to each other, causing the magnetic flux entering the coil to change. The closed coil generates current and induced electromotive force, and the spring sheet increases the rate of change of magnetic flux to achieve energy collection.

[0011] Therefore, the elastic resonance type rotation energy collection device and method using the above structure of the present invention has the following beneficial effects: (1) The present invention can collect tiny, low-frequency energy and can be applied to the energy supply of micro-devices, solving the problem that most existing devices are large in size and only suitable for collecting large amounts of energy, but not suitable for low-frequency or tiny device environments. It can provide sustainable off-grid power for smart infrastructure, low-power sensors, and communication systems in remote areas where batteries are difficult to replace.

[0012] (2) The present invention adds elastic devices such as spring sheets. According to Lenz's law, part of the external rotating mechanical energy is directly converted into induced electromotive force, and the other part is converted into elastic potential energy, which is then converted into induced electromotive force through resonant swing. The permanent magnet drives the magnetic core to swing together, so that the originally fixed magnetic core also has magnetic flux changes. The elastic potential energy is released under the action of the spring sheet, and the rate of change of magnetic flux increases, which greatly improves the generation of induced electromotive force. When the magnetic core and the magnet resonate and swing, the end faces can be staggered at the maximum relative speed, realizing the maximum efficiency of electromagnetic power generation.

[0013] (3) The shapes of the permanent magnet and the soft magnetic core of the present invention can be changed according to the application scenario, and the positions of the winding core and the permanent magnet can be swapped as needed. Permanent magnets can be made of super-strong magnets such as neodymium iron boron materials; soft magnetic cores can be made of various high magnetic permeability materials such as silicon steel and ferrite; spring sheets can be made of materials such as spring steel and stainless steel that have a certain elastic modulus and are not easy to interfere with the magnetic field; and rigid shells can be made of materials such as aluminum alloy and plastic that have low interference with magnetic wires.

[0014] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an elastic resonance type rotation energy collection device and method of the present invention; Figure 2 A schematic diagram of the arrangement of bearing magnets of an elastic resonance type rotational energy collection device and method of the present invention; Figure 3 It is a schematic diagram of the magnetic core swinging process of an elastic resonance type rotation energy collection device and method of the present invention; Figure 4 A schematic diagram of an elastic resonance type internal rotating generator of an elastic resonance type rotating energy collection device and method of the present invention; Figure 5 It is a schematic diagram of a voltage output example of a single pair of magnetic cores and magnets of an elastic resonance type rotational energy collection device and method of the present invention; Reference numerals 1. Fan blade, 2. Rotating shaft, 3. Magnetic core, 4. Coil, 5. Elastic connector, 6. Housing, 7. Permanent magnet, 8. Bearing, 9. Rectifier, 10. Battery, 11. Push rod, 12. Relative motion, 13. Swing, 14. Rotor. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0017] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] Example Since the traditional wind power generation device is large in size, it is not only inconvenient to install but also expensive to process, and the power per unit area is also small. If the electromagnetic power generation device is to be applied in low-frequency and micro fields, the induced electromotive force generated is insufficient. Therefore, the present invention provides an elastic resonance rotation energy collection device (such as Figure 1-Figure 3As shown in FIG. 1 , the elastic resonance breeze energy collector is composed of a wind blade, a housing, a magnetic core, a permanent magnet, a bearing, a coil, a rotating shaft, and an elastic connector to form a basic device structure. First, the wind blade 1 is installed above the rotating shaft 2 as a medium for collecting wind energy. Secondly, the cylindrical permanent magnet 7 is placed on the inner ring of the bearing 8, and a push rod is connected to the lower part of the rotating shaft. The cylindrical permanent magnet 7 in the bearing 8 is pushed to rotate by the push rod 11. Under this condition, the permanent magnet 7 can act as both a magnetic field source and a rotating bead of the bearing 8. The wind energy rotates the rotating shaft 2 through the wind blade 1, so that the push rod 11 pushes the permanent magnet 7, making the rotation easier. Thirdly, the winding magnetic core 3 is connected to the bottom of the housing 6 through the elastic connector 5 (spring sheet), and is arranged in a ring shape at the bottom of the housing 6. The gap between the magnetic core 3 and the permanent magnet 7 should be as small as possible (2-3 mm), as long as no collision occurs during the swing 13. In this state, only a small relative movement 12 is required to generate a large induced electromotive force. When the fan blade 1 rotates, the permanent magnet 7 and the magnetic core 3 move relative to each other 12, so that the magnetic flux entering the coil 4 changes, and the closed coil 4 generates current, thereby generating an induced electromotive force. Whether it is forward rotation or reverse rotation, or reciprocating rotation, the device can collect part of the energy to convert it into electric energy. In addition, when the permanent magnet 7 rotates, because the super strong magnetic force will drive the magnetic core 3 to move, the change of the magnetic moment makes the magnetic force increase and decrease all the time. Under the action of the elastic force of the spring sheet and the Ampere force, the elastic potential energy is continuously stored and released, so that the magnetic core 3 keeps swinging back and forth 13, so that the rate of change of the magnetic flux changes further. Wherein, as shown in Figure 2, the arrangement of the cylindrical permanent magnet 7 can be arranged in the same direction. In this case, the magnetic field lines are subject to the effect of like-sex repulsion, and most of them will be vertical downward, so that the magnetic field lines pass through the winding magnetic core 3 more. In addition, when rotating, each pair of permanent magnets 7 receives the repulsive force, which will be easier to rotate. The number of permanent magnets 7 and magnetic cores 3 should be avoided to be consistent, so as to prevent the phenomenon of jamming (the positions of the winding magnetic core and the permanent magnet can be interchanged). Finally, the collected induced electromotive force is converted into direct current through the rectifier 9, so as to charge the battery 10, and finally realize the collection of breeze energy.

[0019] like Figure 4As shown, the elastic resonance type external rotating generator is similar to the elastic resonance type breeze energy collector, and is composed of a fan blade, a housing, a magnetic core, a permanent magnet, a rotor, a coil, a rotating shaft, and an elastic connector to form a basic device structure. The permanent magnet 7 is fixed on the rotor 14. When the external excitation disturbance causes the fan blade 1 to rotate, the permanent magnet 7 will be driven to rotate through the rotating shaft 2 and the rotor 14. During rotation, the permanent magnet 7 and the magnetic core 3 move relative to each other 12, so that the magnetic flux entering the coil 4 changes, and the closed coil 4 generates current, thereby generating an induced electromotive force. The role of the spring sheet is the same as that of the elastic resonance type breeze energy collector, thereby increasing the rate of change of the magnetic flux. (It is worth noting that the number of permanent magnets and magnetic cores should have at least one factor that is not 360, so that it is not easy to get stuck).

[0020] Assume that the number of permanent magnets 7 and magnetic cores 3 are both factors of 360, for example, 12. During the operation of the device, due to the limitations of the manufacturing process and assembly accuracy, the relative positions of the permanent magnets 7 and the magnetic cores 3 may periodically completely overlap. When this overlap occurs, the magnetic force distribution becomes extremely uneven, which may cause the magnetic core 3 to be subjected to excessive lateral magnetic force, so that the magnetic core 3 cannot swing normally under the restriction of the elastic connector 5, thereby hindering the rotation of the entire device and eventually causing it to get stuck.

[0021] When at least one of the numbers of the permanent magnets 7 and the magnetic cores 3 is not a factor of 360, for example, the number of the permanent magnets 7 is 11 and the number of the magnetic cores 3 is 12. During the rotation process, their relative positions will not completely overlap regularly, and the magnetic force distribution is always in a dynamically changing and relatively uniform state. The magnetic core 3 can swing smoothly under the action of the elastic connector 5, thereby effectively avoiding the occurrence of the jamming phenomenon and ensuring the stable operation of the device and the energy collection efficiency.

[0022] An elastic resonance rotation energy collection method includes two methods: breeze energy collection and external rotation power generation; wherein the specific steps of breeze energy collection are as follows: S11. When the wind energy blows the fan blades to rotate, the rotating shaft is driven to rotate, so that the push rod pushes the permanent magnet to rotate; S12, during the rotation process, the permanent magnet moves relative to the magnetic core, causing the magnetic flux entering the coil to change, causing the closed coil to generate current and induced electromotive force; S13. The magnetic force of the permanent magnet drives the magnetic core to move. Under the action of the elastic force of the spring sheet and the Ampere force, the magnetic core swings back and forth, increasing the rate of change of the magnetic flux and improving the power generation efficiency. S14, converting the induced electromotive force into direct current through a rectifier to charge the battery and complete energy collection; The specific steps of external rotation power generation are as follows: S21, external excitation causes the fan blade to rotate, and the permanent magnet is driven to rotate through the shaft and the rotor; S22. The permanent magnet and the magnetic core move relative to each other, causing the magnetic flux entering the coil to change. The closed coil generates current and induced electromotive force, and the spring sheet increases the rate of change of magnetic flux to achieve energy collection.

[0023] The present invention forms a simple electromagnetic power generation device through a permanent magnet and a soft magnetic core wound around a coil, wherein the permanent magnet should in principle use a super strong magnet, such as: nebium iron boron material. The soft magnetic core should be made of a material with high magnetic permeability. For example, silicon steel (relative magnetic permeability 7000-10000), ferrite (about 10000), nickel-iron alloy (about 2000), manganese-zinc ferrite (300-5000) and permalloy (20000-200000). The spring sheet should use a material with a certain elastic modulus and not easy to interfere with the magnetic field, such as: spring steel, stainless steel. Other rigid shells should use materials with low interference to magnetic wires, such as aluminum alloy, plastic and other materials. The shape of the permanent magnet and the soft magnetic core can be changed according to the application scenario, such as cylindrical, fan-shaped and strip-shaped shapes, and the position of the winding core and the permanent magnet can also be swapped according to demand.

[0024] The present invention aims at supplying energy to micro-devices and collecting low-frequency and tiny energy. The overall size of the transposition is small, and the size of a single power generation unit is about 60*8*8 mm. A coil with about 2400 turns is wound on a cylindrical magnetic core, and the wire diameter is 0.01 mm. The overall resistance is about 200 Ω, and the frequency of the permanent magnet movement is 10 Hz. Under this condition, as shown in Figure 5, the open circuit voltage peak value of the elastic resonance power generation unit of a single pair of magnetic cores and magnets is measured to be 1.38 V.

[0025] Therefore, the present invention adopts the above-mentioned elastic resonance type rotation energy collection device and method, which can collect rotating, reciprocating low-frequency mechanical energy. By adding elastic devices such as spring sheets, due to Lenz's law, when the mechanical energy during external rotation is systemized, part of these mechanical energies are directly converted into induced electromotive force, and the other part is converted into elastic potential energy, and then converted into induced electromotive force through resonant swing. The permanent magnet can drive the magnetic core to swing together. The original fixed magnetic core also has a magnetic flux change rate, but under the action of the spring sheet, part of the elastic potential energy is released together, so that the magnetic flux change rate is further increased, which greatly improves the generation of induced electromotive force. When the magnetic core and the magnet resonate and swing, the end face is staggered at the maximum relative speed, so that the electromagnetic power generation efficiency can be maximized.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. An elastic resonance rotation energy harvesting device, characterized in that: It includes a shell, a fan blade is arranged above the shell, the fan blade is connected to a bearing arranged inside the shell through a rotating shaft, a permanent magnet is installed in the inner ring of the bearing, and a portion of the rotating shaft located in the bearing is provided with a plurality of push rods, a plurality of elastic connecting parts are arranged at the bottom end inside the shell, each of the elastic connecting parts is connected to a magnetic core, a coil is wound around the outer surface of each of the magnetic cores, and the coil is connected to a battery management module.

2. The elastic resonance rotation energy harvesting device according to claim 1, characterized in that: A plurality of the magnetic cores are connected to the bottom end of the shell through a plurality of the elastic connecting members and are arranged in a ring shape.

3. The elastic resonance rotation energy harvesting device according to claim 1, characterized in that: A gap of 2-3 mm is maintained between the magnetic core and the permanent magnet.

4. The elastic resonance rotation energy harvesting device according to claim 1, characterized in that: The battery management module includes a battery and a rectifier. The battery is electrically connected to the coil via a circuit, and the rectifier is installed on the circuit.

5. The elastic resonance rotation energy harvesting device according to claim 1, characterized in that: The length of the push rod is not greater than the radius of the bearing.

6. The elastic resonance rotation energy harvesting device according to claim 1, characterized in that: The permanent magnet is made of super strong magnet material.

7. The elastic resonance rotation energy harvesting device according to claim 1, characterized in that: The magnetic core is made of high magnetic permeability material.

8. An elastic resonance type rotational energy collection method, applied to an elastic resonance type rotational energy collection device according to any one of claims 1 to 7, characterized in that: include: There are two ways: breeze energy collection and external rotation power generation; the specific steps of breeze energy collection are as follows: S11. When the wind energy blows the fan blades to rotate, the rotating shaft is driven to rotate, so that the push rod pushes the permanent magnet to rotate; S12, during the rotation process, the permanent magnet moves relative to the magnetic core, causing the magnetic flux entering the coil to change, causing the closed coil to generate current and induced electromotive force; S13. The magnetic force of the permanent magnet drives the magnetic core to move. Under the action of the elastic force of the spring sheet and the Ampere force, the magnetic core swings back and forth, increasing the rate of change of the magnetic flux and improving the power generation efficiency. S14, converting the induced electromotive force into direct current through a rectifier to charge the battery and complete energy collection; The specific steps of external rotation power generation are as follows: S21, external excitation causes the fan blade to rotate, and the permanent magnet is driven to rotate through the shaft and the rotor; S22. The permanent magnet and the magnetic core move relative to each other, causing the magnetic flux entering the coil to change. The closed coil generates current and induced electromotive force, and the spring sheet increases the rate of change of magnetic flux to achieve energy collection.

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