Piezoelectric wind energy harvesting device based on magnetic chaotic pendulum

Abstract

The present application discloses a piezoelectric wind energy capture device based on a magnetic chaotic pendulum, the piezoelectric wind energy capture device comprising: a base; a wind force rotating mechanism, the wind force rotating mechanism comprising a rotating main shaft, a radial fan group, a first chaotic pendulum main pendulum group and a chaotic pendulum secondary pendulum group, the rotating main shaft is rotatably arranged on the base, the radial fan group and the first chaotic pendulum main pendulum group are both fixedly arranged on the rotating main shaft, and the chaotic pendulum secondary pendulum group is rotatably arranged on the first chaotic pendulum main pendulum group; a power generation mechanism, the power generation mechanism comprising a plurality of stator magnets, a plurality of piezoelectric sheets and a plurality of rotor magnets, the number of the stator magnets, the piezoelectric sheets and the rotor magnets corresponds to each other, the stator magnet is arranged on the base on a side facing the chaotic pendulum secondary pendulum group, the piezoelectric sheet is arranged on the base on a side facing away from the chaotic pendulum secondary pendulum group, and a plurality of rotor magnets are arranged on the chaotic pendulum secondary pendulum group; the magnetic poles of the rotor magnet and the stator magnet relative to each other are the same.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a piezoelectric wind energy capture device based on a magnetic chaotic pendulum. Background Art

[0002] Currently, most of the existing wind energy conversion devices are large wind turbines. This type of structure is mostly used in environments with high wind speeds and abundant wind energy. However, this type of device is large in size and complex in structure, so it occupies a large area and has a high manufacturing cost. The piezoelectric wind energy capture structure has the advantages of simple structure and high energy conversion efficiency. However, the existing piezoelectric wind energy capture structure, such as the invention patent with publication number CN108134539A, discloses a rotary wind energy capture device, which drives the first fan blade to rotate through wind energy, and the first fan blade drives the second fan blade to rotate through the shaft unit. The second fan blade hits the piezoelectric ceramic sheet fixed on the piezoelectric bin at a certain frequency, and the piezoelectric ceramic sheet is deformed and generates electricity. However, the device needs to hit the piezoelectric ceramic sheet through the fan blade to generate electricity. This striking effect may cause damage to the piezoelectric ceramic sheet and the fan blade during long-term operation, which may reduce the operating life of the device. For example, the invention patent with publication number CN104989597A discloses a vertical axis radial excitation type wind energy capture device, which uses wind energy to drive the rotation of a moving wind wheel with a hemispherical structure, and the moving wind wheel drives a magnet The rotor rotates, and cantilever beams with magnets installed at the free ends are distributed around the rotor. The magnets on the rotor excite the magnets on the cantilever beams, and cause the cantilever beams to vibrate to generate electrical energy. However, during the rotation of the device, the resistance between the magnets will generate a resistance torque on the rotor, and the resistance torque will cause the device to fail to operate normally in a low wind speed environment. For example, the invention patent with the publication number CN107425753A discloses a speed-increasing wind piezoelectric power generation device, which connects a fan to a pair of gears with different radii, and increases the speed of the structure through the gears. The gear with a smaller radius is coaxial with 12 piezoelectric cantilever vibrators with magnets fixed at one end. The piezoelectric cantilever vibrator is surrounded by a hexagonal shell, and magnets are fixed on each plane of the hexagon. The rotation of the gear drives the piezoelectric cantilever vibrator to rotate, and the fixed magnets on the shell generate an exciting force on the magnets on the piezoelectric cantilever vibrator, thereby generating electrical energy. The device needs to increase the speed of the device through a gear set. However, when the transmission ratio of the gear is higher, the starting torque of the device is higher, which will cause the device to fail to start in a low wind speed environment. That is to say, the design of the existing piezoelectric wind energy capture device has the following problems: First, the design of the existing piezoelectric wind energy capture device is easily damaged; Second, the design of the existing piezoelectric wind energy capture device cannot operate in a low wind speed environment.

[0003] Therefore, the existing technology still needs to be improved and developed. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a piezoelectric wind energy capture device based on a magnetic chaotic pendulum in view of the deficiencies in the prior art, so as to solve the problems that the prior piezoelectric wind energy capture device is easily damaged and the rotor cannot overcome the magnetic resistance torque at low wind speeds.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a piezoelectric wind energy capture device based on a magnetic chaotic pendulum, and the piezoelectric wind energy capture device includes:

[0006] Pedestal;

[0007] A wind-driven rotating mechanism, the wind-driven rotating mechanism comprising a rotating main shaft, a radial fan group, a first chaotic pendulum main pendulum group and a chaotic pendulum secondary pendulum group, the rotating main shaft is rotatably arranged on the base, the radial fan group and the first chaotic pendulum main pendulum group are both fixedly arranged on the rotating main shaft, and the chaotic pendulum secondary pendulum group is rotatably arranged on the first chaotic pendulum main pendulum group;

[0008] A power generation mechanism, the power generation mechanism includes a plurality of stator magnets, a plurality of piezoelectric sheets and a plurality of rotor magnets, the numbers of the stator magnets, the piezoelectric sheets and the rotor magnets correspond to each other, the stator magnets are arranged on the side of the base facing the chaotic pendulum group, the piezoelectric sheets are arranged on the side of the base facing away from the chaotic pendulum group, and a plurality of the rotor magnets are arranged on the chaotic pendulum group; wherein the relative magnetic poles of the rotor magnet and the stator magnet are the same.

[0009] In one implementation, the radial fan group includes a fan support cylinder and a plurality of radial fans, the fan support cylinder is fixedly disposed on the rotating main shaft, and the plurality of radial fans are evenly distributed on the fan support cylinder.

[0010] In one implementation, the cross-section of the radial fan is arc-shaped.

[0011] In one implementation, the first chaotic pendulum main pendulum group includes a plurality of first chaotic pendulum main pendulum rods, and the plurality of chaotic pendulum main pendulum rods are evenly fixed on the rotating main shaft.

[0012] In one implementation, the chaotic pendulum secondary pendulum group includes a plurality of rotating sleeves and a plurality of chaotic pendulum secondary pendulum rods, the plurality of rotating sleeves are rotatably disposed on a plurality of the first chaotic pendulum main pendulum rods respectively, the chaotic pendulum secondary pendulum rods are fixedly disposed on the rotating sleeves, and the rotor magnet is disposed on the chaotic pendulum secondary pendulum rods.

[0013] In one implementation, the wind-driven rotating mechanism also includes a second chaotic pendulum main pendulum group, which includes a plurality of extension shafts and a plurality of second chaotic pendulum main pendulum rods, one end of the extension shaft is connected to the first chaotic pendulum main pendulum rod, and the other end is connected to the second chaotic pendulum main pendulum rod.

[0014] In one implementation, a plurality of magnetic piezoelectric clamped beam groups are arranged in a mirror image along the center point of the base, and the magnetic piezoelectric clamped beam group includes:

[0015] A first fixing bracket, wherein the first fixing bracket is disposed on the base;

[0016] a second fixing bracket, the second fixing bracket being arranged on the base;

[0017] A magnetic piezoelectric clamped beam, one end of which is connected to the first fixing bracket, and the other end of which is connected to the second fixing bracket.

[0018] In one implementation, a plurality of first chaotic pendulum main pendulum groups are correspondingly arranged on the rotating main shaft, and each first chaotic pendulum main pendulum group is correspondingly arranged with a chaotic pendulum secondary pendulum group and a power generation mechanism.

[0019] In one implementation, a plurality of first chaotic pendulum main pendulum groups are correspondingly arranged on the rotating main shaft, and each first chaotic pendulum main pendulum group is correspondingly arranged with a power generation mechanism and a plurality of chaotic pendulum secondary pendulum groups.

[0020] In one implementation, a first chaotic pendulum main pendulum group is disposed on the rotating main shaft, and a plurality of chaotic pendulum secondary pendulum groups and a power generation mechanism are configured on the first chaotic pendulum main pendulum group.

[0021] Beneficial effect: The present application sets a rotating main shaft, a first chaotic pendulum main pendulum group, a chaotic pendulum secondary pendulum group, a radial fan group, a stator magnet, a rotor magnet and a piezoelectric sheet. When the wind speed in the environment is relatively low, that is, when the wind speed is low, the wind force will drive the radial fan group on the rotating main shaft to rotate, and drive the first chaotic pendulum main pendulum group and the chaotic pendulum secondary pendulum group on the rotating main shaft to rotate. When the rotor magnet on the chaotic pendulum secondary pendulum group approaches the stator magnet on the base, the mutual repulsion between magnets of the same pole continues to increase, which will cause the rotor magnet on the chaotic pendulum secondary pendulum group to rotate in the opposite direction of the radial fan group on the rotating main shaft, thereby causing the rotor magnet to move away from the stator magnet. The increase in the distance between the rotor magnet and the stator magnet will reduce the magnetic repulsion, thereby preventing the generation of an excessively large magnetic resistance torque that causes the rotor magnet to rotate. Stop rotating; when the wind speed in the environment gradually increases, the speed of the radial fan group gradually becomes faster. At this time, when the rotor magnet approaches the stator magnet, the speed will also become faster, and the magnetic repulsion between the rotor magnet and the stator magnet will also increase faster. The rapidly increasing magnetic repulsion will cause the secondary pendulum to produce a more obvious and faster reversal movement. At this time, the chaotic pendulum secondary pendulum group will quickly complete a circle of reversal movement before the first chaotic pendulum main pendulum group turns to a position away from the stator magnet, and approach the stator magnet again, thereby completing the second excitation of the stator magnet. Under this effect, the excitation frequency of the rotor magnet to the stator magnet will increase, thereby increasing the output power of the piezoelectric film. This embodiment uses stator magnets and rotor magnets for excitation, which is non-contact, thereby ensuring that the piezoelectric wind energy capture device of this embodiment is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without inventive work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a piezoelectric wind energy capture device based on a magnetic chaotic pendulum provided in this application.

[0024] Figure 2 This is a front view structural schematic diagram of the piezoelectric wind energy capture device based on the magnetic chaotic pendulum provided in this application.

[0025] Figure 3 This is a schematic diagram of the top view of the piezoelectric wind energy capture device based on the magnetic chaotic pendulum provided in this application.

[0026] In the figure: 01, base; 20, rotating main shaft; 210, fan support tube; 211, radial fan; 212, connecting rod; 220, first chaotic pendulum main swing rod; 221, chaotic pendulum bearing; 230, rotating sleeve; 231, chaotic pendulum secondary swing rod; 240, second chaotic pendulum main swing rod; 300, magnetic piezoelectric fixed support beam; 301, first fixed bracket; 302, second fixed bracket; 31, stator magnet; 32, piezoelectric sheet; 33, rotor magnet. DETAILED DESCRIPTION

[0027] The present application provides a piezoelectric wind energy capture device based on a magnetic chaotic pendulum. In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0028] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0029] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0030] The application content is further explained below through the description of embodiments in conjunction with the accompanying drawings.

[0031] like Figure 1-3As shown, this embodiment provides a piezoelectric wind energy capture device based on a magnetic chaotic pendulum, the piezoelectric wind energy capture device includes a base 01, a wind rotation mechanism and a power generation mechanism, the wind rotation mechanism is rotatably arranged on the base 01, and the power generation mechanism is fixed around the circumferential side of the base 01; the wind rotation mechanism includes a rotating main shaft 20, a radial fan group, a first chaotic pendulum main pendulum group and a chaotic pendulum secondary pendulum group, a first rotating hole (not shown in the figure) is opened at the center of the base 01, a first bearing (not shown in the figure) is installed on the first rotating hole, the rotating main shaft 20 is rotatably arranged at the center of the base 01 through the first bearing, the radial fan group and the first chaotic pendulum main pendulum group are fixedly arranged on the rotating main shaft 20 from top to bottom in sequence. The chaotic pendulum secondary pendulum group is rotatably arranged on the first chaotic pendulum main pendulum group, that is, the first chaotic pendulum main pendulum group and the chaotic pendulum secondary pendulum group rotate around the rotation principal axis 20, and the chaotic pendulum secondary pendulum group also rotates around the first chaotic pendulum main pendulum group; a plurality of magnetic piezoelectric fixed beam groups are mirror-set along the center point of the base, the power generation mechanism includes a plurality of stator magnets 31, a plurality of piezoelectric sheets 32 and a plurality of rotor magnets 33, the number of the magnetic piezoelectric fixed beam groups, the stator magnets 31, the piezoelectric sheets 32 and the rotor magnets 33 is one-to-one corresponding, the stator magnet 31 is arranged on the magnetic piezoelectric fixed beam group on the side facing the chaotic pendulum secondary pendulum group, the piezoelectric sheets 32 are arranged on the magnetic piezoelectric fixed beam group on the side facing away from the chaotic pendulum secondary pendulum group, a plurality of the rotor magnets 33 are arranged on the chaotic pendulum secondary pendulum group, and the magnetic poles of the rotor magnets 33 and the stator magnets 31 relative to each other are the same poles.In this embodiment, when the wind speed in the environment is relatively low, that is, when the wind speed is low, the wind force will drive the radial fan group on the rotating main shaft 20 to rotate, and drive the first chaotic pendulum main pendulum group and the chaotic pendulum secondary pendulum group on the rotating main shaft 20 to rotate. When the rotor magnet 33 on the chaotic pendulum secondary pendulum group is close to the stator magnet 31 on the magnetic piezoelectric fixed beam group, the mutual repulsion between the magnets of the same poles continues to increase, which will cause the rotor magnet 33 on the chaotic pendulum secondary pendulum group to rotate in the opposite direction to the radial fan group on the rotating main shaft 20, thereby causing the rotor magnet 33 When the rotor magnet 33 is far away from the stator magnet 31, the distance between the rotor magnet 33 and the stator magnet 31 increases, which will reduce the magnetic repulsion force, thereby preventing the rotor magnet 33 from stopping due to excessive magnetic resistance torque; when the wind speed in the environment gradually increases, the speed of the radial fan group gradually increases. At this time, when the rotor magnet 33 approaches the stator magnet 31, the speed will also increase, and the magnetic repulsion between the rotor magnet 33 and the stator magnet 31 will also increase faster. The rapidly increasing magnetic repulsion force will cause the secondary pendulum to produce a more obvious and faster reversal movement. At this time, the chaotic pendulum secondary pendulum group will quickly complete a circle of reversal movement before the first chaotic pendulum main pendulum group turns to a position away from the stator magnet 31, and approach the stator magnet 31 again, thereby completing the second excitation of the stator magnet 31. Under this action, the excitation frequency of the rotor magnet 33 on the stator magnet 31 will increase, thereby increasing the output power of the piezoelectric film 32. This embodiment uses stator magnets and rotor magnets for excitation, which is non-contact, thereby ensuring that the piezoelectric wind energy capture device of this embodiment is not easily damaged.

[0032] like Figure 1-3 As shown, in one embodiment, the radial fan group includes a fan support tube 210 and a plurality of radial fans 211, the fan support tube 210 is provided with a first hexagonal nut, the fan support tube 210 is fixedly provided on the rotating main shaft 20 through the first hexagonal nut, the fan support tube 210 is provided with a plurality of connecting rods 212, the connecting rods 212 correspond to the radial fans 211 one by one, and the plurality of radial fans 211 are evenly distributed on the fan support tube 210 through the connecting rods 212. In this embodiment, four radial fans 211 are provided. In this embodiment, four radial fans 211 are evenly provided on the fan support tube 210. Compared with one radial fan 211, the four evenly provided radial fans 211 increase the area in contact with the wind, so that the fans can be evenly driven by more wind to improve the utilization rate of wind energy.

[0033] like Figure 1-3As shown, in one embodiment, the larger the area of ​​the radial fan 211 in contact with the wind, the higher the utilization rate of the wind energy. The cross-section of the radial fan 211 of this embodiment is arranged to be an arc shape and extends in a direction perpendicular to the cross-section. Compared with a flat fan shape, the radial fan 211 with an arc-shaped cross-section in this embodiment can maximize the contact with the wind within a unit distance, thereby improving the utilization rate of wind energy.

[0034] like Figure 1-3 As shown, in one embodiment, the first chaotic pendulum main pendulum group includes a plurality of first chaotic pendulum main pendulum rods 220, and the plurality of first chaotic pendulum main pendulum rods 220 may be connected in an integral manner or connected by bolts. In this embodiment, a second hexagonal nut (not shown in the figure) is arranged at the center of the plurality of first chaotic pendulum main pendulum rods 220, and the rotating main shaft 20 is fixedly connected to the plurality of first chaotic pendulum main pendulum rods 220 through the second hexagonal nut, and the plurality of first chaotic pendulum main pendulum rods 220 are evenly fixed on the rotating main shaft 20, and the number of the first chaotic pendulum main pendulum rods 220 is the same as the number of the rotor magnets 33.

[0035] like Figure 1-3 As shown, in one embodiment, each first chaotic pendulum main pendulum rod 220 is provided with a second rotating hole at one end away from the second hexagonal nut, and a chaotic pendulum bearing 221 is installed on the second rotating hole. The chaotic pendulum secondary pendulum group includes a plurality of rotating sleeves 230 and a plurality of chaotic pendulum secondary pendulum rods 231. The rotating sleeves 230 correspond to the first chaotic pendulum main pendulum rods 220 one by one. The rotating sleeves 230 are rotatably set on the first chaotic pendulum main pendulum rod 220 through the chaotic pendulum bearing 221. The chaotic pendulum secondary pendulum rod 231 is fixedly set on the outer surface of the rotating sleeve 230, and the rotor magnet 33 is set on the end of the chaotic pendulum secondary pendulum rod 231 away from the rotating sleeve 230.

[0036] like Figure 1-3As shown, in one embodiment, the wind-driven rotating mechanism further includes a second chaotic pendulum main pendulum group, and the second chaotic pendulum main pendulum group includes a plurality of first extension shafts (not shown in the figure) and a plurality of second chaotic pendulum main pendulum rods 240, wherein the number and structural design of the second chaotic pendulum main pendulum rods 240 are the same as those of the first chaotic pendulum main pendulum rods 220, and will not be repeated here, the first extension shaft is arranged in the rotating sleeve 230, one end of the first extension shaft is fixedly connected to the first chaotic pendulum main pendulum rod 220, and the other end is fixedly connected to the second The chaotic pendulum main pendulum rod 240 is fixedly connected, that is, the first chaotic pendulum main pendulum group and the second chaotic pendulum main pendulum group are two upper and lower pendulums with the same rotation angle. When the wind drives the radial fan 211, the rotation of the first chaotic pendulum main pendulum group and the second chaotic pendulum main pendulum group driven by the radial fan 211 can ensure that the first chaotic pendulum main pendulum group and the chaotic pendulum secondary pendulum group can rotate around the rotating main axis 20 without easily deviating from the rotating main axis 20, thereby making the entire device more stable during rotation, thereby improving the stability of wind energy utilization.

[0037] like Figure 1-3 As shown, in one embodiment, the magnetic piezoelectric fixed-support beam group includes a first fixed bracket 301, a second fixed bracket 302 and a magnetic piezoelectric fixed-support beam 300, the first fixed bracket 301 is arranged on the base 01, the second fixed bracket 302 is arranged on the base 01, the first fixed bracket 301 is provided with a first mounting groove (not shown in the figure), the second fixed bracket 302 is provided with a second mounting groove (not shown in the figure), one end of the magnetic piezoelectric fixed-support beam 300 is fixedly installed in the first mounting groove, and the other end is fixedly installed in the second mounting groove, wherein the magnetic piezoelectric fixed-support beam 300 is installed in the first mounting groove and the second mounting groove by bolt connection, adhesive or other connection methods, which are not limited here, as long as the fixing method can be satisfied.

[0038] In one embodiment, several first chaotic pendulum main pendulum groups are correspondingly arranged on the rotating main shaft, and each first chaotic pendulum main pendulum group is correspondingly arranged with a chaotic pendulum secondary pendulum group and a power generation mechanism, wherein the several means more than one, that is, under the same wind force, the more the number of first chaotic pendulum main pendulum groups is, the more energy generated by the first chaotic pendulum main pendulum group, the chaotic pendulum secondary pendulum group and the power generation mechanism is utilized by the radial fan group, so as to better improve the utilization rate of wind energy.

[0039] In one embodiment, a plurality of first chaotic pendulum main pendulum groups are correspondingly arranged on the rotating main shaft, and each of the first chaotic pendulum main pendulum groups is correspondingly arranged with a power generation mechanism and a plurality of chaotic pendulum secondary pendulum groups, wherein each of the first chaotic pendulum main pendulum groups includes a plurality of first chaotic pendulum main pendulum rods and / or third bearings, and the chaotic pendulum secondary pendulum groups include a plurality of chaotic pendulum secondary pendulum rods, and the number of the chaotic pendulum secondary pendulum rods is several times that of the first chaotic pendulum main pendulum rod, that is, each of the first chaotic pendulum main pendulum rods is configured with a plurality of chaotic pendulum secondary pendulum rods, and each of the plurality of chaotic pendulum rods on the first chaotic pendulum main pendulum rod is The secondary swing rod can be integrally arranged on the first chaotic pendulum main swing rod, or a plurality of third bearings corresponding to the number of the chaotic pendulum secondary swing rods can be arranged, the third bearing is fixedly arranged on the first chaotic pendulum main swing rod, and the chaotic pendulum secondary swing rods are correspondingly arranged on the third bearings, so that each chaotic pendulum secondary swing rod can freely rotate on the first chaotic pendulum main swing rod, and a rotor magnet is arranged on one end of each chaotic pendulum secondary swing rod, so that the number of times the rotor magnet generates an exciting force on the magnetic piezoelectric fixed support beam in the same time can be increased, so as to improve the power generation efficiency.

[0040] Of course, referring to the above embodiment, for some places with limited space, since the space occupied by the first chaotic pendulum main pendulum group is relatively large, in the present embodiment, only one first chaotic pendulum main pendulum group may be arranged on the rotating main shaft, and the first chaotic pendulum main pendulum group corresponds to a power generation mechanism and several chaotic pendulum secondary pendulum groups.

[0041] The working principle of the piezoelectric wind energy capture device based on the magnetic chaotic pendulum is as follows: the device is placed in a windy environment. Driven by the wind, the radial fan will rotate and drive the first chaotic pendulum main pendulum and the second chaotic pendulum main pendulum to rotate through the rotating main shaft, thereby driving the chaotic pendulum secondary pendulum to rotate. The rotor magnet fixed to the chaotic pendulum secondary pendulum will approach and move away from the stator magnet during the rotation process, and continuously generate an exciting force on the stator magnet. The generated exciting force will be further transmitted to the magnetic piezoelectric fixed beam and cause the magnetic piezoelectric fixed beam to vibrate. The piezoelectric sheet attached to the magnetic piezoelectric fixed beam will deform with the vibration of the fixed beam and output electrical energy. More specifically, when the wind speed in the environment is small, the fan speed is slow. For the magnetic single pendulum structure without a chaotic pendulum, when the rotor magnet approaches the stator magnet, the mutual repulsion between the magnets of the same pole will continue to increase. The increasing magnetic repulsion may generate a large magnetic resistance torque and stop the rotor from rotating. After adopting the magnetic chaotic pendulum structure, when the rotor magnet approaches the stator magnet, the increasing magnetic repulsion will cause the chaotic pendulum secondary pendulum to rotate in the opposite direction of the first chaotic pendulum main pendulum, so that the rotor magnet is far away from the stator magnet. The increase in the distance between the rotor magnet and the stator magnet will reduce the magnetic repulsion, thereby preventing the rotor magnet from stopping due to excessive magnetic resistance torque. When the wind speed in the environment gradually increases, the speed of the radial fan gradually increases. At this time, when the rotor magnet approaches the stator magnet, the speed will also increase, and the magnetic repulsion between the two will also increase faster. The rapidly increasing magnetic repulsion will cause the chaotic pendulum secondary pendulum to produce a more obvious and faster reversal movement. At this time, the chaotic pendulum secondary pendulum will quickly complete a circle of reversal movement before the first chaotic pendulum main pendulum rotates to a position away from the stator magnet, and approach the stator magnet again, thereby completing the second excitation of the stator magnet. Under this effect, the excitation frequency of the rotor magnet on the stator magnet will increase, thereby increasing the output power of the piezoelectric film; when the wind speed in the environment is high, the speed of the radial fan will further accelerate. When the speed of the wind-driven rotating mechanism increases, the centripetal force required for the rotor magnet to generate rotation is also increasing. When the speed is so fast that the centripetal force is greater than the maximum value of the repulsive force between the rotor magnet and the stator magnet, the magnetic repulsive force can no longer cause the secondary pendulum to produce reverse motion. At this time, the motion state of the wind-driven rotating mechanism is close to that of a simple pendulum, that is, the secondary pendulum of the chaotic pendulum stops rotating. At this time, there is no need for reverse motion to help the rotor magnet reduce the magnetic resistance torque. The distance between the rotor magnet and the stator magnet under the simple pendulum motion is closer, and the magnetic excitation force is greater, which helps to increase the output voltage.

[0042] In summary, this embodiment provides a piezoelectric wind energy capture device based on a magnetic chaotic pendulum, the piezoelectric wind energy capture device includes a base 01, a wind rotation mechanism and a power generation mechanism, the wind rotation mechanism is rotatably arranged on the base 01, and the power generation mechanism is fixed around the circumferential side of the base 01; the wind rotation mechanism includes a rotating main shaft 20, a radial fan group, a first chaotic pendulum main pendulum group and a chaotic pendulum secondary pendulum group, a first rotating hole is opened at the center of the base 01, a first bearing is installed on the first rotating hole, the rotating main shaft 20 is rotatably arranged at the center of the base 01 through the first bearing, the radial fan group and the first chaotic pendulum main pendulum group are fixed on the rotating main shaft 20 in sequence from top to bottom, and the chaotic pendulum secondary pendulum group is rotatably arranged on the first chaotic pendulum main pendulum group, that is, the The first chaotic pendulum main pendulum group and the chaotic pendulum secondary pendulum group rotate around the rotation main axis 20, and the chaotic pendulum secondary pendulum group also rotates around the first chaotic pendulum main pendulum group; a plurality of magnetic piezoelectric fixed beam groups are arranged in a mirror image along the center point of the base, and the power generation mechanism includes a plurality of stator magnets 31, a plurality of piezoelectric sheets 32 and a plurality of rotor magnets 33. The number of the magnetic piezoelectric fixed beam groups, the stator magnets 31, the piezoelectric sheets 32 and the rotor magnets 33 is one-to-one corresponding. The stator magnet 31 is arranged on the magnetic piezoelectric fixed beam group on the side facing the chaotic pendulum secondary pendulum group, the piezoelectric sheets 32 are arranged on the magnetic piezoelectric fixed beam group on the side facing away from the chaotic pendulum secondary pendulum group, and a plurality of the rotor magnets 33 are arranged on the chaotic pendulum secondary pendulum group, and the magnetic poles of the rotor magnets 33 and the stator magnets 31 are the same.In this embodiment, when the wind speed in the environment is relatively low, that is, when the wind speed is low, the wind force will drive the radial fan group on the rotating main shaft 20 to rotate, and drive the first chaotic pendulum main pendulum group and the chaotic pendulum secondary pendulum group on the rotating main shaft 20 to rotate. When the rotor magnet 33 on the chaotic pendulum secondary pendulum group approaches the stator magnet 31 on the magnetic piezoelectric fixed beam group, the mutual repulsion between the magnets of the same pole continues to increase, which will cause the rotor magnet 33 on the chaotic pendulum secondary pendulum group to rotate in the opposite direction of the radial fan group on the rotating main shaft 20, thereby causing the rotor magnet 33 to move away from the stator magnet 31. The increase in the distance between the rotor magnet 33 and the stator magnet 31 will reduce the magnetic repulsion force, thereby preventing the generation of an excessively large magnetic resistance torque that causes the rotor magnet 33 to stop rotating. When the wind speed in the environment gradually increases, the rotation speed of the radial fan group gradually becomes faster. At this time, when the rotor The speed at which the magnet 33 approaches the stator magnet 31 will also become faster, and the magnetic repulsion between the rotor magnet 33 and the stator magnet 31 will also increase faster. The rapidly increasing magnetic repulsion will cause the secondary pendulum to produce a more obvious and faster reversal movement. At this time, the chaotic pendulum secondary pendulum group will quickly complete a circle of reversal movement before the first chaotic pendulum main pendulum group turns to a position away from the stator magnet 31, and approach the stator magnet 31 again, thereby completing the second excitation of the stator magnet 31. Under this effect, the excitation frequency of the rotor magnet 33 on the stator magnet 31 will increase, thereby increasing the output power of the piezoelectric film 32. This embodiment uses stator magnets and rotor magnets for excitation, which is non-contact, thereby ensuring that the piezoelectric wind energy capture device of this embodiment is not easily damaged.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A piezoelectric wind energy capture device based on a magnetic chaotic pendulum, characterized in that: The piezoelectric wind energy capture device comprises: Pedestal; A wind-driven rotating mechanism, the wind-driven rotating mechanism comprising a rotating main shaft, a radial fan group, a first chaotic pendulum main pendulum group and a chaotic pendulum secondary pendulum group, the rotating main shaft is rotatably arranged on the base, the radial fan group and the first chaotic pendulum main pendulum group are both fixedly arranged on the rotating main shaft, and the chaotic pendulum secondary pendulum group is rotatably arranged on the first chaotic pendulum main pendulum group; A power generation mechanism, the power generation mechanism comprises a plurality of stator magnets, a plurality of piezoelectric sheets and a plurality of rotor magnets, the number of the stator magnets, the piezoelectric sheets and the rotor magnets corresponds to each other, the stator magnets are arranged on the side of the base facing the chaotic pendulum group, the piezoelectric sheets are arranged on the side of the base facing away from the chaotic pendulum group, and a plurality of the rotor magnets are arranged on the chaotic pendulum group; wherein the magnetic poles of the rotor magnets and the stator magnets are opposite to each other and have the same poles; The first chaotic pendulum main pendulum group includes a plurality of first chaotic pendulum main pendulum rods, and the plurality of chaotic pendulum main pendulum rods are evenly fixed on the rotating main shaft; The chaotic pendulum secondary pendulum group includes a plurality of rotating sleeves and a plurality of chaotic pendulum secondary pendulum rods. The plurality of rotating sleeves are rotatably arranged on a plurality of the first chaotic pendulum main pendulum rods respectively. The chaotic pendulum secondary pendulum rods are fixedly arranged on the rotating sleeves. The rotor magnet is arranged on the chaotic pendulum secondary pendulum rods.

2. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 1 is characterized in that: The radial fan group includes a fan support tube and a plurality of radial fans. The fan support tube is fixedly arranged on the rotating main shaft, and the plurality of radial fans are evenly distributed on the fan support tube.

3. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 2 is characterized in that: The cross section of the radial fan is arc-shaped.

4. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 1 is characterized in that: The wind-driven rotating mechanism also includes a second chaotic pendulum main pendulum group, which includes a plurality of extension shafts and a plurality of second chaotic pendulum main pendulum rods. One end of the extension shaft is connected to the first chaotic pendulum main pendulum rod, and the other end is connected to the second chaotic pendulum main pendulum rod.

5. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 3 is characterized in that: A plurality of magnetic piezoelectric clamped beam groups are arranged along the center point of the base in a mirror image, and the magnetic piezoelectric clamped beam groups include: A first fixing bracket, wherein the first fixing bracket is disposed on the base; a second fixing bracket, the second fixing bracket being arranged on the base; A magnetic piezoelectric clamped beam, one end of which is connected to the first fixing bracket, and the other end of which is connected to the second fixing bracket.

6. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 1, characterized in that: A plurality of first chaotic pendulum main pendulum groups are correspondingly arranged on the rotating main shaft, and each first chaotic pendulum main pendulum group is correspondingly arranged with a chaotic pendulum secondary pendulum group and a power generation mechanism.

7. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 1, characterized in that: A plurality of first chaotic pendulum main pendulum groups are correspondingly arranged on the rotating main shaft, and each first chaotic pendulum main pendulum group is correspondingly arranged with a power generation mechanism and a plurality of chaotic pendulum secondary pendulum groups.

8. The piezoelectric wind energy capture device based on a magnetic chaotic pendulum according to claim 1 is characterized in that: A first chaotic pendulum main pendulum group is arranged on the rotating main shaft, and a plurality of chaotic pendulum secondary pendulum groups and a power generation mechanism are arranged on the first chaotic pendulum main pendulum group.

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