A hula hoop-type friction nano-power generation device

Abstract

The hula hoop-type triboelectric nanometer power generation device disclosed in the present invention relates to the field of power generation equipment and includes a first rolling element, a first friction layer, a first electrode layer, and an annular housing. The first friction layer and the first electrode layer are arc-shaped or annular. The housing has an annular first track groove. The first friction layer and the first electrode layer are disposed within the first track groove. The outer surface of the first electrode layer is fixedly connected to the outer wall of the first track groove of the housing, and the inner surface of the first electrode layer is in contact with and fixedly connected to the outer surface of the first friction layer. The outer wall of the first rolling element includes an annular second friction layer and a second electrode layer, which are arranged from the outside to the inside and contact and fixedly connected to each other. The first rolling element is disposed within the first track groove. The housing can rotate around an external component under the action of an external force. When the housing rotates, the first rolling element can roll along the first track groove under the action of centrifugal force and / or external force, and the outer surface of the second friction layer can contact the inner surface of the first friction layer. The second friction layer and the first friction layer have different triboelectric electrode sequences. The device has a high power generation capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation equipment, and in particular to a hula hoop type friction nanometer power generation device. Background Art

[0002] Energy has always been a major challenge in human development. To address this, a variety of power generation methods have been proposed, including those utilizing the piezoelectric effect, electromagnetic generation, and triboelectric generation. Among them, triboelectric nanogenerators (TNGs) generate electricity based on the triboelectric effect and electrostatic induction. Triboelectric generation modes include sliding, stand-alone, contact-separation, and single-electrode types, and have a wide range of applications.

[0003] Existing friction nano-power generation mostly converts mechanical motion into reciprocating motion in the horizontal plane of the friction power generation component, such as the friction nano-generator, electronic fishing float and method for preparing the friction nano-generator provided by patent CN113630034A. It is through external force (such as the force of the fishing line being pulled) acting on the friction slider. When the friction slider slides relative to the friction dielectric layer under the action of external force to generate relative friction, negative charge is generated on the surface of the friction dielectric layer. The negative charge is transferred between the first electrode and the second electrode to achieve local charge balance. At this time, an induced current is generated between the first electrode and the second electrode. The friction dielectric layer in this patent is a plane, that is, the existing friction nano-power generation device lacks a structure that can convert low-frequency mechanical motion into high-frequency mechanical motion, and the power generation capacity is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a hula hoop-type friction nano-power generation device to solve the problems existing in the above-mentioned prior art. It can convert external low-frequency movements such as human body shaking into high-frequency movements of the friction power generation component, thereby improving the power generation capacity.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a hula hoop-type friction nano-power generation device, comprising a first rolling body, a first friction layer, a first electrode layer and an annular shell, wherein the first friction layer and the first electrode layer are both arc-shaped or annular, and the shell has an annular first track groove, wherein the first friction layer and the first electrode layer are both arranged in the first track groove, the outer surface of the first electrode layer is fixedly connected to the outer wall of the first track groove of the shell, and the inner surface of the first electrode layer is in contact with and fixedly connected to the outer surface of the first friction layer, the outer wall of the first rolling body comprises an annular second friction layer and an annular second electrode layer, which are arranged from the outside to the inside and are in contact with each other and fixedly connected, the first rolling body is used to be arranged in the first track groove, the shell can rotate around the external component under the action of external force, and when the shell rotates, the first rolling body can roll along the first track groove under the action of centrifugal force and / or external force, and the outer surface of the second friction layer can be in contact with the inner surface of the first friction layer, and the second friction layer and the first friction layer have different friction electrode sequences.

[0007] Preferably, it further includes a second rolling body, a third electrode layer, a fourth electrode layer and an annular third friction layer, the third electrode layer and the fourth electrode layer are both arc-shaped, an annular partition is fixedly connected to the cavity of the shell, the partition divides the cavity of the shell into the first track groove and the annular second track groove, the third friction layer, the third electrode layer and the fourth electrode layer are all arranged in the second track groove, the inner surface of the third electrode layer and the inner surface of the fourth electrode layer are both in contact with and fixedly connected to the outer surface of the third friction layer, the outer surface of the third electrode and the outer surface of the fourth electrode are both fixedly connected to the outer wall of the second track groove, the third electrode and the fourth electrode do not contact each other, the second rolling body is used to be arranged in the second track groove, when the shell rotates, the second rolling body can roll along the second track groove under the action of centrifugal force and the outer surface of the second rolling body can contact the inner surface of the third friction layer, the outer surface of the second rolling body and the third friction layer have different friction electrode sequences.

[0008] Preferably, it also includes a counterweight component and a connecting device, the first track groove is arranged on the outside of the second track groove, an annular notch is provided on the outer wall of the shell, the counterweight component is arranged on the outside of the shell, one end of the connecting device is fixedly connected to the counterweight component, and the other end of the connecting device can pass through the annular notch and extend into the second track groove and be fixedly connected to the first rolling body, the length of the annular notch along the axis direction of the shell is smaller than the length of the first rolling body along the axis direction of the shell, and when the shell rotates, the counterweight component can drive the connecting device to rotate along the annular notch under the action of centrifugal force.

[0009] Preferably, the connecting device includes a guide component, a support component and a swing rope, the guide component and the swing rope are both arranged on the outside of the shell, one end of the swing rope is fixedly connected to the counterweight component, the other end of the swing rope is fixedly connected to one side of the guide component, one end of the support component is fixedly connected to the other side of the guide component, the other end of the support component can pass through the annular gap into the second track groove and be fixedly connected to the first rolling body, the side surface of the support frame close to the first rolling body is a guide surface, and when the connecting device rotates along the annular gap, the guide surface can be slidably connected to the outer wall of the shell, and the axis of the outer wall of the first track groove is collinear with the axis of the outer wall of the shell.

[0010] Preferably, the guide surface is an arc surface, and the diameter of the guide surface is the same as the outer diameter of the shell.

[0011] Preferably, the first rolling body is a bearing, the inner ring of the bearing is fixedly connected to the support component, the outer ring of the bearing includes an annular second friction layer and an annular second electrode layer that are arranged from the outside to the inside and are in contact with each other and fixedly connected, the axis of the first rolling body is parallel to the axis of the shell, and the second rolling body is spherical.

[0012] Preferably, the shell is a hula hoop.

[0013] Preferably, it also includes a fourth friction layer and a fifth electrode layer, the fourth friction layer and the fifth electrode layer are both arc-shaped or annular, the fourth friction layer and the fifth electrode layer are both arranged in the first track groove, the shell has a first track groove inner wall, the first track groove inner wall and the support component are respectively located on both sides of the bearing, one side surface of the fifth electrode layer in the thickness direction is fixedly connected to the first track groove inner wall, the other side surface of the fifth electrode layer is in contact with and fixedly connected to the one side surface of the fourth friction layer in the thickness direction, when the first rolling body rolls along the first track groove, the outer side surface of the second friction layer can contact the other side surface of the fourth friction layer, and the second friction layer and the fourth friction layer have different friction electrode sequences.

[0014] Preferably, it also includes a sixth electrode layer, a seventh electrode layer and an annular fifth friction layer, the sixth electrode layer and the seventh electrode layer are both arc-shaped, the sixth electrode layer, the seventh electrode layer and the fifth friction layer are all arranged in the second track groove, the shell has an inner wall in the axial direction of the shell having the inner wall of the second track groove, and the inner wall of the second track groove and the inner wall of the first track are located at the same end of the bearing, one side surface of the sixth electrode layer in the thickness direction and one side surface of the seventh electrode layer in the thickness direction are both fixedly connected to the inner wall of the second track groove, the other side surface of the sixth electrode layer and the other side surface of the seventh electrode layer are both in contact with and fixedly connected to one side surface of the fifth friction layer, the sixth electrode and the seventh electrode do not contact each other, and when the shell rotates, the outer surface of the second rolling body can contact the other side surface of the fifth friction layer, and the outer surface of the second rolling body and the fifth friction layer have different friction electrode sequences.

[0015] Preferably, the third electrode layer and the fourth electrode layer are symmetrically arranged with respect to the axial cross-section of the shell, and the sixth electrode layer and the seventh electrode layer are symmetrically arranged with respect to the axial cross-section of the shell.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] In the hula hoop-type friction nano-power generation device provided by the present invention, the shell can rotate around the external component under the action of external force. When the shell rotates, the first rolling body can roll along the first track groove under the action of centrifugal force and / or external force, and the outer surface of the second friction layer can contact the inner surface of the first friction layer. The second friction layer and the first friction layer have different friction electrode sequences. When the housing is shaken by an external component and rotated about the external component, the first rolling element rolls along the first track groove. Because the second friction layer and the first friction layer have different degrees of attraction to electric charge, when the two contact and slide and rub, charge transfer occurs between the second friction layer and the portion of the first friction layer in contact with the second friction layer. For example, the second friction layer loses electrons and the first friction layer gains electrons. That is, when the first rolling element is in a first position, the second friction layer has a positive net charge, and the portion of the first friction layer in contact with the second friction layer has a negative net charge. When the first rolling element rolls to a second position, the portion of the first friction layer corresponding to the first position still has a negative net charge for a short period of time. When the first electrode and the second electrode are connected by a wire, in order to neutralize the negative net charge on the first friction layer corresponding to the first position, electrons on the first electrode flow to the second electrode, thereby generating current. As the first rolling element cyclically rolls, a continuous current is generated between the first and second electrodes, achieving power generation. The hula hoop-type triboelectric nanometer power generation device provided by the present invention can convert low-frequency motion such as human body shaking into high-frequency motion of the first rolling element, thereby improving power generation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of the hula hoop-type friction nano-power generation device provided by the present invention;

[0020] Figure 2 A schematic diagram of the structure of the hula hoop-type friction nano-power generation device provided by the present invention (with the shell opened);

[0021] Figure 3 A schematic structural diagram of the counterweight component, connecting device and first rolling element provided by the present invention;

[0022] Figure 4 An exploded view of the second rolling element, the third electrode layer, the fourth electrode layer, and the third friction layer provided by the present invention;

[0023] Figure 5An exploded view of the first friction layer and the first electrode layer provided by the present invention;

[0024] Figure 6 A schematic structural diagram of the first electrode layer, the fifth electrode layer, the first friction layer and the fourth friction layer provided by the present invention;

[0025] Figure 7 A schematic diagram of the power generation principle of the power generation assembly in the second track groove provided by the present invention;

[0026] Figure 8 A schematic diagram of the power generation principle of the power generation assembly in the first track groove provided by the present invention;

[0027] In the figure: 100, hula hoop type friction nano power generation device; 1, first rolling element; 101, second friction layer; 102, second electrode layer; 2, first friction layer; 3, first electrode layer; 4, shell; 401, first track groove; 402, outer wall of first track groove; 403, second track groove; 404, annular notch; 405, inner wall of first track groove; 406, inner wall of second track groove; 5, second rolling element; 6, third electrode layer; 7, fourth electrode layer; 8, third friction layer; 9, partition; 10, counterweight component; 11, connecting device; 111, guide component; 112, supporting component; 113, pendulum rope; 114, guide surface; 12, fourth friction layer; 13, fifth electrode layer; 14, sixth electrode layer; 15, seventh electrode layer; 16, fifth friction layer. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The purpose of the present invention is to provide a hula hoop-type friction nano-power generation device to solve the problems existing in the above-mentioned prior art. It can convert external low-frequency movements such as human body shaking into high-frequency movements of the friction power generation component, thereby improving the power generation capacity.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1-8As shown, the present invention provides a hula hoop type friction nano power generation device 100, comprising a first rolling body 1, a first friction layer 2, a first electrode layer 3 and an annular shell 4, wherein the first friction layer 2 and the first electrode layer 3 are both arc-shaped or annular, preferably, the first friction layer 2 and the first electrode layer 3 are both annular, the shell 4 has an annular first track groove 401, the first friction layer 2 and the first electrode layer 3 are both arranged in the first track groove 401, the outer surface of the first electrode layer 3 is fixedly connected to the outer wall 402 of the first track groove of the shell 4, the inner surface of the first electrode layer 3 is in contact with and fixedly connected to the outer surface of the first friction layer 2, preferably, the inner surface of the first electrode layer 3 is in contact with the outer surface of the first friction layer 2 The side surfaces are in complete contact. The outer wall of the first rolling element 1 includes an annular second friction layer 101 and an annular second electrode layer 102, arranged from the outside inward, which are in contact and fixedly connected. Preferably, the entire inner surface of the second electrode layer 102 is in contact with the outer surface of the second friction layer 101. The first rolling element 1 is intended to be disposed within the first track groove 401. The housing 4 is capable of rotating about the external component under the action of an external force. When the housing 4 rotates, the first rolling element 1 can roll along the first track groove 401 under the action of centrifugal force and / or external force, and the outer surface of the second friction layer 101 can contact the inner surface of the first friction layer 2. The second friction layer 101 and the first friction layer 2 have different triboelectric sequences. It should be noted that when the first friction layer 2 and the first electrode layer 3 are arc-shaped, both ends of the first friction layer 2 and the first electrode layer 3 smoothly transition to the outer wall 402 of the first track groove, ensuring that the first rolling element 1 can roll along the first track groove 401 under the action of centrifugal force and / or external force.

[0032] When the housing 4 is shaken by an external component and rotated about the external component, the first rolling element 1 rolls along the first track groove 401. Due to the different degrees of attraction to electric charge between the second friction layer 101 and the first friction layer 2, when the two contact and slide against each other, charge transfer occurs between the second friction layer 101 and the portion of the first friction layer 2 in contact with the second friction layer 101. For illustration, the second friction layer 101 loses electrons and the first friction layer 2 gains electrons. Specifically, when the first rolling element 1 is in the first position, the second friction layer 101 carries a positive net charge, and the portion of the first friction layer 2 in contact with the second friction layer 101 carries a negative net charge. When the first rolling element 1 rolls to the second position, the portion of the first friction layer 2 corresponding to the first position briefly retains a negative net charge. When a first electrode and a second electrode are connected by a wire, electrons on the first electrode flow toward the second electrode to neutralize the negative net charge on the first friction layer 2 corresponding to the first position, thereby generating current. As the first rolling element 1 cyclically rolls, a continuous current is generated between the first and second electrodes, achieving power generation. The hula hoop-type friction nano-power generation device 100 provided by the present invention can convert low-frequency motion of the external environment, such as human body shaking, into high-frequency motion of the first rolling element 1, thereby improving the power generation capacity.

[0033] like Figure 4 As shown, the hula hoop type friction nano power generation device 100 provided by the present invention also includes a second rolling body 5, a third electrode layer 6, a fourth electrode layer 7 and an annular third friction layer 8, the third electrode layer 6 and the fourth electrode layer 7 are both arc-shaped, and an annular partition 9 is fixedly connected to the cavity of the shell 4, and the partition 9 divides the cavity of the shell 4 into a first track groove 401 and an annular second track groove 403. The third friction layer 8, the third electrode layer 6 and the fourth electrode layer 7 are all arranged in the second track groove 403, and the inner surface of the third electrode layer 6 and the inner surface of the fourth electrode layer 7 are The surfaces are in contact with and fixedly connected to the outer surface of the third friction layer 8. The outer surfaces of the third electrode and the outer surfaces of the fourth electrode are both fixedly connected to the outer wall of the second track groove 403. The third electrode and the fourth electrode do not contact each other. The second rolling body 5 is used to be arranged in the second track groove 403. When the housing 4 rotates, the second rolling body 5 can roll along the second track groove 403 under the action of centrifugal force and the outer surface of the second rolling body 5 can contact the inner surface of the third friction layer 8. The outer surface of the second rolling body 5 and the third friction layer 8 have different friction electrode sequences. Figure 6As shown, due to the different degrees of attraction of the second rolling element 5 and the third friction layer 8 to electric charges, when the second rolling element 5 is disposed opposite the third electrode layer 6 and contacts and slides with the third friction layer 8, negative charge is transferred from the surface of the material with a more positive polarity in the triboelectric electrode sequence to the surface of the material with a more negative polarity in the triboelectric electrode sequence. Taking the example of the second rolling element 5 losing electrons and the third friction layer 8 gaining electrons when the second rolling element 5 contacts the third friction layer 8, when the outer surface of the second rolling element 5 has a positive net charge and the inner wall of the third friction layer 8 has a negative net charge equal to its charge density, when the first electrode and the second electrode are connected by a wire, electrons on the fourth electrode layer 7 flow through the wire to the third electrode layer 6 to neutralize the negative net charge on the third friction layer 8, thereby generating an electric current. Similarly, when the second rolling element 5 moves to the inner wall of the third friction layer 8 corresponding to the fourth electrode layer 7, electrons on the third electrode layer 6 flow through the wire to the fourth electrode layer 7, generating an electric current. As the rotation process proceeds, the charge continues to flow, thereby converting mechanical energy into electrical energy. The hula hoop-type friction nano-power generation device 100 provided by the present invention can convert low-frequency external motions such as human body shaking into high-frequency motions of the second rolling body 5, and has a high power generation capacity; at the same time, two sets of power generation components are set at the same time, further improving the power generation efficiency.

[0034] As a preferred embodiment, the shell 4 is a hula hoop.

[0035] like Figure 3 As shown, the hula hoop-type triboelectric nanometer power generation device 100 provided by the present invention also includes a counterweight component 10 and a connecting device 11. The first track groove 401 is arranged outside the second track groove 403. An annular notch 404 is provided on the outer wall of the housing 4. The counterweight component 10 is arranged outside the housing 4. One end of the connecting device 11 is fixedly connected to the counterweight component 10. The other end of the connecting device 11 can pass through the annular notch 404 and extend into the second track groove 403 and be fixedly connected to the first rolling element 1. The length of the annular notch 404 along the axis of the housing 4 is less than the length of the first rolling element 1 along the axis of the housing 4, ensuring that the first rolling element 1 can roll within the first track groove 401 without falling off. When the housing 4 rotates, the counterweight component 10 can drive the connecting device 11 to rotate along the annular notch 404 under the action of centrifugal force. The counterweight component 10 is preferably a pendulum ball. When the body or limbs swing, causing the housing 4 to rotate around the body or limbs, the counterweight component 10 rotates. Furthermore, the swinging ball, via the connecting device 11, drives the first rolling element 1 to rotate 360° within the first track groove 401. The counterweight component 10 improves the fit of the housing 4 to the waist, etc., allowing for better and faster rotation of the housing 4, thereby improving power generation efficiency.

[0036] like Figure 3As shown, the connecting device 11 includes a guide component 111, a support component 112 and a swing rope 113. The guide component 111 and the swing rope 113 are both arranged on the outside of the shell 4. One end of the swing rope 113 is fixedly connected to the counterweight component 10, and the other end of the swing rope 113 is fixedly connected to one side of the guide component 111. One end of the support component 112 is fixedly connected to the other side of the guide component 111. The other end of the support component 112 can pass through the annular gap 404 and extend into the second track groove 403 and be fixedly connected to the first rolling body 1. The side surface of the support frame close to the first rolling body 1 is a guide surface 114. When the connecting device 11 rotates along the annular gap 404, the guide surface 114 can be slidably connected to the outer wall of the shell 4. The axis of the outer wall 402 of the first track groove is collinear with the axis of the outer wall of the shell 4. It should be noted that the guide surface 114 can cover the portion of the annular notch 404 that is opposite the guide surface 114 along the axial direction of the housing 4. That is, the maximum dimension of the guide surface 114 along the axial direction of the housing 4 is greater than the maximum dimension of the annular notch 404 along the axial direction of the housing 4, ensuring that the guide surface 114 can be slidably connected to the outer wall of the housing 4. The provision of the guide surface 114 enables the first rolling element 1 to slide better, which is conducive to improving power generation efficiency.

[0037] As a preferred embodiment, the guide surface 114 is an arc surface, and the diameter of the guide surface 114 is the same as the outer diameter of the housing 4 .

[0038] As a preferred embodiment, the first rolling element 1 is a bearing, the inner ring of which is fixedly connected to the support component 112. The outer ring of the bearing includes an annular second friction layer 101 and an annular second electrode layer 102, which are arranged from the outside inward and contact each other and are fixedly connected. The axis of the first rolling element 1 is parallel to the axis of the housing 4, and the second rolling element 5 is spherical. It should be noted that the first rolling element 1 is not limited to the form of a bearing and can also be spherical, as long as it can ensure that the first rolling element 1 can roll within the first track groove 401 and the outer surface of the second rolling element 5 can contact the inner surface of the third friction layer 8. The sliding friction between the bearing and the outer wall 402 of the first track groove reduces frictional resistance, improves energy conversion efficiency, reduces material loss, and enhances the operational stability and reliability of the device.

[0039] As a preferred embodiment, the hula hoop-type friction nano-power generation device 100 provided by the present invention also includes a fourth friction layer 12 and a fifth electrode layer 13. The fourth friction layer 12 and the fifth electrode layer 13 are both arc-shaped or annular. The fourth friction layer 12 and the fifth electrode layer 13 are both arranged in the first track groove 401. The shell 4 has a first track groove inner wall 405. The first track groove inner wall 405 and the support component 112 are respectively located on both sides of the bearing. One side surface of the fifth electrode layer 13 in the thickness direction is fixedly connected to the first track groove inner wall 405, and the other side surface of the fifth electrode layer 13 is in contact with and fixedly connected to one side surface of the fourth friction layer 12 in the thickness direction. When the first rolling body 1 rolls along the first track groove 401, the outer surface of the second friction layer 101 can contact the other side surface of the fourth friction layer 12. The second friction layer 101 and the fourth friction layer 12 have different friction electrode sequences. As a preferred embodiment, the other surface of the fifth electrode layer 13 is in complete contact with one surface of the fourth friction layer 12 in the thickness direction. Both the fourth friction layer 12 and the fifth electrode layer 13 are annular. The fourth friction layer 12 is integrally formed with the first friction layer 2, and the fifth electrode layer 13 is integrally formed with the first electrode layer 3. The provision of the fourth friction layer 12 and the fifth electrode layer 13 helps increase the area of ​​the friction layer in contact with the second friction layer 101, thereby improving power generation efficiency.

[0040] As a preferred embodiment, the hula hoop-type friction nano-power generation device 100 provided by the present invention also includes a sixth electrode layer 14, a seventh electrode layer 15 and an annular fifth friction layer 16. The sixth electrode layer 14 and the seventh electrode layer 15 are both arc-shaped. The sixth electrode layer 14, the seventh electrode layer 15 and the fifth friction layer 16 are all arranged in the second track groove 403. The shell 4 has an inner wall in the axial direction of the shell 4 having a second track groove inner wall 406, and the second track groove inner wall 406 and the first track inner wall are located at the same end of the bearing. One side surface of the sixth electrode layer 14 in the thickness direction and one side surface of the seventh electrode layer 15 in the thickness direction are both fixedly connected to the second track groove inner wall 406. The other side surface of the sixth electrode layer 14 and the other side surface of the seventh electrode layer 15 are both in contact with and fixedly connected to one side surface of the fifth friction layer 16. The sixth electrode and the seventh electrode do not contact each other. When the shell 4 rotates, the outer surface of the second rolling element 5 can contact the other side surface of the fifth friction layer 16. The outer surface of the second rolling element 5 and the fifth friction layer 16 have different friction electrode sequences. As a preferred embodiment, the other side surface of the sixth electrode layer 14 and the other side surface of the seventh electrode layer 15 are both completely in contact with one side surface of the fifth friction layer 16. The sixth electrode layer 14 is integrally formed with the third electrode layer 6, the seventh electrode layer 15 is integrally formed with the fourth electrode layer 7, and the fifth friction layer 16 is integrally formed with the third friction layer 8. The provision of the fifth friction layer 16, the sixth electrode layer 14, and the seventh electrode layer 15 helps increase the area of ​​the friction layer in contact with the outer surface of the second rolling element 5, thereby improving power generation efficiency.

[0041] As a preferred embodiment, the third electrode layer 6 and the fourth electrode layer 7 are symmetrically arranged with respect to the axial cross-section of the housing 4 , and the sixth electrode layer 14 and the seventh electrode layer 15 are symmetrically arranged with respect to the axial cross-section of the housing 4 .

[0042] As a preferred embodiment, microstructures are provided on the outer surfaces of the first friction layer 2, the second friction layer 101, the third friction layer 8, the fourth friction layer 12, the fifth friction layer 16 and the second rolling body 5. The microstructures include array structures of any combination of nanowires, nanotubes, nanoparticles, nanorods, nanoflowers, nanogrooves, micron grooves, nanocones, microcones, nanospheres and micron spherical structures, thereby providing a larger contact area, thereby generating more friction charges on the contact surface and enhancing the output electrical energy.

[0043] As a preferred embodiment, the triboelectric charge on the first friction layer 2, the second friction layer 101, the third friction layer 8, the fourth friction layer 12, the fifth friction layer 16, and the outer surface of the second rolling element 5 is distributed only on the friction layer surface. Furthermore, the friction layer has excellent insulation properties, so no charge leakage occurs within a cycle. Ideally, charge loss can be ignored, and the amount of charge transferred between the first electrode layer 3 and the second electrode layer 102 is approximately equal to the amount of charge separated at any sliding position.

[0044] As a preferred embodiment, the second friction layer 101 and the first friction layer 2 are made of materials with a large difference in electron gain and loss capabilities; the outer surface of the second rolling element 5 and the third friction layer 8 are made of materials with a large difference in electron gain and loss capabilities; the second friction layer 101 and the fourth friction layer 12 are made of materials with a large difference in electron gain and loss capabilities; the outer surface of the second rolling element 5 and the fifth friction layer 16 are made of materials with a large difference in electron gain and loss capabilities.

[0045] As a preferred embodiment, the housing 4 , the counterweight component 10 , the guide component 111 , the support component 112 and the swing rope 113 are all made of insulating materials, such as resin.

[0046] This invention combines triboelectric nanogenerators with a hula hoop, utilizing the hoop's rotational properties to collect the mechanical energy generated by its circumferential rotation and convert it into electrical energy. This retains the high-voltage output advantage of a triboelectric nanogenerator while converting the low-frequency motion of the human body into high-frequency motion of the first and second rolling elements 1 and 5, thereby overcoming the low current density output disadvantage of a triboelectric nanogenerator and effectively improving energy conversion efficiency. Furthermore, since the user drives the hula hoop to generate electricity using its rotational mechanical energy, this invention offers the advantages of low cost and ease of manufacture.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A hula hoop-type friction nano-power generation device, characterized by: The invention comprises a first rolling element, a first friction layer, a first electrode layer and an annular shell, wherein the first friction layer and the first electrode layer are both arc-shaped or annular, the shell having an annular first track groove, the first friction layer and the first electrode layer are both arranged in the first track groove, the outer surface of the first electrode layer is fixedly connected to the outer wall of the first track groove of the shell, the inner surface of the first electrode layer is in contact with and fixedly connected to the outer surface of the first friction layer, the outer wall of the first rolling element comprises an annular second friction layer and an annular second electrode layer arranged from the outside to the inside, which are in contact with each other and fixedly connected, the first rolling element is used to be arranged in the first track groove, the shell can rotate around the external component under the action of external force, when the shell rotates, the first rolling element can roll along the first track groove under the action of centrifugal force and / or external force, and the outer surface of the second friction layer can contact the inner surface of the first friction layer, and the second friction layer and the first friction layer have different friction electrode sequences; The invention also includes a second rolling body, a third electrode layer, a fourth electrode layer and an annular third friction layer, wherein the third electrode layer and the fourth electrode layer are both arc-shaped, and an annular partition is fixedly connected to the cavity of the shell, and the partition divides the cavity of the shell into the first track groove and the annular second track groove. The third friction layer, the third electrode layer and the fourth electrode layer are all arranged in the second track groove, and the inner surface of the third electrode layer and the inner surface of the fourth electrode layer are both in contact with and fixedly connected to the outer surface of the third friction layer. The outer surface of the third electrode and the outer surface of the fourth electrode are both fixedly connected to the outer wall of the second track groove, and the third electrode and the fourth electrode do not contact each other. The second rolling body is used to be arranged in the second track groove. When the shell rotates, the second rolling body can roll along the second track groove under the action of centrifugal force and the outer surface of the second rolling body can contact the inner surface of the third friction layer. The outer surface of the second rolling body and the third friction layer have different friction electrode sequences.

2. The hula hoop-type friction nano-power generation device according to claim 1, characterized in that: It also includes a counterweight component and a connecting device, the first track groove is arranged on the outside of the second track groove, an annular notch is provided on the outer wall of the shell, the counterweight component is arranged on the outside of the shell, one end of the connecting device is fixedly connected to the counterweight component, and the other end of the connecting device can pass through the annular notch and extend into the second track groove and be fixedly connected to the first rolling body, the length of the annular notch along the axis direction of the shell is smaller than the length of the first rolling body along the axis direction of the shell, and when the shell rotates, the counterweight component can drive the connecting device to rotate along the annular notch under the action of centrifugal force.

3. The hula hoop-type friction nano-power generation device according to claim 2, characterized in that: The connecting device includes a guide component, a support component and a swing rope, the guide component and the swing rope are both arranged on the outside of the shell, one end of the swing rope is fixedly connected to the counterweight component, the other end of the swing rope is fixedly connected to one side of the guide component, one end of the support component is fixedly connected to the other side of the guide component, the other end of the support component can pass through the annular gap into the second track groove and be fixedly connected to the first rolling body, the side surface of the support component close to the first rolling body is a guide surface, when the connecting device rotates along the annular gap, the guide surface can be slidably connected to the outer wall of the shell, and the axis of the outer wall of the first track groove is collinear with the axis of the outer wall of the shell.

4. The hula hoop-type friction nano-power generation device according to claim 3, characterized in that: The guide surface is an arc surface, and the diameter of the guide surface is the same as the outer diameter of the shell.

5. The hula hoop-type friction nano-power generation device according to claim 3, characterized in that: The first rolling body is a bearing, the inner ring of the bearing is fixedly connected to the support component, the outer ring of the bearing includes an annular second friction layer and an annular second electrode layer that are arranged from the outside to the inside and are in contact with each other and fixedly connected, the axis of the first rolling body is parallel to the axis of the shell, and the second rolling body is spherical.

6. The hula hoop-type friction nano-power generation device according to claim 1, characterized in that: The shell is a hula hoop.

7. The hula hoop-type friction nano-power generation device according to claim 5, characterized in that: It also includes a fourth friction layer and a fifth electrode layer, both of which are arc-shaped or annular, and both of which are arranged in the first track groove. The shell has an inner wall of the first track groove, and the inner wall of the first track groove and the support component are respectively located on both sides of the bearing. One side surface of the fifth electrode layer in the thickness direction is fixedly connected to the inner wall of the first track groove, and the other side surface of the fifth electrode layer is in contact with and fixedly connected to one side surface of the fourth friction layer in the thickness direction. When the first rolling body rolls along the first track groove, the outer surface of the second friction layer can contact the other side surface of the fourth friction layer, and the second friction layer and the fourth friction layer have different friction electrode sequences.

8. The hula hoop-type triboelectric nano-power generation device according to claim 7, characterized in that: It also includes a sixth electrode layer, a seventh electrode layer and an annular fifth friction layer, the sixth electrode layer and the seventh electrode layer are both arc-shaped, the sixth electrode layer, the seventh electrode layer and the fifth friction layer are all arranged in the second track groove, the shell has an inner wall of the second track groove in the axial direction of the shell, and the second track groove inner wall and the first track inner wall are located at the same end of the bearing, one side surface of the sixth electrode layer in the thickness direction and one side surface of the seventh electrode layer in the thickness direction are both fixedly connected to the second track groove inner wall, the other side surface of the sixth electrode layer and the other side surface of the seventh electrode layer are both in contact with and fixedly connected to one side surface of the fifth friction layer, the sixth electrode and the seventh electrode do not contact each other, and when the shell rotates, the outer surface of the second rolling body can contact the other side surface of the fifth friction layer, and the outer surface of the second rolling body and the fifth friction layer have different friction electrode sequences.

9. The hula hoop-type triboelectric nano-power generation device according to claim 8, characterized in that: The third electrode layer and the fourth electrode layer are symmetrically arranged with respect to the axial cross-section of the shell, and the sixth electrode layer and the seventh electrode layer are symmetrically arranged with respect to the axial cross-section of the shell.

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