CN215860590U

CN215860590U - Ocean energy collecting device

Info

Publication number: CN215860590U
Application number: CN202121825661.XU
Authority: CN
Inventors: 王中林; 逄昊; 蒋涛
Original assignee: Kosi Technology Wenzhou Research Institute; Beijing Institute of Nanoenergy and Nanosystems
Current assignee: Beijing Institute of Nanoenergy and Nanosystems
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-02-18
Anticipated expiration: 2031-08-06

Abstract

The application discloses ocean energy collection device, including casing and rotating assembly. The casing is hollow columnar structure, and rotating assembly sets up inside the casing, and rotating assembly can use the casing axis to rotate as the pivot. The inner wall of the shell is provided with a brush and an electrode assembly, the brush and the electrode assembly are arranged at intervals in the circumferential direction of the shell, the electrode assembly comprises at least one first electrode layer and at least one second electrode layer, and the at least one first electrode layer and the at least one second electrode layer are alternately arranged along the circumferential direction of the shell. The side of the rotating assembly facing the inner wall of the shell is provided with a dielectric assembly, the dielectric assembly comprises at least one dielectric layer, when the rotating assembly rotates, the dielectric layer and the brush are in friction electrification, and the dielectric layer, the first electrode layer and the second electrode layer are subjected to electrostatic induction. The application of ocean energy collection device can collect the water wave energy at the surface of water, and the mechanical energy of runner assembly turns into the electric energy under the water wave impact, realizes planting the collection of ocean energy, and the durability is higher, and electric output performance is stronger.

Description

Ocean energy collecting device

Technical Field

The application relates to the technical field of energy, especially, relate to an ocean energy collection device.

Background

Reducing carbon emissions to achieve carbon neutralization is critical to environmental protection, and developing clean renewable energy is an effective means to achieve this goal. The ocean contains rich and clean renewable blue energy sources, including wave energy, tidal energy and the like. At present, the conversion of sea wave energy into electric energy mainly depends on an electromagnetic generator, however, the energy conversion efficiency of the electromagnetic generator under low-frequency water waves is very low, and the practical application of the electromagnetic generator is limited. The friction nano generator (TENG) has obvious advantages in the aspect of collecting low-frequency water wave energy and has great potential.

The friction nano generator has working modes of contact separation, an independent layer and the like, for a common contact separation mode TENG, due to material abrasion, the output performance of the common contact separation mode TENG is reduced after the common contact separation mode TENG runs for a long time, and the surface friction charge of the non-contact independent layer mode TENG is gradually attenuated under the condition of no charge supplement. Therefore, there is a need to further optimize the structure of TENG to achieve higher output performance and greater durability, and facilitate large-scale networking of TENG units so as to be applicable to large-scale collection of blue energy.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an ocean energy collection device to solve the problem that the friction nanometer generator that is applied to ocean energy collection is relatively poor in durability and relatively weak in electric output performance.

On the one hand, this application embodiment provides an ocean energy collection device, including casing and runner assembly, the casing is hollow columnar structure, the runner assembly sets up inside the casing, just the runner assembly can use the casing axis rotates as the pivot. The inner wall of the shell is provided with a brush and an electrode assembly, the brush and the electrode assembly are arranged at intervals in the circumferential direction of the shell, the electrode assembly comprises at least one first electrode layer and at least one second electrode layer, and the at least one first electrode layer and the at least one second electrode layer are alternately arranged along the circumferential direction of the shell. The rotating assembly is characterized in that a dielectric assembly is arranged on one side, facing the inner wall of the shell, of the rotating assembly and comprises at least one dielectric layer, when the rotating assembly rotates, the dielectric layer and the brush are in friction electrification, and the dielectric layer, the first electrode layer and the second electrode layer are subjected to electrostatic induction.

According to an aspect of the embodiments of the present application, the number of the electrode assemblies is plural, and the plural electrode assemblies are arranged at intervals in the circumferential direction of the case. The number of the dielectric assemblies is the same as that of the electrode assemblies, and one dielectric assembly is used for generating electrostatic induction with one electrode assembly.

According to an aspect of an embodiment of the present application, the central angles between the adjacent electrode assemblies are the same, and the central angles between the adjacent dielectric assemblies are the same.

According to an aspect of the embodiment of the present application, the number of the rotating assemblies is the same as the number of the dielectric assemblies, and one of the dielectric assemblies is correspondingly disposed on one of the rotating assemblies.

According to an aspect of an embodiment of the present application, a side of the rotating member facing the inner wall of the housing has protrusions, the number of the protrusions is the same as the number of the dielectric layers, and one of the dielectric layers is disposed on one of the protrusions.

According to an aspect of the embodiment of the application, shells inner wall is provided with the mounting groove, the mounting groove is to keeping away from the casing axis direction is sunken, the brush sets up in the mounting groove.

According to an aspect of the embodiment of the application, the rotating assembly comprises a mounting plate, a connecting arm and a positioning piece, one end of the connecting arm is connected with the mounting plate, and the other end of the connecting arm is connected with the positioning piece. The locating piece and the shell are coaxially arranged, and the dielectric assembly is arranged on one side, facing the inner wall of the shell, of the mounting plate.

According to an aspect of the embodiment of the application, the inside pivot that is provided with of casing, the pivot is followed casing axial extension, the runner assembly cover is established in the pivot.

According to an aspect of the embodiment of the present application, the rotating assembly is connected to the rotating shaft through a bearing, and the bearing is a super-lubricated ceramic bearing.

According to an aspect of the embodiment of the present application, an end of the rotating assembly near the inner wall of the housing is provided with a weight.

The ocean energy collecting device provided by the embodiment of the application rotates under the external excitation, the dielectric layer and the brush are in friction electrification, then the charges on the dielectric layer and the electrode layer generate electrostatic induction, opposite charges are induced on the electrode layer, and the charges are transferred along with the charges generated between the first electrode layer and the second electrode layer in the left-right swinging process of the rotating assembly, so that the current output can be realized when the rotating assembly is externally connected with a load. Through waterproof encapsulation, the ocean energy collection device that this application embodiment provided can collect the water wave energy at the surface of water, turns into the mechanical energy that the subassembly produced under the water wave impact into the electric energy, realizes the collection of kind of ocean energy, and the whole durability of device is higher, and electric output performance is stronger, has solved the relatively poor, the electric output performance weak problem of durability that the friction nanometer generator that is applied to ocean wave energy collection exists.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a marine energy harvesting apparatus according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the dielectric assembly of the ocean energy harvesting device according to the embodiment of the present application including a dielectric layer;

FIG. 3 is a schematic structural view of a dielectric assembly of an ocean energy harvesting device according to an embodiment of the present application including two dielectric layers;

FIG. 4 is a schematic structural diagram of a dielectric assembly of an ocean energy harvesting device according to an embodiment of the present application including three dielectric layers;

FIG. 5 is a schematic structural view of a dielectric assembly of the ocean energy harvesting device according to an embodiment of the present application including four dielectric layers;

FIG. 6 is a graph of output current versus a dielectric assembly of an ocean energy harvesting device according to an embodiment of the present application including a different number of dielectric layers;

FIG. 7 is a schematic structural view of a rotating assembly of the ocean energy harvesting device according to the embodiment of the present application;

fig. 8 is a schematic diagram of a time-varying output current of the ocean energy collecting device according to the embodiment of the present application after being subjected to an external stimulus.

Reference numerals:

1-shell, 2-rotating component, 3-brush, 4-first electrode layer, 5-second electrode layer, 6-dielectric layer, 7-bulge, 8-installation groove, 9-installation plate, 10-connecting arm, 11-positioning piece, 12-rotating shaft, 13-bearing, 14-counterweight and 15-reinforcing rib.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.

In the description of the present application, it is noted that, unless otherwise indicated, the terms "first" and "second," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; "plurality" means two or more; the terms "inner," "outer," "top," "bottom," and the like, as used herein, refer to an orientation or positional relationship shown in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Referring to fig. 1, an embodiment of the present application provides a marine energy collecting apparatus, which may include a housing 1 and a rotating assembly 2. Wherein, casing 1 can be hollow columnar structure, and rotating assembly 2 sets up inside casing 1, and rotating assembly 2 can use the 1 axis of casing to rotate as the axis of rotation. The inner wall of the casing 1 may be provided with brushes 3 and electrode assemblies, the brushes 3 and the electrode assemblies may be spaced apart from each other in the circumferential direction of the casing 1, and the electrode assemblies may include at least one first electrode layer 4 and at least one second electrode layer 5, and the at least one first electrode layer 4 and the at least one second electrode layer 5 are alternately arranged in the circumferential direction of the casing 1. The side of the rotating component 2 facing the inner wall of the housing 1 may be provided with a dielectric component, the dielectric component may include at least one dielectric layer 6, when the rotating component 2 rotates, the dielectric layer 6 and the brush 3 are rubbed to generate electricity, and the dielectric layer 6, the first electrode layer 4 and the second electrode layer 5 generate electrostatic induction. In this embodiment, the adjacent first electrode layers 4 and the second electrode layers 5 are not connected, all the first electrode layers 4 are electrically connected, and all the second electrode layers 5 are electrically connected. The width of the dielectric layer 6 is equal to or slightly smaller than the width of the electrode layer in the circumferential direction of the case 1. Under the excitation of the outside, the rotating component 2 rotates, the dielectric layer 6 and the brush 3 are rubbed to generate electricity, then the charges on the dielectric layer 6 and the electrode layers generate electrostatic induction, opposite charges are induced on the electrode layers, and the charges are transferred between the first electrode layer 4 and the second electrode layer 5 along with the left-right swing of the rotating component 2, so that the current output can be realized when the load is externally connected. Through waterproof encapsulation, the ocean energy collection device that this application embodiment provided can collect the water wave energy at the surface of water, turns into the electric energy with the mechanical energy that rotation assembly 2 produced under the water wave impact, realizes planting the collection of ocean energy, and the whole durability of device is higher, and electric output performance is stronger.

The brush 3 rubs against the dielectric layer 6, so that the friction resistance is small, the abrasion to the dielectric layer 6 is light, and the rotation of the rotating component 2 is less obstructed. Moreover, the friction between the dielectric layer 6 and the brush 3 can not only start the electricity, but also supplement the charges, and the charges on the dielectric layer 6 can be saturated after a plurality of cycles along with the left-right swing of the rotating component 2, so that the generating efficiency is higher.

In a specific implementation, the housing 1 may be made of an ultraviolet light curing resin, and the housing 1 may be molded by using a 3D printing technology. The hair brush 3 can be made of animal fur such as rabbit hair, and can also be made of polymer with better electropositivity.

The dielectric layer 6 may be made of a material having a good electronegativity, such as fluorine-containing material, fluorinated isopropene (FEP), polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE), or the like. The dielectric layer 6 may be bonded to the side of the rotating assembly 2 facing the inner wall of the housing 1.

The first electrode layer 4 and the second electrode layer 5 may be made of a metal material having a high conductivity, such as copper or aluminum. The electrode assembly as a whole may be manufactured using Printed Circuit Board (PCB) technology. The electrode assembly may be integrally formed and then bonded to the inner wall of the case 1. Thus, the electrode assembly cooperates with the dielectric assembly to form an integrated, free-standing TENG.

The rotating assembly 2 and the electrode assembly may have a gap therebetween, and the gap may be 1-2mm, and exemplarily, the gap may be 1.5 mm.

In one possible embodiment, the number of the electrode assemblies may be plural, and the plural electrode assemblies are arranged at intervals in the circumferential direction of the case 1. The number of the dielectric assemblies is the same as that of the electrode assemblies, and one dielectric assembly is used for generating electrostatic induction with one electrode assembly. In specific implementation, the central angles between adjacent electrode assemblies may be the same, and the central angles between adjacent dielectric assemblies may also be the same, that is, a plurality of electrode assemblies may be arranged at even intervals in the circumferential direction of the casing 1, and a plurality of dielectric assemblies may be arranged at even intervals in the circumferential direction of the casing 1. At this moment, the number of rotating assembly 2 can be the same with the number of dielectric assembly, and a dielectric assembly corresponds the setting on a rotating assembly 2 to can improve 1 inside space utilization of casing, and the rotating assembly 2 that is located 1 first half space of casing can have hollow out construction in order to lighten weight, thereby guarantees that the rotating assembly 2 is located 1 latter half space of casing under the natural state, and when the external excitation, a plurality of rotating assembly 2 wholly can swing. Also, one or more brushes 3 may be disposed between the adjacent electrode assemblies at this time. In fig. 1, two electrode assemblies are illustrated, the two electrode assemblies are uniformly distributed on the inner wall of the shell 1, the number of the dielectric assemblies is also two, the number of the rotating assemblies 2 is correspondingly two, the central angle between the two rotating assemblies 2 is 180 °, one rotating assembly 2 located in the upper half space of the shell 1 has a hollow structure, and two brushes 3 are arranged between the adjacent electrode assemblies.

Fig. 2, 3, 4 and 5 show the case where the dielectric assembly comprises one, two, three and four dielectric layers 6, respectively. When the dielectric assembly includes a plurality of dielectric layers 6, the area of a single dielectric layer 6 is reduced and the time for the dielectric layer 6 to cross the motor layer is shortened without changing the occupied area of the whole dielectric assembly, as can be seen from I ═ dQ/dt, the output current is increased, so that a higher current output and a larger current output period within one period of oscillation can be achieved by increasing the number of dielectric layers 6 included in the dielectric assembly. As shown in fig. 6, N in the figure indicates the number of dielectric layers 6 included in the dielectric assembly, and as can be seen from fig. 6, the output current of the device increases as the number of dielectric layers 6 increases. It will be appreciated that the central angle of the side of the moving member on which the dielectric member is provided, and the central angle of the dielectric layer 6, can be adjusted according to the overall size of the device, so as to obtain the optimum moving state of the moving member and the optimum electrical output performance of the device. Illustratively, the central angle of the side of the moving assembly on which the dielectric assembly is disposed is 30 °, and when the dielectric assembly includes two, three and four dielectric layers 6, the central angle of the single dielectric layer 6 may be designed to be 9.47 °, 5.735 ° and 3.983 °, respectively.

In a possible embodiment, the side of the rotating member 2 facing the inner wall of the housing 1 may be provided with protrusions 7, the number of protrusions 7 being the same as the number of dielectric layers 6, one dielectric layer 6 being provided on one protrusion 7. When the dielectric layer 6 is plural, the plural projections 7 are arranged at intervals in the circumferential direction of the case 1. The arrangement of the protrusion 7 can reduce the distance between the dielectric layer 6 and the electrode layer, so that charges can be more easily induced between the dielectric layer 6 and the electrode layer.

In some embodiments, the inner wall of the housing 1 may be provided with a mounting groove 8, the mounting groove 8 is recessed in a direction away from the axis of the housing 1, and the brush 3 may be inserted into the mounting groove 8 to be fixed. Because the clearance between dielectric subassembly and the electrode subassembly is less, compare in brush 3 bonds on casing 1 inner wall, when brush 3 fixed connection was in mounting groove 8, brush 3 was less in casing 1 internal surface occupation space, and 3 roots of brush are softer, and the rotation of rotating assembly 2 is hindered lessly. In a specific embodiment, the mounting groove 8 may be formed at the same time when the housing 1 is formed.

In one possible embodiment, as shown in fig. 7, the rotating assembly 2 may include a mounting plate 9, a connecting arm 10 and a positioning member 11, wherein one end of the connecting arm 10 is connected with the mounting plate 9, and the other end of the connecting arm 10 is connected with the positioning member 11. The positioning element 11 may be a hollow cylinder, and the positioning element 11 and the housing 1 are coaxially disposed. A plurality of connecting arms 10 may be provided between the mounting plate 9 and the positioning member 11, and the connecting arms 10 may be arranged at intervals along the axial direction of the housing 1. In combination with the above, the hollowed-out structure may be provided on the connecting arm 10. The protrusions 7 are arranged on the side of the mounting plate 9 facing the inner wall of the housing 1, whereby the dielectric assembly is also arranged on the side of the mounting plate 9 facing the inner wall of the housing 1. In specific implementation, the rotating assembly 2 can be formed by adopting a 3D printing technology.

In some embodiments, the housing 1 is provided with a rotating shaft 12 inside, the rotating shaft 12 extends along the axial direction of the housing 1, and the rotating assembly 2 is sleeved on the rotating shaft 12. The rotating assembly 2 is connected to the rotating shaft 12 through a bearing 13. In combination with the above, the positioning element 11 is sleeved on the bearing 13, so that the rotating assembly 2 is rotatably connected to the rotating shaft 12.

In a specific implementation, the bearing 13 may be a super-lubricated ceramic bearing 13. When the external excitation is performed, the swing resistance of the rotating assembly 2 mainly comes from the friction resistance of the bearing 13, when the super-lubricating ceramic bearing 13 is used, the friction resistance is remarkably reduced, the rotating assembly 2 is favorably rotated under the external excitation, the swing time of the rotating assembly 2 after the device is excited by the external excitation can be greatly prolonged, and the electric energy output of the device is greatly improved. By combining with a specific use scene, the device can realize long-time and high-performance electric energy output under one-time wave excitation, and is favorable for collecting ultralow-frequency water wave energy, thereby improving the capability of the device for collecting ocean energy. Fig. 8 shows the output current as a function of time after the device is subjected to an external excitation, and it can be seen from fig. 8 that the oscillation time of the rotating assembly 2 can last for more than 5 minutes, indicating that the device has a significant advantage in collecting discontinuous ultra low frequency water wave energy.

In some embodiments, the end of the rotating assembly 2 in the radial direction of the housing 1 close to the inner wall of the housing 1 may be provided with a weight 14 to lower the center of gravity of the rotating assembly 2, facilitating the swinging of the rotating assembly 2 under external excitation. In combination with the above, the weight 14 may be fixed to the connecting arm 10.

Also, the housing 1 may be provided with a reinforcing rib 15 to reinforce the structural strength of the housing 1 and prevent the housing 1 from being deformed. The ribs 15 may be integrally formed with the housing 1. The strengthening rib 15 can set up on the casing 1 inner wall to arrange along casing 1's circumference, and the number of strengthening rib 15 can be a plurality of, and a plurality of strengthening ribs 15 can be arranged at 1 axial of casing interval.

It should be understood by those skilled in the art that the foregoing is only illustrative of the present invention, and is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. The utility model provides an ocean can collection device, its characterized in that, includes casing and rotating assembly, the casing is hollow columnar structure, rotating assembly sets up inside the casing, just rotating assembly can use the casing axis rotates as the pivot, wherein:

the inner wall of the shell is provided with a brush and an electrode assembly, the brush and the electrode assembly are arranged at intervals in the circumferential direction of the shell, the electrode assembly comprises at least one first electrode layer and at least one second electrode layer, and the at least one first electrode layer and the at least one second electrode layer are alternately arranged along the circumferential direction of the shell;

the rotating assembly is characterized in that a dielectric assembly is arranged on one side, facing the inner wall of the shell, of the rotating assembly and comprises at least one dielectric layer, when the rotating assembly rotates, the dielectric layer and the brush are in friction electrification, and the dielectric layer, the first electrode layer and the second electrode layer are subjected to electrostatic induction.

2. The ocean energy harvesting device of claim 1 wherein there are a plurality of the electrode assemblies, the plurality of electrode assemblies being spaced circumferentially around the housing;

the number of the dielectric assemblies is the same as that of the electrode assemblies, and one dielectric assembly is used for generating electrostatic induction with one electrode assembly.

3. The ocean energy harvesting device of claim 2 wherein the central angle between adjacent ones of the electrode assemblies is the same and the central angle between adjacent ones of the dielectric assemblies is the same.

4. The ocean energy harvesting device of claim 2 or 3 wherein the number of the rotating assemblies is the same as the number of the dielectric assemblies, one dielectric assembly being correspondingly disposed on each rotating assembly.

5. The ocean energy harvesting device of claim 1 wherein the side of the rotating assembly facing the inner wall of the housing has a number of projections equal to the number of dielectric layers, one of the dielectric layers being disposed on each of the projections.

6. The ocean energy harvesting device of claim 1 wherein the inner wall of the housing is provided with a mounting groove that is recessed away from the axis of the housing, the brush being disposed within the mounting groove.

7. The ocean energy collecting device of claim 1, wherein the rotating assembly comprises a mounting plate, a connecting arm and a positioning member, wherein one end of the connecting arm is connected with the mounting plate, and the other end of the connecting arm is connected with the positioning member;

the locating piece and the shell are coaxially arranged, and the dielectric assembly is arranged on one side, facing the inner wall of the shell, of the mounting plate.

8. The ocean energy collecting device of claim 1 or 7 wherein the housing has a shaft disposed therein, the shaft extending axially along the housing, the rotating assembly being mounted on the shaft.

9. The ocean energy harvesting device of claim 8 wherein the rotating assembly is coupled to the shaft by a bearing, the bearing being a super-lubricated ceramic bearing.

10. The ocean energy harvesting device of claim 1 or 7 wherein an end of the rotating assembly proximate the inner wall of the housing is provided with a weight.