CN219918743U - Wave energy collection device with high power density - Google Patents

Abstract

The utility model relates to a wave energy collecting device with high power density, which comprises a shell and a power generation part. The power generation part comprises a plurality of first plates, a plurality of second plates, a plurality of electrode pairs and a plurality of rolling elements. The second plates are respectively and cross-connected with the first plates so as to form a plurality of dielectric channels between the second plates and the first plates. The electrode pairs are respectively arranged in the dielectric channels, each electrode pair comprises a first metal electrode and a second metal electrode, and the first metal electrode and the second metal electrode are arranged on the inner wall of the corresponding dielectric channel at intervals. A plurality of rolling elements are respectively arranged in a plurality of dielectric channels; the rolling element comprises a plurality of dielectric pellets capable of rolling in the dielectric channel, and the dielectric pellets generate electricity by friction with the first metal electrode and the second metal electrode when rolling in the dielectric channel. The utility model has simple structure, high space utilization rate and higher output performance.

Description

Wave energy collection device with high power density

Technical Field

The utility model relates to the technical field of wave energy power generation, in particular to a wave energy collecting device with high power density.

Background

Ocean wave energy has the advantages of wide distribution and relatively high energy density. In fact, it is considered a promising renewable energy source for wave energy collection devices with high power density. In terms of wave energy harvesting, conventional wave energy harvesting devices consist of a floating buoy and an electromagnetic generator (EMG), which means considerable costs and a more complex structure.

In recent years, friction nano-generators (TENG) of a small-ball rolling type structure have been attracting attention, small-diameter solid particles can be easily activated under external conditions and exhibit a behavior close to that of a fluid, thereby achieving a balance between increasing a contact area and reducing material fatigue, and there is no strict limitation on the device. TENG of such structures has been structurally designed, material handling and system optimized for more efficient collection and conversion of wave energy. For example, patent publication No. 202111080876.8 discloses a wave plate-shaped wave energy collection device based on friction nano generator, including the power generation portion that forms by parallelly connected a plurality of power generation unit, the power generation unit is including the tortuous board that is the cuboid shape, the upper surface and the lower surface of bent board all equidistant are provided with the same U type recess of a plurality of, the outside laminating of upper surface and the lower surface of bent board is provided with a pair of first electrode, the first electrode outside is provided with a pair of second electrode, the recess of first electrode with the second electrode constitutes the dielectric passageway, be provided with a plurality of dielectric ball in the dielectric passageway. However, the existing wave energy collecting device is complex in structure, the number of dielectric channels formed in a limited space is small, the space utilization rate is low, and the output performance is low.

Disclosure of Invention

Based on the above, it is necessary to provide a wave energy collecting device with high power density, aiming at the technical problems of low output performance caused by complex structure and low space utilization rate of the current wave energy collecting device based on the friction nano generator.

The utility model proposes a wave energy collecting device with high power density, comprising:

a housing having a sealed cavity; and

a power generation unit mounted in the sealed chamber;

the power generation section includes:

a plurality of first plates, each of which is mounted on the inner wall of the housing;

the second plates are arranged on the inner wall of the shell and are respectively and crosswise connected with the first plates so as to form a plurality of dielectric channels between the second plates and the first plates;

the electrode pairs are respectively arranged in the dielectric channels, each electrode pair comprises a first metal electrode and a second metal electrode, and the first metal electrode and the second metal electrode are arranged on the inner wall of the corresponding dielectric channel at intervals; the first metal electrodes of the plurality of electrode pairs are connected in parallel, and the second metal electrodes of the plurality of electrode pairs are connected in parallel; and

a plurality of rolling elements respectively arranged in a plurality of the dielectric channels; the rolling element comprises a plurality of dielectric pellets capable of rolling in the dielectric channel, and the dielectric pellets generate electricity by friction with the first metal electrode and the second metal electrode when rolling in the dielectric channel.

In a preferred embodiment of the present utility model, two copper layers are plated on the inner wall of the dielectric channel in the circumferential direction to form the first metal electrode and the second metal electrode, and a gap is left between the two copper layers to form a separation region.

In a preferred embodiment of the present utility model, the first plurality of plates are arranged in parallel and spaced apart in a first predetermined direction, and the second plurality of plates are arranged in parallel and spaced apart in a second predetermined direction, the first predetermined direction being at a predetermined angle to the second predetermined direction.

In a preferred embodiment of the present utility model, the distances between any two adjacent plates are equal, and the distances between any two adjacent plates are equal.

In a preferred embodiment of the present utility model, the first plates are respectively and perpendicularly connected to the second plates, and the separation areas of the inner walls of the dielectric channels are located in the same plane.

In a preferred embodiment of the present utility model, the dielectric pellets are made of an insulating polymer material, and the polymer material is one of PTFE, PP, FEP, PVC and nylon.

In a preferred embodiment of the present utility model, in the wave energy collecting apparatus, the volume of the plurality of rolling elements is 2% -30% of the volume of the wave energy collecting apparatus, and the volume of the plurality of rolling elements is 5% -50% of the volume of the gap inside the housing.

In a preferred embodiment of the present utility model, the housing is made of transparent photosensitive resin material, and the housing has a square structure, a cylindrical structure, a spherical structure or a regular hexagonal structure.

In a preferred embodiment of the present utility model, the housing comprises:

a housing having an opening at one side thereof, the power generation part being installed in the housing; and

the cover body is detachably matched and hermetically connected with the opening end of the shell so as to form the sealing cavity in a matched mode between the cover body and the shell.

In a preferred embodiment of the utility model, the dielectric pellets have a diameter of 3mm-2cm.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the wave energy collecting device, the power generation part is provided with the dielectric pellets which can freely roll through the plurality of first plates and the plurality of second plates which are in cross connection, the dielectric pellets are arranged in the dielectric passages, friction power generation is carried out between the dielectric pellets and the metal electrodes, the structure is simple, the space utilization rate is high, more dielectric passages can be formed in a limited space, the output performance is high, the energy collection under ultra-low frequency water waves is facilitated, and the capability of the friction nano generator for collecting ocean wave energy is improved.

2. According to the wave energy collecting device, the first metal electrode and the second metal electrode are formed by plating the copper layer on the inner wall of the dielectric channel, so that the space utilization rate is further improved, the charge and power output are improved by increasing the contact interface, and the ocean energy collecting capacity of the generator is remarkably improved.

3. Under the action of external mechanical excitation (such as water wave), the dielectric pellets roll back and forth between the first metal electrode and the second metal electrode along the dielectric channel, the dielectric pellets, the first metal electrode and the second metal electrode have different electron losing and losing capacities, friction electrification between the dielectric pellets and the first metal electrode and between the dielectric pellets and the second metal electrode enables the first metal electrode and the second metal electrode to be positively charged, negative charges are generated on the surfaces of the dielectric pellets, and the back and forth movement of the charged dielectric pellets induces free electrons to correspondingly flow between the first metal electrode and the second metal electrode through an external circuit, so that alternating current is generated, and conversion from mechanical energy to electric energy is realized.

4. The utility model can change the length and the number of the first plates and the second plates, the distance between the two adjacent first plates and the two second plates, the number of dielectric pellets in each dielectric channel and the weight of the dielectric pellets, thereby changing the number and the volume of the dielectric channels, fully utilizing the internal space, improving the output power of the wave energy collecting device in unit volume, and further changing the output performance of the whole wave energy collecting device.

Drawings

Fig. 1 is a schematic structural diagram of a wave energy collecting apparatus with high power density according to embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the power generation section of FIG. 1;

FIG. 4 is a graph of the charge impact of different mass dielectric pellets on the wave energy harvesting apparatus of FIG. 1 having a high power density;

FIG. 5 is a graph of the current impact of different mass dielectric pellets on the wave energy harvesting apparatus of FIG. 1 having a high power density;

FIG. 6 is a graph of the voltage impact of different mass dielectric pellets on the wave energy harvesting apparatus of FIG. 1 having a high power density;

FIG. 7 is a schematic view of a wave energy collecting apparatus with high power density according to embodiment 2 of the present utility model;

FIG. 8 is a schematic view of the power generation section of FIG. 7;

FIG. 9 is a schematic view of a wave energy collecting apparatus with high power density according to embodiment 3 of the present utility model;

FIG. 10 is a schematic view of the power generation section of FIG. 9;

FIG. 11 is a schematic view of a wave energy collecting apparatus with high power density according to embodiment 4 of the present utility model;

FIG. 12 is a schematic view of the power generation section of FIG. 11;

FIG. 13 is a power output diagram of a differently shaped wave energy harvesting apparatus having a high power density;

FIG. 14 is a graph of power density versus wave energy collection device having a high power density in various shapes.

Description of the drawings: 1. a housing; 11. a housing; 12. a cover body; 2. a first plate; 3. a second plate; 4. a dielectric channel; 5. a dielectric pellet; 6. a copper layer; 7. blank areas.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

The embodiment provides a wave energy collecting device with high power density, which aims at the problems that the structure of the existing wave energy collecting device is complex, the space utilization rate is low, the output performance is low, the structure is simple, the output performance is high, and the wave energy collecting device is favorable for collecting wave energy under ultra-low frequency water waves.

Referring to fig. 1-3, the wave energy collecting apparatus with high power density of the present embodiment includes a housing 1 having a sealed cavity and having a cube structure, and a power generation portion encapsulated in the sealed cavity, wherein the power generation portion includes a plurality of first plates 2, a plurality of second plates 3, a plurality of electrode pairs, and a plurality of rolling members.

In this embodiment, the first plates 2 are in square structure, edges of the first plates 2 are abutted against the inner wall of the housing 1, the first plates 2 are arranged at intervals in parallel along a predetermined direction, the predetermined direction is the width direction of the housing 1, and distances between any two adjacent first plates 2 are equal. A blank area is reserved in the middle of the surfaces of the two sides of the first plate 2, and copper plating layers 6 are plated on the two sides of the blank area. In this embodiment, the first board 2 is a PCB board.

In this embodiment, the second plates 3 are of square structure, edges of the second plates 3 are abutted against the inner wall of the housing 1, the second plates 3 are arranged in parallel along a predetermined direction, the distances between any two adjacent second plates 3 are equal, the predetermined direction is the length direction of the housing 1, and the second plates 3 are respectively and vertically welded with the first plates 2 in a cross manner, so that a plurality of dielectric channels 4 with a cuboid structure are formed between the first plates 2 and the second plates 3. A blank area 7 is reserved in the middle of the surfaces of two sides of the second plate 3, copper plating layers 6 are arranged on the two sides of the blank area, the blank areas 7 of the first plates 2 and the blank areas 7 of the second plates 3 are located in the same plane, so that the blank areas 7 on the first plates 2 and the second plates 3 surrounding the dielectric channel 4 are spliced to form an annular separation area on the inner wall of the dielectric channel 4, copper layers 6 on one side of the separation area on the first plates 2 and the second plates 3 surrounding the dielectric channel 4 are matched to form a first metal electrode, copper layers 6 on the other side of the separation area on the first plates 2 and the second plates 3 surrounding the dielectric channel 4 are matched to form a second metal electrode, and the first metal electrode and the second metal electrode in the same dielectric channel 4 form an electrode pair. The first metal electrodes are connected in parallel and lead out wires to be connected with an external circuit, and the second metal electrodes are connected in parallel and then lead out wires to be connected with the external circuit. In this embodiment, the second board 3 is also a PCB board.

The rolling elements are respectively arranged in the dielectric channels 4, and each rolling element comprises a plurality of dielectric pellets 5 which can freely roll in the corresponding dielectric channel 4, and the dielectric pellets 5 generate electricity by friction with the metal electrode I and the metal electrode II when rolling in the corresponding dielectric channel 4. Under the action of external mechanical excitation (such as water wave), the dielectric pellets 5 roll back and forth along the dielectric channel 4 between the first metal electrode and the second metal electrode, the dielectric pellets 5 and the first metal electrode and the second metal electrode have different electron losing and losing capacities, friction electrification between the dielectric pellets 5 and the first metal electrode and between the dielectric pellets 5 and the second metal electrode leads the first metal electrode and the second metal electrode to carry positive charges, negative charges are generated on the surfaces of the dielectric pellets 5, and the back and forth movement of the charged dielectric pellets 5 induces free electrons to correspondingly flow between the first metal electrode and the second metal electrode through an external circuit, so that alternating current is generated, and conversion from mechanical energy to electric energy is realized. In this embodiment, the dielectric pellets 5 are made of an insulating polymer material, which may be PTFE, PP, FEP, PVC or nylon, or may be other insulating polymer materials as long as the power generation performance is satisfied. In this embodiment, the filled volume of the dielectric pellets 5 is 2% -30% of the volume of the entire wave energy collecting device, and the filled volume of the dielectric pellets 5 is 5% -50% of the volume of the gap in the housing 1. The diameters and the number of the dielectric pellets 5 in the same dielectric channel 4 can be the same or different, and in this embodiment, the diameters of the dielectric pellets 5 are 3mm-2cm, so that the dielectric pellets 5 can roll freely in the dielectric channel 4.

It should be noted that, in this embodiment, the length and number of the first plates 2 and the second plates 3 may be changed, so that the distance between the two adjacent first plates 2 and the two second plates 3 may be changed, and the number and the volume of the dielectric channels 4 may be changed, so as to change the output performance of the whole wave energy collecting device, improve the electric charge and the power output by increasing the contact interface, and significantly improve the capability of the generator to collect ocean energy.

In this embodiment, the housing 1 includes a casing 11 and a cover 12, the casing 11 and the cover 12 are made of transparent photosensitive resin material by using a 3D printing technology, after welding a plurality of first plates 2 and a plurality of second plates 3 of the power generation part, the power generation part is assembled into the casing 11, after a corresponding number of dielectric pellets 5 are placed into each dielectric channel 4, the cover 12 and the casing 11 are packaged together, and sealing between the casing 11 and the cover 12 is achieved by using waterproof glue.

Next, the influence of the mass of the dielectric pellets 5 on the output performance of the wave energy collecting device was examined, and the diameters of the dielectric pellets 5 were required to be kept uniform during the examination, and as a result, referring to fig. 4 to 6, it can be seen from the figures that the electrical output increased with the increase of the mass of the dielectric pellets 5, and when the mass of the dielectric pellets 5 was 75g, the charge, current and voltage output all reached the peak value and then decreased. Obviously, by adding more dielectric pellets 5, the contact area with each dielectric channel 4 is increased, resulting in a higher output; however, if the filling amount of the dielectric pellet 5 is too high, electrostatic induction on the two metal electrodes one and two will cancel each other, thereby limiting the overall performance.

Example 2

In this embodiment, a wave energy collecting apparatus with a high power density is proposed, which is different from embodiment 1 in that: referring to fig. 7 and 8, the housing 1 of the present embodiment has a spherical structure, the first plate 2 and the second plate 3 are all circular structures, the first plates 2 and the second plates 3 are respectively arranged along two mutually perpendicular radial directions of the housing 1 at intervals, and the diameters of the first plates 2 and the second plates 3 are gradually reduced along the radial direction of the housing 1.

Example 3

In this embodiment, a wave energy collecting apparatus with a high power density is proposed, which is different from embodiment 1 in that: referring to fig. 9 and 10, the housing 1 of the present embodiment has a cylindrical structure, the first plate 2 has a circular structure and the second plate 3 has a rectangular structure, the first plates 2 are arranged at intervals in the height direction of the cylinder, and the diameter of the first plates 2 is matched with the diameter of the housing 1; the plurality of second plates 3 are disposed at intervals in the diameter direction of the cylinder, and the widths of the second plates 3 are gradually reduced along the radial direction of the housing 1.

Example 4

In this embodiment, a wave energy collecting apparatus with a high power density is proposed, which is different from embodiment 1 in that: referring to fig. 11 and 12, a casing 1 of the present embodiment has a regular hexagonal prism structure, a first plate 2 having a regular hexagon and a second plate 3 having a rectangular structure, and a plurality of first plates 2 being arranged at intervals in a height direction of the regular hexagonal prism; the second plates 3 are arranged at intervals in the connecting line direction of two parallel opposite sides of the regular hexagonal prism, and the widths of the second plates 3 are gradually reduced from the middle to two sides.

Next, by exploring the current and output power of the wave energy collecting apparatuses of different shapes in example 1, example 2, example 3, and example 4, referring to fig. 13, (a), (b), (c), and (d) in fig. 13 show the power output graphs of the wave energy collecting apparatuses of spherical, cylindrical, regular hexagonal, and square, respectively, and show the dependence of the peak current, peak power, and average power of the wave energy collecting apparatuses of different shapes on different resistance loads, and the result shows that the output performance of the wave energy collecting apparatus of square is the best.

Next, by comparing the performances of the wave energy collecting apparatuses of different shapes in the examples 1, 2, 3 and 4, referring to fig. 14, fig. 14 is a power density comparison chart of four wave energy collecting apparatuses of different shapes, and the peak power density and the average power density of the four wave energy collecting apparatuses are compared due to the different volumes of the four shapes, which shows that the output performance of the square wave energy collecting apparatus is the highest, the peak power density is 52.87W/m3, the average power density is 10.08W/m3, and the output performance is far higher than that of the conventional friction nano-generator of the same type.

It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A wave energy harvesting apparatus having a high power density, comprising:

a housing having a sealed cavity; and

a power generation unit mounted in the sealed chamber;

the power generation unit is characterized by comprising:

a plurality of first plates, each of which is mounted on the inner wall of the housing;

the second plates are arranged on the inner wall of the shell and are respectively and crosswise connected with the first plates so as to form a plurality of dielectric channels between the second plates and the first plates;

the electrode pairs are respectively arranged in the dielectric channels, each electrode pair comprises a first metal electrode and a second metal electrode, and the first metal electrode and the second metal electrode are arranged on the inner wall of the corresponding dielectric channel at intervals; the first metal electrodes of the plurality of electrode pairs are connected in parallel, and the second metal electrodes of the plurality of electrode pairs are connected in parallel; and

a plurality of rolling elements respectively arranged in a plurality of the dielectric channels; the rolling element comprises a plurality of dielectric pellets capable of rolling in the dielectric channel, and the dielectric pellets generate electricity by friction with the first metal electrode and the second metal electrode when rolling in the dielectric channel.

2. The wave energy collecting apparatus with high power density according to claim 1, wherein two copper layers are plated on the circumference of the inner wall of the dielectric channel to form the first metal electrode and the second metal electrode, and a gap is left between the two copper layers to form a separation region.

3. The wave energy collecting apparatus of claim 2, wherein the first plurality of plates are spaced apart in parallel in a first predetermined direction and the second plurality of plates are spaced apart in parallel in a second predetermined direction, the first predetermined direction being at a predetermined angle to the second predetermined direction.

4. A wave energy collecting apparatus having a high power density according to claim 3, wherein the distance between any two adjacent plates one is equal and the distance between any two adjacent plates two is equal.

5. A wave energy collecting apparatus having a high power density as defined in claim 3, wherein each of said first plurality of plates is vertically intersected by each of said second plurality of plates, and wherein the separation areas of the inner walls of said dielectric channels are in the same plane.

6. The wave energy collecting apparatus of claim 1, wherein said dielectric pellets are made of an insulating polymeric material, said polymeric material being one of PTFE, PP, FEP, PVC and nylon.

7. The wave energy collecting apparatus of claim 1, wherein the volume of said plurality of rolling elements in said wave energy collecting apparatus is 2% -30% of the volume of said wave energy collecting apparatus and the volume of said plurality of rolling elements is 5% -50% of the volume of the internal gap of said housing.

8. The wave energy collecting apparatus with high power density according to claim 1, wherein the housing is made of transparent photosensitive resin material, and the housing is of a square structure, a cylindrical structure, a spherical structure or a regular hexagonal structure.

9. The wave energy harvesting apparatus of claim 1, wherein the housing comprises:

a housing having an opening at one side thereof, the power generation part being installed in the housing; and

the cover body is detachably matched and hermetically connected with the opening end of the shell so as to form the sealing cavity in a matched mode between the cover body and the shell.

10. The wave energy harvesting apparatus of claim 1, wherein the dielectric pellets have a diameter of 3mm-2cm.