A wave energy collection device based on roller structure

Abstract

The present invention relates to the field of wave energy collection technology, and in particular to a wave energy collection device based on a roller structure. The present invention can enable the wave energy collection device to collect wave energy on the water surface by encapsulating the wave energy collection component in a shell, and use the impact of water waves to make the pendulum swing. The pendulum drives the rotor and the stator to rotate relative to each other through the driving shaft, generating charge transfer and realizing current output, thereby converting mechanical energy into electrical energy; wherein, the rotor adopts a roller design, using line contact instead of surface contact of sliding friction, which can significantly improve the durability during long-term use and ensure the ability to collect ocean energy.

Description

Technical Field

[0001] The invention relates to the technical field of wave energy collection, and in particular to a wave energy collection device based on a roller structure. Background Art

[0002] At present, there are many TENG devices used for collecting ocean blue energy (i.e. wave energy), and through the arraying and integration of TENG units, they are used for a wider range of low-frequency ocean energy collection. Among them, the sliding mode TENG will produce wear on the surface of its friction material during long-term operation, resulting in reduced performance. The general arrayed TENG cannot replace the internal material in time because it is fixed, which is also a challenge for the long-term stable collection of ocean energy. Summary of the invention

[0003] Based on this, it is necessary to provide a wave energy collection device based on a roller structure to address the problems of poor durability and unstable energy collection efficiency of existing friction nanogenerators due to material wear.

[0004] The present invention is implemented by the following technical solutions:

[0005] The invention discloses a wave energy collection device based on a roller structure, comprising a shell and a wave energy collection component. The shell has a waterproof space inside, and the wave energy collection component is arranged in the waterproof space.

[0006] The wave energy collection assembly includes at least one stator, at least one rotor, a drive shaft, and at least one pendulum.

[0007] The stator is fixedly arranged in a waterproof space. The stator includes a substrate and 2N electrode plates. The position of the substrate is fixed in the waterproof space. The 2N electrode plates are circumferentially distributed in a petal shape on one side of the substrate, and two wires are led out from the other side of the substrate where no electrode plates are arranged. The center line of the electrode plate passes through the center of the stator, and a separation groove is arranged between two adjacent electrode plates. N≥1. The rotor is arranged in a matching manner with the stator. The rotor includes a turntable and a roller. The turntable is circumferentially arranged with a plurality of mounting grooves in a petal shape. The roller is rotatably arranged in the mounting groove, and the axis of the roller passes through the center of the rotor. The center of the stator and the center of the rotor are coaxial. When the roller rotates with the rotor, it is electrified by friction with the electrode plate. Among them, the roller is in line contact with the electrode plate when passing through the electrode plate, and is not in contact with the electrode plate when passing through the separation groove. The drive shaft passes through the stator and the rotor. Among them, the rotor rotates with the drive shaft. The stator is rotatably connected with the drive shaft. The pendulum is arranged at the end of the driving shaft, and is used for swinging when the wave energy collection device is acted upon by waves, and then driving the rotor to rotate relative to the stator through the driving shaft.

[0008] The realization of the wave energy collection device based on a roller structure is based on the method or process of an embodiment of the present disclosure.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The present invention encapsulates the wave energy collection component in a shell, so that the wave energy collection device can collect wave energy on the water surface, and utilizes the impact of water waves to make the pendulum swing. The pendulum drives the rotor and the stator to rotate relative to each other through the driving shaft, thereby generating charge transfer and realizing current output, thereby converting mechanical energy into electrical energy. Among them, the rotor adopts a roller design and uses line contact instead of surface contact of sliding friction, which can significantly improve the durability during long-term use and ensure the ability to collect ocean energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of 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 creative work.

[0012] Figure 1 This is a diagram of the internal structure of a wave energy collection device based on a roller structure provided in Example 1 of the present invention;

[0013] Figure 2 for Figure 1 Structural diagram of the middle shell;

[0014] Figure 3 for Figure 1 The structure diagram after removing the shell;

[0015] Figure 4 for Figure 3 The structural diagram after removing one side of the fixing plate;

[0016] Figure 5 for Figure 1 The structural diagram of the middle stator;

[0017] Figure 6 for Figure 1 Structural diagram of the side of the middle stator without electrode plates;

[0018] Figure 7 for Figure 1 The structural diagram of the middle rotor;

[0019] Figure 8 for Figure 1 A structural diagram of another configuration of the middle rotor;

[0020] Fig. 9 for Figure 1 The structure diagram of the pendulum;

[0021] Fig.10 for Figure 1 Structural diagram of the middle fixed plate;

[0022] Fig.11 for Figure 1 Structural diagram of the middle support plate;

[0023] Fig.12 is a curve chart showing the results of a durability test on a wave energy collection device based on a roller structure in Example 2 of the present invention;

[0024] Fig.13 This is a comparison chart of current output tests on roller-structured wave energy collection devices with different numbers of rollers in Example 2 of the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Housing, 2. Pendulum, 3. Connecting shaft, 4. Shaft lock, 5. Fixing plate, 6. Stator, 7. Rotor, 8. Support plate, 9. Fixing part, 201. Mounting seat, 202. Swing arm, 203. Counterweight, 204. Connecting block, 501. Bearing hole one, 502. Fixing hole one, 601. Through hole, 602. Fixing hole three, 603. Separation groove, 604. Conductive layer, 605. Wire, 606. Through hole, 701. Through-shaft hole, 702. Mounting groove, 703. Roller, 801. Bearing hole two, 802. Fixing hole two, 803. Wire groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly on the other component or there can be a component centered. When a component is considered to be "set on" another component, it can be directly set on the other component or there can be a component centered. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a component centered.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0030] Example 1

[0031] See also Figure 1 , this embodiment 1 discloses a wave energy collection device based on a roller 703 structure, including a housing 1 and a wave energy collection component. The interior of the housing 1 forms a waterproof space. The wave energy collection component is arranged in the waterproof space. In this way, the entire wave energy collection device can float on the water surface and be impacted by water waves. Generally, see Figure 2 It is recommended that the housing 1 adopts a cylindrical design, which is easier to flip when hit by water waves, thereby making it easier for the wave energy collection component to work.

[0032] See also Figure 3 , Figure 4 , is a structural diagram of a wave energy collection component. Specifically, the wave energy collection component includes at least one stator 6, at least one rotor 7, a drive shaft, and at least one pendulum 2.

[0033] The stator 6 is fixedly arranged in the waterproof space. The stator 6 includes a substrate and 2N electrode plates. The substrate is fixed in position in the waterproof space and can be directly fixedly connected to the inner wall of the housing 1, or can be fixed by connecting with other components (such as the fixing member 9 and the fixing plate 5 mentioned later).

[0034] See also Figure 5 , Figure 6 , 2N electrode plates are circumferentially distributed in a petal shape on one side of the substrate, and two wires 605 are led out from the other side of the substrate where no electrode plates are provided, N≥1. Generally, the electrode plates are made of metal materials with good conductivity such as copper and aluminum. The electrode plates are designed in a triangular shape, and the closer to the center of the substrate, the narrower it is. The center line of the electrode plate passes through the center of the stator 6 (the center of the stator 6 is coaxial with the center of the substrate), and a separation groove 603 is provided between two adjacent electrode plates. Among them, the separation grooves 603 are of equal width, generally 0.5 mm.

[0035] Among them, Figure 6 As shown, the other side of the substrate without the electrode plate is provided with two circles of conductive layer 604. The two circles of conductive layer 604 have different diameters, and their centers are coaxial with the center of the stator 6. One of the wires 605 is connected to the conductive layer 604 located in the inner circle, and the other wire 605 is connected to the conductive layer 604 located in the outer circle.

[0036] The conductive layer 604 located in the inner circle is provided with N vias 606 for electrically connecting the first electrode plate, the third electrode plate, ..., the 2N-1 electrode plate; the conductive layer 604 located in the outer circle is provided with N vias 606 for electrically connecting the second electrode plate, the fourth electrode plate, ..., the 2N electrode plate. In this way, the 2N electrode plates on the substrate can be equivalent to the two poles of the current output.

[0037] Of course, the correspondence between the two circles of conductive layers 604 and the electrode plates can also be reversed: the conductive layer 604 located in the inner circle is provided with N vias 606 for electrically connecting the second electrode plate, the fourth electrode plate, ..., the 2Nth electrode plate; the conductive layer 604 located in the outer circle is provided with N vias 606 for electrically connecting the first electrode plate, the third electrode plate, ..., the 2N-1th electrode plate.

[0038] The rotor 7 is arranged in conjunction with the stator 6. Figure 7 The rotor 7 includes a rotating disk and a roller 703. The rotating disk is petal-shaped and has a plurality of mounting grooves 702 arranged circumferentially. The roller 703 is rotatably arranged in the mounting groove 702, and the axis of the roller 703 passes through the center of the rotor 7 (the center of the rotor 7 is coaxial with the center of the rotating disk). Specifically, a mounting shaft is arranged in a single mounting groove 702, and a roller 703 can be arranged on the mounting shaft, or a plurality of rollers 703 can be arranged on the mounting shaft. Figure 8 As shown, a plurality of rollers 703 that rotate independently of each other are arranged at intervals. The number of rollers 703 is not necessarily the more the better, but there is an optimal value, which will be experimentally proved in Example 2 later and will not be expanded here.

[0039] Generally, the roller 703 is generally made of a material with good electronegativity, such as a fluorine-containing material, more specifically, fluorinated isopropylene (FEP), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), etc.

[0040] It should be emphasized that the center of the stator 6 and the center of the rotor 7 are coaxial. When the rotor 7 rotates, the roller 703 is electrified by friction with the electrode plate. Among them, the roller 703 is in line contact with the electrode plate when passing through the electrode plate, and is not in contact with the electrode plate when passing through the separation groove 603. Based on the principle of friction electrification, positive charges are generated on the electrode plate and negative charges are generated on the roller 703. As the turntable rotates, the charge transfer generates current output and is led out through the wire 605. In addition, since the roller 703 and the electrode plate are in rolling line contact, the wear on the equipment is small, and the device has better durability. For long-term use, the converted electrical energy can also be improved.

[0041] As a component for driving the rotor 7 to rotate, the drive shaft is used in conjunction with the pendulum 2. The drive shaft runs through the stator 6 and the rotor 7: the rotor 7 rotates integrally with the drive shaft; the stator 6 is rotatably connected to the drive shaft. The pendulum 2 is arranged at the end of the drive shaft, and is used to swing when the wave energy collection device is acted upon by waves, and then drives the rotor 7 to rotate relative to the stator 6 through the drive shaft.

[0042] like Figure 3 , Figure 4 As shown, the driving shaft includes a shaft lock 4 and two connecting shafts 3. The two connecting shafts 3 are arranged at intervals and connected as a whole through the shaft lock 4. Among them, the shaft lock 4 can be made by 3D printing technology to ensure that the connecting shaft 3 does not change during the movement. Two shaft holes 701 are provided in the center of the turntable. The two connecting shafts 3 pass through the shaft holes 701 one by one and engage with the turntable, so that when the driving shaft rotates, the rotor 7 will also rotate as a whole. A through hole 601 is provided in the center of the substrate. The two connecting shafts 3 pass through the through hole 601 and do not contact the substrate, so that the substrate is fixed in position in the waterproof space and is not affected by the rotation of the driving shaft.

[0043] In this embodiment 1, two pendulums 2 are provided, which are respectively provided at the two ends of the driving shaft. When viewed from the axial direction of the driving shaft, the two pendulums should overlap, so as to ensure that the forces at the two ends of the driving shaft are balanced and have the same effect on the driving shaft.

[0044] like Fig. 9 As shown, the pendulum 2 includes a mounting seat 201, a connecting block 204, a swing arm 202, and a counterweight 203. A clamping groove is provided at the center of the mounting seat 201. The connecting block 204 is provided in the clamping groove; the connecting block 204 is connected to the drive shaft. The swing arm 202 is connected to the side of the drive shaft. The counterweight 203 is provided on the swing arm 202. The pendulum 2 provides an eccentric effect, and under the impact of water waves, it will swing and cause the drive shaft to deflect, thereby causing the rotor 7 to rotate relative to the stator 6.

[0045] Of course, the stator 6 may also include a fixing plate 5 and a fixing member 9. Fig.10 , the fixing plate 5 is fixedly connected to the housing 1. A bearing hole 501 is provided at the center of the fixing plate 5. Two connecting shafts 3 pass through the bearing hole 501 and are rotatably connected to the fixing plate 5 through bearings. The outer ring of the fixing plate 5 is provided with a plurality of fixing holes 502. The outer ring of the substrate is provided with fixing holes 602 corresponding to the fixing holes 502. The fixing member 9 passes through the fixing holes 502 and 602 to connect the fixing plate 5 and the substrate as a whole. The fixing member 9 can be matched with a screw rod, a nut and a gasket. The screw rod passes through the fixing holes 502 and 602, and the nut and the gasket are worn on the screw rod to clamp the fixing plate 5 and the substrate. In this way, the fixing plate 5 serves as the basis for the substrate to achieve position fixation in the waterproof space. The bearing can be a ceramic bearing, which further reduces the rotation resistance.

[0046] In this embodiment 1, two fixing plates 5 are arranged at intervals; a plurality of support plates 8 can also be arranged between the two fixing plates 5 to support the substrate. A bearing hole 2 801 is provided at the center of the support plate 8. Two connecting shafts 3 pass through the bearing hole 2 801 and are rotatably connected to the support plate 8 through bearings. A fixing hole 2 802 is provided on the outer ring of the support plate corresponding to the fixing hole 1 502. The fixing member 9 also passes through the fixing hole 2 802 to connect the support plate 8, the fixing plate 5, and the substrate as a whole. The fixing member 9 passes through the fixing hole 1 502 and the fixing hole 3 602 to connect the fixing plate 5 and the substrate as a whole. The fixing member 9 can still be matched with a screw, a nut, and a gasket. The screw passes through the fixing hole 2 802, and the nut and the gasket are worn on the screw to clamp and fix the support plate 8. The bearing can also be a ceramic bearing to further reduce the rotational resistance.

[0047] The other side of the substrate without the electrode plate is arranged next to the support plate 8, and the sides of the adjacent substrates with the electrode plates are arranged opposite to each other, that is, both sides of the single support plate 8 have substrates, which is convenient for array integration design. Fig.11 The support plate 8 is also provided with a wire groove 803; the wire groove 803 is provided at the connection between the wire 605 and the conductive layer 604, and is used to leave space for the wire 605. This is because the connection between the wire 605 and the conductive layer 604 is generally welded, there will be a protrusion, and the wire 605 also occupies a certain space.

[0048] This embodiment 1 discloses an arrayed integrated design, in which three support plates 8 are provided, and substrates are provided on both sides of the three support plates 8, and a substrate is also provided between the support plate 8 and the fixed plate 5, and a total of 8 substrates are provided. A rotor 7 is provided between adjacent substrates, and the rotor 7 and the substrate are close to each other. It should be emphasized that if the rotor 7 can make intermittent line contact with the electrode plates on the substrates on both sides of it, it means that the adjacent substrates are too small and have a certain rotation obstacle to the rotor 7 in the middle. Therefore, the distance between adjacent substrates must satisfy: when the rotor 7 located between the adjacent substrates rotates, it makes intermittent line contact with the electrode plate on one side of the substrate and never contacts the electrode plate on the other side of the substrate. In this way, the rotor 7 generates electricity by friction with the substrate on one side, and because the rotor 7 is very close to the substrate on the other side, the electrode plate on this side will be affected by electrostatic induction and also generate charge movement, so that current can still be derived.

[0049] Of course, the number of support plates 8 can also be further increased to fully utilize the waterproof space, thereby increasing the output power per unit volume.

[0050] Example 2

[0051] In this embodiment 2, a physical device is manufactured based on the structure of embodiment 1, and experimental analysis and verification are performed.

[0052] First, the durability was tested under the conditions of torque T = 0.05N·m and speed n = 100rpm. The results are shown in Fig.12 It can be seen that after the wave energy harvesting device worked continuously for 9 hours, that is, 850,000 cycles, the output current only dropped from 11.5μA to 10.95μA, and the short-circuit current decayed by less than 5%, indicating that the wave energy harvesting device has significant advantages in durability.

[0053] Secondly, the output current of different numbers of rollers 703 is tested, and the results are shown in Fig.13 Among them, the total length of the rollers 703 in the mounting groove 702 remains the same, and when the number of rollers 703 increases, the length of a single roller 703 decreases. It can be seen that the output current increases first and then decreases with the increase in the number of rollers 703 (the decrease in the length of the rollers 703), and in Example 2, the output performance is the best (the output current is the largest) when the number of rollers 703 is 5.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wave energy collection device based on a roller structure, characterized in that: include: A housing, the interior of which forms a waterproof space; A wave energy collection assembly is disposed in a waterproof space; The wave energy collection assembly comprises: At least one stator is fixedly arranged in the waterproof space; the stator comprises a substrate and 2N electrode plates; the substrate is fixed in position in the waterproof space; the 2N electrode plates are circumferentially distributed in a petal shape on one side of the substrate, and two wires are led out from the other side of the substrate where no electrode plates are arranged; the center line of the electrode plate passes through the center of the stator, and a separation groove is arranged between two adjacent electrode plates; N≥1; At least one rotor is matched with the stator; the rotor includes a rotating disk and a roller; the rotating disk is petal-shaped and circumferentially provided with a plurality of mounting grooves; the roller is rotatably arranged in the mounting groove, and the axis of the roller passes through the center of the rotor; the center of the stator and the center of the rotor are coaxial; when the roller rotates with the rotor, it is electrified by friction with the electrode plate; wherein the roller is in line contact with the electrode plate when passing through the electrode plate, and is not in contact with the electrode plate when passing through the separation groove; A drive shaft that passes through the stator and the rotor; wherein the rotor rotates integrally with the drive shaft, and the stator does not rotate with the drive shaft; and At least one pendulum is arranged at the end of the driving shaft, and is used for swinging when the wave energy collection device is acted upon by waves, thereby driving the rotor to rotate relative to the stator through the driving shaft.

2. A wave energy collection device based on a roller structure according to claim 1, characterized in that: The driving shaft includes a shaft lock and two connecting shafts; The two connecting shafts are spaced apart and connected as one through a shaft lock; The center of the rotating disk is provided with two shaft holes, and two connecting shafts pass through the shaft holes one by one and engage with the rotating disk; A through hole is arranged at the center of the substrate, and two connecting shafts pass through the through hole and do not contact the substrate.

3. A wave energy collection device based on a roller structure according to claim 1, characterized in that: A mounting shaft is arranged in a single mounting groove, and a plurality of rollers which rotate independently of each other are arranged at intervals on the mounting shaft.

4. A wave energy collection device based on a roller structure according to claim 2, characterized in that: The pendulum comprises: A mounting seat, the center of which is provided with a clamping groove; A connecting block is arranged in the clamping groove; the connecting block is connected to the driving shaft; A swing arm connected laterally to the drive shaft; and A counterweight is arranged on the swing arm.

5. A wave energy collection device based on a roller structure according to claim 4, characterized in that: Two pendulums are provided, which are respectively arranged at two ends of the driving shaft.

6. A wave energy collection device based on a roller structure according to claim 4, characterized in that: The other side of the substrate where the electrode plate is not provided is provided with two circles of conductive layers; the two circles of conductive layers have different diameters, and the centers thereof coincide with the center of the stator; One of the wires is connected to the conductive layer located in the inner circle, and the other wire is connected to the conductive layer located in the outer circle; The conductive layer located in the inner circle is provided with N vias for electrically connecting the first electrode plate, the third electrode plate, ..., the 2N-1 electrode plate; the conductive layer located in the outer circle is provided with N vias for electrically connecting the second electrode plate, the fourth electrode plate, ..., the 2N electrode plate; Or, the conductive layer located in the inner circle is provided with N vias for electrically connecting the second electrode plate, the fourth electrode plate, ..., the 2Nth electrode plate; the conductive layer located in the outer circle is provided with N vias for electrically connecting the first electrode plate, the third electrode plate, ..., the 2N-1th electrode plate.

7. A wave energy collection device based on a roller structure according to claim 6, characterized in that: The stator also includes: A fixing plate, which is fixedly connected to the housing; a bearing hole 1 is arranged at the center of the fixing plate; the two connecting shafts pass through the bearing hole 1 and are rotatably connected to the fixing plate through the bearing; a plurality of fixing holes 1 are arranged on the outer ring of the fixing plate; and fixing holes 3 are arranged on the outer ring of the base plate corresponding to the fixing holes 1; as well as The fixing piece passes through the fixing hole 1 and the fixing hole 3 to connect the fixing plate and the base plate into one.

8. A wave energy collection device based on a roller structure according to claim 7, characterized in that: Two fixed plates are arranged at intervals; a plurality of support plates are arranged between the two fixed plates for supporting the base plate; a second bearing hole is arranged at the center of the support plate; the two connecting shafts pass through the second bearing hole and are rotatably connected to the support plate through the bearing; a second fixing hole is arranged on the outer ring of the support plate corresponding to the first fixing hole; the fixing piece also passes through the second fixing hole to connect the support plate, the fixed plate and the base plate as a whole.

9. A wave energy collection device based on a roller structure according to claim 8, characterized in that: The other side of the substrate without the electrode plate is arranged close to the support plate; the sides of the adjacent substrates with the electrode plates are arranged opposite to each other; The support plate is also provided with a wire passing groove; the wire passing groove is arranged corresponding to the connection between the wire and the conductive layer, and is used to leave space for the wire.

10. A wave energy collection device based on a roller structure according to claim 9, characterized in that: A rotor is arranged between adjacent substrates, and the rotor and the substrates are close to each other; wherein, when the rotor located between adjacent substrates rotates, it has intermittent line contact with the electrode plate on one substrate and never contacts with the electrode plate on the other substrate.

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