Ocean energy power generation device

Abstract

The present application relates to an ocean energy power generation device, comprising: a cylindrical housing, a speed reducer, a connection assembly, and a triboelectric nanogenerator. The cylindrical housing comprises a first cylindrical portion and a second cylindrical portion that are rigidly connected, wherein the second cylindrical portion is located on one side of the first cylindrical portion. The speed reducer has an output torque less than an input torque thereof, and comprises an input shaft and an output shaft that respectively pass through two end walls of the first cylindrical portion. The connection assembly comprises a first connecting member and a second connecting member that are respectively located outside the two end walls of the first cylindrical portion, the first connecting member is sleeved on the input shaft of the speed reducer, the input shaft of the speed reducer can only enable unidirectional rotation relative to the first connecting member, and the second connecting member is rotatably sleeved on the output shaft of the speed reducer. The triboelectric nanogenerator comprises a first stator and a first rotor, the first stator is rigidly connected to the first cylindrical portion, and the first rotor is rigidly connected to and coaxial with the output shaft of the speed reducer. The present invention solves the problem of relatively low energy conversion efficiency of existing ocean energy power generation devices.

Description

Ocean energy power generation device TECHNICAL FIELD

[0001] The present application relates to the field of energy recycling, in particular to an ocean energy power generation device. BACKGROUND

[0002] Traditional energy, such as oil, coal, natural gas and other high-quality low-entropy energy, has been unable to meet the demand of human beings for energy, and therefore, it is urgent to develop some alternative energy, such as green energy in nature, such as wind energy, water energy, mechanical energy, etc. The friction nanogenerator (TENG) invented by the team of Wang Zhonglin provides a new method for generating electricity by using mechanical energy, which can convert a large number of distributed high-entropy energy in the environment, such as wind energy, human motion energy, vibration energy and other low-frequency energy, into effective electric energy, and then effectively collect and utilize any available energy in the environment, so that this problem is perfectly solved.

[0003] At present, most of the friction nanogenerators used to realize ocean energy collection are directly placed in the ocean, and the impact force of ocean waves is large, which has a large kinetic energy, and most of the friction nanogenerators do not utilize this point, and the output performance is often only related to the amplitude and frequency of the ocean. Therefore, the energy conversion efficiency of the existing ocean energy power generation device is relatively low, and the ocean energy cannot be fully converted into electric energy.

[0004] At present, there is no effective solution to the problem of low energy conversion efficiency of the existing ocean energy power generation device. SUMMARY

[0005] In the present application, an ocean energy power generation device is provided to solve the problem of low energy conversion efficiency of the existing ocean energy power generation device.

[0006] In a first aspect, an ocean energy power generation device is provided in the present application, which comprises:

[0007] A columnar shell comprising a first columnar part and a second columnar part rigidly connected, the second columnar part being on one side of the first columnar part;

[0008] A speed reducer rigidly mounted in the first columnar part and coaxial with the first columnar part, the output torque of the speed reducer being smaller than the input torque, the input shaft and the output shaft of the speed reducer penetrating through the two end walls of the first columnar part, respectively;

[0009] A connecting assembly comprising a first connecting member and a second connecting member, the first connecting member and the second connecting member are respectively arranged outside two end walls of the first columnar portion, the first connecting member is sleeved on the input shaft of the speed reducer, the input shaft of the speed reducer generates at most single direction rotation relative to the first connecting member, the second connecting member is rotatably sleeved on the output shaft of the speed reducer;

[0010] A friction nanogenerator installed in the first columnar portion, the friction nanogenerator comprises a first stator and a first rotor, the first stator is rigidly connected with the first columnar portion, the first rotor is rigidly connected with the output shaft of the speed reducer and coaxial with the output shaft of the speed reducer.

[0011] In some embodiments, the input shaft of the speed reducer is rigidly connected with the first connecting member.

[0012] In some embodiments, the input shaft of the speed reducer is connected with the first connecting member through a first one-way bearing.

[0013] In some embodiments, the first stator comprises a plurality of pairs of metal electrode discs arranged coaxially and spaced apart, each pair of the metal electrode discs is rigidly connected with the second columnar portion;

[0014] The first rotor comprises a plurality of acrylic discs coaxial with the metal electrode discs, each of the acrylic discs is rigidly connected with the output shaft of the speed reducer and coaxial with the output shaft of the speed reducer, and each of the acrylic discs is arranged between each pair of the metal electrode discs.

[0015] In some embodiments, the metal electrode disc is provided with a plurality of notches on a side close to the acrylic disc, and a first friction film is attached to a side of the metal electrode disc away from the acrylic disc and in the notches;

[0016] The acrylic disc is attached with a second friction film on both sides.

[0017] In some embodiments, the metal electrode disc is made of copper or aluminum;

[0018] The first friction film is made of polyamide fiber;

[0019] The second friction film is made of fluorinated isopropylene film, polyvinylidene fluoride or polytetrafluoroethylene.

[0020] In some embodiments, the diameter of the sub-acrylic disc is smaller than the diameter of the metal electrode disc, and a plurality of the metal electrode discs are rigidly connected by a plurality of fixing rods, at least one end of the plurality of fixing rods being rigidly connected to the first columnar portion, and the plurality of fixing rods being located at the periphery of the sub-acrylic disc.

[0021] The sub-acrylic disc is rigidly sleeved on the output shaft of the speed reducer by a lock shaft device.

[0022] In some embodiments, the ocean energy power generation device further comprises:

[0023] An electromagnetic generator is installed in the first columnar portion, the electromagnetic generator comprising a second stator and a second rotor, the second stator being rigidly connected to the first columnar portion, and the second rotor being sleeved on the output shaft of the speed reducer by a second one-way bearing.

[0024] In some embodiments, the second stator is in a ring structure, and the second rotor is in a disc structure, the second rotor being coaxial with the second stator and located inside the second stator.

[0025] In some embodiments, the cross section of the first columnar portion is smaller than the cross section of the second columnar portion.

[0026] In some embodiments, the first columnar portion and the second columnar portion are in an integrated structure.

[0027] In some embodiments, the density of the second columnar portion is smaller than the density of ocean water.

[0028] In some embodiments, each pair of metal electrode discs is separated by a first rubber gasket.

[0029] In some embodiments, the first rubber gasket is sleeved on the fixing rod, and both ends of the first rubber gasket are in contact with two metal electrode discs, respectively.

[0030] Compared with the related art, the marine energy power generation device provided by the application can convert marine wave energy into kinetic energy and transmit the kinetic energy to the friction nanogenerator through the columnar shell with a specific shape and the speed reducer, and the friction nanogenerator converts the kinetic energy into electric energy. More importantly, the smaller oscillation of the marine wave can be converted into a larger relative rotation stroke between the stator and the rotor in the friction nanogenerator through the speed reducer with an output torque smaller than an input torque, which is much larger than the oscillation amplitude of the marine wave. When the friction nanogenerator is directly placed in the sea, the relative rotation stroke or the relative displacement stroke between the stator and the rotor in the friction nanogenerator is basically the same as the oscillation amplitude of the marine wave. Therefore, the marine energy power generation device provided by the application has a higher marine energy conversion efficiency, and solves the problem of low energy conversion efficiency of the existing marine energy power generation device.

[0031] The details of one or more embodiments of the present application are presented in the following drawings and description to make other features, objects and advantages of the present application more clear and easy to understand. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 is an external structure diagram of the marine energy power generation device in some embodiments of the application;

[0033] Fig. 2 is an internal structure diagram of the marine energy power generation device in some embodiments of the application;

[0034] Fig. 3 is a structure diagram of the friction nanogenerator in some embodiments of the application;

[0035] Fig. 4 is a structure diagram of the first stator in some embodiments of the application;

[0036] Fig. 5 is a structure diagram of the first rotor in some embodiments of the application;

[0037] Fig. 6 is a structure diagram of the electromagnetic generator in some embodiments of the application. DETAILED DESCRIPTION

[0038] In order to more clearly understand the purposes, technical solutions and advantages of the present application, the present application is described and explained below in combination with the drawings and embodiments.

[0039] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as those commonly understood by a person of ordinary skill in the art to which the present application belongs. The terms "one", "a", "an", "the", "these", and similar terms in the present application do not mean "only one" or "exactly one", but can mean "one or more". The terms "include", "contain", "have", and any variant thereof in the present application are intended to cover the non-exclusive inclusion; for example, a process, method, system, product or device containing a series of steps or modules (units) is not limited to the listed steps or modules (units), but can include steps or modules (units) not listed, or can include other steps or modules (units) inherent to the process, method, product or device. The terms "connect", "connected", "couple", and similar terms in the present application are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The term "multiple" in the present application means two or more. The term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. Generally, the character " / " means that the objects before and after are "or" relationship. The terms "first", "second", "third", and the like in the present application are only used to distinguish similar objects, and do not represent a specific order of the objects.

[0040] In the present application, a marine energy power generation device is provided, Fig. 1 is an external structure diagram of the marine energy power generation device in some embodiments of the present application, Fig. 2 is an internal structure diagram of the marine energy power generation device in some embodiments of the present application, and Fig. 3 is a structure diagram of a friction nanogenerator in some embodiments of the present application.

[0041] As shown in Fig. 1, Fig. 2 and Fig. 3, the marine energy power generation device comprises a columnar shell 100, a speed reducer 200, a connecting assembly 300 and a friction nanogenerator 400.

[0042] The columnar shell 100 comprises a first columnar part 110 and a second columnar part 120 rigidly connected, and the second columnar part 120 is located on one side of the first columnar part 110.

[0043] The speed reducer 200 is rigidly installed in the first columnar part 110 and coaxial with the first columnar part 110, the output torque of the speed reducer 200 is less than the input torque, and the input shaft 210 and the output shaft 220 of the speed reducer 200 respectively penetrate the two end walls of the first columnar part 110.

[0044] The connecting assembly 300 comprises a first connecting piece 310 and a second connecting piece 320, which are respectively arranged outside the two end walls of the first columnar part 110, the first connecting piece 310 is sleeved on the input shaft 210 of the speed reducer 200, the input shaft 210 of the speed reducer 200 produces at most single direction rotation relative to the first connecting piece 310, and the second connecting piece 320 is rotatably sleeved on the output shaft 220 of the speed reducer 200.

[0045] The friction nanogenerator 400 is installed in the first columnar part 110, and comprises a first stator 410 and a first rotor 420, the first stator 410 is rigidly connected with the first columnar part 110, and the first rotor 420 is rigidly connected with the output shaft 220 of the speed reducer 200 and coaxial with the output shaft 220.

[0046] In the above technical solution, the first columnar part 110 is mainly used for installing the friction nanogenerator 400 and the speed reducer 200, and the cross-sectional shape thereof can be designed according to the main form of the friction nanogenerator 400. The ocean energy power generation device needs to be used in combination with a fixed platform, and in use, the first connecting piece 310 and the second connecting piece 320 are fixedly connected with the fixed platform respectively, at this time, it is necessary to ensure that the first columnar part is at a certain distance from the water surface, and then the ocean energy power generation device is installed on the fixed platform. Since the first connecting piece 310 and the second connecting piece 320 are connected with the input shaft 210 and the output shaft 220 of the speed reducer 200 respectively, and the speed reducer 200 is rigidly installed in the first columnar part, and then the gravity of the first columnar part and the speed reducer 200 and the friction nanogenerator 400 and other components is overcome by the fixed platform. At the same time, the second columnar part 120 is arranged on one side of the first columnar part 110, and by arranging the mass of the second columnar part 120, the center of gravity of the ocean energy power generation device is arranged on the side of the central axis (the input shaft 210 and the output shaft 220 of the speed reducer 200) of the first columnar part 110 close to the second columnar part 120. Under the action of the gravity of the second columnar part 120, the first columnar part 110 will have a tendency to rotate to one side. It can be understood that if no other force supports the second columnar part 120, the second columnar part 120 will rotate to the directly below the first columnar part 110, at this time, the gravity of the two is overcome by the fixed platform. Further, when installing the ocean energy power generation device, the height difference between the first columnar part 110 and the water surface needs to be appropriately set, so that the second columnar part 120 can float on the water surface and not be directly below the first columnar part 110, at this time, the gravity of the second columnar part 120 is overcome by the buoyancy of water, the first columnar part 110 will not have a tendency to rotate to one side, and the ocean energy power generation device is in a stable state. When the ocean generates waves, the second columnar part 120 will fluctuate with the water surface, so that the first columnar part 110 will produce a certain angle of reciprocating rotation, so as to convert the ocean wave energy into the kinetic energy of the ocean energy power generation device, and then further convert it into electric energy through the friction nanogenerator 400.

[0047] It should be noted that, in order to make the center of gravity of the ocean energy power generation device obviously on the side of the central axis of the first columnar part 110 close to the second columnar part 120, a counterweight can be arranged in the second columnar part 120, so as to increase the mass of the second columnar part 120, but the overall average density of the second columnar part 120 needs to be less than the density of ocean water.

[0048] During the use of the marine energy power generation device, the second columnar part 120 will be raised and lowered with the water surface, so that the first columnar part 110 produces a certain angle of reciprocating rotation. Specifically, when the sea wave excitation is not coming, the second columnar part 120 is at a lower position on one side of the first columnar part 110. When the sea wave excitation comes, the second columnar part 120 is raised with the water surface, so that the first columnar part 110 produces rotation, the rotation angle is related to the intensity of the wave excitation, and the rotation direction is related to the initial installation state of the marine energy power generation device. For example, in a reference coordinate system, the second columnar part 120 is below the left side of the first columnar part 110, and when the sea wave excitation comes, the first columnar part 110 will produce a clockwise rotation.

[0049] The rotation direction of the first columnar portion 110 when the sea wave excitation comes can be defined as the first direction with the fixed platform as the reference. Since the decelerator 200 is rigidly connected with the first columnar portion 110, the decelerator 200 also synchronously generates rotation. Meanwhile, the input shaft 210 of the decelerator 200 is connected with the first connecting piece 310, and the first connecting piece 310 is connected with the fixed platform. The first connecting piece 310 does not generate rotation, and thus the rotation of the output shaft 220 of the decelerator 200 is limited by the first connecting piece 310. The input shaft 210 of the decelerator 200 generates at most single direction rotation relative to the first connecting piece 310. Specifically, the input shaft 210 of the decelerator 200 can be rigidly connected with the first connecting piece 310, or can be connected with the first connecting piece 310 through the first one-way bearing 230. It should be noted that if the input shaft 210 of the decelerator 200 has single direction rotation relative to the first connecting piece 310, when the ocean energy power generation device is installed, it is necessary to ensure that the rotation direction is the second direction opposite to the first direction. At this time, under the limitation of the first connecting piece 310, the input shaft 210 of the decelerator 200 does not rotate with the decelerator 200, and thus the input shaft 210 of the decelerator 200 has the second direction rotation relative to the decelerator 200. The output torque of the decelerator 200 is smaller than the input torque, that is, the rotation speed or rotation stroke of the output shaft 220 of the decelerator 200 is greater than that of the input shaft 210, so that the output shaft 220 of the decelerator 200 has the second direction rotation relative to the fixed platform, and the output shaft 220 of the decelerator 200 synchronously rotates the first rotor 420. Meanwhile, the first stator 410 is rigidly connected with the first columnar portion 110, and the two have synchronous rotation. At this time, the first stator 410 has the first direction rotation relative to the fixed platform. Therefore, the first stator 410 and the first rotor 420 can generate friction, and thus convert kinetic energy into electric energy. Further, when the sea wave excitation disappears, under the action of the gravity of the second columnar portion 120, the second columnar portion 120 descends with the water surface, and the first columnar portion 110 generates the second direction rotation, synchronously driving the decelerator 200 and the first stator 410 to generate the second direction rotation. In the embodiment in which the input shaft 210 of the decelerator 200 is rigidly connected with the first connecting piece 310, the input shaft 210 of the decelerator 200 has the first direction rotation relative to the decelerator 200, and thus the output shaft 220 of the decelerator 200 and the first rotor 420 have the first direction rotation relative to the fixed platform. Therefore, the first stator 410 and the first rotor 420 generate friction again, and thus convert kinetic energy into electric energy.In the embodiment where the input shaft 210 of the speed reducer 200 is connected with the first connecting member 310 through the first one-way bearing 230, the input shaft 210 of the speed reducer 200 can generate rotation in the second direction relative to the first connecting member 310, and then the speed reducer 200 can drive the input shaft 210 to rotate synchronously, and the output shaft 220 of the speed reducer 200 can also rotate synchronously with the speed reducer 200. At this time, since the first stator 410 and the second rotor 520 are both rotating synchronously with the first columnar portion 110, no friction occurs between them.

[0050] The difference between the above two embodiments is that, in the former embodiment, the first stator 410 and the first rotor 420 generate electricity by friction when the sea wave excitation comes and goes, thereby having better electricity generation efficiency. However, considering that the relative friction directions of the first stator 410 and the first rotor 420 are opposite during the two friction electricity generation processes, the friction layer on the first stator 410 and the first rotor 420 can be greatly worn. In order to prolong the service life of the ocean energy power generation device, the latter embodiment can be used. In the latter embodiment, the first stator 410 and the first rotor 420 generate electricity by friction only when the sea wave excitation comes, and then the relative friction direction is the same each time, that is, the first rotor 420 has the second direction of rotation relative to the first stator 410, thereby greatly reducing the wear of the friction layer on the first stator 410 and the first rotor 420, and prolonging the service life of the ocean energy power generation device.

[0051] In summary, in the above technical solution, the columnar shell 100 and the speed reducer 200 of a specific shape can convert ocean wave energy into kinetic energy and transmit it to the friction nanogenerator 400, and the friction nanogenerator 400 converts the kinetic energy into electrical energy. Among them, the key is that through the speed reducer 200 with an output torque smaller than an input torque, the small oscillation of ocean waves can be converted into a larger relative rotation stroke between the stator and the rotor in the friction nanogenerator 400, which is much larger than the oscillation amplitude of ocean waves. When the friction nanogenerator 400 is directly placed in the ocean, the relative rotation stroke or the relative displacement stroke between the stator and the rotor in the friction nanogenerator 400 is basically the same as the oscillation amplitude of ocean waves. Therefore, the ocean energy power generation device provided by the present application has higher ocean energy conversion efficiency, and solves the problem of low energy conversion efficiency of the existing ocean energy power generation device.

[0052] FIG. 4 is a structure diagram of the first stator in some embodiments of the present application, and FIG. 5 is a structure diagram of the first rotor in some embodiments of the present application.

[0053] Referring to FIG. 3, FIG. 4 and FIG. 5, in some embodiments, the first stator 410 includes a plurality of pairs of metal electrode discs 411 coaxially and spaced apart, each pair of metal electrode discs 411 being rigidly connected to the second cylindrical portion 120; the first rotor 420 includes a plurality of acrylic discs 421 coaxial with the metal electrode discs 411, each of the plurality of acrylic discs 421 being rigidly connected to and coaxial with the output shaft 220 of the speed reducer 200, each of the plurality of acrylic discs 421 being disposed between each pair of metal electrode discs 411.

[0054] In the above embodiments, a specific structure of the friction nanogenerator 400 is provided. The metal electrode discs 411 are generally made of copper, aluminum or other metal with good electrical conductivity, and the friction film is preferably made of a high polymer material with good electronegativity, such as fluorine-containing material, fluorinated isopropylene (FEP), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) and the like. Therefore, in the above embodiments, the material of the metal electrode discs 411 can be copper or aluminum; the material of the first friction film can be polyamide fiber; and the material of the second friction film can be fluorinated isopropylene film, polyvinylidene fluoride or polytetrafluoroethylene.

[0055] In the above embodiments, a specific structure of the friction nanogenerator 400 is provided. The metal electrode discs 411 are generally made of copper, aluminum or other metal with good electrical conductivity, and the friction film is preferably made of a high polymer material with good electronegativity, such as fluorine-containing material, fluorinated isopropylene (FEP), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) and the like. Therefore, in the above embodiments, the material of the metal electrode discs 411 can be copper or aluminum; the material of the first friction film can be polyamide fiber; and the material of the second friction film can be fluorinated isopropylene film, polyvinylidene fluoride or polytetrafluoroethylene.

[0056] In the above specific structure of the friction nanogenerator 400, a plurality of pairs of metal electrode discs 411 are included, one acrylic disc 421 is disposed between each pair of metal electrode discs 411, and the metal electrode discs 411 and the acrylic discs 421 are coaxially arranged, so that the friction nanogenerator 400 has a cylindrical structure as a whole. At this time, the first cylindrical portion can be provided in a cylindrical structure, or a cylindrical portion can be provided in the inner cavity to accommodate the friction nanogenerator 400.

[0057] For the metal electrode discs 411, a part of the nylon film can be attached to the back of the metal electrode discs 411 (the side away from the acrylic disc 421) by double-sided adhesive, and another part of the nylon film can be attached to the front of the metal electrode discs 411 (the side close to the acrylic disc 421) through the slots on the metal electrode discs 411, which serves to supplement the electric charge on the second friction film on the acrylic disc 421.

[0058] Further specifically, the diameter of the acrylic disc 421 is smaller than the diameter of the metal electrode disc 411, the plurality of metal electrode discs 411 are rigidly connected by the plurality of fixing rods 413, at least one end of the plurality of fixing rods 413 is rigidly connected with the first columnar portion 110, and the plurality of fixing rods 413 are located at the circumferential side of the acrylic disc 421; the acrylic disc 421 is rigidly sleeved on the output shaft 220 of the speed reducer 200 through the lock shaft device 423.

[0059] For the two adjacent pairs of metal electrode discs 411, there are two opposite metal electrode discs 411, that is, the latter metal electrode disc 411 in the former pair and the former metal electrode disc 411 in the latter pair. An acrylic washer can be arranged between the two metal electrode discs 411, so as to separate the two metal electrode discs 411 and control the interval of the two metal electrode discs 411. When the size of each acrylic washer is the same, the interval of any two adjacent pairs of metal electrode discs 411 can be ensured to be the same. Meanwhile, for each pair of metal electrode discs 411, a first rubber washer can be arranged to separate the two metal electrode discs 411, the first rubber washer can be sleeved on the fixing rod 413, and the two ends thereof are in contact with the two metal electrode discs 411, respectively. For each acrylic disc 421, the lock shaft device 423 can be rigidly connected with the output shaft 220 of the speed reducer 200. Specifically, the inner side of the acrylic disc 421 can be rigidly connected with the outer side of one end of the lock shaft device 423, and the lock shaft device 423 is rigidly sleeved on the output shaft 220 of the speed reducer 200. The other end of the lock shaft device 423 rigidly connected with the former acrylic disc 421 can be in contact with the latter acrylic disc 421, and by using the lock shaft device 423 with the same specification, the interval of any two acrylic discs 421 can be ensured to be the same. At this time, the lock shaft device 423 penetrates through the metal electrode disc 411 (the two opposite metal electrode discs 411 mentioned above) between the two acrylic discs 421, and therefore the inner diameter of the metal electrode disc 411 should be larger than the outer diameter of the lock shaft device 423. For the acrylic disc 421 of each pair of metal electrode discs 411, it should be located in the middle of the two metal electrode discs 411, and the same rubber coil can be arranged between the metal electrode disc 411 and the acrylic disc 421 to meet the above requirement. The rubber coil is sleeved on the lock shaft device 423, and the outer diameter thereof should be slightly larger than the inner diameter of the metal electrode disc 411 (for example, 2 mm larger), so that the rubber coil can be in contact with the metal electrode disc 411 and the acrylic disc 421, respectively, to play a spacing role, and meanwhile, the rubber coil will not generate large friction with the metal electrode disc 411.

[0060] As mentioned above, the specific structure of a friction nanogenerator 400 is mainly introduced. It should be noted that the above structure is only illustrative and does not limit the structure of the friction nanogenerator 400 in the present application. The focus of the present application is that, by means of the speed reducer 200 with the output torque smaller than the input torque, the small oscillation of the ocean wave can be converted into a larger relative rotation stroke between the stator and the rotor in the friction nanogenerator 400. Therefore, it can be understood that for any structure of the friction nanogenerator 400, as long as the rotor thereof is rigidly connected with the output shaft 220 of the speed reducer 200 and the stator thereof is rigidly connected with the first cylindrical portion 110, the power generation efficiency of the friction nanogenerator 400 can be improved.

[0061] FIG. 6 is a structural diagram of an electromagnetic generator in some embodiments of the present application.

[0062] Referring to FIGS. 2 and 6, in some embodiments thereof, the ocean energy power generation device further comprises an electromagnetic generator 500 installed in the first cylindrical portion 110, the electromagnetic generator 500 comprising a second stator 510 and a second rotor 520, the second stator 510 being rigidly connected with the first cylindrical portion 110, and the second rotor 520 being sleeved on the output shaft 220 of the speed reducer 200 through a second one-way bearing 521, the second one-way bearing 521 being opposite to the rotation locking direction of the first one-way bearing 230.

[0063] In this embodiment, the electromagnetic generator 500 is also installed in the first cylindrical portion 110, wherein the second rotor 520 is coaxial with the first rotor 420 in the friction nanogenerator 400 and is installed on the output shaft 220 of the speed reducer 200. The difference is that the second rotor 520 is sleeved on the output shaft 220 of the speed reducer 200 through the second one-way bearing 521.

[0064] It should be noted that when the ocean energy power generation device is installed, the rotatable direction (the rotation direction of the inner ring relative to the outer ring) of the second one-way bearing 521 needs to be ensured to be the first direction. Further, in the embodiment where the input shaft 210 of the speed reducer 200 is connected with the first connecting piece 310 through the first one-way bearing 230, since the rotatable direction of the first one-way bearing 230 is the second direction, the rotation locking direction of the second one-way bearing 521 is opposite to that of the first one-way bearing 230.

[0065] Continuing to take the fixed platform as a reference, the rotation direction of the first columnar portion 110 when the sea wave excitation arrives is defined as a first direction. When the sea wave excitation arrives, the output shaft 220 of the speed reducer 200 generates rotation in a second direction, at which time the second one-way bearing 521 is in a rotational locking state, and the inner and outer rings thereof are fixed in relative poses, so that the output shaft 220 of the speed reducer 200 can drive the second rotor 520 to rotate, and the electromagnetic generator 500 can generate electric energy. When the sea wave excitation recedes, in the process of falling of the second columnar housing 100, the first columnar housing 100 drives the speed reducer 200 to rotate synchronously in the second direction, and the second rotor 520 continues to rotate in the second direction under the action of rotational inertia, and the rotational speed is relatively fast. Regardless of whether the output shaft 220 of the speed reducer 200 rotates in the first direction or rotates in the second direction synchronously with the first columnar housing 100 (corresponding to different embodiments), the second rotor 520 has rotation in the second direction relative to the output shaft 220 of the speed reducer 200, at which time the second one-way bearing 521 is not in a locking state, and thus does not limit the rotation of the second rotor 520 in the second direction, and thus the second rotor 520 can also rotate in the second direction relative to the second stator 510 under the action of inertia, so that the electromagnetic generator 500 can continue to generate electric energy.

[0066] In summary, the electromagnetic generator 500 can generate electric energy when the sea wave excitation arrives and recedes, thereby further improving the overall power generation efficiency of the ocean energy power generation device.

[0067] Specifically, the second stator 510 is in an annular structure, the second rotor 520 is in a disc structure, the second rotor 520 is coaxial with the second stator 510 and is located on the inner side of the second stator 510. At this time, N-pole magnets and S-pole magnets can be alternately arranged on the outer side of the second rotor 520, and the second stator 510 can be provided with a conductive coil. The installation positions of the magnets and the conductive coil can be interchanged, and mainly the magnetic flux in the conductive coil can change with the rotation of the second rotor 520.

[0068] In some structures, the cross section of the first columnar portion 110 is smaller than the cross section of the second columnar portion 120, and the first columnar portion 110 and the second columnar portion 120 are in an integrated structure. The integrated structure can make the stability of the columnar housing 100 stronger. It should be noted that the shape of the columnar housing 100 is diversified, and mainly needs to ensure that the center of gravity of the ocean energy power generation device is located on the side of the central axis of the first columnar portion 110 close to the second columnar portion 120.

[0069] As described above, the ocean energy power generation device provided by the present application has been described through a plurality of embodiments. It should be noted that the different embodiments described above can be combined to form new embodiments without mutual exclusion in function or structure.

[0070] For example, in a specific embodiment, the marine energy power generation device comprises a columnar shell 100, a speed reducer 200, a connecting assembly 300, a friction nanometer generator 400 and an electromagnetic generator 500.

[0071] The columnar shell 100 comprises a first columnar part 110 and a second columnar part 120 rigidly connected, and the second columnar part 120 is located at one side of the first columnar part 110. The speed reducer 200 is rigidly installed in the first columnar part 110 and coaxial with the first columnar part 110, and the output torque of the speed reducer 200 is smaller than the input torque. The input shaft 210 and the output shaft 220 of the speed reducer 200 respectively penetrate the two end walls of the first columnar part 110. The connecting assembly 300 comprises a first connecting piece 310 and a second connecting piece 320, and the first connecting piece 310 and the second connecting piece 320 are respectively located outside the two end walls of the first columnar part 110. The first connecting piece 310 is sleeved on the input shaft 210 of the speed reducer 200 through the first one-way bearing 230, and the second connecting piece 320 is rotatably sleeved on the output shaft 220 of the speed reducer 200. The friction nanometer generator 400 is installed in the first columnar part 110, and the friction nanometer generator 400 comprises a first stator 410 and a first rotor 420. The first stator 410 is rigidly connected with the first columnar part 110, and the first rotor 420 is rigidly connected with the output shaft 220 of the speed reducer 200 and coaxial with the output shaft 220. The electromagnetic generator 500 comprises a second stator 510 and a second rotor 520. The second stator 510 is rigidly connected with the first columnar part 110, and the second rotor 520 is sleeved on the output shaft 220 of the speed reducer 200 through the second one-way bearing 521. The rotation locking direction of the second one-way bearing 521 is opposite to that of the first one-way bearing 230. The first stator 410 comprises a plurality of pairs of metal electrode discs 411 which are coaxial and spaced apart. Each pair of metal electrode discs 411 is rigidly connected with the second columnar part 120. The first rotor 420 comprises a plurality of acrylic discs 421 which are coaxial with the metal electrode discs 411. Each acrylic disc 421 is rigidly connected with the output shaft 220 of the speed reducer 200 and coaxial with the output shaft 220. Each acrylic disc 421 is arranged between each pair of metal electrode discs 411. The side of each metal electrode disc 411 close to the acrylic disc 421 is provided with a plurality of notches. The side of each metal electrode disc 411 away from the acrylic disc 421 and the notch are attached with a first friction film. The two sides of each acrylic disc 421 are attached with a second friction film. The second stator 510 is in the form of a ring, and the second rotor 520 is in the form of a disc. The second rotor 520 is coaxial with the second stator 510 and located at the inner side of the second stator 510.

[0072] It should be understood that the detailed description and specific examples described herein are intended for purposes of illustration only and are not intended to limit the scope of the present application. By virtue of the embodiments provided herein, those skilled in the art will clearly understand that all other embodiments that can be derived from the content of the present application, without expressing creative labor, all belong to the scope of the present application.

[0073] Obviously, the drawings in the present application are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar situations according to these drawings without creative labor. In addition, it can be understood that although the work done in the development process may be complex and long, for those skilled in the art, some design, manufacture or production changes according to the technical content disclosed in the present application are only routine technical means and should not be regarded as insufficient disclosure of the present application.

Claims

1. A marine energy power plant, c h a r a c t e r i s e d in that The marine energy power generation device comprises: a columnar shell (100) comprising a first columnar part (110) and a second columnar part (120) rigidly connected, the second columnar part (120) being on one side of the first columnar part (110); a reducer (200) rigidly mounted in the first columnar part (110) and coaxial with the first columnar part (110), the output torque of the reducer (200) being smaller than the input torque, the input shaft (210) and the output shaft (220) of the reducer (200) penetrating through the two end walls of the first columnar part (110) respectively; a connecting assembly (300) comprising a first connecting piece (310) and a second connecting piece (320), the first connecting piece (310) and the second connecting piece (320) being respectively outside the two end walls of the first columnar part (110), the first connecting piece (310) being sleeved on the input shaft (210) of the reducer (200), the input shaft (210) of the reducer (200) generating at most single direction rotation relative to the first connecting piece (310), the second connecting piece (320) being rotatably sleeved on the output shaft (220) of the reducer (200); a friction nanogenerator (400) mounted in the first columnar part (110), the friction nanogenerator (400) comprising a first stator (410) and a first rotor (420), the first stator (410) being rigidly connected with the first columnar part (110), the first rotor (420) being rigidly connected with the output shaft (220) of the reducer (200) and coaxial with the output shaft (220).

2. The ocean energy power plant according to claim 1, characterized in that, The input shaft (210) of the reducer (200) is rigidly connected with the first connecting piece (310).

3. The ocean energy power plant according to claim 1, characterized in that, The input shaft (210) of the reducer (200) is connected with the first connecting piece (310) through a first one-way bearing (230).

4. The ocean energy power plant according to claim 3, characterized in that, The first stator (410) comprises a plurality of pairs of metal electrode discs (411) arranged coaxially and spaced apart, each pair of the metal electrode discs (411) being rigidly connected with the second columnar part (120); The first rotor (420) comprises a plurality of acrylic discs (421) coaxial with the metal electrode discs (411), each of the acrylic discs (421) being rigidly connected with the output shaft (220) of the reducer (200) and coaxial with the output shaft (220), each of the acrylic discs (421) being arranged between each pair of the metal electrode discs (411).

5. The ocean energy power plant according to claim 4, characterized in that, The metal electrode disc (411) is provided with a plurality of notches on the side close to the acrylic disc (421), and the metal electrode disc (411) is attached with a first friction film on the side away from the acrylic disc (421) and in the notches; The acrylic disc (421) is attached with a second friction film on both sides.

6. The ocean energy power plant according to claim 5, characterized in that, The material of the metal electrode disc (411) is copper or aluminum; The material of the first friction film is polyamide fiber; The material of the second friction film is fluorinated isopropylene film, polyvinylidene fluoride or polytetrafluoroethylene.

7. The ocean energy power plant according to claim 5, characterized in that, The diameter of the sub-acrylic disc (421) is smaller than that of the metal electrode disc (411), a plurality of the metal electrode discs (411) are rigidly connected by a plurality of fixing rods (413), at least one end of the plurality of fixing rods (413) is rigidly connected with the first columnar part (110), and the plurality of fixing rods (413) are located at the periphery of the sub-acrylic disc (421).

8. The ocean energy power plant of claim 5, wherein, The sub-acrylic disc (421) is rigidly sleeved on the output shaft (220) of the speed reducer (200) by a lock shaft device (423).

9. The ocean energy power plant of claim 1, wherein, The marine energy power generation device further comprises: An electromagnetic generator is installed in the first columnar part (110), the electromagnetic generator comprises a second stator and a second rotor, the second stator is rigidly connected with the first columnar part (110), and the second rotor is sleeved on the output shaft (220) of the speed reducer (200) by a second one-way bearing.

10. The ocean energy power plant according to claim 9, characterized in that, The second stator is in an annular structure, the second rotor is in a disc structure, the second rotor is coaxial with the second stator and located on the inner side of the second stator.

11. The ocean energy power plant of claim 1, wherein, The cross section of the first columnar part (110) is smaller than that of the second columnar part (120).

12. The ocean energy power plant of claim 1, wherein, The first columnar part (110) and the second columnar part (120) are in an integrated structure.

13. The ocean energy power plant of claim 1, wherein, The density of the second columnar part (120) is smaller than that of sea water.

14. The ocean energy power plant of claim 7, wherein, Each pair of metal electrode discs (411) is separated by a first rubber gasket.

15. The ocean energy power plant according to claim 14, characterized in that, The first rubber gasket is sleeved on the fixing rod (413) and in contact with two metal electrode discs (411) at both ends.

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