Magnetic rotation bistable and double-floating-body wave energy converter

Abstract

The invention discloses a magnetic rotation bistable and double-floating-body wave energy converter. Comprising a buoy, an upper floater, a lower floater, a guide mechanism, a connecting support and an energy conversion mechanism, wherein the buoy is sleeved with the upper floater which can slide in the axial direction of the buoy, the lower floater is connected with the other end of the buoy, the guide mechanism is arranged in the buoy and can move in the axial direction of the buoy, the connecting support is connected with the upper floater and the guide mechanism, and the energy conversion mechanism is fixed in the lower floater. A bistable mechanism; and a power generation mechanism. When the upper floater moves upwards / downwards, the guide mechanism drives the rotor of the energy conversion mechanism to move upwards / downwards, the rotation directions of the rotors of the two sets of magnetic lead screws are opposite, and under the action of a one-way bearing, an intermediate gear performs one-way rotation movement of clockwise rotation or anticlockwise rotation. The intermediate gear drives the bistable gear and the generator gear to rotate, and the rotation directions of the generator gear are continuous and the same. According to the magnetic rotation bistable and double-floating-body wave energy converter, non-contact magnetic coupling force between the magnetic lead screws is utilized for energy transmission, and the reliability of a mechanism is ensured under the effect of achieving high thrust.

Description

Technical Field

[0001] The present invention relates to the technical field of energy converters, and in particular to a magnetic rotation bistable and double-floating wave energy converter. Background Art

[0002] Energy is the key cornerstone that supports human society to maintain life and promote the development process. At present, the world is facing the dual challenges of traditional energy shortage and climate and environmental changes. Therefore, the development and utilization of renewable energy has become an important strategy for global green and low-carbon development. Wave energy, as a green, clean, renewable marine energy, has attracted more and more attention due to its large reserves and high energy density. Wave energy power generation technology is currently widely studied. If wave energy can be reasonably developed and utilized, it will be of great significance to alleviate energy crises and climate change.

[0003] Ocean wave energy is mostly distributed in the low-frequency band of about 0.1 Hz, but the energy conversion efficiency of traditional wave power generation devices is low at low frequencies. The nonlinear stiffness mechanism can effectively improve the energy capture performance in the low-frequency region of waves.

[0004] Although the traditional mechanical transmission energy conversion mechanism has a simple structure, its development is restricted by its short life in the marine environment. In addition, some devices may involve the discharge and treatment of liquids or gases, which requires consideration of environmental protection issues. The direct-drive energy conversion mechanism still faces technical challenges in achieving high-efficiency energy conversion when dealing with changing wave conditions. Therefore, it is of great significance to design an efficient and reliable energy conversion mechanism to stably extract energy from waves. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a magnetic rotation bistable and dual-floating wave energy converter, which utilizes the non-contact magnetic coupling force between magnetic screws to transfer energy, ensures the reliability of the mechanism while achieving high thrust, and introduces a magnetic rotation bistable mechanism to improve the problem of low conversion efficiency of traditional wave energy converters at low frequencies.

[0006] The technical solution of the present invention is as follows:

[0007] A magnetic rotation bistable and double-floating wave energy converter, comprising a buoy, an upper buoy sleeved outside the buoy and slidable along the axial direction of the buoy, a lower buoy connected to the other end of the buoy, a guide mechanism arranged in the buoy and movable along the axial direction of the buoy, a connecting bracket connected to the upper buoy and the guide mechanism, an energy conversion mechanism fixed in the lower buoy, a bistable mechanism and a power generation mechanism;

[0008] The energy conversion mechanism includes two sets of magnetic screws, a gear set, and a one-way bearing. The magnetic screw includes a mover and a rotor. The mover is fixedly connected to the guide mechanism, and the spiral directions of the two magnetic screws are opposite. The gear set includes a first gear sleeved outside the rotor of the magnetic screw and an intermediate gear meshing with the first gear. The one-way bearing is sleeved between the rotor and the first gear.

[0009] The bistable mechanism comprises a bistable fixing frame, a first magnetic rotation bistable and a second magnetic rotation bistable arranged on the bistable fixing frame and spaced apart, a bistable rotating shaft rotatably connected to the first magnetic rotation bistable and the second magnetic rotation bistable, and a bistable gear arranged at one end of the bistable rotating shaft, and the intermediate gear is meshed with the bistable gear;

[0010] The power generation mechanism includes a generator, a flywheel shaft connected to the generator through a coupling, a flywheel provided on the flywheel shaft, a generator gear transmission shaft connected to the flywheel shaft, and a generator gear connected to the generator gear transmission shaft, and the intermediate gear is meshed with the generator gear;

[0011] When the upper float moves upward / downward, the guide mechanism drives the mover of the energy conversion mechanism to move upward / downward, and the rotors of the two sets of magnetic screws rotate in opposite directions. Under the action of the one-way bearing, the intermediate gear performs a unidirectional rotation motion of clockwise or counterclockwise rotation, and the intermediate gear drives the bistable gear and the generator gear to rotate, and the rotation direction of the generator gear is continuously the same.

[0012] Furthermore, the mover comprises a mover core, a first magnetic strip and a second magnetic strip which are attached to the outer wall of the mover core and are spirally distributed in parallel, wherein the first magnetic strip and the second magnetic strip are radially magnetized and have opposite polarities; the mover core is connected to the guide mechanism;

[0013] The rotor comprises a rotor core, a third magnetic strip and a fourth magnetic strip which are attached to the inner wall of the rotor core and are arranged in parallel in a spiral shape, wherein the third magnetic strip and the fourth magnetic strip are both radially magnetized and have opposite polarities; the rotor is sleeved outside the first magnetic strip and the second magnetic strip;

[0014] The spiral directions of the magnetic strips of the two sets of magnetic screws are opposite.

[0015] Furthermore, the lower float is provided with an upper fixing plate, an intermediate fixing plate, a lower fixing plate and a mover connecting plate which are parallel and spaced from top to bottom, the upper fixing plate and the intermediate fixing plate are connected by a connecting rod, and the first gear, the intermediate gear, the bistable gear and the generator gear are provided between the upper fixing plate and the intermediate fixing plate, and supported on the intermediate fixing plate;

[0016] The movers of the two groups of magnetic lead screws penetrate the upper fixed plate, the middle fixed plate and the lower fixed plate, one end of which is connected to the guide mechanism, and the other end of which is connected to the mover connecting plate.

[0017] Furthermore, it also includes a buffer mechanism arranged in the lower float, the buffer mechanism includes a sleeve and a buffer spring arranged in the sleeve, the sleeve is connected to the lower fixed plate, the buffer spring is divided into two groups, which are respectively installed at the two ends of the sleeve, and the mover connecting plate is arranged in the sleeve and located between the two groups of buffer springs.

[0018] Furthermore, the first magnetic rotation bistable and the second magnetic rotation bistable respectively include a shell with a accommodating space, a clamping plate arranged on the side wall of the shell, an outer magnetic ring limited by the clamping plate, an inner magnetic ring spaced apart from the outer magnetic ring, and a first chuck and a second chuck for positioning the inner magnetic ring, the first chuck and the second chuck are connected to the bistable rotating shaft, and when the bistable rotating shaft rotates, the first chuck and the second chuck are driven to rotate, so that the inner magnetic ring rotates relative to the outer magnetic ring.

[0019] Furthermore, the inner magnetic ring and the outer magnetic ring are both composed of three pairs of arc-shaped permanent magnets arranged in NS, and the three pairs of arc-shaped permanent magnets are distributed in a circle;

[0020] When the bistable shaft is not subjected to external torque, the outer magnetic ring and the inner magnetic ring form NS pole pairs;

[0021] When the bistable shaft is subjected to external torque, the outer magnetic ring and the inner magnetic ring first form NN pole pairs and then form NS pole pairs.

[0022] Furthermore, the first chuck and the second chuck are symmetrically distributed, a boss is provided on the outer side of the bistable shaft, and the first chuck and the second chuck are respectively clamped with two ends of the boss.

[0023] Furthermore, the bistable shaft is connected to the bistable fixing frame and the shell through angular contact bearings, and the bistable shaft is segmented, and the bistable shaft connected to the first magnetic rotation bistable is connected to the bistable shaft connected to the second magnetic rotation bistable through a coupling.

[0024] Furthermore, the guide mechanism includes a push rod, a guide fixing plate connected to the middle part of the push rod, and a guide connecting plate connected to one end of the push rod. The other end of the push rod passes through the top cover of the float and is connected to the connecting bracket. A sliding groove is provided on the inner side wall of the float. A slider that cooperates with the sliding groove is provided on the guide connecting plate. When the guide mechanism moves upward / downward, the slider slides in the sliding groove.

[0025] Furthermore, the connecting bracket includes a support rod and a connecting plate, one end of the support rod is connected to the upper float, and the other end is connected to the connecting plate, the connecting plate is arranged parallel to and spaced apart from the top cover of the buoy, and the push rod is fixedly connected to the connecting plate.

[0026] Compared with the prior art, the magnetic rotation bistable and double-floating wave energy converter provided by the present invention has the following beneficial effects:

[0027] 1. The magnetic rotation bistable and double-floating wave energy converter provided by the present invention utilizes the non-contact magnetic coupling force between the magnetic screws to transfer energy, ensures the reliability of the mechanism while achieving high thrust, and converts the linear motion of the float into rotational motion through the two magnetic screws; combines the one-way bearing with the gear to form a one-way gear mechanism, so that the bidirectional rotational motion is converted into a unidirectional rotational motion, so that the rotation direction of the generator gear is continuously the same, thereby improving the efficiency of energy conversion and the stability of power generation.

[0028] 2. The magnetic rotation bistable and dual-floating wave energy converter provided by the present invention introduces a magnetic rotation bistable mechanism, which produces a negative stiffness effect during operation, can improve the energy conversion efficiency within a certain range of motion, and can effectively improve the problem of low conversion efficiency of the device at low frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 It is a schematic structural diagram of a magnetic rotation bistable and double-floating wave energy converter provided by the present invention;

[0031] Figure 2 yes Figure 1 A partial structural schematic diagram of a magnetic rotation bistable and dual-floating wave energy converter is shown;

[0032] Figure 3 yes Figure 1 Schematic diagram of the internal structure of the lower float in the magnetic rotation bistable and double-floating wave energy converter shown;

[0033] Figure 4 yes Figure 3 A partial structural schematic diagram of the lower float shown;

[0034] Figure 5 yes Figure 2A schematic diagram of the connection between the guide mechanism and other components in the magnetic rotation bistable and double-floating wave energy converter shown;

[0035] Figure 6 yes Figure 2 The position relationship diagram of the energy conversion mechanism, the bistable mechanism and the power generation mechanism in the magnetic rotation bistable and double-floating wave energy converter shown;

[0036] Figure 7 yes Figure 6 A schematic diagram of a magnetic screw in an energy conversion mechanism shown;

[0037] Figure 8 yes Figure 6 Schematic diagram of some structures;

[0038] Fig. 9 yes Figure 6 A partial structural schematic diagram of the bistable mechanism shown;

[0039] Fig.10 yes Fig. 9 A schematic structural diagram of a bistable fixing frame in a bistable mechanism shown;

[0040] Fig.11 yes Fig. 9 A schematic diagram of the internal structure of the first magnetic rotation bistable state / the second magnetic rotation bistable state in the bistable mechanism shown;

[0041] Fig.12 yes Fig.11 A schematic diagram of the structure of the bistable shaft;

[0042] Fig.13 yes Fig.11 Schematic diagram of the magnetic poles of the inner and outer magnetic rings;

[0043] Fig.14 yes Figure 2 The schematic diagram of the structure of the power generation mechanism in the magnetic rotation bistable and double-floating wave energy converter shown;

[0044] Fig.15 It is a structural schematic diagram of the buffer mechanism in the present invention. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings.

[0046] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as there is no conflict between them.

[0047] Please refer to Figure 1 and Figure 2 ,in Figure 1 It is a schematic diagram of the structure of the magnetic rotation bistable and double floating wave energy converter provided by the present invention. Figure 2 yes Figure 1 The partial structural schematic diagram of the magnetic rotation bistable and double-floating wave energy converter shown in the figure, the magnetic rotation bistable and double-floating wave energy converter of the present invention includes a buoy 1, an upper buoy 2 mounted outside the buoy 1, a lower buoy 3 connected to the other end of the buoy 1, a guide mechanism 4 arranged in the buoy 1, a connecting bracket 5 connected to the upper buoy 2 and the guide mechanism, and an energy conversion mechanism 6, a bistable mechanism 7, a power generation mechanism 8 and a buffer mechanism 9 fixed in the lower buoy 3.

[0048] The buoy 1 is a cylindrical cylinder, with a top cover 11 at its top, and a bottom end connected to the lower float 3 and communicated with the interior of the lower float. Specifically, a connecting platform is provided at the bottom end of the buoy, rigidly connected to the lower float 3, and after connection, the buoy and the lower float are communicated to form a closed space.

[0049] The upper float 2 is slidably connected to the buoy 1. Under the excitation of the waves, the upper float 2 slides up and down along the buoy axis. The upper float 2 is in the shape of an inverted truncated cone, and its structure meets the requirements of marine mechanical engineering.

[0050] Please combine Figure 3 and Figure 4 ,in Figure 3 yes Figure 1 Schematic diagram of the internal structure of the lower float in the magnetic rotation bistable and double-floating wave energy converter shown; Figure 4 yes Figure 3The schematic diagram of the partial structure of the lower float shown in the figure. A fixed plate is installed in the lower float 3, which is used to install and fix the energy conversion mechanism 6, the bistable mechanism 7, the power generation mechanism 8 and the buffer mechanism 9. Specifically, it includes: an upper fixed plate 31, an intermediate fixed plate 32, a lower fixed plate 33 and a mover connecting plate 34 which are arranged in sequence from top to bottom and distributed in parallel intervals. During installation, a support block 35 is arranged on the inner wall of the lower float corresponding to the position of the lower fixed plate, and the lower fixed plate 33 is supported on the support block 35 and fixedly connected by bolts; the intermediate fixed plate 32 is connected to the upper fixed plate 31 by a connecting protrusion 36 fixed to the inner wall of the lower float, wherein a plurality of connecting columns 321 are arranged around the intermediate fixed plate 32, and the connecting columns 321 are fixedly connected to the connecting protrusion 36 by bolts; since the gap between the upper fixed plate 31 and the intermediate fixed plate 32 is small, the connecting protrusion 36 can be used as a support member of the upper fixed plate 31, and in order to maintain the stability of the upper fixed plate 31, the upper fixed plate 31 and the intermediate fixed plate 32 are connected by a connecting rod 37.

[0051] See also Figure 5 ,yes Figure 2 The schematic diagram of the connection between the guide mechanism and other components in the magnetic rotation bistable and double-floating wave energy converter shown. The guide mechanism 4 includes a push rod 41, a guide fixing plate 42 connected to the middle of the push rod 41, and a guide connecting plate 43 connected to one end of the push rod 41. The guide fixing plate 42, the guide connecting plate 43 and the top cover 11 of the buoy 1 are parallel. The other end of the push rod 41 passes through the top cover 11 of the buoy and is connected to the connecting bracket 5. A slide groove 12 is provided on the inner side wall of the buoy 1. A slider 44 that cooperates with the slide groove is provided on the guide connecting plate 43. When the guide mechanism 4 moves up / down, the slider 44 slides in the slide groove 12. In order to maintain the smooth operation of the guide mechanism 4 in the buoy, preferably, at least two slide grooves are provided on the inner side wall of the buoy, and the two slide grooves are symmetrically distributed. Correspondingly, two sliders are symmetrically distributed on the guide connecting plate 43. In addition, the number of slide groove / slider groups can be three or four.

[0052] Specifically, there are two push rods 41, both ends of which are provided with threads and fixedly connected to the guide connecting plate 43 through threaded nuts. Through holes corresponding to the number of push rods are provided on the guide fixing plate 42 and the top cover 11 of the buoy, and linear bearings are provided at the positions of the through holes, and the push rods 41 pass through the linear bearings. The linear bearings provide stable guidance to ensure that the push rods maintain linear motion during movement, prevent deviation, and affect subsequent energy transmission.

[0053] The connecting bracket 5 includes a support rod 51 and a connecting plate 52. The connecting plate 52 is arranged parallel to the top cover 11 of the buoy 2. One end of the support rod 51 is connected to the upper float 2, and the other end is connected to the connecting plate 52. The push rod 41 passes through the top cover 11 of the buoy and is connected to the connecting plate 52. The connection method can be a bolt / nut combination.

[0054] The two ends of the push rod 41 are connected to the connecting plate 52 and the guide connecting plate 43 by bolts / nuts, which is convenient for disassembly and assembly of the structure. In addition, fixed connection methods such as welding can also be used.

[0055] Please refer to Figure 6-Figure 8 ,in Figure 6 yes Figure 2 The position relationship diagram of the energy conversion mechanism, the bistable mechanism and the power generation mechanism in the magnetic rotation bistable and double-floating wave energy converter shown; Figure 7 yes Figure 6 A schematic diagram of a magnetic screw in an energy conversion mechanism shown; Figure 8 yes Figure 6 The energy conversion mechanism 6 includes two sets of magnetic screws 61, a gear set 62, and a one-way bearing 63.

[0056] The magnetic screw 61 includes a mover 611 and a rotor 612, wherein the mover 611 includes a mover core 6111, a first magnetic strip 6112 and a second magnetic strip 6113 that are attached to the outer wall of the mover core and are arranged in parallel in a spiral shape, and the first magnetic strip 6112 and the second magnetic strip 6113 are both radially magnetized and have opposite polarities. The first magnetic strip 6112 and the second magnetic strip 6113 are distributed in the middle section of the mover core, and their lengths are determined according to the range of the movement trajectory of the mover core along the guide mechanism during operation.

[0057] The rotor 612 is sleeved on the mover 611, and includes a rotor core 6121, a third magnetic strip 6122 and a fourth magnetic strip 6123 which are attached to the inner wall of the rotor core 6121 and are arranged in parallel in a spiral shape. The third magnetic strip 6122 and the fourth magnetic strip 6123 are both radially magnetized and have opposite polarities. The third magnetic strip and the fourth magnetic strip are arranged around the first magnetic strip and the second magnetic strip at intervals. The spiral directions of the magnetic strips of the two sets of magnetic screws are opposite.

[0058] The mover core 6111 of the two sets of magnetic screws 61 penetrates the upper fixed plate 31, the middle fixed plate 32, and the lower fixed plate 33, one end is connected to the guide connecting plate 43 of the guide mechanism, and the other end is connected to the mover connecting plate 34, and the connection method can be a bolt / nut matching connection. When the guide mechanism slides up and down, it drives the mover core to slide up and down. A linear bearing is set at the connection between the mover core 6111 and the upper fixed plate 31, the middle fixed plate 32, and the lower fixed plate 33, and the mover core passes through the linear bearing to connect with the corresponding components.

[0059] The gear set 62 includes a first gear 621 sleeved outside the rotor 612 of the magnetic screw, an intermediate gear 622 meshing with the first gear 621, and a rotating shaft connected to the intermediate gear 622 is fixed to the lower fixed plate. The one-way bearing 63 is sleeved between the rotor 612 and the first gear 621. The one-way bearing can rotate with the rotor in one direction, and can rotate freely in the other direction without transmitting torque, thereby realizing the control of unidirectional motion.

[0060] Please refer to Figure 9-13 ,in Fig. 9 yes Figure 6 A partial structural schematic diagram of the bistable mechanism shown; Fig.10 yes Fig. 9 A schematic structural diagram of a bistable fixing frame in a bistable mechanism shown; Fig.11 yes Fig. 9 A schematic diagram of the internal structure of the first magnetic rotation bistable state / the second magnetic rotation bistable state in the bistable mechanism shown; Fig.12 yes Fig.11 A schematic diagram of the structure of the bistable shaft; Fig.13 yes Fig.11 Schematic diagram of the magnetic poles of the inner and outer magnetic rings. The bistable mechanism 7 includes a bistable fixed frame 71, a first magnetic force rotating bistable 72 and a second magnetic force rotating bistable 73 arranged on the bistable fixed frame 71 and spaced apart, a bistable rotating shaft 74 rotatably connected to the first magnetic force rotating bistable 72 and the second magnetic force rotating bistable 73, and a bistable gear 75 arranged at one end of the bistable rotating shaft, and an intermediate gear 622 meshes with the bistable gear 75, and the intermediate gear 622 drives the bistable gear 75 to rotate.

[0061] The bistable fixing frame 71 is installed on the lower fixing plate 33 , and mounting plates 711 are installed on both sides of the bistable fixing frame 71 . The first magnetic rotation bistable 72 and the second magnetic rotation bistable 73 are supported on the mounting plates 711 .

[0062] The first magnetic rotation bistable 72 includes a shell 721 with a receiving space, a clamping plate 722 arranged on the side wall of the shell 721, an outer magnetic ring 723 limited by the clamping plate 722, an inner magnetic ring 724 spaced apart from the outer magnetic ring 723, and a first chuck 725 and a second chuck 726 for positioning the inner magnetic ring 724. The first chuck 725 and the second chuck 726 are connected to the bistable rotating shaft 74. When the bistable rotating shaft 74 rotates, the first chuck 725 and the second chuck 726 are driven to rotate, thereby driving the inner magnetic ring 724 to rotate, while the outer magnetic ring 723 is fixed, so that the inner magnetic ring rotates relative to the outer magnetic ring.

[0063] Specifically, the housing 721 includes an upper housing 7211 and a lower housing 7212, and the connection portion between the upper housing 7211 and the lower housing 7212 is fixedly connected to the mounting plate 711. The bistable shaft 74 is connected to the bistable fixing frame 71, the upper housing 7211, and the lower housing 7212 through angular contact bearings.

[0064] like Fig.13 As shown, the outer magnetic ring 723 and the inner magnetic ring 724 are composed of three pairs of arc-shaped permanent magnets arranged in NS, and the three pairs of arc-shaped permanent magnets are distributed in a circumference. When the bistable shaft is not subjected to external torque, the outer magnetic ring and the inner magnetic ring form NS pairs of poles, such as Fig.13 As shown in a; when the bistable shaft is subjected to external torque, the outer magnetic ring and the inner magnetic ring first form NN pole pairs, as shown in Fig.13 As shown in b, NS poles are then formed. Fig.13 As shown in c.

[0065] The first chuck 725 and the second chuck 726 are symmetrically arranged and used to limit the upper and lower sides of the inner magnetic ring. A boss 741 is arranged on the outer side of the bistable shaft 74, and the first chuck 725 and the second chuck 726 are respectively engaged with the two ends of the boss 741, so that the first chuck 725 and the second chuck 726 rotate with the bistable shaft 74.

[0066] The structure of the second magnetic rotation bistable 73 is the same as that of the first magnetic rotation bistable 72, and will not be described in detail here.

[0067] In this embodiment, the bistable shaft 74 is designed in sections, and the bistable shaft connected to the first magnetic rotation bistable 72 is connected to the bistable shaft connected to the second magnetic rotation bistable 73 through the first coupling 76, so that the bistable shaft 74 has better stability. In addition, multiple magnetic rotation bistables can be connected in series through couplings, and through modularization, they can be reasonably matched with the hydrostatic stiffness of different floats.

[0068] Please refer to Fig.14 ,yes Figure 2 The schematic diagram of the structure of the power generation mechanism in the magnetic rotation bistable and double floating wave energy converter shown. The power generation mechanism 8 includes a generator fixing frame 80 fixed to the lower fixing plate 33, a generator 81 installed on the generator fixing frame, a flywheel shaft 83 connected to the generator 81 through a second coupling 82, a flywheel 84 arranged on the flywheel shaft 83, a generator gear transmission shaft 85 connected to the flywheel shaft 83 through a coupling, and a generator gear 86 arranged on the generator gear transmission shaft. The intermediate gear 622 is meshed with the generator gear 86, and the intermediate gear 622 rotates to drive the generator gear 86 to rotate. The flywheel 84 can store mechanical energy by rotating, suppress the speed fluctuation of the generator, and make the speed of the generator more stable.

[0069] In the present invention, the first gear 621, the intermediate gear 622, the bistable gear 75, and the generator gear 86 are arranged between the upper fixing plate 31 and the intermediate fixing plate 32, and supported on the intermediate fixing plate 32, so that the operation is more stable.

[0070] Please refer to Fig.15 , is a schematic diagram of the structure of the buffer mechanism in the present invention. The buffer mechanism 9 includes a sleeve 91 and a buffer spring 92 disposed in the sleeve 91. The sleeve 91 is connected to the lower fixing plate 33 and is located below the lower fixing plate. The buffer spring 92 is in two groups, which are respectively installed at both ends of the sleeve 91, and the mover connecting plate 34 is disposed in the sleeve 91 and is located between the two groups of buffer springs. The buffer spring effectively alleviates the impact on the mover connecting plate when it moves to the extreme position, thereby avoiding component loss.

[0071] The working principle of the magnetic rotation bistable and double-floating wave energy converter of the present invention is as follows:

[0072] The wave energy converter is placed on the sea surface, the upper float 2 floats on the sea surface, and the lower float 3 sinks in the sea and is fixed, and does not fluctuate up and down with the waves. When there is wave excitation, since the lower float is fixed and does not fluctuate, the upper float floats up and down along the buoy 1 under the excitation of the wave, driving the support rod 51 to move up and down, and driving the push rod 41 to move up and down through the connecting plate 52. The push rod is rigidly connected to the mover 611 through the guide connecting plate 43, thereby driving the mover to perform reciprocating linear motion. Under the action of the magnetic coupling field, the rotor 612 is driven to rotate clockwise or counterclockwise. Among them, there are two magnetic screws 61 in the energy conversion mechanism 6, and the spiral directions are opposite to each other, and each rotor 612 is connected to the outside with a one-way bearing 63, and the one-way bearing 63 is only allowed to rotate with the rotor in one direction, and can rotate freely in the other direction without transmitting torque. The outer ring of the one-way bearing 63 is connected to a first gear 621. The first gears of the outer rings of the two one-way bearings are respectively meshed with the intermediate gear 622. Under the action of the one-way bearing, the intermediate gear always keeps rotating in a continuous counterclockwise or clockwise direction. Since the intermediate gear 622 is meshed with the bistable gear 75 and the generator gear 86, the torque is transmitted to the bistable gear 75 and the generator gear 86 through the intermediate gear 622.

[0073] The bistable shaft 74 is in an initial equilibrium position when it is not subjected to external torque ( Fig.13 a), at this time, the N pole of the outer magnetic ring is opposite to the S pole of the inner magnetic ring. When the bistable shaft is subjected to the torque transmitted by the intermediate gear, it will pass through an unbalanced position ( Fig.13 b), at this time, the N pole of the outer magnetic ring is opposite to the N pole of the inner magnetic ring, and finally reaches a new stable equilibrium position ( Fig.13 c), at this time, the N pole of the outer magnetic ring is opposite to the S pole of the inner magnetic ring, thereby producing a negative stiffness effect, which can improve the energy conversion efficiency within a certain range of motion.

[0074] The generator gear 86 transmits the torque to the generator 81, thereby realizing the rotational power generation of the generator. A flywheel 84 is added between the generator gear 86 and the generator 81, which can store mechanical energy through rotation, thereby improving the equivalent mass of the energy output mechanism, thereby suppressing the speed fluctuation of the generator and making the speed of the generator more stable.

[0075] The specific working process is as follows:

[0076] When the upper float 2 moves upward, it drives the mover 611 to move upward, wherein the first group of rotors rotates counterclockwise, and the one-way bearing in the group of magnetic lead screws rotates freely, and the second group of rotors rotates clockwise, driving the one-way bearing in the group of magnetic lead screws to lock, so that the first gear in the group rotates clockwise, thereby driving the intermediate gear 622 to rotate counterclockwise, and the intermediate gear 622 drives the generator gear 86 to rotate clockwise, so that the generator rotates clockwise to generate electricity.

[0077] When the upper float 2 moves downward, it drives the mover 611 to move downward, wherein the second set of rotors rotates counterclockwise, the one-way bearing in the magnetic screw group rotates freely, and the first set of rotors rotates clockwise, driving the one-way bearing in the magnetic screw group to lock, so that the first gear in the group rotates clockwise, thereby driving the intermediate gear 622 to rotate counterclockwise, and the intermediate gear 622 drives the generator gear 86 to rotate clockwise, so that the generator rotates clockwise again to generate electricity. Therefore, the generator in the present invention always rotates continuously in the same direction to generate electricity, thereby improving efficiency.

[0078] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations made to these embodiments without departing from the principles and spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A magnetic rotation bistable and dual-floating wave energy converter, characterized in that: It includes a buoy, an upper float sleeved outside the buoy and capable of sliding along the axial direction of the buoy, a lower float connected to the other end of the buoy, a guide mechanism arranged in the buoy and capable of moving along the axial direction of the buoy, a connecting bracket connected to the upper float and the guide mechanism, an energy conversion mechanism, a bistable mechanism and a power generation mechanism fixed in the lower float; The energy conversion mechanism includes two sets of magnetic screws, a gear set, and a one-way bearing. The magnetic screw includes a mover and a rotor. The mover is fixedly connected to the guide mechanism, and the spiral directions of the two magnetic screws are opposite. The gear set includes a first gear sleeved outside the rotor of the magnetic screw and an intermediate gear meshing with the first gear. The one-way bearing is sleeved between the rotor and the first gear. The bistable mechanism comprises a bistable fixing frame, a first magnetic rotation bistable and a second magnetic rotation bistable arranged on the bistable fixing frame and spaced apart, a bistable rotating shaft rotatably connected to the first magnetic rotation bistable and the second magnetic rotation bistable, and a bistable gear arranged at one end of the bistable rotating shaft, and the intermediate gear is meshed with the bistable gear; The power generation mechanism includes a generator, a flywheel shaft connected to the generator through a coupling, a flywheel provided on the flywheel shaft, a generator gear transmission shaft connected to the flywheel shaft, and a generator gear connected to the generator gear transmission shaft, and the intermediate gear is meshed with the generator gear; When the upper float moves upward / downward, the guide mechanism drives the mover of the energy conversion mechanism to move upward / downward, and the rotors of the two sets of magnetic screws rotate in opposite directions. Under the action of the one-way bearing, the intermediate gear performs a unidirectional rotation motion of clockwise or counterclockwise rotation, and the intermediate gear drives the bistable gear and the generator gear to rotate, and the rotation direction of the generator gear is continuously the same.

2. The magnetic rotation bistable and double-floating wave energy converter according to claim 1, characterized in that: The mover comprises a mover core, a first magnetic strip and a second magnetic strip which are attached to the outer wall of the mover core and are arranged in parallel in a spiral shape, wherein the first magnetic strip and the second magnetic strip are both radially magnetized and have opposite polarities; the mover core is connected to the guide mechanism; The rotor comprises a rotor core, a third magnetic strip and a fourth magnetic strip which are attached to the inner wall of the rotor core and are arranged in parallel in a spiral shape, wherein the third magnetic strip and the fourth magnetic strip are both radially magnetized and have opposite polarities; the rotor is sleeved outside the first magnetic strip and the second magnetic strip; The spiral directions of the magnetic strips of the two sets of magnetic screws are opposite.

3. The magnetic rotation bistable and double-floating wave energy converter according to claim 2, characterized in that: The lower float is provided with an upper fixing plate, an intermediate fixing plate, a lower fixing plate and a mover connecting plate which are parallel and spaced from top to bottom, the upper fixing plate is connected to the intermediate fixing plate by a connecting rod, and the first gear, the intermediate gear, the bistable gear and the generator gear are arranged between the upper fixing plate and the intermediate fixing plate, and supported on the intermediate fixing plate; The movers of the two groups of magnetic lead screws penetrate the upper fixed plate, the middle fixed plate and the lower fixed plate, one end of which is connected to the guide mechanism, and the other end of which is connected to the mover connecting plate.

4. The magnetic rotation bistable and double-floating wave energy converter according to claim 3 is characterized in that: It also includes a buffer mechanism arranged in the lower float, the buffer mechanism includes a sleeve and a buffer spring arranged in the sleeve, the sleeve is connected to the lower fixed plate, the buffer spring is in two groups, which are respectively installed at the two ends of the sleeve, and the mover connecting plate is arranged in the sleeve and located between the two groups of buffer springs.

5. The magnetic rotation bistable and double-floating wave energy converter according to claim 3, characterized in that: The first magnetic rotation bistable and the second magnetic rotation bistable respectively include a shell with a accommodating space, a clamping plate arranged on the side wall of the shell, an outer magnetic ring limited by the clamping plate, an inner magnetic ring spaced apart from the outer magnetic ring, and a first chuck and a second chuck for positioning the inner magnetic ring. The first chuck and the second chuck are connected to the bistable rotating shaft. When the bistable rotating shaft rotates, the first chuck and the second chuck are driven to rotate, so that the inner magnetic ring rotates relative to the outer magnetic ring.

6. The magnetic rotation bistable and double-floating wave energy converter according to claim 5, characterized in that: The inner magnetic ring and the outer magnetic ring are both composed of three pairs of arc-shaped permanent magnets arranged in NS, and the three pairs of arc-shaped permanent magnets are distributed in a circle; When the bistable shaft is not subjected to external torque, the outer magnetic ring and the inner magnetic ring form NS pole pairs; When the bistable shaft is subjected to external torque, the outer magnetic ring and the inner magnetic ring first form NN pole pairs and then form NS pole pairs.

7. The magnetic rotation bistable and double-floating wave energy converter according to claim 5, characterized in that: The first chuck and the second chuck are symmetrically distributed, a boss is arranged on the outer side of the bistable shaft, and the first chuck and the second chuck are respectively clamped with two ends of the boss.

8. The magnetic rotation bistable and double-floating wave energy converter according to claim 5, characterized in that: The bistable shaft is connected to the bistable fixing frame and the shell through angular contact bearings, and the bistable shaft is segmented. The bistable shaft connected to the first magnetic rotation bistable is connected to the bistable shaft connected to the second magnetic rotation bistable through a coupling.

9. The magnetic rotation bistable and double-floating wave energy converter according to any one of claims 1 to 8, characterized in that: The guide mechanism includes a push rod, a guide fixing plate connected to the middle of the push rod, and a guide connecting plate connected to one end of the push rod. The other end of the push rod passes through the top cover of the float and is connected to the connecting bracket. A sliding groove is provided on the inner side wall of the float. A slider that cooperates with the sliding groove is provided on the guide connecting plate. When the guide mechanism moves upward / downward, the slider slides in the sliding groove.

10. The magnetic rotation bistable and double-floating wave energy converter according to claim 9, characterized in that: The connecting bracket includes a support rod and a connecting plate, one end of the support rod is connected to the upper float, and the other end is connected to the connecting plate, the connecting plate is arranged parallel to the top cover of the buoy and the push rod is fixedly connected to the connecting plate.

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