Magnetic rotary bistable and dual float wave energy converter

Abstract

The application discloses a magnetic rotary bistable and double-floater wave energy converter, which comprises a float, an upper float sleeved outside the float and axially slidable along the float, a lower float connected with the other end of the float, a guide mechanism arranged in the float and axially movable along the float, a connecting support connected with the upper float and the guide mechanism, an energy conversion mechanism fixed in the lower float, a bistable mechanism and a power generation mechanism. When the upper float moves upward / downward, the guide mechanism drives the mover of the energy conversion mechanism to move upward / downward, the rotating directions of the rotors of the two groups of magnetic lead screws are opposite, under the action of the one-way bearing, the intermediate gear performs one-way rotation movement of clockwise or counterclockwise rotation, the intermediate gear drives the bistable gear and the generator gear to rotate, and the rotating direction of the generator gear is continuously same. The magnetic rotary bistable and double-floater wave energy converter provided by the application utilizes the non-contact magnetic coupling force between the magnetic lead screws to perform energy transmission, and ensures the reliability of the mechanism under the action of high thrust.

Description

Technical Field

[0001] This invention relates to the field of energy converter technology, specifically to a magnetically rotating bistable and dual-floating wave energy converter. Background Technology

[0002] Energy is a crucial foundation for sustaining human life and driving development. Currently, the world faces the dual challenges of traditional energy shortages and climate change. Therefore, developing and utilizing renewable energy has become an important strategy for global green and low-carbon development. Wave energy, as a green, clean, and renewable marine energy source, is gaining increasing attention due to its large reserves and high energy density. Wave energy power generation technology is currently under extensive research. The rational development and utilization of wave energy will be of great significance in alleviating the energy crisis and addressing climate change.

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

[0004] While traditional mechanical transmission energy conversion mechanisms are simple in structure, their development is limited by their short lifespan in marine environments. Furthermore, some devices may involve the discharge and treatment of liquids or gases, requiring consideration of environmental protection issues. Direct-drive energy conversion mechanisms also face technical challenges in achieving high-efficiency energy conversion under constantly changing wave conditions. Therefore, designing an efficient and reliable energy conversion mechanism to stably extract energy from waves is of great significance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a magnetically rotating bistable and dual-floating wave energy converter, which uses non-contact magnetic coupling between magnetic screws for energy transfer, ensures the reliability of the mechanism under high thrust, and introduces a magnetically rotating 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 magnetically rotating bistable and dual-floating wave energy converter includes a float, an upper float sleeved outside the float and slidable along the axial direction of the float, a lower float connected to the other end of the float, a guide mechanism disposed inside the float and movable along the axial direction of the float, 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 inside the lower float.

[0008] The energy conversion mechanism includes two sets of magnetic lead screws, a gear set, and a one-way bearing. The magnetic lead screw includes a mover and a rotor. The mover is fixedly connected to the guide mechanism, and the helical directions of the two magnetic lead screws are opposite. The gear set includes a first gear sleeved on the rotor of the magnetic lead 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 includes a bistable frame, a first magnetic rotational bistable and a second magnetic rotational bistable disposed on the bistable frame and spaced apart, a bistable rotating shaft rotatably connected to the first magnetic rotational bistable and the second magnetic rotational bistable, and a bistable gear disposed at one end of the bistable rotating shaft, wherein the intermediate gear meshes with the bistable gear;

[0010] The power generation mechanism includes a generator, a flywheel shaft connected to the generator via a coupling, a flywheel disposed on the flywheel shaft, a generator gear drive shaft connected to the flywheel shaft, and a generator gear connected to the generator gear drive shaft, wherein the intermediate gear meshes with the generator gear;

[0011] When the upper float moves up / down, the guide mechanism drives the mover of the energy conversion mechanism to move up / down. 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 rotational motion of clockwise or counterclockwise. 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 includes a mover core, a first magnetic strip and a second magnetic strip arranged in a spiral parallel to each other and attached to the outer wall of the mover core, 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;

[0013] The rotor includes a rotor core, a third magnetic strip and a fourth magnetic strip arranged in a spiral parallel to each other and attached to the inner wall of the rotor core, the third magnetic strip and the fourth magnetic strip are radially magnetized and have opposite polarities; the rotor is sleeved outside the first magnetic strip and the second magnetic strip.

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

[0015] Furthermore, the lower float is provided with parallel and spaced upper fixing plate, middle fixing plate, lower fixing plate and mover connecting plate arranged in sequence from top to bottom. The upper fixing plate and the middle fixing plate are connected by a connecting rod. The first gear, the middle gear, the bistable gear and the generator gear are located between the upper fixing plate and the middle fixing plate and are supported on the middle fixing plate.

[0016] The moving parts of the two sets of magnetic screws pass through the upper fixed plate, the middle fixed plate and the lower fixed plate, with one end connected to the guide mechanism and the other end connected to the moving part connecting plate.

[0017] Furthermore, it also includes a buffer mechanism disposed within the lower float. The buffer mechanism includes a sleeve and a buffer spring disposed within the sleeve. The sleeve is connected to the lower fixed plate. There are two sets of buffer springs, which are respectively installed at both ends of the sleeve. The moving part connecting plate is disposed within the sleeve and located between the two sets of buffer springs.

[0018] Furthermore, the first magnetic rotational bistable and the second magnetic rotational bistable respectively include a housing with a receiving space, a clamping plate disposed on the side wall of the housing, 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, it drives the first chuck and the second chuck to rotate, causing the inner magnetic ring to rotate relative to the outer magnetic ring.

[0019] Furthermore, both the inner and outer magnetic rings are composed of three pairs of arc-shaped permanent magnets arranged in an N-S pattern, and the three pairs of arc-shaped permanent magnets are distributed in a circular pattern.

[0020] When the bistable shaft is not subjected to external torque, the outer magnetic ring and the inner magnetic ring form an N-S pole pair;

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

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

[0023] Furthermore, the bistable rotating shaft is connected to the bistable fixing frame and the housing via angular contact bearings, and the bistable rotating shaft is segmented, with the bistable rotating shaft connecting the first magnetic rotation bistable and the bistable rotating shaft connecting the second magnetic rotation bistable connected via couplings.

[0024] Furthermore, the guiding 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, and a slider that cooperates with the sliding groove is provided on the guide connecting plate. When the guiding mechanism moves up / down, 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 float, and the push rod is fixedly connected to the connecting plate.

[0026] Compared with the prior art, the magnetic rotational bistable and dual-floating wave energy converter provided by the present invention has the following advantages:

[0027] I. The magnetic rotary bistable and dual-buoy wave energy converter provided by this invention utilizes the non-contact magnetic coupling force between magnetic lead screws for energy transfer, ensuring the reliability of the mechanism while achieving high thrust. The linear motion of the float is converted into rotational motion through two magnetic lead screws. The combination of a one-way bearing and a gear forms a one-way gear mechanism, which transforms bidirectional rotational motion into unidirectional rotational motion, thereby ensuring that the rotation direction of the generator gears is continuously the same, improving the efficiency of energy conversion and the stability of power generation.

[0028] II. The magnetic rotating bistable and dual-floating wave energy converter provided by the present invention introduces a magnetic rotating bistable mechanism, which generates a negative stiffness effect during operation, and can improve energy conversion efficiency within a certain range of motion, effectively improving the problem of low conversion efficiency of the device at low frequencies. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the magnetic rotational bistable and dual-floating wave energy converter provided by the present invention;

[0031] Figure 2 yes Figure 1 The diagram shows a partial structural schematic of a magnetically rotating bistable and dual-floating wave energy converter.

[0032] Figure 3 yes Figure 1 The diagram shows the internal structure of the lower float in the magnetically rotating bistable and dual-buoy wave energy converter.

[0033] Figure 4 yes Figure 3 The diagram shows a partial structural schematic of the lower float.

[0034] Figure 5 yes Figure 2The diagram shows the connection between the guide mechanism and other components in the magnetic rotary bistable and dual-floating wave energy converter.

[0035] Figure 6 yes Figure 2 The diagram shows the positional relationship between the energy conversion mechanism, the bistable mechanism, and the power generation mechanism in the magnetic rotary bistable and dual-floating wave energy converter.

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

[0037] Figure 8 yes Figure 6 Partial structural diagram;

[0038] Figure 9 yes Figure 6 The diagram shows a partial structural schematic of the bistable mechanism.

[0039] Figure 10 yes Figure 9 The diagram shows the structure of the bistable fixing frame in the bistable mechanism.

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

[0041] Figure 12 yes Figure 11 Schematic diagram of the structure of the bistable rotating shaft;

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

[0043] Figure 14 yes Figure 2 The diagram shows the structure of the power generation mechanism in the magnetically rotating bistable and dual-floating wave energy converter.

[0044] Figure 15 This is a schematic diagram of the buffer mechanism in this invention. Detailed Implementation

[0045] 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 objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0046] It should be noted that the descriptions of these embodiments are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Please refer to the following: Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the structure of the magnetic rotational bistable and dual-floating body wave energy converter provided by the present invention. Figure 2 yes Figure 1 The schematic diagram shown is a partial structural diagram of the magnetic rotating bistable and dual-floating wave energy converter of the present invention. The magnetic rotating bistable and dual-floating wave energy converter of the present invention includes a float 1, an upper float 2 sleeved outside the float 1, a lower float 3 connected to the other end of the float 1, a guide mechanism 4 disposed inside the float 1, a connecting bracket 5 connected to the upper float 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 inside the lower float 3.

[0048] The float 1 is a cylindrical tube with a top cover 11 at its top and its bottom end connected to the lower float 3, communicating with the interior of the lower float. Specifically, the bottom end of the float has a connecting platform that is rigidly connected to the lower float 3, and after the connection, the float and the interior of the lower float communicate to form a closed space.

[0049] The upper float 2 is slidably connected to the buoy 1, and under the excitation of sea waves, the upper float 2 slides up and down along the axial direction of the buoy. The upper float 2 is shaped like an inverted frustum, and its structure meets the requirements of marine mechanics engineering.

[0050] Please combine Figure 3 and Figure 4 ,in Figure 3 yes Figure 1 The diagram shows the internal structure of the lower float in the magnetically rotating bistable and dual-buoy wave energy converter. Figure 4 yes Figure 3The diagram shows a partial structural schematic of the lower float. A fixing plate is installed inside the lower float 3 to mount 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 fixing plate 31, a middle fixing plate 32, a lower fixing plate 33, and a mover connecting plate 34, arranged sequentially from top to bottom and spaced parallel to each other. During installation, a support block 35 is installed on the inner wall of the lower float corresponding to the lower fixing plate position. The lower fixing plate 33 is supported on the support block 35 and fixedly connected by bolts. The middle fixing plate 32 is connected to the upper fixing plate 31 by connecting protrusions 36 fixed to the inner wall of the lower float. Multiple connecting posts 321 are provided around the middle fixing plate 32, and the connecting posts 321 are fixedly connected to the connecting protrusions 36 by bolts. Because the gap between the upper fixing plate 31 and the middle fixing plate 32 is small, the connecting protrusions 36 can be used as support members for the upper fixing plate 31. To maintain the stability of the upper fixing plate 31, the upper fixing plate 31 and the middle fixing plate 32 are connected by connecting rods 37.

[0051] Please see Figure 5 ,yes Figure 2 The diagram shows the connection between the guiding mechanism and other components in the magnetic rotary bistable and dual-buoy wave energy converter. The guiding 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 float 1 are parallel. The other end of the push rod 41 passes through the top cover 11 of the float and connects to the connecting bracket 5. A groove 12 is provided on the inner wall of the float 1. A slider 44 that cooperates with the groove is provided on the guide connecting plate 43. When the guiding mechanism 4 moves up / down, the slider 44 slides in the groove 12. To maintain the smooth operation of the guiding mechanism 4 in the float, preferably, at least two grooves are provided on the inner wall of the float, and the two grooves are symmetrically distributed. Correspondingly, two sliders are symmetrically distributed on the guide connecting plate 43. In addition, the number of groove / slider groups can be three or four.

[0052] Specifically, there are two push rods 41, each with threads at both ends, which are fixedly connected to the guide connecting plate 43 by threaded nuts. Through holes corresponding to the number of push rods are opened on the guide fixing plate 42 and the top cover 11 of the float. Linear bearings are installed at the corresponding positions of these through holes, and the push rods 41 pass through the linear bearings. The linear bearings provide stable guidance, ensuring that the push rods maintain linear motion during operation and preventing deviation that could affect subsequent energy transfer.

[0053] The connecting bracket 5 includes a support rod 51 and a connecting plate 52. The connecting plate 52 is arranged parallel to and spaced apart from the top cover 11 of the float 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 float and is connected to the connecting plate 52. The connection method can be bolt / nut engagement.

[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 facilitates the assembly and disassembly of the structure. Alternatively, it can be fixed by welding or other methods.

[0055] Please refer to the following: Figures 6-8 ,in Figure 6 yes Figure 2 The diagram shows the positional relationship between the energy conversion mechanism, the bistable mechanism, and the power generation mechanism in the magnetic rotary bistable and dual-floating wave energy converter. Figure 7 yes Figure 6 A schematic diagram of the magnetic lead screw in the energy conversion mechanism shown; Figure 8 yes Figure 6 A partial structural diagram is shown. The energy conversion mechanism 6 includes two sets of magnetic lead screws 61, a gear set 62, and a one-way bearing 63.

[0056] The magnetic lead screw 61 includes a mover 611 and a rotor 612. The mover 611 includes a mover core 6111, a first magnetic strip 6112 and a second magnetic strip 6113 arranged in a spiral pattern and attached to the outer wall of the mover core. Both the first magnetic strip 6112 and the second magnetic strip 6113 are radially magnetized and have opposite polarities. The first magnetic strip 6112 and the second magnetic strip 6113 are located in the middle section of the mover core, and their length is determined according to the range of the movement trajectory of the mover core with the guide mechanism during operation.

[0057] The rotor 612 is mounted on the mover 611 and includes a rotor core 6121, a third magnetic strip 6122 and a fourth magnetic strip 6123 arranged in a spiral pattern and attached to the inner wall of the rotor core 6121. Both the third magnetic strip 6122 and the fourth magnetic strip 6123 are radially magnetized and have opposite polarities. The third and fourth magnetic strips are spaced apart from the first and second magnetic strips. The spiral directions of the magnetic strips in the two sets of magnetic screws are opposite.

[0058] The moving cores 6111 of the two sets of magnetic lead screws 61 pass through 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 moving core connecting plate 34. The connection method can be a bolt / nut connection. When the guide mechanism slides up and down, it drives the moving cores to slide up and down. Linear bearings are provided at the connection points of the moving cores 6111 with the upper fixed plate 31, the middle fixed plate 32, and the lower fixed plate 33. The moving cores pass through the linear bearings and connect to the corresponding components.

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

[0060] Please refer to the following: Figures 9-13 ,in Figure 9 yes Figure 6 The diagram shows a partial structural schematic of the bistable mechanism. Figure 10 yes Figure 9 The diagram shows the structure of the bistable fixing frame in the bistable mechanism. Figure 11 yes Figure 9 A schematic diagram of the internal structure of the first magnetic rotational bistable state / second magnetic rotational bistable state in the bistable mechanism shown; Figure 12 yes Figure 11 Schematic diagram of the structure of the bistable rotating shaft; Figure 13 yes Figure 11 A schematic diagram of the magnetic poles of the outer and inner magnetic rings. The bistable mechanism 7 includes a bistable frame 71, a first magnetic rotational bistable 72 and a second magnetic rotational bistable 73 disposed on the bistable frame 71 and spaced apart, a bistable rotating shaft 74 rotatably connected to the first magnetic rotational bistable 72 and the second magnetic rotational bistable 73, and a bistable gear 75 disposed at one end of the bistable rotating shaft. 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 mounting bracket 71 is mounted on the lower mounting plate 33, and mounting plates 711 are mounted on both sides of it. The first magnetic rotation bistable 72 and the second magnetic rotation bistable 73 are supported on the mounting plates 711.

[0062] The first magnetic rotational bistable 72 includes a housing 721 with a receiving space, a clamping plate 722 disposed on the side wall of the housing 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, it drives the first chuck 725 and the second chuck 726 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, housing 721 includes an upper housing 7211 and a lower housing 7212, and the connecting part between the upper housing 7211 and the lower housing 7212 is fixedly connected to the mounting plate 711. The bistable rotating shaft 74 is connected to the bistable fixing frame 71, as well as the upper housing 7211 and the lower housing 7212, via angular contact bearings.

[0064] like Figure 13 As shown, both the outer magnetic ring 723 and the inner magnetic ring 724 are composed of three pairs of arc-shaped permanent magnets arranged in a circumferential pattern. When the bistable shaft is not subjected to external torque, the outer magnetic ring and the inner magnetic ring form an NS pole pair, as shown. Figure 13 As shown in diagram a; when the bistable shaft is subjected to external torque, the outer magnetic ring and the inner magnetic ring first form an N-N pole pair, as shown in diagram a. Figure 13 As shown in b, then the N and S pole pairs are formed, as follows. Figure 13 As shown in c.

[0065] The first chuck 725 and the second chuck 726 are symmetrically distributed and used to limit the upper and lower sides of the inner magnetic ring. A boss 741 is provided on the outer side of the bistable rotating shaft 74. 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 rotating shaft 74.

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

[0067] In this embodiment, the bistable rotating shaft 74 is designed in segments. The bistable rotating shaft connecting the first magnetic rotating bistable 72 and the bistable rotating shaft connecting the second magnetic rotating bistable 73 are connected by a first coupling 76, which improves the stability of the bistable rotating shaft 74. In addition, multiple magnetic rotating bistables can be connected in series by couplings, and through modularization, they can be reasonably matched with the hydrostatic stiffness of different floats.

[0068] Please refer to the following: Figure 14 ,yes Figure 2 The diagram shows the structural schematic of the power generation mechanism in a magnetic rotary bistable and dual-floating wave energy converter. The power generation mechanism 8 includes a generator mounting frame 80 fixed to a lower mounting plate 33, a generator 81 mounted on the generator mounting frame, a flywheel shaft 83 connected to the generator 81 via a second coupling 82, a flywheel 84 mounted on the flywheel shaft 83, a generator gear drive shaft 85 connected to the flywheel shaft 83 via a coupling, and a generator gear 86 mounted on the generator gear drive shaft. An intermediate gear 622 meshes with the generator gear 86; rotation of the intermediate gear 622 drives the generator gear 86 to rotate. The flywheel 84 can store mechanical energy through rotation, suppressing generator speed fluctuations and making the generator speed more stable.

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

[0070] Please refer to the following: Figure 15 This is a schematic diagram of the buffer mechanism in this invention. The buffer mechanism 9 includes a sleeve 91 and buffer springs 92 disposed within the sleeve 91. The sleeve 91 is connected to the lower fixed plate 33 and is located below the lower fixed plate. There are two sets of buffer springs 92, which are respectively installed at both ends of the sleeve 91. The moving part connecting plate 34 is disposed within the sleeve 91 and located between the two sets of buffer springs. The buffer springs effectively mitigate the impact on the moving part connecting plate when it moves to its limit position, thus preventing component damage.

[0071] The working principle of the magnetically rotating bistable and dual-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 surface, while the lower float 3 is submerged and fixed, not fluctuating with the waves. When waves excite the system, because 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 waves, causing the support rod 51 to move up and down. This movement is then caused by the connecting plate 52, which in turn causes the push rod 41 to move up and down. The push rod is rigidly connected to the mover 611 through the guide connecting plate 43, thus causing 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. The energy conversion mechanism 6 has two magnetic screws 61 with opposite helical directions. Each rotor 612 is externally connected to a one-way bearing 63. The one-way bearing 63 is only allowed to rotate with the rotor in one direction, while it 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 on the outer rings of the two one-way bearings mesh with the intermediate gear 622 respectively. Under the action of the one-way bearings, the intermediate gear always maintains continuous counterclockwise or clockwise rotation. Since the intermediate gear 622 meshes with the bistable gear 75 and the generator gear 86, the torque is transmitted to the bistable gear 75 and the generator gear 86 respectively through the intermediate gear 622.

[0073] The bistable shaft 74 is in its initial equilibrium position when it is not subjected to external torque. Figure 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. Figure 13 (b) At this point, the N pole of the outer magnetic ring is opposite to the N pole of the inner magnetic ring, eventually reaching a new stable equilibrium position. Figure 13 c) At this time, the N pole of the outer magnetic ring is opposite to the S pole of the inner magnetic ring, thus producing a negative stiffness effect, which can improve the energy conversion efficiency within a certain range of motion.

[0074] The generator gear 86 transmits torque to the generator 81, thereby enabling the generator to generate electricity by rotation. A flywheel 84 is added between the generator gear 86 and the generator 81, which can store mechanical energy by rotation, improving the equivalent quality 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 work process is as follows:

[0076] When the upper float 2 moves upward, it drives the mover 611 to move upward. The first set of rotors rotates counterclockwise, and the one-way bearing in the magnetic screw of this set rotates freely. The second set of rotors rotates clockwise, which locks the one-way bearing in the magnetic screw of this set, causing the first gear in this set to rotate clockwise. This, in turn, drives the intermediate gear 622 to rotate counterclockwise. The intermediate gear 622 drives the generator gear 86 to rotate clockwise, causing the generator to rotate clockwise and generate electricity.

[0077] When the upper float 2 moves downward, it drives the mover 611 downward. The second set of rotors rotates counterclockwise, and the one-way bearing in the magnetic screw rotates freely. The first set of rotors rotates clockwise, locking the one-way bearing in the magnetic screw, causing the first gear in that set to rotate clockwise. This, in turn, drives the intermediate gear 622 to rotate counterclockwise. The intermediate gear 622 then drives the generator gear 86 to rotate clockwise, causing the generator to rotate clockwise again to generate electricity. Therefore, in this invention, the generator continuously rotates in the same direction to generate electricity, improving efficiency.

[0078] The embodiments of the present invention have been 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 still fall within the protection scope of the present invention.

Claims

1. A magnetically rotating bistable and dual-floating wave energy converter, characterized in that, It includes a buoy, an upper float sleeved outside the buoy and slidable along the axial direction of the buoy, a lower float connected to the other end of the buoy, a guide mechanism disposed inside the buoy and movable 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 inside the lower float. The energy conversion mechanism includes two sets of magnetic lead screws, a gear set, and a one-way bearing. The magnetic lead screw includes a mover and a rotor. The mover is fixedly connected to the guide mechanism, and the helical directions of the two magnetic lead screws are opposite. The gear set includes a first gear sleeved on the rotor of the magnetic lead 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 includes a bistable frame, a first magnetic rotational bistable and a second magnetic rotational bistable disposed on the bistable frame and spaced apart, a bistable rotating shaft rotatably connected to the first magnetic rotational bistable and the second magnetic rotational bistable, and a bistable gear disposed at one end of the bistable rotating shaft, wherein the intermediate gear meshes with the bistable gear; The power generation mechanism includes a generator, a flywheel shaft connected to the generator via a coupling, a flywheel disposed on the flywheel shaft, a generator gear drive shaft connected to the flywheel shaft, and a generator gear connected to the generator gear drive shaft, wherein the intermediate gear meshes with the generator gear; When the upper float moves up / down, the guide mechanism drives the mover of the energy conversion mechanism to move up / down. 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 one-way rotational motion of clockwise or counterclockwise. 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. The lower float is provided with an upper fixed plate, a middle fixed plate, a lower fixed plate and a moving part connecting plate arranged in parallel and spaced intervals from top to bottom. The upper fixed plate and the middle fixed plate are connected by a connecting rod. The first gear, the middle gear, the bistable gear and the generator gear are located between the upper fixed plate and the middle fixed plate and are supported on the middle fixed plate. The moving parts of the two sets of magnetic screws pass through the upper fixed plate, the middle fixed plate and the lower fixed plate, with one end connected to the guide mechanism and the other end connected to the moving part connecting plate; It also includes a buffer mechanism disposed within the lower float, the buffer mechanism comprising a sleeve and a buffer spring disposed within the sleeve, the sleeve being connected to the lower fixed plate, the buffer spring comprising two sets, respectively installed at both ends of the sleeve, and the moving part connecting plate disposed within the sleeve and located between the two sets of buffer springs; The first and second magnetic rotational bistable systems each include a housing with a receiving space, a clamping plate disposed on the side wall of the housing, 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, it drives the first chuck and the second chuck to rotate, causing the inner magnetic ring to rotate relative to the outer magnetic ring. Both the inner and outer magnetic rings are composed of three pairs of arc-shaped permanent magnets arranged in a NS pattern, and the three pairs of arc-shaped permanent magnets are distributed in a circular pattern. When the bistable shaft is not subjected to external torque, the outer magnetic ring and the inner magnetic ring form an N-S pole pair; When the bistable shaft is subjected to external torque, the outer magnetic ring and the inner magnetic ring first form the NN pole pair, and then form the NS pole pair; The first chuck and the second chuck are symmetrically distributed, and a boss is provided on the outer side of the bistable rotating shaft. The first chuck and the second chuck are respectively engaged with the two ends of the boss. The guiding 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 guiding mechanism moves up / down, the slider slides in the sliding groove.

2. The magnetically rotating bistable and dual-floating wave energy converter according to claim 1, characterized in that, The mover includes a mover core, a first magnetic strip and a second magnetic strip arranged in a spiral parallel to each other and attached to the outer wall of the mover core. 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 includes a rotor core, a third magnetic strip and a fourth magnetic strip arranged in a spiral parallel to each other and attached to the inner wall of the rotor core, the third magnetic strip and the fourth magnetic strip are radially magnetized and have opposite polarities; the rotor is sleeved outside the first magnetic strip and the second magnetic strip. The magnetic strips of the two sets of magnetic screws have opposite spiral directions.

3. The magnetically rotating bistable and dual-floating wave energy converter according to claim 1, characterized in that, The bistable rotating shaft is connected to the bistable fixing frame and the housing via angular contact bearings. The bistable rotating shaft is segmented, and the bistable rotating shaft connecting the first magnetic rotation bistable is connected to the bistable rotating shaft connecting the second magnetic rotation bistable via couplings.

4. The magnetically rotating bistable and dual-floating wave energy converter according to claim 1, 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 and spaced apart from the top cover of the float, and the push rod is fixedly connected to the connecting plate.

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