A rotary magnetic bistable mechanism for wave energy power generation

Abstract

The application discloses a rotary magnetic force bistable mechanism for a wave energy power generation device, comprising a deceleration component and a magnetic force bistable module; the output end of the deceleration component is connected with the input end of the magnetic force bistable module, and the magnetic force bistable module provides a bistable restoring force to the deceleration component. The application is in the form of rotation, has simple and reliable structure, small and compact size, is convenient to arrange and install, is beneficial to modular expansion, can generate rated stiffness, and improves the engineering applicability of the bistable mechanism. In addition, the application has higher magnet type reliability, does not have contact force, and has small mechanical loss. The application fully utilizes the negative stiffness and stiffness nonlinear characteristics of the bistable mechanism, improves the energy trapping efficiency, expands the energy trapping bandwidth, adapts to actual sea conditions, reduces construction and operation cost, and improves the economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wave energy generation device, and particularly relates to a rotary magnetic bistable mechanism for a wave energy generation device. BACKGROUND

[0002] In the principle of wave energy generation device, the floater type device has the characteristics of high energy capture efficiency, small unit power volume and low cost. The floater type device uses its resonance characteristics to make the floater and the wave resonate to efficiently capture energy. However, the floater type device has the problem of narrow energy capture bandwidth, that is, poor energy capture at non-resonant frequencies. Meanwhile, the actual sea state is multi-frequency, time-varying and random, and the wave energy device is difficult to effectively capture the energy of each frequency component, resulting in low efficiency. In order to break through this technical bottleneck, non-linear energy capture mechanisms are often used, including active control and bistable mechanism. Active control has the problems of prediction error, long time consumption, lack of robustness for external disturbance and excitation prediction. In addition, the prediction sensor has low reliability, high maintenance cost, and needs additional power, which reduces the economy and is difficult to be applied in engineering. On the other hand, the bistable mechanism uses its negative stiffness characteristics to improve the energy capture efficiency of the device. At the same time, the bistable mechanism reduces the waterline area of the device and the cost while maintaining the resonant frequency of the device. The bistable mechanism also uses the non-linear characteristics of the stiffness to increase the energy capture bandwidth to better adapt to the actual sea state.

[0003] Currently, the bistable mechanism has the following technical problems: The bistable mechanism applied to the wave energy generation device has three types of springs, air cylinders and magnets. The spring bistable mechanism has the problems of mechanical performance loss, friction loss and fatigue fracture. The air cylinder bistable mechanism is prone to delay, blind area and hysteresis effect. Compared with the above two types of bistable mechanisms, the magnet type has higher reliability and no contact force, and has small mechanical loss. However, the current magnet bistable mechanism is mostly in the translational mode, has a large structure, is not conducive to modular expansion, and has certain application limitations.

[0004] Therefore, the technical personnel in the art are committed to developing a rotary magnetic bistable mechanism for a wave energy generation device to solve the above problems. SUMMARY

[0005] In view of the above defects of the prior art, the technical problem to be solved by the present application is the application limitation of the magnet bistable mechanism with a large structure and not conducive to modular expansion.

[0006] To achieve the above object, the present application provides a rotary magnetic bistable mechanism for a wave energy generation device, characterized in that it comprises a speed reduction component and a magnetic bistable module; the output end of the speed reduction component is connected with the input end of the magnetic bistable module, and the magnetic bistable module provides a bistable restoring force to the speed reduction component.

[0007] Further, the deceleration component comprises an input shaft and a standard gear deceleration box; the input shaft is connected with the input end of the standard gear deceleration box.

[0008] Further, the magnetic bistable module comprises a module shell, a rotating shaft, a bearing, a rotating magnet, a fixed magnet and a transmission gear; one end of the rotating shaft is connected with the output end of the deceleration component, and the other end extends into the magnetic bistable module.

[0009] Further, the rotating magnet is a cylinder with NS poles on the left and right sides; the rotating shaft passes through the center of the rotating magnet and is fixedly connected with the rotating magnet; the rotating magnet is sleeved with the fixed magnet in the radial direction.

[0010] Further, the fixed magnet is a cube with NS poles on the left and right sides, and the upper and lower faces are penetrated; the fixed magnet is fixedly connected with the module shell around the fixed magnet, and the middle penetrating part can be inserted into the rotating magnet; a gap is left between the fixed magnet and the rotating magnet.

[0011] Further, the fixed magnet is fixedly connected with the module shell around the fixed magnet by using bolts.

[0012] Further, the rotating shaft extends out from the bottom of the module shell, and the extended section is fixedly connected with the transmission gear.

[0013] Further, the transmission gears at the bottoms of the magnetic bistable modules are meshed with each other to conduct the restoring force.

[0014] Further, the number of the magnetic bistable modules is three.

[0015] Further, the magnetic bistable modules are connected by bolts.

[0016] Compared with the conventional method and device, the present application has the following beneficial effects:

[0017] The rotating magnet and the fixed magnet in the magnetic bistable module are attracted to each other by opposite poles and repel each other by the same poles under the magnetic action, so that the rotating magnet and the fixed magnet are stably in the equilibrium state of opposite poles. The position is the potential well of the restoring force potential, and the restoring force potential is the smallest. When the input shaft rotates, the rotating magnet and the fixed magnet will pass through the unstable equilibrium state of the same poles. The rotating magnet will pass through the stable equilibrium position again when it continues to rotate. When the rotating magnet takes the unstable equilibrium state as the origin and rotates forward and backward for one cycle, it will pass through the stable equilibrium position once, thereby realizing the bistable mechanism.

[0018] The application is a rotating form, simple and reliable in structure, small and compact in size, convenient to arrange and install, beneficial to modular expansion to generate rated stiffness, and improves the engineering applicability of the bistable mechanism. In addition, the application is of higher reliability of the magnet type, and there is no contact force, and the mechanical loss is small. The application fully utilizes the negative stiffness and non-linear stiffness characteristics of the bistable mechanism, improves the energy capture efficiency, expands the energy capture bandwidth, adapts to actual sea conditions, reduces the construction and operation cost, and improves the economy.

[0019] The concept, specific structure and technical effects of the application will be further described below in combination with the drawings, so as to fully understand the purpose, features and effects of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the application.

[0021] Figure 2 It is a schematic diagram of the longitudinal section structure of a preferred embodiment of the application.

[0022] Figure 3 It is a schematic diagram of the transverse section of the magnet in the stable equilibrium state of a preferred embodiment of the application.

[0023] Figure 4 It is a schematic diagram of the transverse section of the magnet in the unstable equilibrium state of a preferred embodiment of the application.

[0024] Figure 5 It is a schematic diagram of the overall structure of the energy conversion device of a preferred embodiment of the application.

[0025] Among them, 1-input shaft, 2-standard gear reduction box, 3-rotating shaft, 4-bearing, 5-rotating magnet, 6-fixed magnet, 7-transmission gear, 8-module shell, 9-push rod, 10-nut, 11-roller screw, 12-synchronous wheel, 13-synchronous belt, 14-coupling, 15-reverse transmission mechanism, 16-generator. DETAILED DESCRIPTION

[0026] The following reference drawings introduce several preferred embodiments of the application, so that the technical content is clearer and easier to understand. The application can be embodied in many different forms of embodiments, and the protection scope of the application is not limited to the embodiments mentioned in the text.

[0027] In the drawings, the same numbers are used to represent the same components throughout the drawings, and components with similar structures or functions are represented by similar numbers. The size and thickness of each component shown in the drawings are arbitrarily shown, and the size and thickness of each component are not limited by the application. In order to make the drawing clearer, the thickness of some components is appropriately exaggerated in some places in the drawing.

[0028] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0029] In the description of the present application, it should be noted that the terms "middle", "upper", "lower", "left", "right", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] As shown in Figure 1 , Figure 2 , a rotary magnetic bistable mechanism for a wave power generation device of the present application is composed of a deceleration component and a magnetic bistable module; the deceleration component includes an input shaft 1 and a standard gear reduction box 2; wherein the input shaft 1 is connected with the input end of the standard gear reduction box 2; the magnetic bistable module includes a module housing 8, a rotating shaft 3, a bearing 4, a rotating magnet 5, a fixed magnet 6 and a transmission gear 7; one end of the rotating shaft 3 is connected with the output end of the standard gear reduction box 2, and the other end extends into the magnetic bistable module.

[0032] In an optional embodiment, the rotating magnet 5 is a cylinder, with NS poles on the left and right, and the rotating shaft 3 is fixedly connected in the middle of the magnet; the rotating magnet 5 is radially sleeved with the fixed magnet 6.

[0033] In an optional embodiment, the fixed magnet 6 is a cube with through holes on the upper and lower surfaces, with NS poles on the left and right; the fixed magnet 6 is fixedly connected with the module housing 8 around, and the middle through hole part can be inserted into the rotating magnet 5 with a gap.

[0034] In an optional embodiment, the rotating shaft 3 extends out from the bottom of the module housing 8, and the extended section is fixedly connected with the transmission gear 7.

[0035] In an optional embodiment, a plurality of magnetic bistable modules are bolted laterally, and the transmission gears 7 at the bottom of each module are engaged with each other to transmit the restoring force.

[0036] The working principle of the present invention is that the rotating magnet 5 and the fixed magnet 6 in the rotary magnetic bistable module attract each other with different poles and repel each other with the same poles under the magnetic effect, so that the rotating magnet 5 and the fixed magnet 6 are stable in a balanced state of attraction between different poles, such as Figure 3 As shown. This position is the potential well of the restoring force potential, and the restoring force potential is the smallest. When the input shaft 1 rotates, the rotating magnet 5 and the fixed magnet 6 will pass through an unstable equilibrium state with the same poles facing each other, as shown Figure 4 As shown, if the rotating magnet 5 continues to rotate, it will pass through the stable equilibrium position again. When the rotating magnet 5 rotates forward and backward with the unstable equilibrium state as the origin, it will pass through the stable equilibrium position once. Thus, a bistable mechanism is realized.

[0037] In an optional embodiment, the rotary magnetic bistable mechanism is fixed in the energy conversion device, such as Figure 5 As shown. The energy conversion device is a mechanical transmission component, and the push rod 9 is driven up and down by the floating body vibrating with the waves. The push rod 9 is fixed to the screw nut 10. The up and down reciprocating motion of the nut 10 drives the ball screw 11 to rotate back and forth. The ball screw 11 converts the reciprocating rotation into unidirectional rotation through the coupling 14 and the direction-changing transmission mechanism 15, and transmits it to the generator 16 at the bottom of the energy conversion device to generate electricity. In addition, the ball screw 11 and the input shaft 1 of the rotating magnetic bistable mechanism are both equipped with a synchronous wheel 12, and the synchronous wheel 12 transmits the reciprocating rotation through the synchronous belt 13. When the floating body swings vertically in the waves, the up and down reciprocating motion of the push rod 9 is converted into reciprocating rotation through the ball screw 11. After the power transmission through the synchronous belt 13 and the synchronous wheel 12, the rotating magnet 5 in the rotating magnetic bistable mechanism also begins to rotate back and forth. The bistable restoring torque exerted on the magnet during its rotation is then reversely transmitted to the push rod 9 and the floating body through the above structure, thereby providing a bistable restoring force for the wave energy device.

[0038] The present invention is not limited to the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention shall be equivalent replacement methods, including but not limited to changes in names, changes in part models and sizes, adjustments to the installation position or installation angle of the mechanism, overall or partial enlargement or reduction, and adjustments to the relative positions of parts, shall all be included in the scope of protection of the present invention.

[0039] The preferred embodiments of the present application have been described above in detail. It should be understood that modifications and variations to the preferred embodiments could be made by those skilled in the art in light of the teachings above. It is therefore contemplated that the application can encompass other variations and modifications that fall within the scope of the claims.

Claims

1. A rotary magnetic bistable mechanism for a wave energy power plant, characterized in that, The application relates to a magnetic force double-stable module and a speed reduction component, wherein the output end of the speed reduction component is connected with the input end of the magnetic force double-stable module, the magnetic force double-stable module provides double-stable restoring force to the speed reduction component, the magnetic force double-stable module comprises a module shell, a rotating shaft, a bearing, a rotating magnet, a fixed magnet and a transmission gear, one end of the rotating shaft is connected with the output end of the speed reduction component, the other end of the rotating shaft extends into the magnetic force double-stable module, the rotating magnet is a cylinder with NS poles on the left and right sides, the rotating shaft passes through the center of the rotating magnet and is fixedly connected with the rotating magnet, the fixed magnet is a cuboid with through upper and lower surfaces and with NS poles on the left and right sides, the fixed magnet is fixedly connected with the module shell around the fixed magnet, the middle through part of the fixed magnet can be inserted into the rotating magnet, and a gap is left between the fixed magnet and the rotating magnet.

2. The rotary magnetic bistable mechanism for wave power plants according to claim 1, characterized in that, The speed reduction component comprises an input shaft and a standard gear reduction box, and the input shaft is connected with the input end of the standard gear reduction box.

3. The rotary magnetic bistable mechanism for wave power plants according to claim 1, characterized in that, The fixed magnet is fixedly connected with the module shell around the fixed magnet through bolts.

4. The rotary magnetic bistable mechanism for wave power plants according to claim 1, characterized in that, The rotating shaft extends from the bottom of the module shell, and the extending section is fixedly connected with the transmission gear.

5. The rotating magnetic bistable mechanism for wave power plants according to claim 4, characterized in that, A plurality of the magnetic force double-stable modules are transversely connected, the transmission gears of the bottoms of the magnetic force double-stable modules are meshed with each other, and restoring force is conducted.

6. The rotating magnetic bistable mechanism for wave power plants according to claim 5, characterized in that, The number of the magnetic force double-stable modules is three.

7. The rotating magnetic bistable mechanism for wave power plants according to claim 5, characterized in that, The plurality of the magnetic force double-stable modules are connected through bolts.

Images