Raft type wave power generation device and system

Abstract

The invention discloses a raft type wave power generation device and system. The raft type wave power generation device comprises two adjacent buoyancy tanks. A generator, a first driving assembly and a second driving assembly are arranged in the buoyancy tank; each of the first driving assembly and the second driving assembly comprises a rack, a gear and a pawl; the rack is in meshed connection with the gear, and the pawl is in meshed connection with the gear and connected with an input shaft of the generator; the rack is in sliding connection with the floating box, and the rack is hinged to the third driving assembly; the third driving assembly is hinged to the adjacent buoyancy tank, the third driving assembly can drive the racks in the first driving assembly and the second driving assembly to move in the first direction or the second direction at the same time, and the first direction is opposite to the second direction; when the rack in the first driving assembly moves in the first direction or the rack in the second driving assembly moves in the second direction, the input shaft is driven to rotate in the same direction. And efficient collection and conversion of wave energy are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of intersection between marine engineering and renewable power generation, and in particular to a raft-type wave energy power generation device and system. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Wave Energy Converters (WECs) come in a wide variety of types, including overflow, oscillating water column, point absorption, swing, and raft. Raft-type WECs are particularly suitable for deep-sea environments with high energy levels and complex waves, due to their superior structural flexibility, flexible deployment methods, and strong sea-condition resistance. These systems typically consist of several semi-submerged buoys connected by flexible multi-degree-of-freedom connections to form an integrated structure. The relative motion between the rafts drives hydraulic power take-off (HPTO) systems located at the connection nodes, achieving efficient conversion of wave mechanical energy into electrical energy. Compared to rigid structures, raft structures are more adaptable to long-period surge environments. They not only have higher energy absorption efficiency but also possess good structural integrity, making them more adaptable to extreme sea conditions.

[0004] In the current raft-type wave energy system, when converting wave energy into electrical energy, only half of the movement is converting wave energy into electrical energy, and the efficiency of wave energy collection and conversion is low. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes a raft-type wave energy power generation device and system, which realizes the efficient collection and conversion of wave energy.

[0006] To achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a raft-type wave energy power generation device is proposed, comprising two adjacent pontoons; A generator, a first drive assembly, and a second drive assembly are arranged in the buoyancy box; the first drive assembly and the second drive assembly each include a rack, a gear, and a pawl; the rack is meshed with the gear, the pawl is meshed with the gear, and the pawl is connected to the input shaft of the generator; the rack is slidably connected to the buoyancy box, and the rack is hinged to the third drive assembly; The third drive assembly is hinged to the adjacent pontoon, and the third drive assembly can drive the racks in the first drive assembly and the second drive assembly to move simultaneously in the first direction or the second direction, and the first direction is opposite to the second direction; when the rack in the first drive assembly moves in the first direction or the rack in the second drive assembly moves in the second direction, the drive input shaft rotates in the same direction.

[0007] Furthermore, the third drive assembly includes two connecting rod assemblies and a connecting shaft; the two adjacent buoyancy boxes are hinged to the connecting shaft; the two connecting rod assemblies are hinged to the connecting shaft; and the two racks are hinged to the two connecting rod assemblies respectively.

[0008] Furthermore, adjacent sides of the two buoyancy boxes are hinged to the connecting shaft.

[0009] Furthermore, the connecting rod assembly includes a connecting rod and a vertical plate; one end of the connecting rod is hinged to one of the racks; the other end of the connecting rod is hinged to the vertical plate; and the vertical plate is hinged to the connecting shaft.

[0010] Furthermore, the two pawls in the first driving assembly and the second driving assembly are arranged in opposite directions.

[0011] Furthermore, the pawl is sleeved on the input shaft, the gear and the pawl are coaxially arranged; teeth matching the pawl are arranged inside the gear; and the pawl is meshedly connected with the gear.

[0012] Furthermore, the gear is connected to the buoyancy box, and the gear can rotate around its own axis.

[0013] Furthermore, two slide rails are provided outside the buoyancy box, and the two racks are respectively connected to the two slide rails and can move along the slide rails.

[0014] Furthermore, the connecting shaft is located at the lower part of the buoyancy box; and the two racks are located at the upper part of the buoyancy box.

[0015] In the second aspect, a raft-type wave energy power generation system is proposed, comprising the raft-type wave energy power generation device proposed in the first aspect.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a raft-type wave energy power generation device and system, in which a first drive assembly and a second drive assembly are arranged in a pontoon, and the first drive assembly and the second drive assembly both include a rack, a gear and a pawl; the rack is meshed with the gear, the pawl is meshed with the gear, and the pawl is connected to the input shaft of the generator; the rack is slidably connected to the pontoon, and the rack is hinged to the third drive assembly; the third drive assembly is hinged to the adjacent pontoon; under the action of waves, the third drive assembly can drive the racks in the first drive assembly and the second drive assembly to move in the first direction or the second direction at the same time, and when the rack in the first drive assembly moves in the first direction or the rack in the second drive assembly moves in the second direction, the input shaft is driven to rotate in the same direction, and the generator generates electricity; driven by waves, the input shafts can rotate in the same direction, so that the raft-type wave energy power generation device can generate electricity throughout the entire movement process, thereby improving the collection and conversion efficiency of wave energy.

[0017] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0019] Figure 1 A schematic diagram of the overall structure of a raft-type wave energy power generation device proposed in an embodiment of the present invention; Figure 2 This is a schematic structural diagram of the third drive assembly proposed in an embodiment of the present invention.

[0020] Among them: 1. first buoyancy box, 2. first rack, 3. second rack, 4. first pawl, 5. input shaft, 6. generator, 7. second pawl, 8. connecting shaft, 9. first vertical plate, 10. first connecting rod, 11. first slide rail, 12. second vertical plate, 13. second connecting rod, 14. second slide rail, 15. second buoyancy box. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and should not be understood as limiting the present invention.

[0025] In the present invention, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations of the present invention.

[0026] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0027] Example 1 Existing raft-based wave energy systems have achieved initial success in experimental verification and demonstration applications, but several key challenges remain in engineering applications: First, the current device structure suffers from unstable energy conversion efficiency in the face of complex, variable, nonlinear wave environments, lacking an optimization mechanism to adapt to wave spectrum characteristics; second, the reliability of the equipment during long-term offshore service and its operation and maintenance system are not yet fully developed, making it difficult to adapt to the operational scheduling requirements brought about by seasonal changes in wave resources; third, the existing hydraulic power extraction system (HPTO) lacks a coordination mechanism between rapid dynamic response and power output stability, limiting the system's widespread application in complex marine environments. Therefore, there is an urgent need to develop a new raft-based wave energy conversion system with strong adaptability, stable output, and support for seasonal operation and maintenance to meet the actual needs of large-scale development of deep-sea green energy.

[0028] Based on the above requirements, in this embodiment, a raft type wave energy power generation device is disclosed, such as Figure 1 、 Figure 2 As shown, it includes two adjacent pontoons; A generator 6, a first drive assembly, and a second drive assembly are provided in the pontoon 1; the first drive assembly and the second drive assembly each include a rack, a gear, and a pawl; the rack is meshed with the gear, the pawl is meshed with the gear, and the pawl is connected to the input shaft 5 of the generator; the rack is slidably connected to the pontoon, and the rack is hinged to the third drive assembly; The third drive assembly is hinged to the adjacent pontoon, and the third drive assembly can drive the racks in the first drive assembly and the second drive assembly to move simultaneously in the first direction or the second direction, and the first direction is opposite to the second direction; when the rack in the first drive assembly moves in the first direction or the rack in the second drive assembly moves in the second direction, the drive input shaft rotates in the same direction.

[0029] like Figure 1 As shown, the generator 6 used in this embodiment is placed inside the buoyancy box and connected to the buoyancy box; and the input shaft 5 of the generator 6 extends from both ends of the generator 6. When the input shaft 5 rotates, the generator 6 discharges.

[0030] The third driving assembly of this embodiment includes two connecting rod assemblies and a connecting shaft; the two adjacent buoyancy boxes are hinged to the connecting shaft; the two connecting rod assemblies are hinged to the connecting shaft; and the two racks are hinged to the two connecting rod assemblies respectively.

[0031] By providing a third drive assembly, when the two buoyancy boxes rotate relative to each other under the action of waves, the two racks in the first drive assembly and the second drive assembly are driven to move simultaneously in the first direction or the second direction. When the rack in the first drive assembly moves in the first direction or the rack in the second drive assembly moves in the second direction, the drive input shaft 6 rotates in the same direction, and the generator generates electricity. Therefore, the raft-type wave energy power generation device proposed in this embodiment can generate electricity throughout the entire movement process, thereby improving the collection and conversion efficiency of wave energy.

[0032] In this embodiment, the adjacent sides of the two buoyancy boxes are hinged to the connecting shaft 8, thereby reducing the transmission loss of wave energy and improving the utilization efficiency of wave energy.

[0033] In addition, in the raft-type wave energy power generation device proposed in this embodiment, the side of each pontoon can be connected to other pontoons, thereby connecting multiple pontoons into one or more rows.

[0034] like Figure 2 As shown, the two pontoons are a first pontoon 1 and a second pontoon 15 , and the first pontoon 1 and the second pontoon 15 have the same structure.

[0035] Two first support frames are provided on the side of the first buoyancy box 1 , and through holes are provided on the two first support frames. The connecting shaft 8 passes through the through holes and can rotate relative to the through holes to realize the hinge connection between the buoyancy box and the connecting shaft.

[0036] Two second support frames are set on the side of the second buoyancy box 15, and the two second support frames are hinged to the first hinge block and the second hinge block one by one; the first hinge block and the second hinge block are both connected to the connecting shaft 8 and can rotate around the axis of the connecting shaft 8.

[0037] Preferably, the first support frame and the second support frame are both in the form of triangular supports; the two first support frames are respectively located at both ends of the connecting shaft 8; the two hinge blocks are located on the inner sides of the two first support frames, and the two hinge blocks are located at both ends of the connecting shaft 8.

[0038] The connecting rod assembly comprises a connecting rod and a vertical plate; one end of the connecting rod is hinged to one of the racks; the other end of the connecting rod is hinged to the vertical plate; and the vertical plate is hinged to the connecting shaft.

[0039] Specifically, the third drive assembly includes a connecting shaft 8, a first connecting rod assembly and a second connecting rod assembly; the first connecting rod assembly includes a first vertical plate 9 and a first connecting rod 10; one end of the first vertical plate 9 is hinged to the first hinge block, and the other end of the first vertical plate 9 is hinged to one end of the first connecting rod 10; the other end of the first connecting rod 10 is hinged to the rack in the first drive assembly; the second connecting rod assembly includes a second vertical plate 12 and a second connecting rod 13; one end of the second vertical plate 12 is hinged to the second hinge block, and the other end of the second vertical plate 12 is hinged to one end of the second connecting rod 13; the other end of the second connecting rod 13 is hinged to the rack in the second drive assembly.

[0040] When, under the action of waves, the second pontoon 15 rotates counterclockwise relative to the first pontoon 1, the second pontoon 15 drives the two hinged blocks to rotate counterclockwise around the connecting shaft 8, thereby driving the two vertical plates to move downward, and the two connecting rods to rotate clockwise, ultimately driving the rack in the first drive assembly and the rack in the second drive assembly to move away from the generator 5, that is, driving the rack in the first drive assembly and the rack in the second drive assembly to move in the second direction at the same time, so that the generator 5 generates electricity; when, under the action of waves, the second pontoon 15 rotates clockwise relative to the first pontoon 1, the second pontoon 15 drives the two hinged blocks to rotate clockwise around the connecting shaft 8, thereby driving the two vertical plates to move upward, and the two connecting rods to rotate counterclockwise, ultimately driving the rack in the first drive assembly and the rack in the second drive assembly to move toward the generator 5, that is, driving the rack in the first drive assembly and the rack in the second drive assembly to move in the first direction at the same time, so that the generator generates electricity. This ensures that the generator can generate electricity during the ups and downs of the waves, thereby improving the utilization efficiency of wave energy.

[0041] In order to increase the moving distance of the first drive assembly and the second drive assembly, enable the generator to output as much electrical energy as possible, and further improve the energy conversion rate of wave energy, the connecting shaft 8 is arranged at the lower part of the pontoon; the rack in the first drive assembly and the rack in the second drive assembly are located at the upper part of the pontoon, so that the distance between the connecting shaft 8 and the rack in the first drive assembly and the rack in the second drive assembly is maximized.

[0042] The first drive assembly and the second drive assembly of this embodiment both include a rack, a gear and a pawl; the rack is slidingly connected to the buoyancy box, and one end of the rack is hinged to the third drive assembly; the rack is meshingly connected to the gear, the pawl is connected to the input shaft of the generator, and the pawl is meshingly connected to the gear; and the setting directions of the two pawls in the first drive assembly and the second drive assembly are opposite.

[0043] The pawl is sleeved on the input shaft, the gear and the pawl are coaxially arranged; teeth matching the pawl are arranged inside the gear; and the pawl is meshed with the gear.

[0044] The gear is connected to the buoyancy box, and the gear is able to rotate around its own axis.

[0045] The first drive assembly and the second drive assembly of this embodiment are symmetrically arranged at both ends of the input shaft 5 of the generator 6; in order to ensure the stability of the movement of the racks in the first drive assembly and the second drive assembly, this embodiment sets two slide rails on the outside of the buoyancy box, and the two racks are respectively connected to the two slide rails and can move along the slide rails; the slide rails provide guidance for the movement of the racks.

[0046] The two slide rails are the first slide rail 11 and the second slide rail 14; both slide rails include a track and a slider; the slider and the track are slidably connected; one end of the rack in the driving assembly is fixedly connected to the slider, and one end of the connecting rod in the two connecting rod assemblies is hinged to the slider; when the connecting rod rotates, the slider is driven to move along the track, and then the rack is driven to move through the slider.

[0047] like Figure 1 As shown, the first driving assembly includes a first rack 2, a first gear and a first pawl 4. One end of the first rack 2 is connected to the slider in the first slide rail 11, and the other end of the first rack 2 is meshed with the first gear; the first pawl 4 is sleeved on one end of the input shaft 6; teeth that cooperate with the first pawl 4 are provided inside the first gear, and the first pawl 4 is meshed with the first gear; when the first connecting rod assembly drives the first rack 2 to move in the direction away from the generator, that is, when the first rack 2 moves in the second direction, the first pawl 4 is released from the first gear and cannot prevent the first gear from rotating. At this time, the rotation of the first gear cannot drive the first pawl 4 and the input shaft of the generator to rotate synchronously; when the first connecting rod assembly drives the first rack 2 to move in the direction close to the generator, that is, when the first rack 2 moves in the first direction, the first pawl 4 can clamp the first gear, so that when the first gear rotates, it drives the first pawl 4 and the input shaft of the generator to rotate synchronously, and the generator generates electricity.

[0048] The second driving assembly includes a second rack 3, a second gear and a second pawl 7. One end of the second rack 3 is connected to the slider in the second slide rail 14, and the other end of the second rack 3 is meshed with the second gear; the second pawl 7 is sleeved on the other end of the input shaft 6; teeth that cooperate with the second pawl 7 are provided inside the second gear, and the second pawl 7 is meshed with the second gear; when the second connecting rod assembly drives the second rack 3 to move in the direction close to the generator, that is, when the second rack 3 moves in the first direction, the second pawl 7 is released from the second gear and cannot prevent the second gear from rotating. At this time, the rotation of the second gear cannot drive the second pawl 7 and the input shaft of the generator to rotate synchronously; when the second connecting rod assembly drives the second rack 3 to move in the direction away from the generator, that is, when the second rack 3 moves in the second direction, the second pawl 7 can clamp the second gear, so that when the second gear rotates, it drives the second pawl 7 and the input shaft of the generator to rotate synchronously, and the generator generates electricity.

[0049] When the second pontoon 15 rotates counterclockwise relative to the first pontoon 1 under the action of waves, the second drive assembly drives the input shaft of the generator to rotate, so that the generator generates electricity. When the second pontoon 15 rotates clockwise relative to the first pontoon 1 under the action of waves, the first drive assembly drives the input shaft of the generator to rotate, so that the generator generates electricity, thereby realizing efficient collection and conversion of wave energy.

[0050] The raft-type wave energy power generation device proposed in this embodiment can enable the generator to generate electricity during the relative rotation of the two buoyancy boxes under the action of waves, thereby improving the energy conversion efficiency of wave energy and realizing efficient collection and conversion of wave energy. Secondly, the raft-type wave energy power generation device proposed in this embodiment has a simple overall structure, which facilitates the adjustment of the overall mass of the device to adapt to the wave spectrum characteristics and further improve the utilization rate of waves.

[0051] Example 2 In this embodiment, a raft-type wave energy power generation system is disclosed, including a raft-type wave energy power generation device disclosed in embodiment 1.

[0052] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A raft-type wave energy power generation device, characterized in that: including two adjacent pontoons; A generator, a first drive assembly and a second drive assembly are arranged in the buoyancy box; the first drive assembly and the second drive assembly both include a rack, a gear and a pawl; The rack is meshed with the gear, the pawl is meshed with the gear, and the pawl is connected to the input shaft of the generator; The rack is slidably connected to the buoyancy box, and the rack is hinged to the third drive assembly; The third drive assembly is hinged to the adjacent pontoon, and the third drive assembly can drive the racks in the first drive assembly and the second drive assembly to move simultaneously in the first direction or the second direction, and the first direction is opposite to the second direction; when the rack in the first drive assembly moves in the first direction or the rack in the second drive assembly moves in the second direction, the drive input shaft rotates in the same direction.

2. A raft-type wave energy power generation device according to claim 1, characterized in that: The third driving assembly includes two connecting rod assemblies and a connecting shaft; the two adjacent buoyancy boxes are hinged to the connecting shaft; the two connecting rod assemblies are hinged to the connecting shaft; and the two racks are hinged to the two connecting rod assemblies respectively.

3. A raft-type wave energy power generation device according to claim 2, characterized in that: The connecting shaft is located at the lower part of the pontoon; the two racks are located at the upper part of the pontoon.

4. A raft-type wave energy power generation device according to claim 2, characterized in that: The adjacent sides of the two buoyancy boxes are hinged to the connecting shaft.

5. The raft type wave energy power generation device according to claim 2, characterized in that: The connecting rod assembly comprises a connecting rod and a vertical plate; one end of the connecting rod is hinged to one of the racks; the other end of the connecting rod is hinged to the vertical plate; and the vertical plate is hinged to the connecting shaft.

6. The raft type wave energy power generation device according to claim 1, characterized in that: The two pawls in the first drive assembly and the second drive assembly are arranged in opposite directions.

7. The raft type wave energy power generation device according to claim 1, characterized in that: The pawl is sleeved on the input shaft, and the gear and the pawl are coaxially arranged; teeth matching with the pawl are arranged inside the gear; and the pawl is meshed and connected with the gear.

8. The raft type wave energy power generation device according to claim 1, characterized in that: The gear is connected to the buoyancy box, and the gear can rotate around its own axis.

9. The raft type wave energy power generation device according to claim 1, characterized in that: Two slide rails are arranged outside the buoyancy box, and the two racks are respectively connected to the two slide rails and can move along the slide rails.

10. A raft-type wave energy power generation system, comprising a raft-type wave energy power generation device according to any one of claims 1 to 9.

Images