Multi-floating-body heaving type wave power generation device

Abstract

The utility model relates to the technical field of ocean wave energy power generation, and provides a multi-floating-body heaving type wave energy power generation device which comprises a base body platform and a hydraulic power generation system, the base body platform is connected with a plurality of wave absorbing floating bodies through hinge supporting arms, and the hinge supporting arms are in transmission connection with fixed pulley blocks. The double-outlet-rod hydraulic cylinder is connected with the hydraulic power generation system; according to the wave energy power generation device, the circular wave absorbing floating bodies are arranged on the periphery of the base body platform, so that the wave energy power generation device can absorb waves in all directions, and the wave energy conversion efficiency of the device is improved; the wave-absorbing floating body and the double-rod hydraulic cylinder are connected through the fixed pulley block and the cable, so that the hydraulic cylinder can be arranged at a position far away from the sea level, the corrosion degree of the hydraulic cylinder is reduced, and the reliability of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ocean wave energy power generation technical field provides a kind of multi-floater heaving type wave energy power generation device. BACKGROUND

[0002] With the continuous consumption of oil, coal and natural gas and other traditional fossil energy on earth, the reserves of these valuable resources are gradually decreasing. Therefore, in order to cope with this severe energy crisis, we must vigorously develop renewable energy.

[0003] At the same time, the use of fossil energy not only leads to the depletion of resources, but also causes serious environmental pollution problems. Especially the marine ecological environment, due to its relative fragility, the pollution generated in the process of fossil energy utilization has a huge impact on the marine environment. This makes us have to change the existing energy utilization structure and continuously improve the utilization proportion of clean energy to reduce the burden on the environment.

[0004] As a kind of offshore renewable clean energy, ocean wave energy has great development potential. Large-scale development and utilization of ocean wave energy not only helps to reduce the utilization proportion of fossil energy, improve the energy utilization structure, but also reduces the cost of energy utilization and reduces marine environmental pollution. Wave energy power generation device can be divided into three categories according to its working principle: oscillating buoy, oscillating water column and overtopping. Among them, the oscillating buoy wave energy power generation device has become one of the most built wave energy power generation devices because of its high conversion efficiency and easy standardization of energy conversion system.

[0005] The working principle of oscillating buoy wave energy power generation device is to use the periodic motion of wave-absorbing float under the action of wave to capture wave energy, convert wave energy into mechanical energy, and then drive hydraulic conversion system (or mechanical transmission system, etc.) to finally convert mechanical energy into electrical energy.

[0006] However, the current oscillating buoy wave energy power generation device has a common problem that the key power component, hydraulic cylinder, is easily corroded by seawater because it is placed underwater (such as WaveRoll device) or on the water surface (such as Pelamis device). In addition, the direction of wave on the sea surface changes frequently, and most wave energy power generation devices can only have high capture efficiency when the float is aligned with the direction of wave, and the efficiency of the device will decrease sharply when the wave is in other directions.

[0007] Chinese invention patent CN102454534A discloses a multi-float array type sea wave power generation device, which aims to effectively collect sea wave energy in a large area and a large range, and effectively transfer the collected sea wave energy to a generator. The invention utilizes the potential energy change of sea waves and the buoyancy of seawater to make the float move up and down, and then converts the up-and-down movement of the float into the rotational movement of a transmission shaft through a rack set and gear mechanism, and transmits the rotational movement to the generator through the transmission shaft, a one-way clutch and a gear, to drive the generator to generate electricity. Because it is a "multi-float array", it can collect sea wave energy in a large area. Because it relies on the up-and-down movement of the float to collect sea wave energy, it can collect sea wave energy in a large range between small and large sea waves.

[0008] The above patent mainly has the following deficiencies: 1. Complexity of structure: due to the involvement of multiple floats and complex mechanical transmission systems, the maintenance and repair of the device become complex and costly.

[0009] 2. Adaptability to marine environment: in harsh marine environments, the device is subject to corrosion, biofouling and physical damage, affecting the stability and lifespan of the device.

[0010] 3. Energy conversion efficiency: although the device can collect energy in a wide range of sea waves, the energy conversion efficiency is limited by the movement of the float and the efficiency of the mechanical device.

[0011] 4. Initial investment cost: the manufacture and deployment of the multi-float array type sea wave power generation device require a high initial investment cost.

[0012] 5. Power generation stability: the device cannot capture sea waves in all directions, and there is a problem of fluctuation in power generation. SUMMARY

[0013] The utility model aims at the shortage of prior art, proposes a kind of multi-float heaving wave energy power generation device, can overcome the problem that energy conversion system of oscillating buoy type wave energy power generation device is vulnerable to seawater corrosion, realizes all wave direction capture wave energy.

[0014] To achieve the above object, the utility model adopts the following technical scheme: a kind of multi-float heaving wave energy power generation device, including base platform and hydraulic power generation system, the base platform is connected with several wave-absorbing floats by hinged support arm, the hinged support arm is transmission coupled with fixed pulley set, it is connected with hydraulic power generation system by double-out rod hydraulic cylinder.

[0015] Further, the base platform as a whole presents a square structure, consisting of an underwater damping plate at the bottom, four sturdy support columns and a cabin platform at the top.

[0016] Further, the bottom underwater damping plate of the base platform is used for reducing the impact of waves on the whole device.

[0017] Further, the middle part of the top cabin platform of the base platform is hollow.

[0018] Further, the first fixed pulley is installed below the extension arm of each side of the base platform, which is used for changing the direction of force.

[0019] Further, the double-out-rod hydraulic cylinder can convert the heaving motion of waves into hydraulic energy, and the rod end of the outward rod is connected with the first steel wire rope, which is connected with the center position of the upper surface of the circular wave-absorbing float through the first fixed pulley.

[0020] Further, the circular wave-absorbing float is installed on the two supporting columns through the hinged supporting arm, and the wave-absorbing float makes up-and-down heaving motion to capture wave energy.

[0021] Further, the two branches connected with the outward cylinder barrel of the double-out-rod hydraulic cylinder are respectively provided with the first one-way valve and the second one-way valve, and the two branches connected with the inward cylinder barrel are respectively provided with the third one-way valve and the fourth one-way valve.

[0022] Further, when the wave-absorbing float makes up-and-down heaving motion under the action of waves, the double-out-rod hydraulic cylinder moves to push the hydraulic oil to flow in the hydraulic cylinder, and the hydraulic oil enters the hydraulic power generation system through the first one-way valve or the fourth one-way valve to drive the generator to generate electricity.

[0023] Further, the wave energy is captured and converted through the relative motion of the base platform and the wave-absorbing float.

[0024] The utility model has the advantages that (1) the circular wave-absorbing float is arranged around the base platform, so that the wave energy generation device can absorb waves in all directions, and the wave energy conversion efficiency of the device is improved.

[0025] (2) the wave-absorbing float and the double-out-rod hydraulic cylinder are connected through the fixed pulley set and the cable, so that the hydraulic cylinder can be arranged away from the sea level, the corrosion degree of the hydraulic cylinder is reduced, and the reliability of the device is improved. DRAWINGS

[0026] Figure 1 It is a three-dimensional appearance view of the multi-float heaving type wave energy generation device of the patent;

[0027] Figure 2 It is a plan view of the multi-float heaving type wave energy generation device of the patent;

[0028] Figure 3 It is a front view of the multi-float heaving type wave energy generation device of the patent;

[0029] Figure 4 is a kind of multi-floater heave type wave energy generation device A-A view of the present patent from the top;

[0030] Figure 5 is a kind of multi-floater heave type wave energy generation device double rod hydraulic cylinder oil circuit diagram of the present patent;

[0031] Figure 6 is a kind of multi-floater heave type wave energy generation device of the present invention, when wave-absorbing float is in intermediate position, the schematic diagram is shown;

[0032] Figure 7 is a kind of multi-floater heave type wave energy generation device, when wave-absorbing float moves upwards, the schematic diagram is shown;

[0033] Figure 8 is a kind of multi-floater heave type wave energy generation device, when wave-absorbing float moves downwards, the schematic diagram is shown;

[0034] In the figure: 1-top cabin platform;2-upper extension arm;3-hinged support arm;4-wave-absorbing float;5-double rod hydraulic cylinder;6-first fixed pulley;7-first steel wire rope;8-second steel wire rope;9-second fixed pulley;10-third fixed pulley;11-lower extension arm;12-support column;13-bottom underwater damping plate;14-outward rod;15-outward cylinder;16-inward cylinder;17-inward rod;18-first check valve;19-second check valve;20-third check valve;21-fourth check valve;22-hydraulic cylinder piston;23-oil tank. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0036] Embodiment 1

[0037] A kind of multi-floater heave type wave energy generation device, which can effectively convert wave energy into electric energy. The device mainly includes base platform, wave-absorbing float 4, hinged support arm 3, double rod hydraulic cylinder 5, fixed pulley set and hydraulic power generation system and other multiple key components.

[0038] Specifically, the base platform of this multi-floater heave type wave energy generator device presents a square structure as a whole, which is composed of a bottom underwater damping plate, four solid support columns 12 and a top cabin platform. The bottom underwater damping plate can effectively reduce the impact of waves on the entire device, improving the stability and durability of the device. The four support columns 12 provide solid support for the entire device, ensuring its stability on the sea surface.

[0039] The top cabin platform 1 is also designed with a hollow center, which not only reduces the overall weight but also does not affect the performance of the device. On each side of the top cabin platform 1, there are extension arms installed, which not only enhance the structural strength of the platform but also provide installation positions for other components of the device.

[0040] Under each upper extension arm 2 on each side, there is a first fixed pulley 6 installed. The role of these fixed pulleys is to change the direction of force in the subsequent power transmission process, so that the entire device can operate more efficiently. Near the intersection center of the cross-shaped support arm, there is a third fixed pulley 10 installed, which cooperates with the first fixed pulley 6 to complete the transmission and direction change of force.

[0041] Along the lower side of each edge, along the direction of the upper extension arm 2, there is a double-rod hydraulic cylinder 5 installed. These hydraulic cylinders are one of the core components of the entire device, which can convert the heaving motion of waves into hydraulic energy. The outer rod 14 of the double-rod hydraulic cylinder 5 is connected to the first steel wire rope 7, which extends vertically downward through the first fixed pulley 6 and is finally connected to the center position of the upper surface of the circular wave-absorbing float 4.

[0042] The circular wave-absorbing float 4 is installed on the two support columns 12 through the hinged support arm 3. This design allows the wave-absorbing float 4 to move up and down flexibly when driven by waves, effectively capturing wave energy. The design of the wave-absorbing float 4 not only improves the efficiency of energy capture but also enhances the adaptability of the entire device to waves.

[0043] On each side of the bottom underwater damping plate 13, there is also a lower extension arm 11 installed, and a second fixed pulley 9 is installed above these lower extension arms 11. The inner rod 17 of the double-rod hydraulic cylinder 5 is connected to the second steel wire rope 8, which extends vertically upward through the second fixed pulley 9 and the third fixed pulley 10 and is finally connected to the center position of the lower surface of the circular wave-absorbing float 4.

[0044] The double-out-rod hydraulic cylinder 5 is ingeniously designed. Two branches are connected to the outer cylinder 15, which are the first one-way valve 18 and the second one-way valve 19, respectively. The two branches connected to the inner cylinder 16 are the third one-way valve 20 and the fourth one-way valve 21, respectively. The first one-way valve 18 and the fourth one-way valve 21 are connected to the hydraulic power generation system, while the second one-way valve 19 and the third one-way valve 20 are connected to the oil tank 23, which can absorb oil from the oil tank 23.

[0045] When the wave-absorbing float 4 oscillates up and down under the action of waves, the double-out-rod hydraulic cylinder 5 will move accordingly, thereby pushing the hydraulic oil to flow in the hydraulic cylinder. The hydraulic oil enters the hydraulic power generation system through the first one-way valve 18 or the fourth one-way valve 21, and then drives the generator to generate electricity. In this way, wave energy is effectively converted into electrical energy, providing clean energy for human production and life.

[0046] In general, this multi-float heaving wave energy generation device realizes effective capture and efficient conversion of wave energy through its unique design, providing a new way of thinking and method for the development and utilization of renewable energy

[0047] Example 2

[0048] As Figures 1 to 5 shown, the present application relates to a multi-float heaving wave energy generation device, which mainly consists of a base platform, a wave-absorbing float 4, a hinged support arm 3, a double-out-rod hydraulic cylinder 5, a fixed pulley set, and a hydraulic power generation system.

[0049] The base platform has a square structure and mainly includes a top cabin platform 1, an upper extended arm 2, a lower extended arm 11, a support column 12, and a bottom underwater damping plate 13. The base platform is relatively stable in the ocean due to the presence of the bottom underwater damping plate 13 and its deep draft, and has a small motion response under the action of waves. Four circular wave-absorbing floats 4 are arranged around the base platform, evenly distributed on each side of the base platform. Each circular wave-absorbing float 4 is connected to two support columns 12 of the base platform through a hinged support arm 3, ensuring that the circular wave float can perform heaving motion under the action of waves, while limiting motion in other directions.

[0050] The top cabin platform 1 of the base platform is provided with an upper outrigger 2 at each side, and the end of the upper outrigger 2 is provided with a first fixed pulley 6. The bottom underwater damping plate 13 of the base platform is provided with a lower outrigger 11 at each side, and the end of the lower outrigger 11 is provided with a second fixed pulley 9. A double-rod hydraulic cylinder 5 is installed at the lower part of each side of the top cabin platform 1, and the right end of the double-rod hydraulic cylinder 5 is provided with a third fixed pulley 10. The outer rod 14 of the double-rod hydraulic cylinder 5 is connected to one end of a first steel wire rope 7, and the steel wire rope is connected to the upper surface of the circular wave-absorbing float 4 through the first fixed pulley 6. When the wave-absorbing float 4 moves downward in heave, the outer rod 14 of the double-rod hydraulic cylinder 5 can be pulled to move leftward. The inner rod 17 of the double-rod hydraulic cylinder 5 is connected to a second steel wire rope 8, and the second steel wire rope 8 is connected to the lower surface of the circular wave-absorbing float 4 through the third fixed pulley 10 and the second fixed pulley 9. When the wave-absorbing float 4 moves upward in heave, the inner rod 17 of the double-rod hydraulic cylinder 5 can be pulled to move rightward through the second steel wire rope 8, the third fixed pulley 10 and the second fixed pulley 9.

[0051] The outlet on the outer cylinder 15 of the double-rod hydraulic cylinder 5 is connected to two branches, the first branch is connected to a first one-way valve 18, and the first one-way valve 18 is connected to a high-pressure oil path leading to a hydraulic power generation system, and the second branch is connected to a second one-way valve 19, and the second one-way valve 19 is connected to an oil tank 23. The outlet on the inner cylinder 16 of the double-rod hydraulic cylinder 5 is also connected to two branches, the first branch is connected to a fourth one-way valve 21, and the fourth one-way valve 21 is connected to a high-pressure oil path leading to a hydraulic power generation system, and the second branch is connected to a third one-way valve 20, and the third one-way valve 20 is connected to the oil tank 23.

[0052] When the entire wave energy generation device is in the sea, the base platform can be regarded as a stator due to small motion response, and the wave-absorbing float 4 can be regarded as a rotor due to sensitive motion response in the wave and large heave displacement. Due to different motion amplitudes of the two, relative motion is generated, and work can be done by using the relative motion between the two.

[0053] When the device is in a small wave, the wave-absorbing float 4 is approximately in an equilibrium position, at this time, there is approximately no relative motion between the two, as shown in FIG. 2, and at this time, the piston of the double-rod hydraulic cylinder 5 is in a middle position. Figure 6

[0054] ​When the circular wave-absorbing float 4 moves downward relative to the base platform under the action of waves, the first steel wire rope 7 connected to the upper surface of the wave-absorbing float 4 will be pulled downward synchronously, and the first steel wire rope 7 will pull the outward rod 14 of the double-rod hydraulic cylinder 5 to move leftward due to engagement with the first fixed pulley 6, at this time, the piston 22 of the double-rod hydraulic cylinder 5 will also move leftward synchronously, compressing the internal hydraulic oil of the outward cylinder barrel 15, so that the hydraulic oil is input to the high-pressure hydraulic power generation system through the first one-way valve 18 to perform energy storage and hydraulic power generation. At the same time, due to the leftward movement of the piston, the internal volume of the inward cylinder barrel 16 increases, and the oil is sucked from the oil tank 23 through the third one-way valve 20, as shown in the figure. Therefore, when the wave-absorbing float 4 moves downward, the outward cylinder barrel 15 of the double-rod hydraulic cylinder 5 completes the high-pressure power generation process, and the inward cylinder barrel 16 completes the low-pressure oil absorption process. Figure 7

[0055] When the circular wave-absorbing float 4 moves upward relative to the base platform under the action of waves, the second steel wire rope 8 connected to the lower surface of the wave-absorbing float 4 will be pulled upward synchronously, and the second steel wire rope 8 will pull the inward rod 17 of the double-rod hydraulic cylinder 5 to move rightward due to engagement with the second and third fixed pulleys, at this time, the piston 22 of the double-rod hydraulic cylinder 5 will also move rightward synchronously, compressing the internal hydraulic oil of the inward cylinder barrel 16, so that the hydraulic oil is input to the high-pressure hydraulic power generation system through the fourth one-way valve 21 to perform energy storage and hydraulic power generation. At the same time, due to the rightward movement of the piston, the internal volume of the outward cylinder barrel 15 increases, and the oil is sucked from the oil tank 23 through the second one-way valve 19. Therefore, when the wave-absorbing float 4 moves upward, the inward cylinder barrel 16 of the double-rod hydraulic cylinder 5 completes the high-pressure power generation process, and the outward cylinder barrel 15 completes the low-pressure oil absorption process.

[0056] The above-mentioned circular wave-absorbing float 4 moves up and down under the action of waves, which will drive the double-rod piston rod to continuously move left and right, so that the internal volume of the inward and outward cylinder barrels 15 of the hydraulic cylinder continuously repeats the oil absorption and hydraulic power generation process, achieving the purpose of converting wave energy into electric energy.

[0057] In the wave energy power generation device of the present application, the hydraulic cylinder and the wave-absorbing float 4 are not directly connected, but are connected through the three sets of fixed pulleys and two sets of cables as a transition, so that the hydraulic cylinder can be installed below the top cabin platform 1 away from the sea surface, avoiding corrosion of seawater and greatly improving the service life of the hydraulic cylinder. In addition, since the wave-absorbing float 4 is arranged on all four sides of the entire device, it can absorb waves from all directions, which is conducive to improving the overall power generation capacity of the device.

[0058] ​The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A multiple floating body heave type wave power generation device comprising a base platform and a hydraulic power generation system, characterized by, The base platform is connected with several wave-absorbing floats through hinged support arms, which are connected with a fixed pulley set, and the fixed pulley set is connected with a hydraulic power generation system through a double-out-rod hydraulic cylinder.

2. A multiple floating body heave type wave power generation device according to claim 1, characterized in that, The base platform has a quadrangular structure, which is composed of an underwater damping plate at the bottom, four solid support columns and a cabin platform at the top.

3. A multiple floating body heave type wave power generation device according to claim 1, characterized in that, The underwater damping plate at the bottom of the base platform is used to reduce the impact of waves on the whole device.

4. A multiple floating body heave type wave power generation device according to claim 1, characterized in that, The middle part of the cabin platform at the top of the base platform is hollow.

5. A multiple floating body heave type wave power generation device according to claim 1, characterized in that, Each side of the base platform is provided with an extended arm, and a first fixed pulley is installed below the extended arm to change the direction of force.

6. A multiple floating body heave type wave energy power generation device according to any one of claims 1 to 5, characterized in that, The double-out-rod hydraulic cylinder can convert the heaving motion of waves into hydraulic energy, and the outer piston rod of the double-out-rod hydraulic cylinder is connected with a first steel wire rope, which is connected with the center of the upper surface of the circular wave-absorbing float through the first fixed pulley.

7. A multiple floating body heave type wave energy power generation device according to claim 6, characterized in that, The circular wave-absorbing float is installed on two support columns through hinged support arms, and the wave-absorbing float makes up-and-down heaving motion to capture wave energy.

8. A multiple floating body heave type wave energy power generation device according to claim 7, characterized in that, The outer cylinder of the double-out-rod hydraulic cylinder is connected with two branches, which are a first one-way valve and a second one-way valve, respectively; and the inner cylinder is connected with two branches, which are a third one-way valve and a fourth one-way valve, respectively.

9. A multiple floating body heave type wave energy power generation device according to claim 7 or 8, characterised in that, When the wave-absorbing float makes up-and-down heaving motion under the action of waves, the double-out-rod hydraulic cylinder moves accordingly, and pushes the hydraulic oil to flow in the hydraulic cylinder, and the hydraulic oil enters the hydraulic power generation system through the first one-way valve or the fourth one-way valve to drive the generator to generate electricity.

10. A multiple floating body heave type wave energy power generation device according to claim 7 or 8, characterized in that, Through the relative motion of the base platform and the wave-absorbing float, wave energy is captured and converted.

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