Air bag type self-adaptive tide level oscillation water column wave energy power generation device

Abstract

The utility model discloses an air bag type self-adaptive tide level oscillating water column wave energy power generation device, belongs to the field of wave energy, and solves the problem that the wave energy efficiency is reduced due to the fact that a water inlet of an OWC is excessively submerged in water due to the change of the tide level in the prior art. A gas chamber water inlet is formed in the lower portion of the side wall of the OWC gas chamber. The OWC air chamber is installed on the moving guide part in a sliding mode and slides in the length extending direction of the moving guide part. A moving part is arranged between the OWC air chamber and the moving guide part, and the OWC air chamber moves in the length extension direction of the moving guide part through the moving part; the OWC air chamber comprises a flexible air bag, and the whole or part of the OWC air chamber is formed after the flexible air bag is inflated and expanded. According to the air bag type self-adaptive tide level oscillation water column wave energy power generation device, the submerging depth of the water inlet is controlled through the variability of the flexible air chamber on the volume, and the utilization benefit and the stability feasibility of a wave energy utilization device are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of air bag type self-adapting tidal level oscillating water column wave energy power generation device, belong to wave energy field. BACKGROUND

[0002] Under the threat of fossil energy increasingly scarce and environmental deterioration, it is essential to develop renewable energy such as ocean energy. The traditional wave energy converter is based on electromagnetic generator, which has complex structure, large volume, high cost, low reliability and low efficiency. People began to use the oscillating water column (OWC) converter with unique advantages, which can convert wave energy at low frequency.

[0003] The main components of the oscillating water column wave energy power generation device include an air chamber and a turbine. When the wave approaches the device, water enters the air chamber to push the water level up, increasing the air pressure in the air chamber. Air is ejected at high speed through the air outlet. When the trough approaches the air chamber, water is drawn out of the air chamber, the air pressure decreases, and external air enters the air chamber at high speed, driving the turbine to rotate. The turbine drives the generator to rotate, thereby converting wave energy into electrical energy.

[0004] The water pressure at the air chamber inlet (2) is an important indicator of air chamber operation. The water pressure at the air chamber inlet (2) affects the inlet pressure of the turbine, thereby affecting the power generation efficiency of the power generation device. Due to the change of tidal level, the water inlet of OWC is submerged in water too deep, and excessive water depth will reduce the wave energy efficiency and affect the overall power generation stability and efficiency of the device. SUMMARY

[0005] The utility model provides a kind of air bag type self-adapting tidal level oscillating water column wave energy power generation device, the submergence depth of water inlet is controlled by the variability of the volume of flexible air chamber, to improve the utilization efficiency and stability feasibility of wave energy utilization device.

[0006] The technical scheme adopted by the utility model is an air bag type self-adapting tidal level oscillating water column wave energy power generation device, comprising an OWC air chamber, and the lower part of the side wall of the OWC air chamber has an air chamber water inlet.

[0007] The air bag type self-adapting tidal level oscillating water column wave energy power generation device further comprises a moving guide part.

[0008] The OWC air chamber is slidably installed on the moving guide part and slides along the length extension direction of the moving guide part.

[0009] The OWC air chamber and the moving guide part have a moving part, and the OWC air chamber moves along the length extension direction of the moving guide part through the moving part.

[0010] The OWC air chamber includes a flexible air bag, and the OWC air chamber is formed by inflating and expanding the flexible air bag entirely or partially.

[0011] The optimized self-adapting tidal level oscillating water column wave energy power generation device has a counterweight on the lower end or the side wall of the OWC air chamber.

[0012] The optimized self-adapting tidal level oscillating water column wave energy power generation device further comprises an elastic limiting binding ring, which is sleeved on the OWC air chamber and fixed relative to the OWC air chamber.

[0013] The elastic limiting binding ring has a moving part at the rear part, and the moving guide part has a groove extending along the length direction, and the moving part is installed in the groove of the moving guide part and slides along the groove.

[0014] The optimized self-adapting tidal level oscillating water column wave energy power generation device has a flexible air bag part of the OWC air chamber formed by a plurality of sub-air bags, and the adjacent two sub-air bags have a communication port, and the interiors of the adjacent two sub-air bags are communicated through the communication port.

[0015] The optimized self-adapting tidal level oscillating water column wave energy power generation device has a moving part comprising a pulley block, and the pulley block comprises a plurality of pulleys; the pulleys are rotationally connected with the elastic limiting binding ring through shafts; and the pulleys are in rolling contact with the inner wall of the moving guide part.

[0016] The optimized self-adapting tidal level oscillating water column wave energy power generation device has a moving part comprising a water breaking unit.

[0017] The water breaking unit is a wedge-shaped block with a pointed end, and the upper end and the lower end of the pulley block each has a water breaking unit; and the pointed end of the water breaking unit is arranged at the end of the water breaking unit away from the pulley block.

[0018] The optimized self-adapting tidal level oscillating water column wave energy power generation device has a wave concentrating plate on each side of the water inlet of the OWC air chamber; and the wave concentrating plates on the two sides of the water inlet are arranged at an angle.

[0019] The technical scheme of the application replaces the general rigid cavity with a flexible air bag with variable volume, and uses a guide rail to stably realize self-adapting tidal level. The variable volume of the flexible cavity is used to control the submergence depth of the water inlet, aiming to improve the utilization efficiency and stable feasibility of the wave energy utilization device. The volume of the air bag is controlled to ensure that the water inlet of the device is always at a reasonable submergence depth, so that the wave energy resources can be more stably and efficiently utilized.

[0020] The adaptive tide OWC of the application can not only improve wave energy conversion efficiency and stability, but also reduce device damage risk and maintenance cost. The flexible air bag with variable volume can also provide certain buoyancy support for offshore equipment requiring variable buoyancy, achieve the effect of sharing the platform, utilize the electric energy generated by the device to further reduce equipment cost, and the functional characteristics of power generation stability and variable buoyancy make the device have more application potential on the sea. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a structural schematic diagram of the OWC air chamber of the application when the OWC air chamber is entirely flexible air bags;

[0022] Figure 2 Fig. 2 is a structural schematic diagram of the OWC air chamber when the OWC air chamber is entirely flexible air bags;

[0023] Figure 3 Fig. 3 is a structural schematic diagram of the elastic limiting binding ring of the application;

[0024] Figure 4 Fig. 4 is a structural schematic diagram of the OWC air chamber when the lower half of the OWC air chamber is a flexible air bag. DETAILED DESCRIPTION

[0025] The technical characteristics of the utility model will be further described below in combination with the drawings and specific embodiments.

[0026] As shown in the drawings, the utility model is an air bag type adaptive tide oscillating water column wave energy power generation device, which uses a flexible air bag as an OWC device cavity, is fixed on a rigid guide rail through an elastic limiting binding ring 3, changes the cavity buoyancy by using the variability of the flexible air bag 5 to provide a suitable submergence depth for the device inlet 2, and provides a more stable displacement process for the device through the guide rail system behind the device, thereby providing protection for the safety of the device.

[0027] Specifically, the air bag type adaptive tide oscillating water column wave energy power generation device of the application includes an OWC air chamber 5 which is hollow. In the application, the upper part of the OWC air chamber 5 has an exhaust port which is in communication with the inside, the exhaust port is in communication with the air inlet driving port of the turbine device, and the side wall of the OWC air chamber 5 has a water inlet 2 which is in communication with the inside. The seawater enters the OWC air chamber 5 through the water inlet 2 under the action of wave energy, pushes the air in the OWC air chamber 5 to enter the turbine device through the exhaust port, and drives the turbine device to generate electricity.

[0028] In the application, the OWC air chamber 5 includes a flexible air bag and other auxiliary components, wherein the OWC air chamber 5 is entirely or partially formed by the inflation of the flexible air bag.

[0029] In this embodiment, the OWC air chamber 5 is formed by splicing several sub-air bags, and the adjacent two sub-air bags are connected through a communication port.

[0030] In this embodiment, the main structure of the OWC air chamber 5 is formed by inflating and expanding the flexible air bag. In other embodiments, the main structure of the OWC air chamber 5 can be partially formed by inflating and expanding the flexible air bag, for example, the OWC air chamber 5 has the upper half of the existing OWC air chamber structure, the lower half is formed by inflating and expanding the flexible air bag, and the middle part is connected by sealing glue or the annular opening of the flexible air bag is pressed onto the upper opening of the existing OWC air chamber structure by a flange ring. Of course, the OWC air chamber 5 can also be in the form of a flexible air bag in the middle and the upper and lower ends of the existing OWC air chamber structure. The specific connection method can use other existing connection methods, which will not be described here.

[0031] In this embodiment, the moving guide part 4 can use the form of a strip-shaped guide rail. In other embodiments, the moving guide part 4 can be a strip-shaped guide groove constructed on the side of the offshore foundation of the wave energy power generation facility.

[0032] In this embodiment, the length extension direction of the moving guide part 4 can be arranged in the direction perpendicular to the sea level. In other embodiments, the length extension direction of the moving guide part 4 can also be arranged at an acute or obtuse angle with the sea level. The angle of arrangement needs to refer to the wave energy state of the geographical position where the oscillating water column wave energy power generation device is arranged, as well as the geological and climatic conditions.

[0033] The specific draft of the moving guide part 4 is determined according to the local historical maximum and minimum tide level, to ensure that the length of the guide rail can cover the tide level and prevent the length of the guide rail from being insufficient.

[0034] The OWC air chamber 5 is slidably installed on the moving guide part 4 and slides along the length extension direction of the moving guide part 4. By sliding the OWC air chamber 5, the water pressure at the air chamber water inlet 2 at the lower end of the OWC air chamber 5 can be changed, thereby ensuring better power generation efficiency.

[0035] In this embodiment, the water pressure sensing device 6 is arranged on the elastic limiting ring 3 located directly above the water inlet 2 of the air chamber to sense the water pressure at the corresponding position. In this embodiment, the water pressure sensing device 6 can adopt a water pressure sensor, which is a commonly used pressure sensor in industrial practice and is widely used in various industrial automation environments, water conservancy and hydropower engineering, etc. The water pressure sensor in this embodiment is a diffused silicon type water pressure sensor, and the working principle is that the pressure of the measured water pressure directly acts on the diaphragm of the sensor, causing the diaphragm to produce a micro displacement proportional to the water pressure, causing the resistance value of the sensor to change, and an electronic circuit is used to detect this change and convert a standard measurement signal corresponding to the pressure to output.

[0036] In this embodiment, the signal output end of the water pressure sensing device 6 is connected to the signal input end of the industrial control host computer, and the water pressure signal is transmitted to the industrial control host computer through a signal transmission protocol such as HART signal protocol, and the operator can read it through the display of the industrial control host computer. The industrial control host computer in this embodiment can be designed using C#WPF language, and this type of host computer can communicate with sensors and PLCs using the MVVMLight framework. Real-time display of alarm information, automatic saving of production data to the database, and implementation of servo control and manual IO control. This structure is a commonly used industrial control device in the prior art, and most industrial control manufacturers such as Siemens, ABB, and Schneider provide ready-made devices. Therefore, further description is not provided here.

[0037] The water pressure sensing device 6 is used to monitor the average water pressure at the water inlet 2 in real time. By detecting the water pressure at the water inlet, it can be determined whether the current submergence depth of the water inlet is within a reasonable range. If the average water pressure is too large, it indicates that the current submergence depth is too large, and the power generation efficiency is insufficient. Therefore, the air bag controller integrated in the hollow elastic limiting ring 3 can be driven to increase the volume of the air bag and reduce the submergence depth of the water inlet, so that it returns to a reasonable range. When it returns to a reasonable range, the air bag controller stops working, and vice versa.

[0038] In this embodiment, a rigid air bag controller 9 is arranged outside the hollow elastic limiting ring 3 at a distance. The lower part of the rigid air bag controller 9 is mainly provided with a rigid structure connected by four hydraulic telescopic rods 10, and the rigid structure is rigidly connected to the bottom of the air chamber. The flexible air bag is composed of double-layer materials, the inner layer material has a larger Young's modulus, and the outer layer material has a relatively smaller Young's modulus, which can ensure that the air bag deforms outward.

[0039] The OWC air chamber 5 is connected to the moving guide part 4 through the elastic limiting ring 3. The elastic limiting ring 3 is sleeved on the OWC air chamber 5 and is fixed relative to the OWC air chamber 5 by welding.

[0040] In this embodiment, the elastic limiting ring 3 is tightly pressed on the surface of the OWC air chamber 5 and is fixed by friction. In other embodiments, the elastic limiting ring 3 can be connected with the OWC air chamber 5 by adhesive, binding or other fixing methods. The selection of the fixing method between the elastic limiting ring 3 and the OWC air chamber 5 needs to refer to the wave energy state of the geographical location where the oscillating water column wave energy device is installed, as well as the geological and climate conditions.

[0041] The elastic limiting ring 3 has a moving part at the rear part, and the moving guide part 4 has a groove body arranged along the length extension direction. The moving part is installed in the groove body of the moving guide part 4. The OWC air chamber 5 slides on the moving guide part 4 through the moving part.

[0042] In this embodiment, the elastic limiting ring 3 is made of nylon ring and is integrally injection molded, which can adapt to the corrosion environment of the sea and can have a longer service life. In other embodiments, a metal ring body made of stainless steel, copper, manganese steel or the like can be used. In order to improve corrosion resistance, a rubber coating layer or a nylon coating layer can be covered on the surface of the metal ring body.

[0043] The elastic limiting ring 3 has a moving part at the rear part, and the moving guide part 4 has a groove body arranged along the length extension direction. The moving part is installed in the groove body of the moving guide part 4 and slides along the groove body.

[0044] The moving part includes a pulley block, and the pulley block includes a plurality of pulleys 7. In this embodiment, four groups of pulleys 7 are arranged in the pulley block. The pulleys 7 are rotationally connected with the elastic limiting ring 3 through axles, and the pulleys 7 are in rolling contact with the inner wall of the moving guide part 4.

[0045] The water breaking unit 8 is a wedge-shaped block with a sharp end, and the upper end and the lower end of the pulley block each has a water breaking unit 8. The sharp end of the water breaking unit 8 is constructed at the end of the water breaking unit 8 away from the pulley block.

[0046] The elastic limiting ring 3 has a wheel frame, and the axles of the pulleys 7 are rotationally connected with the wheel frame through bearings. The two water breaking units 8 are fixed with the elastic limiting ring 3, and all the pulleys 7 are located between the two water breaking units 8. Part of the surface of the water breaking unit 8 can be in sliding contact with the inner wall of the groove body of the moving guide part 4 or can be spaced apart, and the pulleys 7 are in rolling contact with the inner wall of the groove body of the moving guide part 4. Through the cooperation of the moving part and the moving guide part 4, the lifting and lowering movement direction of the OWC air chamber 5 can be limited, and the shaking of the OWC air chamber 5 during the movement can be limited. The stability of the device during the lifting and sinking of the OWC air chamber 5 is improved, and at the same time, the OWC air chamber 5 has a smoother movement when adjusting the immersion depth of the air inlet 2.

[0047] In other embodiments, the moving part can also adopt the form of a full pulley block or a slider alone, and the specific form of the moving part can be selected according to the sea conditions of the sea area where the oscillating water column wave energy power generation device is installed.

[0048] In this embodiment, the water breaking unit 8 is a wedge-shaped block, and the end of the water breaking unit 8 away from the pulley 7 has a pointed end. The pointed end of the water breaking unit 8 can play a role in breaking water during the movement of the moving part, reducing the water resistance of the water breaking unit 8 and the entire moving part during the movement, and avoiding the situation of difficulty in movement caused by excessive water resistance.

[0049] The lower end of the OWC air chamber 5 has a counterweight, which can adopt the form of a lead block, a stainless steel block, a solid nylon block, etc. with a large density, or a form of a steel block wrapped with a rubber film.

[0050] The OWC air chamber 5 has a wave concentrator 1 on each side of the air chamber water inlet 2, and the wave concentrators 1 on both sides of the air chamber water inlet 2 are arranged at an angle. The angle between the wave concentrators 1 can be an acute angle or an obtuse angle, and in special cases, the angle between the two wave concentrators 1 can be perpendicular. The wave concentrators 1 can be fixed on the OWC air chamber 5 or the elastic limiting binding ring 3, and the specific fixing position is analyzed according to the sea conditions of the sea area where the device is located.

[0051] In this embodiment, the specific implementation process of self-adapting to the tide level is as follows: when the water pressure sensing device 6 detects that the water pressure at the air chamber water inlet 2 is too large, which means that the liquid level in the air chamber is too large and exceeds the reasonable range, the air bag controller 9 is started to control the hydraulic telescopic rod 10 to retract. The air bag controller 9 can be started manually or automatically, and in this embodiment, a manual starting mode is adopted to simplify the structure. At this time, the outside of the air bag gradually relaxes, the overall volume of the air bag increases, the buoyancy increases, the device as a whole moves upward, the water pressure at the water inlet 2 gradually decreases to a reasonable range, and then the air bag controller 9 stops working.

[0052] Conversely, when the water pressure sensing device 6 detects that the water pressure at the water inlet 2 is too small, which means that the liquid level in the air chamber is too large and exceeds the reasonable range, the air bag controller 9 is started to control the hydraulic telescopic rod 9 to extend. At this time, the outside of the air bag gradually tightens, the overall volume of the air bag decreases, the buoyancy decreases, the device as a whole moves downward, the water pressure at the water inlet 2 gradually decreases to a reasonable range, and then the air bag controller 9 stops working.

[0053] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Within the scope of the present application, changes, modifications, additions or replacements made by ordinary skilled in the art should be within the protection scope of the present application.

Claims

1. An airbag type self-adapting tidal level oscillating water column wave energy power generation device, comprising an OWC air chamber (5), the lower part of the side wall of the OWC air chamber (5) is provided with an air chamber water inlet (2); characterized in that: The mobile guide part (4) is further included; The OWC air chamber (5) is slidingly installed on the mobile guide part (4) and slides along the length extension direction of the mobile guide part (4); The OWC air chamber (5) and the mobile guide part (4) have a mobile part therebetween, and the OWC air chamber (5) moves along the length extension direction of the mobile guide part (4) through the mobile part; The OWC air chamber (5) includes a flexible air bag, and the OWC air chamber (5) is formed after the flexible air bag is inflated and expanded in whole or in part.

2. The air bag type self adaptive tidal level oscillating water column wave energy device according to claim 1, characterized in that: The OWC air chamber (5) has a counterweight on the lower end or the side wall thereof.

3. The air-bag type self adaptive tidal level oscillating water column wave energy device according to claim 1, wherein: The elastic limiting binding ring (3) is further included, which is sleeved on the OWC air chamber (5) and is fixed opposite to the OWC air chamber (5); The elastic limiting binding ring (3) has a mobile part at the rear part thereof, and the mobile guide part (4) has a groove body arranged along the length extension direction thereof, and the mobile part is installed in the groove body of the mobile guide part (4) and slides along the groove body.

4. The air bag type self adaptive tidal level oscillating water column wave energy device according to claim 1, characterized in that: The flexible air bag part of the OWC air chamber (5) is formed by splicing a plurality of sub-air bags, and the adjacent two sub-air bags have a communication port therebetween, and the interiors of the adjacent two sub-air bags are communicated through the communication port.

5. The air-bag type self adaptive tidal level oscillating water column wave energy device according to claim 1, wherein: The mobile part includes a pulley block, and the pulley block includes a plurality of pulleys (7); the pulleys (7) are rotationally connected with the elastic limiting binding ring (3) through shafts; and the pulleys (7) are in rolling contact with the inner wall of the mobile guide part (4).

6. The air bag type self adaptive tidal level oscillating water column wave energy device according to claim 5, characterized in that: The mobile part includes a water breaking unit (8); The water breaking unit (8) is a wedge-shaped block and has a sharp end; the upper end and the lower end of the pulley block each has a water breaking unit (8); and the sharp end of the water breaking unit (8) is arranged at the end of the water breaking unit (8) away from the pulley block.

7. The air-bag type self adaptive tidal level oscillating water column wave energy device according to claim 1, wherein: The OWC air chamber (5) has a wave board (1) on each side of the air chamber water inlet (2); and the wave boards (1) on the two sides of the air chamber water inlet (2) are arranged at an angle.

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