Oscillating float wave energy device based on air pressure waterproofing

Abstract

This invention discloses an oscillating float-type wave energy device based on air pressure waterproofing, belonging to the technical field of oscillating float-type wave energy device reliability. It includes a float body with a sealed inner cavity; a filler, located inside the float body, which is a lightweight material whose volume is unaffected by changes in air pressure within the float body's cavity; a sleeve, fixedly connected to the float body, open at both ends, with the upper end located within the inner cavity of the float body and the lower end extending from the bottom of the float body; a guide rod, the upper part of which is fitted inside the sleeve, and the lower end extending out of the sleeve and hinged to a seabed anchor or a submerged body at a fixed depth, with a gap between the guide rod and the sleeve; a rolling element, forming a linear rolling pair with the sleeve and guide rod; and a water blocker, fitted outside the bottom end of the sleeve and fixedly connected to the sleeve, having a water blocker chamber, a water passage hole, and a vent hole, with the water passage hole located at the bottom of the water blocker and the vent hole connecting the water blocker chamber to the inner cavity of the sleeve. This invention solves the waterproofing problem of existing oscillating float-type wave energy devices, and features a simple structure, reliable waterproofing, and low cost.

Description

Technical Field

[0001] This invention belongs to the field of reliability technology of oscillating float-type wave energy devices, specifically relating to an oscillating float-type wave energy device based on air pressure waterproofing. Background Technology

[0002] Wave energy, belonging to ocean energy, is increasingly valued by coastal countries due to its advantages such as high energy flux density, wide distribution, large reserves, and green sustainability. Currently, there are many types of wave energy utilization technologies. Oscillating float wave energy devices have become a hot topic in wave energy research due to their simple and reliable structure, low manufacturing, deployment, and maintenance costs, and high efficiency. Oscillating float wave energy devices generally consist of two main components: a mover and a stator. The mover and stator together form a sliding pair, allowing relative motion between them under wave action. The oscillating float wave energy device utilizes this motion to collect wave energy and generate electricity; therefore, the sliding pair formed by the mover and stator is the core component of the oscillating float wave energy device.

[0003] Because oscillating buoy-type wave energy devices are located in marine environments, seawater is corrosive and prone to harboring organisms. Furthermore, seawater often carries sediment, resulting in serious "four-proof" (waterproof, corrosion-proof, sand-proof, and biofouling-proof) problems for the moving parts of existing oscillating buoy-type wave energy devices. This problem remains unresolved and is one of the main obstacles to the practical application of oscillating buoy-type wave energy devices. The key to solving the "four-proof" problem is waterproofing. Once the waterproofing problem is solved, the problems of corrosion prevention, sand prevention, and biofouling prevention will be readily resolved. Therefore, developing a highly reliable and low-cost waterproofing method has become an urgent need for the practical application of oscillating wave energy devices.

[0004] Currently, oscillating float-type wave energy devices often employ dynamic sealing technology for waterproofing. However, due to the strong corrosiveness of seawater and its frequent carrying of sediment, dynamic sealing is extremely expensive and its reliability faces serious challenges. In recent years, some low-cost waterproofing solutions have emerged for oscillating float-type wave energy devices. For example, Chinese Patent 202311817900.0 discloses a waterproofing component with a semi-sealed shell installed at the top of the sleeve, with openings at the top and bottom to allow the chain to pass through, thus preventing seawater from entering the equipment compartment. However, since gaps inevitably exist between the shell openings and the chain, a small amount of seawater will still be brought into the equipment compartment when the chain is running. In addition, the moving pair composed of the guide rod and the sleeve is normally immersed in seawater, posing a serious challenge to the service life and performance stability of the moving pair. Therefore, although this waterproofing solution is low in cost, its waterproofing effect is poor. In Chinese patent CN212054971U, a waterproof partition is installed inside the spring cable winding chamber to isolate the pulley from the cable winding mechanism. The bottom of one side of the cable winding mechanism is inclined in a funnel shape. Seawater brought into the spring cable winding chamber by the cable will be discharged again through the funnel-shaped inclined setting. Although this solution avoids seawater entering the transmission and power generation chamber, the cable winding channel, the cable winding mechanism, and the transmission shaft connecting the pulley and the cable winding mechanism will still come into contact with seawater, which still poses a serious reliability problem. Summary of the Invention

[0005] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent.

[0006] This invention proposes an oscillating float-type wave energy device based on air pressure waterproofing, which solves the waterproofing problem of existing oscillating float-type wave energy devices and features simple structure, reliable waterproofing, and low cost.

[0007] This invention provides an oscillating float-type wave energy device based on air pressure waterproofing, comprising a float body, filler, sleeve, guide rod, rolling element, and water blocker; the inner cavity of the float body is a sealed chamber; the filler, located within the inner cavity of the float body, is a lightweight material whose volume does not change with the air pressure within the inner cavity of the float body; the sleeve is located at the center of the float body and is fixedly connected to the float body, with openings at both ends, the upper end located within the inner cavity of the float body, and the lower end extending from the bottom of the float body; the upper part of the guide rod is sleeved within the sleeve, and the lower end extends out of the sleeve and is hinged to a seabed anchor. On a submerged body at a fixed depth, there is a gap between the guide rod and the casing, preventing direct contact; the rolling element, casing, and guide rod form a linear rolling pair to reduce friction between the guide rod and casing under wave action; the water blocker is fitted at the bottom of the casing, with its upper end fixedly connected to the casing, and has a water blocker chamber, a water passage, and a vent. The water passage is located at the bottom of the water blocker, and the vent connects the water blocker chamber to the inner cavity of the casing, thereby connecting the water blocker chamber to the inner cavity of the float; the cross-sectional area of ​​the guide rod is... S 1. The cross-sectional area of ​​the inner cavity of the water blocker is... S 2,S 2 = (20~30) S 1.

[0008] In some embodiments, the pre-filled air pressure of the buoy's internal cavity is [value missing]. P 预充 , P 预充 The following conditions must be met:

[0009]

[0010] in, ρ The density of seawater in the area where the pressure-resistant, waterproof oscillating float-type wave energy device is located is given in kilograms per cubic meter (kg / m³). 3 ); g This is the gravitational constant, with units of meters per second squared (m / s). 2 ); H The distance from the static draft of the buoy to the center height of the water blocker is expressed in meters (m). L The height of the water blocker's inner cavity is expressed in meters (m). P 预充 The pressure inside the buoy's internal cavity is an absolute pressure value in Pascals (Pa). 10.33 refers to the height of a water column in meters (m) corresponding to one standard atmosphere.

[0011] In some embodiments, the effective pressurized volume of the floating body is less than [amount missing]. ,in h This represents the increase in the maximum draft of the floating body relative to its static draft, expressed in meters (m).

[0012] In some embodiments, the effective pressurized volume of the floating body is the remaining space volume of the floating body after the filler material is placed inside.

[0013] In some embodiments, the rolling element includes a guide rod rolling element and a sleeve rolling element. The guide rod rolling element is installed at the top of the guide rod and contacts the inner wall of the sleeve, while the sleeve rolling element is installed at the bottom of the sleeve and contacts the outer wall of the guide rod. The guide rod, sleeve, and rolling element form a linear rolling pair to enable the float to generate relative motion along the guide rod under the action of waves.

[0014] In some embodiments, a transmission structure is also included, which is connected to the guide rod to convert the wave energy captured by the buoy into mechanical energy.

[0015] In some embodiments, an energy conversion structure is also included, which is connected to the transmission structure to convert mechanical energy into electrical energy.

[0016] In some embodiments, the lower end of the guide rod extends out of the sleeve and is hinged to an anchor rock on the seabed or a submersible at a fixed depth. The guide rod and the sleeve do not contact each other directly, and there is a gap between them.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention provides an oscillating float-type wave energy device based on air pressure waterproofing. Utilizing the principle of communicating vessels, the seawater level in the gap between the guide rod and the sleeve is flush with the seawater level inside the water blocker. Since the cross-sectional area of ​​the water blocker's inner cavity is much larger than that of the guide rod, the fluctuation amplitude of the seawater level inside the water blocker caused by the movement of the guide rod within the sleeve is greatly reduced. Furthermore, due to the placement of the filler, the effective pressurized volume of the float's sealed chamber is significantly reduced compared to the volume of the water blocker's chamber. The water blocker can limit the fluctuation range of the seawater level inside the water blocker caused by changes in air pressure within the wave energy device's float to the water blocker's interior. This prevents seawater from rising to the rolling components at the bottom of the sleeve and also avoids the leakage of gas inside the float along the sleeve and the water blocker. Thus, it reliably and cost-effectively solves the waterproofing problems of the moving pair and the float's chamber in the wave energy device, thereby completely solving the "four-proof" problem of the oscillating float-type wave energy device. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the pressure-waterproof oscillating float-type wave energy device provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram showing the dimensions of the oscillating float-type wave energy device based on air pressure waterproofing provided in an embodiment of the present invention;

[0022] Figure descriptions: 1. Float; 2. Sleeve; 3. Guide rod; 4. Water blocker; 5. Water passage hole; 6. Transmission structure; 7. Energy conversion structure; 8. Guide rod rolling element; 9. Filler; 10. Sleeve rolling element; 11. Vent hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments provided by this invention without inventive effort are within the scope of protection of this invention.

[0024] Obviously, the accompanying drawings described below are merely some examples or embodiments of the present invention. Those skilled in the art can apply the present invention to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, modifications to design, manufacturing, or production based on the technical content disclosed in this invention are merely conventional technical means and should not be construed as insufficient disclosure of the present invention.

[0025] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention may be combined with other embodiments without conflict.

[0026] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," "an," "the," and similar words used in this invention do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this invention are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," "coupled," and similar words used in this invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A plurality" used in this invention refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships may exist; for example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the objects before and after it are in an "or" relationship.

[0027] This invention provides an oscillating float-type wave energy device based on air pressure waterproofing. Figure 1 This is a schematic diagram of the structure of an oscillating float-type wave energy device based on air pressure waterproofing according to an embodiment of the present invention. (Reference) Figure 1As shown, the pressure-waterproof oscillating float-type wave energy device includes a float 1, a filler 9, a sleeve 2, a guide rod 3, rolling elements, and a water blocker 4. The inner cavity of the float 1 is a sealed chamber. The filler 9 is located in the inner cavity of the float 1 and is a lightweight material whose volume does not change with the air pressure inside the float 1. The sleeve 2 is located at the center of the float 1 and is fixedly connected to the float 1. It is open at both ends, with the upper end located in the inner cavity of the float 1 and the lower end extending from the bottom of the float 1. The upper part of the guide rod 3 is sleeved in the sleeve 2, and the lower end extends out of the sleeve 2 and is hinged to another structure. There are two sets of rolling elements, one set being a guide rod rolling element 8, which is installed on the guide rod 3. The top of the sleeve 2 is in contact with the inner wall of the sleeve 2. Another sleeve is a rolling element 10, installed at the bottom of the sleeve 2 and in contact with the outer wall of the guide rod 3. There is a gap between the guide rod 3 and the sleeve 2; they do not directly contact each other. Together with the rolling element, they form a linear rolling pair to reduce friction between the sleeve 2 and the guide rod 3 under wave action. A water blocker 4 is fitted onto the bottom of the sleeve 2 and is tightly connected to the rolling element 10. It has a water blocker 4 chamber, a water passage hole 5, and a vent hole 11. The water passage hole 5 is located at the bottom of the water blocker 4, and the vent hole 11 connects the water blocker 4 chamber with the inner chamber of the sleeve 2. The cross-sectional area of ​​the guide rod 3 is... S 1. The cross-sectional area of ​​the inner cavity of the water blocker 4 is... S 2, S 2 = (20~30) S 1.

[0028] The aforementioned water blocker 4 is a semi-enclosed chamber structure with a water passage hole 5 at the bottom through which seawater enters the water blocker 4. A vent hole 11 is located at the top, connecting the chamber of the water blocker 4 to the inner cavity of the sleeve 2. This oscillating float-type wave energy device utilizes the principle of communicating vessels, ensuring that the seawater level in the gap between the guide rod 3 and the sleeve 2 is flush with the seawater level inside the water blocker 4. Because the cross-sectional area of ​​the water blocker 4 is much larger than that of the guide rod 3, the fluctuation amplitude of the liquid level inside the water blocker 4 caused by the movement of the guide rod 3 within the sleeve 2 is significantly reduced. Furthermore, due to the filling material... With the placement of 9, the effective pressurized volume of the sealed chamber of float 1 is significantly reduced to the volume ratio of water blocker 4. Water blocker 4 can limit the fluctuation range of seawater surface inside water blocker 4 caused by the change of air pressure inside float 1 of oscillating float wave energy device to within water blocker 4. This can prevent seawater from rising to the rolling parts at the bottom of sleeve 2 and also prevent gas inside float 1 from overflowing along sleeve 2 and water blocker 4. Thus, waterproofing of the moving pair of wave energy device and the chamber of float 1 is achieved reliably and at low cost, thereby solving the "four-proof" problem of oscillating float wave energy device.

[0029] The key to solving the waterproofing problem of the oscillating float-type wave energy device in the above technical solution lies in suppressing the fluctuation amplitude of the liquid level inside the water blocker 4. There are two reasons for the fluctuation of the liquid level inside the water blocker 4: first, the movement of the guide rod 3 within the sleeve 2; and second, the change in the draft of the float 1 under the action of waves. The above technical solution of the present invention achieves control over the fluctuation amplitude of the seawater level inside the water blocker 4 and the sleeve 2 under various operating conditions by limiting the ratio of the cross-sectional area of ​​the inner cavity of the water blocker 4 to that of the guide rod 3 and the ratio of the effective pressurized volume of the sealed chamber of the float 1 to the volume of the chamber of the water blocker 4.

[0030] It should be noted that the larger the ratio of the cross-sectional area of ​​the inner cavity of the water blocker 4 to that of the guide rod 3, and the smaller the ratio of the effective pressurized volume of the sealed chamber of the float 1 to the volume of the inner cavity of the water blocker 4, the smaller the range of seawater surface fluctuations within the water blocker 4 (i.e., the range of seawater surface fluctuations within the sleeve 2). However, the economic efficiency will decrease accordingly. Therefore, the limitation on the ratio of the cross-sectional area of ​​the inner cavity of the water blocker 4 to that of the guide rod 3 and the ratio of the effective pressurized volume of the sealed chamber of the float 1 to the volume of the inner cavity of the water blocker 4 should follow the principle of technical economy. That is, under the premise of ensuring that the range of seawater surface fluctuations within the water blocker 4 is limited to within the water blocker 4 under extreme working conditions, the ratio of the cross-sectional area of ​​the inner cavity of the water blocker 4 to that of the guide rod 3 should be as small as possible, and the ratio of the effective pressurized volume of the sealed chamber of the float 1 to the volume of the inner cavity of the water blocker 4 should be as large as possible.

[0031] It should be noted that the above formula limits the ratio of the cross-sectional area of ​​the inner cavity of the water blocker 4 to that of the guide rod 3 to 20-30. Since the relative movement of the guide rod 3 within the sleeve 2 causes changes in the gas volume within the float 1 cavity, and consequently changes in the gas pressure within the float 1 cavity, and because the gap between the guide rod 3 and the sleeve 2 communicates with the inner cavity of the float 1, this causes fluctuations in the seawater surface within the water blocker 4. The larger this ratio, the smaller the fluctuation range of the seawater surface within the water blocker 4, but the economic efficiency decreases accordingly. Therefore, based on the fact that the extreme vibration height of existing oscillating float-type wave energy devices is generally less than 10m, if the height of the water blocker 4 is 1m, then... S 2 and S A ratio of 10 is sufficient, but to ensure safety, and considering that the liquid level inside the water blocker is also affected by the draft of the float, the ratio will be... S 2 and S The safety factor of the ratio is increased to 2-3, that is... S 2 and S The value of the ratio is between 20 and 30.

[0032] In some embodiments, the lower end of the guide rod 3 extends out of the sleeve 2 and is hinged to an anchor or submersible on the seabed.

[0033] In some embodiments, the pre-inflation pressure of the inner cavity of the float 1 is [value missing]. P 预充 , P 预充 The following conditions must be met:

[0034]

[0035] in, ρ The density of the seawater in the area where the oscillating float-type wave energy device is located. g It is the gravitational constant. H The distance from the static draft of buoy 1 to the center height of water blocker 4. L The height of the inner cavity of water blocker 4 H and L The unit is m, and 10.33 in the formula refers to the height of a water column in meters corresponding to one standard atmosphere.

[0036] In the above formula, 10.33 refers to the height of a water column (in meters) corresponding to one standard atmosphere. P 预充 This is an absolute pressure value, therefore a standard atmosphere must be added during calculation; 0.1 L This refers to the decrease in the liquid level inside the water blocker relative to its central position during static draft. L The height of the inner cavity of the water blocker is such that, since the rise of the liquid level inside the water blocker is usually slightly greater than the fall, the pre-charge pressure of the water blocker can be appropriately increased to reduce the height of the liquid level inside the water blocker during static draft.

[0037] In some embodiments, the effective pressurized volume of the buoy 1 is less than [amount missing]. ,in h This represents the increase in the maximum draft of the buoy relative to its static draft, expressed in meters (m).

[0038] It is important to emphasize that one of the key aspects of this invention lies in the calculation of the effective pressurized volume and pre-inflation pressure of the float chamber 1. The specific determination process is as follows:

[0039] The effective pressurized volume of the buoy cavity 1 is calculated based on the gas wave law of Eyre, taking the static draft of the buoy as the initial state, and assuming the cross-sectional area of ​​guide rod 3 is... S 1. The cross-sectional area of ​​the inner cavity of the water blocker 4 is... S 2. Determine the size based on the dimensions of float 1. S 2 = (20~30) S 1, such as Figure 2 As shown, the inner height of the water blocker 4 is L The distance from the static draft of float 1 to the center height of water blocker 4 is H The initial absolute pressure inside the water blocker 4 is:

[0040]

[0041] The initial gas volume inside the water blocker 4 is 0.5. LS 2. Let the effective pressurized volume of the inner cavity of float 1 be x times the initial gas volume of the inner cavity of water blocker 4. Then, the remaining effective pressurized volume after the main compartment is filled is 0.5x. LS 2. The initial total volume of the gas is:

[0042]

[0043] To prevent seawater from rising from the water blocker 4 to the rolling element 10 of the sleeve, and to avoid gas overflowing from the float 1 along the sleeve 2 and the water blocker 4, the fluctuation range of the liquid level inside the water blocker 4 should be controlled within ±0.4 mm. L For safety reasons, we will analyze the state of buoy 1 at its maximum draft, and set it as state 1. We will assume the increase in maximum draft relative to static draft is... h The liquid level in water blocker 4 rose by 0.4 mm. L Then, the absolute pressure and volume of the gas at this time are respectively:

[0044]

[0045] According to Boyle's law,

[0046]

[0047] Substituting the above equations into the solution, we get...

[0048]

[0049] Therefore, after filling material 9 is placed inside the inner cavity of float 1, the remaining effective pressurized volume should be less than [the required volume]. In the formula, the constant 10.33 corresponds to a water column height in meters (m) at one standard atmosphere. The other constants 4, 0.4, 5, and 2 are all derived from the formula. The smaller the remaining effective pressurized volume after the filling material 9 is placed inside the float 1, the smaller the fluctuation amplitude of the liquid level inside the water blocker 4.

[0050] The pre-charge pressure of the float 1 cavity should be calculated based on the state of the gas inside the float 1 cavity during static draft. Since the rise in liquid level inside the water blocker 4 is usually slightly greater than the fall, the pre-charge pressure of the float 1 cavity can be appropriately increased to reduce the height of the liquid level inside the water blocker 4 during static draft, i.e.:

[0051]

[0052] in, ρ The density of the seawater in the area where the oscillating float-type wave energy device is located. g It is the gravitational constant. H The distance from the static draft of buoy 1 to the center height of water blocker 4. L The height of the inner cavity of water blocker 4 H andL The unit is m, and 10.33 in the formula refers to the height of a water column in meters corresponding to one standard atmosphere.

[0053] In some embodiments, the effective pressurized volume of the inner cavity of the float 1 is the remaining space volume after the filler 9 is placed inside the float 1. The filler 9 is placed in the inner cavity of the float 1 to reduce the effective pressurized volume of the inner cavity of the float 1, increase the influence of changes in the liquid level in the water blocker 4 on the air pressure inside the inner cavity of the float 1, thereby reducing the fluctuation amplitude of the liquid level in the water blocker 4 caused by changes in the draft of the float 1.

[0054] In some embodiments, the guide rod rolling element 8 contacts the inner wall of the sleeve 2, and the sleeve rolling element 10 contacts the outer wall of the guide rod 3. The sleeve 2, the guide rod 3, and the two sets of rolling elements constitute a linear rolling pair to reduce the friction between the guide rod 3 and the sleeve 2 under the action of waves.

[0055] In some embodiments, a transmission structure 6 and an energy conversion structure 7 are also included. The transmission structure 6 is connected to the guide rod 3 to convert the wave energy captured by the float 1 into mechanical energy; the energy conversion structure 7 is connected to the transmission structure 6 to convert the mechanical energy into electrical energy.

[0056] This invention is a pressure-waterproof oscillating float-type wave energy device. Through the rational design of the above structure, the water blocker 4 can limit the fluctuation range of seawater surface within the water blocker 4 caused by changes in air pressure inside the float 1 of the wave energy device. This prevents seawater from rising onto the rolling element 10 of the sleeve and also avoids the leakage of gas inside the float along the sleeve 2 and the water blocker 4, thus reliably and cost-effectively solving the "four-proof" problem of the device. Compared with existing technical solutions, this invention has the characteristics of high reliability and high cost performance.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A pressure-waterproof oscillating float-type wave energy device, characterized in that, include: A floating body with a sealed internal cavity; The filler, located in the inner cavity of the float, is a lightweight material whose volume does not change with the air pressure inside the inner cavity of the float; The sleeve is located at the center of the float and is fixedly connected to the float. It is open at both ends, with the upper end located in the inner cavity of the float and the lower end extending from the bottom of the float. The guide rod is fitted inside the casing at the top and extends out of the casing at the bottom and is hinged to the seabed anchor or a submerged body at a fixed depth, with a gap between it and the casing. The rolling element, together with the sleeve and guide rod, forms a linear rolling pair; A water blocker is fitted onto the bottom of a sleeve and fixedly connected to the upper end of the sleeve. It has a water blocker chamber, a water passage hole, and a vent hole. The water passage hole is located at the bottom of the water blocker, and the vent hole is located at the top of the water blocker and connects the water blocker chamber with the inner cavity of the sleeve. The cross-sectional area of ​​the guide rod is S 1. The cross-sectional area of ​​the water blocker is S 2, S 2 = (20~30) S 1; The pre-inflation pressure of the float's internal cavity is P 预充 , P 预充 The following conditions must be met: in, ρ The density of the seawater in the area where the barotropically waterproof oscillating float-type wave energy device is located. g It is the gravitational constant. H The distance from the static draft of the buoy to the center height of the water blocker. L The height of the water blocker's inner cavity is 10.33, which refers to the height of a water column (in meters) corresponding to one standard atmosphere. P 预充 This is the pre-charge pressure, expressed as an absolute pressure value in Pa, and the density is... ρ The unit is kg / m 3 Gravitational constant g The unit is m / s 2 , H and L The unit is m; The effective pressurized volume of the float's internal cavity is less than ,in h This represents the increase in the maximum draft of the floating body relative to its static draft, expressed in meters (m). The effective pressurized volume of the inner cavity of the float is the remaining space volume after the inner cavity of the float is filled with filler.

2. The oscillating float-type wave energy device based on air pressure waterproofing according to claim 1, characterized in that, Rolling components can be divided into guide rod rolling components and sleeve rolling components. The guide rod rolling component is installed at the top of the guide rod and contacts the inner wall of the sleeve, while the sleeve rolling component is installed at the bottom of the sleeve and contacts the outer wall of the guide rod. The guide rod, sleeve, and rolling components together form a linear rolling pair, which enables the float to generate relative motion along the guide rod under the action of waves.

3. The oscillating float-type wave energy device based on air pressure waterproofing according to claim 1, characterized in that, It also includes a transmission structure, which is connected to the guide rod to convert the wave energy captured by the float into mechanical energy.

4. The oscillating float-type wave energy device based on air pressure waterproofing according to claim 1, characterized in that, It also includes an energy conversion structure, which is connected to the transmission structure to convert mechanical energy into electrical energy.

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