High-sensitivity large-stroke air spring mechanism and wave power generation device

Abstract

The high-sensitivity and large-stroke air spring mechanism comprises an air spring body and a pressure storage bin, the air spring body comprises an elastic telescopic part and a sealing plate, the elastic telescopic part comprises a plurality of telescopic units connected in sequence, each telescopic unit comprises a disc-shaped sleeve and an annular edge plate, and the disc-shaped sleeve is connected with the sealing plate. The middle of the side wall of the dish-shaped sleeve is concaved inwards to form a V shape, an inner hole in the middle of the dish-shaped sleeve comprises conical hole sections located on the two end sides and a middle hole section, the dish-shaped sleeve can stretch and deform when subjected to axial force, when the dish-shaped sleeve is in a natural state, the diameter of the maximum diameter position of each conical hole section is D2, the diameter of each middle hole section is D1, and D1 / D2 is smaller than or equal to 1 / 4. Annular edge plates are fixedly arranged at the two ends of the dish-shaped sleeve correspondingly, the annular edge plates of every two adjacent telescopic units are fixedly connected, and sealing plates are connected to the two end sides of the elastic telescopic part correspondingly. And the pressure storage bin is communicated with a spring air cavity in the air spring body through a pipeline.

Description

Technical Field

[0001] This invention relates to air springs, specifically to a highly sensitive, long-stroke air spring mechanism, and a wave power generation device. Background Technology

[0002] An air spring is a sealed container filled with compressed air, utilizing the compressibility of the gas to achieve its elastic effect. Traditional air springs are generally of the airbag or bellows type. Airbag air springs generally cannot provide support force with small pressure variations and large compression strokes under rated pressure, making them unsuitable for applications requiring high sensitivity. Bellows air springs use a bellows structure with telescopic properties. Under high pressure and long compression stroke conditions, if the bellows wall material has high strength, the effective compression stroke will be short. If the wall material has high elasticity, when the air inside the air spring is under high pressure, ordinary bellows will laterally pop out under the action of high-pressure air, especially during rapid compression when lateral volume expansion forces are generated, making the air spring unable to function properly. Therefore, it is difficult to use in high-pressure and rapid compression applications. Therefore, there is an urgent need to design an air spring with high sensitivity, long stroke, and the ability to maintain axial stability under high pressure.

[0003] Wave power generation devices utilize wave energy to generate electricity, employing spring structures for buffering and energy conversion. Patent application CN202110683730.6 discloses a wave power generation device that uses a suspension body and suspension support system housed within a sealed cavity in a casing. The relative motion of the suspension body within the casing is converted into generator motion to generate electricity. The suspension support system is a key factor affecting power generation. Existing designs typically use ordinary compression springs. In wave energy air spring operation, the spring is required to provide a large compression stroke corresponding to the mass change of the suspension support body, meaning it needs higher sensitivity. Ordinary compression springs, when their effective compression stroke is large, are prone to lateral displacement during rapid compression, resulting in poor stability and friction with the guide posts. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a highly sensitive, long-stroke air spring mechanism and a wave power generation device. The air spring body will not pop outward under high inner wall pressure, has good stability, and has the advantages of high sensitivity and long stroke.

[0005] To achieve the above objectives, the present invention provides a high-sensitivity, long-stroke air spring mechanism, comprising an air spring body and a pressure storage chamber. The air spring body includes an elastic telescopic section and a sealing plate. The elastic telescopic section includes multiple telescopic units connected in sequence. Each telescopic unit includes a disc-shaped sleeve and an annular edge plate. The disc-shaped sleeve is hourglass-shaped, with its sidewalls recessed inward in a V-shape. The inner hole in the middle of the disc-shaped sleeve includes tapered sections at both ends and a middle section connecting two tapered sections. The disc-shaped sleeve is made of an elastic material and, when subjected to axial... The disc sleeve is capable of stretching and deforming under force. In its natural state, the diameter of the maximum diameter of the conical hole section is D2, and the diameter of the middle hole section is D1. D1 / D2 is less than or equal to 1 / 4. Both ends of the disc sleeve are respectively fixed with annular edge plates. The annular edge plates of two adjacent telescopic units in the elastic telescopic part are fixedly connected and the connection is sealed. Both ends of the elastic telescopic part are connected with sealing plates, forming a sealed spring air cavity inside the elastic telescopic part. The pressure storage chamber is connected to the spring air cavity inside the air spring body through a pipeline.

[0006] Furthermore, the cross section of the disc-shaped sleeve that passes through the midpoint of the axial direction and is perpendicular to the axial direction is its intermediate cross section, and the disc-shaped sleeve is symmetrical about the intermediate cross section.

[0007] Furthermore, the disc-shaped sleeve is made of rubber or silicone.

[0008] Furthermore, the disc-shaped sleeve and the annular edge plate are integrated into one piece.

[0009] Furthermore, the annular edge plates of two adjacent telescopic units in the elastic telescopic part are connected by bolts and nuts. The annular edge plates are provided with multiple connecting through holes. The bolts pass through the connecting through holes of two annular edge plates, and the nuts are pressed on one annular edge plate. The nuts are screwed onto the bolts and pressed on the other annular edge plate.

[0010] Furthermore, an annular metal pressure plate is provided between the nut of the bolt and the annular edge plate, and an annular metal pressure plate is provided between the nut and the annular edge plate.

[0011] Furthermore, a stabilizing ring is provided between the annular edge plates of two adjacent telescopic units in the elastic telescopic part, and an annular mounting groove is provided on the annular edge plate, with the stabilizing ring being embedded in the annular mounting groove of the two annular edge plates.

[0012] Furthermore, the telescopic unit has a first positioning structure and a second positioning structure respectively provided on the annular edge plate at both ends. When the annular edge plates of two adjacent telescopic units are connected, the first positioning structure and the second positioning structure are connected in cooperation.

[0013] Furthermore, in the first positioning structure and the second positioning structure, one is an annular positioning groove and the other is an annular positioning protrusion. Both the annular positioning groove and the annular positioning protrusion are coaxially arranged with the annular edge plate. When the annular edge plates of two adjacent telescopic units are connected, the annular positioning protrusion is inserted into the annular positioning groove.

[0014] The present invention also provides a wave power generation device, comprising: a housing having a closed working cavity inside; a suspension body disposed in the working cavity of the housing and capable of relative vertical movement within the working cavity; an output unit including a generator and an output transmission mechanism, wherein the transmission mechanism is located in the working cavity and connected to both the suspension body and the generator, and the output transmission mechanism is used to convert the vertical movement of the suspension body into the movement of the generator; and a spring suspension system disposed within the housing, wherein the spring suspension system includes the aforementioned air spring mechanism, the lower end of the air spring body being fixedly connected to the housing and the upper end being fixedly connected to the suspension body.

[0015] As described above, the air spring mechanism and wave power generation device of the present invention have the following beneficial effects:

[0016] 1. The side of the air spring body is designed with a disc-shaped deep groove structure, which can effectively prevent the outer side from bulging when the internal air pressure is too high, thus maintaining stability during operation. At the same time, compared with the traditional bellows structure, the deep groove air spring body 1 increases the amount of extension and contraction under the premise of the same compression variable angle, thereby significantly amplifying the compression stroke of the air spring body.

[0017] 2. The deep groove air spring body can effectively reduce the working volume of the spring air cavity inside the air spring body. The total sealed gas space formed by the spring air cavity and the pressure storage chamber has a large volume. The ratio of the volume change of the spring air cavity to the volume of the total sealed gas space when the air spring body is at the equilibrium point is the air spring body sensitivity coefficient. Therefore, the larger the ratio of the pressure storage chamber volume to the spring air cavity volume, the higher the sensitivity of the air spring body, thus significantly increasing the compression stroke of the air spring body under the premise of small changes in total volume pressure.

[0018] 3. The wave power generation device uses an air spring mechanism as a spring suspension system. The air spring body provides a large compression stroke variable for the movement of the suspended body. The air spring body has the advantages of high sensitivity, high compression stroke and axial stability, which can effectively increase the response stroke when the suspended body vibrates, improve the wave energy capture efficiency and improve the power generation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the air spring mechanism in this invention.

[0020] Figure 2 This is a schematic diagram of the air spring body in this invention.

[0021] Figure 3 This is a schematic diagram of the disc-shaped sleeve in this invention.

[0022] Figure 4 This is a half-sectional view of the disc-shaped sleeve in this invention.

[0023] Figure 5 This is a top view of the disc-shaped sleeve in this invention.

[0024] Figure 6 This is a schematic diagram showing the combined arrangement of multiple air spring bodies in this invention.

[0025] Figure 7 This is a schematic diagram of the wave power generation device in this invention.

[0026] Explanation of icon numbers

[0027] 1. Air spring body

[0028] 2. Elastic telescopic part

[0029] 21 Telescopic Unit

[0030] 211 Disc-shaped sleeve

[0031] 212 Annular edge plate

[0032] 213 Connecting through hole

[0033] 214 Annular positioning groove

[0034] 215 Circular positioning protrusion

[0035] 216 Conical hole segment

[0036] 217 Intermediate Hole Section

[0037] 218 Annular mounting groove

[0038] 22 bolts

[0039] 23 Nuts

[0040] 24 Ring-shaped metal pressure plate

[0041] 25 Stable Rings

[0042] 3. Sealing plate

[0043] 4. Spring-air chamber

[0044] 5. Pressure Storage Tank

[0045] 6. Shell

[0046] 7. Suspension Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0048] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0049] See Figures 1 to 5 This invention provides a high-sensitivity, long-stroke air spring mechanism, including an air spring body 1 and a pressure storage chamber 5. The air spring body 1 includes an elastic telescopic part 2 and a sealing plate 3. The elastic telescopic part 2 includes multiple telescopic units 21 connected in sequence. Each telescopic unit 21 includes a disc-shaped sleeve 211 and an annular edge plate 212. The disc-shaped sleeve 211 is hourglass-shaped, with its sidewalls recessed inward in a V-shape. The inner hole in the middle of the disc-shaped sleeve 211 includes tapered hole sections 216 located at both ends and a middle hole section 217 connecting two tapered hole sections 216. The disc-shaped sleeve 211 is made of an elastic material and can expand and contract when subjected to axial force. In the natural state (without gravity or other external forces), the diameter of the maximum diameter of the conical hole section 216 of the disc sleeve 211 is D2, and the diameter of the middle hole section 217 is D1. D1 / D2 is less than or equal to 1 / 4. Both ends of the disc sleeve 211 are respectively fixed with annular edge plates 212. The annular edge plates 212 of two adjacent telescopic units 21 in the elastic telescopic part 2 are fixedly connected and the connection is sealed. Both ends of the elastic telescopic part 2 are connected with sealing plates 3, and a sealed spring air cavity 4 is formed inside the elastic telescopic part 2. The pressure storage chamber 5 is connected to the spring air cavity 4 in the air spring body 1 through a pipeline.

[0050] The main working principle of the air spring mechanism involved in this invention is as follows:

[0051] The air chamber 4 inside the air spring body 1, together with the interior of the pressure storage chamber 5, forms a total sealed gas space. Inside the air spring body 1, the conical orifice 216 of each telescopic unit 21 constitutes the main air storage space, and the intermediate orifice 217 is used for airflow between the air storage spaces. When the air spring body 1 is subjected to axial pressure, it will be compressed, its internal pressure will increase, and each telescopic unit 21 will be compressed a certain distance, that is, the included angle θ between the upper and lower side plates of the V-shaped sidewall of the telescopic unit 21 will decrease, see [reference]. Figure 4 During compression, due to the constraint of the annular edge plate 212, the maximum outer diameter of the disc sleeve 211 remains basically unchanged (i.e., D2 remains basically unchanged), while the diameter D1 of the intermediate hole section 217 changes. When the air spring body 1 is deeply compressed, its internal pressure increases, and the sidewall of the air spring body 1 experiences increased outward pressure. Since the ratio of the diameter D1 of the intermediate hole section 217 in the telescopic unit 21 to the diameter D2 at the maximum diameter of the tapered hole section 216 is less than or equal to 1 / 4, the telescopic unit 21 is recessed inward to form a deep groove structure. When compressed, it can provide an inward counterforce to prevent the telescopic unit 21 from jumping outward when the internal air pressure is too high. This effectively maintains the stable positioning and balance of the air spring body 1 during operation. D2 and D1 form a change in diameter. When the air spring body 1 is working, the smaller diameter of D1 exerts a pulling force on the larger diameter of D2 towards the central axis, which can overcome the outward expansion force of the air spring, thus maintaining the stability of axial extension and contraction during the operation of the air spring. The smaller the diameter D1, the higher the axial stability of the air spring body 1 during compression. However, the intermediate hole section 217 is used for the transmission of compressed air during the extension and contraction process of the air spring body 1. Therefore, the minimum cross-sectional area of ​​the intermediate hole section 217 can be set according to the working conditions to prevent pressure from being generated when the compressed air of the air spring body 1 flows through it. Furthermore, since the included angle θ between the upper and lower side plates of the V-shaped sidewall of the telescopic unit 21 is relatively small, compared with the traditional bellows structure, under the premise of the same compression variable angle (which is the range of change of included angle θ in this application), the axial extension and contraction of the telescopic unit 21 is increased, thereby enabling a proportionally large amplification of the compression stroke of the air spring body 1.

[0052] Meanwhile, the deep groove structure of the air spring body 1 can significantly reduce the internal working volume, while the total sealed gas space formed by the spring air cavity 4 inside the air spring body 1 and the pressure storage chamber 5 has a large volume. The volume of the pressure storage chamber 5 is set to N times the volume of the spring air cavity 4 inside the air spring body 1, and N is set according to the required compression sensitivity of the air spring body 1. In use, the upper end of the air spring body 1 supports a heavy object. The air pressure is adjusted so that the supported heavy object is at the predetermined stroke point. At this time, the weight of the supported heavy object is balanced with the elastic support force of the air spring body 1. When the pressure of the supported heavy object on the air spring body 1 changes under the action of external force, the air spring body 1 is compressed or stretched, and the volume of the spring air cavity 4 decreases or increases accordingly. Some air enters the pressure storage chamber 5 or is replenished from the pressure storage chamber 5 to the spring air cavity 4, and the pressure of the pressure storage chamber 5 decreases or increases accordingly. The ratio of the change in volume of the spring air cavity 4 to the volume of the total sealed gas space when the air spring body 1 is at the equilibrium point is recorded as the sensitivity coefficient of the air spring body 1. Therefore, the larger the ratio of the volume of the pressure storage chamber 5 to the volume of the spring air cavity 4, the higher the sensitivity of the air spring body 1. By setting the pressure storage chamber 5 to work with the air spring body 1, the sensitivity of the air spring body 1 can be greatly improved. By setting a fixed ratio between the volume of the pressure storage chamber 5 and the volume of the spring air cavity 4 of the air spring body 1, the single compression stroke of the air spring body 1 under the preset pressure can be determined, thereby determining the working stroke range of the air spring body 1.

[0053] See Figures 1 to 5 The air spring mechanism of the present invention will be further described below with reference to a specific embodiment:

[0054] In this embodiment, see Figure 3 , Figure 4 and Figure 5 As a preferred design, the section passing through the midpoint of the axial direction and perpendicular to the axial direction of the disc sleeve 211 is its intermediate cross-section. The disc sleeve 211 is symmetrical about the intermediate cross-section, and the upper and lower parts of the disc sleeve 211 at the intermediate cross-section are both conical. The wall thickness d of the disc sleeve 211 is set as needed, and the wall thickness d depends on the designed support elasticity to ensure that the disc sleeve 211 can be well compressed and to ensure sufficient structural strength, avoiding outward deformation under internal pressure.

[0055] In this embodiment, see Figure 3 , Figure 4 and Figure 5 As a preferred design, the disc-shaped sleeve 211 is made of rubber or silicone, which has excellent elastic deformation properties and wear resistance. The disc-shaped sleeve 211 and the annular edge plate 212 are integrally formed, made of the same material, and manufactured as a single piece. In other embodiments, the annular edge plate 212 can also be made of other tensile-resistant materials and fixedly connected to the disc-shaped sleeve 211.

[0056] In this embodiment, see Figure 2 , Figure 4 and Figure 5 As a preferred design, the annular edge plates 212 of two adjacent telescopic units 21 in the elastic telescopic part 2 are connected by bolts 22 and nuts 23. Multiple connecting through holes 213 are opened on the annular edge plate 212 and are evenly distributed along the circumference. There are also multiple bolts 22 and nuts 23. The bolts 22 pass through the connecting through holes 213 of the two annular edge plates 212, and the nuts 23 are pressed on one annular edge plate 212. The nuts 23 are screwed on the bolts 22 and pressed on the other annular edge plate 212, thereby fixing the two annular edge plates 212 together. The connection is stable and reliable, and it is convenient to disassemble and assemble. Furthermore, an annular metal pressure plate 24 is provided between the nut of bolt 22 and the annular edge plate 212, and an annular metal pressure plate 24 is provided between the nut 23 and the annular edge plate 212. The two annular metal pressure plates 24 clamp the two annular edge plates 212, resulting in more even force distribution and improved uniformity and stability of the contact pressure between the two annular edge plates 212, thereby improving sealing. Simultaneously, the annular metal pressure plate 24 also stabilizes the radial outward expansion of the annular edge plates 212, thus preventing radial outward deformation of the air spring body 1. A sealing ring can be provided between the annular edge plates 212 of two adjacent telescopic units 21 to improve sealing. The two sealing plates 3 are also fixedly connected to the elastic telescopic part 2 by bolts 22 and nuts 23.

[0057] In this embodiment, see Figure 2 , Figure 3 and Figure 4 As a preferred design, a stabilizing ring 25 is provided between the annular edge plates 212 of two adjacent telescopic units 21 in the elastic telescopic part 2. The annular edge plates 212 have coaxially arranged annular mounting grooves 218. The stabilizing ring 25 is embedded in the annular mounting grooves 218 of the two annular edge plates 212, with the stabilizing ring 25 located near the inner edge of the annular edge plates 212. The stabilizing ring 25 is made of metal or other materials that are difficult to deform. When the two silicone annular edge plates 212 are clamped and fixedly connected by two annular metal pressure plates 24, the annular edge plates 212 are compressed, which in turn compresses the stabilizing ring 25. The stabilizing ring 25 can press against the outer edge of the silicone, reducing the outward deformation of the annular edge plates 212 and making the connection between the two annular edge plates 212 more stable and reliable.

[0058] In this embodiment, see Figure 2 , Figure 3 and Figure 4As a preferred design, the first positioning structure and the second positioning structure each have an annular positioning groove 214 and an annular positioning protrusion 215, respectively. Both the annular positioning groove 214 and the annular positioning protrusion 215 are coaxially arranged with the annular edge plate 212. When the annular edge plates 212 of two adjacent telescopic units 21 are connected, the annular positioning protrusion 215 is inserted into the annular positioning groove 214, thereby facilitating positioning during connection. Similarly, the inner surfaces of the two sealing plates 3 are also provided with annular grooves and annular protrusions, respectively, for positioning when connected to the annular edge plates 212 at both ends of the elastic telescopic part 2.

[0059] See Figure 4 As a preferred design, the air spring body 1 in the air spring mechanism can be set to multiple units, which are arranged and combined according to a certain rule to form a spring array. The spring air cavity 4 in each air spring body 1 is connected to a pressure storage chamber 5, or they can be connected to different pressure storage chambers 5 respectively.

[0060] In this embodiment, as a preferred design, the pressure storage chamber 5 is also equipped with a pressure-controlled air pump. When the pressure inside the air spring body 1 is insufficient, the air pump can automatically increase the pressure inside the pressure storage chamber 5 and the air spring body 1 until the predetermined pressure is reached.

[0061] See Figure 5 This invention provides a wave power generation device, comprising: a housing 6, which has a closed working cavity inside; a suspension body 7, disposed in the working cavity of the housing 6 and capable of relative vertical movement within the working cavity; an output section (not shown in the drawings), including a generator and an output transmission mechanism, the transmission mechanism being located in the working cavity and connected to both the suspension body 7 and the generator, the output transmission mechanism being used to convert the vertical movement of the suspension body 7 into generator movement; and a spring suspension system disposed within the housing 6, the spring suspension system including the aforementioned air spring mechanism, the lower end of the air spring body 1 being fixedly connected to the housing 6, and the upper end being fixedly connected to the suspension body 7. The pressure storage chamber 5 may be disposed at the bottom of the working cavity of the housing 6 or at other locations.

[0062] The wave power generation device of this invention employs an anti-oscillation method, using the shell 6 as the oscillating body. Under the influence of seawater, it oscillates to capture wave energy and generates electricity using the kinetic energy of the suspended body 7 during relative oscillation. In wave power generation, the air spring body 1 is required to provide a large compression stroke variable corresponding to the movement of the suspended body 7. The spring suspension system constructed using the air spring mechanism of this invention has the advantages of high sensitivity and large compression stroke, effectively increasing the response stroke of the suspended body 7 during vibration, thereby improving wave energy capture efficiency and power generation efficiency. The entire wave power generation device can float on the water surface without anchoring to the seabed, saving significant anchoring and installation costs. Since the working cavity of the shell 6 is closed, and the suspended body 7 and spring suspension system are all located within the working cavity, they do not come into contact with the water outside the shell 6. This prevents corrosion of the components within the working cavity by water, extending the service life of the entire device and solving the operational instability and safety issues caused by mechanical structures contacting seawater.

[0063] In the wave power generation device of the present invention, the transmission unit is installed on the housing 6, and the generator is fixed to the housing 6. The generator can be fixedly installed on the housing 6 and can move up and down with the housing 6. The housing 6, the suspension body 7, and the output unit can all adopt existing designs, which will not be described in detail here. Other existing working parts can also be configured.

[0064] As can be seen from the above, the air spring mechanism and wave power generation device of the present invention have the following beneficial effects:

[0065] 1. The side of the air spring body 1 is designed with a butterfly-shaped deep groove structure, which can effectively prevent the outer side from jumping out when the internal air pressure is too high, thus maintaining stability during operation. At the same time, compared with the traditional bellows structure, the deep groove air spring body 1 increases the amount of extension and contraction under the premise of the same compression variable angle, thus greatly amplifying the compression stroke of the air spring body 1.

[0066] 2. The deep-groove air spring body 1 can effectively reduce the working volume of the spring air cavity 4 inside the air spring body 1. Reducing the air spring body 1 can correspondingly reduce the volume of the pressure storage chamber. The total sealed gas space formed by the spring air cavity 4 and the pressure storage chamber 5 has a large volume. The ratio of the volume change of the spring air cavity 4 to the volume of the total sealed gas space when the air spring body 1 is at the equilibrium point is the sensitivity coefficient of the air spring body 1. Therefore, the larger the ratio of the volume of the pressure storage chamber 5 to the volume of the spring air cavity 4, the higher the sensitivity of the air spring body 1, thereby significantly increasing the compression stroke of the air spring body 1 under the premise of small changes in total volume pressure.

[0067] 3. The wave power generation device uses an air spring mechanism as a spring suspension system. The air spring body 1 provides a large compression stroke variable for the movement of the suspension body 7. The air spring body 1 has the advantages of high sensitivity, high compression stroke and axial stability, which can effectively increase the response stroke of the suspension body 7 when it vibrates, improve the wave energy capture efficiency and improve the power generation efficiency.

[0068] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0069] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A high sensitivity large stroke air spring mechanism characterized by: The air spring body (1) comprises an elastic telescopic part (2) and a sealing plate (3), the elastic telescopic part (2) comprises a plurality of telescopic units (21) connected in sequence, the telescopic unit (21) comprises a dished sleeve (211) and an annular edge plate (212), the dished sleeve (211) is hourglass-shaped, the middle of the side wall is inwardly recessed into a V shape, the inner hole in the middle of the dished sleeve (211) comprises a tapered hole section (216) at both ends and a middle hole section (217) connecting the two tapered hole sections (216), the dished sleeve (211) is made of elastic material and can be elastically deformed when subjected to axial force, the diameter of the tapered hole section (216) at the maximum diameter is D2, and the diameter of the middle hole section (217) is D1, D1 / D2 is less than or equal to 1 / 4, both ends of the dished sleeve (211) are respectively fixedly provided with the annular edge plate (212), the annular edge plates (212) of adjacent two telescopic units (21) in the elastic telescopic part (2) are fixedly connected, and the connection is sealed, both ends of the elastic telescopic part (2) are connected with the sealing plate (3), and a closed spring air cavity (4) is formed in the elastic telescopic part (2); the pressure storage bin (5) is connected in communication with the spring air cavity (4) in the air spring body (1) through a pipeline.

2. The air spring mechanism of claim 1, wherein: The cross section of the dished sleeve (211) perpendicular to the axial direction at the middle point of the axial direction is a middle cross section, and the dished sleeve (211) is symmetrical about the middle cross section.

3. The air spring mechanism of claim 1, wherein: The material of the dished sleeve (211) is rubber or silicone.

4. The air spring mechanism of claim 1 or 3, wherein: The dished sleeve (211) and the annular edge plate (212) are integrated.

5. The air spring mechanism of claim 1 or 3, wherein: The annular edge plates (212) of adjacent two telescopic units (21) in the elastic telescopic part (2) are connected by bolts (22) and nuts (23), a plurality of connecting through holes (213) are formed in the annular edge plates (212), the bolts (22) pass through the connecting through holes (213) of the two annular edge plates (212), and the nuts (23) are tightly pressed on one annular edge plate (212), the nuts (23) are screwed on the bolts (22) and tightly pressed on the other annular edge plate (212).

6. The air spring mechanism of claim 5, wherein: Annular metal pressing plates (24) are arranged between the nuts (23) and the annular edge plates (212).

7. The air spring mechanism of claim 5, wherein: Stable rings (25) are arranged between the annular edge plates (212) of adjacent two telescopic units (21) in the elastic telescopic part (2), the annular edge plates (212) are provided with coaxially arranged annular mounting grooves (218), and the stable rings (25) are embedded in the annular mounting grooves (218) of the two annular edge plates (212).

8. The air spring mechanism of claim 1, wherein: The first positioning structure and the second positioning structure are coaxially arranged on the annular edge plate (212), and the annular positioning protrusion (215) is inserted into the annular positioning groove (214) when the annular edge plates (212) of the two adjacent telescopic units (21) are connected.

9. The air spring mechanism of claim 8, wherein: The first positioning structure and the second positioning structure are coaxially arranged on the annular edge plate (212), and the annular positioning protrusion (215) is inserted into the annular positioning groove (214) when the annular edge plates (212) of the two adjacent telescopic units (21) are connected.

10. A wave power device, characterized in that Comprise: The shell (6) is internally provided with a closed working inner cavity; The suspension body (7) is arranged in the working inner cavity of the shell (6) and can move up and down relative to the working inner cavity; The output part includes a generator and an output transmission mechanism, the transmission mechanism is partially located in the working inner cavity, and is connected with the suspension body (7) and the generator, and the output transmission mechanism is used for converting the up-down movement of the suspension body (7) into the movement of the generator; The spring suspension system is arranged in the shell (6), and the spring suspension system comprises the air spring mechanism according to any one of claims 1 to 9, the lower end of the air spring body (1) is fixedly connected with the shell (6), and the upper end is fixedly connected with the suspension body (7).

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