Heat dissipation, fixing and sealing device and system for deep sea Stirling generator

Abstract

The utility model relates to the technical field of ocean bionic engineering, and discloses a deep sea Stirling generator heat dissipation, fixing and sealing device which comprises a Stirling generator, a two-petal heat dissipation supporting frame, a pressure-resistant tank body, an annular connecting piece and a pressure-resistant tank cover. The Stirling generator and the two heat dissipation supporting frames are restrained through bolts in the axial direction and the radial direction respectively, the outer wall face and the upper surface of the annular connecting piece are connected with the heat dissipation supporting frames and the pressure-resistant tank cover through bolts respectively, and the Stirling generator, the two heat dissipation supporting frames and the annular connecting piece are all placed in the pressure-resistant tank body. Internal normal pressure is guaranteed by the pressure-resistant tank cover, the pressure-resistant tank body and a sealing structure between the pressure-resistant tank cover and the pressure-resistant tank body According to the utility model, the heat dissipation support frame fixes the Stirling generator in a two-section symmetrical structural form, so that the processing difficulty of parts is reduced, and the assembly flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of marine bionic engineering, in particular to a heat dissipation, fixing and sealing device and system for a deep-sea Stirling generator. Background Technique

[0002] A Stirling generator is a heat engine that uses the temperature difference between an external heat source and a cold source for energy conversion. Due to its advantages such as high efficiency, fuel diversity, and environmental friendliness, it has important application prospects in some specific fields such as ship power, space exploration, and waste heat recovery.

[0003] With the increasing exploration and development of deep-sea resources by humans, the energy supply and utilization in the deep-sea high-pressure environment have become technical problems to be solved urgently. The Stirling generator is considered an ideal choice for deep-sea energy supply due to its high efficiency, low noise, and diverse heat source applicability. However, currently, using a Stirling generator in the deep-sea environment faces many challenges, especially in heat dissipation, fixing, and pressure-resistant sealing:

[0004] 1. The efficient operation of the Stirling generator completely depends on the temperature difference. When the heat source is stable, the heat dissipation at the cold end becomes particularly important. Although the low-temperature environment in the deep sea helps with heat dissipation, the high-pressure environment in the deep sea makes the design of the heat dissipation device complex.

[0005] 2. As introduced above, for the Stirling generator to operate stably in the deep-sea high-pressure environment, a pressure-resistant and sealed structure is required. However, in a completely sealed device, the heat dissipation of the Stirling generator will be greatly restricted, which further reduces the working efficiency of the Stirling generator. Therefore, while ensuring good pressure resistance and sealing conditions, solving the heat dissipation problem of the Stirling generator has become a major challenge.

[0006] 3. For the Stirling generator to work in the deep-sea high-pressure environment, it needs to be installed as a whole in a pressure-resistant tank. Due to the special heat dissipation and fixing devices of the Stirling generator, it is very difficult to process an integrated pressure-resistant tank with a fixing structure. Therefore, it is necessary to design a device that takes into account the heat dissipation, fixing, and sealing of the Stirling generator. Content of the Utility Model

[0007] The purpose of the utility model is to solve the technical problems raised in the above background technique.

[0008] The utility model adopts the following technical solution: a heat dissipation, fixing and sealing device for a deep-sea Stirling generator, which comprises a Stirling generator, two split heat dissipation support frames, a pressure-resistant tank body, an annular connecting piece and a pressure-resistant tank cover. The Stirling generator and the two split heat dissipation support frames are respectively constrained by bolts axially and radially. The outer wall surface and the upper surface of the annular connecting piece are respectively connected with the heat dissipation support frame and the pressure-resistant tank cover by bolts. The Stirling generator, the two split heat dissipation support frames and the annular connecting piece are all placed inside the pressure-resistant tank body, and the internal normal pressure is ensured by the pressure-resistant tank cover, the pressure-resistant tank body and the sealing structure therebetween.

[0009] As a preferred technical solution, the heat transfer and installation structure of the Stirling generator mainly comprises a heat source, a heat conduction block, an arc-shaped pressing plate and a fixing plate, wherein:

[0010] The heat source is an electric heating tube simulation heat source or an isotope heat source, and is located at the tail of the Stirling generator;

[0011] Two heat conduction blocks are symmetrically installed, which can conduct the heat inside the Stirling generator to the outer surface. The arc-shaped pressing plate is closely attached to the inner surface of the heat conduction block, and the heat conduction block and the heat dissipation support frame are pressed tightly by bolts;

[0012] Two fixing plates are symmetrically installed, and are located above the heat conduction blocks. The two sides of the fixing plates are respectively connected with the Stirling generator and the heat dissipation support plate by bolts.

[0013] As a preferred technical solution, the heat dissipation support frame is arc-shaped, and comprises an upper convex platform, a lower convex platform, an axial fixing convex platform, heat dissipation fins (24) and counterbore holes, wherein:

[0014] The upper convex platform is located on the inner surface of the heat dissipation support frame. The counterbore holes of the upper convex platform penetrate through the heat dissipation support frame and the upper convex platform from the outer surface of the heat dissipation support frame;

[0015] The lower convex platform is located on the inner surface of the heat dissipation support frame. The counterbore holes of the lower convex platform penetrate through the heat dissipation support frame and the lower convex platform from the outer surface of the heat dissipation support frame; the heat conduction blocks of the Stirling generator are placed between the lower convex platform and the upper convex platform;

[0016] The axial fixing convex platform is located on the inner surface of the heat dissipation support frame and above the upper convex platform. The surface of the axial fixing convex platform is provided with uniformly distributed waist-shaped holes for connecting with the fixing plate of the Stirling generator;

[0017] The heat dissipation fins are circumferentially and uniformly distributed on the outer surface of the heat dissipation support frame and are arranged vertically along the axis, and are used for transferring the heat from the heat conduction blocks to the pressure-resistant tank body;

[0018] The counterbore holes are located at the end of the heat dissipation support frame and there are two rows, and are used for connecting the heat dissipation support frame and the annular connecting piece.

[0019] As a preferred technical solution, the pressure-resistant tank body is made of titanium alloy material, and a groove is axially formed on its inner wall surface. The heat dissipation fins on the outer surface of the heat dissipation support frame are in transitional fit with the groove and can slide along the groove under the push of an external force.

[0020] As a preferred technical solution, two rows of threaded holes are formed on the wall surface of the annular connecting piece for fixedly connecting with the counterbore holes of the heat dissipation support frame; a through hole is formed on the upper surface of the annular connecting piece for fixedly connecting with the pressure-resistant tank cover.

[0021] As a preferred technical solution, the pressure-resistant tank cover is made of titanium alloy material, and a sealing groove is formed along its lower edge, and non-through threaded holes and through threaded holes are formed on its lower surface. The sealing ring inside the sealing groove can ensure the sealing performance between the pressure-resistant tank body and the pressure-resistant tank cover under high-pressure environment. The non-through threaded hole is used to fix the annular connecting piece, and the through threaded hole can be installed with a watertight connector for the input and output of the voltage of the Stirling generator.

[0022] The present invention also provides an installation step of the heat dissipation, fixing and sealing device for the deep-sea Stirling generator:

[0023] S1. The heat conduction blocks on both sides of the Stirling generator are placed between the upper convex platform and the lower convex platform of the heat dissipation support frame. Bolts are respectively passed through the counterbore holes of the upper convex platform and the counterbore holes of the lower convex platform and tightened with the arc-shaped pressing plate of the Stirling generator, so that the heat conduction blocks are tightly attached to the inner surface of the heat dissipation support frame;

[0024] S2. The fixing plate on the Stirling generator is attached to the axial fixing convex platform on the heat dissipation support frame, and the two are fastened by bolts;

[0025] S3. The outer wall surface of the annular connecting piece is attached to the inner surface of the heat dissipation support frame, and the two are fastened by bolts passing through the counterbore holes. The upper surface of the annular connecting piece is attached to the lower surface of the pressure-resistant tank cover, and the two are fixed by bolts passing through the through holes;

[0026] S4. The fixedly connected Stirling generator, heat dissipation support frame, annular connecting piece and pressure-resistant end cover as a whole are pushed into the pressure-resistant tank body along the groove on the inner wall of the pressure-resistant tank body, and the bolts between the pressure-resistant tank body and the pressure-resistant end cover are tightened to complete the fixing and sealing steps of the Stirling generator.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0028] 1. High heat dissipation efficiency: In the present invention, after the Stirling generator is attached to the heat dissipation support frame, the heat is conducted out through the heat dissipation fins on the outer surface of the heat dissipation support frame. This heat dissipation method improves the heat dissipation efficiency to a great extent while reducing the assembly difficulty.

[0029] 2. Flexible assembly: In the present utility model, the heat dissipation support frame fixes the Stirling generator in a symmetrical structure of two petals. This structural form reduces the processing difficulty of parts and improves the flexibility of assembly.

[0030] 3. Strong replaceability: In the present utility model, the heat dissipation support frame and the Stirling generator are first fixed by bolt limit, and then the whole is fitted and installed into the pressure-resistant tank body. Therefore, when there are structural problems, only the heat dissipation support frame needs to be improved or replaced without affecting the pressure resistance and sealing performance of the whole device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a three-dimensional sectional view of a heat dissipation, fixing and sealing device for a deep-sea Stirling generator proposed by the present utility model;

[0032] Figure 2 FIG. is a three-dimensional structural view of a heat dissipation, fixing and sealing device for a deep-sea Stirling generator proposed by the present utility model;

[0033] Figure 3 FIG. is a three-dimensional structural view of a Stirling generator in a heat dissipation, fixing and sealing device for a deep-sea Stirling generator proposed by the present utility model;

[0034] Figure 4 FIG. is a three-dimensional structural view of the outer surface and inner surface of a heat dissipation support frame in a heat dissipation, fixing and sealing device for a deep-sea Stirling generator proposed by the present utility model;

[0035] Figure 5 FIG. is a three-dimensional structural view of a pressure-resistant tank body in a heat dissipation, fixing and sealing device for a deep-sea Stirling generator proposed by the present utility model;

[0036] Figure 6 FIG. is a three-dimensional structural view of an annular connecting piece and a pressure-resistant tank cover in a heat dissipation, fixing and sealing device for a deep-sea Stirling generator proposed by the present utility model;

[0037] LEGEND DESCRIPTION:

[0038] 1. Stirling generator; 10. Heat source; 11. Heat conducting block; 12. Arc-shaped pressing plate; 13. Fixing plate; 2. Heat dissipation support frame; 21. Upper convex platform; 210. Upper convex platform counterbore; 22. Lower convex platform; 220. Lower convex platform counterbore; 23. Axial fixing convex platform; 230. Waist-shaped hole; 24. Heat dissipation fin; 25. Counterbore; 3. Pressure-resistant tank body; 30. Groove; 4. Annular connecting piece; 40. Threaded hole; 41. Through hole; 5. Pressure-resistant tank cover; 50. Sealing groove; 51. Non-through threaded hole; 52. Through threaded hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the term "comprising" or "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments.

[0041] Combined Figures 1-6 As shown, a heat dissipation, fixing and sealing device for a deep-sea Stirling generator provided by the present utility model includes a Stirling generator 1, two-piece heat dissipation support frames 2, a pressure-resistant tank body 3, an annular connecting member 4 and a pressure-resistant tank cover 5. The Stirling generator 1 and the two-piece heat dissipation support frames 2 are respectively constrained by bolts axially and radially. The outer wall surface and the upper surface of the annular connecting member 4 are respectively connected to the heat dissipation support frame 2 and the pressure-resistant tank cover 5 by bolts. The Stirling generator 1, the two-piece heat dissipation support frames 2 and the annular connecting member 4 are all placed inside the pressure-resistant tank body 3, and the internal normal pressure is ensured by the pressure-resistant tank cover 5, the pressure-resistant tank body 3 and the sealing structure therebetween. The heat transfer and installation structure of the Stirling generator 1 mainly includes a heat source 10, a heat conducting block 11, an arc-shaped pressing plate 12 and a fixing plate 13, where: the heat source 10 is an electric heating tube simulation heat source or an isotope heat source and is located at the tail of the Stirling generator 1; two heat conducting blocks 11 are symmetrically installed and can conduct the heat inside the Stirling generator 1 to the outer surface. The arc-shaped pressing plate 12 is closely attached to the inner surface of the heat conducting block 11, and the heat conducting block 11 is pressed against the heat dissipation support frame 2 by bolts; two fixing plates 13 are symmetrically installed and are located above the heat conducting block 11. Both sides of the fixing plate 13 are respectively connected to the Stirling generator 1 and the heat dissipation support plate 2 by bolts.

[0042] Combined Figures 1-6As shown, the heat dissipation support frame 2 is arc-shaped and includes an upper boss 21, a lower boss 22, an axial fixing boss 23, heat dissipation fins 24 and countersunk holes 25, where: The upper boss 21 is located on the inner surface of the heat dissipation support frame 2, and the upper boss countersunk hole 210 penetrates the heat dissipation support frame 2 and the upper boss 21 from the outer surface of the heat dissipation support frame 2; The lower boss 22 is located on the inner surface of the heat dissipation support frame 2, and the lower boss countersunk hole 220 penetrates the heat dissipation support frame 2 and the lower boss 21 from the outer surface of the heat dissipation support frame 2; Between the lower boss 22 and the upper boss 21 is used to place the heat conduction block 11 of the Stirling generator 1; The axial fixing boss 23 is located on the inner surface of the heat dissipation support frame 2 and above the upper boss 21. The surface of the axial fixing boss 23 is provided with uniformly distributed waist-shaped holes 230 for connecting with the fixing plate 13 of the Stirling generator 1; The heat dissipation fins 24 are circumferentially and uniformly distributed on the outer surface of the heat dissipation support frame 2 and are arranged vertically along the axis, and are used to transfer the heat from the heat conduction block 11 to the pressure-resistant tank body 3; The countersunk holes 25 are located at the end of the heat dissipation support frame 2 and there are two rows, and are used to connect the heat dissipation support frame 2 with the annular connector 4.

[0043] Combined with Figures 1-6 As shown, the pressure-resistant tank body 3 is made of titanium alloy material. Its inner wall surface is provided with a groove 30 along the axis. The heat dissipation fins 24 on the outer surface of the heat dissipation support frame 2 are in transitional fit with the groove 30 and can slide along the groove 30 under the push of an external force. The wall surface of the annular connector 4 is provided with two rows of threaded holes 40 for fixedly connecting with the countersunk holes 25 of the heat dissipation support frame 2; The upper surface of the annular connector 4 is provided with a through hole 41 for fixedly connecting with the pressure-resistant tank cover 5. The pressure-resistant tank cover 5 is made of titanium alloy material. Its lower edge is provided with a sealing groove 50, and its lower surface is provided with a non-through threaded hole 51 and a through threaded hole 52. The sealing ring inside the sealing groove 50 can ensure the sealing performance of the pressure-resistant tank body 3 and the pressure-resistant tank cover 5 in a high-pressure environment. The non-through threaded hole 51 is used to fix the annular connector 4, and the through threaded hole 52 can be installed with a watertight connector for the input and output of the voltage of the Stirling generator 1.

[0044] In the solution of the present utility model, a unique two-piece heat dissipation support frame design is adopted. Combined with an arc-shaped pressing plate, a heat conduction block and heat dissipation fins, efficient conduction and dissipation of the heat inside the Stirling generator are achieved. This design not only improves the heat dissipation efficiency, but also reduces the thermal resistance through structural optimization, enabling the generator to operate stably in the deep-sea high-pressure and low-temperature environment. The heat dissipation fins are circumferentially and uniformly distributed on the outer surface of the heat dissipation support frame and are arranged vertically along the axis, and are in transitional fit with the groove on the inner wall of the pressure-resistant tank body. This design not only increases the heat dissipation area, but also further improves the heat conduction efficiency through physical contact, which is a major innovation in heat dissipation technology.

[0045] In addition, by designing components such as a Stirling generator, a heat dissipation support frame, and an annular connector into a modular structure, the utility model facilitates installation, debugging, and maintenance in the complex deep-sea environment. This modular design improves the reliability and maintainability of the system, reducing the difficulty and cost of deep-sea operations. The various modules are connected by standard parts such as bolts, which not only facilitates disassembly and assembly but also ensures the stability and tightness of the connection.

[0046] The pressure-resistant tank body and pressure-resistant tank cover of the utility model are made of titanium alloy materials, which have excellent pressure resistance and corrosion resistance, and can maintain the integrity and stability of the structure under the high-pressure deep-sea environment. The combined use of the sealing groove and the sealing ring, as well as the ingenious design of the non-through threaded holes and through threaded holes, jointly constitute an efficient and reliable sealing system, ensuring the tightness of the generator under high-pressure conditions and preventing damage to the generator caused by seawater penetration.

[0047] The device of the utility model has been comprehensively optimized in multiple aspects such as heat dissipation, fixation, and sealing, which not only improves the operating efficiency and stability of the Stirling generator but also extends its service life.

[0048] Combined Figures 1-6 As shown, a heat dissipation, fixation, and sealing device for a deep-sea Stirling generator proposed by the utility model includes the following installation steps:

[0049] S1. The heat conduction blocks 11 on both sides of the Stirling generator 1 are placed between the upper convex platform 21 and the lower convex platform 22 of the heat dissipation support frame 2. Bolts are respectively passed through the counterbore holes 210 of the upper convex platform 21 and the counterbore holes 220 of the lower convex platform 22 and tightened with the arc-shaped pressing plate 12 of the Stirling generator 1, so that the heat conduction blocks 11 are tightly attached to the inner surface of the heat dissipation support frame 2.

[0050] S2. The fixing plate 13 on the Stirling generator 1 is attached to the axial fixing convex platform 23 on the heat dissipation support frame 2, and the two are fastened with bolts.

[0051] S3. The outer wall surface of the annular connector 4 is attached to the inner surface of the heat dissipation support frame 2, and the two are fastened with bolts passing through the counterbore holes 25. The upper surface of the annular connector 4 is attached to the lower surface of the pressure-resistant tank cover 5, and the two are fixed with bolts passing through the through holes 41.

[0052] S4. The integrally fixed and connected Stirling generator 1, heat dissipation support frame 2, annular connector 4, and pressure-resistant end cover 5 are pushed into the interior of the pressure-resistant tank body 3 along the groove 30 on the inner wall of the pressure-resistant tank body 3, and the bolts between the pressure-resistant tank body 3 and the pressure-resistant end cover 5 are tightened to complete the fixing and sealing steps of the Stirling generator.

[0053] Working principle: Before the Stirling generator works in the deep-sea high-pressure environment, assemble the heat dissipation, fixing and sealing devices of the Stirling generator. Place the heat conduction blocks 11 on both sides of the Stirling generator 1 between the upper boss 21 and the lower boss 22 of the heat dissipation support frame 2. Use bolts to pass through the counterbore holes 210 of the upper boss 21 and the counterbore holes 220 of the lower boss 22 respectively, and tighten them with the arc-shaped pressing plate 12 of the Stirling generator 1, so that the heat conduction block 11 tightly fits the inner surface of the heat dissipation support frame 2; Fit the fixing plate 13 on the Stirling generator 1 with the axial fixing boss 23 on the heat dissipation support frame 2, and fasten the two with bolts; Fit the outer wall surface of the annular connecting piece 4 with the inner surface of the heat dissipation support frame 2, and fasten the two with bolts passing through the counterbore holes 25; Fit the upper surface of the annular connecting piece 4 with the lower surface of the pressure-resistant tank cover 5, and fix the two with bolts passing through the through holes 41; Push the whole of the fixedly connected Stirling generator 1, heat dissipation support frame 2, annular connecting piece 4 and pressure-resistant end cover 5 along the groove 30 on the inner wall of the pressure-resistant tank body 3 into the pressure-resistant tank body 3, and tighten the bolts between the pressure-resistant tank body 3 and the pressure-resistant end cover 5; In the deep-sea high-pressure environment, the heat generated by the operation of the Stirling generator 1 will be conducted to the surface of the pressure-resistant tank body 3 through the heat dissipation support frame 2. At the same time, the heat dissipation support frame 2 also provides a stable and reliable fixing structure for the Stirling generator 1 inside the pressure-resistant tank body 3. The pressure-resistant tank body 3, the pressure-resistant tank cover 5 and the sealing form between the two provide a good normal pressure environment for the Stirling generator 1.

[0054] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation, fixing and sealing device for a deep-sea Stirling generator, characterized in that The device includes a Stirling generator (1), a two-piece heat dissipation support frame (2), a pressure-resistant tank body (3), an annular connecting piece (4), and a pressure-resistant tank cover (5). The Stirling generator (1) and the two-piece heat dissipation support frame (2) are respectively constrained by bolts axially and radially. The outer wall surface and the upper surface of the annular connecting piece (4) are respectively connected to the heat dissipation support frame (2) and the pressure-resistant tank cover (5) by bolts. The Stirling generator (1), the two-piece heat dissipation support frame (2), and the annular connecting piece (4) are all placed inside the pressure-resistant tank body (3), and the internal normal pressure is ensured by the pressure-resistant tank cover (5), the pressure-resistant tank body (3), and the sealing structure therebetween.

2. The heat dissipation, fixing and sealing device of the deep-sea Stirling generator according to claim 1, characterized in that: The heat transfer and installation structure of the Stirling generator (1) includes a heat source (10), a heat conduction block (11), an arc-shaped pressing plate (12), and a fixing plate (13), where: The heat source (10) is an electric heating tube simulation heat source or an isotope heat source, and is located at the tail of the Stirling generator (1); Two heat conduction blocks (11) are symmetrically installed, which conduct the heat inside the Stirling generator (1) to the outer surface. The arc-shaped pressing plate (12) is closely attached to the inner surface of the heat conduction block (11), and the heat conduction block (11) is pressed against the heat dissipation support frame (2) by bolts; Two fixing plates (13) are symmetrically installed, and are located above the heat conduction block (11). Both sides of the fixing plate (13) are respectively connected to the Stirling generator (1) and the heat dissipation support plate (2) by bolts.

3. The heat dissipation, fixing and sealing device for the deep-sea Stirling generator according to claim 1 or 2, characterized in that: The heat dissipation support frame (2) is arc-shaped, and includes an upper convex platform (21), a lower convex platform (22), an axial fixing convex platform (23), heat dissipation fins (24), and countersunk holes (25), where: The upper convex platform (21) is located on the inner surface of the heat dissipation support frame (2), and the upper convex platform countersunk hole (210) penetrates through the heat dissipation support frame (2) and the upper convex platform (21) from the outer surface of the heat dissipation support frame (2); The lower convex platform (22) is located on the inner surface of the heat dissipation support frame (2), and the lower convex platform countersunk hole (220) penetrates through the heat dissipation support frame (2) and the lower convex platform (21) from the outer surface of the heat dissipation support frame (2); The heat conduction block (11) of the Stirling generator (1) is placed between the lower convex platform (22) and the upper convex platform (21); The axial fixing convex platform (23) is located on the inner surface of the heat dissipation support frame (2) and above the upper convex platform (21). The surface of the axial fixing convex platform (23) is provided with uniformly distributed waist-shaped holes (230) for connecting with the fixing plate (13) of the Stirling generator (1); The heat dissipation fins (24) are circumferentially and uniformly distributed on the outer surface of the heat dissipation support frame (2) and are arranged vertically along the axis, and are used to transfer the heat from the heat conduction block (11) to the pressure-resistant tank body (3); The countersunk holes (25) are located at the end of the heat dissipation support frame (2) and there are two rows, which are used to connect the heat dissipation support frame (2) and the annular connecting piece (4).

4. The heat dissipation, fixing and sealing device of the deep-sea Stirling generator according to claim 3, characterized in that: The pressure-resistant tank body (3) is made of titanium alloy material, and a groove (30) is axially opened on its inner wall surface. The heat dissipation fins (24) on the outer surface of the heat dissipation support frame (2) are in transitional fit with the groove (30) and slide along the groove (30) under the push of an external force.

5. The heat dissipation, fixing and sealing device of the deep-sea Stirling generator according to claim 1, characterized in that: Two rows of threaded holes (40) are provided on the wall surface of the annular connecting member (4) for fixedly connecting with the counterbore holes (25) of the heat dissipation support frame (2); a through hole (41) is provided on the upper surface of the annular connecting member (4) for fixedly connecting with the pressure-resistant tank cover (5).

6. The heat dissipation, fixing and sealing device for the deep-sea Stirling generator according to claim 1, characterized in that: A sealing groove (50) is provided on the lower edge of the pressure-resistant tank cover (5), and non-through threaded holes (51) and through threaded holes (52) are provided on the lower surface. The sealing ring inside the sealing groove (50) is used to ensure the sealing performance between the pressure-resistant tank body (3) and the pressure-resistant tank cover (5) under high-pressure environment. The non-through threaded holes (51) are used to fix the annular connecting member (4), and the through threaded holes (52) are installed with watertight connectors for the input and output of the voltage of the Stirling generator (1).

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