Propelling cabin section supporting structure applied to underwater vehicle and assembling method

Abstract

The propulsion module section supporting structure comprises a propulsion module section force bearing mandrel, a section bow upper clamping plate, a section bow lower clamping plate, a section middle upper clamping plate, a section middle lower clamping plate, a section tail upper clamping plate, a section tail lower clamping plate, a plurality of axial connecting square pipes and six port and starboard connecting square pipes. The overall structural stability and reliability of the underwater vehicle are effectively improved, the expandability is high, the assembly process and technology are simplified, the assembly efficiency is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of overall structure design technology for submersibles, and particularly relates to a support structure and assembly method for the propulsion section of a submersible. Background Technology

[0002] In the field of marine exploration and development, submersibles serve as an important underwater detection and operation tool, and their performance stability and reliability are crucial for completing complex underwater missions. The propulsion section, as a core component, not only houses key parts of the power system but also needs to maintain sufficient structural strength and sealing performance in extreme underwater environments.

[0003] Traditional underwater propulsion section support structures often employ complex welding or casting processes, resulting in large structural tolerances, high manufacturing costs, and heavy structures. Furthermore, the assembly process is cumbersome and prone to introducing assembly errors, thus affecting structural strength and sealing performance. While modular and standardized design concepts have been applied in recent years, improvements are still needed in structural strength, space utilization, and ease of assembly.

[0004] Patent US20160052637A1, "Method and Apparatus for Supporting an Engine and Nacelle Relative to an Aircraft Wing," discloses a method and apparatus for supporting an engine and nacelle relative to an aircraft wing. It mainly uses a set of cylindrical annular structures to load and fix the engine axially, and uses two non-perpendicular short tower columns to fix the propulsion nacelle to the wing. However, the above method has high requirements for the overall structural strength, cannot achieve lightweighting, and can only be assembled and fixed axially, which is difficult to assemble and requires high axial positioning accuracy. It also places high demands on the processing technology and precision of the support structure.

[0005] Patent CN101381003A, "A Novel Main Load-Bearing Structure for Spacecraft," discloses a novel main load-bearing structure for spacecraft based on a star-shaped truss structure. It designs a load mounting frame supported by struts to connect the propulsion module and the support base. By setting up an outer frame side plate structure and an internal star-shaped truss structure, a dual load-bearing path is achieved to transfer the load, further shortening the load-bearing path and achieving a compact design. The use of at least six even-numbered struts effectively balances the force load transfer. However, to improve strength, this method requires forming a large-volume frame around the propulsion module, sacrificing space to install multiple trusses that act as reinforcing ribs. Furthermore, while the non-perpendicular connection of the upper and lower end frames of the propulsion module to form a load-bearing cone achieves a lightweight design, it further increases the axial length of the propulsion module and the load-bearing structure, which is detrimental to noise control. Simultaneously, for a horizontally oriented cylindrical propulsion module, the radial support capacity is insufficient, failing to meet the multi-axial load-bearing and support requirements. Summary of the Invention

[0006] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a support structure and assembly method for the propulsion section of a submarine, which effectively improves the overall structural stability and reliability of the submarine, has strong scalability, improves space utilization, simplifies the assembly process and technology, and improves assembly efficiency.

[0007] The objective of this invention is achieved through the following technical solution: a propulsion section support structure for a submersible, comprising: a propulsion section load-bearing spindle, a bow upper clamping plate, a bow lower clamping plate, a mid-section upper clamping plate, a mid-section lower clamping plate, a stern upper clamping plate, a stern lower clamping plate, multiple axially connecting square tubes, and six port and starboard connecting square tubes; wherein, the bottom of the propulsion section load-bearing spindle is connected to the middle of the bow lower clamping plate, the middle of the mid-section lower clamping plate, and the middle of the stern lower clamping plate, respectively; the bow lower clamping plate, the mid-section lower clamping plate, and the stern lower clamping plate are arranged in parallel along the direction from the bow to the stern; the top of the propulsion section load-bearing spindle is connected to the middle of the bow upper clamping plate, the middle of the mid-section upper clamping plate, and the middle of the stern upper clamping plate, respectively; the bow upper clamping plate, the bow lower ... The upper clamping plate in the middle section and the upper clamping plate at the stern of the section are arranged in parallel from the bow to the stern, and the installation position of the upper clamping plate at the bow corresponds to the installation position of the lower clamping plate at the bow, the installation position of the upper clamping plate in the middle section corresponds to the installation position of the lower clamping plate in the middle section, and the installation position of the upper clamping plate at the stern corresponds to the installation position of the lower clamping plate at the stern. One end of a portion of the axially connecting square tubes passes sequentially through the first port and starboard connecting square tube, the lower clamping plate at the bow, the second port and starboard connecting square tube, the lower clamping plate in the middle section, the third port and starboard connecting square tube, and the lower clamping plate at the stern. One end of the remaining portion of the axially connecting square tubes passes sequentially through the fourth port and starboard connecting square tube, the upper clamping plate at the bow, the fifth port and starboard connecting square tube, the upper clamping plate in the middle section, the sixth port and starboard connecting square tube, and the upper clamping plate at the stern.

[0008] In the aforementioned propulsion section support structure applied to a submarine, the propulsion section load-bearing mandrel is a rectangular hollow square tube structure with uniform wall thickness. Three flange bosses are sequentially arranged on the propulsion section load-bearing mandrel from bow to stern. The first flange boss is connected to the middle of the upper and lower bow clamping plates, the second flange boss is connected to the middle of the upper and lower clamping plates, and the third flange boss is connected to the middle of the upper and lower stern clamping plates.

[0009] In the aforementioned propulsion section support structure applied to submarines, the upper bow clamp, lower bow clamp, upper middle clamp, lower middle clamp, upper stern clamp, and lower stern clamp are all thin plate frames with a "mountain-shaped" cross-section. The left and right recesses of the "mountain-shaped" section are equipped with arc-shaped support platforms of the same diameter.

[0010] In the aforementioned propulsion section support structure applied to submarines, a rectangular recess is provided at the top center of the "mountain-shaped" thin plate frame, and the propulsion section load-bearing spindle is located within the recess.

[0011] In the aforementioned propulsion section support structure applied to submarines, the internal stress generated by the section load on the propulsion section load-bearing spindle during assembly is: ; ; in, To reduce the internal stress generated by the load on the compartment during assembly, The maximum bending moment at the critical section of the propulsion module's load-bearing spindle. To improve the bending section modulus of the load-bearing mandrel at the critical section, The shorter side length of the outer contour of the load-bearing mandrel section. To determine the length of the long side of the outer contour of the load-bearing mandrel section of the propulsion module, To adjust the shorter side length of the inner contour of the load-bearing mandrel section of the propulsion module, The length of the long side of the inner contour of the load-bearing mandrel section of the propulsion module.

[0012] In the aforementioned propulsion section support structure applied to submarines, the upper bow clamp, lower bow clamp, upper middle clamp, lower middle clamp, upper stern clamp, and lower stern clamp all have multiple through channels in the thickness direction.

[0013] In the aforementioned propulsion section support structure applied to submarines, the axially connecting square tube is a thin-walled hollow tube structure, and the cross-section of the axially connecting square tube is square.

[0014] In the aforementioned propulsion section support structure applied to submarines, the port and starboard connecting square tubes are thin-walled hollow tube structures with rectangular cross-sections, wherein the longer side of the rectangle is 1.5 to 2 times the length of the shorter side.

[0015] In the aforementioned propulsion section support structure applied to submarines, the upper and lower bow clamps have the same shape and size parameters, the upper and lower middle clamps have the same shape and size parameters, and the upper and lower stern clamps have the same shape and size parameters.

[0016] A method for assembling a propulsion section support structure for a submarine includes: supporting the propulsion section's load-bearing spindle; sequentially moving the lower bow plate, the lower mid-section plate, and the lower stern plate to the bottom of the propulsion section's load-bearing spindle along the bow-to-stern direction, with the front panels of the lower bow plate, the lower mid-section plate, and the lower stern plate all facing the bow direction; connecting the lower bow plate to the first flange boss; connecting the lower mid-section plate to the second flange boss; and connecting the lower stern plate to the third flange boss; and sequentially passing one end of an axially connecting square tube through the first port and starboard connecting square tube, the lower bow plate, and the second port and starboard connecting square tube. The section includes a lower clamping plate, a third port and starboard connecting square tube, and a lower clamping plate at the stern. Two sets of propulsion compartments on the port and starboard sides are symmetrically placed on the lower clamping plates at the bow, the middle, and the stern. The protrusions of the propulsion compartments are located behind the lower clamping plates and fixed to them with bolts. The upper clamping plates at the bow, the middle, and the stern are arranged sequentially on the propulsion compartment section's load-bearing spindle and above the two sets of propulsion compartments. One end of the axially connecting square tube passes sequentially through the fourth port and starboard connecting square tube, the upper clamping plate at the bow, the fifth port and starboard connecting square tube, the upper clamping plate at the middle, the sixth port and starboard connecting square tube, and the upper clamping plate at the stern.

[0017] Compared with the prior art, the present invention has the following advantages: This invention optimizes the coupling force transmission path of the propulsion section's load-bearing structure, achieving modular assembly and standardized interface design. This effectively improves the overall structural stability and reliability of the submersible, enhances its scalability, increases space utilization, simplifies assembly processes and technologies, improves assembly efficiency, and reduces manufacturing costs. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the assembly of the load-bearing mandrel and the bottom support structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly of the bottom support bracket of the propulsion section support mandrel provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the propulsion compartment load-bearing frame assembly provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the support structure and overall assembly of the propulsion section of a submarine provided in an embodiment of the present invention. Detailed Implementation

[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the assembly of the load-bearing mandrel and the bottom support structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly of the bottom support bracket of the propulsion section support mandrel provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the propulsion compartment load-bearing frame assembly provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the support structure and overall assembly of the propulsion section of a submarine provided in an embodiment of the present invention.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the propulsion section support structure used in submarines includes: a propulsion section load-bearing spindle 1, an upper bow clamping plate 2, a lower bow clamping plate 3, an upper mid-section clamping plate 4, a lower mid-section clamping plate 5, an upper stern clamping plate 6, a lower stern clamping plate 7, multiple axially connecting square tubes 8, and six port and starboard connecting square tubes 9. Among them, The bottom of the propulsion section load-bearing mandrel 1 is connected to the middle of the lower bow clamp 3, the middle of the lower mid-section clamp 5, and the middle of the lower stern clamp 7, respectively. The lower bow clamp 3, the lower mid-section clamp 5, and the lower stern clamp 7 are arranged in parallel from the bow to the stern. The top of the propulsion section load-bearing mandrel 1 is connected to the middle of the upper bow clamp 2, the middle of the upper mid-section clamp 4, and the middle of the upper stern clamp 6, respectively. The upper bow clamp 2, the upper mid-section clamp 4, and the upper stern clamp 6 are arranged in parallel from the bow to the stern. The installation position of the upper bow clamp 2 corresponds to the installation position of the lower bow clamp 3, the installation position of the upper mid-section clamp 4 corresponds to the installation position of the lower mid-section clamp 5, and the installation position of the upper stern clamp 6 corresponds to the installation position of the lower stern clamp 7. One end of a portion of the axially connecting square tube 8 passes sequentially through the first port and starboard connecting square tube 9, the lower bow clamp 3, the second port and starboard connecting square tube 9, the lower mid-section clamp 5, the third port and starboard connecting square tube 9, and the lower stern clamp 7. The remaining ends of the axially connecting square tubes 8 pass sequentially through the fourth port and starboard connecting square tube 9, the upper bow clamp 2, the fifth port and starboard connecting square tube 9, the upper mid-section clamp 4, the sixth port and starboard connecting square tube 9, and the upper stern clamp 6.

[0022] The load-bearing mandrel 1 is a rectangular hollow square tube structure with flange bosses and bolt fixing holes for connection and fixation with each clamping plate. Both upper and lower clamping plates are "mountain-shaped" thin-plate frames with arc-shaped receiving platforms and rectangular recesses for tight fit with the load-bearing mandrel and propulsion compartment. Axial connecting square tubes 8 and port and starboard connecting square tubes 9 connect the clamping plates, forming a stable support frame. During assembly, the load-bearing mandrel is fixed first, then the upper and lower clamping plates and connecting square tubes are installed sequentially, and finally the propulsion compartment is installed. Furthermore, the cross-sectional dimensions (length, width, and wall thickness) of the load-bearing mandrel are checked according to mechanical formulas to ensure structural strength and stability. The support structure and assembly method of this invention fully consider the force transmission path under underwater navigation and storage conditions of the submersible, and conduct coupled force transmission optimization design for the propulsion compartment load-bearing structure, achieving modular assembly and standardized interface design. This effectively improves the overall structural stability and reliability of the submersible, has strong scalability, simplifies the assembly process and technology, improves assembly efficiency, and reduces manufacturing costs.

[0023] The propulsion section load-bearing mandrel 1 is a rectangular hollow square tube structure with uniform wall thickness. The propulsion section load-bearing mandrel 1 has three flange bosses arranged sequentially from the bow to the stern. The first flange boss is connected to the middle of the upper clamping plate 2 and the lower clamping plate 3 at the bow. The second flange boss is connected to the middle of the upper clamping plate 4 and the lower clamping plate 5 in the middle section. The third flange boss is connected to the middle of the upper clamping plate 6 and the lower clamping plate 7 at the stern.

[0024] The propulsion section's load-bearing mandrel 1 is a hollow square tube structure with a rectangular boundary profile and uniform wall thickness. Three flange bosses are sequentially installed from the bow to the stern. These three bosses have weld deposits facing the bow, while the weld roots facing the stern are cleaned. Multiple bolt holes are located on both the port and starboard sides of the three flange bosses for connection and fixation to the various clamping plates. The position of the flange bosses is related to the load-bearing bosses of the propulsion section; the two are tightly fitted together through the clamping plates to achieve effective thrust transfer.

[0025] When installing the propulsion section load-bearing spindle 1, the shorter side faces upward, which can effectively increase the structural bending strength and save space on the port and starboard sides for mounting the two sets of propulsion modules on the port and starboard sides.

[0026] The upper bow clamp 2, lower bow clamp 3, upper middle clamp 4, lower middle clamp 5, upper stern clamp 6, and lower stern clamp 7 are all thin-plate frames with a "mountain-shaped" cross-section. Both sides of the "mountain-shaped" frame have arc-shaped support platforms of the same diameter. A rectangular recess is located at the top center of the "mountain-shaped" thin-plate frame, within which the propulsion section's load-bearing mandrel 1 is positioned. The upper bow clamp 2 and lower bow clamp 3 have identical shapes and dimensions; the upper middle clamp 4 and lower middle clamp 5 have identical shapes and dimensions; and the upper stern clamp 6 and lower stern clamp 7 have identical shapes and dimensions.

[0027] The upper clamping plate 2, lower clamping plate 3, upper clamping plate 4, lower clamping plate 5, upper clamping plate 6, and lower clamping plate 7 at the bow are all thin plate frames with a "mountain" shaped cross-section. The left and right recesses of the "mountain" shape are equipped with arc-shaped receiving platforms of the same diameter, which are the outer diameter of a standard underwater cylindrical body, such as 533mm or 324mm.

[0028] At the top of the "mountain" shaped structure of each of the following sections—bow upper clamping plate 2, bow lower clamping plate 3, middle upper clamping plate 4, middle lower clamping plate 5, stern upper clamping plate 6, and stern lower clamping plate 7—a rectangular recessed platform is provided. Bolt holes are provided on the vertical walls on both sides of the recessed platform, which is then installed and fixed to the propulsion section load-bearing mandrel 1 using set bolts 10. The longitudinal side length of the rectangle is half the longitudinal side length of the propulsion section load-bearing mandrel 1, and the transverse side length is equal to the transverse side length of the propulsion section load-bearing mandrel 1.

[0029] The front ends of the thick plate frames, including the upper and lower baffle plates 2 and 3, the upper and lower baffle plates 4 and 5, the upper and lower baffle plates 6 and 7, are closed flat structures with the plate surface flush with the boundary contour. The rear ends are open and concave structures. The plate thickness is consistent throughout and needs to be adjusted according to the load-bearing capacity; in this example, it is set to 10-12 mm. Each baffle plate has multiple circular and square through channels along its thickness direction for weight reduction. Multiple symmetrical reinforcing ribs are placed around these through channels to improve the overall structural strength. Each baffle plate has six square through channels, which also serve to connect and fix it to the axially connected square tube 8.

[0030] The upper clamping plate 2 and the lower clamping plate 3 of the bow section, the upper clamping plate 4 and the lower clamping plate 5 of the middle section, and the upper clamping plate 6 and the lower clamping plate 7 of the tail section have the same shape and size parameters. During the assembly process, according to the three intra-section division interfaces of the bow, middle and tail sections, the upper and lower clamping plates are connected in sequence with the platform at the top of the "mountain" shape, with the front end plates facing forward. The centers of the arc-shaped receiving platforms on the left and right sides of the "mountain" shape of the upper and lower clamping plates coincide.

[0031] The upper clamp plate 2 at the bow, the upper clamp plate 4 in the middle, and the upper clamp plate 6 at the stern all feature "mountain-shaped" boss-like structural interfaces of the same shape and size, but with different longitudinal heights. The cross-sectional area of ​​the three clamp plates decreases sequentially from the bow to the stern, corresponding to a gradual reduction in the overall external shape envelope of the propulsion compartment section from bow to stern. Each of the three upper clamp plates has a platform and bolt mounting holes or other interface types at its top for installing skin supports and maintaining the submarine's hull shape.

[0032] The rectangular recesses at the top of the "mountain" shape of the upper clamping plate 2 and lower clamping plate 3 of the bow section, the upper clamping plate 4 and lower clamping plate 5 of the middle section, and the upper clamping plate 6 and lower clamping plate 7 of the stern section are all fitted onto the upper and lower sides of the propulsion section load-bearing spindle 1. The front flat surfaces of the upper and lower clamping plates of the bow, middle, and stern sections are tightly fitted to the rear end faces of the three flange bosses of the propulsion section load-bearing spindle 1 and are connected and fixed by set bolts 10.

[0033] The internal stress generated by the load applied to the propulsion section bearing mandrel 1 during assembly is as follows: ; ; in, To prevent the internal stress generated by the load on the compartment section during assembly, the load-bearing mandrel 1 of the propulsion section is subjected to the load on the compartment section. The maximum bending moment at the critical section of the propulsion module's load-bearing spindle. To improve the bending section modulus of the load-bearing mandrel at the critical section, The shorter side length of the outer contour of the load-bearing mandrel section. To determine the length of the long side of the outer contour of the load-bearing mandrel section of the propulsion module, To adjust the shorter side length of the inner contour of the load-bearing mandrel section of the propulsion module, The length of the long side of the inner contour of the load-bearing mandrel section of the propulsion module.

[0034] The upper clamping plate 2 at the bow, the lower clamping plate 3 at the bow, the upper clamping plate 4 in the middle of the section, the lower clamping plate 5 in the middle of the section, the upper clamping plate 6 at the tail of the section, and the lower clamping plate 7 at the tail of the section all have multiple through channels in the thickness direction.

[0035] The axially connecting square tube 8 is a thin-walled hollow tube structure, and its cross-section is square. The port and starboard connecting square tubes 9 are also thin-walled hollow tube structures, and their cross-sections are rectangular, wherein the longer side of the rectangle is 1.5 to 2 times the length of the shorter side.

[0036] Both the axial connecting square tube 8 and the port and starboard connecting square tubes 9 are thin-walled hollow tube structures with square cross-sections. The axial connecting square tube 8 has a square cross-section, while the port and starboard connecting square tubes 9 have a rectangular cross-section. Their short sides are the same, and their long sides are 1.5 to 2 times the length of the short sides. Standard diameter square tube structures can be used, made of aluminum alloy or steel, with the optimal choice based on the strength and weight requirements of the assembly structure. There are 12 axial connecting square tubes 8, each of uniform length; and 6 port and starboard connecting square tubes 9, each of uniform length.

[0037] The axial connecting square tube 8 has three longitudinal through bolt holes from front to back along the vertical direction. These holes are used to connect and fix the tube to the upper and lower clamping plates of the section bow, middle and tail during assembly. The axial spacing of the bolt holes is consistent with the spacing of the three bosses of the propulsion section load-bearing spindle 1.

[0038] Two sets of through holes are provided in the middle of the rectangular surface along the long side of the cross-section of the port and starboard connecting square tube 9, for installation and fixation with the three lower clamping plates. Two sets of through holes are provided at both ends along the rectangular surface along the short side of the cross-section, for installation and fixation with the axial connecting square tube 8.

[0039] The propulsion section load-bearing spindle 1 is the main load-bearing structure of the two propulsion sections. Its cross-sectional length, width, and wall thickness are mainly checked according to the following formula.

[0040] ,

[0041] in, The internal stress generated by the load on the load-bearing mandrel during assembly with other structures and the propulsion compartment (the stress generated by the load on the critical section of the load-bearing mandrel). The bending stress at which the load-bearing mandrel begins to undergo plastic deformation; For safety reasons, it is recommended to use high-strength steel or equivalent high-performance aluminum alloys, titanium alloys, etc., for the machining of the load-bearing mandrel in this example. When using high-strength steel, it is recommended to... Select a value of 2 to 3; This refers to the allowable stress during the design process of the load-bearing mandrel. The maximum bending moment at the critical section of the load-bearing mandrel, expressed in N·mm; This is the section modulus of the load-bearing mandrel at the critical section, in mm. 3 .

[0042] It should be noted that, considering the cross-sectional shape of the load-bearing mandrel in this example, the formula for calculating its bending section modulus is as follows:

[0043] in, The shorter side length of the outer contour of the load-bearing mandrel section. The length of the longer side of the outer contour of the load-bearing mandrel section. The shorter side length of the inner contour of the load-bearing mandrel section. The length of the longer side of the inner contour of the load-bearing mandrel section is given in mm.

[0044] Specifically, this embodiment provides a segment connection structure for use in submarines, such as... Figures 1 to 4 As shown, it includes the propulsion section load-bearing mandrel 1, the upper bow clamp 2, the lower bow clamp 3, the upper mid-section clamp 4, the lower mid-section clamp 5, the upper stern clamp 6, the lower stern clamp 7, the axial connecting square tube 8, the port and starboard connecting square tubes 9, and the set bolt 10.

[0045] The propulsion section's load-bearing mandrel 1 is a hollow square tube structure with a rectangular boundary profile and uniform wall thickness. Three flange bosses are sequentially installed from the bow to the stern. These three bosses have weld deposits facing the bow, while the weld roots facing the stern are cleaned. Multiple bolt holes are located on both the port and starboard sides of the three flange bosses for connection and fixation to the various clamping plates. The position of the flange bosses is related to the load-bearing bosses of the propulsion section; the two are tightly fitted together through the clamping plates to achieve effective thrust transmission.

[0046] When installing the propulsion section load-bearing spindle 1, the shorter side faces upward, which can effectively increase the structural bending strength and save space on the port and starboard sides for mounting the two sets of propulsion modules on the port and starboard sides.

[0047] The upper clamping plate 2, lower clamping plate 3, upper clamping plate 4, lower clamping plate 5, upper clamping plate 6, and lower clamping plate 7 at the bow are all thin plate frames with a "mountain" shaped cross-section. The left and right recesses of the "mountain" shape are equipped with arc-shaped receiving platforms of the same diameter, which are the outer diameter of a standard underwater cylindrical body, such as 533mm or 324mm.

[0048] At the top of the "mountain" shaped structure of each of the following sections—bow upper clamping plate 2, bow lower clamping plate 3, middle upper clamping plate 4, middle lower clamping plate 5, stern upper clamping plate 6, and stern lower clamping plate 7—a rectangular recessed platform is provided. Bolt holes are provided on the vertical walls on both sides of the recessed platform, which is then installed and fixed to the propulsion section load-bearing mandrel 1 using set bolts 10. The longitudinal side length of the rectangle is half the longitudinal side length of the propulsion section load-bearing mandrel 1, and the transverse side length is equal to the transverse side length of the propulsion section load-bearing mandrel 1.

[0049] The front ends of the thick plate frames, including the upper and lower baffle plates 2 and 3, the upper and lower baffle plates 4 and 5, the upper and lower baffle plates 6 and 7, are closed flat structures with the plate surface flush with the boundary contour. The rear ends are open and concave structures. The plate thickness is consistent throughout and needs to be adjusted according to the load-bearing capacity; in this example, it is set to 10-12 mm. Each baffle plate has multiple circular and square through channels along its thickness direction for weight reduction. Multiple symmetrical reinforcing ribs are placed around these through channels to improve the overall structural strength. Each baffle plate has six square through channels, which also serve to connect and fix it to the axially connected square tube 8.

[0050] The upper clamping plate 2 and lower clamping plate 3 at the bow, the upper clamping plate 4 and lower clamping plate 5 in the middle, and the upper clamping plate 6 and lower clamping plate 7 at the tail are identical in shape and size. During assembly, according to the three intra-section division interfaces of the bow, middle, and tail, the upper and lower clamping plates are connected sequentially with the platform at the top of the "mountain" shape, with the front end plates facing forward. The centers of the arc-shaped receiving platforms on the left and right sides of the "mountain" shape of the upper and lower clamping plates coincide.

[0051] The upper clamp plate 2 at the bow, the upper clamp plate 4 in the middle, and the upper clamp plate 6 at the stern all feature "mountain-shaped" boss-like structural interfaces of the same shape and size, but with different longitudinal heights. The cross-sectional area of ​​the three clamp plates decreases sequentially from the bow to the stern, corresponding to a gradual reduction in the overall external shape envelope of the propulsion compartment section from bow to stern. Each of the three upper clamp plates has a platform and bolt mounting holes or other interface types at its top for installing skin supports and maintaining the submarine's hull shape.

[0052] The rectangular recesses at the top of the "mountain" shape of the upper clamping plate 2 and lower clamping plate 3 of the bow section, the upper clamping plate 4 and lower clamping plate 5 of the middle section, and the upper clamping plate 6 and lower clamping plate 7 of the stern section are all fitted onto the upper and lower sides of the propulsion section load-bearing spindle 1. The front flat surfaces of the upper and lower clamping plates of the bow, middle, and stern sections are tightly fitted to the rear end faces of the three flange bosses of the propulsion section load-bearing spindle 1 and are connected and fixed by set bolts 10.

[0053] Both the axial connecting square tube 8 and the port and starboard connecting square tubes 9 are thin-walled hollow tube structures with square cross-sections. The axial connecting square tube 8 has a square cross-section, while the port and starboard connecting square tubes 9 have a rectangular cross-section. Their short sides are the same, and their long sides are 1.5 to 2 times the length of the short sides. Standard diameter square tube structures can be used, made of aluminum alloy or steel, with the optimal choice based on the strength and weight requirements of the assembly structure. There are 12 axial connecting square tubes 8, each of uniform length; and 6 port and starboard connecting square tubes 9, each of uniform length.

[0054] The axial connecting square tube 8 has three longitudinal through bolt holes from front to back along the vertical direction. These holes are used to connect and fix the tube to the upper and lower clamping plates of the section bow, middle and tail during assembly. The axial spacing of the bolt holes is consistent with the spacing of the three bosses of the propulsion section load-bearing spindle 1.

[0055] Two sets of through holes are provided in the middle of the rectangular surface along the long side of the cross-section of the port and starboard connecting square tube 9, for installation and fixation with the three lower clamping plates. Two sets of through holes are provided at both ends along the rectangular surface along the short side of the cross-section, for installation and fixation with the axial connecting square tube 8.

[0056] The specific assembly method of the propulsion section load-bearing mandrel 1 with the upper and lower clamping plates of the bow, mid-section, and stern sections is as follows: First, support the propulsion section load-bearing mandrel 1 to ensure that the short side surface is horizontal. Second, from the bow to the stern, move the lower clamping plate 3 of the bow section, the lower clamping plate 5 of the mid-section, and the lower clamping plate 7 of the stern section to the underside of the propulsion section load-bearing mandrel 1 in sequence. The front panels of the three sets of lower clamping plates face the bow direction and fit tightly against the three flange bosses at the stern end face of the propulsion section load-bearing mandrel 1. Finally, through two sets of long bolt fasteners, pass through the left end of the recessed platform at the top of the "mountain" shape of the lower clamping plate, the pre-reserved bolt through hole at the bottom of the propulsion section load-bearing mandrel 1, and the right end of the recessed platform at the top of the "mountain" shape of the lower clamping plate in the horizontal direction, and secure them with set bolts 10.

[0057] After the propulsion section load-bearing mandrel 1 is installed and fixed to the lower clamping plates of each section (bow, mid-section, and stern), six axial connecting square tubes 8 are sequentially inserted into the three sets of lower clamping plates from the stern direction. When inserting the two axial connecting square tubes 8 located in the middle position, three port and starboard connecting square tubes 9 need to be arranged in advance below the propulsion section load-bearing mandrel 1, and their rectangular surfaces should be tightly fitted to the bow flat surface of the three sets of lower clamping plates. The two axial connecting square tubes 8 pass through the corresponding port and starboard connecting square tubes 9 at the same time as passing through the lower clamping plates, and the axial connecting square tubes 8 and port and starboard connecting square tubes 9, and the axial connecting square tubes 8 and the three sets of lower clamping plates are sequentially fixed by the set bolts 10.

[0058] After the propulsion section load-bearing spindle 1 and the bottom support frame are installed, the two sets of propulsion compartments on the port and starboard sides are symmetrically placed on the three lower clamps. The protrusions of the propulsion compartments are placed behind the lower clamps and fixed to the clamps with bolts to complete the axial front and rear limit.

[0059] After the bottom structure is installed, the upper clamping plate 2 at the bow, the upper clamping plate 4 in the middle, and the upper clamping plate 6 at the stern are arranged in sequence above the propulsion compartment bearing spindle 1 and the two sets of propulsion compartments. The insertion, installation, and fixing of the three port and starboard connecting square tubes 9 and the six axial connecting square tubes 8 at the top are completed. The specific installation method and process are the same as those for the bottom structure.

[0060] The propulsion section load-bearing spindle 1 is the main load-bearing structure for the two propulsion sections in this example. Its cross-sectional length, width, and wall thickness are mainly verified by the following formula.

[0061] ,

[0062] in, The internal stress generated by the load on the load-bearing mandrel during assembly with other structures and the propulsion compartment (the stress generated by the load on the critical section of the load-bearing mandrel). The bending stress at which the load-bearing mandrel begins to undergo plastic deformation; For safety reasons, it is recommended to use high-strength steel or equivalent high-performance aluminum alloys, titanium alloys, etc., for the machining of the load-bearing mandrel in this example. When using high-strength steel, it is recommended to... Select a value of 2 to 3; This refers to the allowable stress during the design process of the load-bearing mandrel. The maximum bending moment at the critical section of the load-bearing mandrel, expressed in N·mm; This is the section modulus of the load-bearing mandrel at the critical section, in mm. 3 .

[0063] It should be noted that, considering the cross-sectional shape of the load-bearing mandrel in this example, the formula for calculating its bending section modulus is as follows:

[0064] in, The shorter side length of the outer contour of the load-bearing mandrel section. The length of the longer side of the outer contour of the load-bearing mandrel section. The shorter side length of the inner contour of the load-bearing mandrel section. The length of the longer side of the inner contour of the load-bearing mandrel section is given in mm.

[0065] This embodiment also provides a method for assembling a propulsion section support structure for a submarine, the method comprising: Support the propulsion section load-bearing spindle 1, and move the lower bow plate 3, the lower mid-section plate 5, and the lower stern plate 7 sequentially to the bottom of the propulsion section load-bearing spindle 1 along the bow to stern direction. The front panels of the lower bow plate 3, the lower mid-section plate 5, and the lower stern plate 7 all face the bow direction. Connect the lower bow plate 3 to the first flange boss, connect the lower mid-section plate 5 to the second flange boss, and connect the lower stern plate 7 to the third flange boss. One end of the axial connecting square tube 8 is passed sequentially through the first port and starboard connecting square tube 9, the bow section lower clamping plate 3, the second port and starboard connecting square tube 9, the mid-section lower clamping plate 5, the third port and starboard connecting square tube 9 and the stern section lower clamping plate 7. The two sets of propulsion compartments on the port and starboard sides are symmetrically placed on the three lower clamp plates: the lower clamp plate 3 at the bow, the lower clamp plate 5 in the middle, and the lower clamp plate 7 at the stern. The protrusion of the propulsion compartment is located behind the lower clamp plate and is fixed to the lower clamp plate with bolts. The upper clamping plate 2 at the bow, the upper clamping plate 4 in the middle, and the upper clamping plate 6 at the stern are arranged sequentially on the upper part of the propulsion section bearing spindle 1 and the two propulsion sections. One end of the axial connecting square tube 8 is sequentially passed through the fourth port and starboard connecting square tube 9, the bow section upper clamping plate 2, the fifth port and starboard connecting square tube 9, the mid-section upper clamping plate 4, the sixth port and starboard connecting square tube 9, and the stern section upper clamping plate 6.

[0066] The specific assembly method of the propulsion section load-bearing mandrel 1 with the upper and lower clamping plates of the bow, mid-section, and stern is as follows: First, support the propulsion section load-bearing mandrel 1 to ensure that the short side is horizontal. From the bow to the stern, move the lower clamping plate 3 of the bow section, the lower clamping plate 5 of the mid-section, and the lower clamping plate 7 of the stern section in sequence to the underside of the propulsion section load-bearing mandrel 1. The front panels of the three sets of lower clamping plates face the bow direction and are tightly fitted with the three flange bosses at the stern end face of the propulsion section load-bearing mandrel 1. Two sets of long bolt fasteners are used to pass through the left end of the recessed platform at the top of the "mountain" shape of the lower clamping plate, the pre-reserved bolt through hole at the bottom of the propulsion section load-bearing mandrel 1, and the right end of the recessed platform at the top of the "mountain" shape of the lower clamping plate in the horizontal direction in sequence, and are then tightened and fixed by the set bolt 10.

[0067] After the propulsion section load-bearing mandrel 1 is installed and fixed to the lower clamping plates of each section (bow, mid-section, and stern), six axial connecting square tubes 8 are sequentially inserted into the three sets of lower clamping plates from the stern direction. When inserting the two axial connecting square tubes 8 located in the middle position, three port and starboard connecting square tubes 9 need to be arranged in advance below the propulsion section load-bearing mandrel 1, and their rectangular surfaces should be tightly fitted to the bow flat surface of the three sets of lower clamping plates. The two axial connecting square tubes 8 pass through the corresponding port and starboard connecting square tubes 9 at the same time as passing through the lower clamping plates, and the axial connecting square tubes 8 and port and starboard connecting square tubes 9, and the axial connecting square tubes 8 and the three sets of lower clamping plates are sequentially fixed by the set bolts 10.

[0068] After the propulsion section load-bearing spindle 1 and the bottom support frame are installed, the two sets of propulsion compartments on the port and starboard sides are symmetrically placed on the three lower clamps. The protrusions of the propulsion compartments are set behind the lower clamps and fixed to the clamps with bolts to complete the axial front and rear limit.

[0069] After the bottom structure is installed, the upper clamping plate 2 at the bow, the upper clamping plate 4 in the middle, and the upper clamping plate 6 at the stern are arranged in sequence above the propulsion compartment bearing spindle 1 and the two sets of propulsion compartments. The insertion, installation, and fixing of the three port and starboard connecting square tubes 9 and the six axial connecting square tubes 8 at the top are completed. The specific installation method and process are the same as those for the bottom structure.

[0070] This embodiment aims to provide a modular and standardized support structure that is simple in structure, easy to assemble, has high space utilization, and reliable structural strength. The support structure mainly includes a propulsion section load-bearing mandrel, upper and lower clamping plates, axial connecting square tubes, port and starboard connecting square tubes, and set bolts. The load-bearing mandrel is a rectangular hollow square tube structure with flange bosses and bolt fixing holes for connection and fixation to the clamping plates. The upper and lower clamping plates are both "mountain-shaped" thin-plate frames with arc-shaped receiving platforms and rectangular recesses for tight fit with the load-bearing mandrel and propulsion compartment. The axial connecting square tubes and port and starboard connecting square tubes connect the clamping plates, forming a stable support frame. During assembly, the load-bearing mandrel is fixed first, then the upper and lower clamping plates and connecting square tubes are installed sequentially, and finally the propulsion compartment is installed. Furthermore, the cross-sectional dimensions (length, width, and wall thickness) of the load-bearing mandrel are checked according to mechanical formulas to ensure structural strength and stability. The support structure and assembly method of this invention fully consider the force transmission path under the working conditions of underwater navigation and ground storage of the submersible, and carry out coupled force transmission optimization design for the load-bearing structure of the propulsion section. It realizes modular assembly and standardized interface design, effectively improves the overall structural stability and reliability of the submersible, has strong scalability, simplifies the assembly process and technology, improves assembly efficiency, and reduces manufacturing costs.

[0071] This embodiment ensures the overall strength and stability of the structure by analyzing the main force transmission paths, making precise calculations, and using modular design, thereby reducing the safety risks caused by structural failure. This embodiment adopts a modular assembly method, which simplifies the manufacturing process, reduces the need for high-precision equipment and complex processes, and improves production efficiency. This embodiment improves space utilization and reduces structural weight by optimizing the shape and size of the clamping plates and the layout of the connecting square tubes, which helps to improve the maneuverability and endurance of the submarine.

[0072] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A propulsion pod support structure for application to a submersible, characterized by Comprise: The propulsion cabin section force-bearing mandrel (1), the section bow upper clamping plate (2), the section bow lower clamping plate (3), the section middle upper clamping plate (4), the section middle lower clamping plate (5), the section tail upper clamping plate (6), the section tail lower clamping plate (7), a plurality of axial connection square tubes (8) and six left and right side connection square tubes (9); wherein, The bottom of the propulsion cabin section force-bearing mandrel (1) is connected with the middle part of the section bow lower clamping plate (3), the middle part of the section middle lower clamping plate (5) and the middle part of the section tail lower clamping plate (7) respectively, and the section bow lower clamping plate (3), the section middle lower clamping plate (5) and the section tail lower clamping plate (7) are arranged in parallel along the direction from the section bow to the section tail; The top of the propulsion cabin section force-bearing mandrel (1) is connected with the middle part of the section bow upper clamping plate (2), the middle part of the section middle upper clamping plate (4) and the middle part of the section tail upper clamping plate (6) respectively, the section bow upper clamping plate (2), the section middle upper clamping plate (4) and the section tail upper clamping plate (6) are arranged in parallel along the direction from the section bow to the section tail, and the installation position of the section bow upper clamping plate (2) corresponds to the installation position of the section bow lower clamping plate (3), the installation position of the section middle upper clamping plate (4) corresponds to the installation position of the section middle lower clamping plate (5), and the installation position of the section tail upper clamping plate (6) corresponds to the installation position of the section tail lower clamping plate (7); One end of part of the axial connection square tube (8) passes through the first left and right side connection square tube (9), the section bow lower clamping plate (3), the second left and right side connection square tube (9), the section middle lower clamping plate (5), the third left and right side connection square tube (9) and the section tail lower clamping plate (7) in sequence; One end of the rest of the axial connection square tube (8) passes through the fourth left and right side connection square tube (9), the section bow upper clamping plate (2), the fifth left and right side connection square tube (9), the section middle upper clamping plate (4), the sixth left and right side connection square tube (9) and the section tail upper clamping plate (6) in sequence.

2. The propulsion pod support structure for use with a submersible of claim 1, wherein: The propulsion cabin section force-bearing mandrel (1) is a hollow square tube structure with a rectangular shape, the wall thickness of the propulsion cabin section force-bearing mandrel (1) is the same, and the propulsion cabin section force-bearing mandrel (1) is sequentially provided with three flange bosses in the direction from the section bow to the section tail, wherein, The first flange boss is connected with the middle part of the section bow upper clamping plate (2) and the middle part of the section bow lower clamping plate (3) respectively, the second flange boss is connected with the middle part of the section middle upper clamping plate (4) and the middle part of the section middle lower clamping plate (5) respectively, and the third flange boss is connected with the middle part of the section tail upper clamping plate (6) and the middle part of the section tail lower clamping plate (7) respectively.

3. The propulsion pod support structure for use with a submersible of claim 1, wherein: The section bow upper clamping plate (2), the section bow lower clamping plate (3), the section middle upper clamping plate (4), the section middle lower clamping plate (5), the section tail upper clamping plate (6) and the section tail lower clamping plate (7) are all thin plate frames with a "chevron-shaped" cross section, and the left and right side notches of the "chevron-shaped" are provided with circular arc receiving tables with the same diameter.

4. The propulsion pod support structure for use with a submersible of claim 3, wherein: A recess with a rectangular cross section is arranged at the middle top of the "chevron-shaped" thin plate frame, and the propulsion cabin section force-bearing mandrel (1) is arranged in the recess.

5. The propulsion pod support structure for use with a submersible of claim 1, wherein: The internal stress of the propulsion cabin section force-bearing mandrel (1) under the cabin section load during assembly is: ； ； wherein, M is the internal stress of the propulsion cabin segment load-bearing mandrel (1) caused by the cabin segment load applied during assembly, M is the maximum bending moment at the dangerous section of the propulsion cabin segment load-bearing mandrel, M is the bending section modulus at the dangerous section of the propulsion cabin segment load-bearing mandrel, M is the short side length of the outer profile of the load-bearing mandrel section, M is the long side length of the outer profile of the propulsion cabin segment load-bearing mandrel section, M is the short side length of the inner profile of the propulsion cabin segment load-bearing mandrel section, M is the long side length of the inner profile of the propulsion cabin segment load-bearing mandrel section.

6. The propulsion pod support structure for use with a submersible of claim 1, wherein: The segment bow upper clamping plate (2), the segment bow lower clamping plate (3), the segment middle upper clamping plate (4), the segment middle lower clamping plate (5), the segment tail upper clamping plate (6) and the segment tail lower clamping plate (7) are all provided with a plurality of through channels in the thickness direction.

7. The propulsion pod support structure for use with a submersible of claim 1, wherein: The axial connection square tube (8) is a thin-walled hollow tube structure, and the cross section of the axial connection square tube (8) is a square.

8. The propulsion pod support structure for use with a submersible of claim 1, wherein: The left and right side connection square tubes (9) are thin-walled hollow tube structures, and the cross section of the left and right side connection square tubes (9) is a rectangle, wherein the long side of the rectangle is 1.5-2 times the length of the short side.

9. The propulsion pod support structure for use with a submersible of claim 1, wherein: The segment bow upper clamping plate (2), the segment bow lower clamping plate (3), the segment middle upper clamping plate (4), the segment middle lower clamping plate (5), the segment tail upper clamping plate (6) and the segment tail lower clamping plate (7) are all provided with a plurality of through channels in the thickness direction.

10. A method of assembling a propulsion pod support structure for an underwater vehicle, the method comprising: Comprise: Support the propulsion cabin segment bearing mandrel (1), and sequentially move the segment bow lower clamping plate (3), the segment middle lower clamping plate (5) and the segment tail lower clamping plate (7) to the bottom of the propulsion cabin segment bearing mandrel (1) in the bow-to-stern direction, the front panel of the segment bow lower clamping plate (3), the segment middle lower clamping plate (5) and the segment tail lower clamping plate (7) all face the segment bow direction, connect the segment bow lower clamping plate (3) with the first flange boss, connect the segment middle lower clamping plate (5) with the second flange boss, and connect the segment tail lower clamping plate (7) with the third flange boss; One end of the axial connection square tube (8) sequentially passes through the first left and right side connection square tube (9), the segment bow lower clamping plate (3), the second left and right side connection square tube (9), the segment middle lower clamping plate (5), the third left and right side connection square tube (9) and the segment tail lower clamping plate (7); The two groups of propulsion cabins of the left and right sides are symmetrically placed on the segment bow lower clamping plate (3), the segment middle lower clamping plate (5) and the segment tail lower clamping plate (7), the bosses of the propulsion cabins are arranged behind the lower clamping plates, and are fixed with the lower clamping plates through bolts; The segment bow upper clamping plate (2), the segment middle upper clamping plate (4) and the segment tail upper clamping plate (6) are sequentially arranged on the upper part of the propulsion cabin segment bearing mandrel (1) and the two groups of propulsion cabins; One end of the axial connection square tube (8) sequentially passes through the fourth left and right side connection square tube (9), the segment bow upper clamping plate (2), the fifth left and right side connection square tube (9), the segment middle upper clamping plate (4), the sixth left and right side connection square tube (9) and the segment tail upper clamping plate (6).

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