WO-2026092343-A1 - MANUFACTURING METHOD AND SYSTEM FOR IMPLOSION-PROTECTED SPHERICAL PRESSURE-RESISTANT STRUCTURE SUITABLE FOR DEEP-SEA SUBMERSIBLE

WO2026092343A1WO 2026092343 A1WO2026092343 A1WO 2026092343A1WO-2026092343-A1

Abstract

The present invention relates to the field of deep-sea submersibles, and provides a manufacturing method and system for an implosion-protected spherical pressure-resistant structure suitable for a deep-sea submersible, comprising: implementing manufacture of an implosion-protected spherical pressure-resistant structure by a compression molding method, and implementing performance testing from two aspects, namely performance indicators of the structure itself and a protection effect under a simulated deep-sea environment. The present invention overcomes the problem that it is difficult for traditional methods to satisfy manufacturing requirements. By means of the described method, manufacture of an implosion-protected pressure-resistant structure suitable for a deep-sea submersible can be achieved, meeting requirements for roundness, smoothness, fitting degree, and structural performance. Through experimental testing, the improved implosion protection effect of the pressure-resistant structure is visually verified, thereby laying a foundation for practical application to a submersible. The present invention has great significance to the design and manufacture of deep-sea submersibles.

Inventors

ZHAO, MIN
Zhang, Xinyu
SUN, Shengxia

Assignees

上海交通大学

Dates

Publication Date: 20260507
Application Date: 20251027
Priority Date: 20241029

Claims (10)

A method for manufacturing an implosion-protective spherical pressure-resistant structure suitable for deep-sea submersibles, characterized by manufacturing the structure through compression molding, specifically including the following steps: Step S1: Prepreg cutting; Step S2: Prepreg laying; Step S3: Pre-vacuum treatment; Step S4: Polishing treatment; Step S5: Performance testing; Step S5 includes: performance testing from two aspects: the performance indicators of the structure itself and the protective effect in a simulated deep-sea environment; the performance indicators of the structure itself include the roundness, smoothness and fit of the overall structure.
The manufacturing method of the implosion-resistant spherical pressure-resistant structure suitable for deep-sea submersibles according to claim 1, characterized in that step S1 includes: The prepreg is cut and laid in eight equal parts; multiple layers are laid, with the number of layers n ranging from 5 to n to 10. The roundness of the overall structure is ensured by gradually increasing the cut area S of each layer. The cut area S1 of the first layer of prepreg closest to the lining is: The cut area Sn of the eight equal parts of prepreg close to the nth layer of the lining is: Where r is the radius of the inner hollow sphere, n is the total number of prepreg layers, and N is the total thickness of the prepreg layers.
The manufacturing method of the spherical pressure-resistant structure for implosion protection of deep-sea submersibles according to claim 1 is characterized in that step S2 includes: first uniformly applying epoxy resin to the inner lining, and then laying the prepreg.
The manufacturing method of the spherical pressure-resistant structure for implosion protection of deep-sea submersibles according to claim 1 is characterized in that a hydrostatic pressurization method is used to simulate the pressure under deep-sea working conditions; Let the actual operating water depth of the deep-sea submersible be h. Then, the hydrostatic pressure P_water around the pressure-resistant structure under the operating water depth condition is: P_water = ρgh Where ρ is the fluid density and g is the gravitational acceleration; The experimental hydrostatic pressure P<sub> test </sub> reached by hydrostatic pressurization is: P test = P water This simulates the pressure under actual working conditions in the deep sea.
The manufacturing method of the spherical pressure-resistant structure for implosion protection of deep-sea submersibles according to claim 4 is characterized in that, for the spherical pressure-resistant structure for implosion protection of deep-sea submersibles, if the dynamic pressure peak value captured by the pressure sensor is P result1 , then the actual pressure peak value P max1 is: P max1 = P test + P result1 Where P test is the experimental hydrostatic pressure reached by hydrostatic pressurization; For a spherical structure with the same lining, if the peak dynamic pressure captured by the pressure sensor is P result2 , then the actual peak pressure P max2 is: P_max2 = P_test + P_result2 The effectiveness of implosion protection is evaluated using the peak pressure reduction rate α, calculated using the following formula: The greater the peak pressure reduction rate 'a', the better the implosion protection effect.
A manufacturing system for an implosion-protective spherical pressure-resistant structure suitable for deep-sea submersibles, characterized in that the implosion-protective spherical pressure-resistant structure is manufactured by compression molding, specifically including the following modules: Module M1: Prepreg cutting; Module M2: Prepreg laying; Module M3: Pre-vacuum treatment; Module M4: Polishing treatment; Module M5: Performance testing; The module M5 includes: performance testing from two aspects: the performance indicators of the structure itself and the protective effect in a simulated deep-sea environment; the performance indicators of the structure itself include the roundness, smoothness and fit of the overall structure.
The manufacturing system for the implosion protection spherical pressure-resistant structure suitable for deep-sea submersibles according to claim 6, characterized in that the module M1 comprises: The prepreg is cut and laid in eight equal parts; multiple layers are laid, with the number of layers n ranging from 5 to n to 10. The roundness of the overall structure is ensured by gradually increasing the cut area S of each layer. The cut area S1 of the first layer of prepreg closest to the lining is: The cut area Sn of the eight equal parts of prepreg close to the nth layer of the lining is: Where r is the radius of the inner hollow sphere, n is the total number of prepreg layers, and N is the total thickness of the prepreg layers.
The manufacturing system for the implosion protection spherical pressure-resistant structure for deep-sea submersibles according to claim 6 is characterized in that the module M2 includes: first uniformly applying epoxy resin to the inner lining, and then laying the prepreg.
The manufacturing system for the implosion protection spherical pressure-resistant structure suitable for deep-sea submersibles according to claim 6 is characterized in that it uses hydrostatic pressurization to simulate the pressure under deep-sea working conditions; Let the actual operating water depth of the deep-sea submersible be h. Then, the hydrostatic pressure P_water around the pressure-resistant structure under the operating water depth condition is: P_water = ρgh Where ρ is the fluid density and g is the gravitational acceleration; The experimental hydrostatic pressure P<sub> test </sub> reached by hydrostatic pressurization is: P test = P water This simulates the pressure under actual working conditions in the deep sea.
The manufacturing system for the implosion-protective spherical pressure-resistant structure suitable for deep-sea submersibles according to claim 9 is characterized in that, for the implosion-protective spherical pressure-resistant structure suitable for deep-sea submersibles, if the dynamic pressure peak value captured by the pressure sensor is P result1 , then the actual pressure peak value P max1 is: P max1 = P test + P result1 Where P test is the experimental hydrostatic pressure reached by hydrostatic pressurization; For a spherical structure with the same lining, if the peak dynamic pressure captured by the pressure sensor is P result2 , then the actual peak pressure P max2 is: P_max2 = P_test + P_result2 The effectiveness of implosion protection is evaluated using the peak pressure reduction rate α, calculated using the following formula: The greater the peak pressure reduction rate 'a', the better the implosion protection effect.

Description

Manufacturing method and system for spherical pressure-resistant structures for implosion protection of deep-sea submersibles Technical Field This invention relates to the technical field of manufacturing and performance testing of deep-sea pressure-resistant structures, specifically, to a method for manufacturing an implosion-protective spherical pressure-resistant structure suitable for deep-sea submersibles. Background Technology As an essential technical equipment for exploration, the deep-sea submersible's pressure-resistant structure, a crucial component, ensures the safety of personnel and equipment. To further develop deep-sea resources, advanced deep-sea submersibles are needed to complete exploration missions. However, the high-pressure working environment of the deep sea places high demands on the pressure resistance of the structure, and the huge pressure difference between the inside and outside of the hollow spherical structure poses a risk of implosion. During implosion, the hydrostatic pressure of the flow field is converted into fluid kinetic energy. When the airflow compresses the internal air cavity to its minimum, the internal air will rebound outward, generating a shock wave far exceeding the environmental pressure, causing catastrophic consequences. Therefore, multiple factors need to be considered when designing and manufacturing deep-sea submersibles. In terms of design and material selection, combining two materials and laying fiber prepreg on the outside of the pressure-resistant liner can achieve implosion protection while meeting the pressure-bearing function of the deep-sea submersible. Regarding structural morphology, a spherical structure, due to its perfectly symmetrical geometry, can evenly distribute the external force of water across the structure, and is considered the ideal shape for the flotation device of a deep-sea submersible. Therefore, using a spherical pressure-resistant structure combining prepreg and liner on actual submersibles is considered a good solution. However, the requirements of the deep-sea working environment for an ideal hollow sphere are difficult to meet with conventional manufacturing methods. In traditional processing methods, carbon fiber winding requires a fulcrum; however, for a spherical pressure-resistant structure, the location of the fulcrum is difficult to find, making it difficult to control the roundness of the overall structure. At the same time, the adhesion between the liner and the prepreg, and between the prepreg layers, as well as the smoothness of the overall structure, are also challenges that remain to be solved in previous processing methods. Furthermore, since this spherical pressure-resistant structure is intended for deep-sea submersibles, it first needs to have pressure resistance to meet the pressure requirements of the deep-sea working environment. Additionally, the structure itself must also have protective performance in the event of a deep-sea implosion. In summary, it is necessary to propose a manufacturing method for an implosion-resistant pressure-resistant structure suitable for deep-sea submersibles. This method should meet the requirements of the deep-sea working environment, as well as the structural requirements for roundness, smoothness, fit, and protective performance. Furthermore, the manufactured structure should be tested according to requirements to achieve overall performance evaluation. This solution has significant engineering reference value for the design and manufacture of deep-sea submersibles. Existing Chinese patent application CN117465640A discloses a lightweight composite spherical pressure-resistant structure and a deep-sea submersible for deep-sea implosion protection. The structure includes a hollow ceramic sphere liner and a CFRP outer layer, with the CFRP outer layer covering the outer surface of the hollow ceramic sphere liner. The two components together form a ceramic-CFRP composite spherical pressure-resistant structure. However, this patent only proposes a novel structural concept; it does not provide a manufacturing method for the structure, nor does it produce a physical prototype or propose a set of testing and inspection methods for the structure. The existing design has the following drawbacks: during actual manufacturing, the hollow ceramic sphere liner and the CFRP outer layer are not tightly bonded; the CFRP outer layer becomes uneven due to fiber bundle entanglement; and the overall roundness of the structure is difficult to control. Furthermore, because this structure is intended for use in deep-sea submersibles, characterized by high environmental pressure and a high risk of implosion, these shortcomings will significantly impact the final performance. Additionally, after manufacturing, a corresponding performance testing plan is needed to evaluate the structural performance. However, there is currently no experimental testing plan specifically addressing the pressure-resi