The "Struggle" all-sea deep manned submersible, which successfully completed the 10,000-meter deep dive sea trial mission, returned to Sanya on the 28th. Many Chinese advanced materials and technology companies participated in the "Struggle" development and sea trial missions. They said in an interview with the media that the acoustic system has achieved a series of key technological breakthroughs such as the complete localization of the acoustic system and the independent development of 10,000-meter-level buoyancy materials. "Zhe" has played an important role in realizing manned deep diving of 10,000 meters.
"Struggle" acoustic system is fully localized
ZKY Institute of Acoustics is the project lead unit of the "Full-sea Deep Submersible Acoustic Technology Research and Equipment Development" under the key special project of "Key Deep-sea Technology and Equipment" and the "Overall Design, Integration and Sea Test of Full-Sea Deep Manned Submersible" project The undertaking unit of the Chinese Acoustic System subject, the Marine Acoustics Technology Center team led by Researcher Zhu Min is responsible for completing the full-sea deep-water acoustic communicator, terrain and landform detection sonar, multi-beam forward-looking sonar, Dopper in the "Struggle" acoustic system Independent research and development of Le speedometer, collision avoidance sonar, and system integration of positioning sonar and inertial navigation equipment.
Zhu Min pointed out that, compared to the previous two generations of the "Jiaolong" and "Deep Sea Warrior" manned submersibles, the "Struggle" acoustic system has been fully localized, breaking through the deep seas and having higher technical indicators. , Has performed well during the entire sea trial of the Struggle, providing reliable technical support for continuous cruise operations in the entire sea depth.
Among them, the underwater acoustic communication is the only bridge between the "Struggle" and the mother ship "Explore One", realizing the real-time transmission of text, voice and images of the submersible from the 10,000-meter sea floor to the mother ship.
According to reports, the integrated navigation system integrated with acoustic Doppler speedometer, positioning sonar and inertial navigation equipment provides high-precision underwater positioning and navigation for the cruising operations of the Struggle. During the dive operation on November 16, with the help of the integrated navigation system and sonar equipment, the Submariner of the Struggle successfully retrieved the three underwater samplers placed on the seabed of 10,000 meters in only half an hour. Successfully realized "finding the needle on the seabed", and transmitted the sampling screen back to the mother ship through the hydroacoustic communicator.
A major breakthrough in the independent research and development of 10,000-meter buoyancy materials
The role of solid buoyancy materials is to provide guarantee for the smooth diving and safe floating of submersibles. Its performance is directly related to the safety of submersibles and submariners, and is also the core material for many deep-sea scientific investigation equipment and the realization of marine resource development.
During the development and production of deep solid buoyancy materials in the sea, the core technical problem is to solve the synergistic relationship between the density and strength of the material, which requires both low density and high water pressure resistance.
To this end, ZKY took the lead in launching an independent research and development project of 10,000-meter-level buoyancy materials. Based on years of technical accumulation in the early stage, using soft chemical preparation technology with independent intellectual property rights, the core raw material of solid buoyancy materials, high-strength hollow glass micro Ball, to achieve a major breakthrough in the research of buoyancy materials in China, and then use dense packing technology combined with light-weight high-strength resin substrates to prepare 10,000-meter-class solid buoyancy materials with high safety factors and mass production, which solves the problem of domestic solid The buoyant material has poor strength and high density technical problems.
ZKY also carried out the evaluation of the performance of buoyant materials under high pressure in the simulated deep sea and the bonding processing of large-scale components. At the same time, in order to promote the sustainable development of solid buoyancy materials, the project team of the institute has also deployed basic research and organized relevant units to carry out research on related basic scientific issues related to buoyancy materials.
Titanium alloy Ti62A submersible manned cabin
The research and development team of China SXBT Titanium Alloy Technology Group revealed the fatigue failure mechanism of titanium alloy Ti62A used in the "pressure cabin" of deep-sea manned submersibles. It was found that at lower frequencies, as the loading frequency increases, the fatigue life increases The load-lifting/decreasing time significantly reduces the load-guaranteed fatigue life of the titanium alloy Ti62A used in the "pressure chamber", and the relationship between the load-holding fatigue life and the load-up/down time is approximately linear under the double logarithmic coordinate. At the same time, the institute has also studied and established a model reflecting the influence of load forms and gaps on the fatigue performance of titanium alloy Ti62A for pressure cabins.