31 results about "Deep diving" patented technology

The application belongs to the technical field of hydraulic devices, and particularly relates to a deep diving oil pump oil cylinder integrated hydraulic machine and an application method thereof. The hydraulic machine comprises a hydraulic oil cylinder, an integrated power unit and a connecting structure. The integrated power unit comprises a pressure-bearing container, a motor pump group, a control valve group and an electric control system. The pressure-bearing container comprises a first chamber and a second chamber separated by a first partition structure. The containing space of the hydraulic oil forms a first communication channel and a second communication channel with the rodless chamber and the rod chamber of the hydraulic oil cylinder respectively. The electric control system controls the flow path and flow area of the hydraulic oil through the control valve group, and provides power for the flow of the hydraulic oil in the communication channel through the motor pump group. The connecting structure connects the hydraulic oil cylinder and the integrated power unit on the corresponding side of the rodless chamber and the rod chamber of the hydraulic oil cylinder respectively. Through the optimization of the spatial distribution and the flow path of the hydraulic oil by the highly integrated structure, the energy efficiency, the maintenance convenience and the reliability of the layered water intake gate of the system are improved.

A methane generation device for exploiting exposed combustible ice deposits (natural gas hydrates) on the seabed surface: It is composed of a bottom-sealed rigid pipe (4) inserted from the sea level into the seabed rock layer, and the requirements are: its diameter can be placed in a submersible pump (B) positioned in its bottom sealing position, and the outer bottom surface of its sealing position is provided with an inverted cone-shaped counterweight foundation (8) that can match the joint position of the seabed rock layer; its lower part is provided with a combustible ice fragment feed port (7) that can be connected to the end position of an underwater conveyor belt (D). The low-pressure environment of the present invention for separating methane and water relies on the influence of one atmosphere of atmospheric pressure in the water surface atmosphere space. The separated methane is finally transported to the user through the exhaust pipe (1), and the separated water is discharged to the outside by the submersible pump (B). - The present invention is set in a deep diving site for exploiting combustible ice deposits on the seabed surface similar to the open-pit coal mining method. At present, all core technologies related to deep diving equipment are at a level where they have been completely solved and perfected by the public.

The application provides a deep diving pool huge acrylic plate hoisting construction method, and belongs to the field of huge acrylic plate installation. The technical scheme is as follows: S1, transportation preparation; S2, hoisting platform building; S3, hoisting belt lashing; S4, hoisting process control; S5, file entering and installation positioning; S6, hoisting belt removal; and S7, hoisting in place. The application has the beneficial effects that the application aims at the hoisting problem of super-large volume and super-heavy acrylic plate in a limited structural space, constructs an integrated process flow of multi-point flexible lashing, track sliding, attitude control, buffer protection and the like, significantly improves the safety, stability and precision of hoisting operation, is suitable for the high-difficulty installation demand of huge transparent components in similar deep diving pools, large underwater windows and the like special scenes, and has good engineering adaptability.

The invention provides a stainless steel waterproof structure of an ultra-deep diving pool and a construction method of the stainless steel waterproof structure. Polyurethane primer covers the pool bottom and the pool wall of the ultra-deep diving pool; the polymer cement waterproof mortar covers the polyurethane primer on the pool bottom and the pool wall respectively; the stainless steel tank bottom is welded on the polymer cement waterproof mortar at the tank bottom; the stainless steel connectors and the cement overhanging piece keels are welded on the polymer cement waterproof mortar of the pool wall at intervals; the stainless steel square tubes are welded on the stainless steel corner connectors; the stainless steel tank wall plates are welded on the stainless steel square pipes, the cement hanging piece keels penetrate out of the stainless steel tank wall plates, and decorative bricks are arranged on the cement hanging piece keels penetrating out of the stainless steel tank wall plates; the decoration of the deep diving center is attractive and practical, and meanwhile, the waterproof and durability requirements in a special environment are met.

The embodiment of the invention discloses a transformation method for transforming an existing shield working well, which comprises the following steps: evaluating the shield working well, and determining transformation conditions met by the shield working well, the transformation conditions comprising a first transformation condition, a second transformation condition and a third transformation condition; under the condition that the shield working well meets the first transformation condition, the shield working well is transformed into an underground mechanical garage; under the condition that the shield working well meets the second transformation condition, the shield working well is transformed into an underground recreation and sports activity space; and under the condition that the shield working well meets the third transformation condition, the shield working well is transformed into the deep diving base. The shield working well is transformed through the method, so that the shield working well can be reutilized, the policy orientation of layered development of underground space is responded, the green development concept of resource saving and cyclic utilization is met, and secondary resource consumption caused by repeated construction of similar underground space is avoided.

The invention relates to the technical field of waste well reconstruction engineering, and provides a method and structure for reconstructing a deep diving space based on a tunnel temporary working well, and the method for reconstructing the deep diving space based on the tunnel temporary working well comprises the steps that a bottom plate is built at the bottom of the existing tunnel temporary working well, and a translation channel between the tunnel temporary working well and a main track tunnel is blocked; dividing the tunnel temporary working well into an underground middle diving area and an underground deep diving area along the depth direction of the tunnel temporary working well; a main body structure side wall is built in the underground submerged area; a cylindrical lining is built in the underground deep diving area, and backfilling reinforcement is conducted on the outer side of the cylindrical lining; the outer surfaces of the main body structure side wall and the cylindrical lining are coated with cement-based capillary crystalline paint, and a water stop strip is arranged at the junction of the underground middle diving area and the underground deep diving area; a support and a wall body are built on the ground of the tunnel temporary working well, and an overground shallow water area is defined by the support and the wall body. Reconstruction from the abandoned working well to the multifunctional deep diving space is achieved through structure transformation and function partitioning.

The invention provides a hoisting construction method for a huge acrylic plate of a deep diving pool, and belongs to the field of huge acrylic plate installation. According to the technical scheme, the method comprises the steps of S1, transportation preparation; s2, a hoisting platform is built; s3, binding with a sling; s4, hoisting process control; s5, gear entering and installation positioning are carried out; s6, the hanging belts are dismantled; and S7, hoisting in place. The device has the beneficial effects that the integrated technological process of multi-point flexible bundling, rail sliding, posture control, buffer protection and the like is constructed aiming at the hoisting problem of an ultra-large-size and overweight acrylic plate in a limited structure space, so that the safety, the stability and the precision of hoisting operation are remarkably improved; the method is suitable for high-difficulty installation requirements of giant transparent components in special scenes such as deep diving pools and large underwater windows, and has good engineering adaptability.

The invention belongs to the technical field of titanium alloy component design and processing, and particularly relates to a high-toughness impact-resistant titanium alloy and a preparation method thereof. The high-toughness impact-resistant titanium alloy is prepared from the following elements in percentage by mass: 3.9%-4.8% of Al, 3.7%-4.6% of Mo, 2.0%-2.8% of V, 3.2%-4.3% of Nb and the balance of Ti and inevitable impurity elements, and the total percentage is 100%. According to the high-strength and high-toughness impact-resistant titanium alloy and the preparation method thereof, alloy components are optimized, beta-crossing forging and strengthening and toughening heat treatment are combined, the structure form of a basket is regulated, and an alpha phase and a beta phase are subjected to coordinated deformation, so that the high-strength and high-toughness impact-resistant titanium alloy with excellent strength, fracture toughness and impact performance is obtained, and the strength and toughness matching of the high-strength and high-toughness impact-resistant titanium alloy is superior to those of existing alloys such as TC4, TC4-ELI and Ti-80; the method has a wide application prospect in the fields of deep diving equipment, aerospace and the like.

The invention relates to a composite material water ballast tank and a manufacturing method thereof, the composite material water ballast tank is suitable for a deep diving lifeboat, the composite material is adopted to form the water ballast tank, the water ballast tank adopts a built-in framework and a secondary forming shell, and the composite material has remarkable advantages in the aspect of complex shape forming compared with a metal material. The appearance of the device can fit the structural design of the outer side of a pressure-resistant shell of the deep diving lifeboat, and the utilization rate of outboard space of the deep diving lifeboat is increased. The method for preparing the water ballast tank adopts a two-time forming process, so that the overall strength of the water ballast tank is improved. According to the ballast water tank, the problem that reinforcing ribs in a small metal ballast water tank are difficult to weld is solved, and the maintenance amount in the later use process is small.

The utility model discloses an autonomous diving typhoon-preventing disaster-avoiding truss type net cage, which relates to the technical field of mariculture and comprises a plurality of main supporting columns and a culture net cage, a plurality of ballast tanks are arranged inside the plurality of main supporting columns from top to bottom, the plurality of main supporting columns are connected through netting to form the culture net cage, and the netting comprises a side net, a cover net and a bottom net. The side net is fixedly connected with the main supporting column, the cover net is fixedly connected to the upper portion of the side net, and the bottom net is fixedly connected to the lower portion of the side net. Wherein at least one ballast tank is higher than the aquaculture net cage, and the submergence depth of the aquaculture net cage is adjusted by adjusting the ballast water amount of the plurality of ballast tanks. According to the utility model, the dive of typhoons on the sea can be avoided through deep diving, so that the survival rate of cultured products is improved.

The present application relates to the technical field of cable, in particular to a cable for deep diving equipment, a cable assembly and an oil filling method, comprising: a core, two ends of the core are electrically connected to an electrical equipment and a power supply equipment respectively, the power supply equipment and the electrical equipment are arranged to be in a liquid pressure medium in a working mode; a sheath, the sheath is arranged as a hollow tubular, an inner wall of the sheath extends inwardly to form a cavity, the core is arranged to pass into the cavity, a first end of the sheath is sealingly connected to the electrical equipment, and a second end of the sheath is sealingly connected to the power supply equipment, so that the cavity forms a sealed cavity. When the ordinary cable is used in deep sea or high pressure medium, the cable is extruded and deformed by the hydraulic pressure, which causes damage to the internal structure of the cable. The cable of the present application fills oil in the sheath to balance the pressure difference between the inside and outside of the sheath, thereby solving the reliability problem of the cable in high pressure medium.

The invention discloses an autonomous diving typhoon-preventing disaster-avoiding truss-type net cage, and relates to the technical field of mariculture, the autonomous diving typhoon-preventing disaster-avoiding truss-type net cage comprises a plurality of main supporting columns and a culture net cage, the plurality of main supporting columns are internally provided with a plurality of ballast tanks from top to bottom, the plurality of main supporting columns are connected through netting to form the culture net cage, and the netting comprises a side net, a cover net and a bottom net. The side net is fixedly connected with the main supporting column, the cover net is fixedly connected to the upper portion of the side net, and the bottom net is fixedly connected to the lower portion of the side net. Wherein at least one ballast tank is higher than the aquaculture net cage, and the submergence depth of the aquaculture net cage is adjusted by adjusting the ballast water amount of the plurality of ballast tanks. According to the invention, the dive of typhoons on the sea can be avoided through deep diving, so that the survival rate of cultured products is improved.

The invention provides a large-stroke rapid-lifting composite tendon tension leg platform and a construction method thereof, and aims to solve the technical problems that an existing floating platform is poor in stability, high in tendon tensioning difficulty and low in efficiency. Comprising a floating type frame and a gravity anchor, and the floating type frame comprises an elevated platform and a deep diving floating body; the elevated platform is connected with the gravity anchor through a plurality of first tension tendons, and the first tension tendons are used for adjusting the submerging depth of the floating type frame in water; and the deep diving floating body is connected with the gravity anchor through a plurality of second tension tendons. The composite tendon tension leg platform can rapidly tension the tension tendon, the height of the platform away from water can be adjusted according to needs, and the composite tendon tension leg platform is high in stability, easy to construct and suitable for various scenes.

The present invention discloses a high-pressure and high-efficiency multistage pump driven by a shielded permanent magnet high-speed motor, comprising a motor part and a pump part, wherein the motor part is connected to the pump part; wherein the motor part comprises a motor base, a bottom cover is provided on the lower side of the motor base, a rotor shaft is rotatably provided in the motor base, a rotor is connected to the side wall of the rotor shaft, a magnetic steel and a stainless steel sleeve are provided on the outer side of the rotor in sequence, a housing is connected to the motor base, a DC high-speed coil is connected to the inner wall of the housing, a motor end cover is provided on the upper side of the DC high-speed coil, a stainless steel thin-wall shielding sleeve is provided on the side of the DC high-speed coil close to the stainless steel sleeve, and a filling cavity is formed between the motor base, the housing, the motor end cover and the stainless steel thin-wall shielding sleeve. The present invention improves the head of the multistage pump by arranging a shielded structure outside the multistage pump motor, and at the same time makes the multistage pump not limited by the diving pressure, can be used in deep diving, can also increase the rotation speed, reduce the number of impellers, and ensure the overall stability and durability.

A kind of seawater pump for large-depth submersible buoyancy adjustment and working process, including pump head, opening one ladder hole, two ladder holes and three ladder holes, the end of one ladder hole is orthogonal and has water inlet and water outlet, water inlet and water outlet are connected with corresponding flow valve respectively;The end of pump head is fitted with shell, the inside of the connection of shell and pump head is installed with combined plunger, one end of combined plunger is articulated connecting rod and crank;High-pressure water seal is installed at two ladder holes, the inner ring of high-pressure water seal is matched with the outer ring of ceramic plunger, connecting ring is installed at three ladder holes and shell simultaneously, connecting ring is composed of copper ring and steel ring, steel ring is sealed with shell by sealing ring, oil-water isolation seal and copper ring are installed in the inside of steel ring, the end surface of steel ring is installed with baffle matched with shell;It can work in large-depth manned submersible buoyancy adjustment working condition, meet the use requirement.

The application provides a composite tendon tension leg floating breakwater. The technical problem of poor stability and easy overturning of the existing floating breakwater under extreme weather such as strong wind and large wave is solved. The composite tendon tension leg floating breakwater comprises an elevated platform, a deep diving float and a gravity anchor arranged in sequence from top to bottom; the elevated platform and the deep diving float respectively comprise a plurality of platform plates and a plurality of float segments which are sequentially spliced along a preset path of the breakwater, the gravity anchor comprises a plurality of anchor blocks which are respectively and alternately arranged on both sides of the elevated platform, and the two sides of the platform plate are connected with the anchor blocks on both sides through first tension tendons. The elevated platform is provided with a plurality of net grating plates for wave prevention on at least one side. The elevated platform is tensioned through the tension tendons symmetrically arranged on both sides, and the stability of the floating breakwater is high and the floating breakwater is not easy to overturn.

The invention belongs to the field of submarine body structure design, particularly relates to a layer gap pressure regulating type submarine structure adapting to ultra-deep-sea pressure, and aims to improve the pressure resistance and impact resistance of a submarine in a deep-sea high-pressure environment and increase the diving depth of the submarine. The interlayer gap type submarine structure comprises a high-strength shell, an elastic layer, supporting ribs and a pressure regulating cavity formed by interlayer gaps. The elastic layer is arranged between the high-strength shells, so that vibration and noise can be effectively absorbed. High-pressure gas or liquid is injected into the pressure regulating chamber, so that the anti-pressure capability of the submarine structure can be greatly improved; ribs are further arranged between different shell layers so as to improve the integrity of the structure, and the ribs can also play a role in isolating the pressure regulating cavity. And a pressure regulating pipeline can be arranged in the rib. By increasing the number of layers, the layer gap type submarine structure can meet the requirement for myriameter-level deep diving and has good adaptability and safety redundancy.

The application relates to the technical field of waste well reconstruction engineering, and provides a method and structure for reconstructing a deep diving space based on a tunnel temporary working well, the method for reconstructing the deep diving space based on the tunnel temporary working well comprising the following steps: building a bottom plate at the bottom of an existing tunnel temporary working well, and blocking a translation channel between the tunnel temporary working well and a main line tunnel; dividing the tunnel temporary working well into an underground medium diving area and an underground deep diving area along the depth direction of the tunnel temporary working well; building a main body structure side wall in the underground medium diving area; building a cylindrical lining in the underground deep diving area, and backfilling and reinforcing outside the cylindrical lining; brushing cement-based permeable crystalline paint on the outer surfaces of the main body structure side wall and the cylindrical lining, and arranging a water stop strip at the junction between the underground medium diving area and the underground deep diving area; building a support and a wall on the ground of the tunnel temporary working well, and enclosing an aboveground shallow water area by using the support and the wall. Through structure conversion and function partition, the reconstruction from the abandoned working well to the multifunctional deep diving space is realized.

The utility model discloses a welding device for decoration of an ultra-deep diving pool, which comprises a support plate, a welder, an adjusting assembly, a positioning assembly, a telescopic piece, a rotating rod and a mounting block, when the device is used, the adjusting assembly can drive a rotating shaft to rotate, the rotating shaft rotates to drive a threaded rod to rotate, and the threaded rod rotates to drive a threaded block to move; a first threaded block moves to drive a mounting plate on one side, the mounting plate moves to drive a welding device at the bottom to move, then the height of the welding device can be adjusted, so that the welding device can weld decorative sculptures and instruments with different heights in a submersible pool, and after the welding device is adjusted to the proper height, a telescopic component drives a mounting block to slide, so that the welding device can weld the decorative sculptures and instruments. According to the welding device, the welding device moves towards the position close to a welding point, in the welding process, the arranged telescopic piece can adjust the angle of the welding device, the welding range is widened, in the welding process, the dust collector absorbs generated harmful gas through the arranged dust collection head, and then the health of constructors is protected.

The invention relates to a seabed pumped storage system and a working method and a maintenance method thereof. The system comprises an energy storage shell, a low-pressure cavity is formed after seawater is pumped out of the shell, and gravitational potential energy is stored through the difference between external deep sea hydrostatic pressure and internal low pressure; the energy storage sleeve is detachably connected with the energy storage shell in a sealed mode through a flange. A breather pipe and a water conveying pipeline are integrated in the energy storage sleeve. The deepwater ball valve, the reversible water pump / water turbine and the coaxial motor / generator are sequentially arranged from top to bottom in the axial direction of the water conveying pipeline. Under the energy storage working condition, the unit in the energy storage sleeve discharges seawater in the shell to deep sea, and energy storage is completed; under the energy release working condition, high-pressure seawater flows back to drive the water turbine to generate electricity. When the system is maintained, a sea surface work ship vertically pulls the whole set of cylinder to a deck through a hoisting system, core component maintenance or whole replacement is completed in a normal pressure environment and then reinstallation is performed, and deep diving operation is not needed. In-situ large-scale energy storage of the deep and far sea renewable power supply is realized, and the operation and maintenance cost and risk are remarkably reduced.

1. The name of this design product: Deep diving mask. 2. Application of this design product: for diving mask. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The application provides an optical microcavity FPGA miniaturized narrow linewidth laser optical multimodal locking system, wherein components in the system are connected through FPGA logic, and the system comprises the following components: a first high-speed digital-to-analog converter, an electro-optical modulator, a WGM optical microcavity, a photodiode, an analog-to-digital converter, a PID servo module, a second high-speed digital-to-analog converter and a channel control end. The components are used to process a modulation signal, and finally output a corresponding analog signal in combination with a local oscillator signal. Finally, the analog signal is used for feedback to automatically adjust the frequency and phase of the laser and the optical characteristics of the WGM optical microcavity. Through the application, the defects of the prior art, such as poor anti-interference ability of a single-mode system and an analog system, inability to achieve optimal locking effect, realization of stable control of the system and inability to be configured online, are overcome, and the application in the narrow linewidth laser system in unmanned narrow linewidth laser systems such as deep space, deep diving and deep earth is limited.

The invention discloses a method for avoiding operation interference between a deep diving hydraulic machine and an oil cylinder hinged support. The method comprises the following steps that the swing area of the center line of an oil cylinder during full-stroke operation of the deep diving hydraulic machine is determined according to the operation track of the center of a connecting lifting point of the deep diving hydraulic machine and a movable valve clack; the deep diving hydraulic machine is arranged and lofted according to the limiting position of the swing area of the center line of the oil cylinder; an oil cylinder hinged support structure meeting the requirement for a center line swing area of an oil cylinder of the deep diving hydraulic machine and layout setting-out is arranged. According to the method, operation interference between the deep diving hydraulic machine and the oil cylinder hinged support can be avoided, the operation reliability of the stepless layered water intake gate device is effectively improved, and the environment-friendly effect of layered water intake is guaranteed.

The invention relates to a deep diving lifeboat redundant navigation control system, which comprises a console, a control panel module, a main control unit, a network switch, a PLC module, a serial port server and a slave control module, and is characterized in that the control panel module is connected with a coil of a panel switching relay, and a common end of the panel switching relay is connected with an analog quantity signal input end of a propeller module; a normally open contact of the panel switching relay is connected with the console, a normally closed contact of the panel switching relay is connected with a common end of the signal switching relay, a coil of the signal switching relay is connected with a relay control signal output end of the slave control module, and a normally closed contact of the signal switching relay is connected with an analog quantity signal output end of the PLC module. And a normally open contact of the signal switching relay is connected with an analog quantity signal output end of the slave control module. Redundancy from manipulation, control, signal transmission to execution of total elements can be realized, the reliability of navigation control is greatly improved, and successful rescue is ensured.

The invention relates to the technical field of chip imaging, and discloses a deep periscopic waveguide imaging method and system, and the method comprises the steps: determining the focus position of a historical chip image through a focusing judgment algorithm; comparing the focus position with a preset focus position threshold range, and taking a historical chip image corresponding to the focus position as a training set image when the focus position is within the preset focus position threshold range; training the defocusing amount judgment model by using the training set image to obtain a trained defocusing amount judgment model; obtaining a target chip image, and inputting the target chip image into the defocusing amount judgment model to obtain the defocusing amount of the target chip image; and comparing the defocusing amount with a preset defocusing amount range, outputting a target chip image when the defocusing amount is within the preset defocusing amount range, constructing an image correction algorithm when the defocusing amount is outside the preset defocusing amount range, correcting the target chip image by using the image correction algorithm, and outputting the corrected target chip image.

1. Name of the designed product: fishing lure (deep diving minnow) 2. Use of the designed product: fishing tackle for fishing 3. Design points of the designed product: in shape 4. Picture or photo best indicating the design points: perspective view

The utility model relates to the technical field of hydraulic devices, in particular to a power unit and oil cylinder connecting structure for a deep submersible oil pump oil cylinder integrated type hydraulic machine, which comprises two groups of connecting components and a pipe body, the connecting assemblies are arranged on the corresponding sides of a rodless cavity and a rod cavity of the oil cylinder correspondingly and used for connecting the oil cylinder and the power unit. Each connecting assembly is provided with an oil way channel and a line channel which are independent of each other, one end of the oil way channel is communicated with an oil way in the power unit, and the other end of the oil way channel is communicated with a rodless cavity or a rod cavity of the oil cylinder through an oil passing opening in the oil cylinder. The line channels are used for containing lines from a power unit and / or an oil cylinder, the pipe body is hollow, and the two ends of the pipe body are in butt joint with ports or the middle of the line channels on the two sides respectively. The integration degree is greatly improved through the two connecting assemblies and the two pipe bodies, meanwhile, independent arrangement space is provided for the oil way channel and the line channel, the leakage risk is reduced, the sealing performance and the working stability of the system are improved, and overhauling and maintaining are convenient.

The application provides a simulation method and system for deep water explosion impact resistance of a large-depth underwater vehicle, and the method comprises the following steps: obtaining underwater vehicle external geometric data and target structure region, and obtaining structure material parameters; calculating a deep diving static water pressure, an equivalent static pressure distribution of the target structure region, and establishing a prototype simulation model and a scale-down test model; performing a test to obtain simulated structure surface pressure, simulated structure strain time curve, simulated bubble motion trajectory and scale-down strain data; based on the above data, constructing a static water pressure term, an impact wave and a bubble pulsation pressure time term, and superimposing and constructing a joint load simulation model, and then obtaining an error, and if the condition is met, the simulation is completed. The simulation method for deep water explosion impact resistance of the large-depth underwater vehicle can dynamically couple high static water pressure, underwater explosion shock wave and bubble pulsation, so as to realize precise simulation of the deep water explosion impact load resistance of the large-depth underwater vehicle structure.

This utility model discloses a stern shaft sealing structure for underwater submersion, including a stern shaft rotatably supported within a stern tube. An external sealing device is provided at the extended end of the stern tube, comprising a sealing sleeve fixedly connected to the stern shaft and a stern shaft sealing seat mounted on the stern tube. An oil sealing ring and a lip-type water sealing ring are respectively installed on the inner and outer sides of the stern shaft sealing seat. A sealing ring support ring is movably disposed inside the water sealing ring, with one side of the support ring fitting against the back side of the water sealing ring and the other side connected to a support ring piston. The support ring piston is sealed within an annular piston cavity on the stern shaft sealing seat, and the inner cavity of the annular piston cavity communicates with the outside of the stern shaft sealing seat. The underwater stern shaft sealing structure of this utility model can support the elastic sealing body of the stern shaft lip-type sealing ring to prevent the sealing lip from overturning and deforming during deep diving. Furthermore, the strength of its supporting effect varies with the diving depth, maintaining a good sealing effect.

The invention discloses a large diving depth vehicle filled with liquid between boards, and belongs to the technical field of underwater vehicles, a first sealing cavity is formed in a shell, the shell is made of a hard material, a plurality of openings penetrating through the shell are formed in the shell, elastic shells are arranged in the openings, and a driving mechanism is fixedly installed on the shell. The inner shell is fixedly installed in the first sealing cavity, a middle layer is formed between the inner wall face of the first sealing cavity and the outer wall face of the inner shell, and the middle layer is filled with first fluid; and a second sealing chamber is arranged in the inner shell. The large-diving-depth aircraft filled with the liquid between the boards can adapt to the large-diving-depth operation environment, key equipment in the aircraft can be effectively sealed, and it can be ensured that the aircraft can form self-adaptive compensation for compressive deformation of an external structure in the large-diving-depth environment; and the production and preparation cost is remarkably reduced while stable operation of the aircraft is ensured.