12results about How to "Improve hydrodynamic performance" patented technology

The invention discloses an underwater vehicle head structure capable of slowly releasing a drag reducer, and belongs to the field of underwater drag reduction of vehicles. Comprising a head cone section and a head circular truncated cone section which are coaxially and fixedly connected, one end of the head circular truncated cone section is in sealed connection with the head cone section, a cavity structure for containing a drag reducer solution is arranged at the joint, and the other end of the head circular truncated cone section is in sealed connection with a navigation body middle section; the head cone section is a rotary body porous medium which is close to a cone, the cone vertex of the head cone section is a molded line stagnation point which forms a conical molded surface, the axial height at the stagnation point is the largest, and the axial thickness is in a change rule of gradually decreasing from the stagnation point to the edge of the bottom end. The defects that in the prior art, a drag reducer solution cannot evenly wrap the whole vehicle, and the integrity of a shell of the vehicle is greatly damaged when the drag reducer is released are overcome.

The invention relates to a flexible connecting device between floating type photovoltaic floater modules, which comprises a connecting rod, and the head end part of the connecting rod is connected with the tail end part of one photovoltaic floater module in a relative rotation manner along the vertical direction; the tail end part of the connecting rod is connected with an external connecting rod fixed at the head end of the other photovoltaic floater module through a lengthened hoop; the connecting rod is a composite rod piece with the inner portion being rigid and the outer portion being flexible and / or an elastic connecting structure capable of achieving axial and radial deformation is arranged between the tail end of the connecting rod and the head end of the external connecting rod. Through rotation of the single hinge at the head end, the bending moment load caused by relative rotation between the floater modules is reduced, so that the structural safety of the floatable photovoltaic device is improved; through stretching, compression and bending of the elastic connecting structure at the tail end, the load generated by relative movement of the floater modules on the horizontal plane is reduced; the inherent rigidity of the connecting device can reduce the relative rotation angle between the floater modules to a certain extent, and the overall stability of the floating photovoltaic device can be improved.

The invention discloses a marine empennage, which relates to the technical field of ships, and comprises a ship shell of a wave-shaped flat bottom structure, and the upper end of the ship shell is fixedly connected with a deck used for covering the space in a ship and horizontally dividing the space into layers; the side, close to a deck, of the hull is fixedly connected with a cabin used for storing materials and allowing sailors to work and live, the outer wall of the side, away from the cabin, of the hull is fixedly connected with an empennage plate body used for keeping course stability and providing rotation or trim adjusting capacity, and dynamic wingspan expansion mechanisms are arranged on the two sides of the upper end of the empennage plate body. An arc wing guide swing mechanism is arranged at the center of the upper end of the empennage plate body, a trapping screen wing mechanism is arranged on one side of the tail end of the empennage plate body, plate wings and an electric telescopic rod are matched with each other, and the stress area of the empennage can be increased by improving the sailing performance and expanding the wingspan; therefore, larger lift force is generated under the condition of the same wind speed or water flow.

The utility model discloses a five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device, the main body structure of the five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device is a lower sealing occlusion ring and an upper sealing occlusion ring which are occluded up and down, and the five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device comprises the lower sealing occlusion ring and the upper sealing occlusion ring, a pentagram-shaped occlusion groove is formed in the bottom surface of the upper sealing occlusion ring, the pentagram-shaped occlusion groove and the pentagram-shaped occlusion convex teeth are mutually occluded and clamped, and newly synthesized difluoro vulcanized phenyl silicone rubber is adopted as a main body material. Through the arrangement of the lower sealing occlusion ring and the upper sealing occlusion ring, close fit of the lower sealing occlusion ring and the upper sealing occlusion ring can be achieved, the occlusion surface is of a five-pointed star-shaped three-dimensional structure distributed in the radial direction, the structure has good impact resistance and scouring resistance, the overall structure is simple in process, installation is convenient, the service life is long, and the service life is long. The stable sealing performance of the sealing device in a high-temperature and hydrogen sulfide environment is ensured, and medium leakage is prevented.

The invention provides a propeller phase synchronous measurement device and method based on U-NET feature recognition, and belongs to the technical field of flow field measurement, and the device comprises a test water tank, a to-be-measured object is installed in the test water tank, the four sides of the test water tank are provided with light-transmitting windows, and optical observation and measurement are carried out; the feature capture high-speed camera is arranged on a window on any side of the test water tank, and the water prism is arranged on a window of an observation surface of the test water tank where the feature capture high-speed camera is located; the active control processing system controls synchronous triggering of the feature capturing high-speed camera and the measuring equipment through the synchronous signal controller and records collected data. According to the invention, the characteristic capturing high-speed camera after algorithm learning is used for accurately positioning and outputting required phase angle information, so that the purpose of testing and measuring a flow field at a certain specific angle is achieved; and an indispensable data basis is provided for verifying and improving related unsteady flow physical models, optimizing hydrodynamic performance of fluid machinery and inhibiting flow instability.

The invention relates to the technical field of UUV sound array platforms, in particular to a transverse low-resistance wing type multi-element sound array platform for a UUV, the sound array platform is installed on the UUV, the front end of a wing is designed to be in a linear shape and contracts to the cabin section face of the UUV, it is guaranteed that the platform has better stability and follow-up performance when moving in water, flow noise is reduced, and the stability of the platform is improved. The array frame and the acoustic array are in flexible connection, and it is guaranteed that transmitted acoustic signals are not distorted.

The utility model discloses a multi-mode wave-propelled unmanned aircraft wing-body fusion navigation body, which relates to the technical field of unmanned aircrafts, and comprises a navigation body main body, and the navigation body main body comprises an outer skin, an internal skeleton and a solid buoyancy material filled in the internal skeleton; the appearance of the navigation body main body adopts a wing body fusion design; the wing section of the navigation body main body adopts an NACA asymmetric wing section; the upper surface of the navigation body main body is designed into a curved surface with an integrated functional unit; a part of components of the dynamic buoyancy adjusting module are integrated in the head section of the navigation body main body; a watertight instrument cabin mounting space is integrated in the middle section of the navigation body main body; an emergency load rejection device mounting space is integrated below the tail section of the navigation body main body; and stabilizing wings are arranged below the tail end of the navigation body main body. The multi-modal wave-propelled unmanned aircraft wing body fusion navigation body has the advantages of high hydrodynamic efficiency, optimized wave energy capture performance, good structural integration and capability of supporting multi-modal navigation.

This invention discloses a sole and a skeleton boot. The sole has a sole surface at its bottom, and a heel surface is formed at the heel of the sole. The heel surface includes a first curved surface, a recessed portion, and a second curved surface distributed sequentially from back to front along the front-rear direction of the sole. The first curved surface is configured such that at least a portion of its surface is the windward side when the athlete is in a prone position. The second curved surface is configured to always be the leeward side when the athlete is in a prone position. The recessed portion is located between the first and second curved surfaces along the front-rear direction of the sole and is recessed towards the upper part of the sole relative to the first and second curved surfaces. The skeleton boot includes the aforementioned sole and a sole surface fixed to the sole, and has better hydrodynamic properties, which can reduce wind resistance when the athlete is moving.

The present application relates to a kind of hydraulic weight cock valves for X flow channel pump station, belong to water channel control equipment technical field, including shell, with lower flow channel, left flow channel and right flow channel, the shell is equipped with with lower flow channel, left flow channel and right flow channel Communication three-way pipeline is equipped;Valve core, installation in the three-way pipeline inside and with its rotating connection;The valve core is equipped with two-way pipeline, when valve core rotates in shell, two-way pipeline cooperates the three-way pipeline of shell and forms left pass position, interruption position and right pass position respectively;Driving element, for driving valve core rotation to realize the switching of left pass position, interruption position and right pass position.The hydraulic weight cock valve of the present application compared with the arrangement scheme of traditional 2 butterfly valves plus 2 flap valves or 2 gate valves plus 2 quick opening and closing machines on X flow channel upper layer, uses 1 piece of equipment to replace 4 pieces of equipment, reduces the number of equipment, reduces construction cost and operating cost, and has high reliability.

The utility model discloses a hidden folding and unfolding wing mechanism for an air-drop underwater glider, which belongs to the technical field of ocean exploration equipment and comprises an axial linear moving module, a rear seat body, a folding and unfolding wing, a hydrostatic pressure releaser and an energy storage spring. The axial linear moving module comprises a sliding rod and a connecting rod sliding block; a sliding hole is formed in the rear seat body; the front portions of the inner sides of the folding and unfolding wings are hinged to the connecting rod sliding blocks through pin shafts, sliding columns are installed on the front portions of the inner sides of the folding and unfolding wings, the sliding columns are assembled in the sliding holes, and the sliding columns move to the front portions and the rear portions of the sliding holes to enable the folding and unfolding wings to be in an unfolded state and a folded state respectively. The hydrostatic pressure releaser is installed on the rear seat body and locks the position of the folding and unfolding wing in the folded state through a pin piece. The energy storage spring is installed on the axial linear movable moving module, and in the folding and unfolding wing folding state, the energy storage spring is extruded by the connecting rod sliding block and applies forward elastic force to the connecting rod sliding block. According to the design of the hidden folding and unfolding wing mechanism of the underwater glider, the air-drop process is simplified, maneuverability and stability are improved, and meanwhile good hydrodynamic performance and attractive appearance are kept.

The utility model discloses a high-pressure water jet cleaning spray head with high efficiency, which comprises a spray head seat and a plurality of nozzles, the spray head seat is provided with a water injection cavity, a plurality of annularly distributed first side cavities and a plurality of annularly distributed second side cavities, and the first side cavities and the second side cavities are sequentially arranged along the axis direction of the water injection cavity and are crosswise distributed; the first side cavity and the second side cavity are also communicated with the water injection cavity and have different inclination angles relative to the water injection cavity; the nozzles are connected to the first side cavities or the second side cavities in a one-to-one correspondence mode and used for spraying water flow towards the same side. The nozzle can reduce the atomization effect, increase the impact force and impact area of water jet, and improve the cleaning efficiency.

The present invention discloses a hydraulic model and design method of a pump-jet propulsor with a movable flexible guide vane, which relates to the technical field of underwater vehicle propulsors, including flexible guide vanes, rotors, stators, stator hubs and rotating shafts; the stator hub is a hollow structure, a support bearing is arranged in the stator hub, and the support bearing is used to support and position the rotating shaft; a stator and a flexible guide vane are arranged on the outer wall of the stator hub; a rotor is arranged on the rotating shaft, and the rotor is arranged between the stator and the flexible guide vane; the stator, the rotor and the flexible guide vane are all arranged in a conduit, wherein the stator is fixedly connected to the conduit; the conduit is a conical structure, the flexible guide vane is arranged at the large end position of the conical structure, and the stator is arranged at the small end position of the conical structure. The present invention can better adapt to complex sea conditions such as non-uniform wake and oblique flow by adding flexible guide vanes, and improve its stability and hydrodynamic performance under complex sea conditions.