6results about How to "Improve hydrodynamic performance" patented technology

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 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 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.