75results about How to "Reduce viscous resistance" patented technology

The invention relates to a strong gas-wetting nanosilicon dioxide water block removal agent, a preparation method thereof and a method for wetting transition of rock surface. The modified nanosilicon dioxide water block removal agent comprises the following raw materials: 0.1-0.5% of modified nanosilicon dioxide, 0.5-1% of an emulsifying agent OP-10, 0.5-1% of lauryl sodium sulfate, 25-50% of ethyl alcohol and the balance of water; the nanosilicon dioxide modified treating fluid is 0.05-0.3% of a non-ionic fluorocarbon surfactant water solution. The invention further provides a preparation method and application of the modified nanosilicon dioxide water block removal agent. The modified nanosilicon dioxide material has a super-hydrophobic and super-oleophobic property, can be used for changing the liquid-wetting property of the rock surface into strong gas-wetting property, so as to reduce the viscous resistance of fluid flowing on the rock surface, improve the flowing status of fluid in a porous medium, remove water blocking damage, is used for low-permeability oil and gas field exploitation and increasing of the oil and gas recovery ratio.

The invention relates to a water block removal agent and a preparation method thereof. The water block removal agent at least comprises the following components in percentages by mass: 0.1-0.5% of first modified nano silicon dioxide modified by a lipopeptid biological surfactant, 0.5-1.0% of second modified nano silicon dioxide modified by a fluorocarbon surfactant, 10-30% of ethylene glycol and the balance of water, wherein the first modified nano silicon dioxide, the second modified nano silicon dioxide, ethylene glycol and water are injected in proportion through injection equipment of the water block removal agent and the components are mixed in the injection equipment to form the water block removal agent. The water block removal agent provided by the invention has the advantages of being convenient to prepare, strong in surface activity, high-temperature-resistant, high-salt-resistant, strong in rock absorption, low in cost and the like.

The present invention discloses an underwater robot structure which can be recombined and flexibly matched with machine-mounted equipment. It is modularization structure, its external form is made into streamline form, the draught module is positioned in most front end of said streamline form, the propeller module is positioned in the tail end of said streamline form, between the draught module and propeller module an intermediate transition portion is set, the transition portion includes standard load bin and course regulation module, in which the standard load bin and course regulation module are modularized combination structure so as to form complete underwater robot.

Provided is a high-temperature-resistant low-loss compound insulation coaxial cable. The high-temperature-resistant low-loss compound insulation coaxial cable is characterized in that a solid or stranded inner metal conductor (1), a polytetrafluoroethylene micropore compound insulation layer (2), an outer conductor (3) and a sheath layer (4) are arranged from inside to outside in sequence, the solid or stranded inner metal conductor (1) longitudinally extends along the central axis of the cable, the outer conductor (3) is formed by knitting metal or is additionally provided with an inner shielding layer, the sheath layer (4) is made of FEP copolymer or low-smoke halogen-free flame retardant polyolefin, and the inner metal conductor (1) and the outer conductor (3) are separated by the polytetrafluoroethylene micropore compound insulation layer (2); the polytetrafluoroethylene micropore compound insulation layer (2) is made of modified polytetrafluoroethylene organic-inorganic nanocomposites filled with nano polyhedral oligomeric silsesquioxanes (POSS). According to the coaxial cable, the dielectric constant of the insulation layer of the cable is reduced. A traditional solid polytetrafluoroethylene insulation dielectric constant is reduced to 1.2-1.6 from 2.1 and is reduced by about 24 percent to 43 percent, and the signal attenuation of cable high-frequency communication is reduced.

The invention provides a graphite base and MOCVD equipment, and belongs to the technical field of semiconductors. The graphite base is of a disc-shaped structure, the first circular end face of the graphite base comprises a plurality of epitaxial wafer containing grooves and a plurality of cambered surface grooves, the epitaxial wafer containing grooves are arranged in a multi-layer circular ringmode in the radial direction of the first circular end face, and the circle center of the circular ring coincides with the circle center of the first circular end face. The cambered surface grooves are uniformly formed in the first circular end surface among the plurality of epitaxial wafer containing grooves at intervals, and the inner surfaces of the cambered surface grooves are spherical crown-shaped. The first circular end face of the graphite base comprises the plurality of epitaxial wafer containing grooves and the plurality of cambered surface grooves, and the cambered surface grooves are uniformly formed in the first circular end face between the epitaxial wafer containing grooves at intervals, so that the uniformity of the epitaxial layer at the edge position of the graphite baseis improved, and the consistency of epitaxial wafers is improved.

An ironless AC linear motor for generating a thrust such that a carrier can move relative to a stator along a movement axis, includes parallel rows of permanent magnets arranged along the movement axis with a given magnet pitch to form a magnetic gap, a row of ironless coils having through holes and a manifold connected to the cooling tubes for distributing the coolant having a length equal to the magnet pitch in the direction of the movement axis.

The invention discloses a method for carrying out dynamic sealing between kinematic pairs in a reversing valve of a hydraulic piston pump and the reversing valve, which is subjected to sealing by adopting the method, of the hydraulic piston pump. The method and the reversing valve of the hydraulic piston pump have the technical characteristics that all movable fitting pieces of the reversing valve of the hydraulic piston pump are subjected to sealing by adopting Glyd rings or Step-seal-combined sealing members. The method and the reversing valve of the hydraulic piston pump have the advantages that the problem of dynamic sealing of the hydraulic piston pump when water is used as a power medium is solved, and power media used by the hydraulic piston pump can be diversified; the operation of the reversing valve can be stable, and the dynamic sealing effect is more reliable; the advantages of the hydraulic piston pump are fully played, so that the hydraulic piston pump can be more widely applied to oilfields and replace a walking-beam oil pumping machine; and the service lives of the sealing members of the reversing valve can be greatly prolonged.

The invention relates to a magnetic control type full-angle-feeding three-product heavy medium cyclone, belonging to the technical field of coal separation equipment. The heavy medium cyclone comprises a cyclone cylinder and a magnetic control device, wherein the magnetic control device is arranged on the cyclone cylinder and is used for changing weight medium distribution of to-be-separated materials in the cyclone cylinder by virtue of magnetic force traction; the magnetic control device comprises an internal magnetic system and an external magnetic system which are respectively arranged on the inner side and outer side of the cyclone cylinder, and the internal magnetic system and the external magnetic system are respectively electrified to control the magnetic force. The heavy medium cyclone has the beneficial effects that after materials are fed into the cyclone cylinder, traction forces are generated to heavy mediums by virtue of the magnetic forces of the internal and external magnetic systems of the magnetic control device, so that the distribution of the heavy mediums is regulated, the materials are effectively dispersed, and elimination of blockage is facilitated; the stability of suspension liquid is controlled, and the separation time is regulated and controlled; the distribution of separation layers of the heavy mediums is changed, the loss of clean coal is reduced, the yield of the clean coal is improved, a coarse size phenomenon is reduced, and the quality of the clean coal is improved; by arranging a flow guide device, the materials and the medium suspension liquid can be fed in batch along a 360-degree annular direction, so as to realize batch washing selection.

The invention provides a method for preparing a bipolar plate, which comprises the following steps of: dissolving binder into organic solvent, adding carbon black serving as additive, ultrasonically dispersing the mixture in an ultrasonic machine, adding required graphite conductive filler and water into the mixture, and then ultrasonically dispersing the mixture in the ultrasonic machine, stirring the mixture at the same time, and drying the mixture, wherein the ultrasonic frequency is between 20 and 80kHz; and crushing the mixture, and obtaining the bipolar plate by a molding-curing process. The method improves wetting property between inorganic conductive objects and organic polymer, and can also use a coupling agent. The method makes all the materials uniformly mixed and improves conductivity of the bipolar plate prepared by the method by near 70 percent.

The invention discloses a processing method of an amorphous alloy member, and belongs to the technical field of amorphous alloy processing. The processing method comprises the following steps that theglass-transition temperature and the crystallization initial temperature of amorphous alloy under continuous heating conditions are measured; the crystallization starting time of the amorphous alloyunder the isothermal condition is measured; and the amorphous alloy is subjected to friction heat generation processing - rapid cooling, and amorphous alloy products are obtained. According to the processing method of the amorphous alloy member, the characteristic that the viscous resistance of the amorphous alloy is reduced in an overcooling liquid phase region is utilized to process the amorphous alloy, the problems that the amorphous alloy is difficult to machine at room temperature, long in processing period, high in cost and the like are solved, and feasibility is provided for the processing and application of the amorphous alloy.

The invention provides a tunnel side wall drainage net which is composed of a plurality of arc-liked vertical pipe pieces, a plurality of arc-like horizontal pipe pieces, a plurality of four-way connectors and a plurality of drainage tubes, wherein the plurality of arc-like vertical pipe pieces are covered with water hole belts, and the plurality of arc-like horizontal pipe pieces are covered with water hole strips. The four-way connectors are formed by vertical connecting pipes and horizontal connecting pipes. The vertical pipe pieces are connected with the vertical connecting pipes of the four-way connectors, and the horizontal pipe pieces are connected with the horizontal connecting pieces. A grid structure is formed by combining and splicing of the plurality of vertical pipe pieces, the plurality of horizontal pipe pieces and the four-way connectors. The vertical pipe piece at the lowest end of the grid structure is connected with the drainage tubes, wherein two ends of the drainage tubes are not sealed. The tunnel side wall drainage net has the advantages that seepage deposited on a side wall is avoided due to an open type grid, and underground construction operating safety is improved. An included angle formed by the horizontal pipe pieces and the side wall can be adjusted, symmetrical water flow can be fast guided, and over large point location seepage pressure of the side wall can be prevented. The drainage tubes are clear in guiding, dewatering is thorough, shock strength is high, fluid viscous resistance is low, the assembly is simple, and use is convenient.

The invention relates to a high-speed air cushion ship, belonging to the ship technique, wherein said invention comprises a ship hull and mechanical pushing screw mounted at the stern of ship hull; the bottom of hull is flat while the middle part is the main air chamber whose bottom is open; two sides of main air chamber are mounted with stabilize air chambers whose bottoms are open; the hull has air boost device whose high-pressure outlet is through to the main air chamber and the stabilize air chamber; the bottom of ship that at the back of main air chamber is mounted with several diversion grooves concave upwards. The invention has low sailing resistant, simple structure and the application in common or military transportation.

The invention provides a high-viscosity glue solution jet-dispensing quality improving method comprising the steps of cleaning a nozzle cavity of a valve seat and the inner wall of a valve body; plating a copper-containing microlayer on the inner wall of each of the nozzle cavity and the valve body; electrochemically plating the copper-containing microlayer to obtain a copper sulfide nanolayer; and carrying out ultra-thinning treatment on the copper sulfide nanolayer to improve the structural characteristic of the copper sulfide nanolayer. When a high-viscosity glue solution moves relative to the wall of a cavity body, a driving force in the flowing direction of the high-viscosity glue solution and a viscous resistance for resisting to the flow of the high-viscosity glue solution can be generated. Due to the adoption of the copper sulfide nanolayer, the wettability of each of the high-viscosity glue solution and the wall of the cavity body is changed, the contact area of the high-viscosity glue solution and the wall of the cavity body is reduced, and a driving resultant force in the flowing direction is increased under the condition that the driving force is unchanged, so that the directions of acting forces acting on the high-viscosity glue solution more consistently point to a jet orifice, and the high-viscosity glue solution is more easily jet in a high-speed and stable state. The invention also provides a dispensing device capable of realizing the same technical effect.

The invention provides a micro stirrer driven by a multi-core fiber, comprising a pyramidal multi-core fiber made of a section of multi-core fibers via fused biconical taper and small particles made from composite materials, wherein the small particles are located at the pyramidal end of the pyramidal multi-core fiber; the non-pyramidal end of the pyramidal multi-core fiber is connected with a light source; a plurality of fiber core emergent lights of the pyramidal multi-core fiber simultaneously act on the small particles in a vertical suspension liquid; the upper body of each small particle is a sphere and a rotating shaft which are made from materials with lower density; and the bottom of the each small particle is of a windmill-shaped structure with a plurality of wings made from materials with higher density. The micro stirrer provided by the invention has the characteristics of small volume, light weight, simple structure, low price, easiness in operation, high mixing efficiency, benefit of the reduction of reagents, and the like and can be widely applied to the fields of biology and chemistry.

The present disclosure relates generally to the field of facilitating a laminar flow and sound mitigation between a wetted hull of a vessel and surrounding fluid. More specifically, the present disclosure includes methods, systems, and apparatuses to facilitate providing and sustaining a laminar flow of a fluid across a vessel. A system for sustaining laminar flow of a fluid across a vessel comprising a main control unit. The main control unit comprises one or more air compressor units configured to generate air. An integrated longitudinal air distribution assembly is secured to a wetted hull of the vessel. The distribution assembly comprises a series of air dispersal modules configured to distribute the generated air across the wetted hull of the vessel to create at least one air layer between the wetted hull of the vessel and the fluid to sustain the laminar flow of the fluid across the vessel.

The present invention relates to a refinery excess sludge dewatering method and a refinery excess sludge dewatering apparatus, and provides a refinery excess sludge dewatering method, which comprisesthat (A) refinery excess sludge is subjected to swirling flow rotation dewatering; (B) the dried sludge is subjected to gas flow acceleration sorting; (C) the sludge granules having high water contentand sorted in the step (B) return, and are subjected to mixed granulation with wet sludge, and the obtained mixture enters the next swirling flow rotation dewatering process; (D) the sorted sludge with low water content is subjected to swirling flow rotation re-dewatering and granule capture; and (E) swirling flow gas-liquid separation is performed to remove the oil phase and the water droplets carried in the gas obtained in the step (D) to obtain purified gas for recycling. The invention further provides a refinery excess sludge dewatering apparatus.