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 vertical pultrusion process of a multilayer fiber composite laminated section bar, which comprises the steps of: arranging longitudinal and circular fibers on a tubular core die to form a fiber bundle laminated fiber composite laminate and tracting to move; introducing one part of glue into the fiber composite laminate and injecting, injecting the other part of glue from the outer part of the fiber composite laminate to ensure that the glue dips the fiber composite laminate; and finally, heating for forming and cooling. A pultrusion device comprises a tracting machine used for tracting the fiber composite laminate and a heating forming die, wherein the heating forming die is provided with an internal and external injection device, a tubular core die is arranged on the internal and external injection device, an internal injection hole of the internal and external injection device is connected with one pipe mouth of the tubular core die, the other pipe mouth of the tubular core die and an external injection hole of the internal and external injection device are connected to an injection pump, at least one group of yarn distributors are sleeved on the tubular core die and comprise a longitudinal yarn coil and a circular yarn winder, and the longitudinal yarn coil is positioned in front of the circular yarn winder along the traction direction.

A structure having one or more micruchannels capable of forming air gaps between the inner surface of the microchannel and a fluid in the microchannel. As a result, the viscous resistance can be decreased by a factor of 5 or more. A microchannel according to this invention can have a textured inner surface which provides for air gap formation. The hydrophobicity of the microchannel can provide enhanced fluid transport by adjusting surface tension.

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.

New design of vessel with submersible hulls which can transport large cargos at high speed sailing above the waves and which is made up of two parallel submerged bodies (4), clearly cylindrical in cross-section or as hydrodynamic as possible, joined by hydrodynamic profiles (5).Four hydrodynamic legs (3) are located in the confluence between the cylinders (4) and the profiles (5) capable of supporting a platform or loading zone (2) which can move (up or down) on the legs (3) which have a system of vertical displacement so as to raise itself above the level of the waves.The parallel bodies of submerged displacement (4) joined to the hydro-dynamic profiles (5) can be completely covered with a textile of permeable sheets of porosity less than the size of a molecule of water and greater than that of a molecule of air and air can be pumped into the interior. The air molecules escape via the pores breaking the outer layer and separating the water molecules from the submerged area so as to reduce viscous friction to a significant degree.The lower works can be raised to the level of the sea to load and material in their interior or to enter shallow water ports.

A hermetic compressor includes a closed vessel for storing lubricating oil, an electric-driving element, and a compressing element driven by the electric-driving element. The compressing element includes a cylinder block forming a compression chamber, a piton that reciprocates inside the compression chamber, and an oiling device for supplying the lubricating oil to an outer circumference of the piston. A first oil groove is concavely formed on the outer circumference of the piston, and a second oil groove is concavely formed on a side opposite to the compression chamber relative to the first oil groove. The second oil groove has a spatial volume same or greater than that of the first oil groove. An expanded clearance portion is provided such that a clearance between the piston and the cylindrical hole portion broadens from a top dead point to a bottom dead point.

The invention provides a rotary compressor which comprises a shell and a compression pump body arranged in the shell, wherein the bottom of the shell is provided with an oil pool used for storing lubricating oil; the compression pump body is provided with a valve seat concave part used for installing an air outlet valve plate; the compression pump body is also provided with an oil return channel, and the lubricating oil accumulated in the valve seat concave part can flow back into the oil pool at the bottom of the shell through the oil return channel; the inner end of the oil return channel is communicated with the valve seat concave part; the outer end of the oil return channel extends to the outer edge of the compression pump body. According to the rotary compressor, the lubricating oil accumulated in the valve seat concave part can flow back into the oil pool at the bottom of the shell of the rotary compressor through the oil return channel, so that the effects of reducing the viscous resistance of the air outlet valve plate and reducing the oil yield of the compressor can be achieved, and the performance of the rotary compressor can be improved.

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.

A rolling bearing includes an inner ring; an outer ring coaxially disposed around an outer peripheral surface of the inner ring with an annular space between the inner ring and the outer ring; a plurality of rolling elements rollably disposed in the annular space; a cage that retains the rolling elements; and a bubble generating mechanism that generates bubbles in liquid lubricant during bearing rotation, wherein the liquid lubricant flows through the annular space.

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 invention provides a metal air cushion ship, including ship hull, wherein, the said ship hull forms from tow or more separate balance air cabins, and the bottoms of each air cabin is opening. The invention is provided with advantages of save, stabilization, small ship resistance, simple construction, low naval construction cost compared with nowadays technology, it can be xtensive use in miscellaneous ship.

The invention discloses a device for reducing frictional resistance and a method for reducing viscous frictional resistance of fluid by means of the device. The device comprises rolling bodies and a rolling skin, and the rolling bodies are inlaid into the surface of the rolling skin. The method comprises the step that the surface of a moving object is covered with the rolling skin which is provided with the rolling bodies in an inlaid mode on the relative movement interface of the moving object and the fluid. Compared with the prior art, the device and the method have the advantages that the relative movement surface of the moving object and the fluid is covered with a layer of the rolling skin, relative movement of the fluid drives balls or rollers on the surface of the skin to rotate, therefore, the relative movement speed between the fluid and the object surface is decreased, and the viscous resistance of the fluid is decreased. The method is suitable for the surfaces of objects onwhich the fluid and a solid relatively move, such as the surfaces of all objects moving in the fluid or the inner surfaces of pipelines in which the fluid moves and has the wide application prospect in the fields of high-speed transportation and transportation.

The invention relates to a preparation method for a microfluidic array controller, and belongs to the technical field of microfluidic control. The preparation method solves the problem that large-scale microfluidic array control is not easy to realize in the prior art. The preparation method comprises the following steps that microfluidic control units are prepared, wherein each microfluidic control unit comprises a microfluidic channel device, a thin-film transistor device and a capacitor; a power supply 1 and a power supply 2 are selected according to the preset requirement; and M*N microfluidic control units are arranged into a M*N array and are connected in a line connection mode. According to the preparation method, the prepared M*N array only needs M+N+2 leads, and the microfluidic control voltage only needs to be about 20 V. The preparation method for the microfluidic array controller has the advantages that the large-scale microfluidic arrays control can be realized, the large-scale microfluidic array control difficulty can be greatly lowered, the number of the leads can be decreased, and a novel technological approach is provided for the practicability of a microfluidic control chip.

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.

The invention discloses a full-gas-to-electric-energy driven metal air cushion jet recovery ship structure and a power generation device and belongs to the field of ship structures. The device comprises an airflow collecting umbrella; a driving shaft is installed in the airflow collecting umbrella; an impeller is installed on the driving shaft; the driving shaft is in power connection with the input end of a power generator and the output end of a motor; a velometer is installed on the power generator; the power generator is electrically connected with a storage battery; the motor is electrically connected with the storage battery; the velometer, the generator and the motor are all connected to a control module. Airflow is collected through the airflow collecting umbrella and gathered to push the impeller to rotate; the driving shaft drives the generator to generate power, the generator supplies power for the ship and charges the storage battery; when an airflow driving force is insufficient and the generator cannot reach a rated rotating speed, the storage battery supplies power to the motor; the motor returns power to assist in driving the driving shaft to rotate, so that the rotating speed of the generator is reinforced, and therefore, it is guaranteed that the generator can output stable voltage uninterruptedly for a long time, and energy conservation and environmental protection are facilitated.

The invention discloses a magnetorheological fluid brake, and relates to the technical field of magnetorheological fluid brakes. A braking function is realized by retractable brake blades disposed between a left brake disc and a right brake disc, during braking, after the brake blades extend out from brake blade temporary storage slots, the gap between the left brake disc and the right brake discis small, and a magnetic field generated by an electromagnetic coil quickly realizes the braking function. The left brake disc and the right brake disc and a left end cover and a right end cover are provided with large gaps, the viscous resistance in the zero field is small, the heat productivity of the magnetorheological fluid brake during the running of a vehicle is low, the energy loss is reduced, and the braking stability of the magnetorheological fluid brake is further effectively ensured; separating from a hydraulic system, the instantaneous attraction of an electromagnet and the restoring force of a tension spring are counted on to regulate the pop-up and contraction of the brake blades, the decoupling of the magnetorheological fluid brake and a brake pedal is realized, and the realization of brake-by-wire on a new energy vehicle is facilitated.