Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

305results about How to "Good controllability" patented technology

Closed cooling system of gas cooled polysilicon ingot furnace

The invention relates to the manufacture technical field of polysilicon ingot furnaces, and aims to provide a closed cooling system of a gas cooled polysilicon ingot furnace. The system comprises a heat exchange platform positioned on a supporting column and used for placing a crucible, wherein a cooling gas channel is arranged in the heat exchange platform; a gas inlet and a gas outlet at two ends of the cooling gas channel are respectively connected with a cooling gas inlet pipeline and a cooling gas outlet pipeline; and the heat exchange platform, the cooling gas inlet pipeline, the cooling gas outlet pipeline, a cooling gas power pump group and a cooler form a closed circulation loop of the cooling gas. Compared with the cooling method of radiation cooling and water cooling, the system related by the invention has strong gas cooling control capacity and high industrial controllability; the gas is fed into the heat exchange platform evenly, so that the whole temperature of the heatexchange platform is even, which is in favor of even nucleation of a silicon melt at the bottom of the crucible; and the reducing speed of the temperature at the bottom of the crucible can be precisely controlled during the crystal growth.
Owner:ZHEJIANG JINGSHENG MECHANICAL & ELECTRICAL +1

Damping-adjustable magneto-rheological lag damper

The invention relates to a damping-adjustable magneto-rheological lag damper. The damping-adjustable magneto-rheological lag damper comprises a cylinder barrel, a piston rod, a piston component and a damping adjusting mechanism. Stub shafts are integrally produced at the outer edge of the left end of the cylinder barrel symmetrically and radially, and an end cover is mounted at the right end of the cylinder barrel hermetically and coaxially. The piston rod is penetratingly mounted in the cylinder barrel coaxially, and two ends of the piston rod are positioned outside the cylinder barrel. The piston component is mounted at the position, on the inner left side of the cylinder barrel, of the piston rod coaxially. The damping adjusting mechanism is slidably mounted at the position, corresponding to the piston component and positioned on the inner right side of the cylinder barrel, of the piston rod coaxially and rotates around an axial center by a certain angle prior to being fittingly mounted together with the piston component, and the left end, positioned outside the cylinder barrel, of the piston rod is in coaxial threaded connection with a rod-end joint bearing. The damping-adjustable magneto-rheological lag damper has the advantages of simple structure, low energy consumption, small size, rapidity in response, continuous forward and reverse adjustability in damping force within a wide range, good temperature stability, easiness in combination with a computer to achieve intelligent control and the like, thereby being quite promising in application prospect.
Owner:CIVIL AVIATION UNIV OF CHINA

One-stage method for preparing metal matrix light-weighted composite material

InactiveCN104588617AWell-proportioned holesGood controllabilityMetal matrix compositeEnergy absorption
The invention relates to a one-stage method for preparing a metal matrix light-weighted composite material. The invention uses the method of pressure maintaining percolation and vacuum suction casting to make molten metal immerse into the gaps among hollow spheres by penetrating through a porous ceramic plate or a graphite plate under the function of negative pressure, after the molten metal is cooled down after totally infiltration, and finally, the molten metal is demoulded and taken out, then a foamed metal matrix composite material including closed bubbles can be obtained. The hollow spheres are mixed hollow spheres of two or more than two kinds of Al2O3 hollow spheres, SiC hollow spheres, C hollow spheres or glazed hollow beads of different or same sizes. The porosity of the metal matrix composite material prepared by the method of the invention can reach more than 60% and the density can be obviously reduced, besides, the compression strength can be improved by 20-50% compared with the similar product, so that the high-strength and light-weighted matrix light-weighted composite material with various functions like damp shock absorption, sound insulation and noise reduction, energy absorption can be obtained. According to the one-stage method for preparing the metal matrix light-weighted composite material disclosed by the invention, the process is simple, the procedure is less and the applicable range to the varieties and sizes of the hollow sphere particles is wide, and nearly no selection to the matrix metal, the foam metal products of different densities can be prepared.
Owner:TONGJI UNIV

Cast-in-situ invert filter type pervious ecological concrete and method for constructing slope protection thereof

InactiveCN101486555AGood damping performanceReduce margin heightPorosityRevetment
The invention discloses cast-in-situ reversed filtering type non-watertight eco-concrete and a construction method for a revetment thereof. The eco-concrete is the composition of grain aggregates and a cement hydrate; the grain aggregates comprise coarse aggregates and thin aggregates, which account for 70 to 85 percent of the total weight of the composition; the cement hydrate is the mixture of Portland cement, water and additive; the doping amount of the cement and the water accounts for 14.5 to 29.5 percent of the total weight of the composition; the additive comprises calcium salt, silicon powder, functional inorganic salt as well as lignosulphonate question mark hydroxycarboxylic acid; and the doping amount of the additive accounts for 0.1 to 0.5 percent of the total weight of the composition. The eco-concrete of the invention can realize cast-in-situ construct, and has higher anti-pressing intensity; moreover, the poriness size and the aperture distribution range can be designed and the controllability is good; the cast-in-situ reversed filtering type non-watertight eco-concrete applied to the fields of revetment protecting and controlling can improve the anti-pressing intensity, the permeable performance and the reversed filtering performance of the concrete revetment and simultaneously has the function of greening vegetation.
Owner:JCK +1

Biomedical polysaccharide hemostatic and healing sponge and preparation method thereof

The invention discloses biomedical polysaccharide hemostatic and healing sponge and a preparation method thereof, and belongs to the technical field of medical materials. The preparation method comprises the following steps: firstly, dissolving a polysaccharide material carboxymethyl cellulose, hyaluronic acid or a mixture thereof into an alkaline solution, stirring sufficiently, and swelling into colloid; secondly, adding a crosslinking agent into the colloid, stirring sufficiently, incubating into uniform gel, and dialyzing and purifying the obtained gel; thirdly, adding glycerin into the purified product, stirring at a high speed for bubbling, and pouring into a lyophilizing disk; and finally, performing freeze drying at a low temperature to obtain dehydrated sponge. The hemostatic and healing sponge prepared with the method is good in flexibility, do not drop crumbs, is strong in liquid absorption, can provide a wet environment to a wound, is non-stick to the wound, is good in biocompatibility, is qualified in heavy metal detection and endotoxin detection, is non-cytotoxic in a bio-safety test, is free of intradermal irritation and sensitization response, and has the functions of stopping bleeding rapidly, absorbing exudate and promoting wound healing.
Owner:JIANGSU CHANGJIYONG BIOTECH CO LTD

Method for preparing quaternary ammonium salt chitosan and polyvinyl alcohol antibacterial filter composite material

The invention discloses a method for preparing a quaternary ammonium salt chitosan and polyvinyl alcohol antibacterial filter composite material. The method is characterized by comprising the following steps: mixing and stirring chitosan powder, acetic acid and deionized water to form a chitosan acetic acid solution; adding isopropyl alcohol, stirring and standing; heating a container through a water bath, and dropwise adding a certain amount of 2,3-epoxypropyltrimethylammonium chloride at set intervals to react; at the end of the reaction, adding absolute ethanol to the container, precipitating, performing suction filtration, and then soaking with acetone, washing, performing suction filtration, and drying to obtain modified quaternary ammonium salt chitosan; preparing a spinning solutionfrom the modified quaternary ammonium salt chitosan, and adding the spinning solution into a polyvinyl alcohol spinning solution to be mixed and stirred to obtain a mixed spinning solution, and obtaining the composite material by an electro-spinning method. The method disclosed by the invention satisfies the development requirements that the material is light and thin, and has good filterabilityand excellent antibacterial performance and the like in practical application, and can be used for preparing biomedical antibacterial protective materials such as biofiltration membranes, protective masks, wound dressings and the like.
Owner:DONGHUA UNIV

Multi-field supportable virtual machine dispatching device and multi-field supportable virtual machine dispatching method

The invention discloses a multi-field supportable virtual machine dispatching device and a multi-field supportable virtual machine dispatching method. The multi-field supportable virtual machine dispatching device comprises a virtual machine cluster information central access module, a virtual machine dispatching module and a virtual machine dispatching information central output module, wherein the virtual machine cluster information central access module is used for receiving input cluster information, the virtual machine dispatching module is used for analyzing cluster information and generating dispatching policy required by fields, and the virtual machine dispatching information central output module is used for centrally outputting policy information. The virtual machine cluster information central access module receives processing requests of a virtualization cluster system and preprocesses the same into a uniform input information format. The virtual dispatching module classifies states of the virtualization cluster system according to input information, generates corresponding dispatching policy for processing the requests according to classifications and outputs dispatching commands through the information central output module. Dispatching virtualization clusters under multiple fields can be realized well, and the purpose of dispatching under different fields is achieved. By modular design, uniform interfaces are used among modules, transparency in design of dispatching algorithm is improved, and application range is wide.
Owner:ZHEJIANG UNIV

Compounding method for nanometer ultrathin boron carbon nitrogen sheet

The invention discloses a compounding method for a nanometer ultrathin boron carbon nitrogen sheet and belongs to the technical field of material preparation. The method comprises the following steps: mixing diboron trioxide, melamine, glucose and the mixed salt of NaCl and KCL, then grinding, and performing heat treatment on the acquired powder under the atmosphere of ammonia gas, thereby acquiring the nanometer ultrathin boron carbon nitrogen sheet. According to the invention, the low-cost mixed salt and the boron carbon nitrogen precursor have a heating reaction under the atmosphere of ammonia gas, and the fused mixed salt is utilized as a template of the boron carbon nitrogen sheet, is evaporated at high temperature and is peeled, so that the nanometer ultrathin boron carbon nitrogen sheet characterized by having a graphite like phase crystal structure, the thickness of an atom-level ultrathin sheet, a huge size and a high specific area can be prepared. The compounding method disclosed by the invention is simple in operation; complex and expensive instruments and equipment are not required; the adopted raw materials are low in cost and are easily acquired; the environmental pollution is little; the method is suitable for large-scale production; and the compounding method has significance in boosting the application of the nanometer ultrathin boron carbon nitrogen sheet in the fields of photoelectric materials, organic catalysis, hydrogen storage carriers, detection analysis, and the like.
Owner:FUZHOU UNIV

Preparation method of methyl phenyl vinyl silicone resin

The invention discloses a preparation method of methyl phenyl vinyl silicone resin. The preparation method comprises the following steps: firstly mixing and agitating organic solvent, deionized water and strong acid, then dropwise adding a mixture for hydrolysis reaction, and increasing temperature and reflowing to obtain mixed solution, wherein the mixture consists of difunctional alkoxy silane, trifunctional alkoxy silane, monofunctional alkoxy silane and tetraethoxysilane; standing the mixed solution, cooling to room temperature, separating out an organic layer, washing the organic layer with deionized water till the organic layer becomes neutral, then adding an alkaline catalyst into the organic layer, increasing the temperature for azeotropic reflowing for a certain time to obtain azeotropic reflowing solution; cooling the azeotropic reflowing solution to 50 DEG C below, then adding solid acidic neutralizer, stirring for neutralizing, filtering, and conducting vacuum purification to obtain the methyl phenyl vinyl silicone resin. According to the preparation method, the process is easy to control, the labor intensity is low, the whole process has small toxicity, and the preparation method has the advantages that monomer sources are wide, cost is low, and the prepared methyl phenyl vinyl silicone resin has stable storage performance.
Owner:中山市卫宝婴儿用品有限公司

High-current full-wafer full-crimp flat-pack IGBT and manufacturing method thereof

The invention discloses a heavy-current whole-wafer total-pressure-contact flat-plate encapsulated IGBT (Insulated Gate Bipolar Transistor) and a manufacturing method thereof. The heavy-current whole-wafer total-pressure-contact flat-plate encapsulated IGBT comprises an IGBT whole wafer and a total-pressure-contact flat-plate encapsulation, the whole wafer comprises multiple independent IGBT device regions, each IGBT device region is composed of multiple IGBT units which are connected in parallel, collectors of all the IGBT device regions are connected in parallel to form a total collector, atransmitter is led from each IGBT device region independently, gate poles of all the IGBT device regions in a normal operating state are connected to a total gate pole arranged in the center of the wafer by using an interconnecting line, and the transmitter of each IGBT device region is connected with a metal electrode plate of a total transmitter in parallel by virtue of a metal gasket of the transmitter. According to the invention, a heavy-current IGBT whole wafer device is realized, the advantages of high working voltage, low switching power consumption and simple voltage control of the gate pole are maintained, current carrying capacity, heat-conducting property, heat shock resistance and long-term reliability of the device are improved, and the problem of property matching between IGBT units is solved.
Owner:HUNAN UNIV

Titanium alloy pipe inner wall magneto-rheological polishing method and device

The invention provides a titanium alloy pipe inner wall magneto-rheological polishing method and device. Magneto-rheological liquid is pumped into a polishing head inner cavity along the inner surfaceof a transmission rod under the effect of a creepage pump, and flows over through rectangular holes around the middle of a polishing head, the liquid flows to the polishing area from the left side and the right side, under the effect of a magnetic field, the apparent viscosity and the shear yield stress of the magneto-rheological liquid are rapidly increased, a Bingham medium with certain viscousplasticity is formed, along with relative motion of the polishing head and the pipe wall, the Bingham medium carries out shear removal on the pipe wall material, the magneto-rheological liquid obtained after polishing is collected through magneto-rheological liquid collecting mechanisms on the two sides of a pipe fitting, through filtering and stirring, the polishing process is continuously carried out, and circular utilization of the magneto-rheological liquid is achieved; in the magneto-rheological liquid circulation process, heat generated in the polishing area is brought away. The inner wall of the titanium alloy pipe can be automatically polished, the beneficial effects of being easy to control, good in polishing uniformity, high in work efficiency and the like are achieved, and themethod and device are particularly suitable for polishing treatment of the inner wall surface of the fine and long titanium alloy pipe.
Owner:NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products