109results about "Liquid organic insulators" patented technology

The application discloses a manufacturing method of an involute transformer core, which comprises the following steps: S1, cutting a stainless steel silicon steel sheet to obtain a silicon steel sheet blank; S2, using a rolling tool to manufacture the silicon steel sheet blank into an involute silicon steel sheet; S3, stacking a plurality of the involute silicon steel sheets on the periphery of a base cylinder, and tightly holding the involute silicon steel sheets and the base cylinder by using a plurality of stainless steel hoops to form a holding piece, and annealing the holding piece as a whole; S4, bundling; S5, preheating the bundled piece; S6, immersing the preheated bundled piece into insulating paint; S7, solidifying the bundled piece; S8, surface treatment; and S9, gluing, coating epoxy glue on the outer surface of the component which has been surface treated in the step S8, and firmly bonding the component with an epoxy cylinder. The manufacturing method of the involute transformer core provided by the application has single specification of the involute silicon steel sheet, avoids a plurality of specifications of the width of the radial silicon steel sheet, is convenient to manage, and reduces storage devices.

The invention relates to the use of a heat-transfer fluid based on an aliphatic monoester in the manufacturing of semiconductor components.

The invention relates to the use of a heat transfer fluid based on aliphatic monoesters in the manufacture of semiconductor components.

An apparatus for heat transfer includes a device and a mechanism for transferring heat to or from the device. The mechanism includes a working fluid that includes a fluorinated aromatic compound having structural formula (I): where Q is a carbon atom or a nitrogen atom; G is an oxygen atom or a sulfur atom; each R1 is, independently, a fluoroalkenyl group having 2 to 11 carbon atoms and optionally comprises one or more catenated heteroatoms; each R2 is, independently, (i) a hydrogen atom or a fluorine atom; or (ii) a fluoroalkyl group or a fluoroalkenyl group having 1 to 9 carbon atoms and optionally comprises one or more catenated heteroatoms; each R3 is, independently, a hydrogen atom or a fluorine atom; x is 1-3; a is 1-2; y is 1-5; when Q is a carbon atom, z=6-y-a; and when Q is a nitrogen atom, z=5-y-a.

The present invention relates to a specific combination of esters, a composition comprising it, and its uses as a lubricant and / or liquid dielectric coolant.

The invention discloses binary hydrocarbon insulating liquid, a preparation method and application of the binary hydrocarbon insulating liquid in an oil-immersed transformer, and belongs to the technical field of liquid insulating dielectrics. The binary hydrocarbon insulating liquid is composed of the following components in percentage by volume: 10-30% of short-chain low-branched alkane; the balance is long-chain multi-branched alkane, and the total percentage is 100%; in the short-chain low-branched alkane, the number of carbon atoms of a first main chain is 15-20, the number of first branched chains is 1-2, the first branched chains are methyl and / or ethyl, and the first branched chains are distributed at the end part of the first main chain; in the long-chain multi-branched alkane, the number of carbon atoms of a second main chain is 21-28, the number of second branched chains is 2-6, and the second branched chains are methyl and / or ethyl. The binary hydrocarbon insulating liquid provided by the invention has excellent lightning impulse insulating performance.

The present invention relates to the use of a heat transfer composition comprising at least one refrigerant selected from the group consisting of halogenated hydrocarbons, perhalogenated hydrocarbons, fluorinated ketones, fluorinated ethers, and combinations thereof, and at least one dielectric fluid, said heat transfer composition having a volume resistivity greater than or equal to 10 6 Ω.cm at 25°C, for cooling devices, such as batteries of electric or hybrid vehicles.

To provide a composition for forming a low dielectric resin which exhibits high heat resistance after curing and a low dielectric constant and a low dielectric loss tangent in a high frequency region, and a composition for forming a low dielectric resin which can be adjusted in a varnish form by absence of a solvent or use of a small amount of an organic solvent, and to provide a composition for forming a low dielectric resin which exhibits high transparency or high heat dissipation property in addition to the above characteristics.MEANS: A compound (1) having a cis-1,4-cyclohexylene structure, and a composition containing at least one selected from its polymer maintain flowability in a temperature range around normal temperatures, can be adjusted in a varnish form by absence of a solvent or use of a small amount of an organic solvent, can be molded in a solution process, exhibit high heat resistance after curing and a low dielectric constant and a low dielectric loss tangent in a high frequency region, and can achieve a curable resin composition exhibiting high thermal conductivity.SELECTED DRAWING: None

The present invention relates to lubricant composition comprising:a corrosion inhibitor comprising A1 and A2:A1: 0.3-3 wt. % of one or more octadecylamine N—C10-20 alkanoyl sarcosinates,A2: 1-5 wt. % of one or more substances selected from lanolin magnesium soap, lanolin calcium soap, lanolin barium soap, lanolin lithium soap, barium petroleum sulfonate and sodium petroleum sulfonate,0.2-2 wt. % of one or more surfactants selected from Span-80, AEO-9 and TX-4;10-40 wt. % of a lubricant base,0.2-2 wt. % of fullerene C60,50-80 wt. % of a solvent selected from D80, D100 and D110, andoptionally, a propellant gas;all wt. % percentages are based on the total weight of the lubricant composition.

The invention relates to the use of a heat-transfer fluid based on an aliphatic diester in the manufacturing of semiconductor components.

There is provided a copolymer containing tetrafluoroethylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of perfluoro(propyl vinyl ether) unit of 5.5 to 6.5% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 36.1 to 49.9 g / 10 min, and the number of functional groups of 50 or less per 106 main-chain carbon atoms.

There is provided a coated electric wire comprising a core wire and a coating layer installed on a periphery of the core wire, wherein the coating layer comprises a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit, and a fluoro(alkyl vinyl ether) unit, the fluorine-containing copolymer has a content of hexafluoropropylene unit of 9.5 to 10.5% by mass with respect to the whole of the monomer units, the fluorine-containing copolymer has a content of the fluoro(alkyl vinyl ether) unit of 0 to 0.3% by mass with respect to the whole of the monomer units, and the fluorine-containing copolymer has a melt flow rate at 372°C of 5.6 to 8.9 g / 10 min.

There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 9.4 to 10.1% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 0.8 to 1.7% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 4.5 to 8.5 g / 10 min, and a total number of a carbonyl group-containing terminal group, -CF=CF2 and -CH2OH per 106 main-chain carbon atoms of 90 or less.

The invention relates to the use of a heat transfer fluid based on aliphatic diesters in the manufacture of semiconductor components.

The invention relates to the technical field of transformer insulating oil, and discloses an adsorption decolorization process of natural ester insulating oil. According to the adsorption decolorization process, activated carbon, calcium oxide and water are firstly adopted to prepare a calcium-based alkaline adsorbent, and then the calcium-based alkaline adsorbent is mixed with natural ester insulating oil for adsorption decolorization; and filtering the natural ester insulating oil after adsorption and decoloration to obtain the base oil after adsorption and decoloration. According to the method, the calcium-based alkaline adsorbent with activated carbon and calcium oxide as components is used for adsorbing and decolorizing the natural ester insulating oil, so that common pigments in the vegetable oil can be preliminarily removed, and impurities, trace metals and some odor substances in the vegetable oil can be removed. According to the adsorption decolorization process, the acid value and the dielectric loss factor in the vegetable oil can be reduced, so that the natural ester insulating oil reaches a relatively excellent level, and subsequent refining procedures and operations are reduced.

This application provides a power module, an inverter, and a vehicle. The power module includes a chip, a heat conducting layer, and a heat dissipation assembly. A thermal conductivity coefficient of the heat conducting layer is greater than or equal to 200 W / mK. The heat dissipation assembly includes a heat dissipation housing. The heat dissipation housing encloses accommodation space, and the chip and the heat conducting layer are disposed in the accommodation space. At least a part of the heat dissipation housing is a hollow housing, and at least one side of the chip is in contact with the hollow housing through the heat conducting layer. The hollow housing is filled with a cooling medium for cooling the heat conducting layer, and the cooling medium is an insulated fluid medium. According to the power module in this application, insulation and sealing of the chip is implemented through the heat dissipation housing and the cooling medium having an insulation property, and a ceramic layer does not need to be disposed as an insulation layer additionally, so that thermal resistance of the power module can be significantly reduced, and heat dissipation performance and reliability of the power module can be improved.

The present invention relates to a specific combination of esters, a composition comprising it, and its uses as a lubricant and / or liquid dielectric coolant.

Nanoparticle compositions with enhancing dispersibility and long-term stability that can increase thermal conductivity of a dielectric fluid and improving insulation material lifetime, methods of manufacturing the nanoparticle compositions, and dielectric nanofluid compositions with the nanoparticles are provided herein. The nanoparticle compositions may include a metal oxide core and an organofunctional silane shell covering the TiO2 core, wherein the organofunctional silane shell is a structure represented by R1—Si(OR2)3.

The present invention provides a dielectric fluid comprising an oil of natural biological origin and one or more compounds selected from the group consisting of phosphite compounds. It has been found that the addition of one or more compounds selected from the group consisting of phosphite compounds to a dielectric fluid comprising an oil imparts a stabilizing effect that reduces, inhibits, or prevents the formation of gaseous inclusions in the dielectric fluid during normal use.

There is provided a method (200) and a system (100) for monitoring a leakage of an insulating fluid from a termination device (10) of a high voltage cable connection (14). The system (100) comprises a sensor for measuring a parameter of the termination device and a controller configured to perform the method, which comprises receiving (115; 202) at least one measurement of a parameter of the termination device (10) from a sensor (110); and determining (125; 204) a level (312) of the insulating fluid within the termination device (10) based on the at least one measurement.

Chlorinated fluoroaromatic compounds having structural formula (I): wherein G is an oxygen or sulfur atom; 1 are independently fluoroalkenyl groups having 2 to 10 carbon atoms and optionally containing one or more catenated heteroatoms; each R 2 are independently (i) a hydrogen atom or a fluorine atom, or (ii) a fluoroalkyl or fluoroalkenyl group having 1 to 9 carbon atoms and optionally containing one or more linearly linked heteroatoms; R 3 is a hydrogen atom or a fluorine atom; a is 1 to 3; x is 1 or 2; y is 1 to 4; and z=6-axy. TIFF2023508543000018.tif32115

The present invention relates to the technical field of conditioning agents used in particular to block water ingress or to locally retain certain active molecules, such as fertilizers, during their dissolution in the presence of water (irrigation, rain, etc.) and thus prevent their leaching into the soil or to dry sludge. The hydro-expandable liquid composition of the invention is in the form of a dispersion comprising at least 10% and up to 40% by weight of a superabsorbent polymer in powder form, in an inverse emulsion previously distilled from an anionic or nonionic, linear, branched, or cross-linked organic polymer.

The application discloses an electrical equipment insulating liquid and a preparation method thereof, and belongs to the technical field of insulating liquid preparation. The preparation method comprises the following steps: sequentially adding trimethylolpropane, octanoic acid, decanoic acid and oleic acid into a reaction container, then adding toluene sulfonic acid as a catalyst to perform esterification reaction, and obtaining a substrate after esterification reaction; removing unreacted substrates from the substrate after esterification reaction by using a vacuum distillation method to obtain a product after distillation; naturally cooling the product after distillation, first performing alkali refining treatment by using a sodium hydroxide solution, then washing by using ultrapure water to remove sodium salt in the alkali refining process, then performing adsorption by using an adsorbent to remove water and polar impurities, then vacuum drying, and finally performing filter membrane filtration to generate trimethylolpropane octanoic acid decanoic acid oleic acid triester insulating liquid. The application can overcome the problem of low ignition point of trimethylolpropane ester insulating liquid, has excellent electrical performance, and is suitable for electrical equipment such as transformers.

An electrotechnical fluid composition, comprising more than 90 wt-% paraffins in the C17-C18 range, based on the total weight of the composition, is described. The ratio of the amount of C18 i-paraffins to the amount of C18 n-paraffins is more than 40, based on the weight of the C18 i-paraffins and the weight of the C18 n-paraffins in the composition.

A power cable including: a conductor extending along a center axis; an insulation system including at least a first semiconducting layer provided around the conductor, and an insulation layer provided around the first semiconducting layer; wherein the insulation layer includes: a) 60 to 90 wt % polypropylene; b) 5 to 20 wt % styrene block copolymer; c) 1 to 6 wt % dielectric fluid; and d) 0 to 15 wt % polyethylene.

There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 10.3 to 11.6% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 1.4 to 2.6% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 24.1 to 39.9 g / 10 min, and a total number of a carbonyl group-containing terminal group, -CF=CF2 and -CH2OH per 106 main-chain carbon atoms of 120 or less.

Processes for processing bio-sourced oil to produce bio-sourced oil dielectric fluids can be carried out using an apparatus mounted on a mobile transport platform system having a total footprint of no more than about 30 m2. The processes use a described array of pumps, heaters, filters, a degasser and vacuum system, and an additive metering / mixing valve system to achieve production under low energy and pressure conditions.

There is provided a method (200) and a system (100) for monitoring a leakage of an insulating fluid from a termination device (10) of a high voltage cable connection (14). The system (100) comprises a sensor for measuring a parameter of the termination device and a controller configured to perform the method, which comprises receiving (115; 202) at least one measurement of a parameter of the termination device (10) from a sensor (110); and determining (125; 204) a level (312) of the insulating fluid within the termination device (10) based on the at least one measurement.