44results about How to "Improve insulation stability" patented technology

The present invention may provide a motor including a shaft, a rotor coupled to the shaft, a stator disposed outside the rotor, and a bus bar disposed on the stator, wherein the bus bar includes a terminal connected to a coil of the stator, the terminal includes a first terminal and a second terminal which are separated from each other in a circuit manner, the first terminal includes a first neutral terminal and a plurality of first phase terminals, the second terminal includes a second neutral terminal and a plurality of second phase terminals, first curvature centers of the plurality of first phase terminals are disposed to be different, second curvature centers of the plurality of second phase terminals are disposed to be different, and a position of a curvature center of the first neutral terminal is the same as a position of a curvature center of the second neutral terminal.

The invention relates to a textile heat-insulating coating, and a preparation method and a using method thereof. The textile heat-insulating coating mainly comprises, by weight percent, 20-35% of film-forming base material, namely polydimethylsiloxane, 10-25% of heat-insulating functional filling, namely rutile titanium oxide, 60-80% of N, N-dimethylformamide, and 1-2% of sodium hexametaphosphate. Compared with the prior art, the textile heat-insulating coating has the advantages that the raw materials are environment-friendly, easy to obtain and low in cost, processing technology is simple, and the heat-insulating coating is high in adhesion, high in weatherability and excellent in heat insulation.

The invention discloses a thermosetting resin material for an automotive relay shell. The thermosetting resin material is characterized in by comprising the following raw materials including, by weight, 100-130 parts of epoxy resin E40, 10-12 parts of methylhexahydrophthalic anhydride, 3-4 parts of trimellitate, 2-3 parts of PTMG, 10-12 parts of zirconium carbonate, 0.7-1 part of ethoxylated alkyl phenol ammonium sulfate, 0.1-0.2 part of hexamethyl cyclotrisiloxane, 6-9 parts of maleic anhydride, 0.1-0.5 part of dicumyl peroxide, 17-20 parts of 3-(trifluoromethyl) benzophenone, 2-3 parts of hydroquinone, 0.1-0.4 part of 2-thiol group truxene imidazole and 3-4 parts of straw powder. The resin material has very good toughness and impact resistance, and is high in surface intensity, waterproof, good in corrosion resistance, high in protectiveness on a relay and good in insulation stability; and according to the thermosetting resin material, an acid anhydride grafting reaction is adopted, so that the dispersibility of fillers between the resin is effectively improved, and the comprehensive performance of the finished product material is improved.

The invention discloses a preparation method of a rubber and plastic heat preservation pipeline system. The assembly of the rubber and plastic heat preservation pipeline system is finished under the action of pressure through adopting a negative pressure guiding pipe assembly and an air pressure balance guiding head. The preparation method provided by the invention has the advantages that the installation is simple, convenient and rapid, the degree of mechanization is high and the like; the rubber and plastic heat preservation pipeline has good heat retaining property, weather ability and stability, and the service life of the rubber and plastic heat preservation pipeline is prolonged.

The invention discloses a preparation process of a laminated solid wood board, which comprises the following steps: performing one-step polishing treatment on a log board, and performing carbonization treatment to obtain a board A; after dipping maintenance treatment is completed on the plate A, second-step polishing treatment is conducted, and a plate B is obtained; after the board B is coated with an insulating layer, one-step hot pressing treatment is conducted to obtain a board C; after the board C is coated with a waterproof layer, two-step hot pressing treatment is conducted, and a board D is obtained; after veneers are attached in the wood grain direction of the plate D, one-step cold pressing treatment is conducted, and a plate E is obtained; after painting and transfer printing are conducted on the board E, two-step cold pressing treatment and three-step polishing treatment are conducted, and a laminated solid wood board is obtained; a laminated solid board is also disclosed. A specific process system is disclosed, the problem that the comprehensive performance of a conventional laminated solid wood board is affected due to large residual internal stress is solved, in the whole preparation process, the water content of the board is strictly controlled, the internal residual stress of the board is eliminated, the defects of warping, internal cracking and the like of the board are overcome, and the product quality of the board is further improved.

The invention discloses a semi-hard state winding wire, which sequentially comprises a conductor, a first insulation layer and a second insulation layer from inside to outside, wherein the first insulation layer adopts a polyamide-imide coating; the second insulation layer adopts mixed fiber formed by polyester fiber and glass fiber through laying to be wrapped on the first insulation layer, pre-heating is firstly carried out, baking is then carried out to enable the polyester fiber to be melted to liquid, the liquid fills pores and the gap of the glass fiber, the mixed fiber forms a non-loosecompact structure and is well attached outside the polyamide-imide coating, and thus, the electrical properties of a product are not influenced even if the product is subjected to friction and knocking. The thickness of a product insulation layer is 0.18 mm to 0.22 mm, and an inorganic content is 22% to 32%. According to the semi-hard state winding wire obtained in the above method, 4a and 4b bending insulation without cracking are achieved, the bending breakdown voltage is no smaller than 1300 V, the linear breakdown voltage is no smaller than 2500V, the insulation layer with 20% stretchingdoes not lose adhesion, 30 min heating in an oven of 180 DEG C and taking out to cool to room temperature for 6a and 6b bending are carried out, the insulation layer does not crack, the insulation stability is excellent, and the conductivity is no smaller than 100%IACS.

A bipolar electrostatic chuck which has excellent dielectric breakdown strength and provides excellent attracting performance. The bipolar electrostatic chuck eliminates difficulty in peeling off a sample from a sample attracting plane as much as possible after application of a voltage to electrodes is finished. The bipolar electrostatic chuck is provided with a first electrode and a second electrode in an insulator and permits a surface of the insulator to be the sample attracting plane. The insulator has the first electrode, an interelectrode insulating layer and the second electrode in this order from the sample attracting plane in the depth direction. The second electrode has a region not overlapping with the first electrode in a normal line direction of the sample attracting plane.

The invention provides a Cr2O3 doped silicon dioxide aerogel material and a preparation method thereof. The preparation method of the Cr2O3 doped silicon dioxide aerogel material comprises the following steps: taking a silicon source as a precursor, adopting an inorganic compound containing the Cr element and an organic compound as doping ions, mixing the compounds with a solvent, a complexing agent and a catalyst to form a composite sol, conducting impregnation technology to be compounded with reinforced fibers, carrying out gelatinizing, ageing, solvent replacement, supercritical carbon dioxide drying, high-temperature pretreatment and other technologies to obtain the product. The preparation method disclosed by the invention is to conduct metal Cr doping and modification on the aerogel through a complexing-gelatinizing method, skillfully combine the complexing reaction with the gelatinizing reaction to increase the complexing force of the metal Cr doping ions in the gel system, effectively restrain the phenomenon that the Cr is not uniform in distribution as the Cr ions are migrated during the follow-up treatment process of the gel, so that the diffusion effect of the complexing-gelatinizing method is uniform and stable, and the complexing-gelatinizing method is better than the in-situ doping method. The aerogel obtained by the complexing-gelatinizing method is treated in advance at high temperature, so as to enable the internal reaction to be conducted thoroughly under high-temperature action, then transform the aerogel to be the Cr2O3 doped stable aerogel structure, and facilitate the pore structure and the heat-insulating property to be stable.

The invention relates to a production method of a heat-insulating canvas fabric. The production method is as follows: yarn feeding, loop withdrawal, needle narrowing, knitting needles leading out new cotton thread, hemp thread or chemical fiber from the yarn guide and inserting it under the needle hook, bending the yarn, forming The adjacent knitting needles with an interval of 1 or 2 needles are selected to participate in knitting. The circle is withdrawn and new cotton thread, hemp thread or chemical fiber is padded. The 1 or 2 needles between the adjacent knitting needles are not selected and quit the work, so that the old The coil is kept in the needle hook, and the canvas blank is obtained by circular weaving with N-way single-way weaves. The odd number of N-way single-way weaves is woven with cotton thread or hemp thread, and the even number of N-way single-way weaves is woven with chemical fiber. N-way single-way Repeat every 3 multiples of the tissue to the needle selection step, pass through the glue tank of the heat-insulating coating glue, and then dehydrate and heat-set, with less dispersibility, smooth fabric surface, lower defect rate, tight horizontal and vertical structure, and small shrinkage rate , can reduce the production process, improve the heat insulation effect and stability.

The invention relates to soldering flux for lead-free solder and a preparation method of the soldering flux. The soldering flux comprises, by mass, 2.0-4.0% of activating agent, 0.05-0.5% of surfactant, 0.4-1.0% of film-forming agent, 18-30% of cosolvent, 0.1-0.4% of corrosion inhibitor and the balance deionized water. The soldering flux is free of rosin and less than 3% in solid content, so that solid residual quantity is less during soldering, ionic contamination degree is low, and cleaning is avoided after soldering. By using the deionized water as solvent, the water-soluble no-clean soldering flux is colorless, transparent, free of pungent smell, easy in raw material getting approach and low in cost. Activating components in the soldering flux are halogen-free, so that insulativity of a soldered circuit board is improved; by the aid of the film-forming agent, a dense protecting film is formed on the surface of the circuit board after the film-forming agent is subjected to a soldering procedure, and accordingly, electromigration of soldered residues is lowered, and insulation stability of the circuit board is improved effectively; and harm caused when organic soldering flux is used for soldering can be reduced, and the soldering flux meets the environment-friendly requirements.

The invention discloses a novel soldering flux which is prepared from the following raw materials in parts by weight: 1 to 2 parts of hexadecylsulfonic acid, 0.8 to 1.7 parts of fatty amine polyoxyethylene ether, 12 to 18 parts of a hydrazine hydroxycarboxylic acid compound, 3 to 5 parts of ammonia chloride, 17 to 26 parts of modified rosin, 2 to 4 parts of an activator, 0.5 to 1.5 parts of a surfactant, 0.6 to 1.3 parts of a film forming agent, 2 to 3 parts of a corrosion inhibitor, 0.6 to 1 part of an anti-oxidization agent and 35 to 65 parts of deionized water. According to the novel soldering flux, the deionized water is used as a solvent, so that the production cost is reduced, and the aims of environmental protection, stabilization and safety are fulfilled; and the novel soldering flux is high in adaptability to lead-free welding. Due to the relatively low solid content, a few of residues are retained after the novel soldering flux assists in soldering; the novel soldering flux is high in insulation resistance and meets the no-cleaning requirement.

The invention provides an epoxy potting method for an insulation box on an end portion of an electric generator. The method includes the steps of closing a connector through the mica insulation box and a tool, sealing the seam between the mica insulation box and the tool through epoxy putty, forming epoxy injection holes in the mica insulation box in advance, injecting potted epoxy into the epoxy injection holes through an epoxy potting device, solidifying the potted epoxy at the room temperature, and enabling the mica insulation box and the potted epoxy to form a whole after the tool is removed. The method overcomes the detects in the prior art, the insulation box obtained through the method is reliable in performance and simple in structure, production efficiency can be improved, labor intensity can be lowered, and the insulation effect is ensured.

The invention discloses a preparation process of a durable inspection tool for automobile window sealing strips, which includes the process steps of material selection of the inspection tool-parts processing and molding-surface treatment-assembly process; after the invention is fixed by a clamping device, the After finishing the deburring and grinding treatment, there is no need to reinstall and reinstall after changing the position. The rotation and adjustment of the position is completed through the control of the foot switch, which is efficient and flexible in operation; at the same time, the parts are painted before assembly. Most of the harmful substances will be volatilized, and the paint will be cracked under high temperature conditions, so that the toxic substances can be fully volatilized, and it can be used after the later assembly is completed, which enhances the overall non-stickiness, heat resistance, sliding properties, and Moisture resistance, wear resistance, corrosion resistance and other properties, while the topcoat has better moisture resistance, wear resistance and corrosion resistance than ordinary paint.