32results about How to "Performance electricity" patented technology

The invention provides a halogen-free glass fiber reinforced nylon resin and a preparing method thereof. The material comprises the following raw materials with the weight percentage: 38-55 percent of nylon 66 or nylon 6, 17-30 percent of halogen-free intumescent nylon flame retardant of phosphorus-nitrogen structure, 4-8 percent of toughening agent, 25-35 percent of glass fiber and 0.5-1.5 percent of other promoters.

The invention provides an airplane radome with a PMI foam sandwich structure and a design method and a manufacturing method of the airplane radome. By calculation of the incident angle of the radome,different regions are divided, the thickness of the corresponding optimal sandwich layer is designed, and PMI foams with different thicknesses are used in the different regions. By the design of the variable-thickness sandwich structure, the airplane radome has the advantage of high transmission efficiency, and an electric property required for design can be met completely. In the manufacturing method, the radome is formed by PMI foam blocks with different thicknesses, the sandwich layer are integrally formed after the blocks are assembled, by the variable-thickness sandwich layer, the requirement for the electric property of the radome is met to a maximum extent, the processing cost is reduced, the processing time is saved, and the problem that the transmission efficiency of the equal-thickness radome becomes poor due to change of an angle of incidence is solved.

The present invention relates to a memory device and the fabrication method thereof. A plurality of pairs of floating gates and a plurality of pairs of select gates are formed above each active region. After forming a dielectric layer on each floating gate and on each select gate, a plurality of pairs of word lines and a plurality of pairs of source lines are formed simultaneously. The word lines and the source lines are disposed in a direction vertical to the strip active regions. A plurality of source/drain regions is disposed in the substrate beside the word lines and the source lines. After forming a thick dielectric layer over the substrate, a plurality of source line contacts are formed in the thick dielectric layer for connecting the source/drain regions that are between each pair of source lines and at least connecting one of each pair of the source lines.

The invention relates to a limiting sliding fixing device which is installed on four installation legs (2) at the outer side of an antenna array (1). The limiting sliding fixing device comprises screws (3), screw spacers (4), first solid lubricating plates (5), second solid lubricating plates (6), sleeves (7), transitional spacers (8) and embedded blocks (9); the first solid lubricating plates (5) and the second solid lubricating plates (6) are respectively fixed on and under the installation legs (2) through sunk screws; long circular through holes which are identical in size are respectively formed in the middle parts of the first solid lubricating plates (5), the second solid lubricating plates (6) and the installation legs (2) and used for the sleeves (7) to insert into the installation legs (2), and the screws (3) penetrates through the sleeves (7) to be tightened into threaded holes in the centers of the embedded blocks (9); the screw spacers (4) are arranged below the head parts of the screws (3), and the transitional spacers (8) are arranged between the screw spacers (4) and the first solid lubricating plates (5).

The invention relates to the technical field of motors and provides a squirrel-cage type energy-saving motor, which comprises a base, a body, a front end cover, a rear end cover, a rotating shaft, a squirrel-cage type rotor mounted on the rotating shaft, a stator and a winding. An axial fan is mounted on the shaft on the outer side of the rear end cover. An oval fan cover is arranged on the outside of the axial fan. The squirrel-cage type rotor is includes a rotor core formed by stacking a plurality of cold-rolled silicon steel sheets and a squirrel cage. The squirrel cage has a double-layer squirrel cage structure and is composed of two aluminum alloy end rings and a plurality of copper guide bars. The aluminum alloy end rings are provided with two rings of circular through holes in the outer side edge. The copper guide bars are respectively inserted into the circular through holes. The two aluminum alloy end rings are respectively connected with the two ends of the rotor core. The beneficial effects of the invention are that the double-layer squirrel cage structure is arranged to form a stronger magnetic field, the rotor torque and the motor performance can be improved, and the energy-saving effect is better; and in addition, the rotor core is formed by stacking the cold-rolled silicon steel sheets, the iron consumption can be reduced, and the motor efficiency is increased.

The invention provides a radar echo attenuation composite material, which is composed of a wave-transmitting layer, an absorbing layer and a shielding layer from outside to inside, wherein the wave-transmitting layer is a continuous wave-transmitting fiber reinforced composite material, the absorbing layer is continuous wave-transmitting fiber cloth, a polymer resin adhesive and a radar wave absorbent, and the shielding layer is a carbon fiber reinforced composite material or a metal material. The invention also provides a preparation method of the composite material, which comprises the following steps: dispersing the radar wave absorbent in the polymer resin, coating the wave-transparent fiber cloth with the radar wave absorbent, flattening the fiber cloth and mounting the fiber cloth ona mold, and curing the polymer resin to form the radar wave absorbing cloth; cutting the radar wave absorbing cloth into strips, weaving the strips, and coating the surface with a glue solution to prepare an absorbing layer material is prepared; successively laying the wave-transparent fiber cloth, the absorbing layer material and the shielding material in a mold, and curing polymer resin to formthe radar echo attenuation composite material. The radar echo attenuation composite material has the advantages of excellent electrical properties and stable mechanical properties.

The invention discloses a radio frequency coaxial cable connector. The radio frequency coaxial cable connector comprises an outer conductor, an inner conductor and an insulator, wherein the outer conductor is of a barrel-shaped structure, and a stepped ring surface is arranged in a central through hole of the outer conductor; the insulator is arranged in the central through hole of the outer conductor and tightly attached to the stepped ring surface in the central through hole of the outer conductor; a through hole is formed in the middle of the insulator; the inner conductor penetrates through the through hole in the middle of the insulator and stretches into the central through hole of the outer conductor. The radio frequency coaxial cable connector is low in production cost, simple and practical in production process and assembly process and stable in performance.

The invention discloses a radio frequency coaxial cable connector and a processing and assembling process of the radio frequency coaxial cable connector. The radio frequency coaxial cable connector comprises an outer conductor, an inner conductor and an insulator, wherein the outer conductor is of a cylinder structure, and an annular stepped face is arranged in a center through hole of the outer conductor; the insulator is mounted in the center through hole of the outer conductor and is closely attached to the annular stepped face in the through hole of the outer conductor; a through hole is formed in the middle of the insulator; the inner conductor penetrates through the through hole in the middle of the insulator and extends into the center through hole of the outer conductor. The production and assembly process comprises the outer conductor forming process, the inner conductor forming process, the insulator forming process and the assembly process. The radio frequency coaxial cable connector is low in production cost, simple and practical in production process and assembly process and stable in performance.

The invention belongs to the technical field of cable manufacturing, and provides a deicing cable. The deicing cable is composed of inner cable cores, an insulation protective layer, outer cable cores, fillers and a frost-proof layer. The peripheries of the inner cable cores are covered with the insulation protective layer, the outer cable cores are distributed in gaps among the inner cable cores, heat generated after the outer cable cores are charged with electricity can deice effectively, and the frost-proof layer can effectively prevent the outer portion of the cables from being frozen. The deicing cable is reasonable in structural design, weight of the cable is reduced, and the deicing cable can deice and keep warm in normal electricity transmission, is good in frost-proof effect, can fast and effectively remove ice layers on the outer portion of the cable, is good in electric current transmission effect, good in weather ability and high in electric energy transmission efficiency, has certain rigidity, is good in torsional property, improves flexibility, can meet various requirements for electrical property and mechanical property, is simple in structure and good in practicability, and has good popularization and application value.

The invention discloses a power cable for an intelligent new energy automobile, which comprises a cable core. Three electric unit wire cores and one auxiliary detection unit for enabling a measurement module to accurately acquire the real-time working temperature are stranded to form the cable core; a filling rope is arranged in the gap of the cable core; the cable core is coated with non-woven fabric; a thermoplastic elastomer outer sheath or a dynamic vulcanization rubber outer protection layer is finally extruded in the outermost layer of the cable core; and the auxiliary detection unit is arranged in the center after the three electric unit wire cores are stranded. The power cable for the intelligent new energy automobile has the advantages that the flexibility is high; use in narrow space in the automobile and corner wiring is met; the tedious work of a wiring person is reduced; the working efficiency is improved and the production cost is reduced.

The invention discloses a surface treatment method for a cavity filter. The method comprises the following steps: S1, electroplating a cavity and a connecting member of the cavity filter with a firstmaterial for priming to enhance the binding force between the cavity and the connecting member; S2, electroplating the cavity and the connecting member of the cavity filter with a second material to enable the cavity and the connecting member to meet electrical property requirements of the cavity filter; S3, covering the cavity, and electroplating the connecting member with a third material to enable the connecting member to meet the requirements for corrosion prevention and wear resistance. Cavity priming is performed on the cavity and the connecting member of the cavity filter to enhance adhesion capacity and anti-corrosion capacity of the cavity and the connecting member to electroplated coatings; different electroplating treatment is performed on the cavity and the connecting member, electrical properties of the cavity of the cavity filter are realized, and corrosion prevention and wear resistance of the connecting member of the cavity filter are realized.

The invention relates to a super-smooth high-voltage cable semi-conductive internal shielding material and a preparation method thereof, and the preparation method solves the problem that in an existing preparation method, a semi-conductive shielding material is prone to thermo-oxidative aging in the extrusion process. And in the extrusion process, the cross-linking agent is decomposed to generate pre-crosslinking, so that the degree of finish of the extrusion surface is difficult to meet the ultra-smooth requirement. The semiconductive shielding material composition is prepared from the following components in parts by weight: 55 to 65 parts of a base material, 28 to 35 parts of conductive carbon black, 0.5 to 2 parts of a dispersing agent, 1 to 2 parts of a coupling agent, 1 to 3 parts of a lubricating agent, 0.6 to 1 part of an antioxidant and 0.9 to 2 parts of a cross-linking agent. The prepared ultra-smooth high-voltage cable semi-conductive internal shielding material has excellent electrical performance and mechanical performance, and no protrusion larger than 50 micrometers exists on the extrusion surface. The method is simple in production process, low in cost and easy to popularize and use.

The invention provides a method capable of improving activity of a nickel coating on the surface of a copper sheet, and mainly relates to a technological method for plating a nickel layer on the surface of the red copper sheet during production of copper-aluminium bimetallic cathode conductive contacts. The method comprises the steps of carrying out soda boiling for degreasing; carrying out acid pickling; carrying out surface coating on the copper sheet with a NaF solution of which the concentration is 45% to 60%; and carrying out dehydrogenation. According to the method, the copper sheet is coated through a Na<+> saline solution, so that effective bonding of molten aluminum and the nickel coating of the copper sheet is effectively controlled, and the nickel coating can meet mechanical properties and electrical properties of the conductive contacts.

The invention discloses a photoelectric composite cable, and specifically relates to a mooring optical cable capable of keeping power on under the condition of drawing. The mooring optical cable comprises an outer sheath and a polyester belt. The outer sheath is arranged in an extruding manner outside the polyester belt. Two electrical signal lines, four aramid yarns, two optical units and two power lines are arranged inside the polyester belt. The two electrical signal lines, the four aramid yarns, the two optical units and the two power lines are twisted into a cable in a certain direction,and are wrapped in the polyester belt. Nanofluids are used as a conductor, and the nanofluids are composed of, by weight, 30-60 parts of nano carbon powder, 40-60 parts of nano copper powder, 60-80 parts of flaky graphite powder and 10-30 parts of nano bismuth alloy.

The invention belongs to the technical field of antennas and particularly relates to a support vector machine-based structure design method for a sandwich microstrip antenna. The support vector machine-based structure design method for the sandwich microstrip antenna is characterized by comprising at least twelve steps of building a structural parameter optimization model of the sandwich microstrip antenna under the condition that mechanical performance indexes meet requirements, selecting out reasonable structural parameters, and the like. The support vector machine-based structure design method for the sandwich microstrip antenna is used for guiding or assisting a designer to design the structural dimension parameters of the sandwich microstrip antenna.

The invention provides an environment-friendly heating electric wire. An ultra-thin chromium-aluminum or chromium-nickel alloy steel belt is utilized as a heating conductor. The environment-friendly heating electric wire is characterized in that for the ultra-thin chromium-aluminum alloy steel belt, the weight ratio between chromium and aluminum is 21:6, and alternatively for the chromium-nickel alloy steel belt, the weight ratio between chromium and nickel is 20:35; the heating conductor meets the standard satisfying the equation that width mm*thickness mm=Jmm-25mm*0.025mm-0.6mm; an insulating layer with a thickness ranging from 0.3mm to 0.5mm wraps the heating conductor, a shielding layer wraps the insulating layer, and an external protective layer with a thickness ranging 0.3mm to 0.5mm wraps the shielding layer. According to the environment-friendly heating electric wire, no black smoke comes out in open fire, and produced harmful substance and poisonous gas are little. The producing and manufacturing process is not complex, the insulating layer and the protective layer are strong in adhesive force, the tightness degree of combination is high, a nylon layer is completely sealed and has no air, the surface is fine, smooth, round and beautiful, and the environment-friendly and inflaming retarding functions are achieved. In addition, the environment-friendly heating electric wire has the advantages of being water proof, damp proof, resistant to oil, abrasion and corrosion, and the like.