67results about How to "Good production technology" patented technology

The invention discloses a drum motor stator structure. The drum motor stator structure comprises a stator core, end insulation, stator slot paper and stator coil windings, wherein the stator slot paper is arranged in a stator slot of the stator core; the end insulation is arranged on the two end surfaces of the stator core; the stator coil windings are wound on the end insulation; a drum shell is arranged on the outer edge of the stator core; the stator core adopts a stripped stator core; the stripped stator core is bent to be annular and is arranged in the drum shell; and the outer wall of the annular stripped stator core and the inner wall of the drum shell are in interference fit. In the drum motor stator structure, the stripped stator core structure is adopted; and in the state of naturally unfolding the stripped stator core structure, the volumes of the coil windings in the stator slot are increased, the slot fullness rate is improved, the work efficiency of the motor is greatly improved, and the motor performance is very high.

The invention relates to an anti-static thick type polyester film which includes three layers of coextruded films. Calculated by the weight percentage, the film of a core layer is provided with 97 to 99.5 percent of polyester chips and 0.5 to 3 percent of an antistatic agent; the film of a surface layer is provided with 90 to 96 percent of the polyester chips and 4 to 10 percent of the antistatic agent; the thickness of the film of the core layer is between 0.075 to 0.31mm; the thicknesses of the films of the two surface layers are equal; besides, the thickness of the film of the surface layer is between 0.006 to 0.02mm. The invention adopts the anti-static polyester film of ABA three-layer structure to modify the conductive performance of a polyester substrate; especially, the film of the surface layer has high concentration of the antistatic agent and the antistatic agent added in the polyester substrate is capable of partially moving to the surface of the film; the anti-static thick type polyester film has the advantages of scrub resistance and solvent resistance, thus leading the polyester film to have the anti-static function for a long period.

The invention relates to an electric excitation permanent magnet switch, a reluctance motor for the electric excitation permanent magnet switch and an electric excitation method. In the electric excitation permanent magnet switch, two magnetic poles of a permanent magnet are respectively connected with both ends of an iron core on which magnet exciting coils are wound by two soft magnets; and salient poles are arranged on the soft magnets. In the reluctance motor, the switch is used as basic components of a stator and a rotor, and the two magnetic salient poles of each component are arranged in an axial direction; the salient poles of the stator component and the rotor component are arranged oppositely, and air gaps are reserved between the salient poles; and the magnet exciting coils of the stator component and the rotor component at the axial symmetrical position are connected in series or in parallel and then are used as a phase line respectively to be connected to an excitation control power supply. The invention also provides a combination motor formed by connecting motor monomers by using a shaft in a rotary and dislocation mode and a method for the simultaneous diphase electric excitation of the stator component. The switch and the motor save energy, and have low magnetic loss and high magnetic efficiency; and the combination motor with the diphase electric excitation realizes the subdivision of stepper angles, and improves running stability, control accuracy and output power.

The improved oil resistant semi-conductive cable shielding material consists of butadiene-acrylonitrile rubber or hydrogenated butadiene-acrylonitrile rubber 100 weight portions, conducting carbon black 50-80 weight portions, graphite powder 15-30 weight portions, plasticizer 15-20 weight portions, dithio tetramethyl thiram and alphatic polysulfide 1.0-3.0 weight portions, dibenzothiazole disulfide and zinc diethyl dithio amino formate 1.0-2.0 weight portions, zinc oxide and stearic acid 8.0-10.0 weight portions. Compared with available technology, the present invention has the advantages of excellent conductivity, volume resistivity not greater than 50 ohm.cm, high tensile strength up to 18 MPa, high oil resistance and other advantages.

The invention relates to a torque-enhanced SRM (switched reluctance motor) which is characterized in that the stator of the SRM is formed by even biconvex pole iron core assemblies with magnet exciting coils, wherein the even biconvex pole iron core assemblies are magnetically separated mutually and uniformly arranged on the inner wall of a motor shell annularly; two magnetic salient poles of each assembly are arranged in an axial direction; the rotor of the SRM is formed by even stripped biconvex pole iron cores which are arranged uniformly in a radial direction along an axis of rotation, and two convex poles at two ends of each stripped biconvex pole iron core are arranged in the axial direction; two magnetic convex poles of each assembly on the stator are arranged opposite to the two convex poles at two ends of each stripped biconvex pole iron core, and air gaps exist between the two magnetic convex poles of each assembly on the stator and the two convex poles at two ends of each stripped biconvex pole iron core; and the magnet exciting coils of two stator assemblies in an axial symmetry mode are connected in series or in parallel and then taken as one phase which is accessed to an excitation control power supply. In the invention, the biconvex pole iron core assemblies with the magnet exciting coils are used for replacing the stripped biconvex pole iron cores on the rotor, thus creating a motor in a similar structure. The enhanced SRM is less in magnetic loss, high in efficiency, low in impact jitter, stable in dynamic rotation and high in control accuracy.

The invention relates to a white polyester solar cell back film and a preparation method thereof, belonging to the polyester film field. The white polyester solar cell back film consists of a polyester chip and a white polyester master batch, wherein the weight percent ratio of the polyester chip and the white polyester master batch is between 1.0:1 and 9.0:1; the white polyester master batch comprises the following components in weight percent: 35 to 89.4 percent of polyester chip, 0.5 to 10 percent of silicon dioxide, 10 to 50 percent of titanium dioxide and 0.1 to 5 percent of ultraviolet light absorbent; moreover, the silicon dioxide undergoes organic surface treatment with the particle diameter ranging between 10 and 100 nm, and the titanium dioxide also undergoes organic surface treatment with the particle diameter ranging between 100 and 1,000 nm. The white polyester solar cell back film has the characteristics of excellent light tight performance, insulativity, aging resistance and barrier property.

The invention relates to a torque-enhanced type switched reluctance motor. A stator of the motor is composed of even numbers of double-salient-pole iron core assemblies which are magnetically isolated to each other, provided with magnet exciting coils and uniformly and annularly arranged along the inner wall of a shell of the motor, and double salient poles of each assembly are axially arranged; a rotor of the motor is composed of even numbers of stripped double-salient-pole iron cores which are uniformly arranged along the radial direction of a rotating shaft, and double salient poles at two ends of each stripped double-salient-pole iron core are axially arranged; the double magnetic salient poles of each assembly on the stator and the salient poles at two ends of each stripped double-salient-pole iron core on the rotor are arranged oppositely and provided with gaps interbetween; and the magnet exciting coils of the two stator assemblies on axisymmetric positions are connected in series or parallel to be used as a phase to be connected to an excitation control power supply. A motor with a similar structure is provided through replacing the stripped double-salient-pole iron cores on the rotor with the double-salient-pole iron core assemblies provided with the magnet exciting coils. The motor provided by the invention is low in magnetic loss, high in efficiency, low in impact chatter, stable in rotation and high in control precision.

The invention discloses a 790 MPa-grade high-strength and high-toughness welding rod for water and electricity and a preparation method thereof. The welding rod consists of low sulfur, a phosphorus welding core, and a cover for coating the surface of the welding core; and the cover includes 40-42 mass parts of carbonate, 15-18 mass part of fluoride, 4.5-7.5 mass parts of rutile, 10-12 mass parts of silicon dioxide, 6-8 mass parts of nickel powder, 2.3-2.7 mass parts of molybdenum iron, 6-8 mass parts of electrolytic manganese, 8-10 mass parts of iron powder, 0.5-1.0 mass part of pure soda, 1.5-2.0 mass parts of sodium alginate, and 0.10-0.15 mass part of graphite. Compared with the prior art, the welding rod is stable in arc, low in splashing, excellent in deslagging, free of downwards flowing welding molten iron in vertical and pitching positions, easy to remove slag, beautiful in molding and excellent in all-position operation performance.

The invention provides a method for preparing a flaky unsaturated polyester plastic composite material of a composite material end plate for a pre-stressed pile. The method comprises the following steps of: preparing epoxy resin paste; and producing and curing an epoxy flaky molding material, wherein a middle core material of the epoxy flaky molding material consists of fibers which are dipped inthe epoxy resin paste; and the upper surface and the lower surface of the material are covered by a polyethylene film. The invention also provides a method for preparing the composite material end plate for the pre-stressed pile from the flaky unsaturated polyester plastic composite material. The composite material end plate provided by the invention can meet the requirements on pre-stressing tension in the process, has high manufacturability, can form different shapes according to the shape of the pile, has high corrosion resistance performance and can meet the requirement of various erosionenvironments without special treatment.

The invention discloses a high-performance and weather-proof steel welding electrode for non-spraying bridge steel and a preparation method of the high-performance and weather-proof steel welding electrode. The high-performance and weather-proof steel welding electrode comprises a low-sulfur-and-phosphorus core wire and a coating covering the surface of the core wire, wherein the coating is prepared from components as follows: 42-45 parts by weight of carbonate, 15-19 parts by weight of fluoride, 6-8 parts by weight of rutile, 10-11 parts by weight of silica, 4-5 parts by weight of electrolytic manganese, 1-1.2 parts by weight of nickel powder, 1.2-1.4 parts by weight of chromium metal, 0.85-1.0 part by weight of coper powder, 10-12 parts by weight of iron powder, 1.8-2.0 parts by weight of an adhesive and 0.2-0.25 parts by weight of graphite. Compared with the prior art, the electrode is stable in electric arc, low in splashing, good and easy in sediment separation, attractive in molded appearance and good in all-position operating performance and has the characteristics of excellent low-temperature impact property, good low-temperature toughness at subzero 40 DEG C and high corrosion resistance.

The invention discloses a special sizing agent for chopped strands for strengthening phenolic resin, and the sizing agent is mainly prepared by silane coupling agent, organic weak acid, cationic lubricant, organic antistatic agent, vinyl emulsion, polyvinyl acetate emulsion, epoxy emulsion and deionized water. The special sizing agent for the chopped strands for strengthening the phenolic resin can lead the alkali-free chopped strands coated with the sizing agent component to be applicable to strengthening phenolic resin through selection and control of the components and the contents thereof, and the sizing agent has good stability and good production processability and can finally obviously improve the thermal resistance, the mechanical performance and the wear resistance.

The invention discloses a motor. The motor comprises a rotating shaft, a rotor assembly, a stator core, a stator winding, an end insulation piece, a casing, a front end cover, a rear end cover, a circuit board and a box cover, wherein the rotating shaft is connected with the rotor assembly, the stator core is sleeved on the rotor assembly, the end insulation piece is installed at an end surface of the stator core, the stator winding is wound on the stator core, the stator core is connected with the casing; the front end cover and the rear end cover are arranged at two ends of the casing, the rotating shaft is supported on bearings of the front end cover and the rear end cover, the box cover is installed on an internal side bottom surface of the rear end cover, and the circuit board is arranged in the box cover. The motor further comprises a connecting wire clamp; the connecting wire clamp is installed on the end insulation piece; and one end of the connecting wire clamp is electrically connected with a wire end of the stator winding, and the other end of the connecting wire clamp is electrically connected with an insertion sheet on the circuit board. The motor is advantageous in structural simplicity, easiness in assembly, low cost and excellent manufacturability.

The invention belongs to the technical field of welding materials, and particularly relates to a stainless steel electrode welding core with the minimum temperature rise, a stainless steel electrode and preparation and application. The stainless steel electrode welding core with the minimum temperature rise adopts the seamless flux-cored wire way and includes outer skin and a powder core, and thepowder core comprises the following components by mass percentage: 39-41% of metal nickel, 48-50% of metal chromium, 8-8.5% of molybdenum, 1-2% of graphite and 1-2% of potassium titanate. The invention further provides the stainless steel electrode, the electrode comprises the stainless steel electrode welding core with the minimum temperature rise and skin, the outer diameter of the electrode canbe consistent with a conventional electrode, the welding process performance is excellent, the electrode redness tendency is low, the electrode is suitable for the large standard welding, the gas porosity susceptibility is low, and the excellent mechanical properties and corrosion resistance are achieved.

The invention discloses a miniaturized large-range gas density relay comprising a signal mechanism and an indicating value display mechanism which are connected together. A bellows for detecting the density of gas in a sulfur hexafluoride electrical device and a microswitch serving as a contact are arranged in the signal mechanism. The indicating value display mechanism includes a display Bourdontube, a display temperature compensation element, a display end base, a machine core, a dial, a pointer and a display base. One end of the display Bourdon tube and one end of the display temperature compensation element are fixed to the display end base, the other end of the display Bourdon tube is connected to the display base, the other end of the display temperature compensation element is connected with the machine core sequentially through a display connecting arm and a display connecting rod or the other end of the display temperature compensation element is directly connected with the machine core, and the pointer is mounted on the machine core and arranged in the front of the dial. A junction box is fixed to a display base disc or a casing, the junction box is provided with a wiring base and a cable outlet, the vacuum degree can be displayed during vacuumizing, and the miniaturized large-range gas density relay is very easy to popularize and apply.

The invention belongs to the technical field of welding materials, and specifically relates to an electrode coating, an electrode with low crack sensitivity and preparation and application thereof. The electrode coating comprises the following components in percentage by mass: 8-12% of marble, 3-5% of dolomite, 32-38% of rutile, 6-8% of dehydrated potassium feldspar, 3-5% of dehydrated mica, 2-4%of fluorite, 1-2% of potassium fluoroaluminate, 11-13% of chrome, 2-4% of ferrotitanium, 1-2% of rare earth ferrosilicon, 4-6% of manganese, 2-4% of zircon sand, 1-3% of rare earth fluoride, 2-4% of wollastonite, 1-2% of sodium carbonate, 1-2% of CMC, 1-2% of potassium titanate, 0.5-1% of bismuth oxide, and 0.5-1% of iron oxide red. The invention also provides the electrode with low crack sensitivity. The electrode is small in welding splashing, high in spreading and fusion performance, stable in electric arc, easy to deslag, nice in formed shape, low in crack sensitivity, and outstanding in mechanical property.

The invention discloses a detection box comprising a detection box body and a box cover. The detection box body is a cuboid, protrusions are arranged in the detection box body, bosses directly facing the protrusions are arranged on the box cover, a snap is arranged on each boss, and a snap fixing groove is arranged in each protrusion; when the detection box is closed, each snap is embedded in the corresponding snap fixing groove, and the end face of each protrusion is attached to the end face of the corresponding boss; a plurality of circuit board brackets are arranged in the detection box body. The detection box has the advantages that the detection box is neat in appearance, convenient to mount, more compact in overall structure and simple and reliable in assembly and has good production manufacturability, screw-free design is adopted for product assembly, and the internal space of the detection box body is utilized effectively.

The invention discloses an iron-based subnano alloy with good production processability and a preparation method thereof. The composition expression of the alloy is Fe a Si b B c Cu d m e x f , where M is at least one element of Ti, Zr and Hf, X is at least one element of C, Ge, V, Cr, Mn, Mo, W, Zn and Sn, and satisfies the following conditions: 75≤a ≤86, 2≤b≤9, 10≤c≤20, 0

The invention belongs to the field of oil production equipment, and particularly relates to a carbon fiber continuous sucker rod provided with a continuous flocculent wear-resistant layer internally. The carbon fiber continuous sucker rod comprises a carbon fiber core body, the wear-resistant layer and an epoxy resin layer, a rough yarn layer is arranged at the outside of the carbon fiber core body, the wear-resistant layer is arranged at the outside of the rough yarn layer, a spun yarn layer is arranged at the outside of the wear-resistant layer, and the epoxy resin layer is arranged at the outside of the spun yarn layer; the rough yarn layer is made of aramid fibers with the fineness of 3000 D, the wear-resistant layer is made of flocculent polypropylene fiber strips in a coating mode, and the spun yarn layer is made of aramid fibers with the fineness of 1100 D; and the length directions of the carbon fibers, the aramid fibers and the polypropylene fiber strips are all consistent with the axis direction of the sucker rod. According to the carbon fiber continuous sucker rod provided with the continuous flocculent wear-resistant layer internally, polypropylene fiber adopted is of a flocculent structure, epoxy resin can be more fully immersed among all fiber filaments in the polypropylene fiber strips, so that the combination degree of wear-resistant materials and the epoxy resin and the immersing degree of the epoxy resin are enhanced greatly, and therefore the wear-resistant performance of the wear-resistant materials can be exerted fully.

The invention discloses a reluctance machine. The reluctance machine comprises multiple layers of stator cores and multiple layers of rotor cores which are formed in a lamination way, the reluctance machine is characterized in that each stator core is formed by laminating a first punching sheet and a second punching sheet in a staggered way, the first punching sheet and the second punching sheet are inserted to each other and are cut in a suit way, the first punching sheet and the second punching sheet respectively comprises N punching sheet units which are connected by connection parts, eachpunching sheet unit comprises a yoke part and a tooth part, mutual surfaces of adjacent yoke parts after ring formation are in contact to form a gap, gaps of adjacent layers are not in the same axialcross section, and a salient pole of a rotor is made of a magnetic conduction material of which the quality is lower than that of a stator. The reluctance machine is good in manufacturing process andhas the advantage of automatic manufacturing on a large scale; and moreover, the performance of the reluctance machine is improved, the material utilization rate is improved, and the motor cost is reduced.

The invention discloses a composition, a coating, a Q690 coating-free bridge steel welding rod and a preparation method thereof. The composition comprises, in percentage by mass, 9.5-11.5% of CaCO3, 4-5% of CaF2, 1-2% of TiO2, 1-2% of SiO2, 1.25-1.5% of Mn, 0.8-1.20% of ferrosilicon powder, 0.6-0.675% of ferromolybdenum powder, 0.025-0.05% of C, 0.05-0.50% of Cr, 0.2-0.3% of Cu, 1.3-1.5% of Fe, 0.1-0.15% of Na2CO3, 0.1-0.15% of CMC, 0.15-0.20% of sodium alginate and 1.7-1.9% of Ni. The coating is formed by coating and curing the composition. The welding rod comprises a core wire and the coating covering the surface of the core wire. The welding rod has good welding process properties and mechanical properties.

The invention discloses a cooling tower sprinkler, which comprises a reverse supporting plate and a water sprinkling basin. A cover plate is fixed to the top of the water sprinkling basin through bolts. A fixed bottom plate is fixed to the cover plate through bolts. A water inlet pipe is welded to the fixed bottom plate. The top of the water inlet pipe is provided with a flange face. A bulged centering boss is arranged at the top of the water inlet pipe. The reverse supporting plate is fixed to the lower side of the cover plate through bolts. Side sealing plates are fixed to the two sides of the reverse supporting plate through bolts. An anti-impact plate is fixed between the two side sealing plates through bolts. The water sprinkling basin is arranged on the outer side of the reverse supporting plate. The water sprinkling basin is fixedly connected with the cover plate through bolts. Sprinkling protection flanges are arranged on the two sides of the lower part of the water sprinklingbasin. 2-5 rows of sprinkler heads are evenly embedded to a bottom plate of the water sprinkling basin, and each row includes 4-10 sprinkler heads. Each sprinkler head comprises a head flange at the top, a head main pipe on the lower part and an internal head nozzle. The cooling tower sprinkler has the beneficial effects that the device is low in vibration and noise; the impact of inlet water on the device is less; and the manufacturability of the device is good, and transportation and installation are convenient.

The invention provides a telescopic truss arm, which comprises at least two arm sections (1) in nested arrangement, and a extending / retracting mechanism (2) for extending / retracting the arm sections (1), wherein each arm section (1) includes a plurality of chord members (3) each having a round cross section, and a plurality of web members (4) connecting the chord members (3). The invention also provides engineering machinery including the telescopic truss arm mentioned above. With the inventive telescopic truss arm, the length of the truss arm can be conveniently adjusted. In addition, the chord member can adopt a round tube with good processibility, high linearity and torsion, various specifications of selectable high-strength materials, and low cost, compared with a conventional square tube, to consequently increase the chord member selection range of the arm section and lower the cost of the telescopic truss arm.

The invention provides a 900 MPa-grade high-strength high-toughness low-hydrogen welding rod and a preparation method thereof. The 900 MPa-grade high-strength high-toughness low-hydrogen welding rod is composed of a core wire and a coating wrapping the outer layer of the core wire. The coating comprises, by weight, 38-45 parts of carbonate, 18-24 parts of fluoride, 3-6 parts of titanium dioxide, 3-6 parts of quartz, 6-8 parts of ferrotitanium, 1.3-2.0 parts of ferrosilicon, 8-12 parts of nickel powder, 1.6-2.4 parts of ferromolybdenum, 0.3-0.8 part of chromium metal, 3-5 parts of electrolyticmanganese, 0.6-1.0 part of sodium carbonate and 0.05-0.15 part of ferro-boron. The welding rod is good in coating and pressing performance, smooth and compact in surface, high in yield and free of eccentricity. During welding, welding arcs are stable, splashing is little, welding lines are fine, wettability of a weld bead and the two sides of a groove is good, and a slag shell can automatically fall off. All-position welding performance is excellent, and weld joint forming is attractive.

The invention discloses a composition, a coating, Q690 bridge steel welding rod for coating free and a preparation method thereof. The component mass fraction of the composition is: CaCO 3 : 9.5~11.5%, CaF 2 : 4~5%, TiO 2 : 1~2%, SiO 2 : 1~2%, Mn: 1.25~1.5%, ferrosilicon powder 0.8~1.20%, ferromolybdenum powder 0.6~0.675%, C: 0.025~0.05%, Cr: 0.05~0.50%, Cu: 0.2~0.3%, Fe: 1.3~1.5%, Na 2 CO 3 : 0.1-0.15%, CMC: 0.1-0.15%, sodium alginate 0.15-0.20%, Ni 1.7-1.9%. The coating is formed by coating and curing the composition; the welding rod includes a welding core and a coating coated on the surface of the welding core; the welding rod has good welding performance and mechanical properties.

The invention belongs to the technical field of welding materials, and specifically relates to an electrode coating, an electrode with low crack sensitivity and preparation and application thereof. The electrode coating comprises the following components in percentage by mass: 8-12% of marble, 3-5% of dolomite, 32-38% of rutile, 6-8% of dehydrated potassium feldspar, 3-5% of dehydrated mica, 2-4%of fluorite, 1-2% of potassium fluoroaluminate, 11-13% of chrome, 2-4% of ferrotitanium, 1-2% of rare earth ferrosilicon, 4-6% of manganese, 2-4% of zircon sand, 1-3% of rare earth fluoride, 2-4% of wollastonite, 1-2% of sodium carbonate, 1-2% of CMC, 1-2% of potassium titanate, 0.5-1% of bismuth oxide, and 0.5-1% of iron oxide red. The invention also provides the electrode with low crack sensitivity. The electrode is small in welding splashing, high in spreading and fusion performance, stable in electric arc, easy to deslag, nice in formed shape, low in crack sensitivity, and outstanding in mechanical property.