66results 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 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 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 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 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 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.