55results about How to "Improve electromechanical performance" patented technology

The invention relates to an MXene coating textile force sensor and a fabrication method thereof. The MXene coating textile force sensor comprises a flexible substrate layer and a response transmissionlayer, wherein the material of the response transmission layer is MXene. Corresponding current response can be rapidly shown under different external pressures, the fabrication method is simple, andthe force-sensitive response device is high in sensitivity, low in cost and high in strength, has relatively good flexibility and can have very wide application prospect in the field of wearable smartclothing.

The invention discloses a method for improving the graphitization of a carbon material and the carburization degree based on a magnetic field and the catalysis. The method aims to apply the magnetic field induction and control the structural orientation of a newly generated graphite layer to ensure that the carbon material grows according to the preset orientation, thereby achieving the aim of improving the electromechanical properties of the carbon material. A proper amount of ferromagnetic catalyst is added into the carbon material, and then the high temperature carbonization and graphitization treatment is performed under the action of an externally-applied magnetic field; and the graphitization based on the carbon material is performed on the surface of the catalyst, and the ferromagnetic catalyst can directionally move on a molten carbon matrix under the action of the magnetic field to ensure that the graphitization is performed according to the direction of the magnetic field, thereby achieving the aim of controlling and affecting the structural orientation of the newly generated graphite layer to produce the carbon material with high orientation degree and high graphitization degree, and playing an active role in the increase and improvement of the electromechanical properties of the carbon material.

The invention relates to a method of selecting and preparing raw materials of 550kN-grade suspension-type porcelain insulator glaze. A 550kN-grade porcelain insulator glaze green body can be prepared by selecting 6-20 percent of kaolinite clay, 7-15 percent of talc, 20-40 percent of feldspar, 25-40 percent of refined quartz, 10-20 percent of calcined bauxite, 3-15 percent of calcium carbonate, 0-10 percent of medium porcelain powder and 0.001-1 percent of sodium silicate. The granularity of the clay is 20-40mu, and the granularity of other raw materials is 180-200mu.The glaze is prepared by using the raw materials and the method has good flowability and little multiviscosity, and is convenient for glazing operation; and the glazed and sintered porcelain green body has bending strength of being improved by 25-40 percent, therefore, the electromechanical properties and the insulating property of a porcelain insulator are improved and the quality of the porcelain insulator product is guaranteed.

The invention discloses an insulating structure for a 2MW wind driven generator. The insulating structure comprises a stator iron core, a rotor iron core, stator coils (3) embedded in the stator iron core, rotor coils (5) embedded in the rotor iron core, a mica tape coated and wound on the stator coils (3), nickel hydrazine nitrate (NHN) insulation (1) and a mica tap coated and wound on the rotor coils (5); inter-turn pads (4) are arranged among the stator coils (3); the stator iron core, the stator coils (3), the mica taps and the NHN insulation (1) are bonded together through solvent-free impregnated resin and vacuum pressure impregnation; and the rotor iron core, the rotor coils (5) and the mica tapes are bonded together through the solvent-free impregnated resin and the vacuum pressure impregnation. The invention has the advantages that: the electromechanical properties of the insulating structure can be improved, the aging speed of the insulating structure is slowed down, the service life of the insulating structure is long, the production cost is greatly reduced, and the problem of inter-turn insulation impact caused by a frequency converter is solved.

The invention provides a method for synthesizing lithium tantalite doped potassium sodium niobate ceramic. The method comprises the following steps of: ball-milling and mixing 5 to 15 molar percent of lithium tantalite, 42.5 to 47.5 percent of potassium niobate, and 42.5 to 47.5 molar percent of sodium niobate, adding 5 percent polyvinyl alcohol (PVA) and pelleting, and performing dry pressing and forming under the pressure of 200 MPa to obtain green blank; preserving heat at the temperature of 450 DEG C for 5 hours and removing adhesion of the green blank, filling a sample which is subjected to adhesion removal into multimode cavity microwave sintering equipment and sintering; and polishing the sintered sample to form a wafer with a diameter of 10 to 11mm and thickness of 0.5mm, coating silver, and then applying voltage of 3 to 4KV/mm in silicone oil at the temperature of 120 DEG C and polarizing for 30 minutes. In the method, the multimode cavity microwave sintering equipment is adopted, the sample is placed in a self-developed chromic acid lanthanum inlayer heat preservation body, zirconium oxide fiber is filled between the sample and the heat preservation body, and the heat preservation body of an outer layer has a corundum structure. The lithium tantalite doped potassium sodium niobate ceramic prepared by the method has the excellent electromechanical properties and lead pollution is avoided.

The invention relates to a transparent conductive ionic gel composition capable of realizing 3D printing as well as preparation and application of the transparent conductive ionic gel composition. Theconductive ionic gel is prepared from a composition and comprises polyurethane urea with a linear structure, ionic liquid and an organic solvent, and the ionic liquid accounts for 5%-80% of the massfraction of the polyurethane urea with the linear structure. Ionic conductive gels of different structures can be constructed through direct writing 3D printing, and the conductive ionic gel has goodmechanical strength (the stress is as high as 2.55 MPa, and the strain is as high as 2200%), high transparency (as high as 98%), high conductivity (as high as 3.18 S.m < 1 >) and a wide working temperature range. The conductive ionic gel has excellent electromechanical properties, so that the conductive ionic gel has good strain induction capability, can be used for preparing strain sensors and isused for monitoring various motions of a human body.

The invention relates to an axial vibration power-type piezoelectric ceramic transformer. The axial vibration power-type piezoelectric ceramic transformer comprises an input piezoelectric ceramic body and an output piezoelectric ceramic body, wherein a metal cylinder is arranged at each of the positions between the input piezoelectric ceramic body and the output piezoelectric ceramic body, outside the input piezoelectric ceramic body and outside the output piezoelectric ceramic body. According to the axial vibration power-type piezoelectric ceramic transformer, the metal cylinders have the effects of effectively improving the radiating effect of the transformer, increasing the power capacity of the transformer, and greatly improving the electromechanical performance of the transformer; meanwhile, the working frequency of the novel piezoelectric ceramic transformer can be changed very conveniently by changing the geometric sizes of the metal cylinders in the piezoelectric ceramic transformer, so that the piezoelectric ceramic transformer can be adapted to different application places; therefore, the cost can also be reduced.

The invention relates to a metal melting, ingot casting and plastic deformation processing process in the production field of aluminum and aluminum alloy pipe, bar, wire and section products. The invention provides a brand new metal solidification and semi-solid forming process for producing aluminum and aluminum alloy pipe, bar, wire and section products. The metal continuous solidification and semi-solid forming process provided by the invention is a new process for metal processing and forming based on the conform technology and combines casting and extrusion. In the forming process, a metal material is subjected to a crystallization solidification and plastic deformation process which is a combination of forced feeding and densification process under high pressure; and the expansion energy provided by external pressure increases the nucleation rate of the material, so that the material tissue is refined and is favorable for improving the electromechanical comprehensive performance of the aluminum and aluminum alloy products.

The present invention disclosed a kind of high -speed rail contact network for the production process of stick -shaped porcelain insulator. In the ball milling, the total quality of the raw materials in the ball milling is as follows, and the high aluminum aluminum soil is 30-45 % WT;Yonggaolin 15-20 % WT; Jiangbei clay is 2 to 6 % WT; 3-6 % WT in Kaolin in Guizhou; 1 to 3 % WT in Bi Ji mud; 3 to 5 % WT in Changshi; 0.3 ~ 0.5 % WT of nano alumina powder.The invention has prepared a stick -shaped porcelain insulator for the high -speed rail contact network with excellent mechanical and electrical performance through the selection of the raw material in the formula.; Porcelain inspection, electrical inspection, and glue are high, and the production quality is stable; the product meets the use of 350km/h and above high -speed rail contact network.

The invention discloses a production process of a rod-shaped porcelain insulator for a high-speed rail overhead contact system. In ball-milling, the following raw materials in weight percentage are adopted: 30 to 45%wt of calcined high-alumina bauxite; 25 to 30 %wt of Qingling kaoline; 15 to 20% wt of Xuyong kaoline; 2 to 6%wt of Jiangbei clay; 3 to 6%wt of Guizhou kaoline; 1 to 3% wt of Bijie mud; 3 to 5% wt of feldspar; and 0.3 to 0.5% wt of nanometre alumina powder. Materials in a formula are selected optimally to produce the rod-shaped porcelain insulator for the high-speed rail overhead contact system, and the mechanical and electrical properties of the rod-shaped porcelain insulator are excellent, and the bending damage load of the rod-shaped porcelain insulator is greater than 25kN, and the creepage distance of the insulator is above 1600mm, and the produced insulator has an excellent antifouling property, and the pollution flashover voltage of the insulator is increased to 36KV; the qualified rates of porcelain inspection, electric inspection and cementing of the insulator are high, and production quality is stable; and the product can be applied to high-speed rail overhead contact systems of 350Km/h or above.

A stator assembly including a frame structure having a stator teeth being circumferentially distributed around a longitudinal axis, wherein in between respective two neighboring stator teeth there is formed one stator slot; a winding system having a plurality of electric windings, wherein respectively one electric winding is wound around at least one stator tooth and is partially accommodated within two stator slots and each electric winding comprises an end winding portion which axially protrudes from the frame structure; and an insulation arrangement having a plurality of electric insulation devices, each insulation device surrounding a part of one electric winding is provided. Each insulation device includes an inner insulation portion being accommodated within the respective stator slot and an outer insulation portion protruding from the frame structure and surrounding a part of the respective end winding portion. The outer insulation portion includes an outer surface which includes elevated surface portions.