39results about How to "Improve performance matching" patented technology

The invention discloses a multilayered oxygen sensor with a sheet type structure. The multilayered oxygen sensor with the sheet type structure comprises a zirconium oxide sensitive layer, a reference air channel layer and a heating layer, wherein an outer electrode is arranged on the upper surface of the zirconium oxide sensitive layer and an inner electrode is arranged on the lower surface of the zirconium oxide sensitive layer; the multilayered oxygen sensor with the sheet type structure is characterized in that a first porous transition layer for adjusting thermal expansion coefficients of different structure layers and preventing the layers from being cracked is arranged between the zirconium oxide sensitive layer and the reference air channel layer; a second porous transition layer for adjusting the thermal expansion coefficients of the different structure layers and preventing the layers from being cracked is arranged between the reference air channel layer and the heating layer; the multilayered oxygen sensor with the sheet type structure is sequentially provided with the zirconium oxide sensitive layer, the first porous transition layer, the reference air channel layer, the second porous transition layer and the heating layer. According to the multilayered oxygen sensor with the sheet type structure, interlayer stress caused by thermal expansion of the different structure layers can be adjusted so as to prevent the layers from being cracked and guarantee the service life of the oxygen sensor; meanwhile, the stable performance between the different structure layers is guaranteed and the performance of the oxygen sensor is improved.

The invention provides a car roof power receiving system vibration-reduction connecting device and a method thereof. A damping layer is filled in the connecting device to change resonant frequency between a pantograph system and a car roof, reduce mechanical vibration transmitted to a car body by the pantograph system and improve performance matching between bow nets, current receiving stability and vibration reduction effect. The vibration-reduction connecting device is vertically connected between the pantograph and a car roof mounting seat and comprises a lining, an outer shell and a bottom plate. The lining, the outer shell and the bottom plate are all made of metal materials, and damping layers containing rubber materials and bonded and sealed through a vulcanization technology are filled among the lining, the outer shell and the bottom plate. Elastic connection is built between the power receiving system and the car body, vibration generated by air resistance from various directions can be weakened and absorbed by the power receiving system, and generation of rigid resistance on the power receiving system is avoided. Vibration of the pantograph and the vibration frequency of a power grid are matched better, and the matching relations of the bow nets and the current receiving stability are improved.

The invention provides a compound technology of a titanium carbide reinforced cast iron base brake disc. Titanium wire is weaved into a titanium wire mesh; the titanium wire mesh is coiled by one layer or multiple layers or overlaid into a titanium wire stereoscopic and netted skeleton which adapts to the shape of a brake disc; the stereoscopic and netted skeleton is pre-arranged in a brake disc cast; then liquid cast iron is poured into the cast and is filled in each gap of the stereoscopic and netted skeleton; after cooled, a titanium wire-cast iron binary material prefabricated body is obtained; the prefabricated body is put into a thermal treatment furnace and keeps temperature at carbide forming temperature; and the cast iron base brake disc of which the working surface is a titaniumcarbide reinforced cast iron compound layer is obtained. The invention has the effect on abrasion resistance and hard phase, gives full play to the favorable abrasion resistance of titanium carbide hard phase and good strength and toughness of cast iron, has convenient technology regulation and control and stable and reliable quality, and solves the problems of incomplete reaction of composite material, uneven wild phase particle distribution, weakened wild phase interface pollution and the like.

The present invention discloses a method for improving rotating bending fatigue performance of locomotive axle steel, and belongs to the technical field of metal material surface nanocrystallization. The method uses surface mechanical rolling treatment technology for surface nanocrystallization of locomotive axle LZ50 steel, and the treatment process is performed on a numerical control surface nanocrystallization treatment system. After the surface nanocrystallization treatment, a LZ50 steel surface structure is transformed into a gradient nano structure, the outermost layer crystal grain size is 10-50nm, the grain size gradually increases with the increase of the layer depth to the original grain size; the LZ50 steel surface nanocrystallization treatment state surface hardness is in a gradient distribution state, the outermost layer microhardness value is greater than 3.0GPa, and is significantly improved compared with the matrix hardness value; and the LZ50 steel surface nanocrystallization treatment state surface roughness is less than 0.4mum, and is significantly improved compared with the turning sate surface roughness. The rotating bending fatigue performance of the locomotive axle LZ50 steel is significantly improved by the surface nanocrystallization treatment.

The invention discloses a device for taking injection molding machine rubber pieces.The device comprises N sets of grabbing units which are of a same structure and are sequentially arranged front and back and installed on the bottom face of a connecting plate; each grabbing unit comprises a blowing cylinder and a main grabber and an auxiliary grabber which are installed on the two sides of the blowing cylinder, wherein the blowing cylinder is installed at the center of a cover plate through an air inlet pipe, the upper portion of the cover plate is connected with a slideway plate, the two sides of the slideway plate are provided with slide grooves which are used for installing a main rack and an auxiliary rack respectively, the center of the slideway plate is provided with a circular groove which is used for installing a gear meshed with the main rack and the auxiliary rack, the main grabber and the auxiliary grabber are installed on guide rods arranged at the bottom of the cover plate respectively, the main grabber is connected with the main rack, the auxiliary grabber is connected with the auxiliary rack, the two ends of the slideway plate are vertically connected with support plates of the guide rods, the main grabber is connected with a push rod of a sucker-rod air cylinder installed on the support plates, and the main grabber and the auxiliary grabber are driven by the push rods to achieve clamping or loosening; the grabbing units are connected with the connecting plate through the slideway plates.According to the device, the labor cost and the labor intensity are low, the working efficiency is high, the product qualification rate is high, a mold is easy to clean, and the harm of harmful gas to workers can be avoided.

A bipolar electrode for a resectoscope, comprising two metal sleeves (12), an insulating casing (11), a twin-core conductor wire (19), a semi-ring positive electrode (13), a loop electrode (14), two ceramic insulating tubes (15) and terminals (18). The front sections of the two metal sleeves (12) are branched and arranged at a distance; and the rear sections thereof are arranged to abut to each other side by side, and the insulating casing (11) is provided at the periphery of the rear section. The front ends of the two metal sleeves (12) are fixedly connected to the two ends of the semi-ring positive electrode (13) by means of the two insulating tubes (15) respectively, and the tail ends thereof are provided with the terminal (18). One conductor wire in the twin-core conductor wire (19) is electrically connected to the metal sleeve (12), and the other conductor wire penetrates into the metal sleeve (12) and is electrically connected to the positive electrode (13) at the front end. The loop electrode (14) comprises two metal tubes which are respectively arranged at the front parts of the two metal sleeves (12) and electrically connected to the metal sleeves (12), and the exterior of the rear sections of the two metal tubes of the loop electrode (14) and the front sections of the metal sleeves (12) are wrapped in an insulating layer sleeve (31). The bipolar electrode is safe and reliable, and has an improved operation effect.

The invention discloses a heat treatment process for improving the high-temperature tensile plasticity of a heat-resistant alloy, which comprises the following steps: 1) heating the deformed heat-resistant alloy to 100-150°C below the dissolution temperature of the second phase of the grain boundary, and performing solid solution treatment for 30 Cool after ~45min; 2) Heat the heat-resistant alloy treated in step 1) to within 50°C above the complete austenitization temperature, perform aging treatment and then cool. The invention controls the structure and morphology of the alloy through simple heat treatment, and under the condition that the high-temperature tensile yield strength at 650°C is not lost, the high-temperature elongation rate is increased by more than 70%.

The invention discloses a hexabasic high-entropy alloy material. The hexabasic high-entropy alloy material is prepared from, by atomic percent, 18.18%-22.22% of Co, 18.18%-22.22% of Cr, 9.1%-11.12% of Cu, 18.18%-22.22% of Fe, 18.18%-22.22% of Ni and 2.17%-18.18% of Ti, wherein the element Ti has the large atomic radius, and the severe lattice distortion effect of the element Ti can effectively enhance a solid solution phase. In addition, the element Ti has the small valence electron concentration and tends to form a compound phase, and therefore the precipitation enhancing function is achieved. An obtained hexabasic CoCrCu0.5FeNiTi0.5 high-entropy alloy has high strength and plasticity, wherein the yield strength is 850 MPa, the compressive strength reaches 1,650 MPa, and meanwhile the plasticity reaches 31.5%. The alloy has good strength and plasticity cooperation, and a preparation method is simple and reliable. The invention further discloses the preparation method of the hexabasic high-entropy alloy material.

The invention provides a content routing method and a device. The method comprises the steps of: identifying the type of a content resource according to a command required by the a content; and then, selecting a target server which provides the content resource from each high speed cache server according to the weighted value of each type of service performance parameters corresponding to the type of the content source and the difference of each high speed cache server corresponding to the same type of service performance parameters. The technical problem that in the prior art, the server performance required by a terminal is not matched with that of the target server and the efficiency of obtaining the content resource by the terminal is low are solved.

The invention relates to a high-weldability fine-grain low-alloy structural steel plate and a production method thereof. The high-weldability fine-grain low-alloy structural steel plate provided by the invention comprises the following chemical components in percentage by weight: 0.12-0.15% of C, 0.10-0.50% of Si, 1.00-1.60% of Mn, at most 0.020% of P, at most 0.010% of S, 0.60-1.0% of Ni, 0.20-0.40% of Cr, 0.20-0.40% of Mo, 0.005-0.020% of Nb, 0.015-0.05% of Al, and the balance of Fe and inevitable impurities. The production method of the steel plate comprises the following steps: electrosmelting, carrying out LF (ladle furnace) / VD (vacuum degasser) refining, carrying out die casting, heating an ingot, rolling a plate, cooling with water, and carrying out heat treatment to obtain the qualified steel plate. The room-temperature mechanical properties of the steel plate provided by the invention are equivalent to those of the foreign product; the grain fineness is Grade 7-8, the structure is full-bainite, the inclusions are lower than Grade 1, the inclusion content is low, the steel quality is pure, and the steel has excellent comprehensive mechanical properties; the mechanical properties of the steel plate completely satisfy the standard requirements of 145mm thick steel plate, and the steel plate has favorable compatibility.

The present invention provides a method for manufacturing a fully wafer-level packaged MEMS microphone and the manufactured microphone. The method includes: respectively manufacturing a first packaged chip, a MEMS microphone chip and a second packaged chip; Wafer-to-wafer bonding to form a plurality of fully wafer-level packaged MEMS microphone units; dicing the fully wafer-level packaged MEMS microphone units to form a plurality of fully wafer-level packaged MEMS microphones fully in Packaging is performed at the wafer level and does not require any further processing after wafer dicing. The method can improve cost-effectiveness, performance consistency, manufacturability, quality, scalability of the packaged MEMS microphone.

The invention provides a car roof power receiving system car body connecting damping device and a method thereof. Piezoelectric damping materials are added in a vertical connecting device between a pantograph and a car roof, and therefore mechanical vibration and noise generated on one side of the pantograph are attenuated and separated through the piezoelectric damping materials in an energy loss mode, and influences on the environment in a passenger room from the pantograph are restrained, and stability of a car body in a high-speed running process is guaranteed. The car body connecting damping device is vertically connected between the pantograph and a car roof mounting seat and comprises an inner seat, a piezoelectric damping layer and an outer seat. The inner seat and the outer seat are made of metal materials. The piezoelectric damping layer is filled between the inner seat and the outer seat after pouring forming and is formed by a polymer matrix, piezoelectric ceramics and a conductive phase in a composite mode. Elastic connection is built between the power receiving system and the car body through the piezoelectric damping layer made of nonmetal materials and in a composite layer structure, vibration generated by air resistance from various directions can be weakened and absorbed, and generation of rigid resistance on the power receiving system is avoided.