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107results about How to "Meet structural strength requirements" patented technology
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Machinable brass alloy and preparation method thereof
The invention relates to a machinable brass alloy and a preparation method thereof. The machinable brass alloy is characterized by including following components, by weight, 45-54 wt% of copper, 0.5-9.0 wt% of manganese and 37-53 wt% of zinc, wherein the total weight of the three metal components is not less than 95% and the weight of unavoidable impurities is not more than 0.1 wt%. The alloy also includes a Cu-Zn solid solution having a body-centered cubic structure and a Cu-Mn solution having a surface-centered cubic structure. The preparation method includes following main process: material preparation, smelting, continuous casting, skin stripping, pulling, stress removal and annealing, straightening, sizing and packaging. The machinable brass alloy is better in machinable and mechanical performances and is greatly reduced in alloy, can be used for replacing a machinable brass alloy in the prior art, and can alleviate the problems of shortage of copper resources and excess of zinc resources.
Owner:NINGBO POWERWAY ALLOY MATERIAL
Method for topological optimization of multiphase material flexible mechanisms under stress constraints
ActiveCN107491599AGuaranteed accuracyImprove solution efficiencyGeometric CADSpecial data processing applicationsStress concentrationFlexible Mechanisms
The invention belongs to related technical field of optimum structural design, discloses a method for topological optimization of multiphase material flexible mechanisms under stress constraints, and aims at optimizing structures of the multiphase material flexible mechanisms. The method comprises the following steps of: (1) constructing a multiphase material level set topological description model to describe distribution of a multiphase material structure; (2) constructing a rigidity interpolation model and a separable stress interpolation model to respectively calculate elastic rigidity and stress of the multiphase material structure; and (3) constructing a weighing method and stress punishment-based multiphase material flexible mechanism parameterized level set topological optimization model, optimizing output displacement and flexibility of a flexible mechanism, and controlling local stress of the multiphase material structure. The method is applied to topological optimization design of multiphase material flexible mechanisms under stress constraints, the optimized multiphase material flexible mechanisms have the advantages of being high in flexibility and high in rigidity, flexible knot parts of the multiphase material flexible mechanisms do not have single point hinge phenomenon, the structural strength requirements are satisfied, and the stress concentration problems are eased.
Owner:HUAZHONG UNIV OF SCI & TECH
Preparation method for high-strength light-operated quick self-repairing hydrogel
InactiveCN107286279AEasy to processImprove production efficiencyAdditive manufacturing apparatusCross-linkSelf-healing hydrogels
The invention relates to a preparation method for a high-strength light-operated quick self-repairing hydrogel. A self-repairing hydrogel system has higher mechanical strength and a quick self-repairing function under near-infrared light irradiation. The self-repairing function is realized by the hydrogel which is formed by cross-linking N,N-dimethylacrylamide with XLS type compound laponite. After the hydrogel is broken, the broken parts are spliced and quick self-repairing can be realized under the control of near-infrared light. According to the invention, the adopted raw materials are conveniently acquired, the preparation is simple and the processing cost is low. The self-repairing synthetic method is stable, the self-repairing hydrogel can be repeatedly prepared in large volume and the mechanical strength is high. Under the control of the near-infrared light, 92% repairing rate is realized within 5 minutes. Different structure design can be realized by the hydrogel through the mold design, so as to adapt to the practical working condition. The self-repairing function approximate to the organism can be realized when the organism is damaged. The hydrogel has wide application prospect in the fields of medical surgery dressing, drug controllable release, flexible robot, and the like.
Owner:JILIN UNIV
Large floating type steel structure intelligent fishery breeding net cage suitable for deep and far sea
PendingCN112806290AImprove qualityIncrease productionFish sortingClimate change adaptationMooring systemWind wave
The invention discloses a large floating type steel structure intelligent fishery breeding net cage suitable for a deep and far sea. The large floating type steel structure intelligent fishery breeding net cage comprises a net cage body, a netting, a mooring system, a first upper building structure and a second upper building structure; the net cage body is a steel structure frame, has a cross section of a regular hexagon structure, and is internally provided with bait bins; the netting is attached to the net cage body; a periphery of the net cage body is fixed to a seabed through the mooring system; and the first upper building structure and the second upper building structure are arranged on two sides of a top part of the net cage body respectively, an automatic feeding system, a netting cleaning system and a fish collecting system are arranged in the first upper building structure, and a central control room is arranged in the second upper building structure. The net cage body of the steel structure can effectively resist severe storm waves in deep and far sea areas, labor cost is greatly reduced through an automatic intelligent fishery breeding device carried on the net cage, and profits of deep and far sea fishery breeding are increased.
Owner:GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
Car frame for economical passenger elevator
InactiveCN102951523ALow costMeet structural strength requirementsBuilding liftsUltimate tensile strengthLinkage concept
The invention relates to a car frame for an economical passenger elevator. The car frame for the economical passenger elevator comprises an upper beam component (1), a vertical beam component (2), stay bolt components (3), a safety clamp device (4) and a bolt linkage component (5). The safety clamp device (4) is fixed to the bottom end of the vertical beam component (2), one end of the stay bolt component (3) is fixed onto the vertical beam component (2) while the other end of the stay bolt component (3) is fixed onto a car supporting frame, and the stay bolt components (3) in two pairs are arranged in the middle of the vertical beam component (2) and can meet the integral structural strength requirements by means of obliquely staying. The car frame for the economical passenger elevator has the advantages that the car frame is simple and firm in structure, production cost can be reduced while stability in performance and safety in operation of the elevator are guaranteed, and product competitiveness can be improved effectively.
Owner:CANNY ELEVATOR
Wind wing mounting base
InactiveCN104908914AMeet structural strength requirementsEffective dispersionWind acting propulsive elementsWind forceWind effect
The invention relates to a wind wing mounting base. The wind wing mounting base comprises a base body connected with a ship body deck surface, wherein a wind wing system is fixedly connected with the upper surface of the base body through a fastening piece; and a channel steel component is mounted on the base body in a penetrating manner, and is respectively connected with the ship body deck surface and the base body to form a whole structure. The wind wing mounting base is simple in structure and convenient for use; on the basis of the ship body deck surface, the channel steel component, the cylindrical base body, the ship body deck surface and a ship body hold enclosure bulkhead are welded to form a whole structure, so that wind load generated by stressing a wind effect on a wind wing is effectively dispersed on the ship body deck surface; and in addition, the wind wing mounting base can satisfy the ship body structure strength requirement to prevent damaging the ship body basic structure, and has the advantages of strong adaptability, small mounting project amount, convenience for construction and lower cost.
Owner:中国船舶重工集团公司第七〇二研究所
Fuel assembly lower pipe seat for balancing flow rate of coolant at reactor core inlet
ActiveCN104538064AWeaken vibration excitation sourceReduced risk of vibration abrasionNuclear energy generationReactor fuel elementsNuclear reactorJet flow
The invention discloses a fuel assembly lower pipe seat for balancing flow rate of a coolant at a reactor core inlet, and relates to the design field of pressurized water nuclear reactors. The fuel assembly lower pipe seat for balancing flow rate of the coolant at the reactor core inlet disclosed by the invention comprises a lower grating, a supporting framework and a filtering structure, wherein the lower grating is located at the upper part of the supporting framework, the filtering structure is located at the upper part or the lower part of the lower grating, a guide pipe hole used for mounting a fuel assembly guide pipe, an instrument pipe hole used for mounting a fuel assembly instrument pipe and a water flow hole group used for flowing the coolant and re-distributing the flow rate are formed on the lower grating in a penetration manner; aiming at the phenomenon of non-uniform flow rate distribution on the contour section of the lower part area of the reactor core caused by jet flow of a large water flow hole in a lower plate of the reactor core, the structural design is optimized to obtain more uniform flow of the coolant at the lower part of the reactor core.
Owner:SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
Technology for blending modified cold mix asphalt
The invention provides a technology for blending modified cold mix asphalt, comprising the materials of modified cold mix asphalt, wrapping agent selected from solid alkyl cationic surfactant, water and aggregate, and uses equipment such as a modified cold mix asphalt liquid atomizer with higher atomization consistency and viscosity, a nebulizer of nebulization wrapping liquid, a mixed stirrer, a metrical instrument, a container and the like. The aggregate composition conforms with requirements of standard JTG F40-2004 and JTG E42-2005, and the aggregate with the grain diameter being less than 0.15mm is replaced by cement powder. The asphalt-aggregate ratio is 4-12%. The spraying amount of the wrapping agent accounts for 1-2.5% of the weight of the aggregate. The blending technology can be completed by the following three steps: taking aggregate with the grain diameter being more than 0.15mm, spraying the wrapping agent, and blending with 25-50% of cold mix asphalt; taking aggregate with the grain diameter being less than 0.15mm, and evenly blending with the first mixture; and finally blending residual cold mix asphalt or diluted cold mix asphalt with the blended mixture to form tri-layer wrapped mastic asphalt.
Owner:李国涛
Low-dose cement modified graded broken stone base pavement
The invention discloses a low-dose cement modified graded broken stone base pavement comprising an asphalt concrete pavement layer, an anti-seepage bonding layer and a soil foundation, wherein the anti-seepage bonding layer is paved above the soil foundation; the asphalt concrete pavement layer is paved above the anti-seepage bonding layer; a low-dose cement modified graded broken stone base is paved between the asphalt concrete pavement layer and the anti-seepage bonding layer. The low-dose cement modified graded broken stone base pavement has the advantages that structure is simple, construction is convenient and early destruction phenomenon can be avoided.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Connecting structure of side wall stand column and underframe boundary beam, vehicle body and rail vehicle
ActiveCN111348063AIncrease weld lengthImprove connection strengthRailway transportAxle-box lubricationWeld seamChassis
Owner:CRRC TANGSHAN CO LTD
Magnesium alloy surface treatment method and preparation method of composite body of magnesium alloy and resin
ActiveCN107881545AStrong binding strengthHigh bonding strengthAnodisationPorous membraneBonding strength
The invention discloses a preparation method of a composite body of a magnesium alloy and resin. A magnesium alloy surface treatment method comprises the following steps that a magnesium alloy base material is provided; the magnesium alloy base material is subjected to ungrease treatment; the magnesium alloy base material subjected to ungrease treatment is subjected to acid activating treatment; the magnesium alloy base material subjected to acid activating treatment is subjected to alkaline activating treatment; the magnesium alloy base material subjected to alkaline activating treatment is subjected to anodic oxidation treatment; and the magnesium alloy base material subjected to anodic oxidation treatment is placed into amine treatment liquid to be subjected to microcorrosion treatment.According to the magnesium alloy surface treatment method, a nanoscale porous membrane can be formed on the surface of the magnesium alloy, a plurality of thin and small grooves and nanoscale holes are formed in the surface of the nanoscale porous membrane, through the holes and the grooves, when the magnesium alloy base material is subjected to subsequent injection molding treatment, during injection molding, the resin enters the nanoscale holes and the grooves, and thus high bonding strength is achieved between the magnesium alloy base material and the resin part.
Owner:广东东明新材科技有限公司
Permanent magnetism canning pump
ActiveCN101876316AMeet the needs of corrosion resistanceImprove sealing functionPump installationsNon-positive displacement fluid enginesInterior spaceEngineering
The invention provides a permanent magnetism canning pump, and in particular relates to a plastic or plastic-lined pump which is suitable for application such as the conveying, pressurization, circulation and the like of highly-corrosive chemical liquid. Aiming at the improvement of a supporting structure of a rotor system, a high-rigidity cantilever type fixing shaft structure is provided to meet various requirements. The high-rigidity cantilever type fixing shaft structure is characterized by comprising a high-rigidity metal shaft, a ceramic shaft sleeve, a motor rear frame and a sealing rear cover, wherein the high-rigidity metal shaft is fixed to the motor rear frame and forms a fixing shaft with the ceramic shaft sleeve; the ceramic shaft sleeve is used for forming the fixing shaft by combining with the metal shaft to support the rotation and the axial anti-thrust function of a motor rotor; the motor rear frame is used for fixing the metal shaft to strengthen the supporting strength of the fixing shaft and providing the sealing function of a motor coil by matching with the sealing rear cover; and the sealing rear cover is provided with a middle open pore through which the metal shaft can pass, and the inner space of the sealing rear cover is used for accommodating the motor rotor and providing the sealing function of a motor stator coil.
Owner:ASSOMA
Grid wing, novel rocket interstage section structure and application
InactiveCN112964139AHigh aerodynamic loadImprove structural strengthSelf-propelled projectilesTitanium alloyMechanical engineering
The invention belongs to the technical field of rocket separation, and discloses a grid wing, a novel rocket interstage section structure and application. The novel rocket interstage section structure is provided with an upper-stage rocket, the upper-stage rocket is connected with a lower-stage rocket, and the lower-stage rocket is folded with grid wings or grid rudders. The grid wings / grid rudders are manufactured in a titanium alloy SLM printing or casting or welding mode and are all installed on the top of a first-stage rocket in the circumferential direction, and the upper-stage rocket and the lower-stage rocket are each provided with a rocket engine. According to the grid wing, the novel rocket interstage section structure and the application, the multiple grid wings are installed at the position, close to the interstage section, of the upper-stage rocket in the circumferential direction, the grid wings are in a folded state before the rockets are separated, the grid wings are connected with the upper-stage rocket in a fixed-connection destructible or non-fixed-connection separable mode, and loads are transmitted to the upper-stage rocket independently or together with other interstage bearing structures. According to the grid wing, the novel rocket interstage section structure and the application, the weight is reduced, the launching cost is reduced, and the launching efficiency is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Heat-conducting structural adhesive for new energy power battery and manufacturing method thereof
PendingCN113528056AFlexible access to bond strengthFlexible access to tensile strengthNon-macromolecular adhesive additivesRubber derivative adhesivesEpoxyPolymer science
The invention discloses a heat-conducting structural adhesive for a new energy power battery and a manufacturing method thereof. The heat-conducting structural adhesive comprises the following components in percentage by weight: 3-14% of a component A containing at least one of block polymerization telechelic carboxyl and block polymerization telechelic amine compounds, 3-14% of a component B containing at least one of block polymerization telechelic isocyanate and block polymerization telechelic epoxy compounds, 0.1-1% of a coupling agent and a modifier, 0-1.6% of a curing accelerator, 84-92% of heat-conducting powder and 0.3-3% of a flame-retardant component; and telechelic carboxyl group, telechelic amine group, telechelic isocyanate group and telechelic epoxy group compound block polymerization methods are adopted. The component A and the component B are mixed and cured according to the proportion of 0.25-2 parts, the actually measured heat conductivity coefficient is 6-11 W / (m.K), the tensile strength is 44-16 MPa, the elongation at break is 11-78%, the shear bonding strength is 0.7-15 MPa and can be continuously regulated and controlled, and the flame retardance is V0 which is extinguished when being away from fire; and the requirement of the CTP battery pack on the strength of the heat-conducting structure can be met.
Owner:SHENZHEN GOLDLINK TONGDA ELECTRONICS CO LTD +1
Automobile longitudinal beam structure
ActiveCN103552604AMeet structural strength requirementsMeet stamping feasibilityUnderstructuresCrash testMechanical engineering
The invention relates to an automobile longitudinal beam structure which comprises a floor front longitudinal beam assembly, a floor middle longitudinal beam, a floor rear longitudinal beam, a rear bearing assembly and a safety belt lock catch mounting plate. The floor front longitudinal beam assembly, the floor middle longitudinal beam, the floor rear longitudinal beam and the rear baring assembly are sequentially connected. The requirement on the structural strength of the automobile longitudinal beam structure can be met, stamping feasibility of stamping parts is met, and weight of an automobile can be reduced; the floor longitudinal beam assembly can meet the requirement of crash test of a driving cab and the requirement of strength of fixed points of a safety belt.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Porous volcanic aggregate concrete T beam
InactiveCN106007572AQuality improvementGood lookingSolid waste managementBridgesPulverized fuel ashFly ash
The invention relates to a porous volcanic aggregate concrete T beam, and belongs to the field of concrete building materials. The porous volcanic aggregate concrete T beam comprises a concrete body and steel strands coated in the concrete body, wherein the concrete body is formed by solidifying porous volcanic aggregate concrete, and the weight proportions of raw materials in the porous volcanic aggregate concrete per cubic meter are as follows: 400 to 410 kg of cement, 80 to 90 kg of pulverized fuel ash, 690 to 700 kg of fine aggregate, 80 to 1170 kg of porous aggregate, 5.0 to 6.0 kg of water reducing agent and 140 to 150 kg of water. According to the porous volcanic aggregate concrete T beam disclosed by the invention, by blending the adding amounts of admixture, an additive, graded broken stone, the cement and river sand, the porous volcanic aggregate concrete T beam which is high in strength and is suitable for the tropical zone is developed.
Owner:CHINA ROAD & BRIDGE +1
Double-side double-groove parallel type oil-free vortex air compressor
ActiveCN110159528ALarge displacementSimple principle and designRotary/oscillating piston combinations for elastic fluidsRotary piston pumpsEngineeringAir compressor
The invention provides a double-side double-groove parallel type oil-free vortex air compressor. The double-side double-groove parallel type oil-free vortex air compressor mainly comprises two vortexfixed discs, and one double-side vortex tooth movable disc, vortex teeth are arranged on the end face of one side of each vortex fixed disc, vortex teeth are arranged on the two side end faces of thedouble-side vortex tooth movable disc, and two air compressing channels located on the two sides are jointly defined by the two vortex fixed discs and the double-side vortex tooth movable disc, the vortex teeth on the same end face are arranged to be of a double-groove parallel structure, the air compressing channel on the same side are further separated into two, and the exhaust amount of the vortex air compressor can be improved. Gas is led in from gas inlets in the periphery of the vortex fixed discs, is compressed through multiple compression channels and is discharged out of the center ofthe vortex air compressor. Compared with the prior art, the compressor has the advantages of being large in exhaust amount and more stable in work.
Owner:ZHEJIANG UNIV
Wing root butt joint manufacturing method and wing root butt joint manufacturing device, butt joint and equipment
PendingCN111215702AGuaranteed structural strength requirementsEnsure that structural strength requirements are metGeometric CADAircraft assemblyPoint cloudButt joint
The invention discloses a wing root butt joint manufacturing method and a wing root butt joint manufacturing device, a butt joint and equipment. The wing root butt joint manufacturing method comprisesthe following steps of pre-mounting a butt joint rough blank and acquiring large density point cloud data of a molded surface by laser scanning; generating a fit surface of an actually assembled buttjoint according to the point cloud data and calculating the parameter dimension of the fit surface; and carrying out finish machining on the butt joint rough blank to obtain the butt joint accordingto the parameter dimension. Based on a reverse measuring design manufacturing method, the method adopts reverse measurement in actual assembly, and designs modification and manufactures and carries out clean-up machining on beam and the butt joint according to an actual fit surface, so that the potential cushioning risk is reduced greatly, the assembling difficulty and workload are reduced and theload transfer efficiency of the actual structure is improved while it is ensured that the structural strength is met.
Owner:BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
Double-ring web type cutter head of earth pressure balance shield mechanism
The invention belongs to the technical field of tunneling machines and relates to a double-ring web type cutter head of an earth pressure balance shield mechanism. The double-ring web type cutter head comprises an inner cutter head and an outer cutter head, wherein a central circular opening is formed at the center of the inner cutter head and is used for arranging a central conical excavating cutter and a central cutter; the inner cutter head is composed of three symmetrical structures comprising three main spokes and three wide beams, which are symmetrically distributed; one wide beam is arranged between each two main spokes; an opening is arranged in the middle of each wide beam; inner sides between the main spokes and the wide beams are connected through a connecting box body respectively and outer sides are connected through a connecting rib respectively; and the openings in the middles of the wide beams are connected through an inner connecting rib (7). The double-ring web type cutter head can prevent forming of a mud cake and meets the requirements of structural strength; moreover, earth loss is prevented; and the double-ring web type cutter head has large openings of the spokes and also has the strong supporting of a panel.
Owner:TIANJIN UNIV
Single freedom degree intelligent arm rehabilitating device coordinated with somatosensory games
InactiveCN104337664ACompact structureMeet structural strength requirementsChiropractic devicesSomatosensory systemWhole body
The invention provides a single freedom degree intelligent arm rehabilitating device coordinated with somatosensory games. The single freedom degree intelligent arm rehabilitating device coordinated with the somatosensory games comprises a control unit, a power and transmission device, a supporting frame and a manual adjusting assembly, wherein the supporting frame comprises an upper arm supporting frame and a lower arm supporting frame; the power and transmission device is used for connecting the upper arm supporting frame and the lower arm supporting frame; the manual adjusting assembly is arranged on the power and transmission device; the control unit is provided with a control panel and a somatosensory sensor; a rehabilitating arm captures a systemic action of a patient through the somatosensory sensor, and controls the power and transmission device to drive the upper arm supporting frame and the lower arm supporting frame to move through the control panel; a freedom degree of an elbow is achieved between the upper arm supporting frame and the lower arm supporting frame through the power and transmission device. The single freedom degree intelligent arm rehabilitating device coordinated with somatosensory games is used for helping the patient suffering from arm fracture to do reasonable, effective and funny rehabilitation training, and has the characteristics of shortening the rehabilitating time and improving the rehabilitating efficiency.
Owner:SHANGHAI JIAO TONG UNIV
Seamless splice structure for aluminum frame corner
InactiveCN103139515ASave construction spaceGood for thinning and narrowingTelevision system detailsColor television detailsStructural engineeringAluminum extrusion
The invention discloses a seamless splice structure for an aluminum frame corner. The seamless splice structure for the aluminum frame corner comprises two adjacent aluminum extrusion frame strips of the aluminum frame corner, wherein the adjacent aluminum extrusion frame strips are formed through seamless splicing. The seamless splice structure for the aluminum frame corner is characterized by further comprising a corner collecting piece which is used for connecting the two aluminum extrusion frame strips. The corner connecting piece is an L-shaped angle-folded component. Two connecting edges of the L-shaped angle-folded component are respectively fixed with the two aluminum extrusion frame strips. According to the seamless splice structure, under the situation that welding is not needed, splicing of the position of the aluminum frame corner achieves a seamless effect, a structural space of an aluminum frame is saved to the maximum extent, and electronic display products with the aluminum frame applied can be made to be thin and narrow.
Owner:SUZHOU VICTORY PRECISION MFG
Encapsulation casing, base and displaying device
ActiveCN103002685AMeet structural strength requirementsStands/trestlesIdentification meansSurface plateDisplay device
Owner:BOE TECH GRP CO LTD
Monoblock cast framework for metro bogie with axle box arranged inside
ActiveCN107719403AReduce the amount of displacementSmall footprintBogiesAxle-boxes mountingBogieUltimate tensile strength
The invention discloses a monoblock cast framework for a metro bogie with an axle box arranged inside and belongs to the field of framework devices for rail vehicle bogies. The monoblock cast framework comprises a crossbeam unit and two side beam units, the side beam units are parallelly and symmetrically arranged on two sides of the crossbeam unit, and the crossbeam unit and the side beam units are integrally formed through a casting process. The number of weld joints is reduced substantially, and overall structural strength and fatigue strength of the framework are improved. Minimum curve passing radius of the train bogie using the framework is reduced to at least 36m, and turning maneuverability and flexibility of the new bogie are improved substantially; a side beam gearbox hanging seat is arranged on each side beam unit, a gearbox hanging rod can be ensured to be close to a gearbox shaft to greatest extent, and coupling displacement quantity is reduced, so that occupied space of adriving device is reduced. In addition, by the structure, long-cantilever structure of the gearbox hanging seat can be avoided to overcome the defect that existing long-cantilever structure is low infatigue strength and short in service life.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
Wide-body double hull board side double bottom ship based on large openings of inner rib plates in ballast tank
ActiveCN104554627AIncrease profitHigh strengthHull interior subdivisionMarine engineeringDouble bottom
The invention discloses a wide-body double hull board side double bottom ship based on large openings of inner rib plates in a ballast tank. A board side and a bottom comprise a double-shell shell; rib plates of vertical structures are spaced from one another between an inner shell and an outer shell of the board side. When the distance A of the inner shell (1) and the outer shell (2) is greater than 8 percent of width B, the area of openings which are vertically spaced from one another in the rib plates is 25 percent greater than the sectional area of a three-dimensional structure defined by the inner shell (1), the outer shell (2) and upper and lower adjacent horizontal girders and perpendicular to the length direction. The ship has the advantages that the welding workload and the lightship weight are effectively reduced, the steel utilization rate is improved, the load of liquid cargoes and waves is effectively transferred through arrangement of transverse and vertical stiffeners and the radius size of vertical and transverse connecting arc, the welding area is effectively increased and the stress is reduced by adopting 25-degree snip on end parts of the transverse and vertical stiffeners, and the requirement on structural strength at regions with the large openings can be met through rational arrangement.
Owner:DALIAN SHIPBUILDING IND
Manufacturing method of launching barge rocker arm hinged support
ActiveCN104859791AMeet the precision requirementsMeet structural strength requirementsWelding/cutting auxillary devicesVessel partsSpecial bedStructural deformation
The invention relates to a manufacturing method of a launching barge rocker arm hinged support. A bed-jig for manufacturing the rocker arm hinged support is firstly manufactured, assembly and welding processes of a rocker arm hinged structure are performed on the bed-jig, the welding process is carried out after assembly is fully completed, by using the bed-jig, horizontal overhead position welding in the traditional welding process is changed into horizontal fillet welding, thus the operation difficulty is lowered, the accuracy and efficiency of welding are improved, synchronous symmetrical welding from the middle to both ends is performed, a single welding method in the prior art is changed, and thus structure deformation due to too high local temperatures in the welding process can be effectively avoided. According to the invention, the special bed-jig is designed, structure assembly and welding processes of the rocker arm hinged support are optimized, the manufactured rocker arm hinged support can meet the requirements for precision and structural strength, correction work in view of the structural deformation can also be effectively avoided, thus the production difficulty is reduced, the efficiency is greatly improved favorably, and the cost is reduced.
Owner:CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
Joint structure of multi-coupled steel component
PendingCN107806178AImprove local stiffnessMeet structural strength requirementsBuilding constructionsStructural engineeringSteel casting
The invention discloses a joint structure of a multi-coupled steel component. The joint structure of the multi-coupled steel component comprises a main component and a plurality of connecting components, the main component is of a hollow tubular structure, the main component is provided with a connection joint area, a plurality of first inner strengthening ring plates are arranged in the position,corresponding to the connection joint area, in the main component, and all the first inner strengthening ring plates are arranged in the height direction of the main component at intervals in an arrayed mode; and the multiple connecting components are fixedly connected with the main component, and the ends, fixedly connected with the main component, of the multiple connecting components are located in the connecting joint area. The joint structure of the multi-coupled steel component can effectively optimize local force of the main component, an existing method by adopting cast steel joints or increasing the wall thickness of the main component is replaced, the wall thickness of the main component is effectively controlled, the machining period is shortened, and the weight of the multi-coupled steel component is reduced. Therefore, the whole structure cost of the joint structure of the multiple-limb steel component is lower than that of the method by adopting cast steel joint design and increasing the wall thickness of the main component.
Owner:深圳华森建筑与工程设计顾问有限公司
Graphene wave-absorbing composite material skin forming method
ActiveCN112265292ARealize the integration of structure and absorbing functionAdvanced technologyFiberCarbon fibers
The invention discloses a graphene wave-absorbing composite material skin forming method. The method comprises the following steps: 1) preparing a graphene laminated material with paving property; 2)preparing a skin prefabricated body by utilizing a plurality of layers of alternately paved graphene laminated materials and carbon fiber prefabricated bodies; 3) taking high-conductivity carbon nanographene fiber as a sewing line, and performing two-dimensional sewing on the skin prefabricated body to obtain a fiber prefabricated body; and 4), processing the fiber prefabricated body by using anRFI liquid molding process to obtain a graphene absorbing composite material skin. According to the graphene wave-absorbing composite material skin forming method provided by the invention, large-sizegraphene materials and the like are used as raw materials, an existing composite material prefabricated body forming technology and a resin film infusion (RFI) liquid forming method are creatively combined, and the method has the advantages of leading edge, operability and practicability and is suitable for wide application and popularization.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP
Machinable brass alloy and preparation method thereof
A cuttable machinable brass alloy and manufacturing method. The brass alloy comprises the following components in percentage by weight: 45-54 wt% of copper, 0.5-9.0 wt% of manganese, and 37-53 wt% of zinc, wherein the percentage sum of copper, manganese and zinc is greater than or equal to 95 wt%, and inevitable impurities are less than or equal to 0.1 wt%. The alloy comprises a Cu-Zn solid solution having a body-centered cubic structure and a face-centered cubic Cu-Mn solid solution. Primary steps of the manufacturing method include: mixing materials, smelting, continuous casting, scalping, drawing, stress relieving and annealing, straightening, sizing, packaging, etc. The cuttability performance and mechanical properties of the brass alloy is superior and can replace the existing cuttable brass alloy, thus addressing the scarcity of copper resources and excess of zinc resources.
Owner:NINGBO POWERWAY ALLOY MATERIAL
Vacuum thermal-insulation module
InactiveCN102912873AImprove sound insulation efficiencyImprove structural strengthHeat proofingSound proofingThermal insulationEngineering
The invention relates to a thermal-insulation and sound-insulation material, in particular to a vacuum module with a protective layer. The module comprises side surface walls, a front surface, a back surface and a poppet of a hollow cavity among the side surface walls, the front surface and the back surface, wherein sealing layers of the front surface and the back surface are respectively provided with a netted in-cavity framework and a netted out-cavity framework and are connected with the side surface wall into one, the poppet used for preventing the module from being deformed is arranged between the in-cavity framework of the front surface and the in-cavity framework of the back surface, and air suction systems are arranged on the side surface walls; the protective layer is arranged at the outer part of the out-cavity framework of the front surface, a framework in a hollow thermal-insulation layer between the protective layer and the front surface is provided with ventilation holes so that blank spaces of the framework are communicated with one another, and an air regulating system is also arranged; and the out-cavity framework of the back surface is provided with installation positions so that modules can be combined tightly and assembled / disassembled independently through the combination of specially-used installation parts. The module has the characteristics that the thermal-insulation and sound-insulation effects are improved, is an energy-saving and environmental-friendly material with high utilization ratio and can be produced in a large scale.
Owner:KAI COUNTY RENRENYOUYU TECH
Single-degree-of-freedom arm rehabilitation device based on brain-machine interface
InactiveCN104337665ACompact structureMeet structural strength requirementsInput/output for user-computer interactionChiropractic devicesSingle degree of freedomDegrees of freedom
The invention provides a single-degree-of-freedom arm rehabilitation device based on a brain-machine interface. The single-degree-of-freedom arm rehabilitation device comprises a control unit, a power and transmission device, a support frame and a manual regulation component, wherein the support frame comprises an upper arm support frame and a lower arm support frame; the power and transmission device is used for connecting the upper arm support frame with the lower arm support frame; the manual regulation component is arranged on the power and transmission device; the control unit is provided with a control panel and a brain wave sensor. The arm rehabilitation device is used for collecting the brain wave signals of a patient by the brain wave sensor and controlling the power and transmission device to drive the upper arm support frame and the lower arm support frame to move by the control panel; an elbow degree-of-freedom is realized through the power and transmission device between the upper arm support frame and the lower arm support frame. The device is used for assisting the patient with a broken arm to conduct reasonable, effective and interesting rehabilitation training, and has the characteristics of shortening the rehabilitation time and improving the rehabilitation efficiency.
Owner:SHANGHAI JIAO TONG UNIV
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