107results about How to "Meet structural strength requirements" patented technology

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.

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.

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.

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.

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.

The embodiment of the application relates to the technical field of railway vehicles, in particular to a connecting structure of a side wall stand column and an underframe boundary beam, a vehicle body and a railway vehicle. The connecting structure comprises a side wall stand column, a bottom frame edge beam and a connecting piece welded to the side, close to the arc-shaped face, of the bottom frame edge beam. The connecting piece is used for enhancing the connecting strength between the side wall stand column and the bottom frame edge beam. One part of the bottom end face of the side wall stand column is welded to the top face of the bottom frame edge beam, and the other part of the bottom end face of the side wall stand column is welded to the connecting piece. According to the connecting structure, the connecting piece is additionally arranged between the side wall stand column and the underframe boundary beam; the length of a weld joint between the underframe boundary beam and theside wall stand column can be increased through the connecting piece, so that connecting strength between the side wall stand column and the underframe boundary beam is improved, and a problem that the connecting strength of the existing vehicle body is reduced because the side wall stand column and the underframe boundary beam cannot be welded at the arc of the underframe boundary beam can be solved.

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.

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.

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.

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.

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.

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.

An embodiment of the invention provides an encapsulation casing, a base and a displaying device, relates to the technical field of part structures of displayers and solves the problem that the base and the encapsulation casing in the prior art are not suitable for a light and thin displaying panel. The encapsulation casing comprises a front casing and a rear casing which are used for encapsulating the displaying panel and are buckled correspondingly. The encapsulation casing further comprises a front casing extension wall and a rear casing extension wall, wherein the front casing extension wall is connected with the bottom of the front casing and extends backwards; and the back casing extension wall is connected with the bottom of the rear casing and extends backwards. The front casing extension wall is provided with a first connection portion, the rear casing extension wall is provided with a second connection portion, the back of the rear casing is provided with a third connection portion, and the first connection portion, the second connection portion and the third connection portion are used for being connected with a locking structure of the base. The encapsulation casing, the base and the displaying device are suitable for design and manufacture of the part structures of the displayers.

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.

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.

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.

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.

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.