74results about How to "Meet the mechanical requirements" patented technology

The present invention discloses process of preparing integral bionic tissue engineering bone-cartilage rack with functional interface. The process includes the first establishment of CAD model of the integral bone-cartilage rack by means of bionic principle; preparing collagen / chitosan and collagen / hydroxyapatite micro polymer powder; converting the CAD model into fast forming file input into a 3D printing fast forming machine, spreading the powder with one powder spreader, spraying pentanedial adhesive selectively on the spread powder for adhering and eliminating excessive powder to obtain the integral bionic tissue engineering bone-cartilage rack with functional interface. The present invention has excellent biocompatibility, controllable cartilage rack degrading speed and mechanical strength and other advantages.

The invention discloses a method for preparing a tissue-engineered bone / cartilage integrated scaffold. An integrated scaffold structure of which internal pores are aligned and pore diameters are changed in a gradient way along a thickness direction and which has good mechanical properties is obtained by simulating the composition and spatial structure characteristics of natural articular cartilage and using extracellular matrixes and bone matrix gelatin of the cartilage as main raw materials by methods such as a different concentration superposition method, a directional crystallization method, a freeze-drying method, a cross-linking reaction method and the like. The high biocompatibility of the scaffold is favorable for the adhesion and proliferation of cells; a special pore structure of the scaffold ensures that the content of matrixes secreted by the cells is also changed in a gradient way; and meanwhile, a bone matrix gelatin substrate provides good mechanical support for the instant fixation of the scaffold and an injured part.

The invention provides a three-dimensional porous nano-bracket based on fibrinogen and a preparation method thereof. The three-dimensional porous nano-bracket based on the fibrinogen is characterized by being prepared by the fibrinogen and polylactic acid / polycaprolactone copolymer. The preparation method of the three-dimensional porous nano-bracket comprises the steps of: preparing fibrinogen stock solution and polylactic acid / polycaprolactone stock solution; electrostatic spinning; and post-treatment. The invention has the characteristics of good specific surface area, high porosity, good gap connectivity and the like.

The invention relates to a method for preparing a sodium hyaluronate and KGM (Konjac glucomannan) porous bracket material used in cartilage defect repair, belonging to the field of biomedicine materials. The invention adopts two materials, namely sodium hyaluronate and KGM. Through utilizing different proportions and the crosslinking of KGM, the sodium hyaluronate and KGM porous bracket material is prepared through adopting a freeze-drying method. The invention has mild reaction conditions, simple steps, and low cost; human body bone mesenchymal stem cells are uniformly distributed in the bracket material and can grow and reproduce well; and the aperture, the pore rate, the compressive strength, the hygroscopic coefficient, the degradation rate, and the like of the bracket material can be regulated through regulating the contents of the sodium hyaluronate, the KGM, and a cross-linking agent, as well as the freeze drying conditions, so as to get the porous bracket material meeting requirements. The material can be used in the cartilage repair field.

The present invention discloses biological surgical patch and its preparation process. The biological surgical patch includes one base material of animal membrane material, which is cross-linking fixed with non-aldehyde fixing agent and treated to eliminate antigen. The biological surgical patch made of natural biological material with collagen as main component may be degraded in the degradation speed synchronizing with the growth of the regenerating tissue, and the degraded products are amino acids or polypeptide capable of being absorbed by organism for the regenerative repair of the defected tissue. The present invention has no immunological rejection reaction, high biocompatibility, capacity of inducing tissue regeneration and good mechanical compliance, and can meet the requirement for repairing tissue.

The invention relates to an automatic timing quantifying all-around fish pond batch feeder. The automatic timing quantifying all-around fish pond batch feeder comprises a storage system, a fish meal conveying pipeline mechanism, a control system for controlling the feeding quantity and a feeding system; the electric control such as a PLC is adopted on various positions inside a machine, the automatic timing and quantitative scientific feeding can be realized, on the storage and processing aspect of the fish feed, a storage box integrating a drying device and a feed stirring function is adopted, on one hand, the fish meal can be dried so as to remove the moisture; on the other hand, the fish meal can be mixed with medicines corresponding to different fishes to be fed, the diseases of the fish can be reduced, and the real quality of the fish meal can be guaranteed. On the fish meal conveying aspect, the conveying pipeline mechanism and a mechanical connecting rod control baffle plate are adopted, so that the remote controllability of the conveying of the feed meal can be realized, and the fish meal of the same quantity can be stored in each feeding box. On the aspect for feeding the fish meal, an intermittent bulge-type injection mechanism is adopted, so that the functions such as large feeding area, large feeding range, uniformity in diffusion and the like can be realized.

The invention discloses an automatic leveling system of a load platform of a platform-type crawler climbing vehicle, comprising a load platform and a chassis, wherein one side of the load platform isrotatably connected with one side of the chassis; The automatic leveling system also comprises a driving device and a control device. A drive device is arranged between the load platform and the chassis to drive the load platform to rotate so as to form an included angle between the load platform and the chassis; The control device includes an inclination detection module for detecting an inclination angle between the load platform and the horizontal plane. The control device controls the driving device to drive the platform to rotate according to the inclination angle so as to make the inclination angle approach to zero degree so as to change the included angle, thereby controlling the platform to keep the horizontal state. The control device controls the driving device to rotate according to the inclination angle so as to make the inclination angle approach to zero degree so as to change the included angle. In the process of climbing or downhill, the platform can make real-time adjustments, to a certain extent, the platform has always maintained a horizontal state, the whole process uses closed-loop control, real-time monitoring and adjustment of the position of the platform.

The invention discloses a polyvinyl alcohol foam oxygen insulation material, which comprises a component (A) and a component (B), wherein the component (A) comprises a solvent, and 3-8 percent by weight of polyvinyl alcohol, 0.5-1.5 percent by weight of linear hydrocarbon organic alcohol or ester and 0.04-0.10 percent by weight of foaming agent based on the total amount of the solvents contained in the component (A) and the component (B); the component (B) comprises 0.1-0.3 percent by weight of borate based on the total amount of solvents contained in the component (A) and the component (B); and the mass ratio of the solvent contained in the component (A) to the solvent contained in the component (B) is (5-9):1. A method for preparing the polyvinyl alcohol foam oxygen insulation material comprises the following steps of: dissolving polyvinyl alcohol into the solvent at constant temperature 70-95 DEG C, performing return flow agitation for 30-60 minutes, cooling to room temperature, and adding the linear hydrocarbon organic alcohol or ester and the foaming agent to obtain the component (A); adding borate into the solvent to obtain the component (B); and foaming the component (A), spraying onto a coal surface and spraying the component (B) to form a foam gel oxygen insulation material layer which plays a good role in sealing and insulating oxygen on the coal surface.

The invention discloses a method for designing a main roadway coal pillar recycling scheme. The method comprises the following steps that primary schemes for main roadway coal pillar recycling are designed; a three-dimensional calculation model is established, mechanical analysis is carried out on the primary schemes, and primarily-screened schemes meeting mechanical requirements are screened out; safety analysis is carried out on the primarily-screened schemes, and fine-screened schemes with high safety are screened out; recovery rate and economic benefit analysis is carried out on the fine-screened schemes, and a final scheme with high recovery rate and economic benefits is screened out. Due to the fact that the three-dimensional calculation model is established for mechanical analysis and verification on the designed primary schemes, then, safety analysis and recovery rate and economic benefit analysis are carried out, and finally, the best comprehensive scheme meeting the mechanical requirements and safety requirements and having high recovery rate and good economic benefits is obtained.

The invention discloses a method for manufacturing impeller locking ring forgings for large wind turbines. The dimensions of the forgings are phi2220 mm*phi1840 mm*380 mm. The process method for the impeller locking ring forgings comprises the following steps: (1) discharging; (2) heating; (3) blank production with a press; (4) ring milling; (5) quenching and tempering heat treatment; and (6) finish machining. According to the process method, the production cycle can be shortened, the product quality can be improved, and the performance of the manufactured forgings meets the mechanical requirements for the impeller locking ring forgings for the large wind turbines.

The invention discloses an active polysaccharide composite bone repair material which is good in biocompatibility, good in plasticity, certain in mechanical strength and moderate in degradation velocity in bodies and can meet clinical requirements. The active polysaccharide composite bone repair material comprises a bottle A and a bottle B, wherein the bottle A comprises powder of tetracalcium phosphate, calcium hydrophosphate, chitosan, monosodium phosphate and hydroxypropyl methylcellulose; the bottle B comprises mannitol, an MES solution and a rhBMP-2 biological active factor freeze-dried aquatic product. The active polysaccharide composite bone repair material can induce formation of new bone in a human body, can form active tissue, has the advantages of good compatibility, plasticity and the like, is free of toxic reaction and can be tightly connected with sclerotin after being cured.

The invention provides a weathering resistant steel and steel plate and angle steel manufacture methods by adopting the weathering resistant steel. The weathering resistant steel comprises, by mass, 0.05-0.20% of C, 0.20-0.40% of Si, 0.80-1.60% of Mn, 0.05-0.80% of Cu, 0.05-0.85% of Cr, 0.01-0.1% of Nb, 0.15-0.70% of Ni, smaller than or equal to 0.12% of Ti, smaller than or equal to 0.30% of Mo, smaller than or equal to 0.12% of V, smaller than or equal to 0.15% of Zr, smaller than or equal to 0.03% of P, smaller than or equal to 0.006% of S, 0.01-0.05% of Al, 0.002-0.005% of N, smaller than or equal to 0.002% of O and the balance Fe and unavoidable impurities. The weathering resistant steel has excellent corrosion resistance performance and excellent mechanical properties such as stretching, impact and bending and can meet the mechanical demand of application in a power transmission and transformation iron tower after being thinned, the cost of raw materials is lowered, the power transmission iron tower adopting the weathering resistant steel does not need the processing cost of hot galvanizing, and the anticorrosion maintenance cost in the later period can also be reduced, whichhelps to reduce the construction cost. In addition, the hot-dip galvanizing process is omitted, and the pollution to the atmosphere and soil environments is reduced. The weathering resistant steel hasobvious economic benefits and an environment protection effect, the mechanical properties and the corrosion resistance performance of the weathering resistant steel are improved, and the service lifeof the weathering resistant steel is greatly prolonged.

The invention discloses a 3D printing Ti-hydrogel-osteoblast bone tissue engineering support and a preparation method thereof. The method comprises the following steps of enabling Ti6Al4V powder to beprocessed into a 3D printing Ti support with a porous structure by utilizing SLM technology; then filling a hydrogel-osteoblast mixture in the pores of the 3D printing Ti support under a certain condition so as to prepare a 3D printing Ti-hydrogel-osteoblast bone defect repair support. The support has the advantages that the structure is simple and reliable, the shape and microstructure are controllable, the mechanical property is reliable, the implantation is convenient, the trauma is small, and the cost is low.

The invention relates to a hydroxyapatite (HA) fiber-enhanced polyether-ether-ketone (PEEK) backbone fusion device, which is characterized by being manufactured by adding HA fibers into a PEEK material; the HA fibers are hydroxyapatite fibers of which the diameters are in the nanometer level and the lengths are in the micrometer level; PEEK is a medical implanted PEEK raw material; and the HA fiber-enhanced PEEK contains 5 to 30 mass parts of HA fibers, and the HA fibers can enhance the strength of the PEEK, overcome the defect of the PEEK serving as the backbone fusion device and meet the mechanical requirement of the backbone fusion device. Simultaneously, the HA fiber-enhanced PEEK backbone fusion device improves the biocompatibility of the PEEK and bones, improves the bioactivity of the PEEK and is favorable for the fusion of the bones.

The invention discloses a high-water filling material for underground coal mine, and a preparation method and device of the filling material. The filling material of the present invention is preparedfrom high-calcium fly ash, coal gasification slag, cement, water and an admixture. The preparation method of the invention comprises the steps of first adding high-calcium fly ash to water, adding theadmixture, and conducting uniform stirring and then conducting standing for 8 to 48 hours; then, adding coal gasification slag and cement, and conducting even mixing. The device of the present invention comprises: a high-calcium fly ash pretreatment tank, a cement material tank, a coal gasification slag conveyor, a stirrer and a conveying pipe. According to the invention, the high-calcium fly ashwhich cannot be used in conventional civil engineering materials is used, and the problem of poor stability of the high-calcium fly ash is solved. After full hydration digestion of the high-calcium fly ash, the high-calcium fly ash contains a large amount of combined water, high-water-content coal gasification slag and ordinary Portland cement form the high-water filling material, thus waste is turned into treasure, the cost is low, and the high-cost problem of the filling material caused by using sulphoaluminate cement is avoided.

The invention discloses a biological type cartilage repair material and its preparation method. The method for preparing the biological type cartilage repair material comprises the following steps: (1) a surfactant solution is used to immerse and process isolated animal cartilage; (2) aqueous alkali is used to immerse and process a product obtained from the step (1); (3) a surfactant solution is used to immerse and process a product obtained from the step (2); (4) aqueous alkali is used to immerse and process a product obtained from the step (3); (5) an irradiation protective reagent solution with pH of 5.0-9.0 is used to immerse and process a product obtained from the step (4); and (6) a product obtained from the step (5) undergoes freeze drying and irradiation sterilization successively so as to obtain the cartilage repair material. The biological type cartilage repair material provided by the invention has advantages of no immunological reaction and good biocompatibility and can meet mechanical requirements of repaired tissues.

Belonging to the technical field of high polymer materials, the invention in particular relates to a modified phenylene sulfide engineering plastic with high tensile strength and a preparation method thereof. The modified phenylene sulfide engineering plastic is composed of the following raw materials by weight: 30-55% of phenylene sulfide, 10-30% of polyphenyl ether, 25-40% of carbon fiber, 7-9% of a compatilizer, 0.5-0.7% of an antioxidant, 0.3-0.5% of a coupling agent, and 0.5-0.6% of a lubricant. The preparation method includes: adding the raw materials except carbon fiber into a high speed mixing machine to conduct mixing according to percentage, then adding carbon fiber to performing mixing, and carrying out extrusion granulation and drying so as to obtain the product. The modified phenylene sulfide engineering plastic has the advantages of environmental protection, energy saving, excellent comprehensive mechanical properties, high impact strength and tensile strength, still has tensile strength of more than 170Mpa when the thickness is 0.5mm, and can replace magnesium alloy and other metal materials to be used in various electrical and electronic fields.

The invention relates to an insulation waterproof coating and a construction process thereof. The insulation waterproof coating comprises a hard bubble layer formed by foaming isocyanate, polyalcohol, foaming agent, catalyst and flame retardant, and a sealing layer formed by spraying an inorganic fiber-blended water-based binder outside the hard bubble layer by an inorganic fiber sprayer outside a waterproof layer. The insulation waterproof coating has both the advantages of spraying the polyurethane hard bubble material and the inorganic fiber; thus, a continuous seamless seal integer is formed between the inorganic fiber spraying material and the polyurethane hard bubble material, which can effectively block the heat conduction, improve the energy saving effect and meet the mechanical demand of building surface. The insulation waterproof coating can also well reduce the noise generated during the running of vehicles, meet the fire resistance requirement because of the nonflammable material inside and be processed into different colors on the surface to be more beautiful and decorative.

The invention provides an assembly type shaft durkduct joint support. The joint support comprises flat steel hold hoops, secondary crosspieces, main crosspieces, support stand columns and a hoop lockhead, wherein the top ends of the stand columns are fixedly arranged at the bottoms of the two ends of the main crosspieces; the bottom of the stand columns are fixedly arranged on an outer floor slab; the secondary crosspieces stretch across two or more main crosspieces, wherein the secondary crosspieces are movably arranged with the main crosspieces; the flat steel hold hoops are buckled aroundthe outer shaft durkduct, the flat steel hold hoops are locked through the hoop lock head and is arranged on the secondary crosspieces. According to the invention, the part arranged are movably connected between the secondary crosspieces and the main crosspieces so that the size can be freely adjusted when the shaft durkduct is installed, the installation requirements of the shaft durkduct with different sizes can be met; and meanwhile, the shaft durkduct is fixed through bolts, and therefore the maintenance is more convenient in the later stage.

The invention discloses a rotator of hydraulic pulp kneader, including several groups of spiral leaf with different distance on the central axial and the thrust to brei are different, so that vorticity circulation and local vorticity circulation are formed, the times of collision is increased and the waste paper is scattered to be the single fiber. The invention has simple structure, convenient procession, high work effiency and energy saving.

The embodiment of the invention discloses a production method for an integrated cylinder cover, which includes the following steps that: aluminum alloy is selected; the aluminum alloy is forged into a blank; and an admission passage and an exhaust passage are machined on the blank. As shown in the technique scheme, since the aluminum alloy with high strength and high heat resistance is forged and machined into the cylinder cover, the cylinder cover can meet the mechanical requirements of a cylinder cover for racing cars, that is, the tensile strength is larger than 350MPa, the elongation is larger than 10 percent, and the rigidity HB is larger than 110. On the other hand, because a combustion chamber corresponds to two spark plug holes, when two spark plugs of the same type are mounted, the two spark plugs can simultaneously ignite, consequently, the transfer of flame in the combustion chamber is accelerated, the transfer distance of flame is shortened, and thereby fuel oil-mixed gas can rapidly burn in a short time and in a short distance in the combustion chamber. According to the energy conversion principle, when the mixed gas is compressed to a top dead center, the temperature of a mixer in the combustion chamber is high, so that the mixed gas can be instantly ignited and burnt out, and thereby the energy utilization rate can be greatly increased.

The invention discloses a degradable composite material and a contraceptive ring with the same and a preparing method thereof. The degradable composite material is prepared from poly p-dioxanone, polycaprolactone, polylactic acid, chitosan, starch, polyethylene glycol, polylactic acid-glycolic acid, hydroxyapatite, magnesium powder and the like; the contraceptive ring prepared with the method can be degraded and absorbed in vivo, is good in tissue compatibility, and cannot be taken out through an operation again, and generation of inflammation is effectively prevented. Meanwhile, the contraceptive ring has the enough mechanical strength, and the mechanical requirements required by supporting the uterus cavity can be met. In addition, the contraceptive ring is easy to produce, prepare and mold, and the contraceptive rings with the different shapes can be made.

The invention provides a 3D-printing PCL-PMMA-vancomycin anti-infection bone scaffold, and a preparation method and an application thereof and belongs to engineering human implants. In the method, poly-epsilon-caprolactone and polymethyl methacrylate serve as base materials and vancomycin serves as an anti-infection medicine, thus achieving biofunctions of anti-infection and promotion of osseointegration and bone defect filling surrounding the implant. The method includes: firstly, extruding PCL to form fiber bundles through a melting extrusive shaping 3D printing technology, and preparing a 3D-printing PCL scaffold by means of the jointing structure of different layers and angles of the fiber bundles; then under certain conditions, adding a PMMA monomer solution to a powder, and adding the vancomycin to the PMMA to prepare a PMMA-vancomycin mixture; filling the gaps in the 3D-printing PCL scaffold with the PMMA-vancomycin mixture in a semi-fluidized period, thereby forming the 3D-printing PCL-PMMA-vancomycin anti-infection bone scaffold. The bone scaffold has simple and reliable structure, controllable appearance and microstructure, reliable mechanical properties and controllability of medicine release performance. The bone scaffold is convenient to implant and is invasive-less and low-cost.

The invention discloses a high-precision automobile steering gear bracket and a manufacturing method thereof. The steering gear bracket comprises a fixing base, a mounting base and a connecting plate, wherein a rotary table is mounted in the fixing base; locking screw rods are connected to the rotary table; a U-shaped connecting piece and screw holes are connected to the side surface of the mounting base; a mounting groove is formed in the U-shaped connecting piece; a hydraulic oil cylinder is arranged in the connecting plate; a piston rod is connected to the hydraulic oil cylinder; and a press block is connected to the piston rod. The manufacturing method of the steering gear bracket comprises the following steps of (1) designing the structure of the steering gear bracket; (2) performing sample test; (3) performing simulated die-casting on the steering gear bracket; (4) performing simulated die-casting; and (5) performing die-casting of the steering gear bracket. Compared with the prior art, mechanical analysis of models and mechanical test of real objects are respectively performed on the steering gear bracket disclosed by the invention, so that mechanical defects of a conventional steering gear bracket are thoroughly rejected, all the mechanical requirements are met, the quality of products is improved, and the steering gear bracket disclosed by the invention has tremendous potential economic value.

The invention discloses a high-temperature-resistant photocuring 3D printing resin material which is prepared from the following components in parts by mass: 15 to 25 parts of active diluent monomer, 30 to 40 parts of high-temperature-resistant monomer, 40 to 55 parts of urethane acrylate oligomer and 1 to 3 parts of photoinitiator, the high temperature resistant monomer is one or more of tris (2-hydroxyethyl) isocyanuric acid triacrylate, tricyclodecane dimethyl alcohol diacrylate and isobornyl methacrylate; and the polyurethane acrylate oligomer is one or more of two-functionality aliphatic polyurethane acrylate, two-functionality aromatic polyurethane acrylate, six-functionality polyurethane acrylate, three-functionality polycarboacrylate and three-functionality novolac epoxy resin. The high-temperature-resistant light-cured 3D printing resin material disclosed by the invention is relatively low in viscosity, high in curing speed, excellent in temperature resistance and good in mechanical strength and flexibility. The invention further discloses a preparation method, a printing method and application of the high-temperature-resistant photocuring 3D printing resin material.

The invention relates to a flexible fiber rope combined stirrup. The flexible fiber rope combined stirrup comprises main ribs, outer side rigid stirrups and inner side tightening flexible stirrups, wherein the main ribs are encircled to be circular or regular polygonal, the outer side rigid stirrups are fixed on the main ribs, and the inner side tightening flexible stirrups are connected with allor part of the main ribs and used for restraining the main ribs. Compared with the prior art, the flexible fiber rope combined stirrup is simple in structure and easy and convenient to construct, therequired stirrup mechanical property can be achieved or exceeded, the construction efficiency can be improved, and industrial manufacturing of concrete piers, columns, beams or shear walls and the like is facilitated.