28results about How to "Avoid brittle fracture" patented technology

This utility model discloses a filter paperboard punching mechanism, relating to the field of filter paperboard processing technology. It includes a hydraulic punching main unit, with a punching worktable on the front side of the main unit. A lower punching die is fixedly connected to the upper front end of the worktable. A hydraulic telescopic rod is fixedly connected to the upper end of the main unit via a cantilever, positioned directly above the lower punching die. Through the use of elastic heating support pads and elastic pressure pads, the loose fiber structure of the filter paperboard is effectively prevented from being compacted, ensuring the air permeability and filtration efficiency of the filter paperboard. Simultaneously, the elastic heating support pads heat the filter paperboard when in contact with it, softening the fibers and preventing brittle breakage, thus improving the quality of the punching process. Furthermore, the elastic pressure pads further reduce the direct impact of the punching blade on the paperboard, resulting in a smoother punching edge, reducing burrs and fiber damage, and improving the overall quality of the product.

The invention provides a rotor surface treatment process, and relates to the technical field of surface treatment.The rotor surface treatment process is characterized in that a coating sequentially comprises a soft layer A, a hard layer B and a toughening layer C from a base body to the outside; the soft layer A is a metal lubricating composite layer formed by metal Mo or W and C or S with increasing content; the hard layer B is formed by metal nitride or carbonitride; a continuous component and structure gradient region is arranged between the soft layer A and the hard layer B; and the toughening layer C is a nanocrystalline-amorphous mixed structure formed by solid micro-diffusion of the hard layer B at 320-420 DEG C. Periodic micro-pits are formed in the surface of the toughening layer C and can be used for storing a lubricating medium. Through component gradient design and process hardening and tempering, the binding force, the wear resistance, the impact resistance and the stripping resistance of the coating are remarkably improved, the service life of the coating is prolonged, and the service life of the coating is prolonged. The method is suitable for high-load and high-friction working conditions such as vacuum pump rotors.

The utility model relates to optical fiber detection equipment technical field, especially optical fiber protection kit of inner pressure collection platform, the utility model discloses a bottom fixed interface, clamping groove, deposit mouth, detection flow channel, joint suite, linear flow channel, open mouth and protection cover, clamping groove is opened in bottom fixed interface top, deposit mouth is opened in the inner wall of clamping groove, and detection flow channel is penetrated in the bottom of bottom fixed interface, and joint suite is located in bottom fixed interface top, and the outer edge of joint suite is matched with the inner diameter of clamping groove, and linear flow channel is penetrated in the center axis of joint suite, and open mouth is opened in the bottom of linear flow channel, and the bottom of protection cover is placed in deposit mouth, and protection cover is the conical shape of upper narrow and lower wide, and protection cover is made of elastic plastic material, and joint suite is compressed and tight protection kit through open mouth, and the inner wall of sealed flow channel is close to the outer surface of optical fiber, forms pressure buffer area, when the container generates high pressure, and protection cover can carry out pressure buffering, and it is convenient for the data acquisition of optical fiber under various pressures.

The invention relates to a high-saturation ferrocobalt alloy and a low-temperature high-toughness eddy current braking magnetic pole. The high-saturation iron-cobalt alloy comprises the following components: 16%-18% of Co; 1.4% to 2.2% of Cr; mo: 0 or < = 1.5%; v: 0 or < = 0.4%; and the balance of Fe and inevitable impurity elements. The invention also provides a low-temperature high-toughness eddy current brake magnetic pole which is prepared from the high-saturation iron-cobalt alloy through smelting, forging, heat treatment and machining. According to the high-saturation iron-cobalt alloy and the low-temperature high-toughness eddy current braking magnetic pole prepared from the high-saturation iron-cobalt alloy, the components of the iron-cobalt alloy material are regulated and controlled, so that the magnetic pole prepared from the high-saturation iron-cobalt alloy has high saturation magnetic performance and excellent low-temperature impact toughness.

The invention discloses an underground mining supporting device for preventing mine collapse, and belongs to the field of mining equipment, the underground mining supporting device comprises lifting mechanisms symmetrically arranged on the left and right sides of a roadway, top seats are arranged at the tops of the lifting mechanisms, and supporting units annularly distributed along the roadway are arranged between the top seats; each supporting unit comprises an inner-layer high-strength bearing pipe, a middle-layer gradient yield pipe and a corrugated supporting pipe which are sequentially arranged from inside to outside, and a plurality of buffering connecting pieces and variable resistance nodes are arranged between the inner-layer high-strength bearing pipe and the middle-layer gradient yield pipe at equal intervals. A side wall attaching layer is arranged on the side, close to the roadway, of the lifting mechanism and comprises a plurality of attaching pipe mounting structures distributed in the vertical direction, and attaching pipes are arranged in the attaching pipe mounting structures. Gradient yielding bearing matched with the deformation time history and shape of surrounding rock is achieved, composite deformation can be decoupled, brittle failure and bending failure of the support are avoided, and the stability and collapse prevention capacity of the deep mine roadway support are remarkably improved.

The application relates to the technical field of cables and discloses a cross-linked polyethylene high-voltage cable which comprises a conductor, an insulation layer and a protective sleeve arranged from inside to outside; the protective sleeve comprises the following components: 50-80 parts of high-density polyethylene, 0.5-1 part of a cross-linking agent, 10-20 parts of a composite flame retardant, 0.5-1 part of an antioxidant, 0.5-1 part of a lubricant, 2-3 parts of polyethylene grafted maleic anhydride and 1-2 parts of carbon black in terms of weight fractions; the application has the beneficial effects that the flame-retardant monomer has phosphorus-nitrogen synergistic flame-retardant and interface reinforcing functions; a thiadiazole ring is reacted with the surface of aluminum hydroxide to improve the dispersibility of the aluminum hydroxide, the mechanical properties of the material are enhanced, and the flame-retardant efficiency is improved; after the aluminum hydroxide is uniformly dispersed, thermal decomposition is more efficient, the gaseous flame-retardant and carbonization of the synergistic flame-retardant monomer are realized, a dense protective layer is formed, and flame-retardant and reinforcing integration is realized; the well-dispersed aluminum hydroxide can also be used as a rigid particle to reinforce the matrix and avoid stress concentration.

This utility model relates to a stainless steel and tantalum composite insulator, comprising a stainless steel shell as a conductive cathode, an mounting position for a tantalum tube anode inside the stainless steel shell, an axially mounted tantalum tube anode inside the mounting position, and a microcrystalline glass layer forming an insulating medium at the connection between the tantalum tube anode and the stainless steel shell; the tantalum content of the tantalum tube anode is 99% or more by mass, with the remainder being impurities; the conductive cathode is either 316L or 2205 duplex stainless steel. By using the tantalum tube anode and stainless steel as the conductive cathode, and the microcrystalline glass forming the insulating layer, a matching seal can be achieved with the stainless steel and tantalum tube, ensuring electrical isolation. The tantalum tube anode can withstand boiling concentrated sulfuric acid, hydrochloric acid, and other strong acids, with a lifespan far exceeding that of traditional electrodes; ensuring the corrosion resistance of the stainless steel and tantalum composite insulator. The stainless steel cathode undergoes surface modification to avoid brittle fracture caused by long-term hydrogen evolution, increasing its conductive stability.

The invention provides a quercetin-based polyurethane material, a novel metal-ligand coordination cross-linked polyurethane material and a preparation method and application of the quercetin-based polyurethane material and belongs to the technical field of polyurethane materials, and the structural formula of the novel metal-ligand coordination cross-linked polyurethane material is shown in the specification. The preparation method comprises the following steps: adding diisocyanate into a completely molten dihydric alcohol oligomer system, and reacting to obtain an isocyanate-terminated prepolymer; adding a quercetin solution into the prepolymer system, and reacting to obtain a quercetin-based polyurethane solution; and adding a metal ion solution into the quercetin-based polyurethane solution system, and volatilizing the solvent after the reaction to obtain the novel metal-ligand coordination cross-linked polyurethane material. According to the invention, oligomer dihydric alcohol is taken as a soft segment, quercetin is taken as a chain extender, and a polyurethane material containing quercetin in a main chain and a metal-ligand coordinated cross-linked polyurethane material are synthesized by a one-pot method; wherein the metal ions are used as cross-linking points to be connected with a polyurethane main chain, so that a more flexible network structure is formed.

The invention belongs to the field of liquid adhesive materials, and particularly relates to an adhesive material with reversible tensile universal adhesion as well as a preparation method and application of the adhesive material. The preparation method of the adhesive material comprises the following steps: S1, mixing deionized water and acidic polysaccharide with the weight-average molecular weight of 0.8-2 MDa, and stirring until the mixture is dissolved to obtain an acidic polysaccharide solution; s2, adding an inorganic metal salt into the acidic polysaccharide solution, and stirring until the inorganic metal salt is dissolved to obtain a precursor solution; and S3, adding concentrated hydrochloric acid into the precursor solution, stirring until the system is viscous, standing, and self-assembling, thereby obtaining the product, the addition amount of the concentrated hydrochloric acid is 0.1-0.325 wt% of the mass of the deionized water. The adhesive material prepared by the method has high energy dissipation efficiency and super-long reversible stretch rate, can effectively bear transient impact load caused by a high-speed moving target, provides stable adhesion, and is suitable for stable adhesion of various complex structure surfaces.

This utility model discloses a composite reinforced flexible polyethylene composite pipe, relating to the field of composite pipes. It includes an outer polyethylene pipe and an inner polyethylene pipe, with the inner pipe located inside the outer polyethylene pipe. Multiple skeleton structures are fixedly installed between the outer and inner polyethylene pipes, and connecting rings are provided between each skeleton structure. This utility model can form a radially uniformly distributed rigid support, effectively suppressing radial deformation of the pipe. The steel frame plates are movably connected by flexible connecting frames, allowing the steel frame plates to deform collaboratively when the pipe bends. While ensuring the strength of the rigid support, it also improves the bending deformation capacity of the composite pipe. It allows the skeleton to slip slightly axially when the pipe is under pressure, dispersing local stress and avoiding brittle fracture. While increasing the support rigidity of the steel frame plates, it also allows the composite pipe to undergo local torsion, enabling the polyethylene composite pipe to form a dynamic balance mechanism between controllable deformation and rigid support.

The invention discloses a preparation method of raw bamboo fibers for superfine spinning, and belongs to the technical field of bamboo fibers.The method comprises the following steps of bamboo chip pretreatment, steam explosion, enzyme treatment, ultrasonic dispersion-carding refining, strengthening treatment and damp and hot setting. The strengthening treatment method comprises the following steps: immersing enzyme-treated bamboo fibers into a sericin aqueous solution, carrying out vacuum impregnation for 40-50 minutes, taking out the enzyme-treated bamboo fibers, controlling water until discontinuous dripping is realized, then immersing the enzyme-treated bamboo fibers into a CaCl2 solution, oscillating for 10-15 minutes, taking out the enzyme-treated bamboo fibers, controlling water until discontinuous dripping is realized, immersing the enzyme-treated bamboo fibers into a NaHCO3 solution, oscillating for 20-30 minutes, taking out the enzyme-treated bamboo fibers, washing the enzyme-treated bamboo fibers with water for 2-3 times, dehydrating until the water content is 30-35%, and drying the enzyme-treated bamboo fibers. Reinforced bamboo fibers are obtained; according to the method, the fineness of the natural bamboo fibers is reduced, meanwhile, it is guaranteed that the strength performance is not reduced, the average length of the fibers is increased, and meanwhile the natural bamboo fibers have certain toughness and size stability and high wet strength retention rate.

This utility model belongs to the field of floor slab reinforcement technology, and in particular to a floor slab structure, including a precast floor slab. Load-bearing walls are provided on both sides of the precast floor slab. An upper reinforcement component is provided above the precast floor slab. The upper reinforcement component includes a formwork and a post-cast concrete layer. The post-cast concrete layer is poured inside the formwork, and a bidirectional steel mesh is provided inside the post-cast concrete layer. Carbon fiber cloth is provided below the precast floor slab. Several transversely evenly distributed main beams are provided below the carbon fiber cloth, and several vertically evenly distributed secondary beams are provided below the transverse main beams. The upper layer combines the post-cast concrete layer and the bidirectional steel mesh to connect the dispersed precast slabs into a whole. The middle layer reinforces the tension zone with carbon fiber cloth, improving the bending load-bearing capacity and ductility of the precast floor slab. The lower layer, with its transverse main beams and longitudinal secondary beams, forms a supporting frame, achieving the effect of improving seismic reinforcement.

The utility model discloses a continuous press steel band drive roller axle and end plate's connecting structure, including drive roller axle and end plate, its drive roller axle's both ends adopt interference fit mode and hot jacket assembly technology and install on end plate. The utility model makes end plate material produce elastic deformation, and the powerful radial pressure that forms, relies on the friction between drive roller axle and end plate hole contact surface and transmits greater torque and bears greater axial force, and stress distribution is relatively even, and forms the continuous compression stress in interference fit area, so that drive roller axle and end plate connection intensity and reliability are higher than welding structure.

The invention discloses a high-performance polyphenyl ether material and a preparation method thereof.The preparation method comprises the steps that modified polyphenyl ether reacts with a modified additive, bromine atom sites on the modified polyphenyl ether react with phenolic hydroxyl groups on the modified additive, then the product is mixed with modified carbon nanotubes, a cross-linking agent and benzophenone, a mixture is prepared, the mixture is subjected to vacuum drying, and the high-performance polyphenyl ether material is obtained. The preparation method comprises the following steps: modifying carbon nanotubes and modified polyphenyl ether, reacting under the condition of ultraviolet irradiation to prepare the high-performance polyphenyl ether material, reacting double bonds on the modified carbon nanotubes and double bonds on the modified polyphenyl ether with sulfydryl on a cross-linking agent during ultraviolet irradiation to further form dynamic cross-linking, dissipating energy through dynamic bond exchange, actively relaxing stress and passivating cracks, and preparing the high-performance polyphenyl ether material. The modified polyphenyl ether reacts with the modified additive to form a cross-linked network, and the modified additive is an organic silicon elastomer and can serve as a stress concentration point to induce a matrix to generate a large amount of crazing and shear bands, so that a large amount of energy is absorbed, and cracks are prevented from further expanding.

The invention relates to the field of concrete electric poles, in particular to a fiber-reinforced ultra-high-performance concrete electric pole and a preparation method thereof, and aims to solve the problems that a traditional concrete electric pole is poor in waterproof and waterproof performance and mechanical performance, short in service life in a severe environment and difficult to meet strict requirements of ultra-high voltage and long-distance power transmission. According to the preparation method, the modified polydopamine coated basalt fiber and the multi-epoxy fluorine-containing compound are added into the electric pole, so that the waterproof performance and the mechanical performance of the electric pole can be remarkably improved, the overall performance of the electric pole is greatly improved, and the service life of the electric pole in a severe environment can be remarkably prolonged; therefore, the long-term reliability and safety of the electric pole are ensured, the electric pole can meet the use requirements of different severe environments and engineering scenes, and high-quality development of electric power engineering construction is promoted.

This invention discloses a high-heat-resistant ultrafine nano-zirconia composite material and its preparation method, belonging to the field of nanocomposite material technology. First, a high-density hydroxyl reaction site is introduced through an in-situ hydrolysis deposition process of zirconium chloride in an alkaline environment to obtain hydroxyl-rich nano-zirconia. Then, it undergoes a condensation reaction with a silane coupling agent containing double bonds to graft highly active double-bond functional groups onto the surface of inorganic particles, thus obtaining double-bond modified nano-zirconia. Subsequently, low-density polyethylene, antioxidants, and initiators are melt-blended with the double-bond modified nano-zirconia, and in-situ graft polymerization initiated by free radicals is used to obtain a high-heat-resistant ultrafine nano-zirconia composite material. Through the rigid skeleton synergistic mechanism constructed by chemical bonding, the thermal slip and creep behavior of polymer molecular chains at high temperatures is significantly restricted, thereby improving the heat resistance of the material while maintaining good mechanical strength.

The invention discloses a preparation method and application of a cross-linked nanocellulose lithium battery binder, and belongs to the technical field of lithium ion battery binders. In the preparation process of the cross-linked nanocellulose lithium battery binder, a rigid crystalline nanobody TOCNF is introduced as a reinforcing phase, calcium citrate, citric acid or phytic acid is adopted as a green cross-linking agent, multiple hydrogen-bond interaction and a chemical cross-linked structure are synergistically formed in a system, and a stable three-dimensional network is constructed, so that expansion and cracking of a silicon-based electrode are effectively inhibited; the cycling stability and the capacity retention ratio are obviously improved; the plant-derived TOCNF is taken as a core and is matched with a green biodegradable cross-linking agent to construct a full-water-based system, toxic organic solvents are abandoned, and the method conforms to the concepts of environmental protection and circular economy. When the silicon-based lithium ion battery negative pole piece material is prepared, the TOCNF and the cross-linking agent are introduced to construct a synergistic three-dimensional network, and SBR elastic buffering is combined, so that SiOx volume expansion and pole piece cracking are effectively inhibited, and the cycling stability and the capacity retention rate of a silicon-based electrode are remarkably improved.

This invention discloses a weather-resistant enhanced 1kV overhead insulated conductor, relating to the field of power cable technology. Several outer and inner air tubes are connected between two main air boxes located on the same axis. A rubber bladder is embedded between the outer and inner air tubes, and the rubber bladder is filled with microcapsule particles. Two pressure-resistant arc plates are embedded inside the pressure-resistant cavity. A torsion tube is connected between two adjacent pressure-resistant arc plates via two elastic arc plates. Torsion springs are connected between several adjacent torsion tubes. In this invention's pressure-resistant and cold-resistant components, the cable's flexibility is ensured when laying cables in low-temperature weather. In areas with large temperature differences, the cable's temperature change is more stable, preventing prolonged overheating or underheating. In the de-icing and heat dissipation components, the cable temperature is prevented from becoming too high in high-temperature weather and from icing in snowy weather. The two components work together to enhance the cable's weather resistance and improve its performance.

The present disclosure provides a transparent elastic electronic skin of a wearable optoelectronic device and a preparation method thereof. The method comprises the following steps: obtaining an electrode patterned carrier; electrospinning an elastic polymer spinning solution on an electrode pattern layer of the electrode patterned carrier to obtain an elastic fiber membrane-electrode patterned carrier; immersing the elastic fiber membrane-electrode patterned carrier in water or an ethanol solution to obtain a conductive elastic fiber precursor membrane A; performing spin coating on the conductive elastic fiber precursor membrane A, and then drying and curing to obtain a conductive elastic fiber precursor membrane B; and performing selective wetting operation on the electrode pattern layer of the conductive elastic fiber precursor membrane B by using a liquid conductive metal to obtain the transparent elastic electronic skin of the wearable optoelectronic device. The transparent elastic electronic skin prepared by the method has high light transmittance, high mechanical elasticity, excellent air and moisture permeability, stable conductivity and suitable adhesion, so as to better meet the long-term dynamic high-precision wearing requirements.

The invention discloses a modified polypropylene base film, a functional copper current collector and a preparation method of the functional copper current collector, and relates to the technical field of functional current collector base films. The raw materials of the modified polypropylene base film comprise a crosslinking master batch and an initiator; the crosslinking master batch comprises pentaerythritol tetraacrylate and polypropylene in a mass ratio of 1: (5-15); the addition amount of the initiator is 0.2-0.4 wt% of the cross-linked master batch. The modified polypropylene-based film prepared by the invention has strong interface bonding force with a metal copper layer, and the functional copper current collector prepared based on the modified polypropylene-based film has excellent stripping force and mechanical strength.

The application discloses an anchoring system and method for a large-diameter fiber composite rod, and relates to the technical field of composite material anchoring, which comprises a large-diameter fiber rod, a stepped inner anchoring cylinder sleeved on an anchoring section of the large-diameter fiber rod, an outer locking sleeve threadedly connected to a small end of an inner diameter of the stepped inner anchoring cylinder, and a centering ring embedded between a large end of the inner diameter of the stepped inner anchoring cylinder and the large-diameter fiber rod; six evenly-distributed slits are formed in an end of the anchoring section of the large-diameter fiber rod along an axial direction, forming a six-petal bifurcated structure, a six-petal gradient hard alloy wedge block is embedded in the center of the six-petal bifurcated structure, and each side edge of the six-petal gradient hard alloy wedge block is correspondingly inserted between two adjacent petals of the large-diameter fiber rod. Through the synergistic innovation of structure, material and process, the application effectively solves the technical problems of stress concentration, low anchoring efficiency, easy damage of the rod body and poor environmental adaptability in the anchoring of the large-diameter fiber composite rod.

The invention provides a doped corrosion-resistant dioxin-resistant silicon carbide wear-resistant ceramic material, and relates to the technical field of advanced ceramic materials, the material comprises, by weight, 80-95 parts of silicon carbide powder, 1-10 parts of a functional dopant, 2-8 parts of a sintering aid, 2-5 parts of a flexibilizer, 0.5-3 parts of a dispersant, and 0.5-10 parts of a binder. The core function dopant is core-shell structure nano-powder with an anatase TiO2 core and a mixed valence Ce / Sn silicate shell, and is prepared through sol-gel and heat treatment. On the basis of keeping high strength and high wear resistance of silicon carbide ceramic, the material is successfully endowed with long-acting and stable chemical corrosion resistance and high-temperature dioxin catalytic degradation capability, and the material is suitable for extreme environments such as waste incineration and chemical engineering.

This invention discloses an adaptive graded pressure relief anti-impact anchor bolt based on a disaster-causing link blocking mechanism, relating to the field of deep coal mine roadway support and dynamic disaster prevention technology. It includes an anchor bolt body, with a tray fitted on the outer surface of the anchor bolt body, and an anti-loosening nut threaded onto the outer surface of the anchor bolt body. An adaptive graded pressure relief mechanism is provided between the tray and the anti-loosening nut. This adaptive graded pressure relief anti-impact anchor bolt, based on a disaster-causing link blocking mechanism, utilizes an adaptive graded pressure relief mechanism to form a primary constant resistance diameter expansion component using an interference fit between a variable-diameter thick-walled steel pipe and a high-strength metal cone head. Combined with a secondary honeycomb energy-absorbing component composed of a cylinder and honeycomb aluminum, a dual-modal mechanical response structure is formed. This achieves adaptive graded response to different disaster thresholds, improving the full life-cycle adaptability and failure resistance of the support structure, and solving the problem of existing anchor bolt structures being single-rigid and unable to distinguish between static high loads and dynamic strong impacts.

The utility model discloses a connection structure reinforced titanium-based noble metal oxide deep well anode, and relates to the technical field of deep well anodes, the connection structure reinforced titanium-based noble metal oxide deep well anode comprises a deep well anode main body, a gas guide pipeline, a cable and a reinforcing plate, a performance reinforcing mechanism is mounted among the deep well anode main body, the titanium-based insulating sleeve and the sealing plate; the gas-guide pipeline and the cable are fixedly connected to the inner side of the deep well anode main body; the reinforcing plates are detachably connected to the upper end and the lower end of the titanium-based insulating sleeve, one side of each reinforcing plate is slidably connected with a sliding plate, and a structure reinforcing mechanism is installed between each sliding plate and the titanium-based insulating sleeve. The device is wrapped by graphite, carbon fibers and polytetrafluoroethylene in a gradient mode, the inner layer transmits current in a high-current-guide mode, the middle layer maintains the stable structure in a current-equalizing and pressure-resisting mode, the outer layer is closed, anti-corrosion and wear-resisting modes are achieved, and meanwhile the sliding plate and the toothed plate are dynamically meshed and combined with elastic reset to disperse formation pressure and restrain deformation. The comprehensive performance of efficient conduction, impact resistance and corrosion resistance of the anode is improved.

The present application relates to lost foam casting paint technical field, especially to a kind of casting pipe fittings lost foam paint and quantitative design method.The lost foam paint includes the following components according to weight fraction: composite aggregate 78-88 parts, mullite micro powder 6-9 parts, flaky graphite 3-5 parts, boron nitride micro powder 0.6-3 parts, composite reinforcing fiber 0.3-0.6 parts, suspending agent 1.5-2.5 parts, chelating dispersant 0.15-0.35 parts, binder 0.9-1.3 parts, fluxing agent 2.5-4.5 parts, defoaming agent 0.05-0.15 parts, wetting agent 0.03-0.08 parts;Composite aggregate includes quartz powder 57-70 parts, calcined bauxite 18-25 parts;Composite reinforcing fiber is composed of inorganic short fibers and organic short fibers according to mass ratio (4-6):1.The present application realizes accurate stress adaptation of coating and pipe fittings by "global thermal expansion adaptation, local fiber reinforcement, gradient ceramic strengthening" triple anti-cracking strategy.

The invention belongs to the technical field of acoustic materials, and relates to a sound-absorbing film, a preparation method thereof and a loudspeaker, the sound-absorbing film is made of resin fibers and zeolite particles, the sound-absorbing film has a net structure, the zeolite particles have micropores, and the zeolite particles and the resin fibers are combined to form composite fibers, the composite fibers are mutually staggered to form a net-shaped structure. The composite fibers with the zeolite particles are mutually staggered to form the net-shaped structure, and the net-shaped structure can disperse and absorb part of stress and reduce direct impact on the zeolite particles, so that the possibility of powder falling and crushing of the zeolite particles is reduced; besides, the net-shaped structure of the composite fibers can absorb energy through deformation and slippage, so that brittle fracture of the sound-absorbing film is prevented, the overall strength and toughness of the sound-absorbing film are improved, the sound-absorbing film can be better assembled and matched according to the size of a sound production rear cavity, and the flexibility of the sound-absorbing film in shape and size is improved.

This invention discloses an adaptive buffer structure based on tungsten alloy and its preparation method, belonging to the field of buffer structure technology. It solves the technical problem that existing solutions using a single homogeneous material structure lack the deformation coupling energy absorption capacity of composite material structures. The structure includes a main frame and at least one buffer node connected to the main frame. Each buffer node comprises an energy-absorbing part and a supporting part, which are stacked. Through this stacked composite structure, the buffer node achieves graded energy absorption, significantly improving energy absorption efficiency compared to traditional single buffer structures and drastically reducing initial peak force, effectively coping with multi-load coupling conditions. It also possesses high rigidity, high toughness, and extremely rapid thermoelectric response characteristics, enabling adaptive stiffness adjustment according to changes in external loads, achieving a technological upgrade from passive load bearing to active protection.

This invention discloses an electric motor, a compressor, and a refrigeration device, relating to the field of refrigeration equipment technology. The motor comprises a rotor and a stator, with the rotor rotatably disposed within the stator. The thickness of the permanent magnet in the magnetization direction is h. m And the coercivity is H cj The rotor has p poles; the stator includes a stator core, which comprises multiple stacked first stator laminations and multiple second stator laminations. The first stator laminations are made of silicon steel, and the total length of all first stator laminations along the stator axial direction is h1; the second stator laminations are made of amorphous alloy, and the total length of all second stator laminations along the stator axial direction is h2. At least one first stator lamination is located at the lowest end of the stator core along the axial direction. The technical solution provided by this invention, through relevant parameter constraints, strikes a balance between retaining the low iron loss advantage of amorphous alloy materials and achieving reliable assembly of the stator and the main housing. This avoids compression of the amorphous core, thereby reducing costs and improving compressor energy efficiency.