2741results about How to "Light in mass" patented technology

The invention discloses a lithium iron phosphate battery. The lithium iron phosphate battery comprises a positive electrode, a negative electrode, an isolating membrane and an electrolyte, a main material of the positive electrode comprises lithium iron phosphate, and a main material of the negative electrode comprises graphite and a silicon-based material; the surface density of the positive electrode is greater than or equal to 23mg / cm < 2 >, and the surface density of the negative electrode is greater than or equal to 7.8 mg The electrolyte comprises a lithium salt, a solvent and an additive, the solvent mainly comprises ethylene carbonate and a micromolecular linear solvent, the additive comprises FEC and a negative electrode film-forming additive, and a negative electrode film-forming agent comprises vinylene carbonate and a lithium salt additive; the mass fraction of the micromolecular linear solvent is 35%-60%, the mass fraction of the fluoroethylene carbonate is M, the mass fraction of the silicon element in the negative electrode layer is W1, M is greater than or equal to 2% and less than or equal to 2 * W1, and the mass fraction of the negative electrode film-forming agent is 4%-6%. The energy density of the battery cell can be improved and the cycle life and the quick charge capacity of the battery cell are both considered by doping a silicon-based material into the negative electrode, designing a thick electrode and adjusting an electrolyte formula.

The invention discloses an under-actuated core column type continuum robot for a narrow space task, and belongs to the technical field of multi-degree-of-freedom redundant continuum robots. Comprising a driving device, a plurality of motors are used for controlling winding and unwinding combination of a driving rope, flexible movement of a mechanical arm is achieved, and an expected working pose is achieved. And the guide rail is moved to push the platform, linear motion is executed in the lead range, and the mechanical arm is moved to the designated operation range. The continuum mechanical arm main body consists of N mechanical arm units with the same structure and is divided into M joint sections; a rigid-flexible coupling mode is adopted, and a universal joint structure and a core column structure are combined, so that joints can flexibly deflect, and the torsional rigidity and the overall load capacity are improved; and the end effector is used for executing diversified tasks according to operation requirements. The robot provided by the invention has the advantages of high flexibility, large length-diameter ratio, high torsion resistance, high environmental adaptability and the like, and can meet the requirements of detection and operation and maintenance operation in a narrow unstructured space.

The invention relates to the technical field of medical instruments, in particular to a nerve stimulation electrode based on a shape memory material. The nerve stimulation electrode comprises a flexible packaging electrode body and a substrate crease layer arranged on the surface of the flexible packaging electrode body. The material of the substrate crease layer comprises a shape memory polymer and a nano ferromagnetic material; the substrate crease layer comprises a first bending part which is used for enabling the flexible packaging electrode body to be folded along the length direction of the flexible packaging electrode body. The nerve stimulation electrode can solve the problems that an existing nerve stimulation electrode is hard in appearance, large in overall mass, poor in flexibility and complex in implantation operation.

The invention provides an anchor rod with a barb structure and a construction method.The anchor rod comprises a hollow anchor rod body, a core rod arranged in the anchor rod body and a barb part arranged on the outer side of the anchor rod body, and the length direction of the core rod is the same as that of the anchor rod body; the multiple barb parts are arranged in the length direction of the anchor rod body at intervals, a plurality of barb pieces are arranged on each barb part at intervals, and the barb pieces are obliquely arranged on the anchor rod body. And barb pieces are arranged at the positions, corresponding to the barb parts, of the core rod. According to the anchor rod with the barb structure and the construction method, the core rod is arranged in the hollow anchor rod body, and the barb pieces and the barb pieces are matched to form a special composite stress form, so that the overall pulling resistance of the anchor rod is effectively improved, the construction cost is reduced, and the construction period is shortened; and as the designed length of the anchor rod is obviously shortened, disturbance to the surrounding environment is reduced, and pollution to the environment is reduced.

The invention belongs to the technical field of battery thermal management, and discloses a battery pack and a phase change material coupling liquid cooling composite thermal management system.The battery pack comprises a plurality of battery structures, each battery structure comprises a lithium battery, a fin structure, a phase change material filling area and a liquid cooling plate, and the fin structure is arranged on the periphery of the lithium battery; the liquid cooling plate is arranged on the periphery of the fin structure, a phase-change material filling area is formed between the liquid cooling plate and the fin structure, and the phase-change material filling area is filled with a phase-change material for absorbing redundant heat and generating phase change, so that the temperature fluctuation of the battery is reduced. The lithium bromide heat pump and the direct-current power supply are combined, and accurate adjustment of the temperature of the battery pack is achieved through efficient heat exchange and intelligent control. The system can be rapidly switched between a cooling mode and a heating mode, and it is ensured that the battery is always kept within the optimal temperature range in different working environments.

The invention belongs to the technical field of rock-soil side slope protection, and particularly relates to an expansive soil side slope flexible ecological comprehensive supporting system which comprises an intercepting ditch, a vegetation protection layer, a composite waterproof layer, flexible anchor rods, water seepage and drainage pipes, cultivation and planting soil, a drainage ditch, a backfill soil layer, a step-shaped slope surface, a slope surface and slope protection vegetation. The slope surface is excavated into a step-shaped slope surface, a composite waterproof layer, expansive soil backfill soil, a vegetation protection layer and cultivation and planting soil are sequentially arranged on the step-shaped slope surface from bottom to top, and slope protection vegetation is planted and formed on the cultivation and planting soil; the composite waterproof layer is fixed to the step-shaped slope face through the flexible anchor rods. The vegetation protection layer and the slope protection vegetation together reinforce the shallow soil body, and the composite waterproof layer and the flexible anchor rod play a role in absorbing and relieving the received expansive force. The method has an ecological greening effect, has the functions of common supporting of the shallow surface layer and the deep layer of the expansive soil slope, flexible reinforcement and expansion reduction and allowable generation of a small amount of deformation, is simple in construction and high in efficiency, and can realize long-term stability of the shallow surface layer and the deep layer of the expansive soil slope.

The invention relates to a lithium battery technology, in particular to a solid electrolyte, a lithium battery adopting the solid electrolyte and a preparation method of the lithium battery. The lithium battery comprises a positive plate containing a composite current collector, a negative plate, a diaphragm, a package and a solid electrolyte, the negative plate, the diaphragm and the positive plate are sequentially laminated in the packaging layer, and the solid electrolyte is filled among the negative plate, the diaphragm and the positive plate; the solid electrolyte and the composite current collector have an unexpected synergistic effect in the aspect of improving safety, in a needling experiment, when the solid electrolyte and the composite current collector are used at the same time, a relatively complete electronic insulating layer can be formed on the needling surface when the battery is penetrated by a needling needle, and occurrence of short circuit and thermal runaway is reduced; by using the composite current collector, the mass of the current collector in the battery is reduced, and the reduction of the battery capacity caused by high impedance of the solid electrolyte and the composite current collector is compensated, so that the sacrifice of the energy density of the battery is reduced.

The invention discloses a spine rehabilitation training device, comprising: a rehabilitation training assembly comprising a head and neck supporting mechanism, a thoracolumbar supporting mechanism and a caudal vertebra supporting mechanism which are arranged at intervals from top to bottom and are connected with each other through a flexible connecting piece I, the head and neck supporting mechanism, the thoracolumbar supporting mechanism and the caudal vertebra supporting mechanism each comprise a plurality of air bag supporting pieces arranged at intervals. The plurality of air pumps are respectively used for supplying air to the plurality of air bag supporting pieces so as to adjust the pressure on each part of the body; and the control unit is connected with the plurality of air pumps and can independently control the start and stop of each air pump so as to control the pressure of each air bag supporting piece. Bed-in-bed, physical or exercise rehabilitation treatment methods can be selected according to different periods, and the application range is wide.

The invention discloses a dexterous hand finger based on connecting rod transmission, a bionic mechanical arm and a humanoid robot, belongs to the field of bionic mechanical arms, solves the problem that a transmission mechanism of an existing dexterous hand is low in response speed, and adopts the technical scheme that the dexterous hand finger mainly comprises a finger base and a finger body, a driver and a transmission mechanism in transmission connection with the driver are arranged on the finger base, the driver drives the finger body to bend and / or swing through the transmission mechanism, the transmission mechanism comprises a guide piece and a sliding block installed on the guide piece in a sliding mode, and the sliding block is in transmission connection with the finger body. A traction rope connected with the sliding block is wound on an output shaft of the driver, the driver controls the output shaft to rotate forwards and backwards so as to drag the sliding block to slide back and forth along the guiding piece through the traction rope, and then the finger body is controlled to bend and / or swing. The finger is mainly used for driving the sliding block to move through the pulling rope so as to control the finger body to bend and swing, and the response efficiency of the finger body can be improved.

The invention provides a near-earth orbit neutron and gamma ray detector group, detection equipment and a detection method, and the detection equipment is a neutron / gamma spectrometer which is small in size, small in mass, low in power consumption and high in speed and is designed based on a multilayer single / double sensitive area Si detector and a cadmium zinc telluride (CZT) detector array. The neutron / gamma spectrometer can serve as an independent load to be carried on a small satellite, and measurement of thermal neutrons, fast neutrons below 20 MeV and gamma rays is achieved. Different layers of the detector group in the detection equipment are matched to form a plurality of anticoincidence groups, so that the accuracy of energy spectrum inversion is improved. According to the detection method, a stacking and discarding algorithm is provided, so that interference caused by signal overlapping is avoided, and the system resolution of the whole neutron / gamma spectrometer is improved.

A marching assisting exoskeleton robot comprises a waist supporting structure module, a waist rod module, a joint driving module and a binding system. The waist rod module comprises two groups of waist rod module assemblies which are symmetrically arranged relative to the waist supporting structure module. According to the design scheme provided by the embodiment of the invention, parts can be changed into a whole, the structure of the whole machine is simplified, so that assembling procedures are reduced, the structural complexity can be reduced, and the stability of the machine body is improved. By applying the symmetrical telescopic adjusting module, the machine body can bring better wearing adaptability and comfort to people with different figures. Compared with an existing light walking-aiding exoskeleton robot, the light walking-aiding exoskeleton robot has the advantages of being comfortable and convenient to wear, convenient to operate, high in whole machine protection capacity and high in power-aiding capacity, and in addition, the light walking-aiding exoskeleton robot is small in size and light in mass and has high market competitiveness in exoskeleton robot products of the same type.

The invention relates to the technical field of audio processing, and discloses an audio processing method and device combining WiFi and BLE technologies, equipment and a storage medium, which are used for realizing high-quality and low-delay multi-room multi-channel synchronous playing. The audio processing method combining the WiFi and the BLE technology comprises the steps of obtaining target audio data containing multichannel information, establishing a multi-room audio equipment connection through the WiFi and a BLE Auracast protocol, dynamically configuring a distribution path according to intelligent distance detection, obtaining a configured audio distribution network, adjusting a time sequence of the target audio data by using a BLE Auracast synchronization algorithm, and sending the target audio data to the audio distribution network through the BLE Auracast synchronization algorithm. And according to the configured audio distribution network, sending the synchronized audio data to each device for playing through WiFi or BLE Auracast.

The invention belongs to the field of underwater bionic robots, and relates to a water-air cross-medium bionic robot which comprises a shell, a reciprocating swing mechanism, a wing module, a pelvic fin module and a control system, the shell comprises a front-end shell and a rear-end tail, the front-end shell is connected with the rear-end tail through the reciprocating swing mechanism, and the front-end shell is connected with the rear-end tail through the reciprocating swing mechanism. The wing module is installed at the top of the upper portion of the front-end shell, the pelvic fin module is installed on the rear side of the lower portion of the front-end shell, and the control system is installed in the front-end shell and connected with the reciprocating swing mechanism through a signal line to control the reciprocating swing mechanism to rotate so as to drive the tail of the rear end to swing to conduct cruise propelling and control the pelvic fin module to rotate to dive upwards and float downwards. The wing modules are controlled to be opened and closed to achieve water breaking gliding. The robot is compact in structure, small in size and light in weight, can achieve various motion postures in air and water, can meet application scenes in various environments, and particularly has high adaptability in the aspects of water-air cross-medium information collection and sending, information exploration and the like.

The invention belongs to the field of computer aided design, and discloses a design method of a multistable metamaterial with an ideal energy absorption characteristic, which comprises the following steps of: firstly, carrying out theoretical analysis on a buckle to establish a mathematical model; then, according to the theoretical solution of the rigidity value of the buckle structure, reverse topological optimization design is carried out on the curved beam, so that a force displacement curve of the curved beam has negative rigidity and peak force corresponding to the buckle. The buckle structure and the optimized and customized curved beam are assembled through the functional part, and the multistable metamaterial unit cell with the ideal energy absorption characteristic can be obtained. And programming design is carried out on the unit cells, so that the required metamaterial can be constructed to meet the energy absorption requirement under the complex load. The technical scheme is widely applicable to the fields of aerospace, automobile industry, building protection and the like, and excessive rebound of impact energy is avoided while the impact resistance of equipment is improved.

The invention relates to the field of high polymer materials, and discloses an environment-friendly building energy-saving sound insulation material and a preparation method thereof.The environment-friendly building energy-saving sound insulation material is prepared from, by weight, 100-120 parts of modified polyether polyol, 140-150 parts of isocyanate, 8-12 parts of modified hollow glass beads, 5-8 parts of modified sericite, 3-5 parts of ammonium polyphosphate, 2-4 parts of foaming agent, 1-3 parts of stabilizer and 0.1-0.5 part of catalyst; the modified polyether polyol is polyether polyol containing phosphorus and a phase change energy storage chain segment, the modified hollow glass beads are composite coupling agent surface modified hollow glass beads, the modified sericite is triazine flame retardant intercalation modified sericite, and the triazine flame retardant is a triazine derivative containing a siloxane structure and a DOPO structure. The rigid foaming polyurethane material is prepared from the modified polyether polyol and the isocyanate, and the modified hollow glass beads, the modified sericite and the ammonium polyphosphate are added, so that the material has excellent heat insulation and flame retardant properties and also has good mechanical properties.

The present invention discloses a method, device, equipment and medium for optimizing a well group injection and production scheme based on a logistic regression algorithm, including: dividing a training set and a test set; constructing a sliding time window optimization algorithm based on a Pearson correlation coefficient algorithm; constructing a production prediction model based on logistic regression, and training the production prediction model at varying time intervals and a number of different preset time periods; verifying the production prediction model based on a test set; determining the upper limit of water injection and the upper limit of liquid production of the well group; taking the upper limit of water injection and the upper limit of liquid production as extreme values, traversing a number of combinations of water injection and liquid production, and predicting the unit time oil production of each combination based on the production prediction model; taking the maximization of unit time oil production and the minimum adjustment degree of the combination as the goal, outputting the optimal combination of water injection and liquid production of the well group. The present invention belongs to the field of well network oil production. The present invention can improve the development and management efficiency of water-injected oil fields.

The invention relates to the technical field of perovskite solar cell preparation, in particular to a bulk phase passivation perovskite light absorption layer, a solar cell and a preparation method, the bulk phase passivation perovskite light absorption layer is prepared by adopting a perovskite layer prefabricated liquid, the perovskite layer prefabricated liquid comprises (FA 0.95 MA0.05) 0.95 Cs0.05 Pb (I 0.95 Br0.05) 3 and m-F-PEACl, the molar concentration ratio of the (FA 0.95 MA0.05) 0.95 Cs0.05 Pb (I 0.95 Br0.05) 3 to the m-F-PEACl is 1.5: (0.1-1), m-F-PEACl and (FA < 0.95 > MA0. 05) < 0.95 > Cs0. 05Pb (I < 0.95 > Br0. 05) 3 are matched to form a bulk phase passivated perovskite layer, so that organic cations in the m-F-PEACl interact with uncoordinated lead ions or other defect sites in the (FA < 0.95 > MA0. 05) < 0.95 > Cs0. 05Pb (I < 0.95 > Br0. 05) 3 to form a stable complex or compound, the defect concentration in perovskite is reduced, comprehensive and effective passivation is realized, and the performance of the perovskite is improved. Therefore, the photoelectric property and the stability of the perovskite material are improved. The problem that comprehensive and effective passivation cannot be achieved through a perovskite thin film passivation method in the prior art is solved.

The invention belongs to the technical field of new materials, and particularly relates to a PEDOT electromagnetic shielding polymer film, a preparation method and application, a substrate coated with an oxidizing agent solution is subjected to a polymerization reaction in steam containing an EDOT monomer, then an oxidizing agent is removed, drying is performed, and the PEDOT electromagnetic shielding polymer film is obtained; the oxidant solution comprises ferric salt, an additive and water, and the additive is one or more of polyvinyl alcohol, polyvinylpyrrolidone, starch, polyethylene glycol and a polyoxypropylene polyoxyethylene copolymer; the PEDOT electromagnetic shielding polymer film provided by the invention has relatively high density and lower resistance, and can improve the electromagnetic shielding effect.

The invention provides an environment control unit for a scanning electrochemical probe microscope, which comprises a sealing pool, a cavity is arranged in the sealing pool, the sealing pool is provided with an air inlet, an air outlet, a probe access port and a transparent observation window, the sealing pool is internally provided with a sample table, and the sample table is provided with an air inlet, an air outlet, a probe access port and a transparent observation window. And the probe extends into the cavity through the probe access port and then is close to the surface of the sample. The micro-nano probe is used in the scanning electrochemical probe microscope technology, specific atmosphere is introduced around the micro-nano probe (the diameter of the top end is dozens of nanometers to dozens of microns), specific humidity is kept, interference of air on reaction is avoided, or gaseous reactants are provided for the reaction, and proceeding of the reaction is promoted.

The invention discloses a special-shaped magnetic tile which comprises a magnetic tile body, the magnetic tile body is provided with five magnets and is composed of three groups of different magnetic tiles, the back of the magnetic tile body is of an arc structure, and the bottom of the magnetic tile body is of a horizontal structure. The outer sides of a group of same magnetic blocks on the left side and the right side of the magnetic tile body structure are ground into fillets with the same radius. The special-shaped magnetic shoe has the advantages of being large in magnetic force, small in weight and small in size, compared with an existing magnetic shoe combination, the special-shaped magnetic shoe has the higher magnetic mass ratio, the heavy-load operation capacity of a vertical face walking robot is greatly improved, and high economic benefits and safety are achieved.

The invention provides a broadband stealth material based on an active regulation and control metasurface and a preparation method. A cross structure resistive frequency selection surface, a first dielectric layer, a second dielectric layer, a square ring structure resistive frequency selection surface, a third dielectric layer, a fourth dielectric layer, a multi-fractal structure active frequency selection surface, a fifth dielectric layer, a multi-fractal structure active frequency selection surface, a sixth dielectric layer and a metal backboard are sequentially arranged from top to bottom. The problem that low-frequency wave absorption of a passive absorber and high-frequency wave absorption of an active absorber are difficult to realize at the same time is solved. Resistance type frequency selective surfaces of a cross structure and a square ring structure are adopted for cascade connection, a wide absorption frequency band is generated at high frequency, and a centrosymmetric pattern is adopted, so that polarization stability is achieved. A double-layer multi-fractal structure frequency selective surface is adopted, and a variable capacitance diode and a chip resistor are loaded, so that active tuning of an absorption frequency band can be realized at low frequency. The working range covers the P-K wave band, and the application potential is achieved in the aspects of electromagnetic regulation and control, radar stealth and the like.

The invention belongs to the technical field of construction waste treatment, and discloses a construction waste crushing treatment device for house building construction. Comprising a crusher body and a base; the top end of the base is fixedly connected with a conveying frame through multiple sets of elastic sheet plates. The feeding end of the conveying frame communicates with the discharging end of the pulverizer body through a hose. A strong magnetic roller is installed in the conveying frame, a driving mechanism is installed between the base and the conveying frame, and materials in the conveying frame are conveyed in a vibrating mode through matched use of the driving mechanism and an elastic piece plate. A shifting mechanism is mounted between the base and the conveying frame, and metal fragments adsorbed on the strong magnetic roller are shifted to one side of the conveying frame through the shifting mechanism; according to the device, metal fragments adsorbed on the strong magnetic roller can be effectively removed, and the metal removal efficiency and accuracy are improved.

The invention discloses rice germs rich in gamma aminobutyric acid and a preparation method, and belongs to the field of rice germs.The rice germs and a fermentation bin are included, and the rice germ preparation method comprises the following steps that S1, placing is conducted, specifically, the rice germs are placed in a bearing mechanism; s2, screening: screening the rice germs in the bearing mechanism through a screening mechanism, and selecting proper rice germs; through cooperative use of the devices and arrangement of the temperature control mechanism, the dewatering and drying mechanism and other structures, rice germs are placed in the bearing mechanism, the rice germs are screened through the screening mechanism, the rice germs meeting the requirements are screened out, and through continuous screening of the rice germs, the quality of the rice germs is improved. By arranging the sealing plate, the sealing plate does not seal the fermentation bin any more, the rice germs enter the fermentation bin, and by arranging the temperature control mechanism, the temperature and humidity in the fermentation bin are controlled, so that the rice germs are fermented in the fermentation bin, and the rice germs become active rice germs.

The invention relates to a method for adjusting a torque assist of a drive unit of a vehicle, in particular a single-track vehicle, for example an electric bicycle, the torque assist being based on a portion of a system model and on an enhanced portion of a pedaling torque provided by a rider with an assist coefficient, the assist coefficient is determined dependent on the pedaling torque, in particular progressively dependent, and wherein the system model is based at least on the speed and / or acceleration of the vehicle and on compensation of disturbance variables, in particular gradient, inertia and frictional resistance.

The invention belongs to the technical field of vibration control, and discloses a tuning inerter mass damper containing a steel wire rope vibration isolator, which comprises a main body structure, a suspension bracket, a suspension steel wire rope, an annular mass block, a spring support, a steel wire rope vibration isolator, an inerter unit and a turning device, and the suspension bracket, the spring support and the turning device are welded on the main body structure; the upper end of the suspension steel wire rope is connected with the suspension bracket; the annular mass block is connected with the steel wire rope vibration isolator and the inerter unit; the other end of the steel wire rope vibration isolator is connected with the main body structure through a spring support, and the inerter unit is connected with the main body structure through a turning device. The device has the functions of a spring element and a damping element of a traditional tuned mass damper at the same time, the installation space is saved, the gear and rack type inerter is added, the mass amplification characteristic of the inerter unit is utilized, the mass needed by the vibration reduction device is greatly reduced on the premise that the vibration reduction performance is guaranteed, and wind loads in different directions are coped with through the direction changing device.

The invention discloses a glass fiber reinforced nylon material with high alcoholysis resistance, and relates to the technical field of glass fiber reinforced nylon materials. Raw materials of the high-strength and high-toughness composite material comprise the following components in parts by weight: 30-43 parts of PA46, 20-25 parts of PA66, 15-7 parts of PA115, 3-5 parts of bio-based nylon, 20-45 parts of alkali-free glass fibers, 1-3 parts of polyethylene, 0.5-3 parts of an antioxidant, 0.2-3 parts of a heat stabilizer, 0.1-5 parts of a compatilizer, 1-5 parts of a flexibilizer, 0.2-0.5 part of a hydrolysis-resistant agent, 1-2 parts of an ultraviolet light absorber, 0.1-2 parts of a silane coupling agent, 0.1-0.5 part of a nucleating agent, 1-5 parts of hollow glass beads and 3-8 parts of mica. The glass fiber reinforced nylon material is prepared by mixing the raw materials according to the set proportion and sequence, the glass fiber reinforced fiber material with high alcoholysis resistance is finally obtained, a small amount of mica is added into the matrix raw materials, the insulativity and heat resistance of the prepared glass fiber reinforced nylon material are improved to a certain extent, and the service life of the glass fiber reinforced nylon material is prolonged. The range of products made of the material is expanded, the stability of the products is improved, and the products can resist corrosion of strong acid and strong alkali.

The invention provides a PtCo-based composite catalyst and a preparation method and application thereof.The PtCo-based composite catalyst comprises a carrier and a load, the carrier comprises mesoporous carbon, the load comprises platinum-cobalt-based metal particles and a compound with the chemical formula being HxMO3, and M comprises W or / and Mo; a contact interface exists between the platinum-cobalt-based metal particles and the compound with the chemical formula of HxMO3; the platinum-cobalt-based metal particles comprise a first part of the platinum-cobalt-based metal particles, and the first part of the platinum-cobalt-based metal particles are supported in the mesoporous structure of the mesoporous carbon. According to the PtCo-based composite catalyst, a contact interface exists between HxMO3 and PtCo-based metal particles, the catalytic activity of platinum and cobalt can be improved, and reduction of oxygen on the surface of the catalyst is facilitated; part of platinum-cobalt-based metal particles are supported in a mesoporous structure of mesoporous carbon, so that the stability of the catalyst can be improved.

The invention belongs to the technical field of hydrocyclones, and discloses a two-stage series integrated nested classification hydrocyclone which comprises a first-stage cylinder, the top end of the first-stage cylinder is connected with a top cover, and the top cover of the first-stage cylinder is connected with an overflow pipe; the bottom end of the first-stage cylinder is connected with an inverted outer circular truncated cone cylinder, an upright inner circular truncated cone cylinder is arranged in the outer circular truncated cone cylinder in a sleeved mode, and the bottom end of the outer circular truncated cone cylinder and the bottom end of the inner circular truncated cone cylinder are connected in a sealed mode through an annular groove. A second-stage cylinder is arranged in the first-stage cylinder in a sleeving manner, one end of the second-stage cylinder is connected with the top cover, the other end of the second-stage cylinder is connected with a second-stage circular truncated cone cylinder, the second-stage circular truncated cone cylinder is arranged in the inner circular truncated cone cylinder in a penetrating manner, and the second-stage cylinder is connected with the inner circular truncated cone cylinder; a spiral guide plate is connected in the second-stage cylinder, and a plurality of spiral inlets are formed in the side wall of the second-stage cylinder; the invention solves the problems that the underflow is fine during the grading operation of the cyclone, the grading precision of the single cyclone is insufficient, and the energy loss of the intermediate pipeline of the series cyclone is too much.

The invention discloses a silicone oil-based magnetic liquid with low volatility and radiation resistance as well as a preparation method and application thereof, and relates to the technical field of nuclear reactors. The silicone oil-based magnetic liquid comprises nano magnetic particles, a modifier, a surfactant and a base carrier liquid, the nano magnetic particles are changed from water solubility to oil solubility under the action of the modifier, the surface of the nano magnetic particles modified by the modifier is coated with the surfactant, and the base carrier liquid comprises polymethylphenyl siloxane fluid. The silicone oil-based magnetic liquid prepared by the invention has the advantages of chemical inertness, thermal stability, oxidation resistance, low vapor pressure, low ignition point and the like of conventional silicone oil, also has better high temperature resistance, radiation resistance, lubricating property and dissolving property, has the working temperature of-50 DEG C to 250 DEG C, and is excellent low-volatility and radiation-resistant silicone oil-based magnetic liquid.

The invention discloses an impact type rotating wheel hollow water bucket structure and a manufacturing method thereof, and relates to the technical field of hydroelectric power generation, in particular to the manufacturing method of the impact type rotating wheel hollow water bucket structure, which comprises the following steps: S1, preparing an impact type rotating wheel hub and a water bucket root solid area through forging, milling, polishing and other process means; s2, calculating a water bucket hollow part model through the working stress of the rotating wheel; and S3, the prepared rotating wheel hub is clamped to a positioner, and according to the model calculated in the above steps, the additive manufacturing of the rotating wheel hollow water bucket is achieved by continuously and cooperatively adjusting the spatial position of the rotating wheel and the posture of a welding gun. The invention has the advantages of reducing the weight, improving the stability, reducing the inertia, prolonging the service life, saving the cost, promoting the sustainable development, optimizing the structural design, improving the performance, improving the efficiency, reducing the energy consumption, being convenient to manufacture and maintain and enhancing the adaptability.