214results about How to "Performance is not affected" patented technology

The invention discloses a data storage system of a digital country based on cloud computing, which comprises a client, a data transmission module and a cloud computing center, relates to the technical field of data storage, stores hot data on a high-performance hot data storage layer, ensures that frequently accessed data can be quickly responded, improves the system performance, and at the same time, stores the hot data on a high-performance hot data storage layer. The cold data is stored in a low-performance cold data storage layer, the storage cost is reduced, effective balance of performance and cost is achieved, the data is automatically migrated among different storage layers along with change of data access frequency, so that the performance and the cost are balanced, the frequently accessed data is migrated into a cache, the access speed of the data is increased, and the data access efficiency is improved. And establishing a relationship between a time interval and a data type of historical data, predicting data which are possibly accessed in a given time interval, adding the data into the cache, dynamically adjusting the cache, and ensuring the validity of the cache.

The invention belongs to the technical field of cable manufacturing, and discloses a large-section cable for vehicle end bridging, which sequentially comprises a conductor layer, an insulating layer, a shielding layer and a sheath layer from inside to outside, the shielding layer comprises a forward winding type braided shielding wire and a reverse winding type meta-position aramid fiber, the braided shielding wire is formed by twisting a plurality of strands of metal alloy, and the sheath layer is arranged between the conductor layer and the insulating layer. The meta-position aramid fiber adopts stranded meta-position aramid fiber filaments as reverse winding weaving filaments, the sheath layer adopts high-temperature hot drying tunnel vulcanization extrusion type silicone rubber, the temperature of a high-temperature section of a drying tunnel is not lower than 400 DEG C, the vulcanization time is not less than 1 minute, and the meta-position aramid fiber is embrittled and cracked until carbonization failure due to the high temperature of the high-temperature section of the drying tunnel. The cable is suitable for production of a winding shielding layer of a large-section cable for vehicle end bridging with silicone rubber as an insulating layer and a sheath layer, and through introduction of reverse winding meta-position aramid fibers, on the basis of not influencing the use of the whole product, the product structure is further stabilized, and the use stability and safety of the product are ensured.

The invention relates to the technical field of high-molecular compounds, in particular to a diamine monomer, self-repairing thermoplastic polyimide resin and a preparation method. The molecular structural formula of the diamine monomer is # imgabs0 #, in the formula, Y is one of N atoms or O atoms, and m is any integer between 1 and 5. The self-repairing thermoplastic polyimide resin prepared from the diamine monomer has a dynamic disulfide bond cross-linked structure, and compared with a structure containing a disulfide bond in a polyimide main chain, the polyimide resin has higher structural strength and better performance after being repaired; the technical problems that an existing polyimide material is poor in material self-repairing capacity and poor in mechanical property can be effectively solved.

The utility model provides a pole, a top cover assembly, a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, the pole comprises at least one first connecting part and at least two second connecting parts, along a second direction, the first connecting part has a third surface; the at least two second connecting parts are used for being connected with the tabs, each second connecting part comprises a main body part and a first flanging part, each first flanging part is connected to one end face, in the second direction, of the corresponding main body part and extends towards the corresponding first connecting part, each first flanging part is connected with the corresponding first connecting part, and each first flanging part is provided with a fourth face in the second direction; and the fourth surface and the third surface are positioned on the same side in the height direction of the post terminal, are positioned on the same plane and form a second surface. Therefore, the processing of the pole is more convenient, and the size of the pole in the width direction can be reduced.

The invention discloses a quartz fiber with an yttrium oxide coating and a preparation method of the quartz fiber, and belongs to the field of preparation of wave-transparent ceramics. Aiming at the problem that the performance of the existing quartz fiber is reduced at a high temperature, the invention provides the preparation method of the quartz fiber with the yttrium oxide coating, which comprises the following steps: impregnating the quartz fiber by using yttrium oxide sol, and drying and sintering the impregnated quartz fiber to obtain the quartz fiber coated with the yttrium oxide coating on the surface; the preparation process of the yttrium oxide sol comprises the following steps: sequentially adding a coordination agent and a stabilizer into a yttrium nitrate solution, stirring and dissolving to form a mixed solution, adding a pH regulator to adjust the pH value of the mixed solution to 7-8, heating to a target temperature, and cooling to obtain the yttrium oxide sol. The yttrium oxide coating covers the surface of the quartz fiber, so that the high-temperature sintering resistance of the quartz fiber can be greatly improved; the preparation process of the yttrium oxide sol is simple in technology and low in cost, the prepared yttrium oxide sol is good in stability and can be better attached to the surface of the quartz fiber, and the dipping effect is improved.

The invention belongs to the technical field of hydrogen production electrolytic cells, and particularly relates to a preparation method of an electrode for a hydrogen production electrolytic cell, and the preparation method at least comprises the following steps: providing a base material; forming a first catalyst layer on the substrate; and forming a second catalyst layer on the first catalyst layer, when the second catalyst layer is formed, a stabilizer is added into the electrochemical liquid medicine, and the stabilizer comprises one or a combination of more of sodium citrate, potassium citrate, sodium gluconate, disodium ethylene diamine tetraacetate and sodium tartrate. By means of the preparation method of the electrode for the hydrogen production electrolytic cell, the stability of the catalyst on the base material can be improved, exertion of the activity of the catalyst is not affected, then the performance of the water electrolysis hydrogen production electrode is improved, the preparation cost can be reduced, and the preparation process can be simplified.

The plate heat exchanger convenient to clean comprises a fixed clamping plate, a movable clamping plate and a supporting frame, two supporting feet are fixedly installed at the bottom of the fixed clamping plate, the fixed clamping plate is fixedly installed at one end of the supporting frame, and a plurality of heat dissipation plate sheets are fixedly installed between the fixed clamping plate and the movable clamping plate. Four flange plates are fixedly installed on the fixed clamping plate, a movable clamping plate is movably placed on the supporting frame, a plurality of installation holes are evenly formed in the outer wall of the movable clamping plate and the outer wall of the fixed clamping plate, supporting rods are fixedly placed in the installation holes, and the other ends of the supporting rods are connected with fixing nuts in a screwed mode. The heat dissipation device is simple in structure and convenient to use, the stability of the heat dissipation device is conveniently improved through the arrangement of the base and the supporting legs, meanwhile, the two fixing rods arranged in parallel are fixedly installed on the supporting frame, the movable clamping plates and the heat dissipation plate pieces are movably installed on the fixing rods, and therefore the disassembly and assembly speed of the heat dissipation plate pieces is further increased.

The invention discloses radiation refrigeration nanocellulose aerogel and a preparation method thereof, and belongs to the technical field of aerogel materials.The preparation method comprises the steps that polyvinyl alcohol, nanocellulose and / or borax serve as raw materials, N, N '-methylenebisacrylamide and methyl-trimethoxysilane are added, composite wet gel is obtained, the composite wet gel is directionally frozen, and the radiation refrigeration nanocellulose aerogel is prepared. The lowest heat conductivity coefficient of the radiation refrigeration nanocellulose aerogel can reach 34.56 mW.m <-1 >. K <-1 >, the highest compressive strength can reach 291 Kpa, and the highest cooling temperature can reach 15 DEG C. The aerogel is expected to be applied to the related fields of cold-chain logistics packaging, building energy conservation and the like.

The invention relates to the technical field of pelvic floor magnet therapy, and discloses a pelvic floor magnet therapy device which comprises a hollow magnet therapy coil and further comprises a magnetic induction box with a top cover with ventilation holes. One end of each movable enclasping support is fixed on the lateral inner wall of the magnetic induction box, and the other end of each movable enclasping support is an arc-shaped positioning surface close to the hollow magnetic therapy coil; the at least one heat insulation pad is configured between the bottom of the magnetic induction box and the hollow magnetic therapy coil; wherein the hollow magnetic therapy coil is movably arranged on the heat insulation pad and is also positioned in the arc-shaped positioning surface of the movable holding support. According to the pelvic floor magnetic therapy device, the installation performance and the easy maintenance performance of the hollow magnetic therapy coil are improved, the overall heat dissipation performance of the device is enhanced, noise is reduced, the magnetic gathering effect is enhanced, the performance of the pelvic floor magnetic therapy device is not affected even if a patient can take the pelvic floor magnetic therapy device for a long time, the use comfort performance of the pelvic floor magnetic therapy device is improved, and the service life of the pelvic floor magnetic therapy device is prolonged.

The invention discloses a compact circularly polarized filtering patch antenna which comprises an upper dielectric substrate and a lower dielectric substrate, a positive 45-degree main radiation patch, a pair of inclined rectangular parasitic patches which are arranged in a positive 45-degree direction and are parallel to the main radiation patch, and a pair of L-shaped parasitic patches which are arranged in a diagonal line in the positive 45-degree direction are printed on the upper dielectric substrate; a pair of vertical rectangular parasitic patches which are arranged diagonally at minus 45 degrees are printed on the lower surface of the upper-layer dielectric substrate; a floor is printed on the upper surface of the lower dielectric substrate, a middle rectangular groove is etched in the middle lower portion of the floor, four edge rectangular grooves are etched in the edge of the floor, a microstrip feeder line and a branch knot are printed on the lower dielectric substrate, and signals enter from a port and are coupled to the main radiation patch through the middle rectangular groove in the floor via the microstrip feeder line. And the main radiation patch is coupled and excited to the peripheral parasitic patches. By using the compact circularly polarized filtering patch antenna provided by the invention, the circularly polarized radiation performance with a compact structure and good band-pass filtering response is realized.

The invention relates to a flame-retardant sponge based on a biomass flame retardant and a preparation method of the flame-retardant sponge. The flame-retardant sponge is prepared from the following components in parts by weight: 90 to 110 parts of polyether polyol, 50 to 90 parts of MDI (methylene diphenyl diisocyanate) or TDI (toluene diisocynate), 0 to 0.5 part of chain extender, 0.05 to 4 parts of efficient foam stabilizer, 0.05 to 0.5 part of efficient composite catalyst, 0 to 6 parts of external foaming agent, 1 to 5 parts of water and 0.1 to 2 parts of biomass flame retardant, the preparation method of the biomass flame retardant comprises the following steps: reacting sodium phytate with hydroxypropyl-beta-cyclodextrin, carrying out suction filtration, washing, and carrying out vacuum drying to obtain the biomass flame retardant of the phytic acid cyclodextrin ester. The preparation method has the advantages that the biomass material-grade halogen-free flame retardant is added in synthesis of a polyurethane flexible foam material, and phytic acid cyclodextrin ester with flame retardance is anchored to PU, so that a durable flame-retardant effect is achieved; the flame retardant is free of pollution and harm, the addition amount of the biomass flame retardant is small, the performance of the PU is not affected, and the effect of being free of smoke poisoning can be achieved.

The invention discloses polymer slurry, a high-performance and high-safety lithium battery diaphragm as well as a preparation method and application of the high-performance and high-safety lithium battery diaphragm. The polymer slurry comprises a cosolvent, an additive, an aramid polymer and an organic solvent I, wherein in the synthetic raw materials of the aramid fiber polymer, the molar ratio of a phthaloyl chloride monomer to a phenylenediamine monomer is (0.8-0.99): 1. The lithium battery diaphragm comprises a base membrane and a porous aramid fiber membrane loaded on the base membrane, and the porous aramid fiber membrane is obtained by solidifying polymer slurry coated on the base membrane. The invention designs and provides the slurry containing the low-molecular-weight para-aramid nanofiber, the slurry is coated and prepared into the lithium metal battery diaphragm, and the cycle performance of the lithium metal battery can be greatly improved; and the lithium battery diaphragm prepared by the invention is relatively high in thermal stability and mechanical strength, and is beneficial to improving the safety of the lithium battery.

The invention discloses preparation and application of a carbon-based fine desulfurizer for one-step conversion of recyclable carbonyl sulfide into elemental sulfur, and belongs to the field of environmental protection. The preparation method comprises the following steps: (1) dissolving a carbon-nitrogen precursor and a transition metal precursor in a solvent, and carrying out stirring reaction at room temperature; (2) centrifuging the turbid liquid obtained in the step (1), and drying to obtain a solid a; (3) roasting the solid a obtained in the step (2) in an inert atmosphere to obtain a solid b; and (4) carrying out acid pickling and drying on the solid b obtained in the step (3), and then reducing in a reducing atmosphere to obtain the target product carbon-based fine desulfurizer. After the prepared catalyst is treated in a reducing atmosphere, the coordination microenvironment of metal is improved, stable metal-nitrogen active sites are formed, and the metal is effectively prevented from reacting with sulfur element to generate metal sulfate and metal sulfide. The catalyst can be regenerated and used after being purged by high-temperature Ar gas, the catalytic performance of the catalyst is not affected, and the catalyst is superior to a commercial Al2O3 catalyst.

The embodiment of the invention discloses environment-friendly gas insulation alternating current metal closed looped network switch equipment which comprises a gas box, an instrument chamber, a mechanism chamber and a cable chamber, a three-position disconnecting switch, a copper bar, a copper bar, a wire outlet sleeve and a circuit breaker are arranged in the gas box, and the gas box is filled with dry gas. The connection part of the copper bar and the circuit breaker, the isolation knife of the three-position isolation switch, and the connection part of the copper bar and the lower outgoing line sleeve and the three-position isolation switch are respectively provided with a compression ring, and the surface of the compression ring is provided with a vulcanization layer. Through the design of the compression ring, the electrode shape is optimized, the electric field intensity is reduced, the uneven electric field of the electrode is avoided, the electric field distribution is improved, and the partial discharge is strictly controlled, so that the electric field distribution is optimized, the phase spacing and the ground spacing are reduced, and the volume of the gas tank is effectively reduced on the premise that the performance is not influenced.

The present invention relates to a coffee table, and provides a lifting coffee table, comprising a desktop, a bottom support frame, a lifting device and a switch; the lifting device comprises two pairs of cross-hinged support rods, comprising a first support rod and a second support rod, the upper part of the first support rod is rotatably connected with a first pulley, the bottom of the desktop is provided with a first slide rail matching the first pulley, the first pulley can slide along the length direction of the first slide rail, the lower part of the second support rod is rotatably connected with a second pulley, the bottom support frame is provided with a second slide rail matching the second pulley, the second pulley can slide along the length direction of the second slide rail, the lifting device is used to control the lifting of the desktop, and the switch is connected to the lifting device and is used to control the start and stop of the lifting device. The lifting coffee table of the present invention has the advantages of small footprint, convenient lifting, and height adjustable.

A suppression element includes a passivation composition supplier and a polar solution supplier. The passivation composition supplier is capable of releasing a metal ion (A), selected from a non-lithium alkali metal ion, an alkaline earth metal ion or a combination thereof, and an aluminum etching ion (B). The polar solution of the polar solution supplier carries the metal ion (A) and the aluminum etching ion (B) to an aluminum current collector to etched through thereof, and the metal ion (A) and the aluminum ion, generated during the etching, are seeped into the electrochemical reaction system. Then,the positive active material is transferred to a crystalline state with lower electric potential and lower energy, and the negative active material is transferred y to an inorganic polymer state with higher electric potential and lower energy to prevent the thermal runaway from occurring.

The invention relates to the technical field of batteries, in particular to a battery pole piece, a preparation method of the battery pole piece, a lithium ion battery and an electric vehicle. The battery pole piece comprises a foil and an electrode material layer which are arranged in sequence, the material of the electrode material layer comprises manganese-cobalt-nickel oxide, the chemical general formula of the manganese-cobalt-nickel oxide is MnxCoyNizO, x is equal to 0.2-0.4, y is equal to 0.2-0.4, z is equal to 0.4-0.6, and x + y + z is equal to 1. The invention aims to improve the low-temperature performance of the battery without influencing the performance of the battery in a high-temperature environment.

The application belongs to the technical field of combustion engines, and provides a large-size side exhaust pipe of a turboshaft engine, which comprises: a pipe body having an inlet end and an outlet end; an outlet reinforcing structure arranged at the outlet end region of the pipe body; a support structure arranged inside the pipe body; an anti-abrasion connecting structure arranged at the inlet end of the pipe body; and an internal flow passage of the pipe body is configured to guide the gas input from the inlet end to be discharged laterally at the outlet end, the internal flow passage of the pipe body has a preset expansion cone angle θ2, the flow passage center line of the pipe body is a three-dimensional space curve constructed based on a non-uniform rational B-spline curve, and the ratio of the outer diameter size of the inlet end to the center transverse distance between the inlet end and the outlet end satisfies a preset condition. The core aerodynamic problem of "complex internal flow field organization of a large-size side exhaust pipe, non-uniform outlet flow field and small effective aerodynamic area" in the prior art is solved, and the limit performance of the exhaust pipe is excavated without affecting the performance of the engine.

The invention relates to the technical field of precious metal alloy material manufacturing, in particular to a process for hardening treatment of gold through micro-nano metal powder, which comprises the steps of blank charging, smelting, vacuum ingot casting, surface cleaning, rolling stretching and age hardening, product surface treatment, product welding and the like. The method has the advantages that in the aspect of material selection, the micro-nano metal powder, such as titanium powder and cobalt powder, is diversified and is small in adding amount, various strengthening mechanisms can be provided, and the economical efficiency is guaranteed. The smelting process is accurate, good vacuum and temperature control is achieved, and stirring is uniform after micro-nano metal powder is added. And rapidly solidifying the cast ingot by using a water-cooling copper mold, treating the surface by using aqua regia and the like, and drying. Midway annealing can be executed through rolling and stretching, and the process is flexible. Product manufacturing processes are diversified, and surface treatment includes polishing, electroplating, coloring and the like. Advanced modes such as laser are adopted for welding to avoid hardness reduction. According to the process, the gold hardening treatment effect and quality are improved from multiple aspects, different requirements are met, and wide application prospects are achieved.

The utility model discloses an indoor ski field racing track conversion construction structure which comprises a temporary conversion node, the temporary conversion node comprises a profile steel stand column, a flange is connected to the top of the profile steel stand column through a pin shaft, and a reinforced concrete beam column and a profile steel concrete beam column top are fixedly connected to the bottom of the profile steel stand column. The outer wall of the reinforced concrete beam column is fixedly connected with a rock wool composite board; the lower half part of the temporary transfer node is embedded in the snowway structural layer, the outer wall of the temporary transfer node is coated with a heat preservation layer, the upper side of the heat preservation layer is fixedly connected with a second leveling layer, and a mounting gap is formed between the upper half part of the temporary transfer node and the snowway structural layer at intervals; a waterproof layer and a protective layer are fixedly connected between the installation gap and the heat preservation layer, and foaming polyurethane is poured into an inner cavity of the profile steel stand column. The problem that when an indoor ski field has the requirement of irregularly holding sports events, a temporary structure conversion node needs to be reserved on a slide way, but a structure meeting the requirement does not exist at present is solved.

The utility model relates to the technical field of computers, in particular to a memory low-speed signal testing jig, which comprises a jig shell, a signal processing module and a signal processing module, and is characterized in that the jig shell comprises a cavity, the size of the cavity is matched with that of a memory to be tested, and the jig shell is sleeved on the memory to be tested; a plurality of conductive contact pieces are arranged in the cavity and are used for being in corresponding contact connection with signal contact pieces of a memory to be tested; the signal interface is connected with an oscilloscope through a signal line; and the plurality of conductive contact sheets are electrically connected with the signal interface through a circuit in the jig shell. According to the utility model, the to-be-tested signal required by research and development is led out of the memory slot, and the jig is nested, so that only the golden finger of a target low-speed signal is in contact, and the golden finger of a high-speed signal is not in contact, and crosstalk is not introduced to influence the quality of the high-speed signal; and the high-speed signal performance of the memory is not influenced on the premise of conveniently researching and developing a memory low-speed related signal test.

The present application relates to a kind of preparation methods of smoke-suppression type emulsion explosive composite wax resin, including using the C5 olefin rich component of 50~75 ℃ of cracking C5 rectification interception as raw material, first by the cationic polymerization of anhydrous aluminium chloride catalysis to obtain refined resin liquid D, then copolymerization with p-divinylbenzene and allyl phosphoric acid diester.The emulsion explosive composite wax prepared by the present application has good environmental protection and comprehensive physicochemical properties, and has important significance for the preparation and application of environmental protection type emulsion explosive.

The utility model discloses a composite current collector for a battery, which comprises a base film layer, aluminum film layers are formed on the front side and the back side of the polymer base film layer in a film coating mode, and copper film layers are formed on the surfaces of the aluminum film layers on the front side and the back side in a film coating mode. The aluminum film layer and the copper film layer are sequentially formed on the surface of the base film layer in a film coating mode and the like, and compared with the mode that a battery current collector in the prior art only uses a copper coating film or a copper foil, the multi-layer structure of high molecules, the aluminum layer and the copper layer is adopted, so that the cost is saved and the safety of the battery is improved on the premise that the actual use effect of the battery is not influenced.

The present disclosure provides systems and methods for enabling transfer of energy from a vehicle. A vehicle configured to provide energy to a building is disclosed. The vehicle may include a transceiver configured to receive a setpoint temperature, historical building load consumption information, and current building load consumption information associated with the building. The vehicle may also include a processor configured to obtain a trigger signal and transmit a command signal for causing activation of a building component to the setpoint temperature in response to obtaining the trigger signal. The processor may also compare the current building load consumption information to the historical building load consumption information in response to activating the building component, and determine a building component load profile based on the comparison and the setpoint temperature. The processor may then control building component operation based on the building component load profile.

The invention provides a plane grating splicing structure and a preparation method thereof, the plane grating splicing structure comprises at least two plane grating modules with a preset structure, and all the plane grating modules are spliced together to form a plane grating with the preset structure; moreover, each plane grating module at least comprises two small gratings, and the small gratings belonging to the same group are spliced together to form the plane grating module with a preset structure. According to the plane grating splicing structure and the grating manufacturing method, the problems that a plane grating manufactured through an existing plane grating manufacturing method is large in manufacturing difficulty, high in equipment cost and prone to damage can be solved.

The LED lamp comprises a base, an LED lamp body is fixedly installed on the right side of the top face of the base, non-slip mats are fixed to the four corners of the bottom face of the base, and an auxiliary mechanism is arranged on the base. The auxiliary mechanism comprises a supporting assembly arranged on the base and an auxiliary assembly arranged on the supporting assembly, and the auxiliary mechanism further comprises a dustproof assembly arranged on the base. The LED lamp used for the table top is provided with the auxiliary mechanism, articles which are not commonly used on the table top can be placed in the storage rack to be stored through the supporting assembly so as to keep the table top clean, meanwhile, mosquito repelling aromatherapy or refreshing aromatherapy can be placed in the storage rack, and due to the fact that the receding hole is formed in the top face of the base, the LED lamp can be conveniently taken out. The aroma can play a role through the receding hole so as to improve the office or study efficiency, the dustproof assembly is arranged, the detachable filter screen is arranged in the receding hole, the dustproof effect can be achieved, and meanwhile the effect of the aroma is not affected.

The utility model relates to the technical field of warp knitting machines, and discloses a defective cloth detection device of a warp knitting machine, which comprises a laser broken yarn monitoring device controlled by a warp knitting machine control cabinet and a light auxiliary device for assisting artificial eye detection, the light auxiliary device comprises a strip-shaped lamp and a lampshade, the strip-shaped lamp is fixedly connected with the lampshade, and the light auxiliary device is connected with the warp knitting machine control cabinet. The lampshade is fixed with the warp knitting machine box body; the lampshade comprises an inclined upper plate, a long-strip-shaped lamp fixing side plate and a horizontal lower plate. The lampshade is of an integrated bent structure. And the inclination angle of the inclined upper plate is 40-60 degrees. The laser broken yarn monitoring device is arranged below the horizontal lower plate and fixed to the warp knitting machine rack. According to the utility model, through combination of automatic laser broken yarn monitoring and artificial eye detection secrecy, the photo-assisted device for assisting artificial eye detection is simple in structure, low in cost and very good in use effect, and the combination of the two can effectively improve the weaving quality, so that the production cost is reduced.

The present invention relates to the technical field of centrifugal fans, and discloses a method for optimizing the parameters of a high-speed three-dimensional flow centrifugal impeller and a centrifugal fan, including: obtaining multiple mechanical parameter groups, constructing a centrifugal fan based on the extracted mechanical parameter groups, calculating loss parameters based on the centrifugal fan, calculating the sound source decibel corresponding to the centrifugal fan, confirming the noise detection environment and starting the centrifugal fan, extracting target detection points in sequence from the noise detection environment, constructing a noise decibel curve using the target detection points, obtaining centrifugal fan data based on the noise decibel curve, summarizing the centrifugal fan data, obtaining a centrifugal fan data set, screening the centrifugal fan data set, obtaining an optimized fan data set, and using the optimized fan data set to confirm the optimal three-dimensional flow centrifugal fan. The main purpose of the present invention is to combine the use scenario of the centrifugal fan, integrate the noise propagation model in the actual use scenario of the centrifugal fan into the simulation experiment of the centrifugal fan, so as to confirm the optimal centrifugal fan parameter group.

The utility model discloses raw material grinding equipment for carbon black masterbatch production, which comprises a stand column, a lifting assembly and a grinding assembly, the first motor is arranged at the upper end of the stand column, the lead screw is arranged at the output end of the first motor and located in the sliding groove, the two lifting plates are arranged outside the lead screw in a threaded mode and are symmetrically arranged, two sections of reverse threads are arranged on the outer wall of the lead screw, and the opposite outer walls of the lifting plates are attached to the inner wall of the sliding groove; the grinding assembly comprises a second motor arranged on the outer side of the upper side lifting plate. According to the raw material grinding equipment for carbon black master batch production, the two lifting plates are driven to get close to each other through the arranged first motor, then the grinding disc and the grinding box are controlled to get close to each other, the grinding disc and the grinding box which get close to each other grind and extrude raw materials, and therefore the situation that grinding particles are different in size during grinding is prevented; and it is guaranteed that ground powder is fine enough, and the using effect is not affected.