71results about How to "Uniform density" patented technology

The invention relates to the technical field of copper rod straightening, in particular to five-wheel continuous casting copper rod straightening equipment which comprises a conveying cylinder composed of a horizontal part and an arc-shaped part. The shaping unit is positioned in the arc-shaped part of the conveying cylinder and is used for carrying out extrusion and refining treatment on the copper rod; the preliminary straightening unit is located in the horizontal part of the conveying cylinder and used for conducting preliminary straightening treatment on the copper rod; the accurate straightening unit is located in the horizontal part of the conveying cylinder and used for conducting accurate straightening treatment on the copper rod subjected to preliminary straightening; by the adoption of the straightening mode, when the copper rod deforms, enough materials exist on the inner side of the copper rod, the copper rod is allowed to deform, cracks generated when the inner side of the copper rod deforms are avoided, the quality of the copper rod is improved, the straightness of the copper rod can be improved through multi-step straightening treatment, the density of different positions on the copper rod is more uniform, and the quality of the copper rod is improved. And subsequent processing is facilitated.

The invention provides a preparation method of an ADC foaming agent for improving foaming pore density, which comprises the following steps: step 1, mixing a modified inorganic nucleating agent with water according to a predetermined mass ratio, adding a dispersing agent, and uniformly mixing to prepare uniform and stable suspension slurry to prevent agglomeration of the nucleating agent; 2, when the conversion rate of the biurea reaches 80%-85%, adding the suspension slurry, so that the inorganic nucleating agent is uniformly attached to the surface of the ADC crystal; and 3, continuing the oxidation reaction until the biurea conversion rate reaches 92% or above, and then washing, centrifuging and drying to obtain the ADC foaming agent. The ADC foaming agent for improving the foaming pore density is prepared by the method. The inorganic nucleating agent is added in the stage of preparing the ADC foaming agent, and compared with the inorganic nucleating agent added in the subsequent foam material preparation process, the density of foaming pores can be remarkably improved.

The utility model relates to the technical field of liquid packaging machine equipment, and discloses a feeding device of a back sealing liquid packaging machine, which comprises a liquid storage tank, the upper side of the liquid storage tank is rotatably connected with a second bevel gear, and the lower side of the second bevel gear downwards penetrates through an upper tank cover of the liquid storage tank and is fixedly connected with a plurality of connecting rods; a plurality of connecting rods are arranged in the liquid storage tank, the lower ends of the plurality of connecting rods are jointly and fixedly connected with a central cylinder, a shaftless auger blade is rotatably connected in the central cylinder, and the upper end of the shaftless auger blade is fixedly connected with a transmission rod. The shaftless auger blade can convey macromolecular substances settled below the liquid storage tank to the upper-layer space of the liquid storage tank along the central cylinder, and the macromolecular substances are mixed with an upper-layer low-density solution, so that the density difference value of the upper-layer solution and the lower-layer solution is reduced, and the densities of the upper-layer solution and the lower-layer solution in the whole liquid storage tank tend to be uniform relatively.

The application discloses a research report generation method based on natural language processing and relates to the technical field of intelligent document analysis and generation, which comprises the following steps: version storage of source documents and generation of timestamp snapshots; paragraph-level and sentence-level segmentation of the timestamp snapshots and extraction of evidence segments carrying original text positioning indexes; core claim extraction of the evidence segments to generate conclusion units containing claim texts and confidence; establishment of the association relationship between the conclusion units and the evidence segments; generation of chapter texts according to the associated conclusion units and calculation of evidence segment coverage; and structural adjustment and regeneration of the texts when the evidence segment coverage is lower than a preset threshold. The method realizes evidence traceability, multi-type semantic association and automatic optimization based on coverage feedback.

This invention relates to the field of coffee machine technology and proposes a coffee machine powder receiving cylinder movement structure, including a housing. A grinding assembly is disposed within the housing, a tamping cylinder assembly is disposed on one side of the grinding assembly, and a receiving cylinder assembly is disposed below the tamping cylinder assembly. A connecting rod fixed shaft movement track is provided between the tamping cylinder assembly and the receiving cylinder assembly. A fixing component is snapped onto one side of the receiving cylinder assembly, and a lead screw assembly is connected to the fixing component. The grinding assembly guides coffee powder into the receiving cylinder assembly. The lead screw assembly drives the fixing component to move, simultaneously driving the receiving cylinder assembly connected to the fixing component to move upward along the connecting rod fixed shaft movement track. The receiving cylinder assembly moves to below the tamping cylinder assembly and engages with it. During this process, the tamping cylinder assembly and the receiving cylinder assembly are concentric and coaxial in the vertical direction. The tamping cylinder assembly applies downward force, cooperating with the receiving cylinder assembly to compress the coffee powder into a uniformly dense coffee cake.

This utility model belongs to the field of evaporator technology and discloses a high heat exchange efficiency microchannel heat exchange structure ice mold evaporator, including an evaporator body. Multiple microchannel heat exchange tubes are fixedly installed on the inner side of the evaporator body, and multiple microchannel holes are opened at the bottom of the evaporator body. Diversion pipes are fixedly installed on the left and right sides of the evaporator body. The comprehensive application of the microchannel heat exchange structure, inner surface strengthening treatment, and outer surface fin design significantly improves the heat exchange efficiency of the evaporator. Compared with traditional evaporators, the ice-making speed can be increased, producing the same amount of ice in a shorter time, meeting the demand for rapid ice making. High heat exchange efficiency means that, under the same ice-making capacity, the required refrigeration compressor running time is shortened, and energy consumption is reduced. Actual testing shows that using the evaporator of this utility model reduces the energy consumption of the ice-making system, effectively reducing operating costs.

A navigation light adjustment method and system are disclosed, relating to the field of navigation light technology. The method involves acquiring vessel information and visibility for all vessels within a predetermined water area; determining the vessel density within the predetermined water area based on the vessel information; dividing the predetermined water area into multiple adjustment zones based on the vessel density; calculating the comprehensive navigation condition value for each vessel within each adjustment zone based on the visibility and vessel density; obtaining the navigation routes for each vessel within each adjustment zone; and adjusting the parameters of the navigation lights for each vessel within each adjustment zone based on the navigation routes and the comprehensive navigation condition value. Implementing the technical solution of this application allows for analysis of the surrounding navigation environment and timely adjustment of navigation lights, thereby reducing the probability of vessel collisions.

According to one embodiment of the present disclosure, a free-standing film for dry electrode, comprising: a binder, an active material and a conductive material, wherein the free-standing film has a tensile strength of 2000 gf / cm2 or more based on a thickness of 200 µm.

This invention relates to the field of building exterior wall construction technology, specifically a construction method for concrete in building exterior wall structures. The device includes a wall body with internal steel reinforcement. Several binding steel bars are arranged in a linear array on the wall reinforcement, and all binding steel bars are inserted into the wall body. A formwork mechanism that restricts the concrete shape and is easily disassembled is located in front of the wall body. The filled concrete is compacted by uniformly moving laterally during vibration, thus avoiding the situation where some concrete is not compacted during manual operation. This ensures uniform compaction of the concrete, further increasing its overall structural strength after setting. While more accurately controlling the concrete compaction, the vibration also removes a large number of air bubbles within the concrete, preventing the formation of numerous voids that could damage the overall structural strength of the exterior wall after setting, and also preventing rainwater infiltration and dampness.

The utility model belongs to the technical field of building new material plate production, and particularly relates to a building new material plate compacting device which comprises an operation table, a supporting table is fixedly connected to the outer wall of the operation table, a compacting mechanism is arranged on the supporting table, a demolding mechanism is arranged below the compacting mechanism, and the demolding mechanism comprises a frame body. And a long plate and a short plate are arranged in the frame body. According to the new building material plate compacting device, after a plate is formed, a hydraulic cylinder b is controlled to drive a long plate and a short plate to return to original positions, so that the plate is preliminarily separated from the inner walls of the long plate and the short plate, then a hydraulic cylinder c is controlled, and at the moment, a material ejecting plate fixed to the output end of the hydraulic cylinder c can eject the formed plate out of a frame body; by means of the design, the demolding process is smoother, the plate is directly ejected out of the frame body through the ejector plate, an operator can conveniently, rapidly and conveniently take materials, the production efficiency is greatly improved, and the labor intensity is reduced.

The invention relates to a signal sorting method and device based on a tree diagram, and computer equipment, and the method comprises the steps: determining a father-child node relation between pulse data points based on the local density of a pulse signal and the distance measurement of a nearest pulse with a larger local density, thereby constructing a tree diagram, obtaining a clustering center in a self-adaptive manner, and carrying out the self-adaptive clustering of the clustering center; and then distribution of residual pulse data points is carried out, so that automatic clustering and sorting of pulse signals are realized. According to the method, the clustering center can be adaptively estimated, the method is suitable for any cluster shape, non-uniform-density pulse signal sorting is effectively achieved, and the sorting performance is superior to that of an existing method.

The utility model relates to the technical field of bending limiter molds, and provides a submarine cable bending limiter pouring mold which comprises a mold body, a cover plate, a vibration device and a state detection sensor. The mold body is provided with a pouring cavity and a pouring opening communicated with the pouring cavity, the pouring opening is formed in the top of the mold body, and the pouring opening is used for injecting raw materials and exhausting during pouring; the mold body is connected with the vibration device, so that when the vibration device vibrates, the mold body is driven to vibrate, and bubbles in raw materials are discharged; the state detection sensor is installed on the mold body and located on the upper side of the sprue gate, and the state detection sensor is used for detecting the solidification state of raw materials in the mold body; and when the state detection sensor detects that the raw materials are in the preset solidification state, the cover plate covers the sprue gate of the mold body. According to the utility model, not only is the density uniformity of the cast submarine cable bending limiter ensured, but also the production efficiency and the product quality of the submarine cable bending limiter are improved.

The invention discloses premixed polyether polyol for continuous production of LNG (liquefied natural gas), polyurethane foam and a preparation method of the premixed polyether polyol. The premixed polyether polyol comprises the following raw materials in parts by weight: 80-105 parts of composite polyol; 3-5 parts of a nano reinforcing agent; 2-4 parts of a composite catalyst; 2-4 parts of a foam stabilizer; 20-30 parts of a physical foaming agent; 1.0-2.0 parts of a chemical foaming agent; and 20-30 parts of a flame retardant. The polyurethane foam comprises the combined polyether and polymerized diphenylmethane diisocyanate, and is prepared by mixing the combined polyether and the polymerized diphenylmethane diisocyanate according to a certain proportion. According to the low-temperature-resistant, low-thermal-conductivity and high-strength polyurethane foam for the LNG, the combined polyether reacts with the isocyanate, and through the synergistic effect of the high-functionality polyether polyol, the polyester polyol and the nano reinforcing agent, the low-temperature-resistant, low-thermal-conductivity and high-strength polyurethane foam for the LNG can be continuously produced; the density is uniform; the heat conductivity coefficient is low; and the strength is high.

This invention discloses a waste recycling device for FIBC (Flexible Intermediate Bulk Container) processing, relating to the field of comprehensive environmental utilization of solid waste. The device includes a hollow frame, a hydraulic rod mounted on the hollow frame, and a pressure plate mounted on the hydraulic rod. The equipment continuously feeds FIBC waste into a flattening machine. The pressure plate is automatically triggered by the weight of the waste, achieving a complete automatic cycle of feeding, weighting, triggering, compaction, resetting, and locking, thus improving waste recycling efficiency. When not in operation, the pressure plate is rigidly limited by a limiting mechanism, preventing hydraulic system depressurization or accidental drop. This ensures uniform compaction density of the plastic waste, reducing the mixing and adhesion of plastic and impurities due to insufficient compaction, facilitating subsequent separation of plastic from other components. It also protects core components such as the hydraulic rod and pressure plate, extending equipment lifespan, reducing maintenance costs, and contributing to the resource-based recycling of plastic waste and comprehensive utilization of solid waste.

This application provides a gradient-doped ferroelectric thin film device and its fabrication method, relating to the field of optoelectronic device technology. The gradient-doped ferroelectric thin film device comprises, from bottom to top, a substrate, a buried oxide layer, a buffer layer, and a ferroelectric thin film material layer; the ferroelectric thin film material layer is doped with impurity ions, with the doping concentration of the impurity ions increasing sequentially from bottom to top. This application, by employing a bottom-up incremental gradient doping design, optimizes the interface defects and internal stress of the ferroelectric thin film, overcomes the problem of lattice mismatch between ordinary ferroelectric thin films and the substrate layer, achieves improved crystal quality and enhanced electro-optic coefficient, and effectively improves the electro-optic effect.

The utility model discloses waterfowl shell compression molding equipment, and particularly relates to the technical field of waterfowl shell molding equipment.The waterfowl shell compression molding equipment comprises a main frame, a compression assembly, a mold assembly and a controller, the main frame comprises a top frame, a bottom frame and two side plates, and two first positioning clamping plates are installed on the bottom face of the top frame in a sliding mode; two second positioning clamping plates are installed on the top face of the bottom frame in a sliding mode, the pressing assembly comprises two arc-shaped pressing plates, a plurality of air cylinders are evenly arranged on the two side plates correspondingly, and the telescopic ends of the air cylinders are fixedly connected with the two arc-shaped pressing plates correspondingly; a plurality of electric heating bars and a temperature detector are arranged in each arc-shaped pressing plate in a penetrating mode, the opposite surfaces of the two arc-shaped pressing plates are matched with the outer wall of the mold assembly, and an injection port and an exhaust port are formed in the top of the mold assembly. According to the utility model, the die is vertically placed, so that the good exhaust effect can be ensured, the product quality is improved, and the density of the pressed waterfowl shell is relatively uniform.

The utility model relates to waterproof volume production technical field, and disclose a kind of winding and packing device for waterproof volume, it include: rack, rack is also rotationally connected for winding winding roller;Arrangement structure, arrangement structure includes frame, extruding roller, silk cover, screw rod and servo motor, extruding roller is rotationally connected with frame, silk cover is installed at the bottom of frame, screw rod is threadedly connected with silk cover, screw rod is driven by servo motor, frame can push extruding roller close winding roller and extrude volume, extruding roller is driven by servo motor-screw rod mechanism, and cooperate pressure sensor feedback, can realize the pressure that constant or according to preset curve changes is applied to volume, no matter how increase, system can automatically adjust extruding roller position, keep stable compaction effect, to ensure that from roll core to roll outer density uniform, effectively avoid traditional winding's inner loose outer tight phenomenon, volume stiff, facilitate transportation and storage.

The present application relates to a kind of flame-retardant anti-shrinkage PBAT / bamboo powder supercritical foaming material and its preparation method, belong to degradable foaming material technical field.To solve the problem that PBAT system introduces bamboo powder and flame retardant causes foaming material cell structure uneven, density uneven, mechanical property drops, the present application provides a kind of flame-retardant anti-shrinkage PBAT / bamboo powder supercritical foaming material, component includes PBAT, bamboo powder and flame retardant, melt extrusion granulation after being placed in airtight container, fills in supercritical gas and is foamed to be prepared.The present application improves the anti-shrinkage and flame-retardant performance of PBAT foaming material by the addition of bamboo powder and flame retardant;By optimizing the injection amount of supercritical gas, foaming temperature and pressure, reduce foaming instability, effectively offset the adverse effects of bamboo powder and flame retardant on cell growth, obtain uniform cell structure and density, further improve the mechanical property of material.

This invention discloses a control method and system for a high-temperature coating furnace for pyrolytic graphite, belonging to the field of material preparation and high-temperature heat treatment technology. It solves the problems of poor deposition uniformity, contradiction between deposition efficiency and quality, and poor process repeatability that exist in coating furnace control methods when preparing workpieces. The technical solution includes the following steps: The substrate to be deposited is placed in the furnace chamber of the high-temperature coating furnace for pyrolytic graphite and pretreated; the pretreated substrate is subjected to multi-stage variable temperature and flow rate deposition control to complete the deposition operation. The multi-stage variable temperature and flow rate deposition control includes four sub-stages performed sequentially: preheating and degassing, interface nucleation, stable growth, and final densification; after the deposition operation is completed, the substrate is cooled, and the substrate coated with pyrolytic graphite is removed. This invention is applied to coating furnaces.

The invention provides a pressurizing device and method for a cylindrical solid-state battery and the cylindrical solid-state battery, and belongs to the technical field of new energy battery manufacturing, and the pressurizing device comprises a rack, a central pipe, an internal pressurizing assembly and an external pressurizing assembly; the rack is used for bearing a cylindrical battery, and the central pipe serves as a supporting reel in the cylindrical battery roll core winding process and can generate radial preset deformation; the internal pressurizing assembly is connected to the rack, telescopically extends into the central pipe and is used for applying radial pressure to the pipe wall of the central pipe and driving the central pipe to generate first radial pressure on a roll core of the cylindrical battery; the external pressurizing assembly is connected with the rack and is used for applying radial pressure to the shell of the cylindrical battery and driving the shell to apply second radial pressure to the roll core; therefore, the roll core of the cylindrical battery is subjected to internal and external double extrusion, so that the roll core can form uniform and stable high pressure among the diaphragms, thereby improving the rate capability and the cycle stability of the cylindrical battery and prolonging the service life of the cylindrical battery.

The utility model provides a kind of pasture high -efficient bundling and automatic net winding machine, it is related to pasture bundling technical field, including: pasture bundling machine, pasture bundling machine right side end is equipped with net winding frame, pasture bundling machine upper end surface is equipped with feeding port, feeding port left upper end is equipped with conveyer belt, conveyer belt left upper end is provided with pretreatment bin, microwave moisture sensor is installed in the pretreatment bin inboard, pretreatment bin is provided with positive and negative conveyer belt, conveyer belt one and conveyer belt two in, conveyer belt one and conveyer belt two are symmetrically distributed and located at the lower end of positive and negative conveyer belt, the inboard of pretreatment bin is provided with electric dryer and sprinkler plate, the lower plate of sprinkler plate is provided with mist sprayer. The utility model solves the problem that pasture can be dried when it is too wet in the prior art, and it is easy to produce dust and poor compression bundling effect when it is too dry.

This invention discloses a hot isostatic pressing densification method for impregnated coating of ball valve cores, belonging to the field of metal surface coating technology. The method specifically includes the following steps: (1) substrate pretreatment and coating preparation; (2) activation of the coating's thermoplastic state; (3) encapsulation-type near-isostatic pressing densification treatment; and (4) unloading, cooling, and finishing. The core of this invention lies in the synergistic effect of "thermoplastic softening" and "uniform pressure application with full spherical encapsulation." By applying a uniform pressure of approximately isostatic pressure to the coating in its thermoplastic state, the internal pores are efficiently closed, improving the coating's density and overall mechanical properties without damaging the coating's integrity or the workpiece's geometric accuracy.

This utility model discloses a magnetic material processing and forming device, relating to the field of soft magnetic material processing technology. It includes a base, a stationary groove mold, a moving groove mold, a first driving device, and a second driving device. The stationary groove mold is fixed to the base, and a push plate is provided at the groove notch. The moving groove mold is slidably mounted on a linear slide rail on the base. The first driving device drives the moving groove mold to close with the stationary groove mold, at which point the groove bottom plate, the two groove notches, and the push plate together form a pressing groove. The second driving device drives the punch to press the protrusion into the pressing groove to complete the forming. During demolding, the moving groove mold separates and drives the push plate to automatically eject the blank. This device achieves rapid mold closing and demolding through the sliding cooperation of the moving and stationary groove molds, resulting in a simple structure and efficient operation. The device automatically ejects the blank through the sliding separation of the moving and stationary groove molds and the linkage of the push plate, eliminating the need for a separate ejection mechanism, reducing the failure rate, reducing the number of parts, and ensuring uniform pressing density of the blank.

This invention is primarily applicable to the field of embroidery machine technology. It discloses a method, device, equipment, and medium for feedforward control of yarn tension in an embroidery machine. The method involves acquiring data of the pattern to be embroidered within a look-ahead buffer; detecting the needle pattern switching point between the current and next needle steps; determining the theoretical thread consumption rate mutation value based on the needle step length and spindle speed; generating a compensation pulse command accordingly, the execution time parameter of which is synchronized with the spindle phase at the start of the next needle step; and controlling an electromagnetic direct-drive high-speed response actuator to perform active compensation within a preset window when the spindle reaches this phase, thus mitigating the transient impact of the thread consumption rate mutation on the yarn tension. This application achieves feedforward-feedback composite high-dynamic control of yarn tension during needle pattern switching transients, eliminating thread breakage and slippage, and ensuring stitch consistency in the transition area.

This invention relates to a method for preparing superconducting targets using reaction sintering. The invention provides three reaction sintering processes for preparing superconducting targets, which can rapidly advance densification at ambient pressure and lower peak temperatures, avoiding the problems of excessive precipitation of Ba / Cu-rich liquid phase and insufficient densification caused by high temperature or high pressure. This achieves the preparation of high-density superconducting targets without Ba / Cu liquid phase precipitation and volatilization, and less prone to cracking, thereby improving the critical current density and other properties of the superconducting targets. Specifically, the low-temperature synthesis-pulverization process can prepare targets with higher density and better critical current density and other properties; the low-temperature synthesis-jaw crushing process can prepare high-density targets with a higher yield, better supporting mass production; and the low-temperature negative pressure synthesis-pressureless sintering process balances high density and yield, while eliminating high-pressure tooling, simplifying the sintering process, and reducing equipment wear.

The utility model discloses an extrusion device convenient for uniform stress, which belongs to the technical field of plate extrusion, and comprises a placing plate, four corners of the placing plate are respectively and fixedly connected with a first electric push rod, the top of each first electric push rod is fixedly connected with a connecting block, and a linkage plate is fixedly connected among the four connecting blocks. According to the extrusion device facilitating uniform stress, a first electric push rod can be started to drive a connecting block and a linkage plate to press downwards, at the moment, the linkage plate can push a telescopic rod, a buffer spring and an extrusion plate at the bottom to extrude an integrated wallboard, and at the moment, the extrusion plate can extrude the telescopic rod and the buffer spring; the force applied by the extrusion plate to the integrated wallboard is uniformly distributed under the elastic action of the buffer spring, and the situation that local stress of the wallboard is too large or too small in the extrusion process is avoided, so that it is guaranteed that the density and strength of the wallboard are uniform and consistent, and the product quality is improved.

The invention discloses a method for preparing solid waste integrated self-cleaning-light storage ceramic from epoxy resin, which comprises the following steps: adding a dispersing agent and epoxy resin into deionized water in a ball milling tank A to prepare a premixed solution, adding light storage powder, self-cleaning powder and a first part of glass powder, and placing on a ball mill for ball milling; preparing a premixed solution in a ball milling tank B, adding fly ash and a second part of glass powder, and placing on a ball mill for ball milling; adding a curing agent into the slurry subjected to ball milling in the ball milling tank A, and carrying out ball milling again to obtain mixed slurry a, adding a curing agent into the slurry subjected to ball milling in the ball milling tank B, and carrying out ball milling again to obtain mixed slurry b; performing vacuum defoaming on the mixed slurry b, injecting the mixed slurry b into a mold, performing vacuum defoaming on the ball-milled mixed slurry a after the surface is slightly solidified, and injecting the ball-milled mixed slurry a into the mold to obtain a gel wet blank; putting the gel wet blank and the mold into a constant-temperature and constant-humidity box, and curing to obtain a biscuit; the solid waste integrated self-cleaning-light-storing ceramic is prepared from epoxy resin after being placed in a furnace to be degummed and sintered, a substrate is made of solid waste materials, and the production cost is reduced.

The invention discloses a preparation device for a PU material foaming piece of vehicle-mounted refrigerator heat preservation cotton, and belongs to the technical field of vehicle-mounted refrigerator heat preservation cotton preparation. The preparation device comprises a supporting table, and a mixing mechanism and a mold closing mechanism are arranged on the upper surface of the supporting table; according to the device, the mixing mechanism is arranged, a fixing sleeve can be driven to synchronously rotate along with rotation of a spiral column, at the moment, the fixing sleeve drives a rotating rod to do circular motion, the rotating rod can drive a transmission gear to move in an inner gear ring, and the transmission gear drives the rotating rod to rotate under the action of the inner gear ring; at the moment, the rotating rod drives the stirring rod to perform circular motion and autorotation in the mixing barrel, so that polyether polyol and isocyanate in the mixing barrel are stirred and mixed, the defects of air holes and hollowing in a foaming piece are effectively avoided, the fluidity of raw materials is improved, impurities and water are removed, sufficient foaming reaction is ensured, and meanwhile, the density uniformity of the foaming piece is also ensured; and the heat preservation performance of the heat preservation cotton for the vehicle-mounted refrigerator is greatly improved.

The application belongs to the technical field of polyurethane elastomers, and particularly relates to a fluorine-containing polyurethane elastomer for harsh environments and a preparation method thereof. The elastomer is prepared by adding a chain extender to a fluorine-containing polyurethane prepolymer prepared from a fluorine-containing polyether polyol or a mixture of the fluorine-containing polyether polyol and a non-fluorine-containing polyether polyol and diisocyanate, and then vulcanizing after curing. The preparation method of the fluorine-containing polyether polyol comprises the following steps: polymerizing fluorine-containing phenolic compounds and INOVOL C304 as a composite initiator with propylene oxide under the action of a DMC catalyst to obtain the fluorine-containing polyether polyol; and the fluorine-containing phenolic compounds are one of 3,4,5-trifluorophenol, pentafluorophenol or heptafluoro-2-naphthol. The fluorine-containing polyurethane elastomer has excellent high-temperature resistance, hydrolysis resistance and chemical resistance; and the preparation method is simple and easy to implement, and is suitable for large-scale production.