53 results about "Apparent viscosity" patented technology

The invention relates to the field of pharmaceutical engineering and automatic control, in particular to a reaction kettle for synthesizing a medical intermediate and an intelligent control method of the reaction kettle. The reaction kettle comprises a reaction kettle main body, a stirring assembly integrated with a dynamic torque sensor and a thermotechnical pipeline assembly, the system firstly executes no-load calibration to draw a mechanical friction loss curve and a heat transfer coefficient map; deducting friction reference inversion apparent viscosity by using real-time torque during operation, and judging a reaction stage in combination with a reaction heat rate; then dynamic heat balance control is executed, and a medium temperature change compensation strategy or a rotating speed shearing strategy is selected to be executed according to the heat transfer deviation; the method is characterized in that high-precision viscosity inversion is achieved by eliminating mechanical friction interference, the polymerization degree or the crystallization state is visually monitored on the premise that the closed environment is not damaged, and the problem that the reaction process is invisible in the prior art is solved.

Embodiments of the present disclosure generally relate to apparatus and methods for foam generation, and to apparatus and methods for evaluation of foam systems. In an embodiment, a method of analyzing foam properties includes delivering a foaming composition and a gas to a housing at a pressure of 500 psi to 6,000 psi and a temperature of 35° C. to 150° C., the housing containing an unconsolidated porous media. The method further includes flowing the foaming composition and the gas through the housing, and forming a foam by an interaction of the foaming composition, the gas, and the unconsolidated porous media. The method further includes directing the foam from the housing to a visualization chamber, the visualization chamber in fluid communication with the housing, and measuring a foam characteristic via the visualization chamber. The characteristic may include foam half-life, pressure drop through the unconsolidated media, and / or apparent viscosity of the foam.

The invention relates to the technical field of sludge resource utilization, and discloses a sludge alginate recovery control system and method based on reinforcement of traditional Chinese medicine leach liquor, and the system comprises a biological reaction unit, a sensing monitoring and feedback network, a precise adding execution unit and a central control unit. The method comprises the following steps: calibrating a reference oxygen consumption rate by measuring a dissolved oxygen decline slope; executing tentative induction, judging the sludge sensitivity according to the descending and rising characteristic waveforms of the oxygen consumption rate, and implementing pulse addition; the change of the stirring torque is monitored in real time, a high-shear stripping action is triggered in an apparent viscosity increasing plateau stage, and the mass transfer resistance of a gel layer is eliminated; and the reaction endpoint is locked by combining the oxygen consumption rate ratio falling and the oxidation-reduction potential mutation. According to the method, accurate adding of the inducer is achieved through respiratory dynamics feedback, a solid-liquid interface is updated through rheological driving shearing, the problems that mass transfer is limited and end point judgment is delayed due to product wrapping are solved, and the recovery efficiency of the alginate-like salt is improved.

The application discloses a kind of based on three-dimensional phase diagram straight writing line topography regulation and control method, device, equipment and medium, it is related to printing technical field, comprising: by obtaining the rheological test result of different viscosity ink, printing process parameters and line form characterization data, apparent viscosity and boundary parameter are obtained by integration and power law fitting, construct with normalized height, normalized velocity, apparent viscosity as three-dimensional dimension process phase diagram, then by matching adaptive parameter or ink rheological property obtains target form.This introduces apparent viscosity as the third dimension, optimizes the limitation that two-dimensional phase diagram only adapts specific viscosity ink, quantifies the correlation of process parameters, rheological property and line form, only three core parameters can realize cross-ink system form accurate prediction and regulation, compatible with multiple viscosity inks, significantly reduce parameter optimization time consumption, avoid experience trial and error, accurately identify material process window, provide quantitative target for ink formula optimization, improve printing process adaptability.

This invention discloses a multi-dimensional blending method for heating lubricating oil. The method first initializes data such as the viscosity-temperature characteristic curve of the base oil, the dissolution activation energy of additives, and the thermal degradation threshold. Then, it constructs a multi-dimensional coupled model encompassing temperature, rheology, and time dimensions. The main heating unit maintains the base oil's basic flow temperature and performs low-speed pre-blending. During additive injection, an auxiliary heating unit rapidly heats the local fluid at the instantaneous optimal dissolution temperature calculated by the model. Apparent viscosity is calculated based on mixing torque feedback. Shear rate and heating power are dynamically adjusted according to the blending efficiency function. The blending endpoint is determined using a "viscosity-energy consumption" feedback loop, and parameters are optimized through an adaptive learning module. This method achieves efficient dispersion, energy saving, low thermal damage, and improves product mixing uniformity and batch quality stability.

The invention discloses a fluxing agent for replacing fluorite in iron and steel smelting and a manufacturing method thereof, and belongs to the field of iron and steel smelting. The fluxing agent for replacing fluorite is prepared by taking nepheline syenite containing various silicate minerals as a main material, crushing, adding a mixture taking bentonite and starch as a binder, adding water, uniformly mixing, then pressing into pellets with the diameter of 30-40mm by a machine, and airing and drying for use. Wherein the binder accounts for 3-5% by weight, is the same as fluorite, has the effects of reducing the melting point and apparent viscosity of the slag, improving the fluidity of the slag and reducing the iron loss of the slag, and can increase the alkalinity of molten steel and improve the quality of the molten steel. The ingredients overcome the defects of fluorite in iron and steel smelting, corrosion to a furnace lining of a melting furnace can be reduced, the health of workers is not harmed, pollution of slag to the environment can be reduced, and the post-treatment process of the slag is simplified, so that the treatment cost of the slag is reduced.

The application provides a method for identifying micro-aggregate structure in a heavy oil molecule simulation trajectory, which comprises the following steps: analyzing a molecular dynamics trajectory, identifying aromatic ring structures in heavy oil molecular components and calculating geometric centers of the aromatic ring structures, combining periodic boundary conditions, and applying an improved DBSCAN clustering algorithm to realize automatic identification and clustering of the aggregates; the clustering results are post-processed and optimized, the final aggregate set is generated after merging and sharing clusters, and the number, size distribution, morphological characteristics and dynamic evolution information of the aggregates are analyzed based on the structural characteristics of the aggregates. The method can accurately capture the pi-pi stacking behavior of heavy oil molecules, and further reveal the morphological characteristics, dynamic evolution law of heavy oil micro-aggregates and the influence of the micro-aggregates on the apparent viscosity of heavy oil, thereby providing theoretical support for the analysis of the viscosity-causing mechanism of heavy oil and the design of viscosity reducers, and complementing experimental research, and promoting the efficient development and green utilization of complex heavy oil systems.

The invention discloses a three-dimensional phase diagram-based straight writing line morphology regulation and control method, device, equipment and medium, and relates to the technical field of printing, and the method comprises the steps: obtaining the rheological test results of inks with different viscosities, printing process parameters and line morphology representation data, and carrying out integration and power law fitting to obtain apparent viscosity and boundary parameters; a process phase diagram with normalization height, normalization speed and apparent viscosity as three dimensions is constructed, and a target form is obtained by matching adaptive parameters or ink rheological characteristics. In this way, apparent viscosity is introduced as a third dimension, the limitation that a two-dimensional phase diagram is only adapted to ink with specific viscosity is optimized, correlation among technological parameters, rheological properties and line forms is quantified, accurate prediction and regulation of the form of a cross-ink system can be achieved only through three core parameters, the method is compatible with ink with various viscosities, time consumed for parameter optimization is remarkably shortened, and the method is suitable for large-scale popularization and application. And experience trial and error are avoided, a material process window is accurately identified, a quantitative target is provided for ink formula optimization, and the adaptability of a printing process is improved.

This invention discloses a method for determining the drag reduction performance of a superhydrophilic coating, comprising the following steps: setting multiple different preset shear rates; setting multiple preset time periods; setting a preset spraying thickness of the superhydrophilic coating to be tested; obtaining multiple apparent viscosity benchmark values ​​of the oil sample under each preset shear rate; spraying the superhydrophilic coating of the preset spraying thickness onto the coaxial cylindrical rotor of a coaxial cylindrical viscometer, and generating a water ring on the surface of the superhydrophilic coating; obtaining multiple apparent viscosity comparison values ​​at each preset shear rate, measured by the coaxial cylindrical viscometer after being kept at a constant temperature for multiple preset time periods; for each preset shear rate, based on the comparison results of the apparent viscosity benchmark value and each apparent viscosity comparison value, determining the drag reduction performance and stability evaluation results of the superhydrophilic coating for the oil sample under that preset shear rate. This invention can effectively determine the drag reduction performance and stability of superhydrophilic coatings.

The application discloses a high-density composite fluid regulation method for pumped storage system, comprising: based on basic data, establishing system target function and constraint library containing machine stability index and shear-sedimentation coupling stability window constraint; generating time-varying three-control dynamic operation envelope according to unit and pipe network parameter library; receiving sensor data stream, analyzing combined characteristics such as machine side current harmonic and main loop pressure pulsation, and obtaining state vector containing apparent viscosity, density and other parameters through non-invasive online estimation; under the constraint of dynamic operation envelope, reverse optimization is carried out to generate joint schedule containing unit operation trajectory and fluid property target trajectory. The application puts fluid properties into active regulation category, realizes collaborative optimization of high-density energy storage medium and conversion equipment, and improves the economy, safety and dynamic response ability to power grid demand of system operation.

Provided are a sealing device capable of achieving both low torque and high sealability by improving grease applied to a seal lip and a mating member thereof, and a rotating component using the sealing device. A seal ring 14 is fixed to a fixed-side member 2 of a rotating component, is in sliding contact with a rotating-side member 15, and has a seal lip in sliding contact with the rotating-side member 15, grease being applied to a sliding contact surface of the seal lip, in which the grease contains a base oil, a thickener, and an additive, and an apparent viscosity of the grease at a shear rate of 1000 s-1 at 60°C is 0.22 Pa·s or more.

The invention discloses a circular flow method for normal-temperature conveying of thick oil through a horizontal circular pipe, and relates to normal-temperature conveying of the thick oil in a wide flow ratio by using dimethyl silicone oil and poly-alpha olefin oil as fluid for isolating the thick oil. The dimethyl silicone oil and the poly-alpha olefin oil are used as circulation media, the difference between the apparent viscosity of the circulation media and the thick oil at 25 DEG C and 5 s <-1 > is 50-300 times, the kinematic viscosity of the circulation media and the thick oil at the temperature of-20 DEG C is 500-3000 cSt, the pipeline temperature is the normal temperature of 25 + / -5 DEG C, and the wide flow ratio is that the volume flow ratio range of the thick oil and the circulation media is 0.5-4.0. According to the circulation flowing method for conveying the thick oil at the normal temperature through the horizontal circular pipe, stable circulation flowing can be formed in the hydrophilic circular pipe and the lipophilic circular pipe with the horizontal smooth inner wall through a simple device, the thick oil is prevented from adhering to the wall, and the flowing method which is low in energy consumption, not prone to instability and easy to separate subsequently is provided for long-distance pipeline conveying of the thick oil at the natural environment temperature.

The present application relates to the technical field of water-based fracturing fluid, and is a kind of water phase suspension fracturing fluid and its preparation method, the water phase suspension fracturing fluid is prepared by using modified polyacrylamide as raw material, and then compounding cleanup agent, xanthan gum, suspending agent, organic matter and high mineralization water, which has high viscosity under high salinity.At the same time, the broken glue solution is obtained by adding the broken glue agent to the water phase suspension fracturing fluid, the broken glue time of the broken glue solution is less than 3h, the apparent viscosity of the broken glue solution is less than 5mPa·s, the surface tension of the broken glue solution is less than 28mN / m, and the interfacial tension between the broken glue solution and kerosene is less than 2mN / m, which all meet the requirements of industry standards, greatly improving the fracturing construction progress and effect.

The application discloses a low-temperature curing resin system suitable for heavy weight impregnation, a preparation method and application, relates to the field of composite materials, and raw materials of the low-temperature curing resin system include 50-70 parts of a first epoxy resin, 15-30 parts of an epoxy modified block polymer containing CTBN, 3-7 parts of a thickening agent, 1-3 parts of a defoaming agent and 6-21 parts of a curing agent in terms of weight percentage. The low-temperature curing resin system provided in the application is in a liquid state with low viscosity under room temperature conditions, can well impregnate heavy weight reinforcing materials under low-temperature conditions, can occur chelation reaction in the later standing process, can increase molecular chains, can increase apparent viscosity of the resin, can reach the resin viscosity for prepreg, can increase toughness of the resin system, and has good operability. The prepreg can be cured under a medium-low temperature environment (75-105 DEG C).

The application provides a kind of liquid food straw sucking difficulty prediction method based on rheological test, the characteristic flow curve of liquid food sample is measured by steady flow test, respectively Carreau-Yasuda model or Casson model (if it is yield type fluid) fitting is carried out, and the predicted flow Q of straw is calculated c , then Herschel-Bulkley model fitting is carried out, and the consistency index K h , power law index n, Herschel-Bulkley yield stress τ h (if it is yield type fluid) is obtained.According to the equation of pipe flow flow, τ R Is calculated and substituted into Herschel-Bulkley model, and the apparent viscosity corresponding to shear rate is obtained, then the prediction model is constructed to predict the liquid food straw sucking difficulty, replace the traditional sensory evaluation method, and provide new ideas for food enterprise research and development decision.

This invention discloses an automatic control system and method for monitoring the viscosity of chemically synthesized hot melt adhesives, relating to the field of viscosity monitoring technology for chemically synthesized hot melt adhesives. The system includes: an online viscosity monitoring module that can be directly embedded in the hot melt adhesive synthesis reaction system for real-time acquisition of apparent viscosity data, reaction temperature data, and shear rate data of the hot melt adhesive during the synthesis process; a data processing module for receiving real-time data acquired by the online viscosity monitoring module, performing noise reduction, calibration, and fitting processing on the data, comparing it to a preset hot melt adhesive viscosity standard threshold, and generating a corresponding control command if the threshold is exceeded; an automatic control module for responding to the control commands generated by the data processing module; and a control module. This invention enables real-time, accurate online monitoring and, based on the monitoring data, completes automated and intelligent viscosity control, improving the quality consistency of hot melt adhesive products and enhancing industrial production efficiency.

The application discloses a continuous slicing method for PTA device oxidation residues for resource recycling, and belongs to the field of PTA devices. The application solves the problems of low production efficiency, poor slice quality, low extraction recovery rate and serious drum surface residue in the prior art. In the application, the liquid oxidation residues are on-line temperature-adjusted to an apparent viscosity of 800-1500 mPa·s, mixed with 0.5%-2.0% crystal seed additives, coated on the surface of a cooling drum with a thickness of 0.5-2.0 mm, and gradient solidified to form a residue thin layer with a micro-crack network inside, the slice is peeled off by using a 1000-5000 Hz high-frequency vibration scraper combined with an atomization isolation technology, and after screening to obtain 2-10 mm regular slices, solvent extraction is carried out to recover organic acid and cobalt-manganese catalyst. The application realizes full-continuous automatic production and has significant economic and environmental benefits.

The invention belongs to the field of inorganic-organic composite carrier materials, and provides an attapulgite-chitosan oligosaccharide composite carrier and a preparation method thereof. According to the invention, gamma-glycidyl ether oxypropyl trimethoxy silane is subjected to hydrolytic polycondensation to form a silane coupling layer on the surface of attapulgite, and chitosan oligosaccharide is covalently grafted through an epoxy group ring-opening reaction to construct a design of a double-layer covalent connection shell layer; according to the preparation method, accurate regulation and control of the shell thickness of 2-30nm under the condition that the mass ratio of chitosan oligosaccharide is 0.05-0.40 are realized, the particle size D50 is controllable in a range of 0.20-2.00 m, the apparent viscosity of 20wt% slurry is 50-500mPa. S, the PDI of powder after spray drying is reduced to 0.05-0.35, the water content is controlled to be 0-8wt%, and the particle size D50 is controllable in a range of 0.20-2.00 m. The coupling contradiction that an existing attapulgite carrier is difficult to consider high-proportion stable introduction of chitosan oligosaccharide, low-viscosity spray processing, particle size PDI degradation, moisture absorption and caking and the like is solved, and the attapulgite carrier has wide application value in the fields of pesticides, food additives, bioactive substance controlled-release carriers and the like.

The application discloses a soil dispersing agent for shield construction and a preparation method thereof. The soil dispersing agent is composed of a compound A and sulfonated succinic acid di-zinc ester sodium. The structural formula of the compound A is shown in the description. The soil dispersing agent is prepared by compounding two components. One is a non-polar hydrophilic group with negative charge, and the other is an oleophilic carbon hydrogen chain. The soil dispersing agent can promote wetting modification, reduce interfacial tension and enhance electrostatic force, improve the space steric hindrance effect, reduce apparent viscosity and improve dispersing effect.

The application provides organic soil and a preparation method and application thereof. The preparation method of the organic soil comprises the following steps: modifying bentonite by surface activation with a strong oxidizing solution to obtain a first reaction intermediate; performing a first contact reaction of the first reaction intermediate and a silane coupling agent containing long-chain alkyl in an alkaline water-alcohol mixed solution to obtain a second reaction intermediate; wherein the long-chain alkyl contained in the silane coupling agent containing long-chain alkyl is C3+ alkyl; and performing a second contact reaction of the second reaction intermediate and a quaternary ammonium salt surfactant to obtain the organic soil. The organic soil has excellent stability in a super-high-temperature environment of a deep well or an ultra-deep well, can effectively improve the structural force, apparent viscosity, dynamic shear force and low shear rate viscosity of a water-in-oil emulsified drilling fluid system, and can improve the rheological stability and sedimentation stability of the water-in-oil emulsified drilling fluid system under a super-high-temperature condition.

The application discloses a polymer melt viscosity correction method and device based on a variable-diameter capillary flow channel, and comprises a layout device, wherein polymer melt is uniformly and continuously fed into the device, an inlet pressure P1 and an outlet pressure P2 of a measuring channel are measured by a sensing assembly, and an inlet-outlet pressure difference is calculated after the outlet pressure is corrected; a shear stress τ borne by the material at the pipe wall is calculated by the inlet-outlet pressure difference w and an apparent shear rate changes the average flow rate of the polymer melt and the inlet inner diameter of the measuring channel, a relationship curve obtained by repeated measurement is obtained, so that the real shear rate of the polymer melt at the pipe wall is obtained, and the apparent viscosity of the polymer melt is obtained as the ratio of the shear stress τ w of the pipe wall and the shear rate. The application expands the apparent viscosity measurement function to the variable-diameter structure channel, realizes the measurement and correction of the polymer viscosity in the flow channel with an inclination angle, is convenient and practical, simple in method, stronger in universality, and higher in measurement precision.

The invention relates to the technical field of preparation of layered products, and discloses a PVDF (polyvinylidene fluoride) film and metal substrate high-temperature melting and laminating process which comprises the following steps: preheating a metal substrate to enable the surface temperature of the metal substrate to be above the melting point of a film material, guiding the normal-temperature film material to cut into a nip point of a pressing and laminating roller at a tiny offset included angle to form a transverse exhaust wave, a transverse shear field is introduced on an interface by adjusting the speed ratio of a pressing roller to the substrate, melt is driven to fill micropores in the surface of the substrate, and the speed ratio is adjusted according to motor current load deviation; keeping the complex at a constant temperature near the crystallization temperature to induce in-situ relaxation of an interface chain segment; according to the method, the apparent viscosity of the melt is reduced by utilizing an interface shear field, a microporous air plug is eliminated, and a crystallization buffer layer with modulus in gradient distribution is constructed between heterogeneous materials, so that essential transformation from discrete physical stacking to a continuous microscopic mutual embedding structure is realized, and the interface bonding strength consistency and the cold-bending-resistant processing performance are improved.

The application discloses a kind of coal-water slurry suspending stabilizer and preparation method thereof, it is related to coal-water slurry suspending stabilizer preparation technical field, including the following raw materials: modified carboxymethyl cellulose, modified warm wheel glue, thickening agent, polyacrylamide, chelating agent, antioxidant, modified triethanolamine and hydrophobic modified polyether.In the application, modified carboxymethyl cellulose is added, which can build a uniform three-dimensional colloidal network at room temperature, accurately control the apparent viscosity of coal-water slurry at 25 DEG C, provide basic steric hindrance suspension support, and improve the shear stability of the system, laying the foundation for the core performance of rheology and suspension at room temperature of the stabilizer.Modified warm wheel glue is added, which can significantly reduce the water separation rate of coal-water slurry for 168 h, firmly bind coal particles to prevent sedimentation and hard sediment formation, maintain a stable network structure in high temperature and high salt environment, and ensure the long-term and high-temperature suspension stability of the stabilizer.

The invention relates to an anti-sloughing plugging agent (BLS-C) for plugging in ocean drilling and a preparation method of the anti-sloughing plugging agent. The plugging agent is prepared by compounding sulfonated modified asphalt, methacrylate grafted modified natural latex and silica fume with specific mesh ratio according to the mass ratio of (3: 1: 1)-(5: 1: 1). The preparation method comprises the following steps: sulfonating and modifying the 70 # asphalt and then crushing; centrifugally concentrating the natural latex, and then carrying out graft copolymerization reaction on the natural latex and the MMA monomer; kneading the modified asphalt, the modified latex and the silica fume in a kneading machine, drying and crushing to obtain a finished product. The product has the full-size plugging capacity, the HTHP filter loss is smaller than or equal to 5 mL, the crack plugging pressure bearing capacity is larger than or equal to 5 MPa, the shale expansion reduction rate is larger than or equal to 60%, the temperature resistance reaches 180 DEG C, salt resistance is high, the apparent viscosity change is small, the drilling fluid rheological property interference is low, biotoxicity is low, and the product meets the OSPAR environmental protection standard. The method is suitable for ocean drilling complex stratums and can effectively solve the problem of well wall stability.

The utility model discloses a kind of glass fiber reinforced plastic pultrusion forming glue injection dipping device, including glue dipping bucket and heating fixed cavity, one end of glue dipping bucket is equipped with conveying assembly, glue dipping bucket is sequentially provided with pultrusion forming die and heating solidification cavity in the end away from conveying assembly, pultrusion forming die is arranged on reflux component, glue injection mechanism is also equipped on reflux component, reflux component is equipped with auxiliary assembly inside.The vibration device in the auxiliary assembly of the utility model can drive the whole slight vibration of placing seat, on one hand, it assists the flow of glue liquid in reflux tank, and it is convenient to recycle;On the other hand, vibration can reduce the apparent viscosity of resin, improve fluidity, cooperate glue injection mechanism can carry out glue supplement on the surface of glass fiber, especially to the differentiating glue supplement of inner and outer layer in fiber bundle, make glue liquid more easily penetrate to the inside of fiber bundle, enhance the wetting ability to fiber bundle, reduce unimpregnated area between fibers.

This invention relates to a pharmaceutical preparation for cavity infusion, a cavity drug delivery system, and a method for preparing and configuring the pharmaceutical preparation, belonging to the field of pharmaceutical preparation and drug delivery engineering technology. Unlike traditional methods that determine the rheological properties of pharmaceutical preparations based on empirical viscosity ranges, this application proposes a reverse design method based on a target cavity physiological tolerance threshold. The pharmaceutical preparation is a shear-thinning non-Newtonian fluid that satisfies preset apparent viscosity constraints within high and low shear rate windows, balancing in-catheter pumpability and cavity retention / leakage resistance. The drug delivery system is configured based on a synergistic configuration of the physiological tolerance threshold and a target volumetric flow rate Q, ensuring that the peak dynamic impact pressure P during infusion is minimized. peak and / or wall shear stress τ wall Below the threshold, and the P can be assessed using an in vitro load assessment model. peak and / or τ wall Measurements and / or calculations using fluid dynamics models are performed to verify the technology. The proposed solution is applicable to drug delivery scenarios involving cavities such as the rectum, vagina, and bladder.

The present application relates to the technical field of cable manufacturing and industrial automation control, in particular to a cable extrusion process energy-saving control system based on edge computing, comprising: a multi-dimensional data acquisition module, which acquires the running state data of the extruder system in real time; an edge rheological solution module, which solves the apparent viscosity value of the current material in real time and constructs a virtual rheological state representation; a thermal engine efficiency decoupling module, which generates an energy efficiency comparison coefficient; a double-loop predictive control module, which is used for executing a dynamic set point drift strategy according to the energy efficiency comparison coefficient, and when the energy efficiency comparison coefficient indicates that the shear heat generation efficiency is superior to the electric heating efficiency, actively reducing the temperature set value of the temperature control loop to maintain the apparent viscosity value within the preset melting quality constraint range; the present application eliminates the energy consumption among the actuators and greatly improves the thermodynamic stability of the system.

The invention discloses a slurry rheological property calculation method and system, electronic equipment and a storage medium, and relates to the technical field of simulation analysis in a lithium battery manufacturing process. The method comprises the following steps: constructing a physical model for slurry simulation, and setting that a computational domain comprises a fluid phase and a discrete particle phase; establishing a fluid-solid coupling mathematical model, solving a fluid phase by adopting a computational fluid mechanics method, and solving a discrete particle phase by adopting a discrete element method; numerical coupling solution is executed, and flow field information and particle movement and stress information are interacted until flowing is stable; and obtaining the shear force of the fluid phase acting on the wall surface and the total shear force of the discrete particle phase lubricating force acting on the wall surface, and calculating the macroscopic apparent viscosity of the slurry according to the sum of the two shear forces. The method aims to accurately quantify the influence of the microcosmic dispersion state of the particles on the macroscopic rheological property through a numerical simulation means, so that the high-efficiency evaluation of the quality of the slurry is realized.

The invention relates to the technical field of bio-based polyamide preparation, and discloses a preparation process of bio-based polyamide for leather flexible coating, which comprises the following steps: salifying a bio-based long carbon chain monomer, carrying out pre-polycondensation, and triggering shear stress relaxation measurement at the high vacuum polycondensation end stage, the method comprises the following steps: collecting a melt torque attenuation curve by adjusting instantaneous speed reduction of a stirring device, calculating a shear stress attenuation rate based on the attenuation curve, and correcting a preset endpoint torque according to the shear stress attenuation rate until a target endpoint torque is reached. The chemical chain extension degree is accurately anchored, the uniformity of molecular weight distribution and the batch stability are improved, crystal nucleus growth is inhibited by cooperating with the steric effect generated by asymmetric monomers, and the leather coating has excellent flexibility and diffuse reflection extinction characteristics.

The invention provides a sealing device and a rotating component using the sealing device, wherein the sealing device is capable of achieving both low torque and high sealing performance by improving grease coated on a sealing lip or a matched component of the sealing lip. A seal ring (14) is fixed to a fixed-side member (2) of a rotating member, is in sliding contact with a rotating-side member (15), and has a seal lip that is in sliding contact with the rotating-side member (15), the sliding contact surface of the seal lip is coated with a grease, the grease contains a base oil, a thickener, and an additive, and the apparent viscosity of the grease at a shear speed of 1000 s <-1 > at 60 DEG C is 0.22 Pa * s or more.