201 results about "Newtonian fluid" patented technology

The invention relates to the technical field of control or regulation systems, and discloses a cooperative control method for a photovoltaic intelligent manufacturing equipment production line, and the method comprises the steps: a control unit collects the stock and change rate of materials in a physical cache region in real time; establishing and mapping the physical cache region into a virtual viscoelastic dynamic model with non-Newtonian fluid characteristics; calculating a virtual elastic restoring force enabling the stock to return to a balance point and a virtual viscous damping force preventing the stock state from changing based on the model; wherein an asymmetric anisotropic damping generation strategy is executed, and a damping coefficient is dynamically split according to a material flowing trend; and finally, superposing the virtual adjustment correction after vector synthesis to the basic transmission speed to generate a dynamic speed instruction, and by constructing a virtual dynamic field with rheological characteristics and an asymmetric damping mechanism, the problem of nonlinear cascade oscillation in discrete logistics transmission is solved, and differential self-adaptive suppression of accumulation and evacuation risks is realized.

The invention relates to the technical field of flexible circuit board manufacturing and packaging, in particular to an FPC assembly injection molding packaging structure and method based on dynamic mold flow control, and the structure comprises an FPC assembly, a first injection molding layer wrapping a welding spot area of the FPC assembly, and a second injection molding layer wrapping the first injection molding layer and the FPC assembly. The second injection molding layer is provided with an anchoring column penetrating through the reserved channel of the first injection molding layer or the through hole of the FPC assembly, and the anchoring column and the FPC assembly or the first injection molding layer form a mechanical interlocking structure. According to the FPC assembly injection molding packaging structure and method based on dynamic mold flow control, the electronic equipment and the storage medium, through a sandwich structure and in-situ mechanical interlocking design, the process control of a non-Newtonian fluid shear model and an unsteady state heat conduction equation is combined; the technical problems that in the prior art, procedures are tedious, stress concentration is caused by CTE mismatching, and welding spots are prone to being damaged in the injection molding process are solved.

The invention belongs to the technical field of industrial solid waste resource recycling, and discloses a nano composite filling material based on in-situ acid-base mutual modification enhancement and application thereof. According to the nano composite filling material, the alkalinity of the red mud and the acidity of the desulfurized gypsum are used for neutralization, the alkalinity of a system is reduced, a synergistic reaction is excited, a large number of ettringite crystals playing a key enhancing role are generated under the regulation and control of a nano material, and the ettringite crystals and a geopolymer form an interpenetrating network structure. The obtained slurry is low-viscosity and high-fluidity Newtonian fluid (diffusivity gt and 250 mm), the 7-day strength is larger than 2.0 MPa, the pH value is 7-9, and the fluorine ion concentration is lt; and the leaching of heavy metal ions is qualified, and the method is environment-friendly and safe. Efficient resource utilization of the red mud and the desulfurized gypsum is achieved, and the method is simple in process, low in cost and especially suitable for mine filling and engineering backfilling.

The invention relates to a turbine blade cooling optimization method and device based on non-Newtonian fluid. Comprising the following steps: step 1, carrying out grid division and simulation processing on a three-dimensional geometric model of the micro-channel of the turbine blade containing a shear groove to obtain a simulation grid model; 2, on the basis of the simulation grid model, determining a non-Newtonian fluid constitutive model suitable for the simulation grid model, and associating the non-Newtonian fluid constitutive model to the simulation grid model to obtain a fluid characteristic grid model; step 3, calculating index data based on the fluid characteristic grid model and the target equation; 4, adjusting the structure parameters of the shearing grooves in the simulation grid model, repeatedly executing the step 1 to the step 3 according to the adjusted structure parameters of the shearing grooves, and recording index data corresponding to the structure parameters of each group of shearing grooves to obtain a candidate data set; and 5, selecting the structure parameter of the shear groove with the comprehensive optimal resistance performance and heat transfer performance from the candidate data set according to the index data, and taking the structure parameter as an optimized target shear groove parameter.

The invention relates to the technical field of general control or regulation systems, and discloses a stirring torque self-adaptive cooperative control method for rheological characteristics of high-solid-content slurry, and the method comprises the steps: obtaining a feedback rotating speed signal and a torque current signal, and resolving the real-time angular momentum of a stirring system; extracting a phase deviation angle of the torque current signal relative to the feedback rotating speed signal to calculate a viscoelasticity characterization value, and correcting a virtual damping parameter of a speed control ring according to the viscoelasticity characterization value; a control error phase track is constructed in a phase plane of the controller, and the local curvature of the control error phase track is monitored, so that the rheological property sudden change state of the high-solid-content slurry is judged; according to the method, control instability caused by non-Newtonian fluid viscoelasticity lag is eliminated through phase domain closed-loop adjustment and phase trajectory singular point pre-judgment, and the operation stability of a driving motor under the extremely high damping working condition is guaranteed.

The invention discloses a bearing with stable lubricating performance, and relates to the technical field of bearing devices, the bearing comprises a static bearing and a dynamic bearing, the static bearing comprises a shell and a porous oil storage bushing, a sealing ring is arranged on one side of the porous oil storage bushing, an oil supplementing mechanism is arranged on one side of the sealing ring, and an auxiliary ring is arranged on one side of the oil supplementing mechanism; a movable bearing is arranged in the porous oil storage bushing and comprises a shearing shaft sleeve, a shaft wheel and supporting frames, the shaft wheel is arranged on the outer wall of the shearing shaft sleeve, the supporting frames are arranged on the two sides of the shearing shaft sleeve, the shearing shaft sleeve and the porous oil storage bushing are combined through the supporting frames, and one side of the shearing shaft sleeve is connected with an oil supplementing mechanism. An oil scraping plate and an oil outlet hole are integrated by rotating an oil supplementing arm, so that dynamic lubrication supply and pore self-cleaning are realized; by adopting the non-Newtonian fluid lubricant, the viscosity is improved under high-speed shearing, and the stability of an oil film under extreme working conditions is enhanced; the connecting block enables the oil supplementing system and the bearing to rotate synchronously, and self-adjusting lubricating circulation is formed.

The invention belongs to the technical field of vaccine adjuvants, and particularly relates to a water-in-oil-in-water adjuvant, a veterinary vaccine and a preparation method thereof.The water-in-oil-in-water adjuvant is prepared from, by weight, 0.5%-7.5% of a hydrophilic composite surfactant, 0.6%-9.8% of an oleophylic composite surfactant, 70%-85% of mineral oil and the balance water; and the mineral oil also comprises the following components in concentration: a reinforcing agent of 0.45-0.9 g / ml and a stabilizing agent of 2-6.9 g / L, wherein the water-in-oil-in-water adjuvant forms a gelatinous structure under the regulation of the stabilizer and is a non-Newtonian fluid of which the viscosity is not higher than 25cp; the adjuvant shows the non-flowing fluid characteristic through the stabilizer, the rheological property of the produced vaccine is enhanced, the stability of the vaccine is improved, on the premise that the hydrophilic surfactant and the oleophylic surfactant are balanced, the natural polymer enhancer is added, and on the premise that the adjuvant viscosity is reduced and granuloma side reaction is not prone to being generated, the stability of the vaccine is improved. Short-term immunity and long-term immunity can be induced at the same time, and the application of the water-in-oil-in-water adjuvant in the field of veterinary vaccines is expanded.

The invention discloses an air spring damping device with a vehicle body posture compensation function, and relates to the technical field of vehicle air spring damping. A piezoelectric ceramic stack main shaft assembly, an active variable stiffness spiral spring assembly arranged at the bottom of the piezoelectric ceramic stack main shaft assembly and a non-Newtonian fluid damping cavity assembly arranged at the bottom of the active variable stiffness spiral spring assembly are sequentially and coaxially arranged from inside to outside. The whole body is coordinated under the unified scheduling of a micro central controller, so that the piezoelectric stack outputs reverse-phase force to accurately counteract the impact, the spiral spring locks the number of turns through the actuating nut to realize the rigidity step improvement, and the non-Newtonian fluid instantaneously changes the viscosity through excitation to filter vibration. By means of formed synchronous cooperation, full-band road excitation is achieved, optimal composite compensation from high-frequency fine vibration to single large impact is achieved, and the contradiction between comfort and controllability is thoroughly solved.

The invention belongs to the anti-seismic field of underground engineering, and particularly discloses a pressure self-balancing tunnel lining surrounding rock composite damping structure and a pressure self-balancing method.The structure comprises a composite damping layer, and the composite damping layer comprises a surrounding rock contact layer close to the side of surrounding rock and a lining contact layer close to the side of a lining; the surrounding rock contact layer is made of a high-damping rubber-basalt fiber composite material and is pre-pressed and embedded into a surrounding rock crack; the lining contact layer is made of a composite viscoelastic material in which flexible capsules are uniformly embedded; the flexible capsule body is of an upper-lower double-layer structure composed of an upper capsule body and a lower capsule body, and the upper capsule body and the lower capsule body are filled with non-Newtonian fluid. A storage bag is arranged on one side of the lower-layer bag body and is separated from the other part of the lower-layer bag body; and one-way hydraulic valves are arranged between the upper-layer bag body and the lower-layer bag body and between the storage bag and the lower-layer bag body. The force balance between the surrounding rock and the lining can be adjusted according to the pressure designed in advance, and deformation coordination among the surrounding rock, the buffer layer and the lining is facilitated.

The present application belongs to the technical field of geotechnical engineering and indoor test, and provides a visual test device and method for interaction between high-pressure rotary jet flow and soft soil, which comprises a detachable model box, a jet medium simulation system, a high-pressure rotary jet flow generation system, an overburden pressure simulation system, a data acquisition system and a tracing system.The test device has the advantages of high visual degree, detachability, easy assembly and easy production.The jet medium simulation system has significant shear thinning characteristics, and has a high degree of reduction of the non-Newtonian fluid properties of cement slurry, which not only overcomes the problem of easy blockage of the pipeline, but also avoids distortion defects.The trajectory of the fluorescent powder particles in the jet medium simulation system can be captured by a high-speed camera under the irradiation of the pulsating laser beam generated by the pulsating laser, so as to accurately reproduce the flow field information of the high-pressure rotary jet flow in the soft soil.

The invention discloses a novel non-Newtonian fluid driven fixed abrasive polishing disc, and relates to the technical field of optical element polishing. The fixed abrasive polishing disc comprises an eccentric adjusting frame, a metal back plate, a caliber adjusting ring, a non-Newtonian fluid layer, a rubber sleeve, a fixing ring and a fixed abrasive polishing pad. The metal back plate is matched with the eccentric adjusting frame through the connecting shaft to achieve the adjustable eccentric distance, the caliber adjusting ring can be replaced with different calibers to meet different requirements, the rubber sleeve is filled with the non-Newtonian fluid layer, the fixed abrasive polishing pad is fixed with cerium oxide abrasive, and the size of the fixed abrasive polishing pad is slightly larger than that of the rubber sleeve. The dynamic stiffness characteristic of the non-Newtonian fluid layer is utilized to realize effective correction of full-band errors; the rigidity and efficiency are improved through the fixed grinding material, and hydration reaction is avoided; and multi-structure collaborative optimization of pressure transmission and fringe effect ensures process stability. Experiments show that the fixed abrasive polishing disk can reduce the intermediate frequency error of a fused quartz workpiece to 0.1 mu m and the Ra value to 1.6 nm, is suitable for diversified machining scenes and is high in practicability.

The invention relates to the technical field of fan blade machining, in particular to axial flow fan blade machining equipment and a using method, the axial flow fan blade machining equipment comprises a punching table, and a drilling machine controlled by a mechanical arm is arranged on one side of the punching table. According to the axial flow fan blade machining equipment and the using method, by means of the characteristics of high-speed solidification and low-speed fluidization of non-Newtonian fluid, a drill bit rotating at a high speed is inserted into the non-Newtonian fluid in the connecting cup during drilling, so that the non-Newtonian fluid is solidified instantly to form rigid connection, and then the clamping table is driven to rotate synchronously; and when the fan blades rotate to the position below the magnetic frame along with the clamping table, the drill bit is pulled away to enable the non-Newtonian fluid to recover the flow state, the clamping table rotates under the action of the reset spring, and the magnetic frame synchronously attracts and takes out the fan blades. According to the design, detection elements such as an additional sensor are not needed, the drilling completion state can be accurately judged through structural mechanical characteristics, the workpiece taking action is synchronously triggered, the manual intervention link is reduced, and the machining continuity and efficiency are greatly improved.

The application discloses a non-Newtonian fluid elastic auxiliary support clamp and belongs to the technical field of machining clamps. The clamp comprises a bottom plate provided with arrayed stepped mounting holes, an elastic auxiliary support assembly, a fixed support assembly and a pressing assembly. The upper section of the mounting hole is a smooth hole, and the lower section is a threaded hole; the elastic auxiliary support assembly comprises a non-Newtonian fluid medium filled in the hole, a compression spring arranged at the bottom and an elastic support nail in the shape of a stepped shaft. The fixed support and the pressing assembly are fixed in the mounting hole through threads. The application utilizes the shear thickening characteristic of the non-Newtonian fluid, and under the action of a milling impact force, the medium is instantaneously solidified to generate rigid support, thereby effectively inhibiting machining vibration and tool relief deformation of the overhanging part of a thin-walled plate part. The application has the advantages of simple structure, low cost, good universality and adaptability to multi-variety and small-batch production.

The present application relates to the technical field of mine filling crushing, and discloses a low-energy-consumption crushing and slurry modulation process for mine filling aggregate, which comprises the following steps: preparing a matrix slurry with non-Newtonian fluid characteristics, mixing coarse aggregate into the matrix slurry to form a crushing medium; controlling a crusher to apply crushing pressure in pulse strokes, so that the loading acceleration of the crushing load reaches a shear thickening threshold, the matrix slurry is induced to convert from a flow state to a quasi-solid state, a liquid-phase force transmission medium is constructed between the coarse aggregate, and the pressure load is directionally conducted along the coarse aggregate joint surface; and monitoring the current fluctuation characteristics of a motor and adjusting the feeding proportion of the matrix slurry and the coarse aggregate. The present application utilizes the shear thickening phenomenon to construct an efficient stress conduction path, reduces the crushing energy loss, utilizes the matrix slurry to capture new fine particles, prevents over-crushing and secondary grinding, and realizes the integration and cooperation of crushing and slurry modulation.

The utility model relates to the technical field of angle steel, and discloses an angle steel cold cutting machine which comprises a base, two base bodies are arranged above the base, a frame is installed between the two base bodies, two swing frames are hinged to the inner wall of the frame, and limiting cylinders are rotationally connected to the bottom ends of the two swing frames. The upper surfaces of the two swing frames are each fixedly connected with two first springs, and the other ends of the multiple first springs are fixedly connected with the frame. According to the angle steel cold cutting machine, angle steel of different sizes can be clamped through cooperation of a mounting limiting barrel and a first spring, swing of the angle steel can be limited in the angle steel shearing process through cooperation of a mounting sliding rod, a sliding barrel and a baffle ring, when the angle steel is sheared, impact force can enable the sliding rod to extrude non-Newtonian fluid in the sliding barrel, and the angle steel can be sheared through the non-Newtonian fluid in the sliding barrel. Due to the fact that impact force is rigid, non-Newtonian fluid cannot flow, the swing frame cannot swing, the two ends of the angle steel can be limited, and the two ends of the angle steel are prevented from swinging.

The application provides an anti-explosion underwater soft robot, and belongs to the field of robots.The problem that high transient energy of underwater explosion easily causes damage to internal components and circuits is solved.The anti-explosion underwater soft robot comprises a flexible circuit layer, a plurality of circuit modules are arranged on the flexible circuit layer, and the circuit modules are flexibly connected; a non-Newtonian fluid buffer layer is wrapped outside the flexible circuit layer; an elastic buffer layer is wrapped outside the non-Newtonian fluid buffer layer; and a driving unit is connected with the elastic buffer layer and used for driving the robot to move.The anti-explosion underwater soft robot is mainly used for underwater safety detection and underwater resource exploration.

The invention discloses a non-Newtonian fluid-based particle and biomolecule stepping separation method and device. Through microstructure arrangement of the non-Newtonian fluid, particles and biomolecules which cause different shear rates have blocking and passing characteristics, molecules with different volumes and different charge quantities are separated under the action of a square wave electric field, or molecules with different volumes and different charge quantities are separated under the action of a uniform gradient square wave magnetic field. The invention relates to a method for separating particles with different ferromagnetism or biomolecules combined with magnetic microbeads. Comprising a non-Newtonian fluid and a carrier thereof, a square wave electric field for providing power and a corresponding electrode or a magnetic field generator, and a support carrier for accommodating particles and biomolecules. After the particles and the biomolecules are separated in the square wave electric field for a period of time, the electric field intensity is changed, the second type of particles or biomolecules are separated, and the electric field intensity is sequentially switched according to the number of components to be separated, so that the separation purpose is achieved.

To provide a measuring device and a measuring method capable of separately determining a diffusion coefficient of particles contained in a fluid and an advection velocity of the fluid, and determining a shear viscosity characteristic and a temporal characteristic of a non-Newtonian fluid by on-site observation, in the measuring device formed by combining OCT and DLS.SOLUTION: A coupling optical unit that couples reflected or scattered light with reference light that is not reflected or scattered by the observation object, a detection unit that detects coupled light coupled by the coupling optical unit, and a control unit that acquires an optical coherence tomographic image of the observation object on the basis of the coupled light, the control unit records an optical coherence tomographic image of the fluid from the acquired optical coherence tomographic image of the observation object, obtains each of characteristic values representing degrees of thermal motion and advective motion of particles contained in the fluid based on the optical coherence tomographic image of the fluid, and outputs position information of each of the characteristic values in a two-dimension space and time information representing a temporal change of the characteristic value.SELECTED DRAWING: Figure 2-1

The invention relates to the technical field of robot grabbing, in particular to a non-Newtonian fluid adhesion gripper based on shear thickening and grabbing equipment, the gripper comprises an adhesion module, a speed control module, a speed driving module and a switching module; the adhesion module comprises an adhesion film, a sealing mounting plate and shear thickening non-Newtonian fluid arranged in a containing space formed by connecting the adhesion film and the sealing mounting plate, and the fluid is in a soft state at a low shear rate, can be attached to the surface of an object, and is hardened at a high shear rate and locks the contact area to generate strong adhesion force; the speed control module comprises an inner distance transmission coupler and a stirring device and is used for applying a shearing effect to fluid to realize soft and hard state switching; the speed driving module comprises an outer distance transmission coupler and a driving device, and drives the stirring device through magnetic distance transmission torque; the switching module is used for installing the gripper on a mechanical arm or an assembly line, the gripper has the functions of grabbing stably and releasing quickly and can adapt to curved-surface, special-shaped and fragile objects, and the damage risk is reduced.

A fluid material analysis and detection device comprises a Brinell fluid detector body, and a calibration beryllium copper spring of the Brinell fluid detector body is sleeved with a corrugated pipe; auxiliary fixing structures are uniformly arranged in the middle of the stabilizing bracket; a positioning clamping block is arranged on the outer wall of a main shaft of the rotor, the rotor is one of a common rotor and a Newtonian fluid test rotor, and clamping grooves matched with the positioning clamping block are formed in the tops of the inner walls of the common rotor and the Newtonian fluid test rotor; and the positioning clamping block is fixedly connected with the clamping groove of the common rotor or the clamping groove of the Newtonian fluid test rotor through a vertically arranged fixing bolt. The problem that in the prior art, when a fluid material analysis and detection device is used for detecting non-Newtonian fluid, the detection error is large is solved.

The invention discloses a thorn edge type grid armored grid bar, which relates to the technical field of armored protection, and comprises at least one grid unit, each grid unit comprises a grid bar body, a non-Newtonian fluid and at least one thorn rib; the grid body is arranged on the outer surface of the protective equipment; the grid body is provided with a hollow cavity; the non-Newtonian fluid is filled in the hollow cavity; the thorn ridge strips are fixedly arranged on the outer side wall of the grid body and are arranged in parallel, and the length extending direction of the thorn ridge strips is perpendicular to the outer surface of the protective equipment. When an unmanned aerial vehicle is attacked by throwing grenades and rocket projectiles, the thorn edge strips can eject the thrown ammunition or pierce the suicide type unmanned aerial vehicle, and when the grid body is impacted by the rocket projectiles, the instantly-deformed non-Newtonian fluid can also absorb a large amount of impact energy while the deformation interception effect of the grid body is achieved, so that the safety of the suicide type unmanned aerial vehicle is improved. Huge impact caused by explosion is greatly reduced, and the protection effect is achieved.

The application discloses a kind of micro tube robot assembly, drive and radial extrusion method, assembly includes the following steps: step one, 0.05-2wt.% magnetic colloidal particles are assembled into two-dimensional monolayer colloidal film under xy plane oscillation magnetic field;Step two, z direction direct current magnetic field is applied and gradually increase magnetic field intensity, until monolayer colloidal film breaks into sheet;Step three, precession magnetic field is applied, sheet is bent to form the micro tube robot of dense hollow tubular structure;Drive: micro tube robot can be accurately controlled by three-dimensional magnetic field and drive direction and speed, hollow interior space is used to capture and transport micro cargo;Radial extrusion: micro tube robot assembled under oscillation magnetic field can realize radial direction repeated extrusion without breaking.The present application realizes metastable assembly from one-dimensional isotropic microspheres to three-dimensional micro tubular micro robots for the first time, is suitable for newtonian fluid and non-newtonian fluid, and can meet different application scenarios.

The invention relates to the technical field of fluid mechanics, and discloses a method for determining a volume evolution model of a Newtonian fluid liquid film under the action of shear airflow, and the method comprises the following steps: determining the thickness of the liquid film; determining an equilibrium equation based on set conditions; determining an expression of shear force of the liquid film surface according to the liquid film thickness and the liquid film surface speed; determining an expression of shearing force of the shearing airflow to the liquid film; substituting the two expressions into an equilibrium equation to obtain a liquid film surface velocity equation; determining a liquid membrane continuity equation and a liquid membrane internal velocity equation; substituting the liquid film internal velocity equation and the liquid film surface velocity equation into a liquid film continuity equation to solve the time evolution process of the liquid film, and obtaining differential equations of liquid film volume evolution under the action of uniformly accelerated shear airflow and uniform shear airflow, so as to construct a model; the model has high accuracy for the volume evolution rule of the Newtonian fluid membrane.

The invention discloses a civil air defense door of a composite structure and an installation method of the civil air defense door. The problems that a traditional civil air defense door is large in weight and fixed in performance, and a non-Newtonian fluid pre-filling scheme loses efficacy easily after being stored for a long time are solved. A cavity is formed in the door leaf, and a storage box for pre-storing solid particle powder is detachably contained in the cavity. And a liquid storage tank is additionally arranged and is communicated with the cavity through a pipeline. During use, liquid base liquid is injected into the cavity to be mixed with powder, a non-Newtonian fluid protection layer is formed through activation, and the problem of material sedimentation failure is fundamentally solved. According to the invention, the cavity is divided into two layers, namely the attack-on surface and the attack-back surface, and liquid injection can be independently controlled, so that switching between a standard protection mode and a reinforced protection mode is realized. And the modular storage box design is adopted, so that powder can be uniformly distributed, rapidly replaced and upgraded. The civil air defense door is not provided with a storage box at ordinary times so as to keep light, is quickly mounted during use so as to realize heavy load protection, and has the advantages of high reliability, flexibility and convenience in maintenance.

The invention discloses a segmented series spring shock absorber and machining equipment, and belongs to the technical field of vehicle shock absorption. The shock absorber comprises a gas spring, a heavy-load spring, a light-load spring and a retainer, wherein the retainer is arranged between the light-load spring and the heavy-load spring; a load energy release device and a temperature adaptation assembly are further arranged on the retainer, and the load energy release device comprises a bearing disc, an annular storage cavity and an energy release pad and is used for absorbing beat vibration energy; the temperature adaptation assembly comprises a ventilation hole and a friction pad, heat generated by the friction pad can be transmitted to the energy release pad, and low-temperature compensation and high-temperature heat dissipation are achieved. The invention further provides milling equipment for machining the clamping-in groove and the wedge-shaped groove, precise machining of the wedge-shaped groove is achieved through the eccentric milling principle, and the pressure relieving assembly ensures that a cutter stably stretches out through buffering of non-Newtonian fluid. The problems of response accuracy, retainer stability, beating vibration durability and temperature adaptability of the shock absorber under different load working conditions are effectively solved.

The invention relates to the technical field of submarine cable protection, in particular to a bionic submarine cable protection device based on non-Newtonian fluid, which comprises a bending limiting unit, the bending limiting unit comprises a filling layer and a protection layer, and the filling layer is arranged on the inner side of the protection layer; the filling layer is filled with a non-Newtonian fluid filler; and the vortex-induced vibration suppression unit comprises a flexible bionic fin, and the flexible bionic fin is arranged on the outer side of the protective layer and is used for suppressing vortex-induced vibration of the submarine cable. Non-Newtonian fluid is used as a filling medium of the filling layer due to the physical property, and connecting discs are symmetrically arranged at the upper end and the lower end of the protective layer, so that a bending limiting unit similar to a'bamboo joint type 'is formed, self-adaptive matching of the rigidity of the device and a dynamic load borne by the submarine cable is achieved, stepless and smooth transition from'flexibility' to'rigidity 'is achieved, and the service life of the submarine cable is prolonged. And a bending limiting function is realized while a certain bending degree is provided for the submarine cable.

The present application relates to the technical field of electrical components, and more particularly to a armored strong pressure-resistant control cable, to solve the problem that the anti-extrusion structure of the existing cable is formed by splicing multiple components to form a protective structure, which makes it difficult to absorb impact and easy to fail, difficult to reset and damage the internal core components, and ultimately leads to a decrease in the cable's pressure resistance; when the cable encounters a violent impact, the non-Newtonian fluid in the damping ring hardens to absorb the impact force and maintain the circular ring shape; when subjected to continuous extrusion, the support ring first becomes elliptical, then drives the trigger assembly to move, and then the main air bag inflates the auxiliary air bag through the air outlet pipe to protect the cable core; when the pressure disappears, the support ring resets, and finally the compression-resistant rings A and B block the positive and oblique pressures, thereby improving the cable's pressure resistance.

The invention discloses a preparation method of a non-Newtonian fluid-based temperature-shear dual response type ophthalmic sustained-release drug carrier, and belongs to the technical field of ophthalmic medicines. The preparation is composed of a dispersed phase (a temperature response type targeting nano-drug carrier) and a continuous phase (a non-Newtonian fluid matrix), wherein the mass fraction of the dispersed phase in the continuous phase is 0.5-2%. The temperature response type targeted nano-drug carrier is of a core-shell two-layer structure, the core is composed of a PLGA-PEG copolymer and an active drug, the shell is formed by grafting poly N-isopropylacrylamide (PNIPAM) and hyaluronic acid, and the lowest critical solution temperature (LCST) of the PNIPAM is 35-37 DEG C; the non-Newtonian fluid matrix is a pseudoplastic fluid, is composed of Carbomer 940 and triethanolamine, and has a shear thinning characteristic. The preparation method comprises the following three steps: preparation of the temperature response type targeting nano-drug carrier, preparation of the non-Newtonian fluid matrix and low-speed dispersion and compounding of the two. According to the invention, shear-response convenient administration, temperature-response precise drug release and long-acting retention synergism are realized, the bioavailability of the drug and the compliance of a patient are remarkably improved, the stability is excellent, the preparation process is simple and controllable, and the preparation method is suitable for long-acting targeted therapy of chronic eye diseases such as allergic conjunctivitis, chronic xerophthalmia, glaucoma and the like.

The application provides a centrifugal pump impeller design method and a centrifugal pump impeller for conveying high-viscosity non-Newtonian fluid, and aims at the problems of high shear force peak, efficiency attenuation and medium damage when the existing centrifugal pump conveys high-viscosity non-Newtonian fluid. The flow passage outlet section is configured as a three-section type water-drop-shaped section, which is a semi-elliptical section, a Bezier narrowing section and a rounded tip in sequence. The number of flow passages is determined according to the viscosity of the medium, and the higher the viscosity, the fewer the number of flow passages. The inside round corner, the outside round corner and the inlet edge margin in the flow passage are adjusted by using the average shear rate of the outlet surface, and a complete flow passage is constructed by using a gradual transition section. The application can significantly suppress the shear rate peak, reduce the amplitude by more than 86%, and maintain the head and efficiency, and is suitable for efficient and low-damage conveying of high-viscosity non-Newtonian fluid in the fields of petroleum, chemical industry, food and biological medicine.

The application discloses a separation column resin saturation online monitoring method and system, and belongs to the technical field of medical apparatuses, which comprises the following steps: acquiring real-time acoustic impedance data of the inlet end and the outlet end of the separation column; calculating the instantaneous difference value of the real-time acoustic impedance data of the inlet end and the outlet end as the real-time acoustic impedance instantaneous difference value; measuring the radial blood flow velocity distribution of the middle section of the separation column and generating a flow field disturbance factor according to the radial blood flow velocity distribution; applying a local pulse thrust to the resin bed layer in the separation column and acquiring the instantaneous acoustic impedance difference value after disturbance; and generating a relaxation recovery curve according to the change of the instantaneous acoustic impedance difference value after disturbance with time. The application can overcome the problem that the existing monitoring method cannot adapt to the blood non-Newtonian fluid characteristics and the interference of flow field dynamic fluctuations on the monitoring signal, so as to eliminate the non-absorption signal deviation caused by the flow field fluctuations and further improve the resin saturation monitoring accuracy.