68 results about "Fluid shear" patented technology

The application relates to the technical field of biological sample pretreatment, and discloses a high-efficiency separation method of a tissue cell extraction device. The method comprises the following steps: performing parameter calibration and reference loss modeling of a driving motor, and eliminating background interference of an actuator; applying a disturbance signal to a dissociation chamber, locking the characteristic resonance frequency of a tissue sample through frequency domain energy analysis, and performing pulsating crushing to accelerate the dissociation of a matrix structure; extracting the net torque of the motor in real time, deducing the fluid dynamic viscosity, adaptively adjusting the motor speed according to the viscosity drop trend, maintaining the fluid shear force in a preset target interval, and avoiding mechanical damage to cells; calculating the mechanical energy dissipation power in real time, and performing feedforward temperature control compensation to eliminate temperature overshoot caused by thermal conduction lag. The application realizes closed-loop control of the physical phase evolution of a heterogeneous tissue dissociation process, solves the limitation of a fixed parameter in a traditional method, shortens the dissociation time, and significantly improves the single-cell yield and survival rate.

The utility model provides a liquid mixing bottle with a self-cleaning function, which is characterized in that the top of a bottle body is locked with an extension ring butt-joint thread II of a connecting cover through a butt-joint thread I to form primary sealing, and a fixing ring at the top of the connecting cover is locked with a bottle opening thread II at the bottom of a bottle opening through a bottle opening thread I to form secondary sealing; a V-shaped spiral flow guide strip is arranged on the inner wall of the bottle body, a gap is kept between the highest point of the flow guide strip and the bottle wall to form a capillary channel, the inner wall inclined face of the connecting cover is seamlessly connected with the outlet end of the flow guide strip to form a continuous flow guide path, and the spiral washing effect can be triggered to achieve self-cleaning when liquid is poured. A hydrophobic nano-coating is arranged on the inner wall of the liquid outlet hopper, and the inclination angle is larger than the inclined surface of the connecting cover; the flow guide strip extension design of the extension ring and the fixed ring ensures no dead angle of mixing, the modular thread structure supports rapid disassembly and maintenance, and the inclination angle of the flow guide strip and the curvature of the bottle body are coupled to optimize the fluid shear force.

This invention discloses an electronic-grade reinforced textile fiberglass cloth product and its production method, belonging to the field of high-performance PCB and copper-clad laminate substrates. The fiberglass cloth is woven from warp yarns and flat-section weft yarns, with a reactive impregnation layer covering the surface of each glass fiber monofilament. Two-dimensional sheet-like nanofillers, preferentially parallel-oriented along the fiber axis, are dispersed within this layer. The production method achieves axial orientation of the nanofillers through a fluid shearing and external field synergistic coating process, followed by low-temperature conditioning to form a semi-cured state and lock the orientation structure. This invention eliminates the need for high-temperature heat cleaning, maximizing the preservation of the fiber's original strength. Furthermore, the synergistic effect of the macroscopically dense weft yarns and the microscopically oriented thermally conductive network of the nanofillers significantly improves the in-plane thermal conductivity of the substrate and reduces dielectric loss, solving the thermal resistance and warping problems caused by resin enrichment at the interlacing points of traditional fiberglass cloth.

This invention discloses a high-strength composite membrane with a multi-barrier structure and its preparation process, belonging to the field of composite membrane preparation technology. It addresses the technical problem that the barrier and tensile properties of existing composite membranes need further improvement. Specifically, it includes the following steps: uniformly coating a carboxyl-rich polysaccharide graft copolymer solution onto the surface of a release PET film, drying it to a moisture content of 15-20% to obtain a matrix layer. This invention sequentially coats carboxyl-rich polysaccharides to construct a highly active matrix, sprays zirconium phytate sol at the interface to induce coordination crosslinking, then coats dopamine-modified MXene and uses fluid shear force to achieve highly parallel orientation of nanosheets. Finally, it removes micropores through segmented vacuum hot pressing and deeply cures the membrane. This integrates interfacial chemical anchoring, forced shear orientation, and thermal coupling densification, constructing a dense three-dimensional interpenetrating barrier network in situ, synergistically improving the tensile strength and gas-liquid shielding performance of the composite membrane.

The utility model belongs to the technical field of petrochemical equipment, and provides a continuous flow control type closed decoking flow-limiting valve which comprises a valve body, a first composite valve element and a second composite valve element. The first composite valve core comprises a first valve plate, a first valve core, a first driving mechanism and the like; the second composite valve element and the first composite valve element are symmetrical. According to the flow-limiting valve, the through grooves of the first combined valve element and the second combined valve element jointly form a small valve hole, the first driving mechanism drives the first connecting rod to move to drive the first transmission rod and the first valve element to move, and therefore the small valve hole can be opened. The first driving mechanism drives the first connecting rod to continue to move until the first transmission rod abuts against the first limiting ring and drives the first valve plate to move, and then the large valve hole can be opened. Equipment is arranged at the position of a small valve hole during flow limiting, and is arranged at the position of a large valve hole during coke cutting, so that the problem that the fluid shear force cannot be dynamically adjusted to inhibit coking due to the adoption of a fixed flow limiting hole diameter in a traditional plate type flow limiting valve is effectively solved.

The application belongs to the technical field of oil detection, and particularly relates to a spinning oil online detection system based on edge computing, which comprises the following steps: obtaining spinning oil frequency shift and energy loss data, fitting to obtain oil film adsorption capacity, viscoelasticity and shear loss modulus, combining microfluidic pressure signal to calculate fluid shear force, constructing a friction energy loss database and normalizing to form a feature vector, fusing with dielectric constant and ion mobility data, extracting interface conductance and molecular motion parameters, establishing a lubrication and charge conduction coupling model, converting the model into a spatial charge density matrix, matching the matrix with time domain data of the yarn tension transient state, calculating a correlation coefficient and generating an antistatic and smoothness coupling evaluation index, fitting a prediction model through multi-temperature and humidity, and outputting a quantitative conclusion to guide the formula and process. Through multi-sensing fusion and edge computing, the application realizes full-dimensional detection and optimization of oil performance, and improves detection precision and production efficiency.

This invention belongs to the field of energy exploration, specifically relating to a novel vibratory cementing tool designed to solve problems such as poor frequency controllability and uncontrollable vibration time in existing conventional electric vibratory tools. The invention includes an upper connector assembly, one end of which is detachably and fixedly connected to the vibratory cementing tool body, and the other end of which is detachably and fixedly connected to a triggering and starting assembly; a control assembly, disposed on one side of the other end of the triggering and starting assembly and fixed to a power assembly; a power assembly, disposed below and fixed to the control assembly; a vibration assembly, disposed below and fixed to the power assembly; and a rotary guide assembly, disposed below the vibration assembly and detachably and fixedly connected to the inner surface of the vibratory cementing tool body. This invention reduces drilling fluid shear force, removes cement cake from the cementing surface, improves cement slurry displacement efficiency, and the generated vibration waves propagate longitudinally, allowing for more thorough contact between the cement slurry and the wellbore and casing.

The invention discloses a microfluidic device and method for observing generation and migration of microbubbles. According to the chip related to the microfluidic device, generation and migration of microbubbles can be carried out in a plane, gas-phase fluid is sheared by liquid-phase fluid in a cross-shaped channel to generate continuous microbubbles with controllable and uniform sizes, and the fluid is introduced into a porous medium model after passing through a slow flow design in the chip; therefore, the migration and plugging effects of the microbubbles in different media can be observed. The integrated design can greatly reduce the interference of the external environment on the microbubbles, and prevents the microbubbles from coalescence and floating in the storage process. Compared with a common glass etching chip, the polydimethylsiloxane (PDMS) chip is lower in cost and shorter in construction period, and can be customized and replaced according to different porous media.

This invention discloses a method and apparatus for micro-lubrication of magnetic shear-thickening nanofluid, belonging to the field of micro-lubrication and cooling in machining. The method is based on a micro-lubrication system, which includes an air pump, a pressure valve, a Rank-Hillsch vortex tube, a reservoir, a reciprocating pump, a flow controller, and a micro-lubrication nozzle. The reciprocating pump pressurizes and delivers the magnetic shear-thickening fluid from the reservoir to the micro-lubrication nozzle. Compressed air, after being pressurized by the pressure valve, enters the vortex tube for diversion. The hot airflow at the hot end of the vortex tube preheats the fluid in the reservoir, shear-thinning it to improve its flowability. The low-temperature cold air at the cold end mixes with the fluid within the nozzle. Under the influence of the built-in magnetic field in the nozzle, a low-temperature nano-atomized particle cluster spray is formed and directed towards the machining area. Upon contact with the workpiece, the spray transforms into the magnetic shear-thickening fluid, forming a lubricating film at the tool-workpiece interface, achieving efficient cooling and lubrication and improving machining quality.

This invention discloses a method and system for emission control of high-salinity wastewater through cascaded evaporation and concentration, relating to the field of intelligent control technology. The method includes: heating the high-salinity wastewater with an external heat source, employing seed deposition and frequency conversion regulation based on a fluid shearing device to perform evaporation and concentration treatment in the precipitated phase state, obtaining a concentrated liquid with low scaling tendency; sequentially flowing the concentrated liquid into a temperature-controlled crystallizer connected in series in a gradient separation unit for temperature control stabilization and gradient separation treatment to obtain the separation result; and multi-threaded transport and post-processing of the various crystalline components and mother liquor based on the separation result. This invention solves the technical problem in existing technologies where the differences in salt composition during high-salinity wastewater treatment are difficult to effectively identify and target, leading to insufficient adaptability and low overall treatment efficiency. It achieves the technical effect of adaptive optimization and adjustment of the treatment path based on changes in salt composition, thereby improving overall treatment efficiency and operational stability.

The invention relates to the technical field of sewage treatment, and particularly discloses sewage treatment equipment for cleaning waste incineration slag, which comprises a tank body, and a discharging hopper is arranged in the tank body and is used for temporarily storing medicine powder; at least one material mixing barrel is arranged in the tank body, the material mixing barrel is communicated with the discharging hopper and can do revolution motion and autorotation in the tank body, and a through groove is formed in the side wall of the material mixing barrel; a sealing assembly is arranged at the top of the mixing barrel and used for controlling communication or separation between the discharging hopper and the interior of the mixing barrel; according to the sewage treatment equipment for cleaning the waste incineration slag, medicine powder is directly released in the middle depth of sewage from the moving material mixing barrel instead of being thrown from the liquid level, so that the medicine powder is immediately located in an environment surrounded by water flow and is quickly dispersed by utilizing fluid shear force, and the treatment effect is improved. The problems that light medicine powder floats on the liquid level, is caked and is difficult to dissolve are fundamentally solved, each material mixing barrel serves as a moving point source, and the medicine adding position is continuously changed in the revolution and rotation process.

The invention relates to a method for measuring cohesive force and micromechanical parameters of a wax crystal flocculating constituent based on a microfluidic-CFD-DEM (Cyclic Frequency Division-Digital Elevation Model), which combines microfluidic experimental observation with CFD-DEM numerical simulation to quantitatively characterize the formation-crushing dynamic behavior of the wax crystal flocculating constituent. Microfluidic experiment observation is carried out through the wax crystal flocculating constituent dynamic behavior observation platform, and visual observation of the wax crystal flocculating constituent forming process and the breaking process under the fluid shearing effect is achieved. A mathematical model consistent with microfluidic experiment conditions is constructed in the CFD-DEM, and a dynamic crushing process of a flocculating constituent in a shear flow field is calculated and simulated through bidirectional fluid-solid coupling; and comparing the simulated crushing result with microfluidic experiment observation data, and when the relative error between the simulated crushing result and the microfluidic experiment observation data is smaller than a certain value, accurately measuring the cohesive force and the micromechanical parameters of the wax crystal flocculating constituent. According to the device and the method, accurate measurement of the cohesion and micromechanical parameters of the wax crystal flocculating constituent through inversion of experimental phenomena is realized.

This invention belongs to the field of water environment monitoring technology, specifically providing a remote operation and maintenance system for water environment quality monitoring equipment. The system includes an alternating measurement and decoupling module, a mutually exclusive collaborative decision-making module, a hydraulic transient suppression and calibration reconstruction module, and a physical mechanism mapping correction module. The alternating measurement and decoupling module acquires signals through three alternating measurements and decouples the equivalent fouling film thickness and probe sensitivity attenuation coefficient based on a joint inversion model. The mutually exclusive collaborative decision-making module generates mutually exclusive control commands accordingly, outputting a timing combination command of cleaning followed by calibration during mixed degradation. The hydraulic transient suppression and calibration reconstruction module calculates the delay time by fitting a hydraulic time constant to the pipeline pressure attenuation data and obtains the reconstructed calibration signal. The physical mechanism mapping correction module updates the fluid shear force mapping coefficient in the joint inversion model by combining the previous and subsequent fouling film thicknesses with the hydraulic time constant. This invention achieves physical separation of the root causes of anomalies and precise mutually exclusive scheduling.

A fluid shear inducer includes a housing defining a primary flow path, a secondary flow path branching from the primary flow path, a return junction connecting the secondary flow path back to the primary flow path, and a fluid accelerator associated with the secondary flow path. A method for shearing fluid includes flowing a fluid into a housing defining a primary flow path and a secondary flow path, branching some of the flowing fluid from the primary flow path into the secondary flow path, accelerating the fluid in the secondary flow path, and impinging the accelerated fluid from the secondary flow path into the fluid in the primary flow path. A fluid system includes a fluid reservoir, a pump operably connected to the reservoir, and a fluid shear inducer fluidly connected to the pump.

The utility model relates to the technical field of microfluidic structures, and provides a microfluidic chip, which comprises a filter membrane layer, a first plate body and a second plate body, the first plate body is provided with a first end face and a first side face, the first end face is recessed to form a first groove structure, the first side face is provided with a first sample inlet and a first sample outlet, and the second plate body is provided with a second groove structure. The first sample inlet and the first sample outlet are both communicated with the first groove structure; the second plate body is provided with a second end face and a second side face, the second end face is sunken to form a second groove structure, a second sample inlet and a second sample outlet are formed in the second side face, and the second sample inlet and the second sample outlet are both communicated with the second groove structure. According to the micro-fluidic chip provided by the utility model, the characteristics of the filtering membrane layer are fully utilized, and the stimulation and interference on the fluid shear force of a sample in the second plate body when fluid is injected into the first plate body can be greatly reduced on the premise of ensuring the material exchange between the first plate body and the second plate body.

The invention provides a preparation method of aramid fiber with high thermal stability, and relates to the technical field of aramid fiber preparation, and the preparation method comprises the following three steps: synthesis of a narrow distribution aramid precursor solution, acid coagulating bath spinning and three-section boosting mode drafting forming, and catalytic crosslinking and stabilizing treatment. By controlling molecular weight distribution and removing low-molecular-weight impurities, structural defects caused by component volatilization during heat treatment are reduced from the source, a uniform molecular basis is provided for fibers, molecular chains are forced to be highly oriented in the axial direction by utilizing fluid shear force in a three-section pressure rising mode drafting mode, the structural compactness of the fibers is enhanced, and meanwhile, the mechanical property of the fibers is improved. The molecular chain slippage tendency at a high temperature is reduced, finally, through catalytic cross-linking stabilization treatment, the activation energy of the imidization reaction is reduced by utilizing a supported catalyst, and the residual stress is eliminated in cooperation with a gradient heating stabilization process, so that the fiber shows excellent thermal stability in a high-temperature environment.

The invention discloses a welding process for parts of a water storage tank of a liquid cooling system, suspension liquid is needed during welding, the suspension liquid is prepared from deionized water, citric acid monohydrate, nitric acid, hydrofluoric acid, precipitated barium sulfate micro powder, magnesium fluoride micro powder and composite corrosion inhibition dispersion premixed liquid, and the welding process comprises the steps that the parts of the water storage tank are tailor-welded and subjected to electrolytic polishing; argon is filled for closed welding; a suspension and a stainless steel grinding needle are injected into the cavity, and alternating magnetic force polishing is conducted; and discharging waste liquid, and performing high-pressure washing and neutralization. According to the method, a fluid physical network with yield stress is constructed, and a high-viscosity state is maintained in a static non-working area to shield and protect a base material; in a closed weld zone, a magnetic field drives a grinding needle to generate mechanical shearing force to shear and dilute fluid, targeted release of acid liquor softens oxide skin, physical stripping is completed by combining inorganic micro powder friction, and fixed-point removal of blind zone welding spots and synchronous protection of base metal in a non-working zone are achieved.

This application discloses a fracture-resistant tensile clamp for a push-pull force gauge, comprising a base, a force gauge, and a clamp. The force gauge is fixed on the base, and the clamp is used to hold the product under test. The base has a slide rail cavity, in which a slider is slidably fitted, and the slider is rigidly connected to the clamp. The slide rail cavity is filled with a non-Newtonian fluid, and the slider has a fluid shear structure. The fluid shear structure causes the non-Newtonian fluid in the slide rail cavity to generate velocity-related flow resistance when the slider moves. The slide rail cavity includes a main working cavity and a secondary compensation cavity that are interconnected, and a fluid channel is provided between the two cavities. This fracture-resistant tensile clamp for a push-pull force gauge, through the buffering effect of the non-Newtonian fluid and the shear structure, combined with the main and secondary cavity structure of the slide rail cavity, can effectively protect the clamp and equipment under various actual testing conditions, especially when facing sudden tensile impacts. It also has good compatibility with the tested products, and has significant practical value and promotional significance.

The invention relates to the technical field of food processing and industrial automation control, and discloses a bone soup sterilization effect real-time detection and intelligent regulation and control system based on machine vision, which comprises a bone soup industrial sterilization main loop, a bypass online intelligent detection feedback loop and a central control unit, the bypass loop is provided with a heat flow coupling conditioning unit, a micro-fluidic sorting chip and a polarized optical detection unit; wherein the heat flow coupling conditioning unit maintains a constant Reynolds number by adjusting fluid temperature; the microfluidic sorting chip physically separates fat globules from microorganisms by using the difference between inertial lift force and Dean drag force; the polarization optical detection unit quantifies the thermal lethal state of the microorganisms by calculating the polarization retention rate according to the fluid shear induced deformation principle; and the central control unit adjusts a steam adjusting valve and a feeding pump of the main loop by adopting a split-range PID (Proportion Integration Differentiation) strategy based on a detection result. According to the invention, fat interference is effectively eliminated, and real-time nondestructive detection of the sterilization effect and process closed-loop control are realized.

This invention relates to the field of food and beverage processing machinery, specifically a degassing device for fruit juice production. It comprises a vacuum degassing tank, a variable frequency drive motor, a central feed pipe, a rotating umbrella-shaped film-forming disc, a streamlined impact turbulence ring, and an adaptive control module. The device utilizes the central feed pipe in conjunction with the rotating umbrella-shaped disc to spread the fruit juice into a liquid film through centrifugal force. The adaptive module calculates the dynamic shear resistance of the fruit juice based on the effective working current, thereby adjusting the motor speed in real time. Its core principle is to generate fluid shearing and reversal effects by impacting the streamlined turbulence ring with the high-speed liquid film, effectively tearing apart the fruit fiber network that encapsulates the air bubbles, allowing the microbubbles to escape rapidly in a vacuum environment. This invention avoids complex flow channel structures, solving the problems of easy clogging and material residue, reducing cleaning frequency, and significantly improving degassing efficiency.

The present application provides a portable device and a method for relieving the impact force of a pump station flap, which comprises: an inertia disc for containing fluid sheared with a brake vane, the inertia disc being interference fitted with a fixed shaft of the pump station flap; a surface of the inertia disc facing the pump station flap is concave to form a containing cavity I for containing fluid; a fluid filler receiving box for providing fluid, which is provided with a containing cavity II in communication with the containing cavity I, the volume of the containing cavity II being adjustable; a transmission turntable for driving the brake vane to do centrifugal motion, the transmission turntable being arranged in the containing cavity I of the inertia disc; one end of the brake vane is hinged to a surface of the transmission turntable, and the other end is a free end; a resistance reset unit for prolonging the action time of the brake vane with the fluid and resetting the brake vane in the radial direction; and a sealing plate for sealing the surface of the inertia disc facing the pump station flap. The present application can slow down the impact speed of the pump station flap and reduce the impact force of the pump station flap on the door seat when the pump station flap is closed.

The invention discloses a cavitation risk assessment and correction method and system for a repaired contour of a water pump impeller, and belongs to computer aided design and manufacturing, and the method comprises the steps: generating a difference matrix through point cloud and standard data registration; calling operation data to calculate grid fluid shear and impact values; establishing a load and thickness mapping table according to the three-layer material parameters; constructing a simultaneous inequality group covering the fluid load; screening the thickness ratio solution with the lowest material consumption to generate a repairing instruction; and constructing and outputting a hierarchical repair visualization model. According to the method, the flow field can be actively optimized and cavitation can be inhibited in the repairing stage, and an optimized repairing scheme considering economical efficiency, reliability and hydraulic performance is generated.

The invention discloses a method for preparing nano-cellulose through fluid shear induction, and belongs to the technical field of biomass resource high-value utilization and nano-material preparation, according to the method, bagasse pith parenchyma cells are used as raw materials, cellulose is obtained through screening, delignification and hemicelluloses removal treatment, and N, N-dimethyl formamide containing quaternary ammonium salt type ionic liquid is adopted to prepare the nano-cellulose. The method comprises the following steps: dissolving cellulose in an N, N-dimethylacetamide (DMAC) system, and quickly and controllably regenerating cellulose in a low-concentration urea aqueous solution by virtue of a microfluidic two-channel fluid shearing technology, so as to prepare regenerated nano cellulose. Compared with a traditional regeneration method, the method has the advantages of being small in regeneration liquid consumption, low in energy consumption, simple in process, uniform in product structure, controllable in size and the like, and is suitable for large-scale production and multi-field application.

The present application relates to seawater desalination system equipment technical field, specifically, it relates to the bactericide performance rapid detection device and method for seawater desalination, including flow velocity simulation pipe, the fixed mechanism of setting at its outside, the drive mechanism and injection mechanism of setting in fixed mechanism inside.The bactericide performance rapid detection device and method for seawater desalination, flow velocity simulation pipe connects external water pump to reproduce the fluid shear force and residence time in actual seawater desalination system, injects medicament in dynamic environment through injection mechanism, and cooperates with electromagnetic valve timing collection water sample, so that the bactericide performance data obtained compared with traditional static beaker experiment, more accurate detection medicament in actual seawater desalination pipeline system real effect.

The invention provides an in-vitro cell culture method based on fluid shear force, which is characterized in that in-vitro cell culture is carried out on cells under the action of fluid shear force at a specific temperature and atmosphere similar to the actual temperature and atmosphere of in-vivo cells, the fluid environment of the in-vivo cells can be simulated, and the in-vivo cells can be cultured under the action of the fluid shear force. A guarantee is provided for improving the accuracy and the reliability of an in-vitro cell culture result. According to the in-vitro cell culture method, the in-vitro cell culture device is placed in a culture box with certain temperature and atmosphere for in-vitro cell culture, and the temperature and atmosphere in the culture box are the same as or basically the same as the actual temperature and atmosphere of cells in vivo. The in-vitro cell culture device comprises a rotary stirring device and a clamping device; the rotary stirring device comprises a motor arranged on the rack and a rotary table connected to an output shaft of the motor, and the rotary table extends into the culture dishes; rotating the turntable to rotate and stir the culture solution in the culture dish; the clamping device is used for clamping or loosening the culture dish.

The invention provides an accurate prediction method for metal hydraulic extrusion force. According to the method, on the theoretical basis of a Reynolds equation and a Trichos yield criterion, the fluid power lubrication effect is focused, theoretical analysis of the metal hydraulic extrusion force is carried out, and finally an expression of the metal hydraulic extrusion force is obtained. Based on the Newtonian fluid hypothesis, the dynamic change of the viscosity of the pressure transmission medium along with the pressure and the nonlinear characteristic of the fluid shear force are considered, a hydraulic extrusion force theoretical model closer to the actual physical process is established, and the simplified hypothesis of a traditional model for a fixed friction coefficient is broken through; the effectiveness of the method is verified by tests of tungsten alloy, W6Mo5Cr4V2 high-speed steel and the like.

The invention discloses a jet flow wake three-dimensional flow efficient water pump design method, which comprises the following steps: acquiring three-dimensional flow field simulation data in a water pump flow channel, and simulating a fluid movement track by adopting a computational fluid mechanics method to obtain flow field distribution characteristics; according to the flow field distribution characteristics, an optimized flow channel geometric structure is determined; according to the optimized flow channel geometric structure, new three-dimensional flow field simulation data are obtained, and stable flow field distribution parameters are obtained; according to the stable flow field distribution parameters, fluid shear force data of the surfaces of the key parts are obtained, aiming at a high shear force area, a material database is adopted to match the type of an anti-corrosion coating, whether the thickness of the coating meets the durability requirement or not is judged, and if yes, a coating scheme is determined; and according to the coating scheme, calculating the residual life of the component by adopting a finite element analysis method to obtain a pump body life prediction result. The operation efficiency of the water pump is improved, and energy consumption is reduced; and the service lives of the pump body and core components are prolonged.

The invention discloses a noise reduction type magnetic energy integrated transmission generator set, belongs to the technical field of noise reduction, and aims to solve the problem that in the prior art, a generator set is high in noise during operation, and the noise reduction type magnetic energy integrated transmission generator set is of a structure that a pressing plate is immersed into a non-Newtonian fluid storage tank. The damping characteristic of the system can be automatically changed according to the vibration intensity, the fluid consumes energy during small-amplitude vibration, and thickening and amplitude limiting are achieved during impact. The transverse ribs and the vertical ribs on the bottom face of the pressing plate enhance the fluid shearing and energy dissipation efficiency. The double-layer flange design of the non-Newtonian fluid storage tank forms an anti-leakage barrier. Hinge joint at the bottom of the storage tank allows the storage tank to swing and provides a basis for the triggering mechanism. The buffer column absorbs swing impact of the storage tank. A linkage mechanism composed of a limiting block, a traction spring and a clamping block enables the clamping block to rapidly clamp a vibration source when vibration is too large, and emergency mechanical locking is provided. A triggering mechanism composed of the coupler knuckle, the compression spring and the controller button converts swing into an electric signal to trigger early warning.

The invention provides micron silver powder for electronic paste and a preparation method of the micron silver powder, and belongs to the technical field of metal powder.The preparation method comprises the steps that a silver nitrate solution, an alkaline solution and a reducing agent solution are prepared; under a stirring state at 20-25 DEG C, dropwise adding the silver nitrate solution into the alkaline solution to obtain a mixed solution; under the conditions of 30-35 DEG C and ultrasonic dispersion, a reducing agent solution is dropwise added into the mixed solution, and a silver powder suspension is obtained through a reduction reaction; carrying out solid-liquid separation on the silver powder suspension to obtain a silver powder wet material; and performing fluid shearing cleaning on the wet silver powder, and then performing solid-liquid separation, drying and screening to obtain the micron silver powder for the electronic paste. According to the method, by introducing the synergistic process of gradient temperature control, ultrasonic dispersion, fluid shear cleaning and the like, precise control over the morphology and purity of the silver powder is achieved, so that the micron silver powder which is soft in texture, high in purity, high in sintering activity and excellent in slurry applicability is prepared, meanwhile, the process conditions are mild, and large-scale production is easy to achieve.

The application discloses an industrial air-cooled water chiller and relates to the technical field of air-cooled water chillers; the application forms absolute physical isolation through a branch pipe cooperating with a sealing gasket, ensures that high-pressure water flow and chemical agents only act on a single pre-cooling coil that needs to be cleaned, and eliminates the efficiency loss caused by the shunting of cleaning media in the traditional method; meanwhile, the application completely avoids the pollution of other pre-cooling coils by the scale residues that are stripped off and follow the circulating water; the closed cleaning environment after isolation enables all fluid kinetic energy to be concentrated on a single coil; high-speed jet flow can penetrate deep scale bodies and form a spiral flushing track along the wall of the pre-cooling coil, so that the stripped hard scale can be instantaneously separated from the pre-cooling coil, and the problem of repeated deposition of scale pieces in the traditional flushing process does not occur; bidirectional fluid dynamics realizes the cleaning of the pre-cooling coil wall without any dead angle; after the first round of forward flushing destroys the surface structure of the scale body, the second round of reverse flushing uses fluid shear force to lift the bottom dense scale layer in one piece, and the completeness of the scale body stripping is improved.