149 results about "Surface tension force" patented technology

An electronically actuated droplet delivery device with a mouthpiece for inhaling fluid droplets includes an ejector mechanism having an electronic actuator operably coupled to an aperture plate. A fluid reservoir provided fluid to the ejector mechanism through a surface tension plate that increases contact between the fluid from the fluid reservoir and the aperture plate.

The invention provides a gas-liquid-solid multi-phase conveying centrifugal pump performance prediction method and an optimization design method. According to the method, the performance of the centrifugal pump is accurately predicted and the design efficiency of the centrifugal pump is improved through numerical simulation and optimization design in combination with a gas-liquid-solid three-phase flow dynamic model. Firstly, blade parameters are determined according to design requirements, a three-dimensional model is established, and grid division is carried out; then, the VOF-Level Set multiphase flow model, the particle model and the gas-liquid-solid coupling model are corrected, factors such as surface tension, particle immersion force and drag force are considered, and lift and efficiency curves are calculated through numerical simulation; and finally, a particle accumulation area is analyzed based on the particle distribution characteristic graph, and the optimal lift efficiency combination is obtained by adjusting parameters such as the inlet angle, the inlet width, the wrap angle and the blade number of the blades and optimizing design. According to the method, the performance of the centrifugal pump in the gas-liquid-solid multiphase flow environment can be improved, and a new design thought is provided.

The invention provides an induction melting feeding ultrasonic atomization pulverizing system and method, and belongs to the technical field of metal powder material preparation. The induction melting system is used for melting metal raw materials, generated metal melt is sprayed out through a nozzle and drips on an ultrasonic vibration workbench, inert gas is ionized through a tungsten needle electrode tip in the plasma electric arc melting system, the dripped melt which is not atomized in time and cooled is assisted to continue to be heated, and the molten metal is melted. Under the action of ultrasonic atomization vibration, the melt liquid level is broken to generate a molten pool. And under the action of ultrasonic waves, molten liquid in the molten pool is broken to generate small fog drops, and the fog drops are rapidly cooled under the action of surface tension in the inert gas environment to form the metal spherical powder. Continuous operation of ultrasonic atomization powder preparation can be achieved, the conditions of hollow powder and satellite powder are reduced, and the prepared metal spherical powder has the advantages of being high in sphericity degree (larger than or equal to 0.95), high in compactness (larger than or equal to 99%) and narrow in particle size distribution (smaller than or equal to 60 micrometers).

The invention discloses an oscillation microbubble chip, a separation system and an acoustic manipulation method, the device utilizes the acoustic eddy current effect induced by oscillation microbubbles to realize micro-nano particle acoustic manipulation, the chip structure and operation are simple, the biocompatibility is high, and by designing the chip structure, due to the breathable and water-repellent characteristics of PDMS and the surface tension of fluid, the micro-nano particle acoustic manipulation can be realized. Alternatively arranged equilateral triangle column cavities with different sizes are formed on the side wall of the PDMS microfluidic channel to anchor bubbles. Bubble oscillation is driven by bulk acoustic waves generated by exciting a piezoelectric transducer through a signal generator, symmetrical vortexes are formed on the surfaces of the bubbles through secondary acoustic radiation force generated by bubble oscillation, then large-size particles are captured, and small-size particles flow to an outlet along with flowing under the action of drag force. Gradient separation is adopted to separate small particles from a mixed solution and enrich large particles, enrichment, separation and other control of microparticles are achieved through the acoustic vortex field effect of a specific structure, great potential is achieved in biological research, the structure is simple, the equipment cost is low, and integration is easy.

The invention relates to the technical field of food detection, and discloses a food heavy metal detector and a use method thereof.The food heavy metal detector comprises a rack, a detection unit is installed on the rack, a test tube rack is rotationally connected to the interior of the rack, a plurality of detection tubes are installed in the test tube rack, and a composite discharging assembly is arranged in the rack; the composite discharging assembly comprises two micromotors which are symmetrically installed on the outer surface of the rack, the test tube rack rotates, the test tube rack rotates and vibrates at the same time through a telescopic rod under the action of a balancing weight, so that the discharging purpose is achieved, through the synergistic effect of rotation and vibration, the discharging efficiency is improved, and the working efficiency is improved. The liquid in the detection tube can be more effectively discharged, the liquid can be gathered towards the bottom of the detection tube by rotation under the action of centrifugal force, the surface tension of the liquid and the possible local attachment state can be further broken by vibration, the liquid can flow out more smoothly, and the discharging efficiency and thoroughness are improved.

The invention provides a method for determining the pore diameter lower limit and the effective pore volume ratio of movable fluid. The method comprises the steps that the temperature of each sample under the stratum in-situ condition is calculated according to the ground temperature gradient and the burial depth; correcting the surface tension coefficient of the water by using the calculated temperature; determining an average contact angle of water and shale; calculating capillary force, enabling the capillary force to be equal to reservoir fluid pressure, and calculating the lower limit of the aperture of the movable water; carrying out carbon dioxide adsorption, liquid nitrogen adsorption and mercury injection experiments on the sample to obtain connectivity pore volume-pore size distribution, and calculating effective pore volume in combination with a movable water pore size lower limit; carrying out a low-field nuclear magnetic resonance experiment, calculating the total pore volume of macropores, obtaining the total pore volume of small pores in combination with a carbon dioxide experiment, and finally calculating the total pore volume; and calculating the pore volume ratio of the effective pores by using the pore volume of the effective pores and the total pore volume. According to the method, the evaluation precision of the lower limit of the pore diameter of the shale reservoir movable fluid and the pore volume ratio of the effective pores is effectively improved, and the test cost is reduced.

The utility model relates to the technical field of pipeline groove grinding, in particular to a pipeline groove grinding integrated device which comprises a placing table and a moving table, two inserting grooves are formed in one end of the placing table, connecting blocks are installed and inserted into the two inserting grooves, the connecting blocks are fixedly connected to one end of the moving table, and the moving table is fixedly connected with the placing table. A dust cover is fixedly connected to the top end of the movable table, a booster water pump is fixedly installed at the top end of the dust cover, the output end of the booster water pump is fixedly connected with the top end of a spraying head and internally communicated with the top end of the spraying head, a water inlet is formed in one side of the booster water pump, and the spraying head is arranged at the inner top of the dust cover. And a plurality of universal wheels are arranged at the bottom end of the moving table. According to the device, the booster water pump drives the atomizing spray head to form water mist, dust particles generated by grinding are wetted, the dust particles are bonded into large particles through surface tension of water, sedimentation is accelerated, and dust diffusion is effectively restrained.

The invention relates to the technical field of storage, in particular to a urea solution storage device and a urea solution storage method.The urea solution storage device comprises a tank body, the tank body is composed of a cylindrical barrel and a conical bottom, a liquid discharging pipe is arranged at the lowest point of the conical bottom, and the urea solution storage device further comprises a stirring mechanism and a liquid discharging mechanism, an upper discharging mechanism is coaxially arranged in the hollow pipe; and an aeration mechanism. A high-concentration area and a low-concentration area in the tank body can be mixed to form radial diffusion, so that urea molecules are uniformly dispersed, local concentration supersaturation is avoided, and the device can be regularly started and used in the storage tank; in the synchronous stirring process, the liquid is sucked from the bottom of the hollow pipe and diffused to the periphery from the top of the hollow pipe, so that an axial circulating flow field is formed, and no stirring dead zone exists in the tank body; the aeration mechanism is arranged, released bubbles can generate disturbance in the rising process, the surface tension of the solution is destroyed, the shearing force generated when the bubbles are broken can disperse tiny crystal particles, and the crystal particles are prevented from being agglomerated.

The invention relates to the field of electrolyzed water oxygen evolution reaction, and particularly discloses a preparation method of an oxygen evolution electrode for promoting bubble removal through cooperation of double Laplacian forces. A microscopic nanocone catalyst layer structure is grown on foamed nickel in an electro-deposition mode, a discontinuous three-phase interface is formed by means of the morphology to reduce bubble adhesive force, and under the simultaneous action of Laplace force generated by a microscopic V-shaped structure, microbubbles are promoted to be desorbed from the surface of a catalyst layer and leave a reaction area. A macroscopic gradient hole array is constructed on foamed nickel, and hydrophobic coatings are coated in holes, so that a hydrophobic and aerophilic effect is presented in the holes, gas in a reaction area is induced to gather towards a hydrophobic and aerophilic hole area under the action of surface tension, and the Laplace force generated by a gradient hole macroscopic V-shaped structure is utilized to promote rapid and directional transmission and removal of bubbles.

The invention relates to the technical field of processing and conveying equipment, in particular to a functional conveying device for carton gluing processing, which comprises a conveying workbench, a limiting frame fixed at the top end of the conveying workbench and a conveying assembly fixed in the limiting frame. When the conveying device is used, gluing position roughening operation can be carried out before gluing of the inner wall of a paper box, the gluing effect can be remarkably improved, the contact area is increased, the adhesive force and the bonding strength are improved, meanwhile, the surface energy is reduced, and the service life of the paper box is prolonged by increasing the surface roughness of the inner wall of the paper box, forming a microscopic concave-convex structure and generating mechanical interlocking after glue solidification. The surface tension influence is reduced, the glue solution is uniformly spread, various glue types are adapted, the stress is dispersed when the glue solution is stressed, the structural stability is enhanced, the environment resistance is improved, meanwhile, the roughly-ground inner wall is coated with glue, the contact area can be increased, the adhesion stability is improved, and drooping caused by glue accumulation is avoided.

The present invention discloses a solid-liquid coupling simulation method with surface tension effect based on the material point method, belonging to the fields of computer graphics and physics-based simulation. The system used in the simulation method includes solid model modeling, fluid model modeling, Level Set implicit surface construction, Marching Cubes display surface construction, surface particle resampling, and collision detection. The system simulates fluids and solids on the basis of the material point method, constructs Level Set to resample fluid surface particles, and adds surface tension to the fluid using the CSF model. Different background grids are used to simulate fluids and solids respectively to solve the inherent adhesion phenomenon during MPM solid-liquid coupling and achieve the slip contact effect during solid-liquid coupling. Finally, the coupling phenomenon of incompressible fluid with surface tension effect and nonlinear elastic solid is realized.

The present application discloses a cleaning device and an electroplating device. The cleaning device is configured to clean an electroplating chuck, and comprises a tank body and a pipe assembly; the tank body comprises an inner tank and an outer tank, the inner tank is configured to contain a cleaning liquid, and the outer tank is provided at the periphery of the inner tank and is configured to collect the cleaning liquid overflowing from the inner tank; the pipe assembly comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is connected to the inner tank and is configured to supply the cleaning liquid to the inner tank, and the liquid outlet pipe is connected to the outer tank and is configured to discharge the cleaning liquid from the outer tank. The electroplating chuck has a first portion to be cleaned, and said first portion is located at the bottom of the electroplating chuck. When the electroplating chuck is cleaned, said first portion is located at the opening of the inner tank, so that the cleaning liquid overflowing from the inner tank cleans said first portion under the action of surface tension. By means of the surface tension of the cleaning liquid overflowing from the inner tank, the electroplating chuck is cleaned efficiently, and splashing and dripping of the cleaning liquid into an electroplating chamber of the electroplating device are effectively reduced or even avoided.

The invention belongs to the technical field of demisting, and particularly relates to an integrated baffling demister which comprises two supporting frames, a corrugated plate is fixedly connected between the two supporting frames, a deflecting sheet is fixedly connected to the side wall of the corrugated plate, the corrugated plate and the deflecting sheet are used for trapping entrainment in gas, and the corrugated plate is of a multi-deflecting structure; according to the demister, the opportunity that entrainment is captured is increased by utilizing the multi-fold structure of the corrugated plate, when gas containing the entrainment flows through the demister at a certain speed, due to the inertial impact effect of the gas, the entrainment collides with the corrugated plate, and gathered liquid drops are large until the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of liquid, so that the entrainment is captured. The liquid drops are separated from the surfaces of the corrugated plates, and a plurality of integrated baffling demisters provided by the invention can be welded and combined into various shapes according to requirements.

The utility model relates to the technical field of storage tank product testing equipment, in particular to a surface tension storage tank overturning testing device, which is characterized in that the upper end of a first supporting seat is in shaft connection with a supporting table, the upper wall of the supporting table is fixedly connected with a bearing inclined plate, the upper wall of the supporting table is movably provided with a clamping plate main body, and the lower end of the clamping plate main body is fixedly connected with a sliding block main body; the sliding block body is slidably connected with the inner wall of the open groove in the upper end of the supporting table, the inner wall of the sliding block body is in threaded connection with a threaded rod, one end of the threaded rod is fixedly connected with a motor, and one end of the second supporting base is fixedly connected with a control motor. The fixing effect is guaranteed, and the problem that the accuracy of test data is affected due to the fact that an existing overturning test device is difficult to match with various surface tension storage tanks of different models and is prone to shaking or shifting in the overturning process is solved.

This invention relates to a method for calculating the restoring force caused by the surface tension of liquid fuel in a storage tank: A ground-based scaled-down storage tank control group is constructed, comprising three sets of scaled-down storage tanks, with each set consisting of two tanks filled with different test solutions; a ground swaying test is conducted on the ground-based scaled-down storage tank control group, and the first-order swaying fundamental frequency is recorded; the first-order resonance process of each ground-based scaled-down storage tank in the ground swaying test is equivalent to that of a simple pendulum model; and the gravitational acceleration g between the control groups formed by the same scaled-down storage tank radius and different test solutions is calculated. mn Based on the proportional relationship between the internal liquid surface tension and the equivalent acceleration generated by the internal liquid surface tension, the equivalent acceleration generated by the internal liquid surface tension of the scaled-down tanks in various locations is calculated. According to the principle that the liquid-filled tank of the spacecraft is proportional to the Bond number of the on-orbit environment, the equivalent acceleration generated by the internal liquid surface tension under the actual on-orbit operating conditions is extrapolated, and then converted into the restoring force caused by the surface tension of the liquid fuel inside the tank.

The provided method includes: determining an energy parameter and a co-volume parameter of a pure gas by a PR state equation, and determining a material parameter and a co-volume parameter of a mixed gas by a Waals one-fluid mixing rule and a combination rule; determining a Helmholtz free energy density and an equilibrium density of the pure gas by a Wertheim molecular association theory, and determining Helmholtz free energy and an equilibrium density of a (H2+N2) mixed gas with different components by a density mixing rule; determining an influence parameter of the pure gas by a gradient theory (GT), and determining an influence parameter of the mixed gas by the influence parameter of the pure gas and an interaction coefficient; simplifying a GT model; and obtaining the surface tension of the (H2+N2) / H2O system at different temperatures by combining the LGT model and the PR state equation.

The invention provides a management device for small plate type storage PMD, and particularly belongs to the technical field of gas-liquid separation. A large blade assembly and a small blade assembly both adopt vertical blades, the blades adopt a plug-in type mounting structure, the principle that surface tension drives liquid under microgravity is utilized, a plate type liquid management technology is adopted, and the surface tension of the liquid is utilized to complete transmission and storage of the liquid, and the blades are designed into middle hollow structures and small blades. The structure weight is reduced, the liquid storage function under microgravity is achieved through the combination of the two parts, and therefore liquid drainage without gas filling is achieved, shaking of liquid can be restrained, the overall structure is optimized, the weight is reduced, the structure is simple, and reliability is high. The device comprises a large blade assembly and a small blade assembly, and further comprises a blade positioning shaft and a liquid collector assembly, the large blade assembly is composed of a first large blade and a second large blade, and the small blade assembly is composed of a first small blade, a second small blade, a third small blade and a fourth small blade.

The invention relates to the technical field of college physics experiment devices, and discloses a liquid viscosity coefficient and surface tension coefficient measurement comprehensive experiment instrument, which comprises a test bed, a first square column container, a second square column container, a timing automatic release device, a force sensor, a metal circular ring, an industrial camera matched with a telecentric lens, a lifting platform and a host. According to the invention, two original experimental devices are combined into one, so that the cost is saved, and the laboratory space is also saved; by designing the timed automatic release device, manpower is saved, and errors caused by manual operation of an original experimental instrument can be reduced; and the instantaneous speed of the small ball on the falling path is measured by using a machine vision technology, so that the selection basis for selecting the constant-speed motion interval of the small ball can be explored.

The invention discloses a surface tension coordinated regulation and control high-strength dense net underwater explosion jet flow suppression protection device and a use method. A selective permeable barrier is constructed through a high-strength dense net, surface tension of an interface is used for cooperatively and selectively permeating a water phase, blocking a gas phase from passing, breaking symmetrical expansion of bubbles and inducing energy to be dissipated in a capillary wave form, and the surface tension and multi-layer array configuration are adjusted by combining real-time adjustment of mesh tension and a dense net structure; the formation of high-speed jet flow is inhibited; and collapse energy is dispersed. The limitation that traditional protection only weakens shock waves is broken through, double inhibition of bubble pulsation and jet flow can be achieved, and the device has the advantages of light weight and modular deployment and has important popularization value in military and engineering scenes such as submarines and underwater facilities.

The invention discloses a use method of a device for treating dust and harmful gas pollution by targeted fluid, belongs to the field of mine safety production, and is characterized by providing a device for treating dust and harmful gas pollution by utilizing aerodynamic force and water particle swarm interface relative motion to generate surface tension change and interface polarity effect. Through targeted regulation, the new water particle swarm fluid has stronger charge force for adsorbing gas or Marangei force for adsorbing tiny dust during movement, so that harmful gas and dust in a limited space are effectively treated at the same time; according to the application method of the device, the problem of treatment of coexistence of 0.01-1 micron dust and harmful gas in the industrial production process is effectively solved, the device used in the method is simple in structure, convenient to operate, obvious in treatment effect and high in efficiency, and the device plays a role in protecting safe production of mines.

To provide a method and a device for estimating floating droplet surface tension, which enable accurate estimation of surface tension of a floating droplet using the flotation technique even when the floating droplet is not truly spherical due to an external force required for flotation.SOLUTION: A floating droplet surface tension estimation method for estimating surface tension of a floating droplet is provided, the method involving correcting surface tension derived on the basis of a vibration frequency of the floating droplet using a correction equation including variables based on an external force applied to the floating droplet.SELECTED DRAWING: Figure 1

The invention provides a method for rapidly predicting the surface tension of a foam extinguishing agent on site, which comprises the following steps: S1, collecting the surface tension of different types of foam extinguishing agents under different temperature conditions; s2, taking the first surface tension and the temperature measured by the thermocouple as input data, and taking the second surface tension as output data; s3, establishing a machine learning model; s4, after the model parameters are initialized, establishing a mapping relation between the input data and the output data; s5, the first surface tension and the temperature are collected again to serve as input data, and the machine learning model is adopted to predict data of the second surface tension. According to the method, the maximum bubble pressure method is improved based on high-speed camera shooting and image recognition, temperature compensation and a machine learning model are combined to predict the surface tension of the foam extinguishing agent on the fire extinguishing and rescue site, and the requirements that on-site surface tension measurement operation is convenient, the device structure is simple, and the surface tension measurement result is high in accuracy can be met.

The invention discloses an absolute measurement method and device for the density of molten salt and solution, and belongs to the field of molten salt physical property tests.The measurement method comprises the steps that 1, a cone and cylinder composite heavy hammer is adopted to measure the density of the molten salt or solution; 2) arranging two measuring positions on the cylinder section of the heavy punch, taking the section between the two measuring positions as a middle measuring section, the length of the middle measuring section is equal to the distance between the two measuring positions, the diameter of the middle measuring section is equal to the diameter of the cylinder of the heavy punch, and measuring at the two positions in sequence; (3) the density of the fused salt or the solution is determined by the volume of the middle measuring section of the heavy hammer and the buoyancy borne by the middle measuring section, so that the density of the fused salt and the solution is deduced; according to the method, a long-distance microscope system is adopted to directly measure the thermal expansion of the heavy hammer at high temperature, calibration by a standard substance is not needed any more, when the method is adopted to measure the density of the fused salt and the solution, the volume of the heavy hammer does not need to be calibrated, additional force caused by surface tension is completely removed, the measurement process is greatly simplified, and the measurement precision is improved.

The utility model discloses an air control liquid level type liquid surface tension coefficient measurement experimental device which comprises a bottom plate, a vertical rod, a vertical column, a transverse rod, a force sensor, a tray and glassware, wherein the vertical rod and the vertical column are mounted on the bottom plate; the transverse rod is adjustably mounted on the vertical rod; the force sensor is mounted on the transverse rod; the device is characterized in that a glass bottle is connected to the glassware; and the glass bottle is connected with a pressure balloon for controlling the liquid in the glassware to rise and fall and a deflation valve arranged on the pressure balloon. By adjusting the deflation valve on the pressure balloon, the pressure in the glass bottle is reduced during deflation, and liquid in the glassware flows back into the glass bottle, so that the liquid level in the glassware stably descends, the liquid level does not fluctuate during descending, the measurement accuracy is improved, and the measurement repeatability is good; liquid in the glassware and the glass bottle can be replaced through the tee joint with the valve, so that different liquids can be conveniently replaced for experiments, the experiment range is expanded, and the environment is not polluted.

The utility model discloses a high-speed winding machine with a pressing function, which relates to the technical field of high-speed winding machines and comprises a supporting mechanism, a driving mechanism is rotatably arranged in the supporting mechanism, an adjusting and pressing mechanism is arranged at the upper end of the supporting mechanism, a winding mechanism is movably arranged at one end of the supporting mechanism, and a pressing mechanism is arranged at the other end of the supporting mechanism. The winding machine solves the problems that an existing winding machine is not provided with a pressing mechanism, the surface tension of a thin film cannot be kept constant, and appropriate pressure needs to be applied to the electrostatic film, the winding mechanism and the clamping assembly are arranged in a matched mode, one end of the elastic assembly is attached to the winding mechanism, elastic pressing during winding of the winding mechanism is achieved, and the winding machine is convenient to use. The surface tension of the film is kept constant, the driving mechanism and the winding mechanism are arranged in a matched mode, the driving mechanism drives the electrostatic film to be wound, the winding mechanism applies pressure to the electrostatic film through the elastic assembly, and the structure prevents the electrostatic film from loosening and inclining.

The utility model provides a liquid surface tension measurement experiment instrument which comprises a base and an electric box, a precise lifting fine adjustment device and a stand column are installed on the base, a glassware base is installed above the precise lifting fine adjustment device, a leveling level is connected to the glassware base, and a glassware is arranged on the glassware base. A limiting nut is installed at the top end of the stand column, a limiting ring is installed on the stand column, a sensor support is arranged between the limiting ring and the limiting nut, and a locking hand wheel is installed on the sensor support. A force sensor is installed at the front end of the left side of the sensor support and connected with a force sensor connecting line, the force sensor is covered with a protective outer cover, a force sensor hook is installed at the bottom of the protective outer cover, and a sample connecting filament is connected to the bottom of the force sensor hook. The utility model relates to the field of liquid surface tension measurement, and has the advantages of high precision and large lifting range by adopting precise lifting fine adjustment, so that the experiment operation is more convenient.

The utility model discloses a de-foaming device for adhesive production, which comprises a de-foaming mechanism, the de-foaming mechanism comprises a shell, a motor is fixedly connected to a middle shaft of the top of the shell, the output end of the motor is fixedly connected with a stirring roller, and the top of the surface of the stirring roller is fixedly connected with a driving gear. According to the defoaming device for adhesive production, the defoaming mechanism is arranged, gas in an inner cavity of a shell is pumped out through a first one-way valve and an exhaust pipe in the process that a sealing disc moves towards the left side, gas in an inner cavity of a connecting cylinder is exhausted in the process that the sealing disc moves towards the right side, and the inner cavity of the shell is vacuumized through reciprocating work; the pressure of the inner cavity of the shell can be reduced, bubbles in the adhesive are expanded and escaped in a low-pressure environment, when the pressure is reduced, the solubility of dissolved gas in liquid is also reduced, the bubbles move from the interior of the adhesive to the surface, and the bubbles are broken under the action of surface tension, so that the aim of defoaming is fulfilled.

The present application relates to the technical field of atomization numerical simulation, and relates to an atomizer atomization numerical simulation method and system based on temperature variation characteristics, which comprises the following steps: confirming a test atomizer set and an ambient temperature set, obtaining a plurality of normal liquid viscosity sets and a plurality of normal liquid droplet surface tension sets, obtaining an optimized temperature interval, constructing a viscosity surface tension momentum equation, setting a solver parameter, sequentially extracting an optimized temperature value from the optimized temperature interval, simulating a pre-constructed simulation atomizer according to the solver parameter, the optimized temperature value and the viscosity surface tension momentum equation, obtaining a simulation atomization parameter, otherwise, taking the simulation atomization parameter as an optimized atomization parameter, summarizing the optimized atomization parameters, obtaining an optimized atomization parameter set, obtaining an optimal atomization parameter, and completing the atomizer atomization numerical simulation based on the temperature variation characteristics based on the optimal atomization parameter. The present application can improve the performance and atomization effect of the atomizer.

The invention relates to a use method of a multi-element composite dust removal device for a mine underground main roadway, and belongs to the field of dust treatment of the mine underground main roadway, and is characterized in that a surface tension change and an interface polarity effect are generated through relative movement of aerodynamic force and a water particle swarm interface; a plurality of fluid dust removal units are arranged on the section of a main roadway, and particle swarm fluid generated by each fluid dust removal unit is compounded into full-section particle swarm fluid, so that dust in the main roadway cannot generate a drilling-out effect; according to the using method of the device for applying the gas atomization dynamic fluid to the aerosol-form dust, the device adopted by the method is simple in structure, convenient to operate, obvious in treatment effect and high in efficiency, and the device plays a role in protecting safe production of mines.

The utility model relates to technical field of compressor production, specifically relates to a device for welding of compressor upper and lower cover circumference, it includes frame, deflection device, clamping device, welding torch, welding torch moving device, welding torch cleaning device, clamping device is located on deflection device, welding torch sets up on welding torch moving device deflection device, welding torch cleaning device, welding torch moving device all set up on the frame, the utility model passes through using the single welding torch of immovable position, utilizes the mode of workpiece rotation and carries out welding, can weld the high -quality weld. And the workpiece is placed in the inclination, in the welding process, the welding fluid will flow along the junction of upper and lower cover circumference and fill it due to the action of gravity and the action of liquid surface tension, will make the weld internal density uniform after welding, and the weld is not easy to collapse due to uneven stress. Through setting up the welding torch cleaning mechanism, the welding torch is cleaned and lubricated after working for a period of time can prolong the service life of the welding torch and improve production efficiency.