1083 results about "Jet (fluid)" patented technology

The invention provides a fluid-structure interaction vibration simulation and suppression method for a water-jet propeller, and belongs to the field of numerical simulation of computational fluid mechanics. The method comprises the following steps: establishing a finite element model of a water-jet propeller impeller-shafting coupling system; performing dry mode and wet mode comparative analysis on the finite element model by utilizing a finite element method, and verifying the effectiveness of the model; dividing finite element grids of a structural domain and a flow field domain; establishing a fluid-solid coupling model; on the basis of bidirectional fluid-solid coupling numerical calculation, the flow field speed and acting force are solved through CFD, the structure movement speed and displacement are updated, a flow field grid is further updated, flow numerical calculation continues to be conducted, and iteration is conducted till the simulation time ends; flow-induced vibration characteristics are analyzed through post-processing, and the vibration amplitude is restrained by adjusting the mass center position of the impeller airfoil. According to the method, the bidirectional fluid-solid coupling model of the impeller-shafting system of the water-jet propeller is constructed, structural deformation and transient flow field information are directly associated, and the hydrodynamic performance is improved.

The invention relates to a control system for a water-jet loom. A data acquisition module acquires and transmits weft tension, humidity and temperature data in real time. The parameter calculation module calculates the optimal parameters of the water spraying time, the water pressure and the nozzle opening degree through a fuzzy control algorithm according to data changes and transmits the optimal parameters to a water spraying execution mechanism. The tension adjusting module adjusts the nozzle opening degree and the water spraying time according to the comparison result of the weft yarn tension and the preset threshold value. The nozzle optimization module optimizes the nozzle design by means of a computational fluid dynamics approach. The pressure adjusting module monitors pipeline pressure through a pressure sensor, and alarms and adjusts the rotating speed of a water pump and the opening degree of an electromagnetic valve if the pipeline pressure exceeds a threshold value. The state detection module monitors knitting needles and shuttles through the machine vision technology, and water spraying parameters are adjusted when abnormity occurs. The data processing module uploads data to a cloud platform, and big data and machine learning are utilized to optimize a control strategy so as to realize real-time monitoring and accurate control of various parameters of the water-jet loom and guarantee weaving quality and efficiency.

A multi-scale coupling analysis method for a high-temperature liquid metal and jet water interaction system mainly comprises the following steps as shown in an attached drawing: 1, carrying out geometric modeling and grid division on a liquid metal pool type space, jet water and other pipeline systems, and setting a valve action sequence; 2, setting a coupling boundary, and establishing an IPC communication pipeline; 3, performing steady-state calculation, and mutually providing initial boundaries for overall initialization; 4, a system program is imported into the boundary of the two-dimensional fluid domain, the fluid state in the pipeline under the decompression heating condition is calculated, and boundary information in a result is written into the IPC pipeline; 5, the two-dimensional fluid program reads source items from the system program, thermodynamic parameter distribution of the molten pool is calculated, and boundary information is provided; and 6, judging the action condition of the component at the current moment and repeating the step 4 and the step 5 until the calculation time reaches the end moment. The method provided by the invention can simulate the whole interaction process of liquid metal and jet water and embody the influence of flash evaporation in a critical flow jet boundary and an injection pipeline on jet.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by jetting a fluid onto the hull or surface continuous with hull at a location above the waterline in the vessel. The Coanda flow extends below the waterline, entraining air below the waterline and adjacent to the hull. The Coanda flows generated by the free jets impacting targets embedded in wear plates can be created in any direction relative to the vessel forward direction. An air cavity is also created by the jetted fluid. A system for reducing drag is also disclosed, wherein the system includes a pump in fluid communication with a source of fluid, power source connected to the pump and at least one nozzle positioned above the waterline of the vessel and oriented towards the hull of the vessel so as to jet the fluid thereon.

The invention relates to the technical field of radiators, and particularly discloses a micro-channel radiator for multiple hot spots, which comprises a radiating main body, a rectangular frame edge and a jet liquid inlet partition plate, and is characterized in that the radiating main body is arranged in the rectangular frame edge, and the jet liquid inlet partition plate is arranged on the upper surface of the radiating main body; a jet flow heat exchange cavity is formed in the upper end of the heat dissipation body, a jet flow liquid separation plate is arranged at the upper end of the jet flow heat exchange cavity, jet flow holes are formed in the jet flow liquid separation plate, a jet flow liquid collection cavity is formed between the jet flow liquid separation plate and a jet flow liquid inlet partition plate, and a jet flow area baffle is arranged at the lower end of the jet flow liquid separation plate. The lower end of the side wall of the jet flow heat exchange cavity is provided with a jet flow micro-channel arranged outwards. The double-liquid-inlet design is adopted, two heat exchange modes of jet flow cooling and cross flow cooling are combined, and the heat dissipation efficiency is improved; through the jet flow liquid distribution plate and the jet flow area baffle, accurate distribution and targeted flow adjustment of fluid are achieved, and the heat dissipation uniformity and the temperature uniformity are effectively improved.

The invention discloses a CFD (computational fluid dynamics) simulation-based magnetofluid jet shear polishing device and method. The device comprises an industrial five-axis machine tool, a fluid circulation system, a jet polishing module and a CNC (computer numerical control) system. The jet flow polishing module and the machined workpiece 8 are installed on a workbench and a tool installation base of the industrial five-axis machine tool respectively, and five-axis polishing machining can be achieved under the control of a CNC numerical control system. The jet flow polishing module comprises a jet flow tool head and a rotating magnetic field generating device. The rotating magnetic field is applied to the jet flow outlet of the jet flow tool head, ferroferric oxide particles in the polishing solution are driven to be arranged in the magnetic line direction to form a chain structure, the viscosity of the polishing solution is remarkably improved, and the polishing solution is endowed with the high-speed self-rotating motion characteristic. High-speed rotation and enhanced viscosity of the liquid column generate stronger shearing force, so that efficient material removal on the surface of a workpiece is realized.

A valve system includes at least one spin chamber having an outlet drain configured to allow flow out of the spin chamber. A main spin surface of the at least one spin chamber is defined around the outlet drain. A directional jet system is in fluid communication with the at least one spin chamber. The directional jet system includes a plurality of members each is configured to move between a first position for directing a tangential flow around the drain of the at least one spin chamber and a second position for directing a radial flow toward the drain of the at least one spin chamber.

An arrangement and a method for preventing collection of debris on or for removing debris, such as cuttings, from the top of a closed riser sealing device (215) in a subsea riser (1). The arrangement comprises a flushing line and at least one flushing fluid inlet (294) to direct a jet of flushing fluid into said riser (1). The inlet (294) directs flushing fluid into a space in the riser (1) immediately above said closing element. The invention also relates to a swirl element (351) located immediately above the riser sealing device (215) and being rotationally coupled to a drillstring (11).

The invention discloses a jet fluid pushing type self-guiding drill bit which comprises a drill bit assembly, a drilling part, a gauge protection part and a drill body part which are sequentially connected, a blade and a drilling nozzle are arranged on the drilling part, a plurality of pushing nozzle rows are arranged on the gauge protection part at intervals in the circumferential direction, each pushing nozzle row comprises at least one pushing nozzle, and the drilling body part is provided with a plurality of pushing nozzles; a drilling fluid flow channel communicated with the drilling nozzle and the pushing nozzle is formed in the drill bit assembly; the rotary inner cylinder is arranged in the drilling fluid flow channel of the gauge protection part, an overflowing hole row is formed in the side wall of the rotary inner cylinder, and the overflowing hole row comprises at least one overflowing hole; the measurement and control assembly is arranged on the drill body part in a sealed mode, and the measurement and control assembly comprises a near-bit measurement module, a data processing module, a regulation and control module and a power module; and the regulation and control module can control the rotary inner cylinder to rotate to a target position relative to the drill bit assembly based on real-time parameters obtained by the near-bit measurement module, so that the drill bit assembly can drill and deflect in the target drilling direction under the counter-acting force of the jet flow of the jet flow liquid pushing the well wall.

The invention relates to an array type underwater propeller with high maneuverability and low energy consumption, a pump jet generating device and a flow divider jointly form a propeller front end, an intelligent fluid director forms a propeller rear end, and the pump jet generating device drives an impeller through a rotating motor to drive surrounding water flow to rotate to generate a main jet flow; an isolation structure is arranged in the flow divider and used for evenly dividing the main jet flow into multiple strands of independent sub jet flows, and all the sub jet flows form propelling power after entering the intelligent flow guider to be guided. The intelligent fluid directors are connected with the flow channels of the flow divider in a one-to-one correspondence mode and used for converting fluid flowing out of the flow divider and out of the jet flow face into effective action jet flow with the adjustable flow speed. The intelligent fluid director comprises a jet flow end regulation and control mechanism and a pressure relief end regulation and control mechanism, and the jet flow end regulation and control mechanism is used for independently regulating the flow speed of effective jet flow ejected from the fluid director; and the pressure relief end regulation and control mechanism is used for maintaining the constant flow velocity at the inlet of the fluid director by releasing part of water flow when the effective jet flow velocity is regulated.

The invention discloses a ground negative pressure feeding system for water inrush closure and plugging of a deep-buried tunnel. The ground negative-pressure feeding system comprises a pipeline, an adjustable-speed jet flow pump, a directional roadway-penetrating drill hole sleeve and a hopper, a directional roadway-penetrating drill hole communicated with a water gushing tunnel is formed in the ground, a second end of the directional roadway-penetrating drill hole sleeve is inserted into the directional roadway-penetrating drill hole and communicated with fluid of the water gushing tunnel, the adjustable-speed jet flow pump is arranged on the ground, and a second end of the directional roadway-penetrating drill hole sleeve is inserted into the directional roadway-penetrating drill hole and communicated with fluid of the water gushing tunnel. The water outlet end of the speed-adjustable jet flow pump is connected with the first end of the pipeline, and the second end of the pipeline is connected with the first end of the directional roadway penetrating drilling sleeve. According to the system provided by the invention, by optimizing the flow speed and the mixing proportion of the water flow carrying the gravel aggregate, the common problems of hole blockage, air column formation and the like in a traditional feeding mode are effectively avoided, and the aims of high efficiency, safety and economy of emergency treatment of water inrush of the deep-buried tunnel are achieved.

The invention relates to an ultrasonic atomization pulse type cold air jet cooling and lubricating device and an operation process thereof. The device comprises an air compressor, a cold air generator, a gas storage tank, a pulse control valve and an ultrasonic atomization nozzle module which are sequentially connected through a gas pipeline. The ultrasonic atomizing nozzle module comprises an ultrasonic transducer, a stepped amplitude-variable rod, a waterproof cover, a sealing cover and a focusing nozzle. In the working process, the stepped amplitude-variable rod amplifies the high-frequency mechanical vibration amplitude of the ultrasonic transducer, and cutting fluid is efficiently atomized into micron-sized liquid drops through the cavitation effect and the capillary wave effect; meanwhile, the cold air generator converts high-pressure air provided by the air compressor into low-temperature gas and temporarily stores the low-temperature gas in the gas storage tank, and the low-temperature gas is released in a pulse mode through the precise pulse control valve according to the set frequency and duty ratio. The pulse low-temperature gas enters the sealing cover to be fully mixed with the atomized liquid drops, uniform gas-liquid two-phase jet flow is formed, finally, the jet flow is accelerated by the focusing nozzle to form high-speed convergent jet flow, the high-speed convergent jet flow acts on a cutting area accurately, and pulse type efficient cooling and lubricating cutting machining is achieved.

The invention relates to the technical field of jet milling, in particular to a jet milling control method for a fluidized bed jet mill. The method comprises the following steps: acquiring the scattered particle weight increment of large particles and the fine weight increment of fine particles between adjacent sampling moments; dividing into an initial increasing stage and a uniform increasing stage according to the numerical value change of the weight increment of the scattered particles at the maximum value position; in the initial increasing stage, the retention degree is determined according to the trend change of the small weight increment; the drag force degree is determined according to the numerical comparison of the fine weight increment and the granular weight increment in the initial increasing stage and the uniform increasing stage; and determining an adjustment coefficient of the jet milling pressure by combining the retention degree and the drag force degree at the current moment, and regulating and controlling the jet milling pressure at the current moment according to the adjustment coefficient. The airflow crushing pressure can be adjusted and controlled more objectively and reasonably, and the airflow crushing efficiency is effectively improved.

The invention belongs to the technical field of fluid mixing heat exchange, and particularly relates to a low-flow-resistance jet spray type liquid cooling low-temperature gas supply device and application thereof. Comprising a gas diversion system and a liquid supply system; the gas diversion system comprises a pre-cooling pipeline and a hemispherical diversion structure arranged in the pre-cooling pipeline; the precooling pipeline comprises an air inlet and an air outlet; the liquid supply system is arranged around the gas inlet end of the pre-cooling pipeline, communicates with the pre-cooling pipeline through a nozzle system arranged in the circumferential direction and is used for spraying liquid nitrogen into the pre-cooling pipeline so as to cool gas to be cooled; the hemispherical flow guide structure is arranged at the air inlet end of the pre-cooling pipeline, and the spherical face side of the hemispherical flow guide structure faces the air inlet and is used for guiding sprayed liquid nitrogen. In the working process, the temperature uniformity and the total pressure recovery coefficient are high, and the temperature distortion rate is low.

The invention relates to the technical field of aircraft control, in particular to an airfoil gust retarding feedforward control method based on a circular rector control technology, which comprises the following steps: modifying the shape of the rear edge of an NACA0012 airfoil, and arranging jet holes in the rear edge to form a circular rector control airfoil; performing a fluid simulation experiment on the circular rector control airfoil based on the gust speed, and constructing a model of the airfoil lift coefficient disturbed by the gust speed; performing a fluid simulation experiment on the circular rector control airfoil based on the jet flow momentum coefficient, and constructing a model of which the airfoil lift coefficient is controlled by the jet flow momentum coefficient; based on the model, obtaining a gust slowing-down feedforward control model of which the input quantity is the vertical gust speed and the output quantity is the jet flow momentum coefficient; controlling jet flow of a trailing edge by adopting the gust slowing-down feedforward control model to complete gust slowing-down control of the circular rector control airfoil; the method can improve the ability of the aircraft to resist the gust disturbance environment.

A system and method for enhancing marine vessel efficiency through integrated hull optimizations is disclosed. The system includes automated bow thruster covers that reduce hull drag and condition water flow, coupled with strategically positioned air lubrication nozzles that create and maintain an air layer under the vessel. The bow thruster covers may be configured as circular doors or parallel panels, optionally incorporating air discharge ports or working in conjunction with dedicated air jets. An intelligent control system optimizes the integrated components using real-time sensor data and computational fluid dynamic analysis. The system modulates air distribution and cover positions based on sea conditions and vessel speed, maintaining optimal efficiency during operation. External surfaces may incorporate superaerophilic structures to enhance air retention and reduce drag. The comprehensive integration of these components provides improved hydrodynamic efficiency while maintaining full bow thruster functionality when required.

The invention relates to the technical field of micron-sized jet flow and uniform atomization, in particular to a monodisperse uniform fog drop device and an atomization spray head spray hole array arrangement method, and the monodisperse uniform fog drop device comprises a driving source, a liquid supply device and a spray head; the spray head is a monodisperse atomizing spray head, the driving source is an ultrasonic signal generating system, the liquid supply device supplies constant-pressure fluid to the spray head, and the spray head forms monodisperse spray under the driving of high-frequency sound waves of the ultrasonic signal generating system; the spraying hole array arrangement method of the atomizing nozzle comprises the following steps of: setting smaller spraying hole spacing in small deformation areas close to the center of the spraying hole plate and constraint ends on two sides of the spraying hole plate; a large safety distance is arranged in a large deformation area between the restraining end of the spray orifice plate and the center of the spray orifice plate, so that intersection caused by jet flow intersection is prevented. According to the device and the arrangement method, the problems of mutual interference and the like between large-scale array jet flows are solved; the controllability of the size and the speed of the monodisperse atomized liquid drops can be effectively improved, so that macro micro liquid drops with uniform size and concentrated speed are generated.

A negative pressure controllable dry powder variable-viscosity fracturing fluid mixing device relates to the technical field of petroleum engineering equipment and comprises a powder hopper, a negative pressure pipe, a jet pipe, a primary mixing tank and a defoaming tank, the bottom of the powder hopper can be communicated with the negative pressure pipe, the negative pressure pipe serving as a branch is connected with the jet pipe, one end of the jet pipe is connected to a fracturing fluid source, the other end of the jet pipe is connected with the primary mixing tank, and the defoaming tank is connected with the primary mixing tank. A stirring system is arranged in the primary mixing tank, a defoaming partition plate for completely dividing the internal space of the defoaming tank into two parts is arranged in the defoaming tank connected with the primary mixing tank, a plurality of groups of through holes communicated with the two parts are formed in the defoaming partition plate, and a bubble guide pipe communicated with the part where the liquid inlet is located is arranged at the top of the defoaming tank; a bubble containing cavity is formed in the top of the bubble guide pipe, and a liquid outlet communicated with the part not connected with the liquid inlet is further formed in the bubble removing tank. According to the utility model, high-stability bubbles generated by the influence of polymers in the variable-viscosity fracturing fluid can be effectively removed, and the preparation effect of the variable-viscosity fracturing fluid is ensured.

The invention relates to the technical field of mixing pile machines, in particular to a two-way mixing drill bit structure for a mixing pile machine and a construction method.The two-way mixing drill bit structure comprises a sleeve body, and multiple sets of sleeve holes are formed in the outer wall of the sleeve body; a rotary shaking mechanism is arranged in the sleeve body, and an air injection blowing mechanism and a bidirectional rotating mechanism are arranged on the sleeve body; the rotary shaking mechanism comprises sliding grooves formed in the inner wall of the sleeve body and corresponding to the two sides of the sleeve hole, the inner wall of each sliding groove is slidably connected with a lifting plate, a spring is fixedly connected to the position, corresponding to the interior of the corresponding sliding groove, of one end of the outer side of each lifting plate, and each spring is fixedly connected with the corresponding sliding groove. According to the device, a lifting plate can move inwards and outwards, so that a pushing column is driven to do the same movement, soil in a sleeve hole is pushed away, the sleeve hole is prevented from being blocked by the soil, and the flowability of the sleeve hole is guaranteed.

The invention discloses a distributed jet active flow control-based rotor wind tunnel test method, which belongs to the technical field of aviation aerodynamic wind tunnel tests, and comprises the steps of rotor test bed dynamic characteristic test, manipulation matrix calibration, preposed preparation of rotor model dynamic balance and common taper adjustment, and dynamic balance and common taper adjustment. And then hovering and forward flight wind tunnel tests of distributed jet active flow control are carried out in sequence, test data are collected and processed, and the aerodynamic performance of the rotor wing under the condition that jet control exists or not is compared and analyzed. According to the invention, the industrial blank of the lack of a distributed jet active flow control rotor wind tunnel test method is filled, and key technical support is provided for theoretical research, technical optimization and engineering application of the rotor distributed jet active flow control method.

Provided herein are shaped-charges having curved walls to provide better controllable and improved liquid jet parameters. The shaped-charge comprises a container having a plurality of curved walls for containing a liquid. One or more explosive charges are immersed in the liquid and a detonator channel positioned through the container wall to controllably detonate the one or more explosive charges and from a wedge-shaped liquid jet. Multipoint initiation is achieved using a number of initiation points; a location of one or more initiation contact points with the geometrically-shaped explosive charges; and / or an initiation timing of each of the initiation contact points, including simultaneous initiation or a sequence of initiations. Also provided are related methods of forming liquid jets and attendant applications, including target disruption.

The utility model relates to the technical field of fluid mixing, and discloses a fluid mixing device which comprises a main support, a movable support, a plurality of micropore pipes, a vibration mechanism and a flow pushing mechanism, the movable support is movably connected to the main support and provided with a flow inlet structure, the micropore pipes are arranged on the movable support and communicated with the flow inlet structure, and the flow pushing mechanism is arranged on the movable support. The vibrating mechanism comprises a vibrating device which is connected with the movable support so as to drive the multiple microporous pipes to vibrate, the flow pushing mechanism comprises a liquid pump and a flow spraying structure communicated with the liquid discharging end of the liquid pump, the flow spraying structure is provided with a liquid spraying opening, and the flow pushing mechanism can drive liquid to be sprayed out from the liquid spraying opening towards the upper portions of the multiple microporous pipes through the liquid pump. According to the fluid mixing device, fluid micronization can be achieved, the fluid mixing effect is improved, the operation energy consumption is extremely low, and the production cost can be saved.

The invention discloses a method for reducing surface mucosa of a tooth-shaped powder metallurgy die, and belongs to the field of parts for transmitting torque in electric tools and engines. In the jet polishing process of the surface of the middle die step of the tooth-shaped powder metallurgy die, a rubber-diamond mixed material is adopted as a jet abrasive material, the rubber-diamond mixed abrasive material is conveyed into a throwing wheel system in a belt conveying mode, the initial speed of jet fluid is controlled to be 28.3 m / s by adjusting the centrifugal force of an impeller, and the jet polishing process is completed. Million of grinding materials make contact with the surface of the tooth-shaped powder metallurgy die in a sliding mode, the grinding effect is achieved under efficient impact, and finally the polishing effect is achieved. According to the invention, the discharge stress can be obviously eliminated, the surface smoothness is improved, the smoothness is increased, the purpose of preventing powder from sticking films is achieved, and meanwhile, the yield can be greatly increased.

The invention discloses an annular gap jet erosion test device which comprises a water tank, a stirring device, a circulating pipeline system and a jet erosion device, and the jet erosion device comprises a jet gap formed by an inner barrel and an outer barrel, a rotating mechanism and an arc-shaped nozzle structure. The rotating mechanism drives the arc-shaped nozzle to circumferentially rotate so as to adjust the jet flow angle, and the stirring device can realize uniform mixing of sand-containing water. During a test, clear water or sand-containing liquid forms a high-speed jet flow through the annular nozzle to impact the surface of the test piece after the flow rate is controlled by the circulating water pump and the flowmeter, and the erosion fluid circulates back to the water tank through the tail water tank. The device can simulate the spiral rising jet flow working condition of the gap between the runner crown and the top cover of the water turbine, monitors the weight loss and microscopic damage of a test piece by adjusting parameters such as the flow speed, the jet flow angle, the sand content and the gap size, and systematically analyzes the erosion characteristics. The device provides experimental data support for revealing the annular gap jet erosion rule, and has the advantages of being adjustable in multiple parameters, high in simulation precision, convenient to operate and the like.

The invention discloses a rapid calculation method for flow field prediction of a compression system of a variable cycle engine, and the method comprises the steps: building a parameterized mapping model of valve opening and total pressure distribution based on a wall attachment turbulent jet theory; the fan state conversion process is dispersed into a plurality of quasi-steady-state working conditions according to the actuation angle range of a mode selection valve; constructing a total pressure distribution and recovery coefficient prediction module under each working condition by using the parameterized model; the prediction module is embedded into a fluid mechanics solver in the form of boundary conditions, numerical simulation of the state transition process is completed, and performance change data are obtained. According to the scheme, full-three-dimensional complex calculation is replaced by parameterized mapping, the efficiency and precision of variable circulating fan mode conversion performance analysis are remarkably improved, meanwhile, the calculation cost is reduced, and quick-response technical support is provided for compression system optimization design.

An apparatus for generating an ultra-high pressure fluid jet during drilling comprises a drilling motor; a housing structure connected with the drilling motor; and a drill bit assembly connected at the downstream end of the housing structure. The housing structure comprises an oscillation tool configured to transfer a pressure energy from pumped drilling fluid to a closed loop hydraulic circuit and pressurize the same therein; a pressure intensifier pump configured to increase hydraulic pressure of closed loop hydraulic fluid to an ultra-high pressure; and a pressure transfer tool configured to transfer the ultra-high pressure from the closed loop hydraulic fluid to the low-pressure drilling fluid, without any communication between the drilling fluid and closed loop hydraulic fluid and without requiring the drilling fluid to enter pressure intensifier pump. The ultra-high pressure of drilling fluid is directed to the drill bit assembly to aid drilling efficiency in drilling applications.

The invention discloses a jet hole bipolar plate for a water electrolyser, which comprises a main polar plate, the two ends of the main polar plate are respectively provided with an electrolyte inlet and outlet part, the inner side of the electrolyte inlet and outlet part is provided with a shunting area, and the electrolyte inlet and outlet part is communicated with a runner area in the middle of the main polar plate through the shunting area; the cathode plate and the anode plate are arranged on the front side and the rear side of the main polar plate respectively, the cathode plate and the anode plate and the corresponding runner areas form an overflowing cavity, a plurality of jet flow holes are formed in the cathode plate and the anode plate, and the jet flow holes are communicated with the overflowing cavity; after being guided in through the electrolyte inlet and outlet part, electrolyte flows into the overflowing cavity through the shunting area, and uniformly flows out through the jet flow holes in the flowing process in the overflowing cavity. According to the invention, the runner region is optimized, and the array jet holes are formed in the bipolar plate, so that the electrolyte entering the electrochemical reaction region is distributed more uniformly, the problem of incomplete reaction or low efficiency caused by insufficient fluid on the surface of the electrode is avoided, and the utilization rate of the electrode and the electrolytic efficiency are improved.

The invention provides a Venturi tube anti-flash-rust agent filling mechanism which comprises a Venturi jet device, the inside of the Venturi jet device is sequentially provided with a first inlet section, a first contraction section, a first throat part and a first diffusion section from left to right, the first inlet section is cylindrical, the first contraction section is gradually contracted from the tail end of the first inlet section, and the first throat part is communicated with the first diffusion section. The first throat part is the position with the smallest pipe diameter, and the first diffusion section is gradually enlarged from the tail end of the first throat part. Compared with the prior art, the device has the following beneficial effects that the independent mixing mechanism is arranged, the mixing cylinder is integrated at the joint of the venturi jet device and the venturi flow meter, and not only is the mixing impeller arranged in the cylinder, but also the baffle plates arranged at equal intervals are arranged in the cylinder. When the fluid flows through the mixing cylinder, the mixing impeller rotates under the pushing of the fluid to actively stir the flash rust preventing agent and the main fluid, and the baffle plate further changes the flow direction of the fluid to form a turbulent flow effect, so that the mixing uniformity is greatly improved.

The invention relates to the technical field of micro-nano bubbles, discloses a gas-water double-shearing micro-nano bubble generation method and equipment, and comprises the gas-water double-shearing micro-nano bubble generation equipment. Comprising a water spraying unit for generating high-speed atomized water flow, a gas-water premixing unit for premixing gas and water by adopting gas-water rotary cutting, a gas-water mixing unit for adopting rotary cutting, a gas-water double-shearing mixing unit for gas-water double shearing and a uniform stabilizing unit for stabilizing and discharging micro-nano bubbles. Based on the phenomena of self-excited oscillation, jet mixing and gas-liquid interface in fluid dynamics, by combining various mature fluid dynamics principles of cavitation effect, Venturi effect, shear breaking, impinging stream mixing and static mixing, the design of multiple gas chambers is added, especially the cavitation cavity, the annular gas chamber and the double-shear configuration, gas self-absorption is achieved, and the gas self-absorption effect is achieved. And the generation efficiency and uniformity of the bubbles are effectively improved.

The present invention relates to a multistage series microreactor and a fluid mixing method. The microreactor includes a base internally etched with a fluid passage, the base being provided with a fluid inlet and a fluid outlet which are communicated with the fluid passage, where the fluid passage includes a plurality of micro mixing tanks, a jet port is formed at an inlet of the micro mixing tank, adjacent micro mixing tanks are connected by jet port at a contraction section, and a splayed flow baffle plate and a flow splitting column which are arranged corresponding to the jet port are provided in the micro mixing tank, the flow splitting column being arranged below the splayed flow baffle plate. By means of a jet manner, a fluid to be mixed in the invention can be continuously split, compounded, stretched and crushed, thereby realizing rapid mixing and efficient, continuous reaction.